Release 6.3.1

Fix documentation
Release 6.3.0
2021-08-16 19:52:35 -07:00 · 2021-08-16 19:52:15 -07:00 · 2021-08-16 19:36:27 -07:00 · 2021-08-16 19:33:29 -07:00 · 2021-08-14 21:38:31 -07:00 · 2021-08-14 21:08:44 -07:00
37 changed files with 1700 additions and 619 deletions
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 /* End PBXBuildFile section */

 /* Begin PBXContainerItemProxy section */
@@ -29,9 +28,7 @@

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-		4E9F82E3AA46F1DA40F32F7F /* Pods_SwiftAudioPlayer_Tests.framework */ = {isa = PBXFileReference; explicitFileType = wrapper.framework; includeInIndex = 0; path = Pods_SwiftAudioPlayer_Tests.framework; sourceTree = BUILT_PRODUCTS_DIR; };
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 		607FACD51AFB9204008FA782 /* AppDelegate.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = AppDelegate.swift; sourceTree = "<group>"; };
@@ -43,6 +40,7 @@
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+		A470FEE1260303DA00F135FF /* Model.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = Model.swift; sourceTree = "<group>"; };
 		AF6A2C6BF79C291056D27D5D /* SwiftAudioPlayer.podspec */ = {isa = PBXFileReference; includeInIndex = 1; lastKnownFileType = text; name = SwiftAudioPlayer.podspec; path = ../SwiftAudioPlayer.podspec; sourceTree = "<group>"; xcLanguageSpecificationIdentifier = xcode.lang.ruby; };
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 		DA80DEA33D13EC91EB531881 /* README.md */ = {isa = PBXFileReference; includeInIndex = 1; lastKnownFileType = net.daringfireball.markdown; name = README.md; path = ../README.md; sourceTree = "<group>"; };
@@ -54,7 +52,6 @@
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 			files = (
-				E5808EC0557FB2395AA56468 /* Pods_SwiftAudioPlayer_Example.framework in Frameworks */,
 			);
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@@ -62,22 +59,12 @@
 			isa = PBXFrameworksBuildPhase;
 			buildActionMask = 2147483647;
 			files = (
-				41B4A1BE666DAEDD342DBACF /* Pods_SwiftAudioPlayer_Tests.framework in Frameworks */,
 			);
 			runOnlyForDeploymentPostprocessing = 0;
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 /* End PBXFrameworksBuildPhase section */

 /* Begin PBXGroup section */
-		408E805A4561B2F63083E539 /* Frameworks */ = {
-			isa = PBXGroup;
-			children = (
-				1E5C0E3F3235B6FFE85EF425 /* Pods_SwiftAudioPlayer_Example.framework */,
-				4E9F82E3AA46F1DA40F32F7F /* Pods_SwiftAudioPlayer_Tests.framework */,
-			);
-			name = Frameworks;
-			sourceTree = "<group>";
-		};
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@@ -97,7 +84,6 @@
 				607FACE81AFB9204008FA782 /* Tests */,
 				607FACD11AFB9204008FA782 /* Products */,
 				4246ED1215E81CA7B8F0AB36 /* Pods */,
-				408E805A4561B2F63083E539 /* Frameworks */,
 			);
 			sourceTree = "<group>";
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@@ -115,6 +101,7 @@
 			children = (
 				607FACD51AFB9204008FA782 /* AppDelegate.swift */,
 				607FACD71AFB9204008FA782 /* ViewController.swift */,
+				A470FEE1260303DA00F135FF /* Model.swift */,
 				607FACD91AFB9204008FA782 /* Main.storyboard */,
 				607FACDC1AFB9204008FA782 /* Images.xcassets */,
 				607FACDE1AFB9204008FA782 /* LaunchScreen.xib */,
@@ -324,6 +311,7 @@
 			isa = PBXSourcesBuildPhase;
 			buildActionMask = 2147483647;
 			files = (
+				A470FEE2260303DA00F135FF /* Model.swift in Sources */,
 				607FACD81AFB9204008FA782 /* ViewController.swift in Sources */,
 				607FACD61AFB9204008FA782 /* AppDelegate.swift in Sources */,
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@@ -1,11 +1,9 @@
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-    <device id="retina4_7" orientation="portrait">
-        <adaptation id="fullscreen"/>
-    </device>
+<document type="com.apple.InterfaceBuilder3.CocoaTouch.Storyboard.XIB" version="3.0" toolsVersion="18122" targetRuntime="iOS.CocoaTouch" propertyAccessControl="none" useAutolayout="YES" useTraitCollections="YES" colorMatched="YES" initialViewController="vXZ-lx-hvc">
+    <device id="retina4_7" orientation="portrait" appearance="light"/>
    <dependencies>
        <deployment identifier="iOS"/>
-        <plugIn identifier="com.apple.InterfaceBuilder.IBCocoaTouchPlugin" version="14460.20"/>
+        <plugIn identifier="com.apple.InterfaceBuilder.IBCocoaTouchPlugin" version="18093"/>
        <capability name="documents saved in the Xcode 8 format" minToolsVersion="8.0"/>
    </dependencies>
    <scenes>
@@ -22,13 +20,13 @@
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                        <subviews>
                            <progressView opaque="NO" contentMode="scaleToFill" verticalHuggingPriority="750" translatesAutoresizingMaskIntoConstraints="NO" id="lTK-Hd-Tl2">
-                                <rect key="frame" x="16" y="320" width="343" height="2"/>
+                                <rect key="frame" x="16" y="303" width="343" height="4"/>
                                <color key="tintColor" white="0.0" alpha="0.0" colorSpace="custom" customColorSpace="genericGamma22GrayColorSpace"/>
                                <color key="progressTintColor" red="0.46202266219999999" green="0.83828371759999998" blue="1" alpha="1" colorSpace="custom" customColorSpace="sRGB"/>
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-                                <rect key="frame" x="14" y="305" width="347" height="31"/>
+                                <rect key="frame" x="14" y="289" width="347" height="31"/>
                                <color key="backgroundColor" white="0.0" alpha="0.0" colorSpace="custom" customColorSpace="genericGamma22GrayColorSpace"/>
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@@ -37,134 +35,191 @@
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                                </connections>
                            </slider>
-                            <button opaque="NO" contentMode="scaleToFill" contentHorizontalAlignment="center" contentVerticalAlignment="center" buttonType="roundedRect" lineBreakMode="middleTruncation" translatesAutoresizingMaskIntoConstraints="NO" id="jUc-tP-CC5">
-                                <rect key="frame" x="172.5" y="250" width="30" height="30"/>
+                            <button opaque="NO" contentMode="scaleToFill" contentHorizontalAlignment="center" contentVerticalAlignment="center" buttonType="system" lineBreakMode="middleTruncation" translatesAutoresizingMaskIntoConstraints="NO" id="jUc-tP-CC5">
+                                <rect key="frame" x="172.5" y="233" width="30" height="30"/>
                                <state key="normal" title="play"/>
                                <connections>
                                    <action selector="playPauseTouched:" destination="vXZ-lx-hvc" eventType="touchUpInside" id="Avk-K3-EZ7"/>
                                </connections>
                            </button>
-                            <button opaque="NO" contentMode="scaleToFill" contentHorizontalAlignment="center" contentVerticalAlignment="center" buttonType="roundedRect" lineBreakMode="middleTruncation" translatesAutoresizingMaskIntoConstraints="NO" id="tFH-sY-Xu9">
-                                <rect key="frame" x="62.5" y="250" width="30" height="30"/>
+                            <button opaque="NO" contentMode="scaleToFill" contentHorizontalAlignment="center" contentVerticalAlignment="center" buttonType="system" lineBreakMode="middleTruncation" translatesAutoresizingMaskIntoConstraints="NO" id="tFH-sY-Xu9">
+                                <rect key="frame" x="62.5" y="233" width="30" height="30"/>
                                <state key="normal" title="-15"/>
                                <connections>
                                    <action selector="skipBackwardTouched:" destination="vXZ-lx-hvc" eventType="touchUpInside" id="PCT-BE-udf"/>
                                </connections>
                            </button>
-                            <button opaque="NO" contentMode="scaleToFill" contentHorizontalAlignment="center" contentVerticalAlignment="center" buttonType="roundedRect" lineBreakMode="middleTruncation" translatesAutoresizingMaskIntoConstraints="NO" id="0QE-3F-a4G">
-                                <rect key="frame" x="282.5" y="250" width="30" height="30"/>
+                            <button opaque="NO" contentMode="scaleToFill" contentHorizontalAlignment="center" contentVerticalAlignment="center" buttonType="system" lineBreakMode="middleTruncation" translatesAutoresizingMaskIntoConstraints="NO" id="0QE-3F-a4G">
+                                <rect key="frame" x="282.5" y="233" width="30" height="30"/>
                                <state key="normal" title="+30"/>
                                <connections>
                                    <action selector="skipForwardTouched:" destination="vXZ-lx-hvc" eventType="touchUpInside" id="uXv-bz-tnt"/>
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-                                <rect key="frame" x="14" y="464" width="347" height="31"/>
+                                <rect key="frame" x="14" y="448" width="347" height="31"/>
                                <connections>
                                    <action selector="rateChanged:" destination="vXZ-lx-hvc" eventType="valueChanged" id="FDJ-jA-bm8"/>
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-                                <rect key="frame" x="14" y="397" width="347" height="31"/>
+                                <rect key="frame" x="14" y="381" width="347" height="31"/>
                                <connections>
                                    <action selector="reverbChanged:" destination="vXZ-lx-hvc" eventType="valueChanged" id="J8Q-be-35q"/>
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-                                <rect key="frame" x="16" y="80" width="343" height="29"/>
+                                <rect key="frame" x="16" y="60" width="343" height="32"/>
                                <segments>
                                    <segment title="Soundbite"/>
-                                    <segment title="Acquired"/>
-                                    <segment title="Y Combinator"/>
+                                    <segment title="Podcast"/>
+                                    <segment title="Radio"/>
                                </segments>
                                <connections>
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                                </connections>
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-                                <rect key="frame" x="78" y="140" width="69" height="30"/>
+                            <button opaque="NO" contentMode="scaleToFill" contentHorizontalAlignment="center" contentVerticalAlignment="center" buttonType="system" lineBreakMode="middleTruncation" translatesAutoresizingMaskIntoConstraints="NO" id="KDu-ea-kF8">
+                                <rect key="frame" x="43" y="123" width="69" height="30"/>
                                <state key="normal" title="Download"/>
                                <connections>
                                    <action selector="downloadTouched:" destination="vXZ-lx-hvc" eventType="touchUpInside" id="8Jg-1C-0Ms"/>
                                </connections>
                            </button>
-                            <button opaque="NO" contentMode="scaleToFill" contentHorizontalAlignment="center" contentVerticalAlignment="center" buttonType="roundedRect" lineBreakMode="middleTruncation" translatesAutoresizingMaskIntoConstraints="NO" id="6d9-Bc-hIz">
-                                <rect key="frame" x="244" y="140" width="49" height="30"/>
-                                <state key="normal" title="Stream"/>
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                            <label opaque="NO" userInteractionEnabled="NO" contentMode="left" horizontalHuggingPriority="251" verticalHuggingPriority="251" text="rate: 1.0x" textAlignment="natural" lineBreakMode="tailTruncation" baselineAdjustment="alignBaselines" adjustsFontSizeToFit="NO" translatesAutoresizingMaskIntoConstraints="NO" id="yUQ-mI-ozK">
-                                <rect key="frame" x="153" y="435" width="69" height="21"/>
+                                <rect key="frame" x="153" y="419" width="69" height="21"/>
                                <fontDescription key="fontDescription" type="system" pointSize="17"/>
                                <nil key="textColor"/>
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-                                <rect key="frame" x="16" y="297" width="27" height="15"/>
+                                <rect key="frame" x="16" y="280" width="27" height="15"/>
                                <fontDescription key="fontDescription" type="system" pointSize="12"/>
                                <nil key="textColor"/>
                                <nil key="highlightedColor"/>
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-                                <rect key="frame" x="319" y="297" width="40" height="15"/>
+                                <rect key="frame" x="319" y="280" width="40" height="15"/>
                                <fontDescription key="fontDescription" type="system" pointSize="12"/>
                                <nil key="textColor"/>
                                <nil key="highlightedColor"/>
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-                                <rect key="frame" x="16" y="207" width="343" height="16"/>
+                                <rect key="frame" x="16" y="190" width="343" height="16"/>
                                <fontDescription key="fontDescription" type="system" pointSize="13"/>
                                <nil key="textColor"/>
                                <nil key="highlightedColor"/>
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                            <label opaque="NO" userInteractionEnabled="NO" contentMode="left" horizontalHuggingPriority="251" verticalHuggingPriority="251" text="reverb: 300.0" textAlignment="natural" lineBreakMode="tailTruncation" baselineAdjustment="alignBaselines" adjustsFontSizeToFit="NO" translatesAutoresizingMaskIntoConstraints="NO" id="y5i-MZ-Qat">
-                                <rect key="frame" x="136" y="368" width="103" height="21"/>
+                                <rect key="frame" x="136.5" y="352" width="102" height="21"/>
                                <fontDescription key="fontDescription" type="system" pointSize="17"/>
                                <nil key="textColor"/>
                                <nil key="highlightedColor"/>
                            </label>
+                            <label opaque="NO" userInteractionEnabled="NO" contentMode="left" horizontalHuggingPriority="251" verticalHuggingPriority="251" text="Skip Silences" textAlignment="natural" lineBreakMode="tailTruncation" baselineAdjustment="alignBaselines" adjustsFontSizeToFit="NO" translatesAutoresizingMaskIntoConstraints="NO" id="M2y-FP-H1D">
+                                <rect key="frame" x="89" y="504" width="101" height="21"/>
+                                <fontDescription key="fontDescription" type="system" pointSize="17"/>
+                                <nil key="textColor"/>
+                                <nil key="highlightedColor"/>
+                            </label>
+                            <switch opaque="NO" contentMode="scaleToFill" horizontalHuggingPriority="750" verticalHuggingPriority="750" contentHorizontalAlignment="center" contentVerticalAlignment="center" translatesAutoresizingMaskIntoConstraints="NO" id="2cn-E5-TeQ">
+                                <rect key="frame" x="226" y="499" width="51" height="31"/>
+                                <connections>
+                                    <action selector="skipSilencesSwitched:" destination="vXZ-lx-hvc" eventType="valueChanged" id="p7X-Y8-7hO"/>
+                                </connections>
+                            </switch>
+                            <switch opaque="NO" contentMode="scaleToFill" horizontalHuggingPriority="750" verticalHuggingPriority="750" contentHorizontalAlignment="center" contentVerticalAlignment="center" translatesAutoresizingMaskIntoConstraints="NO" id="IGe-aU-Y6D">
+                                <rect key="frame" x="226" y="540" width="51" height="31"/>
+                                <connections>
+                                    <action selector="sleepSwitched:" destination="vXZ-lx-hvc" eventType="valueChanged" id="noa-m8-VHy"/>
+                                </connections>
+                            </switch>
+                            <label opaque="NO" userInteractionEnabled="NO" contentMode="left" horizontalHuggingPriority="251" verticalHuggingPriority="251" text="Sleep After 5 s" textAlignment="natural" lineBreakMode="tailTruncation" baselineAdjustment="alignBaselines" adjustsFontSizeToFit="NO" translatesAutoresizingMaskIntoConstraints="NO" id="vf6-kr-yWa">
+                                <rect key="frame" x="83" y="545" width="112" height="21"/>
+                                <fontDescription key="fontDescription" type="system" pointSize="17"/>
+                                <nil key="textColor"/>
+                                <nil key="highlightedColor"/>
+                            </label>
+                            <label opaque="NO" userInteractionEnabled="NO" contentMode="left" horizontalHuggingPriority="251" verticalHuggingPriority="251" text="Loop" textAlignment="natural" lineBreakMode="tailTruncation" baselineAdjustment="alignBaselines" adjustsFontSizeToFit="NO" translatesAutoresizingMaskIntoConstraints="NO" id="JOr-pf-CKN">
+                                <rect key="frame" x="152" y="588" width="38" height="21"/>
+                                <fontDescription key="fontDescription" type="system" pointSize="17"/>
+                                <nil key="textColor"/>
+                                <nil key="highlightedColor"/>
+                            </label>
+                            <button opaque="NO" contentMode="scaleToFill" contentHorizontalAlignment="center" contentVerticalAlignment="center" buttonType="system" lineBreakMode="middleTruncation" translatesAutoresizingMaskIntoConstraints="NO" id="pVf-cJ-9ca">
+                                <rect key="frame" x="164.5" y="123" width="46" height="30"/>
+                                <state key="normal" title="Queue"/>
+                                <connections>
+                                    <action selector="queueTouched:" destination="vXZ-lx-hvc" eventType="touchUpInside" id="qRj-oT-AV1"/>
+                                </connections>
+                            </button>
+                            <button opaque="NO" contentMode="scaleToFill" contentHorizontalAlignment="center" contentVerticalAlignment="center" buttonType="system" lineBreakMode="middleTruncation" translatesAutoresizingMaskIntoConstraints="NO" id="6d9-Bc-hIz">
+                                <rect key="frame" x="282" y="123" width="49" height="30"/>
+                                <state key="normal" title="Stream"/>
+                                <connections>
+                                    <action selector="streamTouched:" destination="vXZ-lx-hvc" eventType="touchUpInside" id="AXY-N7-87Y"/>
+                                </connections>
+                            </button>
+                            <switch opaque="NO" contentMode="scaleToFill" horizontalHuggingPriority="750" verticalHuggingPriority="750" contentHorizontalAlignment="center" contentVerticalAlignment="center" translatesAutoresizingMaskIntoConstraints="NO" id="cfU-Rp-Kqf">
+                                <rect key="frame" x="226" y="583" width="51" height="31"/>
+                                <connections>
+                                    <action selector="loopSwitched:" destination="vXZ-lx-hvc" eventType="valueChanged" id="psj-Vs-9BI"/>
+                                </connections>
+                            </switch>
                        </subviews>
                        <color key="backgroundColor" red="1" green="1" blue="1" alpha="1" colorSpace="custom" customColorSpace="sRGB"/>
                        <constraints>
                            <constraint firstItem="nsl-df-P21" firstAttribute="top" secondItem="y5i-MZ-Qat" secondAttribute="bottom" constant="8" id="0aM-Sz-J9k"/>
                            <constraint firstItem="lTK-Hd-Tl2" firstAttribute="leading" secondItem="kh9-bI-dsS" secondAttribute="leading" constant="16" id="1wb-IW-jYz"/>
                            <constraint firstItem="j3w-gr-HzF" firstAttribute="leading" secondItem="lTK-Hd-Tl2" secondAttribute="leading" id="26c-ZJ-768"/>
+                            <constraint firstItem="JOr-pf-CKN" firstAttribute="top" secondItem="vf6-kr-yWa" secondAttribute="bottom" constant="22" id="4UI-XL-M9D"/>
                            <constraint firstItem="jUc-tP-CC5" firstAttribute="top" secondItem="KDu-ea-kF8" secondAttribute="bottom" constant="80" id="5sT-An-9vw"/>
                            <constraint firstItem="6d9-Bc-hIz" firstAttribute="leading" relation="greaterThanOrEqual" secondItem="KDu-ea-kF8" secondAttribute="trailing" constant="8" symbolic="YES" id="60t-zV-EiY"/>
+                            <constraint firstItem="2cn-E5-TeQ" firstAttribute="centerY" secondItem="M2y-FP-H1D" secondAttribute="centerY" id="6QX-Ru-ZbO"/>
                            <constraint firstItem="joK-xi-MCo" firstAttribute="leading" secondItem="lTK-Hd-Tl2" secondAttribute="leading" id="7KA-Mg-HFD"/>
                            <constraint firstItem="vfk-OJ-S3T" firstAttribute="trailing" secondItem="lTK-Hd-Tl2" secondAttribute="trailing" id="8PP-Pp-1Hc"/>
                            <constraint firstItem="joK-xi-MCo" firstAttribute="trailing" secondItem="lTK-Hd-Tl2" secondAttribute="trailing" id="AH1-Uu-eLB"/>
                            <constraint firstItem="joK-xi-MCo" firstAttribute="top" secondItem="jyV-Pf-zRb" secondAttribute="bottom" constant="60" id="Ba7-nd-oCD"/>
+                            <constraint firstItem="pVf-cJ-9ca" firstAttribute="centerY" secondItem="KDu-ea-kF8" secondAttribute="centerY" id="Cma-VU-v2t"/>
                            <constraint firstItem="Urj-Dv-41y" firstAttribute="centerY" secondItem="j3w-gr-HzF" secondAttribute="centerY" id="Fvd-7V-Rr8"/>
                            <constraint firstItem="1IX-z5-wWx" firstAttribute="leading" secondItem="joK-xi-MCo" secondAttribute="leading" id="GeX-7f-jzu"/>
                            <constraint firstItem="0QE-3F-a4G" firstAttribute="leading" relation="greaterThanOrEqual" secondItem="jUc-tP-CC5" secondAttribute="trailing" constant="8" symbolic="YES" id="JP5-yW-eVB"/>
+                            <constraint firstItem="cfU-Rp-Kqf" firstAttribute="leading" secondItem="JOr-pf-CKN" secondAttribute="trailing" constant="36" id="JxU-kl-pkL"/>
                            <constraint firstItem="yUQ-mI-ozK" firstAttribute="top" secondItem="w2a-RA-zmI" secondAttribute="bottom" constant="100" id="K1K-8N-SpD"/>
+                            <constraint firstItem="IGe-aU-Y6D" firstAttribute="centerY" secondItem="vf6-kr-yWa" secondAttribute="centerY" id="K1s-td-R7b"/>
+                            <constraint firstItem="vf6-kr-yWa" firstAttribute="leading" secondItem="kh9-bI-dsS" secondAttribute="leading" constant="83" id="M0b-b2-UnQ"/>
                            <constraint firstItem="vfk-OJ-S3T" firstAttribute="leading" secondItem="lTK-Hd-Tl2" secondAttribute="leading" id="NOY-IO-NIJ"/>
                            <constraint firstItem="tFH-sY-Xu9" firstAttribute="centerY" secondItem="jUc-tP-CC5" secondAttribute="centerY" id="Rre-EY-kVY"/>
-                            <constraint firstItem="KDu-ea-kF8" firstAttribute="leading" secondItem="kh9-bI-dsS" secondAttribute="leading" constant="78" id="SRU-sX-z5b"/>
+                            <constraint firstItem="KDu-ea-kF8" firstAttribute="leading" secondItem="kh9-bI-dsS" secondAttribute="leading" constant="43" id="SRU-sX-z5b"/>
+                            <constraint firstItem="cfU-Rp-Kqf" firstAttribute="centerY" secondItem="JOr-pf-CKN" secondAttribute="centerY" id="Tox-y4-XVg"/>
                            <constraint firstItem="w2a-RA-zmI" firstAttribute="trailing" secondItem="lTK-Hd-Tl2" secondAttribute="trailing" id="Vki-IZ-AdN"/>
                            <constraint firstItem="lTK-Hd-Tl2" firstAttribute="top" secondItem="j3w-gr-HzF" secondAttribute="bottom" constant="8" id="Wwx-Uo-yIC"/>
+                            <constraint firstItem="IGe-aU-Y6D" firstAttribute="leading" secondItem="vf6-kr-yWa" secondAttribute="trailing" constant="31" id="XpW-wP-Iyh"/>
+                            <constraint firstItem="vf6-kr-yWa" firstAttribute="top" secondItem="M2y-FP-H1D" secondAttribute="bottom" constant="20" id="Y8L-El-ycq"/>
                            <constraint firstItem="nsl-df-P21" firstAttribute="leading" secondItem="vfk-OJ-S3T" secondAttribute="leading" id="a5C-nZ-8Jc"/>
                            <constraint firstItem="yUQ-mI-ozK" firstAttribute="centerX" secondItem="kh9-bI-dsS" secondAttribute="centerX" id="a66-h4-WVf"/>
                            <constraint firstItem="Urj-Dv-41y" firstAttribute="trailing" secondItem="lTK-Hd-Tl2" secondAttribute="trailing" id="aKt-EV-Bwd"/>
                            <constraint firstItem="tFH-sY-Xu9" firstAttribute="top" secondItem="1IX-z5-wWx" secondAttribute="bottom" constant="27" id="bIq-V0-Sac"/>
+                            <constraint firstItem="M2y-FP-H1D" firstAttribute="top" secondItem="vfk-OJ-S3T" secondAttribute="bottom" constant="26" id="bsl-hj-xUt"/>
                            <constraint firstItem="tFH-sY-Xu9" firstAttribute="leading" secondItem="kh9-bI-dsS" secondAttribute="leading" constant="62.5" id="cH6-q6-Lel"/>
                            <constraint firstItem="yUQ-mI-ozK" firstAttribute="top" secondItem="nsl-df-P21" secondAttribute="bottom" constant="8" id="cKV-wk-6P9"/>
                            <constraint firstItem="jUc-tP-CC5" firstAttribute="centerX" secondItem="kh9-bI-dsS" secondAttribute="centerX" id="cgM-Nj-yit"/>
+                            <constraint firstItem="JOr-pf-CKN" firstAttribute="leading" secondItem="kh9-bI-dsS" secondAttribute="leading" constant="152" id="cgd-E2-XpJ"/>
                            <constraint firstItem="KDu-ea-kF8" firstAttribute="top" secondItem="joK-xi-MCo" secondAttribute="bottom" constant="32" id="dLw-rF-Pfb"/>
                            <constraint firstItem="w2a-RA-zmI" firstAttribute="leading" secondItem="lTK-Hd-Tl2" secondAttribute="leading" id="daz-b0-eCC"/>
                            <constraint firstItem="jUc-tP-CC5" firstAttribute="leading" relation="greaterThanOrEqual" secondItem="tFH-sY-Xu9" secondAttribute="trailing" constant="8" symbolic="YES" id="fS9-Ce-4ph"/>
                            <constraint firstItem="Urj-Dv-41y" firstAttribute="leading" relation="greaterThanOrEqual" secondItem="j3w-gr-HzF" secondAttribute="trailing" constant="8" symbolic="YES" id="fu0-ZZ-rj9"/>
                            <constraint firstAttribute="trailing" secondItem="lTK-Hd-Tl2" secondAttribute="trailing" constant="16" id="gdg-7Y-7la"/>
                            <constraint firstAttribute="trailing" secondItem="1IX-z5-wWx" secondAttribute="trailing" constant="16" id="hHM-jO-RZd"/>
+                            <constraint firstItem="pVf-cJ-9ca" firstAttribute="centerX" secondItem="joK-xi-MCo" secondAttribute="centerX" id="lOM-Fa-KdR"/>
+                            <constraint firstItem="2cn-E5-TeQ" firstAttribute="leading" secondItem="M2y-FP-H1D" secondAttribute="trailing" constant="36" id="laG-3h-LI7"/>
                            <constraint firstItem="6d9-Bc-hIz" firstAttribute="top" secondItem="joK-xi-MCo" secondAttribute="bottom" constant="32" id="m9s-An-IWV"/>
                            <constraint firstItem="vfk-OJ-S3T" firstAttribute="top" secondItem="yUQ-mI-ozK" secondAttribute="bottom" constant="8" id="oaW-rr-UVN"/>
                            <constraint firstItem="nsl-df-P21" firstAttribute="trailing" secondItem="vfk-OJ-S3T" secondAttribute="trailing" id="r5e-Wq-dqV"/>
                            <constraint firstItem="y5i-MZ-Qat" firstAttribute="centerX" secondItem="nsl-df-P21" secondAttribute="centerX" id="reC-GA-ZgT"/>
                            <constraint firstAttribute="trailing" secondItem="0QE-3F-a4G" secondAttribute="trailing" constant="62.5" id="tg1-gr-hdd"/>
-                            <constraint firstAttribute="trailing" secondItem="6d9-Bc-hIz" secondAttribute="trailing" constant="82" id="vtN-y4-iqp"/>
+                            <constraint firstItem="M2y-FP-H1D" firstAttribute="leading" secondItem="kh9-bI-dsS" secondAttribute="leading" constant="89" id="vcF-gP-oe0"/>
+                            <constraint firstAttribute="trailing" secondItem="6d9-Bc-hIz" secondAttribute="trailing" constant="44" id="vtN-y4-iqp"/>
                            <constraint firstItem="0QE-3F-a4G" firstAttribute="centerY" secondItem="jUc-tP-CC5" secondAttribute="centerY" id="xDi-tj-bBF"/>
                            <constraint firstItem="lTK-Hd-Tl2" firstAttribute="top" secondItem="jUc-tP-CC5" secondAttribute="bottom" constant="40" id="ytQ-s4-kJm"/>
                            <constraint firstItem="w2a-RA-zmI" firstAttribute="centerY" secondItem="lTK-Hd-Tl2" secondAttribute="centerY" constant="-1" id="zHt-h3-4ig"/>
@@ -177,6 +232,7 @@
                        <outlet property="currentUrlLocationLabel" destination="1IX-z5-wWx" id="MuO-fF-ZxL"/>
                        <outlet property="downloadButton" destination="KDu-ea-kF8" id="5o4-1h-y06"/>
                        <outlet property="durationLabel" destination="Urj-Dv-41y" id="mIq-eh-int"/>
+                        <outlet property="loopSwitch" destination="cfU-Rp-Kqf" id="wTZ-Sr-mV4"/>
                        <outlet property="playPauseButton" destination="jUc-tP-CC5" id="e9C-zV-A1B"/>
                        <outlet property="rateLabel" destination="yUQ-mI-ozK" id="Dx4-lO-A1B"/>
                        <outlet property="rateSlider" destination="vfk-OJ-S3T" id="mNc-ET-aNM"/>
@@ -185,6 +241,8 @@
                        <outlet property="scrubberSlider" destination="w2a-RA-zmI" id="VbI-tT-lbc"/>
                        <outlet property="skipBackwardButton" destination="tFH-sY-Xu9" id="LwM-2S-m6F"/>
                        <outlet property="skipForwardButton" destination="0QE-3F-a4G" id="cQ7-b7-pW7"/>
+                        <outlet property="skipSilencesSwitch" destination="2cn-E5-TeQ" id="TRI-IT-YJT"/>
+                        <outlet property="sleepSwitch" destination="IGe-aU-Y6D" id="BZn-9C-hOk"/>
                        <outlet property="streamButton" destination="6d9-Bc-hIz" id="DZe-ga-3RV"/>
                    </connections>
                </viewController>
@@ -0,0 +1,89 @@
+//
+//  Model.swift
+//  SwiftAudioPlayer_Example
+//
+//  Created by Tanha Kabir on 3/17/21.
+//  Copyright © 2021 CocoaPods. All rights reserved.
+//
+
+import Foundation
+import SwiftAudioPlayer
+
+struct AudioInfo: Hashable {
+    var index: Int = 0
+    
+    var urls: [URL] = [URL(string: "https://www.fesliyanstudios.com/musicfiles/2019-04-23_-_Trusted_Advertising_-_www.fesliyanstudios.com/15SecVersion2019-04-23_-_Trusted_Advertising_-_www.fesliyanstudios.com.mp3")!,
+                       URL(string: "https://chtbl.com/track/18338/traffic.libsyn.com/secure/acquired/acquired_-_armrev_2.mp3?dest-id=376122")!,
+                       URL(string: "https://ice6.somafm.com/groovesalad-256-mp3")!]
+    
+    var url: URL {
+        switch index {
+        case 0:
+            return urls[0]
+        case 1:
+            return urls[1]
+        case 2:
+            return urls[2]
+        default:
+            return urls[0]
+        }
+    }
+    
+    var title: String {
+        switch index {
+        case 0:
+            return "Soundbite"
+        case 1:
+            return "Podcast"
+        case 2:
+            return "Radio"
+        default:
+            return "Soundbite"
+        }
+    }
+    
+    let artist: String = "SwiftAudioPlayer Sample App"
+    let releaseDate: Int = 1550790640
+    
+    var lockscreenInfo: SALockScreenInfo {
+        get {
+            return SALockScreenInfo(title: self.title, artist: self.artist, albumTitle: nil, artwork: nil, releaseDate: self.releaseDate)
+        }
+    }
+    
+    var savedUrl: URL? {
+        get {
+            return savedUrls[index]
+        }
+    }
+    
+    var savedUrls: [URL?] = [nil, nil, nil]
+    
+    mutating func addSavedUrl(_ url: URL) {
+        savedUrls[index] = url
+    }
+    
+    mutating func deleteSavedUrl() {
+        savedUrls[index] = nil
+    }
+    
+    mutating func addSavedUrl(_ url: URL, atIndex i: Int) {
+        savedUrls[i] = url
+    }
+    
+    mutating func deleteSavedUrl(atIndex i: Int) {
+        savedUrls[i] = nil
+    }
+    
+    func getUrl(atIndex i: Int) -> URL {
+        return urls[i]
+    }
+    
+    mutating func setIndex(_ i: Int) {
+        index = i
+    }
+    
+    func getIndex(forURL url: URL) -> Int? {
+        return urls.firstIndex(of: url) ?? savedUrls.firstIndex(of: url)
+    }
+}
@@ -11,54 +11,8 @@ import SwiftAudioPlayer
 import AVFoundation

 class ViewController: UIViewController {
-    struct AudioInfo: Hashable {
-        let index: Int
-        
-        var url: URL {
-            switch index {
-            case 0:
-                return URL(string: "https://cdn.fastlearner.media/bensound-rumble.mp3")!
-            case 1:
-                return URL(string: "https://chtbl.com/track/18338/traffic.libsyn.com/secure/acquired/acquired_-_armrev_2.mp3?dest-id=376122")!
-            case 2:
-                return URL(string: "https://backtracks.fm/ycombinator/pr/0f685f72-29b1-11e9-9bcf-0ece7a7d2472/111---jake-klamka-and-kevin-hale---y-combinator.mp3?s=1&amp;sd=1&amp;u=1549423185")!
-            default:
-                return URL(string: "https://cdn.fastlearner.media/bensound-rumble.mp3")!
-            }
-        }
-        
-        var title: String {
-            switch index {
-            case 0:
-                return "Soundbite"
-            case 1:
-                return "Acquired"
-            case 2:
-                return "Y Combinator"
-            default:
-                return "Soundbite"
-            }
-        }
-        
-        let artist: String = "SwiftAudioPlayer Sample App"
-        let releaseDate: Int = 1550790640
-    }
+    var selectedAudio: AudioInfo = AudioInfo(index: 0)
    
-    var savedUrls: [AudioInfo: URL] = [:]
-    
-    var selectedAudio: AudioInfo = AudioInfo(index: 0) {
-        didSet {
-            if SAPlayer.Downloader.isDownloaded(withRemoteUrl: selectedAudio.url) {
-                downloadButton.setTitle("Delete downloaded", for: .normal)
-                streamButton.isEnabled = false
-            } else {
-                downloadButton.setTitle("Download", for: .normal)
-                streamButton.isEnabled = true
-            }
-            
-            self.currentUrlLocationLabel.text = "remote url: \(selectedAudio.url.absoluteString)"
-        }
-    }
    var freq:[Int] = [0,0,0,0,0,0,0,0,0,0]
    @IBOutlet weak var currentUrlLocationLabel: UILabel!
    @IBOutlet weak var bufferProgress: UIProgressView!
@@ -83,8 +37,20 @@ class ViewController: UIViewController {
    var isDownloading: Bool = false
    var isStreaming: Bool = false
    var beingSeeked: Bool = false
+    var loopEnabled = false
    
+    
+    var downloadId: UInt?
+    var durationId: UInt?
+    var bufferId: UInt?
+    var playingStatusId: UInt?
+    var queueId: UInt?
+    var elapsedId: UInt?
+
    var duration: Double = 0.0
+    var playbackStatus: SAPlayingStatus = .paused
+    
+    var lastPlayedAudioIndex: Int?
    
    var isPlayable: Bool = false {
        didSet {
@@ -103,84 +69,18 @@ class ViewController: UIViewController {
    override func viewDidLoad() {
        super.viewDidLoad()
        
-        SAPlayer.shared.DEBUG_MODE = true
+        SAPlayer.Downloader.allowUsingCellularData = true
+        SAPlayer.shared.HTTPHeaderFields = ["User-Agent": "foobar"]
+        
+//        SAPlayer.shared.DEBUG_MODE = true
        
        isPlayable = false
-        selectedAudio = AudioInfo(index: 0)
+        checkIfAudioDownloaded()
+        selectAudio(atIndex: 0)
        
-        addRandomModifiers()
+//        addRandomModifiers()
        
-        _ = SAPlayer.Updates.Duration.subscribe { [weak self] (url, duration) in
-            guard let self = self else { return }
-            guard url == self.selectedAudio.url || url == self.savedUrls[self.selectedAudio] else { return }
-            self.durationLabel.text = SAPlayer.prettifyTimestamp(duration)
-            self.duration = duration
-        }
-        
-        _ = SAPlayer.Updates.ElapsedTime.subscribe { [weak self] (url, position) in
-            guard let self = self else { return }
-            guard url == self.selectedAudio.url || url == self.savedUrls[self.selectedAudio] else { return }
-            
-            self.currentTimestampLabel.text = SAPlayer.prettifyTimestamp(position)
-            
-            guard self.duration != 0 else { return }
-            
-            self.scrubberSlider.value = Float(position/self.duration)
-        }
-        
-        _ = SAPlayer.Updates.AudioDownloading.subscribe { [weak self] (url, progress) in
-            guard let self = self else { return }
-            guard url == self.selectedAudio.url else { return }
-            
-            if self.isDownloading {
-                DispatchQueue.main.async {
-                    UIView.performWithoutAnimation {
-                        self.downloadButton.setTitle("Cancel \(String(format: "%.2f", (progress * 100)))%", for: .normal)
-                    }
-                }
-            }
-        }
-        
-        _ = SAPlayer.Updates.StreamingBuffer.subscribe{ [weak self] (url, buffer) in
-            guard let self = self else { return }
-            guard url == self.selectedAudio.url || url == self.savedUrls[self.selectedAudio] else { return }
-            
-            if self.duration == 0.0 { return }
-            
-            self.bufferProgress.progress = Float(buffer.bufferingProgress)
-            
-            if buffer.bufferingProgress >= 0.99 {
-                self.streamButton.isEnabled = false
-            } else {
-                self.streamButton.isEnabled = true
-            }
-            
-            self.isPlayable = buffer.isReadyForPlaying
-        }
-        
-        _ = SAPlayer.Updates.PlayingStatus.subscribe { [weak self] (url, playing) in
-            guard let self = self else { return }
-            guard url == self.selectedAudio.url || url == self.savedUrls[self.selectedAudio] else { return }
-            
-            switch playing {
-            case .playing:
-                self.isPlayable = true
-                self.playPauseButton.setTitle("Pause", for: .normal)
-                return
-            case .paused:
-                self.isPlayable = true
-                self.playPauseButton.setTitle("Play", for: .normal)
-                return
-            case .buffering:
-                self.isPlayable = false
-                self.playPauseButton.setTitle("Loading", for: .normal)
-                return
-            case .ended:
-                self.isPlayable = false
-                self.playPauseButton.setTitle("Done", for: .normal)
-                return
-            }
-        }
+        subscribeToChanges()
    }
    
    func addRandomModifiers() {
@@ -207,12 +107,148 @@ class ViewController: UIViewController {
    @IBAction func audioSelected(_ sender: Any) {
        let selected = audioSelector.selectedSegmentIndex
        
-        selectedAudio = AudioInfo(index: selected)
+        selectAudio(atIndex: selected)
+    }
+    
+    func selectAudio(atIndex i: Int) {
+        selectedAudio.setIndex(i)
        
-        SAPlayer.shared.mediaInfo = SALockScreenInfo(title: selectedAudio.title, artist: selectedAudio.artist, artwork: UIImage(), releaseDate: selectedAudio.releaseDate)
+        if selectedAudio.savedUrl != nil {
+            downloadButton.setTitle("Delete downloaded", for: .normal)
+            streamButton.isEnabled = false
+        } else {
+            downloadButton.setTitle("Download", for: .normal)
+            streamButton.isEnabled = true
+        }
+        
+        if let savedUrl = selectedAudio.savedUrl {
+            self.currentUrlLocationLabel.text = "saved url: \(savedUrl.absoluteString)"
+        } else {
+            self.currentUrlLocationLabel.text = "remote url: \(selectedAudio.url.absoluteString)"
+        }
        
        //        if let savedUrl = savedUrls[selectedAudio] {}
+        scrubberSlider.value = 0
+        bufferProgress.progress = 0
+        
+//        unsubscribeFromChanges()
+//        subscribeToChanges()
+        
+        SAPlayer.shared.mediaInfo = SALockScreenInfo(title: selectedAudio.title, artist: selectedAudio.artist, albumTitle: nil, artwork: UIImage(), releaseDate: selectedAudio.releaseDate)
    }
+    
+    func checkIfAudioDownloaded() {
+        for i in 0...2 {
+            if let savedUrl = SAPlayer.Downloader.getSavedUrl(forRemoteUrl: selectedAudio.getUrl(atIndex: i)) {
+                selectedAudio.addSavedUrl(savedUrl, atIndex: i)
+            }
+        }
+    }
+    
+    func subscribeToChanges() {
+        durationId = SAPlayer.Updates.Duration.subscribe { [weak self] (url, duration) in
+            guard let self = self else { return }
+            guard url == self.selectedAudio.savedUrl || url == self.selectedAudio.url else { return }
+            self.durationLabel.text = SAPlayer.prettifyTimestamp(duration)
+            self.duration = duration
+        }
+        
+        elapsedId = SAPlayer.Updates.ElapsedTime.subscribe { [weak self] (url, position) in
+            guard let self = self else { return }
+            guard url == self.selectedAudio.savedUrl || url == self.selectedAudio.url else { return }
+            
+            self.currentTimestampLabel.text = SAPlayer.prettifyTimestamp(position)
+            
+            guard self.duration != 0 else { return }
+            
+            self.scrubberSlider.value = Float(position/self.duration)
+        }
+        
+        downloadId = SAPlayer.Updates.AudioDownloading.subscribe { [weak self] (url, progress) in
+            guard let self = self else { return }
+            guard url == self.selectedAudio.url else { return }
+            
+            if self.isDownloading {
+                DispatchQueue.main.async {
+                    UIView.performWithoutAnimation {
+                        self.downloadButton.setTitle("Cancel \(String(format: "%.2f", (progress * 100)))%", for: .normal)
+                    }
+                }
+            }
+        }
+        
+        bufferId = SAPlayer.Updates.StreamingBuffer.subscribe{ [weak self] (url, buffer) in
+            guard let self = self else { return }
+            guard url == self.selectedAudio.savedUrl || url == self.selectedAudio.url else { return }
+            
+            if self.duration == 0.0 { return }
+            
+            self.bufferProgress.progress = Float(buffer.bufferingProgress)
+            
+            if buffer.bufferingProgress >= 0.99 {
+                self.streamButton.isEnabled = false
+            } else {
+                self.streamButton.isEnabled = true
+            }
+            
+            self.isPlayable = buffer.isReadyForPlaying
+        }
+        
+        playingStatusId = SAPlayer.Updates.PlayingStatus.subscribe { [weak self] (url, playing) in
+            guard let self = self else { return }
+            guard url == self.selectedAudio.savedUrl || url == self.selectedAudio.url else { return }
+            
+            self.playbackStatus = playing
+            
+            switch playing {
+            case .playing:
+                self.isPlayable = true
+                self.playPauseButton.setTitle("Pause", for: .normal)
+                return
+            case .paused:
+                self.isPlayable = true
+                self.playPauseButton.setTitle("Play", for: .normal)
+                return
+            case .buffering:
+                self.isPlayable = false
+                self.playPauseButton.setTitle("Loading", for: .normal)
+                return
+            case .ended:
+                if !self.loopEnabled {
+                    self.isPlayable = false
+                    self.playPauseButton.setTitle("Done", for: .normal)
+                }
+                return
+            }
+        }
+        
+        queueId = SAPlayer.Updates.AudioQueue.subscribe { [weak self] key, forthcomingPlaybackUrl in
+            guard let self = self else { return }
+            /// we update the selected audio. this is a little contrived, but allows us to update outlets
+            if let indexFound = self.selectedAudio.getIndex(forURL: forthcomingPlaybackUrl) {
+                self.selectAudio(atIndex: indexFound)
+            }
+            print("💥 Received queue update 💥")
+        }
+    }
+    
+    func unsubscribeFromChanges() {
+        guard let durationId = self.durationId,
+              let elapsedId = self.elapsedId,
+              let downloadId = self.downloadId,
+              let queueId = self.queueId,
+              let bufferId = self.bufferId,
+              let playingStatusId = self.playingStatusId else { return }
+        
+        SAPlayer.Updates.Duration.unsubscribe(durationId)
+        SAPlayer.Updates.ElapsedTime.unsubscribe(elapsedId)
+        SAPlayer.Updates.AudioDownloading.unsubscribe(downloadId)
+        SAPlayer.Updates.AudioQueue.unsubscribe(queueId)
+        SAPlayer.Updates.StreamingBuffer.unsubscribe(bufferId)
+        SAPlayer.Updates.PlayingStatus.unsubscribe(playingStatusId)
+    }
+    
+    
    @IBAction func scrubberStartedSeeking(_ sender: UISlider) {
        beingSeeked = true
    }
@@ -227,9 +263,11 @@ class ViewController: UIViewController {
    @IBAction func rateChanged(_ sender: Any) {
        let speed = rateSlider.value
        rateLabel.text = "rate: \(speed)x"
-        if let node = SAPlayer.shared.audioModifiers[0] as? AVAudioUnitTimePitch {
-            node.rate = speed
-            SAPlayer.shared.playbackRateOfAudioChanged(rate: speed)
+        
+        if skipSilencesSwitch.isOn {
+            SAPlayer.Features.SkipSilences.setRateSafely(speed) // if using Skip Silences, we need use this version of setting rate to safely change the rate with the feature enabled.
+        } else {
+            SAPlayer.shared.rate = speed
        }
    }
    @IBAction func reverbChanged(_ sender: Any) {
@@ -239,11 +277,21 @@ class ViewController: UIViewController {
            node.wetDryMix = reverb
        }
    }
+    @IBAction func queueTouched(_ sender: Any) {
+        if let savedUrl = selectedAudio.savedUrl {
+            SAPlayer.shared.queueSavedAudio(withSavedUrl: savedUrl)
+        } else {
+            SAPlayer.shared.queueRemoteAudio(withRemoteUrl: selectedAudio.url)
+        }
+        
+        print("queue: \(SAPlayer.shared.audioQueued)")
+    }
    
    @IBAction func downloadTouched(_ sender: Any) {
        if !isDownloading {
            if let savedUrl = SAPlayer.Downloader.getSavedUrl(forRemoteUrl: selectedAudio.url) {
                SAPlayer.Downloader.deleteDownloaded(withSavedUrl: savedUrl)
+                selectedAudio.deleteSavedUrl()
                downloadButton.setTitle("Download", for: .normal)
                streamButton.isEnabled = true
                isDownloading = false
@@ -254,9 +302,10 @@ class ViewController: UIViewController {
                    guard let self = self else { return }
                    DispatchQueue.main.async {
                        self.currentUrlLocationLabel.text = "saved to: \(url.lastPathComponent)"
-                        self.savedUrls[self.selectedAudio] = url
+                        self.selectedAudio.addSavedUrl(url)
                        
-                        SAPlayer.shared.startSavedAudio(withSavedUrl: url)
+                        SAPlayer.shared.startSavedAudio(withSavedUrl: url, mediaInfo: self.selectedAudio.lockscreenInfo)
+                        self.lastPlayedAudioIndex = self.selectedAudio.index
                    }
                })
                streamButton.isEnabled = false
@@ -271,7 +320,13 @@ class ViewController: UIViewController {
    
    @IBAction func streamTouched(_ sender: Any) {
        if !isStreaming {
-            SAPlayer.shared.startRemoteAudio(withRemoteUrl: selectedAudio.url)
+            if selectedAudio.index == 2 { // radio
+                SAPlayer.shared.startRemoteAudio(withRemoteUrl: selectedAudio.url, bitrate: .low, mediaInfo: selectedAudio.lockscreenInfo)
+            } else {
+                SAPlayer.shared.startRemoteAudio(withRemoteUrl: selectedAudio.url, mediaInfo: selectedAudio.lockscreenInfo)
+            }
+
+            lastPlayedAudioIndex = selectedAudio.index
            streamButton.setTitle("Cancel streaming", for: .normal)
            downloadButton.isEnabled = false
            isStreaming = true
@@ -308,5 +363,36 @@ class ViewController: UIViewController {
        
    }
    
+    @IBOutlet weak var skipSilencesSwitch: UISwitch!
+    
+    @IBAction func skipSilencesSwitched(_ sender: Any) {
+        if skipSilencesSwitch.isOn {
+            _ = SAPlayer.Features.SkipSilences.enable()
+        } else {
+            _ = SAPlayer.Features.SkipSilences.disable()
+        }
+    }
+    @IBOutlet weak var sleepSwitch: UISwitch!
+    
+    @IBAction func sleepSwitched(_ sender: Any) {
+        if sleepSwitch.isOn {
+            _ = SAPlayer.Features.SleepTimer.enable(afterDelay: 5.0)
+        } else {
+            _ = SAPlayer.Features.SleepTimer.disable()
+        }
+    }
+    
+    @IBOutlet weak var loopSwitch: UISwitch!
+    
+    @IBAction func loopSwitched(_ sender: Any) {
+        loopEnabled = loopSwitch.isOn
+        
+        if loopSwitch.isOn {
+            SAPlayer.Features.Loop.enable()
+        } else {
+            SAPlayer.Features.Loop.disable()
+        }
+        
+    }
 }

@@ -0,0 +1,30 @@
+// swift-tools-version:5.0
+// The swift-tools-version declares the minimum version of Swift required to build this package.
+
+import PackageDescription
+
+let package = Package(
+    name: "SwiftAudioPlayer",
+    platforms: [
+        .iOS(.v10), .tvOS(.v10)
+    ],
+    products: [
+        // Products define the executables and libraries a package produces, and make them visible to other packages.
+        .library(
+            name: "SwiftAudioPlayer",
+            targets: ["SwiftAudioPlayer"])
+    ],
+    dependencies: [
+        // Dependencies declare other packages that this package depends on.
+        // .package(url: /* package url */, from: "1.0.0"),
+    ],
+    targets: [
+        // Targets are the basic building blocks of a package. A target can define a module or a test suite.
+        // Targets can depend on other targets in this package, and on products in packages this package depends on.
+        .target(
+            name: "SwiftAudioPlayer",
+            path: "Source"
+        )
+    ],
+    swiftLanguageVersions: [.v5]
+)
@@ -10,6 +10,23 @@ This player was built for [podcasting](https://chameleonpodcast.com/). We origin

 Thus, using [AudioToolbox](https://developer.apple.com/documentation/audiotoolbox), we are able to stream audio and convert the downloaded data into usable data for the AVAudioEngine to play. For an overview of our solution check out our [blog post](https://medium.com/chameleon-podcast/creating-an-advanced-streaming-audio-engine-for-ios-9fbc7aef4115).

+### Basic Features
+
+1. Realtime audio manipulation that includes going up to 10x speed, using [equalizers and other manipulations](https://developer.apple.com/documentation/avfaudio/avaudiouniteq)
+1. Stream online audio using AVAudioEngine
+1. Stream radio
+1. Play locally saved audio with the same API
+1. Download audio
+1. Queue up downloaded and streamed audio for autoplay
+1. Uses only 1-2% CPU for optimal performance for the rest of your app
+1. You're able to install taps and any other AVAudioEngine features to do cool things like skipping silences
+
+### Special Features
+These are community supported audio manipulation features using this audio engine. You can implement your own version of these features and you can look at [SAPlayerFeatures](https://github.com/tanhakabir/SwiftAudioPlayer/blob/master/Source/SAPlayerFeatures.swift) to learn how they were implemented using the library.
+1. Skip silences in audio
+1. Sleep timer to stop playing audio after a delay
+1. Loop audio playback for both streamed and saved audio
+
 ### Requirements

 iOS 10.0 and higher.
@@ -19,7 +36,7 @@ iOS 10.0 and higher.
 ### Running the Example Project

 1. Clone repo
-2. CD to directory
+2. CD to the `Example` folder where the Example app lives
 3. Run `pod install` in terminal
 4. Build and run

@@ -34,6 +51,11 @@ pod 'SwiftAudioPlayer'

 ### Usage

+Import the player at the top:
+```swift
+import SwiftAudioPlayer
+```
+
 **Important:** For app in background downloading please refer to [note](#important-step-for-background-downloads).

 To play remote audio:
@@ -68,7 +90,7 @@ override func viewDidLoad() {
    }
 }
 ```
-Look at the [Updates](#SAPlayer.Updates) section to see usage details and other updates to follow.
+Look at the [Updates](#saplayerupdates) section to see usage details and other updates to follow.


 For realtime audio manipulations, [AVAudioUnit](https://developer.apple.com/documentation/avfoundation/avaudiounit) nodes are used. For example to adjust the reverb through a slider in the UI:
@@ -93,18 +115,12 @@ For a more detailed explanation on usage, look at the [Realtime Audio Manipulati

 For more details and specifics look at the [API documentation](#api-in-detail) below.

+
 ## Contact

-### Issues
+### Issues or questions

-Submit any issues or requests [on the Github repo](https://github.com/tanhakabir/SwiftAudioPlayer/issues).
-
-### Any questions?
-
-Feel free to reach out to either of us:
-
-[tanhakabir](https://github.com/tanhakabir), tanhakabir.ca@gmail.com
-[JonMercer](https://github.com/JonMercer), mercer.jon@gmail.com
+Submit any issues, requests, and questions [on the Github repo](https://github.com/tanhakabir/SwiftAudioPlayer/issues).

 ### License

@@ -118,13 +134,17 @@ SwiftAudioPlayer is available under the MIT license. See the LICENSE file for mo

 Access the player and all of its fields and functions through `SAPlayer.shared`.

+### Supported file types
+
+Known supported file types are `.mp3` and `.wav`.
+
 ### Playing Audio (Basic Commands)

 To set up player with audio to play, use either: 
 * `startSavedAudio(withSavedUrl url: URL, mediaInfo: SALockScreenInfo?)` to play audio that is saved on the device.
-* `startRemoteAudio(withRemoteUrl url: URL, mediaInfo: SALockScreenInfo?)` to play audio streamed from a remote location.
+* `startRemoteAudio(withRemoteUrl url: URL, bitrate: SAPlayerBitrate, mediaInfo: SALockScreenInfo?)` to play audio streamed from a remote location.

-Both of these expect a URL of the location of the audio and an optional media information to display on the lockscreen. 
+Both of these expect a URL of the location of the audio and an optional media information to display on the lockscreen.  For streamed audio you can optionally set the bitrate to be `.high` or `.low`. High is more performant but won't work well for radio streams; for radio streams you should use low. The default bitrate if you don't set it is `.high`.

 For streaming remote audio, subscribe to `SAPlayer.Updates.StreamingBuffer` for updates on streaming progress.

@@ -138,6 +158,16 @@ skipForward()
 skipBackwards()
 ```

+### Queuing Audio for Autoplay
+
+You can queue either remote or locally saved audio to be played automatically next. 
+
+To queue:
+```swift
+SAPlayer.shared.queueSavedAudio(withSavedUrl: C://random_folder/audio.mp3) // or
+SAPlayer.shared.queueRemoteAudio(withRemoteUrl: https://randomwebsite.com/audio.mp3)
+```
+
 #### Important

 The engine can handle audio manipulations like speed, pitch, effects, etc. To do this, nodes for effects must be finalized before initialize is called. Look at [audio manipulation documentation](#realtime-audio-manipulation) for more information.
@@ -194,6 +224,12 @@ And use the following to stop any active or prevent future downloads of the corr
 func cancelDownload(withRemoteUrl url: URL)
 ```

+By default downloading will be allowed on cellular data. If you would like to turn this off set:
+```swift
+SAPlayer.Downloader.allowUsingCellularData = false
+```
+You can also retrieve what preference you have set for cellular downloads through `allowUsingCellularData`.
+
 ### Manage Downloaded

 Use the following to manage downloaded audio files.
@@ -0,0 +1,32 @@
+//
+//  AudioQueueDirector.swift
+//  SwiftAudioPlayer
+//
+//  Created by Joe Williams on 3/10/21.
+//
+
+import Foundation
+
+class AudioQueueDirector {
+    static let shared = AudioQueueDirector()
+    var closures: DirectorThreadSafeClosures<URL> = DirectorThreadSafeClosures()
+    private init() {}
+
+    func create() {}
+
+    func clear() {
+        closures.clear()
+    }
+
+    func attach(closure: @escaping (Key, URL) throws -> Void) -> UInt {
+        return closures.attach(closure: closure)
+    }
+
+    func detach(withID id: UInt) {
+        closures.detach(id: id)
+    }
+    
+    func changeInQueue(_ key: Key, url: URL) {
+        closures.broadcast(key: key, payload: url)
+    }
+}
@@ -0,0 +1,53 @@
+//
+//  StreamingDownloadDirector.swift
+//  SwiftAudioPlayer
+//
+//  Created by Tanha Kabir on 4/16/21.
+//
+//  Permission is hereby granted, free of charge, to any person obtaining a copy
+//  of this software and associated documentation files (the "Software"), to deal
+//  in the Software without restriction, including without limitation the rights
+//  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+//  copies of the Software, and to permit persons to whom the Software is
+//  furnished to do so, subject to the following conditions:
+//
+//  The above copyright notice and this permission notice shall be included in
+//  all copies or substantial portions of the Software.
+//
+//  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+//  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+//  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+//  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+//  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+//  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+//  THE SOFTWARE.
+
+import Foundation
+
+class StreamingDownloadDirector {
+    static let shared = StreamingDownloadDirector()
+    
+    var closures: DirectorThreadSafeClosures<Double> = DirectorThreadSafeClosures()
+    
+    private init() {}
+    
+    func create() {}
+    
+    func clear() {
+        closures.clear()
+    }
+    
+    func attach(closure: @escaping (Key, Double) throws -> Void) -> UInt {
+        return closures.attach(closure: closure)
+    }
+    
+    func detach(withID id: UInt) {
+        closures.detach(id: id)
+    }
+}
+
+extension StreamingDownloadDirector {
+    func didUpdate(_ key: Key, networkStreamProgress: Double) {
+        closures.broadcast(key: key, payload: networkStreamProgress)
+    }
+}
@@ -69,12 +69,11 @@ class AudioDiskEngine: AudioEngine {
            Log.monitor("Could not load downloaded file with url: \(url)")
        }
        
-        
-        Timer.scheduledTimer(withTimeInterval: 0.2, repeats: true) { [weak self] (timer: Timer) in
-            guard let _ = self else { return }
-            self?.timer = timer
-            self?.updateIsPlaying()
-            self?.updateNeedle()
+        doRepeatedly(timeInterval: 0.2) { [weak self] in
+            guard let self = self else { return }
+            
+            self.updateIsPlaying()
+            self.updateNeedle()
        }
        
        scheduleAudioFile()
@@ -27,7 +27,8 @@ import Foundation
 import AVFoundation

 protocol AudioEngineProtocol {
-    var engine: AVAudioEngine { get set }
+    var key: Key { get }
+    var engine: AVAudioEngine! { get }
    func play()
    func pause()
    func seek(toNeedle needle: Needle)
@@ -35,18 +36,16 @@ protocol AudioEngineProtocol {
 }

 protocol AudioEngineDelegate: AnyObject {
-    func didEndPlaying() //for auto play
    func didError()
 }

 class AudioEngine: AudioEngineProtocol {
    weak var delegate:AudioEngineDelegate?
-    let key:Key
+    var key:Key
    
-    var engine = AVAudioEngine()
-    let playerNode = AVAudioPlayerNode()
-    
-    var timer: Timer?
+    var engine: AVAudioEngine!
+    var playerNode: AVAudioPlayerNode!
+    private var engineInvalidated: Bool = false
    
    static let defaultEngineAudioFormat: AVAudioFormat = AVAudioFormat(commonFormat: .pcmFormatFloat32, sampleRate: 44100, channels: 2, interleaved: false)!
    
@@ -77,11 +76,7 @@ class AudioEngine: AudioEngineProtocol {
            guard playingStatus != oldValue, let status = playingStatus else {
                return
            }
-            
-            if status == .ended {
-                delegate?.didEndPlaying()
-            }
-            
+ 
            AudioClockDirector.shared.audioPlayingStatusWasChanged(key, status: status)
        }
    }
@@ -108,53 +103,91 @@ class AudioEngine: AudioEngineProtocol {
            AudioClockDirector.shared.changeInAudioBuffered(key, buffered: bufferedSeconds)
        }
    }
+
+    private var audioModifiers: [AVAudioUnit]?
    
    init(url: AudioURL, delegate:AudioEngineDelegate?, engineAudioFormat: AVAudioFormat) {
        self.key = url.key
        self.delegate = delegate
        
+        engine = AVAudioEngine()
+        playerNode = AVAudioPlayerNode()
+        
+        initHelper(engineAudioFormat)
+    }
+    
+    func initHelper(_ engineAudioFormat: AVAudioFormat) {
        engine.attach(playerNode)
-        
-        for node in SAPlayer.shared.audioModifiers {
-            engine.attach(node)
-        }
-        
-        if SAPlayer.shared.audioModifiers.count > 0 {
-            var i = 0
-            
-            let node = SAPlayer.shared.audioModifiers[i]
-            engine.connect(playerNode, to: node, format: engineAudioFormat)
-            
-            i += 1
-            
-            while i < SAPlayer.shared.audioModifiers.count {
-                let lastNode = SAPlayer.shared.audioModifiers[i - 1]
-                let currNode = SAPlayer.shared.audioModifiers[i]
-                
-                engine.connect(lastNode, to: currNode, format: engineAudioFormat)
-                i += 1
-            }
-            
-            let finalNode = SAPlayer.shared.audioModifiers[SAPlayer.shared.audioModifiers.count - 1]
-            
-            engine.connect(finalNode, to: engine.mainMixerNode, format: engineAudioFormat)
-        } else {
+        audioModifiers = SAPlayer.shared.audioModifiers
+
+        defer { engine.prepare() }
+
+        guard let audioModifiers = audioModifiers, audioModifiers.count > 0 else {
            engine.connect(playerNode, to: engine.mainMixerNode, format: engineAudioFormat)
+            return
        }
        
-        engine.prepare()
+        audioModifiers.forEach { engine.attach($0) }
+        
+        var i = 0
+
+        let node = audioModifiers[i]
+        engine.connect(playerNode, to: node, format: engineAudioFormat)
+
+        i += 1
+
+        while i < audioModifiers.count {
+            let lastNode = audioModifiers[i - 1]
+            let currNode = audioModifiers[i]
+
+            engine.connect(lastNode, to: currNode, format: engineAudioFormat)
+            i += 1
+        }
+
+        let finalNode = audioModifiers[audioModifiers.count - 1]
+
+        engine.connect(finalNode, to: engine.mainMixerNode, format: engineAudioFormat)
    }
    
    deinit {
-        timer?.invalidate()
        if state == .resumed {
+            playerNode.stop()
            engine.stop()
        }
+        
+        engine.disconnectNodeInput(self.playerNode)
+        engine.detach(self.playerNode)
+        
+        engine = nil
+        playerNode = nil
+        Log.info("deinit AVAudioEngine for \(key)")
+    }
+    
+    func doRepeatedly(timeInterval: Double, _ closure: @escaping () -> ()) {
+        // A common error in AVAudioEngine is 'required condition is false: nil == owningEngine || GetEngine() == owningEngine'
+        // where there can only be one instance of engine running at a time and if there is already one when trying to start
+        // a new one then this error will be thrown.
+        
+        // To handle this error we need to make sure we properly dispose of the engine when done using. In the case of timers, a
+        // repeating timer will maintain a strong reference to the body even if you state that you wanted a weak reference to self
+        // to mitigate this for repeating timers, you can either call timer.invalidate() properly or don't use repeat block timers.
+        // To be in better control of references and to mitigate any unforeseen issues, I decided to implement a recurisive version
+        // of the repeat block timer so I'm in full control of when to invalidate.
+        
+        Timer.scheduledTimer(withTimeInterval: timeInterval, repeats: false) { [weak self] (timer: Timer) in
+            guard let self = self else { return }
+            guard !self.engineInvalidated else {
+                self.delegate = nil
+                return
+            }
+            closure()
+            self.doRepeatedly(timeInterval: timeInterval, closure)
+        }
    }
    
    func updateIsPlaying() {
        if !bufferedSeconds.isPlayable {
-            if bufferedSeconds.bufferingProgress > 0.999 {
+            if bufferedSeconds.reachedEndOfAudio(needle: needle) {
                playingStatus = .ended
            } else {
                playingStatus = .buffering
@@ -168,7 +201,7 @@ class AudioEngine: AudioEngineProtocol {
    
    func play() {
        // https://stackoverflow.com/questions/36754934/update-mpremotecommandcenter-play-pause-button
-        if !engine.isRunning {
+        if !(engine.isRunning) {
            do {
                try engine.start()
                
@@ -199,6 +232,12 @@ class AudioEngine: AudioEngineProtocol {
    }
    
    func invalidate() {
-        
+        engineInvalidated = true
+        playerNode.stop()
+        engine.stop()
+
+        if let audioModifiers = audioModifiers, audioModifiers.count > 0 {
+            audioModifiers.forEach { engine.detach($0) }
+        }
    }
 }
@@ -59,26 +59,33 @@ class AudioStreamEngine: AudioEngine {
    //Constants
    private let MAX_POLL_BUFFER_COUNT = 300 //Having one buffer in engine at a time is choppy.
    private let MIN_BUFFERS_TO_BE_PLAYABLE = 1
-    private let PCM_BUFFER_SIZE: AVAudioFrameCount = 8192
+    private var PCM_BUFFER_SIZE: AVAudioFrameCount = 8192
    
-    private let queue = DispatchQueue(label: "SwiftAudioPlayer.engine", qos: .userInitiated)
+    private let queue = DispatchQueue(label: "SwiftAudioPlayer.StreamEngine", qos: .userInitiated)
    
    //From init
    private var converter: AudioConvertable!
    
    //Fields
    private var currentTimeOffset: TimeInterval = 0
+    private var streamChangeListenerId: UInt?
    
    private var numberOfBuffersScheduledInTotal = 0 {
        didSet {
            Log.debug("number of buffers scheduled in total: \(numberOfBuffersScheduledInTotal)")
            if numberOfBuffersScheduledInTotal == 0 {
+                if playingStatus == .playing { wasPlaying = true }
                pause()
                //                delegate?.didError()
                // TODO: we should not have an error here. We should instead have the throttler
                // propegate when it doesn't enough buffers while they were playing
                // TODO: "Make this a legitimate warning to user about needing more data from stream"
            }
+            
+            if numberOfBuffersScheduledInTotal > MIN_BUFFERS_TO_BE_PLAYABLE && wasPlaying {
+                wasPlaying = false
+                play()
+            }
        }
    }
    
@@ -133,28 +140,55 @@ class AudioStreamEngine: AudioEngine {
        }
    }
    
-    init(withRemoteUrl url: AudioURL, delegate:AudioEngineDelegate?) {
+    init(withRemoteUrl url: AudioURL, delegate:AudioEngineDelegate?, bitrate: SAPlayerBitrate) {
        Log.info(url)
        super.init(url: url, delegate: delegate, engineAudioFormat: AudioEngine.defaultEngineAudioFormat)
+        
+        switch bitrate {
+        case .high:
+            PCM_BUFFER_SIZE = 8192
+        case .low:
+            PCM_BUFFER_SIZE = 4096
+        }
+        
        do {
-            converter = try AudioConverter(withRemoteUrl: url, toEngineAudioFormat: AudioEngine.defaultEngineAudioFormat)
+            converter = try AudioConverter(withRemoteUrl: url, toEngineAudioFormat: AudioEngine.defaultEngineAudioFormat, withPCMBufferSize: PCM_BUFFER_SIZE)
        } catch {
            delegate?.didError()
        }
        
+        streamChangeListenerId = StreamingDownloadDirector.shared.attach { [weak self] (key, progress) in
+            guard let self = self else { return }
+            guard key == url.key else { return }
+
+            // polling for buffers when we receive data. This won't be throttled on fresh new audio or seeked audio but in all other cases it most likely will be throttled
+            self.pollForNextBuffer() //  no buffer updates because thread issues if I try to update buffer status in streaming listener
+        }
+        
        
        let timeInterval = 1 / (converter.engineAudioFormat.sampleRate / Double(PCM_BUFFER_SIZE))
        
-        Timer.scheduledTimer(withTimeInterval: timeInterval / 32, repeats: true) { [weak self] (timer: Timer) in
-            self?.timer = timer
-            self?.pollForNextBuffer()
-            self?.updateNetworkBufferRange()
-            self?.updateNeedle()
-            self?.updateIsPlaying()
-            self?.updateDuration()
+        doRepeatedly(timeInterval: timeInterval) { [weak self] in
+            guard let self = self else { return }
+            
+            self.repeatedUpdates()
        }
    }
    
+    deinit {
+        if let id = streamChangeListenerId {
+            StreamingDownloadDirector.shared.detach(withID: id)
+        }
+    }
+    
+    private func repeatedUpdates() {
+        self.pollForNextBuffer()
+        self.updateNetworkBufferRange() // thread issues if I try to update buffer status in streaming listener
+        self.updateNeedle()
+        self.updateIsPlaying()
+        self.updateDuration()
+    }
+    
    //MARK:- Timer loop
    
    //Called when
@@ -163,16 +197,30 @@ class AudioStreamEngine: AudioEngine {
    private func pollForNextBuffer() {
        guard shouldPollForNextBuffer else { return }
        
+        pollForNextBufferRecursive()
+    }
+    
+    private func pollForNextBufferRecursive() {
        do {
-            let nextScheduledBuffer = try converter.pullBuffer(withSize: PCM_BUFFER_SIZE)
+            var nextScheduledBuffer: AVAudioPCMBuffer! = try converter.pullBuffer()
            numberOfBuffersScheduledFromPoll += 1
            numberOfBuffersScheduledInTotal += 1
            
            Log.debug("processed buffer for engine of frame length \(nextScheduledBuffer.frameLength)")
            queue.async { [weak self] in
-                self?.playerNode.scheduleBuffer(nextScheduledBuffer) {
-                    self?.numberOfBuffersScheduledInTotal -= 1
-                    self?.pollForNextBufferRecursionHelper()
+                if #available(iOS 11.0, tvOS 11.0, *) {
+                    // to make sure the pcm buffers are properly free'd from memory we need to nil them after the player has used them
+                    self?.playerNode.scheduleBuffer(nextScheduledBuffer, completionCallbackType: .dataConsumed, completionHandler: { (_) in
+                        nextScheduledBuffer = nil
+                        self?.numberOfBuffersScheduledInTotal -= 1
+                        self?.pollForNextBufferRecursive()
+                    })
+                } else {
+                    self?.playerNode.scheduleBuffer(nextScheduledBuffer) {
+                        nextScheduledBuffer = nil
+                        self?.numberOfBuffersScheduledInTotal -= 1
+                        self?.pollForNextBufferRecursive()
+                    }
                }
            }
            
@@ -188,32 +236,6 @@ class AudioStreamEngine: AudioEngine {
        }
    }
    
-    private func pollForNextBufferRecursionHelper() {
-        do {
-            let nextScheduledBuffer = try converter.pullBuffer(withSize: PCM_BUFFER_SIZE)
-            Log.debug("processed buffer for engine of frame lengthL \(nextScheduledBuffer.frameLength)")
-            numberOfBuffersScheduledInTotal += 1
-            
-            queue.async { [weak self] in
-                self?.playerNode.scheduleBuffer(nextScheduledBuffer) {
-                    self?.numberOfBuffersScheduledInTotal -= 1
-                    self?.pollForNextBufferRecursionHelper()
-                }
-                
-            }
-            
-        } catch ConverterError.reachedEndOfFile {
-            Log.info(ConverterError.reachedEndOfFile.localizedDescription)
-        } catch ConverterError.notEnoughData {
-            shouldPollForNextBuffer = true
-            Log.debug(ConverterError.notEnoughData.localizedDescription)
-        } catch ConverterError.superConcerningShouldNeverHappen {
-            Log.error(ConverterError.superConcerningShouldNeverHappen.localizedDescription)
-        } catch {
-            Log.debug(error.localizedDescription)
-        }
-    }
-    
    private func updateNetworkBufferRange() { //for ui
        let range = converter.pollNetworkAudioAvailabilityRange()
        isPlayable = (numberOfBuffersScheduledInTotal >= MIN_BUFFERS_TO_BE_PLAYABLE && range.1 > 0) && predictedStreamDuration > 0
@@ -290,8 +312,34 @@ class AudioStreamEngine: AudioEngine {
        updateNetworkBufferRange()
    }
    
+    override func pause() {
+        queue.async { [weak self] in
+            self?.pauseHelperDispatchQueue()
+        }
+    }
+    
+    private func pauseHelperDispatchQueue() {
+        super.pause()
+    }
+    
+    override func play() {
+        queue.async { [weak self] in
+            self?.playHelperDispatchQueue()
+        }
+    }
+    
+    private func playHelperDispatchQueue() {
+        super.play()
+    }
+    
    override func invalidate() {
+        queue.sync { [weak self] in
+            self?.invalidateHelperDispatchQueue()
+            self?.converter.invalidate()
+        }
+    }
+
+    private func invalidateHelperDispatchQueue() {
        super.invalidate()
-        converter.invalidate()
    }
 }
@@ -27,74 +27,30 @@ import Foundation

 protocol AudioThrottleDelegate: AnyObject {
    func didUpdate(totalBytesExpected bytes: Int64)
-    func didUpdate(networkStreamProgress progress: Double)
-    func shouldProcess(networkData data: Data)
 }

 protocol AudioThrottleable {
    init(withRemoteUrl url: AudioURL, withDelegate delegate: AudioThrottleDelegate)
-    func tellAudioFormatFound()
-    func tellByteOffset(offset: UInt64)
+    func pullNextDataPacket(_ callback: @escaping (Data?) -> ())
    func tellSeek(offset: UInt64)
-    func tellBytesPerAudioPacket(count: UInt64)
    func pollRangeOfBytesAvailable() -> (UInt64, UInt64)
    func invalidate()
 }

 class AudioThrottler: AudioThrottleable {
-    private class NetworkDataWrapper: NSObject {
-        let startOffset: UInt
-        var data: Data
-        var alreadySent: Bool
-        var next: NetworkDataWrapper?
-        
-        var byteCount: UInt {
-            return UInt(data.count)
-        }
-        
-        var endOffset: UInt {
-            return startOffset + UInt(data.count) - 1
-        }
-        
-        init(startingOffset: UInt, data: Data) {
-            self.startOffset = startingOffset
-            self.data = data
-            self.alreadySent = false
-        }
-        
-        func containsOffset(_ offset: UInt) -> Bool {
-            return startOffset <= offset && offset <= endOffset
-        }
-        
-        func isNextSent() -> Bool {
-            return next?.alreadySent ?? false
-        }
-        
-        //FIXME: what is the offset was at the edge of the split? We will have empty data
-        func splitToRight(atOffset offset: UInt) -> NetworkDataWrapper {
-            let splitPoint:Int = Int(offset - startOffset)
-            let leftData = data.subdata(in: 0..<splitPoint)
-            let rightData = data.subdata(in: splitPoint..<data.count)
-            
-            data = leftData
-            
-            let rightWrapper:NetworkDataWrapper = NetworkDataWrapper(startingOffset: offset, data: rightData)
-            rightWrapper.next = next
-            next = rightWrapper
-            
-            return rightWrapper
-        }
-        
-        override var description: String {
-            return "startOffset:\(startOffset), endOffset:\(endOffset), dataCount:\(data.count), sent:\(alreadySent), next:\(next != nil ?"hasNext":"noNext")"
-        }
-    }
+    private let queue = DispatchQueue(label: "SwiftAudioPlayer.Throttler", qos: .userInitiated)
    
    //Init
    let url: AudioURL
    weak var delegate: AudioThrottleDelegate?
    
-    private var networkData: [NetworkDataWrapper] = []
+    private var networkData: [Data] = [] {
+        didSet {
+//            Log.test("NETWORK DATA \(networkData.count)")
+        }
+    }
+    private var lastSentDataPacketIndex = -1
+    
    var shouldThrottle = false
    var byteOffsetBecauseOfSeek: UInt = 0
    
@@ -116,131 +72,104 @@ class AudioThrottler: AudioThrottleable {
        AudioDataManager.shared.startStream(withRemoteURL: url) { [weak self] (pto: StreamProgressPTO) in
            guard let self = self else {return}
            Log.debug("received stream data of size \(pto.getData().count) and progress: \(pto.getProgress())")
-            self.delegate?.didUpdate(networkStreamProgress: pto.getProgress())
-            
+
            if let totalBytesExpected = pto.getTotalBytesExpected() {
                self.totalBytesExpected = totalBytesExpected
            }
            
-            let lastItem = self.networkData.last
-            let startoffset = lastItem == nil ? self.byteOffsetBecauseOfSeek : lastItem!.endOffset + 1
-            let wrappedNetworkData = NetworkDataWrapper(startingOffset: startoffset, data: pto.getData())
-            lastItem?.next = wrappedNetworkData
-            self.networkData.append(wrappedNetworkData)
-            
-            if !self.shouldThrottle {
-                Log.debug("sending up packet from stream untrottled at start: \(wrappedNetworkData.startOffset)")
-                //NOTE: the order here matters.
-                //We have to set to true before sending up to be processed because
-                //tellByteOffset() is ran in a separate thread than this one
-                //We got in a state where 10% of the time an episode will keep polling because
-                //the first 30 buffers have not been filled
-                wrappedNetworkData.alreadySent = true
-                delegate.shouldProcess(networkData: wrappedNetworkData.data)
-            }
-        }
-    }
-    
-    func tellAudioFormatFound() {
-        shouldThrottle = true //the above layer has enough info that we can throttle
-    }
-    
-    func tellBytesPerAudioPacket(count: UInt64) {
-        if count > largestPollingOffsetDifference {
-            largestPollingOffsetDifference = count
-        }
-    }
-    
-    func tellByteOffset(offset: UInt64) {
-        Log.debug("offset \(offset)")
-        
-        for wrappedNetworkData in networkData {
-            if wrappedNetworkData.containsOffset(UInt(offset)) {
-                Log.debug("offset: \(offset) within network packet of range: \(wrappedNetworkData.startOffset) to \(wrappedNetworkData.endOffset) is next sent: \(wrappedNetworkData.isNextSent())")
-                
-                if wrappedNetworkData.alreadySent {
-                    Log.debug("already sent offset: \(offset) within network packet of range: \(wrappedNetworkData.startOffset) to \(wrappedNetworkData.endOffset)")
-                    
-                    var bytesSent: UInt = 0
-                    var current = wrappedNetworkData
-                    
-                    // Sometimes the next data packet is smaller than a full audio chunk size, so we need to ensure we send up enough packets for the audio chunk. This prevented Issue #4 where tsreaming would randomly get stuck in a state needing more data up the chain.
-                    // https://github.com/tanhakabir/SwiftAudioPlayer/issues/4
-                    while bytesSent < largestPollingOffsetDifference {
-                        if let next = current.next {
-                            if !next.alreadySent {
-                                Log.info("Sending next network packet with range: \(next.startOffset) to \(next.endOffset), have sent \(bytesSent) bytes so far from \(largestPollingOffsetDifference) bytes")
-                                next.alreadySent = true
-                                delegate?.shouldProcess(networkData: next.data)
-                            }
-                            bytesSent += next.byteCount
-                            current = next
-                        } else {
-                            Log.debug("next package doesn't exist, bytes sent so far: \(bytesSent)")
-                            return
-                        }
-                    }
-                    
-                    return
-                }
-                
-                Log.info("Found network packet  to send with range: \(wrappedNetworkData.startOffset) to \(wrappedNetworkData.endOffset)")
-                wrappedNetworkData.alreadySent = true
-                delegate?.shouldProcess(networkData: wrappedNetworkData.data)
-                return
+            self.queue.async { [weak self] in
+                self?.networkData.append(pto.getData())
+                StreamingDownloadDirector.shared.didUpdate(url.key, networkStreamProgress: pto.getProgress())
            }
        }
    }
+
    
    func tellSeek(offset: UInt64) {
        Log.info("seek with offset: \(offset)")
        
+        self.queue.async { [weak self] in
+            self?.seekQueueHelper(offset)
+        }
+    }
+    
+    func seekQueueHelper(_ offset: UInt64) {
+        let offsetToFind = Int(offset) - Int(byteOffsetBecauseOfSeek)
+        
+        var shouldStartNewStream: Bool = false
+        
+        // if we have no data start a new stream after seek
        if networkData.count == 0 {
+            shouldStartNewStream = true
+        }
+        
+        // if what we're looking for is outside of available data, start a new stream
+        if offset < byteOffsetBecauseOfSeek || offsetToFind > networkData.sum {
+            shouldStartNewStream = true
+        }
+        
+        // we should have the data within our cache. find it and save the index for the next pull
+        if let indexOfDataContainingOffset = networkData.getIndexContainingByteOffset(offsetToFind) {
+            lastSentDataPacketIndex = indexOfDataContainingOffset - 1
+        }
+        
+        if shouldStartNewStream {
            byteOffsetBecauseOfSeek = UInt(offset)
+            lastSentDataPacketIndex = -1
            AudioDataManager.shared.seekStream(withRemoteURL: url, toByteOffset: offset)
            
            networkData = []
            return
        }
        
-        if let finalOffset = networkData.last?.endOffset, let firstOffset = networkData.first?.startOffset {
-            if offset < firstOffset || offset > finalOffset {
-                byteOffsetBecauseOfSeek = UInt(offset)
-                AudioDataManager.shared.seekStream(withRemoteURL: url, toByteOffset: offset)
-                
-                networkData = []
-                return
-            }
-        }
-        
-        for (i, d) in networkData.enumerated() {
-            if offset > d.endOffset {
-                d.alreadySent = false
-                continue
-            }
-            
-            if d.containsOffset(UInt(offset)) {
-                let wrappedData = d.splitToRight(atOffset: UInt(offset))
-                networkData.insert(wrappedData, at: i+1)
-                
-                d.alreadySent = false
-                wrappedData.alreadySent = true
-                Log.info("\(d) ::: \(wrappedData)")
-                
-                delegate?.shouldProcess(networkData: wrappedData.data)
-                return
-            }
-        }
+        Log.error("83672 Should not get here")
    }
    
    func pollRangeOfBytesAvailable() -> (UInt64, UInt64) {
-        let start = networkData.first?.startOffset ?? 0
-        let end = networkData.last?.endOffset ?? 0
+        let start = byteOffsetBecauseOfSeek
+        let end = networkData.sum + Int(byteOffsetBecauseOfSeek)
        
        return (UInt64(start), UInt64(end))
    }
    
+    func pullNextDataPacket(_ callback: @escaping (Data?) -> ()) {
+        queue.async { [weak self] in
+            guard let self = self else { return }
+            guard self.lastSentDataPacketIndex < self.networkData.count - 1 else {
+                callback(nil)
+                return
+            }
+            
+            self.lastSentDataPacketIndex += 1
+            
+            callback(self.networkData[self.lastSentDataPacketIndex])
+        }
+    }
+    
    func invalidate() {
        AudioDataManager.shared.deleteStream(withRemoteURL: url)
    }
 }
+
+extension Array where Element == Data {
+    var sum: Int {
+        get {
+            guard count > 0 else { return 0 }
+            return self.reduce(0) { $0 + $1.count }
+        }
+    }
+    
+    func getIndexContainingByteOffset(_ offset: Int) -> Int? {
+        var dataCount = 0
+        
+        for (i, data) in self.enumerated() {
+            if offset >= dataCount && offset <= dataCount + data.count {
+                return i
+            }
+            
+            dataCount += data.count
+        }
+        
+        return nil
+    }
+}
@@ -36,8 +36,8 @@ import AudioToolbox
 protocol AudioConvertable {
    var engineAudioFormat: AVAudioFormat {get}
    
-    init(withRemoteUrl url: AudioURL, toEngineAudioFormat: AVAudioFormat) throws
-    func pullBuffer(withSize size: AVAudioFrameCount) throws -> AVAudioPCMBuffer
+    init(withRemoteUrl url: AudioURL, toEngineAudioFormat: AVAudioFormat, withPCMBufferSize size: AVAudioFrameCount) throws
+    func pullBuffer() throws -> AVAudioPCMBuffer
    func pollPredictedDuration() -> Duration?
    func pollNetworkAudioAvailabilityRange() -> (Needle, Duration)
    func seek(_ needle: Needle)
@@ -70,15 +70,22 @@ class AudioConverter: AudioConvertable {
    
    //From protocol
    public var engineAudioFormat: AVAudioFormat
+    let pcmBufferSize: AVAudioFrameCount
    
    //Field
    var converter: AudioConverterRef? //set by AudioConverterNew
    var currentAudioPacketIndex: AVAudioPacketCount = 0
    
-    required init(withRemoteUrl url: AudioURL, toEngineAudioFormat: AVAudioFormat) throws {
+    // use to store reference to the allocated buffers from the converter to properly deallocate them before the next packet is being converted
+    var converterBuffer: UnsafeMutableRawPointer?
+    var converterDescriptions: UnsafeMutablePointer<AudioStreamPacketDescription>?
+    
+    required init(withRemoteUrl url: AudioURL, toEngineAudioFormat: AVAudioFormat, withPCMBufferSize size: AVAudioFrameCount) throws {
        self.engineAudioFormat = toEngineAudioFormat
+        self.pcmBufferSize = size
+        
        do {
-            parser = try AudioParser(withRemoteUrl: url, parsedFileAudioFormatCallback: {
+            parser = try AudioParser(withRemoteUrl: url, bufferSize: Int(size), parsedFileAudioFormatCallback: {
                [weak self] (fileAudioFormat: AVAudioFormat) in
                guard let strongSelf = self else { return }
                
@@ -108,17 +115,17 @@ class AudioConverter: AudioConvertable {
        }
    }
    
-    func pullBuffer(withSize size: AVAudioFrameCount) throws -> AVAudioPCMBuffer {
+    func pullBuffer() throws -> AVAudioPCMBuffer {
        guard let converter = converter else {
            Log.debug("reader_error trying to read before converter has been created")
            throw ConverterError.cannotCreatePCMBufferWithoutConverter
        }
        
-        guard let pcmBuffer = AVAudioPCMBuffer(pcmFormat: engineAudioFormat, frameCapacity: size) else {
+        guard let pcmBuffer = AVAudioPCMBuffer(pcmFormat: engineAudioFormat, frameCapacity: pcmBufferSize) else {
            Log.monitor(ConverterError.failedToCreatePCMBuffer.errorDescription as Any)
            throw ConverterError.failedToCreatePCMBuffer
        }
-        pcmBuffer.frameLength = size
+        pcmBuffer.frameLength = pcmBufferSize
        
        /**
         The whole thing is wrapped in queue.sync() because the converter listener
@@ -127,7 +134,7 @@ class AudioConverter: AudioConvertable {
         */
        return try queue.sync { () -> AVAudioPCMBuffer in
            let framesPerPacket = engineAudioFormat.streamDescription.pointee.mFramesPerPacket
-            var numberOfPacketsWeWantTheBufferToFill = size / framesPerPacket
+            var numberOfPacketsWeWantTheBufferToFill = pcmBuffer.frameLength / framesPerPacket
            
            let context = unsafeBitCast(self, to: UnsafeMutableRawPointer.self)
            let status = AudioConverterFillComplexBuffer(converter, ConverterListener, context, &numberOfPacketsWeWantTheBufferToFill, pcmBuffer.mutableAudioBufferList, nil)
@@ -83,7 +83,7 @@ public enum ConverterError: LocalizedError {
            Log.warn("Weird unexpected reader error. Should not have happened")
            return "Weird unexpected reader error. Should not have happened"
        case .cannotCreatePCMBufferWithoutConverter:
-            Log.warn("Could not create a PCM Buffer because reader does not have a converter yet")
+            Log.debug("Could not create a PCM Buffer because reader does not have a converter yet")
            return "Could not create a PCM Buffer because reader does not have a converter yet"
        case .throttleParsingBuffersForEngine:
            Log.warn("Preventing the reader from creating more PCM buffers since the player has more than 60 seconds of audio already to play")
@@ -65,6 +65,10 @@ func ConverterListener(_ converter: AudioConverterRef, _ packetCount: UnsafeMuta
        return ReaderShouldNotHappenError
    }
    
+    if let lastBuffer = selfAudioConverter.converterBuffer {
+        lastBuffer.deallocate()
+    }
+    
    // Copy data over (note we've only processing a single packet of data at a time)
    var packet = audioPacket.1
    let packetByteCount = packet.count //this is not the count of an array
@@ -75,6 +79,12 @@ func ConverterListener(_ converter: AudioConverterRef, _ packetCount: UnsafeMuta
    })
    ioData.pointee.mBuffers.mDataByteSize = UInt32(packetByteCount)
    
+    selfAudioConverter.converterBuffer = ioData.pointee.mBuffers.mData
+    
+    if let lastDescription = selfAudioConverter.converterDescriptions {
+        lastDescription.deallocate()
+    }
+    
    // Handle packet descriptions for compressed formats (MP3, AAC, etc)
    let fileFormatDescription = fileAudioFormat.streamDescription.pointee
    if fileFormatDescription.mFormatID != kAudioFormatLinearPCM {
@@ -86,6 +96,8 @@ func ConverterListener(_ converter: AudioConverterRef, _ packetCount: UnsafeMuta
        outPacketDescriptions?.pointee?.pointee.mVariableFramesInPacket = 0
    }
    
+    selfAudioConverter.converterDescriptions = outPacketDescriptions?.pointee
+    
    packetCount.pointee = 1
    
    //we've successfully given a packet to the LPCM buffer now we can process the next audio packet
@@ -53,6 +53,9 @@ import AVFoundation
 //TODO: what if user seeks beyond the data we have? What if we're done but user seeks even further than what we have

 class AudioParser: AudioParsable {
+    private var MIN_PACKETS_TO_HAVE_AVAILABLE_BEFORE_THROTTLING_PARSING = 8192  // this will be modified when we know the file format to be just enough packets to fill up 1 pcm buffer
+    private var framesPerBuffer: Int = 1
+    
    //MARK:- For OS parser class
    var parsedAudioHeaderPacketCount: UInt64 = 0
    var parsedAudioPacketDataSize: UInt64 = 0
@@ -61,8 +64,8 @@ class AudioParser: AudioParsable {
    public var fileAudioFormat: AVAudioFormat? {
        didSet {
            if let format = fileAudioFormat, oldValue == nil {
+                MIN_PACKETS_TO_HAVE_AVAILABLE_BEFORE_THROTTLING_PARSING = framesPerBuffer/Int(format.streamDescription.pointee.mFramesPerPacket)
                parsedFileAudioFormatCallback(format)
-                throttler.tellAudioFormatFound()
            }
        }
    }
@@ -100,25 +103,23 @@ class AudioParser: AudioParsable {
        return predictedCount
    }
    
-    var sumOfParsedAudioBytes:UInt32 = 0 {
-        didSet {
-            if let byteCount = averageBytesPerPacket {
-                throttler.tellBytesPerAudioPacket(count: UInt64(byteCount))
-            }
-        }
-    }
-    
+    var sumOfParsedAudioBytes:UInt32 = 0
    var numberOfPacketsParsed:UInt32 = 0
-    var audioPackets: [(AudioStreamPacketDescription?,Data)] = [] { 
+    var audioPackets: [(AudioStreamPacketDescription?,Data)] = [] {
        didSet {
            if let audioPacketByteSize = audioPackets.last?.0?.mDataByteSize {
                sumOfParsedAudioBytes += audioPacketByteSize
-                numberOfPacketsParsed += 1
+            } else if let audioPacketByteSize = audioPackets.last?.1.count { // for uncompressed audio there are no descriptors to say how many bytes of audio are in this packet so we approximate by data size
+                sumOfParsedAudioBytes += UInt32(audioPacketByteSize)
            }
            
-            //TODO: duration will not work with WAV or AIFF
+            numberOfPacketsParsed += 1
+            
+            //TODO: duration will not be accurate with WAV or AIFF
        }
    }
+    private let lockQueue = DispatchQueue(label: "SwiftAudioPlayer.Parser.packets.lock")
+    var lastSentAudioPacketIndex = -1
    
    /**
     Audio packets varry in size. The first one parsed in a batch of audio
@@ -145,12 +146,30 @@ class AudioParser: AudioParsable {
        return audioPackets.count == totalPredictedPacketCount
    }
    
+    var streamChangeListenerId: UInt?
    
-    init(withRemoteUrl url: AudioURL, parsedFileAudioFormatCallback: @escaping(AVAudioFormat) -> ()) throws {
+    init(withRemoteUrl url: AudioURL, bufferSize: Int,  parsedFileAudioFormatCallback: @escaping(AVAudioFormat) -> ()) throws {
        self.url = url
+        self.framesPerBuffer = bufferSize
        self.parsedFileAudioFormatCallback = parsedFileAudioFormatCallback
+        
        self.throttler = AudioThrottler(withRemoteUrl: url, withDelegate: self)
        
+        streamChangeListenerId = StreamingDownloadDirector.shared.attach { [weak self] (key, progress) in
+            guard let self = self else { return }
+            guard key == url.key else { return }
+            self.networkProgress = progress
+            
+            // initially parse a bunch of packets
+            self.lockQueue.sync {
+                if self.fileAudioFormat == nil {
+                    self.processNextDataPacket()
+                } else if self.audioPackets.count - self.lastSentAudioPacketIndex < self.MIN_PACKETS_TO_HAVE_AVAILABLE_BEFORE_THROTTLING_PARSING {
+                    self.processNextDataPacket()
+                }
+            }
+        }
+        
        let context = unsafeBitCast(self, to: UnsafeMutableRawPointer.self)
        //Open the stream and when we call parse data is fed into this stream
        guard AudioFileStreamOpen(context, ParserPropertyListener, ParserPacketListener, kAudioFileMP3Type, &streamID) == noErr else {
@@ -158,33 +177,61 @@ class AudioParser: AudioParsable {
        }
    }
    
-    func pullPacket(atIndex index: AVAudioPacketCount) throws -> (AudioStreamPacketDescription?, Data) {
-        if let offset = getOffset(fromPacketIndex: index) {
-            throttler.tellByteOffset(offset: offset)
+    deinit {
+        if let id = streamChangeListenerId {
+            StreamingDownloadDirector.shared.detach(withID: id)
        }
+    }
+    
+    func pullPacket(atIndex index: AVAudioPacketCount) throws -> (AudioStreamPacketDescription?, Data) {
+        determineIfMoreDataNeedsToBeParsed(index: index)
        
        // Check if we've reached the end of the packets. We have two scenarios:
        //     1. We've reached the end of the packet data and the file has been completely parsed
        //     2. We've reached the end of the data we currently have downloaded, but not the file
        let packetIndex = index - indexSeekOffset
-        let isEndOfData = packetIndex >= audioPackets.count
-        if isEndOfData {
-            if isParsingComplete {
-                throw ParserError.readerAskingBeyondEndOfFile
-            } else {
-                Log.debug("Tried to pull packet at index: \(packetIndex) when only have: \(audioPackets.count), we predict \(totalPredictedPacketCount) in total")
-                throw ParserError.notEnoughDataForReader
+        
+        var exception: ParserError? = nil
+        var packet: (AudioStreamPacketDescription?, Data) = (nil, Data())
+        lockQueue.sync {
+            if packetIndex >= self.audioPackets.count {
+                if isParsingComplete {
+                    exception = ParserError.readerAskingBeyondEndOfFile
+                    return
+                } else {
+                    Log.debug("Tried to pull packet at index: \(packetIndex) when only have: \(self.audioPackets.count), we predict \(self.totalPredictedPacketCount) in total")
+                    exception = ParserError.notEnoughDataForReader
+                    return
+                }
+            }
+            
+            lastSentAudioPacketIndex = Int(packetIndex)
+            packet = audioPackets[Int(packetIndex)]
+        }
+        if let exception = exception {
+            throw exception
+        } else {
+            return packet
+        }
+    }
+    
+    private func determineIfMoreDataNeedsToBeParsed(index: AVAudioPacketCount) {
+        lockQueue.sync {
+            if index > self.audioPackets.count - self.MIN_PACKETS_TO_HAVE_AVAILABLE_BEFORE_THROTTLING_PARSING {
+                self.processNextDataPacket()
            }
        }
-        
-        return audioPackets[Int(packetIndex)]
    }
    
    func tellSeek(toIndex index: AVAudioPacketCount) {
        //Already within the processed audio packets. Ignore
-        if indexSeekOffset <= index && index < audioPackets.count + Int(indexSeekOffset) {
-            return
+        var isIndexValid: Bool = true
+        lockQueue.sync {
+            if self.indexSeekOffset <= index && index < self.audioPackets.count + Int(self.indexSeekOffset) {
+                isIndexValid = false
+            }
        }
+        guard isIndexValid else { return }
        
        guard let byteOffset = getOffset(fromPacketIndex: index) else {
            return
@@ -196,15 +243,18 @@ class AudioParser: AudioParsable {
        // NOTE: Order matters. Need to prevent appending to the array before we clean it. Just in case
        // then we tell the throttler to send us appropriate packet
        shouldPreventPacketFromFillingUp = true
-        audioPackets = []
+        lockQueue.sync {
+            self.audioPackets = []
+        }
        
        throttler.tellSeek(offset: byteOffset)
+        self.processNextDataPacket()
    }
    
    private func getOffset(fromPacketIndex index: AVAudioPacketCount) -> UInt64? {
        //Clear current buffer if we have audio format
        guard fileAudioFormat != nil, let bytesPerPacket = self.averageBytesPerPacket else {
-            Log.error("should not get here")
+            Log.error("should not get here \(String(describing: fileAudioFormat)) and \(String(describing: self.averageBytesPerPacket))")
            return nil
        }
        
@@ -251,6 +301,12 @@ class AudioParser: AudioParsable {
        return Needle(TimeInterval(frame)/TimeInterval(frameCount)*duration)
    }
    
+    func append(description: AudioStreamPacketDescription?, data: Data) {
+        lockQueue.sync {
+            self.audioPackets.append((description, data))
+        }
+    }
+    
    func invalidate() {
        throttler.invalidate()
        
@@ -278,6 +334,32 @@ class AudioParser: AudioParsable {
        
    }
    
+    private func processNextDataPacket() {
+        throttler.pullNextDataPacket { [weak self] (d) in
+            guard let self = self else { return }
+            guard let data = d else { return }
+            
+            self.lockQueue.sync {
+                Log.debug("processing data count: \(data.count) :: already had \(self.audioPackets.count) audio packets")
+            }
+            self.shouldPreventPacketFromFillingUp = false
+            do {
+                let sID = self.streamID!
+                let dataSize = data.count
+                
+                _ = try data.accessBytes({ (bytes: UnsafePointer<UInt8>) in
+                    let result:OSStatus = AudioFileStreamParseBytes(sID, UInt32(dataSize), bytes, [])
+                    guard result == noErr else {
+                        Log.monitor(ParserError.failedToParseBytes(result).errorDescription as Any)
+                        throw ParserError.failedToParseBytes(result)
+                    }
+                })
+            } catch {
+                Log.monitor(error.localizedDescription)
+            }
+        }
+    }
+    
 }

 //MARK:- AudioThrottleDelegate
@@ -285,27 +367,4 @@ extension AudioParser: AudioThrottleDelegate {
    func didUpdate(totalBytesExpected bytes: Int64) {
        expectedFileSizeInBytes = UInt64(bytes)
    }
-    
-    func didUpdate(networkStreamProgress progress: Double) {
-        networkProgress = progress
-    }
-    
-    func shouldProcess(networkData data: Data) {
-        Log.debug("processing data count: \(data.count) :: already had \(audioPackets.count) audio packets")
-        self.shouldPreventPacketFromFillingUp = false
-        do {
-            let sID = self.streamID!
-            let dataSize = data.count
-            
-            _ = try data.accessBytes({ (bytes: UnsafePointer<UInt8>) in
-                let result:OSStatus = AudioFileStreamParseBytes(sID, UInt32(dataSize), bytes, [])
-                guard result == noErr else {
-                    Log.monitor(ParserError.failedToParseBytes(result).errorDescription as Any)
-                    throw ParserError.failedToParseBytes(result)
-                }
-            })
-        } catch {
-            Log.monitor(error.localizedDescription)
-        }
-    }
 }
@@ -3,7 +3,7 @@
 //  SwiftAudioPlayer
 //
 //  Created by Tanha Kabir on 2019-01-29.
-//  Copyright © 2019 Tanha Kabir, Jon Mercer
+//  Copyright © 2019 Tanha Kabir, Jon Mercer, Moy Inzunza
 //
 //  This file was modified and adapted from https://github.com/syedhali/AudioStreamer
 //  which was released under Apache License 2.0. Apache License 2.0 requires explicit
@@ -32,15 +32,23 @@
 import Foundation
 import AVFoundation

-func ParserPacketListener(_ context: UnsafeMutableRawPointer, _ byteCount: UInt32, _ packetCount: UInt32, _ streamData: UnsafeRawPointer, _ packetDescriptions: UnsafeMutablePointer<AudioStreamPacketDescription>) {
+#if swift(>=5.3)
+func ParserPacketListener (_ context: UnsafeMutableRawPointer, _ byteCount: UInt32, _ packetCount: UInt32, _ streamData: UnsafeRawPointer, _ packetDescriptions: UnsafeMutablePointer<AudioStreamPacketDescription>?) {
+    parserPacket(context, byteCount, packetCount, streamData, packetDescriptions)
+}
+
+#else
+func ParserPacketListener (_ context: UnsafeMutableRawPointer, _ byteCount: UInt32, _ packetCount: UInt32, _ streamData: UnsafeRawPointer, _ packetDescriptions: UnsafeMutablePointer<AudioStreamPacketDescription>) {
+    parserPacket(context, byteCount, packetCount, streamData, packetDescriptions)
+}
+#endif
+
+func parserPacket(_ context: UnsafeMutableRawPointer, _ byteCount: UInt32, _ packetCount: UInt32, _ streamData: UnsafeRawPointer, _ packetDescriptions: UnsafeMutablePointer<AudioStreamPacketDescription>?){
+    
    let selfAudioParser = Unmanaged<AudioParser>.fromOpaque(context).takeUnretainedValue()
    
-    //bug in core audio where this could be nil
-    let packetDescriptionOrNil: UnsafeMutablePointer<AudioStreamPacketDescription>? = packetDescriptions
-    let isCompressed = packetDescriptionOrNil != nil
-    
    guard let fileAudioFormat = selfAudioParser.fileAudioFormat else {
-        Log.monitor("shouldnot have reached packet listener without a data format")
+        Log.monitor("should not have reached packet listener without a data format")
        return
    }
    
@@ -50,22 +58,25 @@ func ParserPacketListener(_ context: UnsafeMutableRawPointer, _ byteCount: UInt3
    }
    
    //TODO refactor this after we get it working
-    if isCompressed {
+    if let compressedPacketDescriptions = packetDescriptions {  // is compressed audio (.mp3)
+        Log.debug("compressed audio")
        for i in 0 ..< Int(packetCount) {
-            let audioPacketDescription = packetDescriptions[i]
+            let audioPacketDescription = compressedPacketDescriptions[i]
            let audioPacketStart = Int(audioPacketDescription.mStartOffset)
            let audioPacketSize = Int(audioPacketDescription.mDataByteSize)
            let audioPacketData = Data(bytes: streamData.advanced(by: audioPacketStart), count: audioPacketSize)
-            selfAudioParser.audioPackets.append((audioPacketDescription,audioPacketData))
+            selfAudioParser.append(description: audioPacketDescription, data: audioPacketData)
        }
-    } else {
+    } else { // not compressed audio (.wav)
+        Log.debug("uncompressed audio")
        let format = fileAudioFormat.streamDescription.pointee
        let bytesPerAudioPacket = Int(format.mBytesPerPacket)
        for i in 0 ..< Int(packetCount) {
            let audioPacketStart = i * bytesPerAudioPacket
            let audioPacketSize = bytesPerAudioPacket
            let audioPacketData = Data(bytes: streamData.advanced(by: audioPacketStart), count: audioPacketSize)
-            selfAudioParser.audioPackets.append((nil, audioPacketData))
+            selfAudioParser.append(description: nil, data: audioPacketData)
        }
    }
+    
 }
@@ -56,10 +56,30 @@ public struct SAAudioAvailabilityRange {
        }
    }
    
+    var secondsLeftToBuffer: Double {
+        get {
+            return predictedDurationToLoad - (startingNeedle + durationLoadedByNetwork)
+        }
+    }
+    
    public func contains(_ needle: Double) -> Bool {
        return needle >= startingNeedle && (needle - startingNeedle) < durationLoadedByNetwork
    }
    
+    public func reachedEndOfAudio(needle: Double) -> Bool {
+        var needleAtEnd = false
+        
+        if(totalDurationBuffered > 0 && needle > 0) {
+            needleAtEnd = needle >= totalDurationBuffered - 5
+        }
+        
+        // if most of the audio is buffered for long audio or in short audio there isn't many seconds left to buffer it means wwe've reached the end of the audio
+        
+        let isBuffered = (bufferingProgress > 0.99 || secondsLeftToBuffer < 5)
+        
+        return isBuffered && needleAtEnd
+    }
+    
    public func isCompletelyBuffered() -> Bool {
        return startingNeedle + durationLoadedByNetwork >= predictedDurationToLoad
    }
@@ -39,7 +39,7 @@ extension LockScreenViewProtocol {
         MPNowPlayingInfoCenter.default().nowPlayingInfo = [:]
    }
    
-    @available(iOS 10.0, *)
+    @available(iOS 10.0, tvOS 10.0, *)
    func setLockScreenInfo(withMediaInfo info: SALockScreenInfo?, duration: Duration) {
        var nowPlayingInfo:[String : Any] = [:]
        
@@ -50,6 +50,7 @@ extension LockScreenViewProtocol {
        
        let title = info.title
        let artist = info.artist
+        let albumTitle = info.albumTitle ?? artist
        let releaseDate = info.releaseDate
        
        // For some reason we need to set a duration here for the needle?
@@ -57,7 +58,7 @@ extension LockScreenViewProtocol {
        
        nowPlayingInfo[MPMediaItemPropertyTitle] = title
        nowPlayingInfo[MPMediaItemPropertyArtist] = artist
-        nowPlayingInfo[MPMediaItemPropertyAlbumTitle] = artist
+        nowPlayingInfo[MPMediaItemPropertyAlbumTitle] = albumTitle
        //nowPlayingInfo[MPMediaItemPropertyGenre] = //maybe later when we have it
        //nowPlayingInfo[MPMediaItemPropertyIsExplicit] = //maybe later when we have it
        nowPlayingInfo[MPMediaItemPropertyAlbumArtist] = artist
@@ -168,7 +169,10 @@ extension LockScreenViewProtocol {
    }
    
    func updateLockscreenSkipIntervals() {
-        MPRemoteCommandCenter.shared().skipBackwardCommand.preferredIntervals = [skipBackwardSeconds] as [NSNumber]
-        MPRemoteCommandCenter.shared().skipForwardCommand.preferredIntervals = [skipForwardSeconds] as [NSNumber]
+        let commandCenter = MPRemoteCommandCenter.shared()
+        commandCenter.skipBackwardCommand.isEnabled = skipBackwardSeconds > 0
+        commandCenter.skipBackwardCommand.preferredIntervals = [skipBackwardSeconds] as [NSNumber]
+        commandCenter.skipForwardCommand.isEnabled = skipForwardSeconds > 0
+        commandCenter.skipForwardCommand.preferredIntervals = [skipForwardSeconds] as [NSNumber]
    }
 }
@@ -31,7 +31,9 @@ protocol AudioDataManagable {
    
    var allowCellular: Bool { get set }
    
+    func setHTTPHeaderFields(_ fields: [String: String]?)
    func setBackgroundCompletionHandler(_ completionHandler: @escaping () -> ())
+    func setAllowCellularDownloadPreference(_ preference: Bool)
    
    func clear()
    
@@ -51,7 +53,7 @@ protocol AudioDataManagable {
 }

 class AudioDataManager: AudioDataManagable {
-    var allowCellular: Bool = false
+    var allowCellular: Bool = true
    
    static let shared: AudioDataManagable = AudioDataManager()
    
@@ -95,10 +97,19 @@ class AudioDataManager: AudioDataManagable {
        streamingCallbacks = []
    }
    
+    func setHTTPHeaderFields(_ fields: [String: String]?) {
+        streamWorker.HTTPHeaderFields = fields
+        downloadWorker.HTTPHeaderFields = fields
+    }
+    
    func setBackgroundCompletionHandler(_ completionHandler: @escaping () -> ()) {
        backgroundCompletion = completionHandler
    }
    
+    func setAllowCellularDownloadPreference(_ preference: Bool) {
+        allowCellular = preference
+    }
+    
    func attach(callback: @escaping (_ id: ID, _ progress: Double)->()) {
        globalDownloadProgressCallback = callback
    }
@@ -0,0 +1,34 @@
+//
+//  AudioQueue.swift
+//  SwiftAudioPlayer
+//
+//  Created by Joe Williams on 3/10/21.
+//
+
+import Foundation
+
+// wrapper for array of urls
+struct AudioQueue<T> {
+    private var audioUrls: [T] = []
+
+    var isQueueEmpty: Bool {
+        return audioUrls.isEmpty
+    }
+
+    var count: Int {
+        return audioUrls.count
+    }
+
+    var front: T? {
+        return audioUrls.first
+    }
+
+    mutating func append(item: T) {
+        audioUrls.append(item)
+    }
+
+    mutating func dequeue() -> T? {
+        guard !isQueueEmpty else { return nil }
+        return audioUrls.removeFirst()
+    }
+}
@@ -31,6 +31,8 @@ protocol AudioDataDownloadable: AnyObject {
    var numberOfActive: Int { get }
    var numberOfQueued: Int { get }
    
+    var HTTPHeaderFields: [String: String]? { get set }
+    
    func getProgressOfDownload(withID id: ID) -> Double?
    
    func start(withID id: ID, withRemoteUrl remoteUrl: URL, completion: @escaping (URL) -> ())
@@ -57,6 +59,8 @@ class AudioDownloadWorker: NSObject, AudioDataDownloadable {
        return URLSession(configuration: config, delegate: self, delegateQueue: nil)
    }()
    
+    var HTTPHeaderFields: [String: String]?
+    
    private var activeDownloads: [ActiveDownload] = []
    private var queuedDownloads = Set<DownloadInfo>()
    
@@ -111,7 +115,10 @@ class AudioDownloadWorker: NSObject, AudioDataDownloadable {
        
        queuedDownloads.remove(info)
        
-        let task: URLSessionDownloadTask = session.downloadTask(with: info.remoteUrl)
+        var request = URLRequest(url: info.remoteUrl)
+        HTTPHeaderFields?.forEach { request.setValue($1, forHTTPHeaderField: $0) }
+        
+        let task: URLSessionDownloadTask = session.downloadTask(with: request)
        task.taskDescription = info.id
        
        let activeTask = ActiveDownload(info: info, task: task)
@@ -103,12 +103,15 @@ extension FileStorage {
        }
        
        static func locate(_ id: ID) -> URL? {
-            let urls = FileManager.default.urls(for: .documentDirectory, in: .userDomainMask)
-            
-            for url in urls {
-                if url.absoluteString.contains(id) && url.pathExtension != "" {
-                    _ = getUrl(givenId: id, andFileExtension: url.pathExtension)
-                    return url
+            let folderUrls = FileManager.default.urls(for: .documentDirectory, in: .userDomainMask)
+            guard folderUrls.count != 0 else { return nil }
+
+            if let urls = try? FileManager.default.contentsOfDirectory(at: folderUrls[0], includingPropertiesForKeys: nil) {
+                for url in urls {
+                    if url.absoluteString.contains(id) && url.pathExtension != "" {
+                        _ = getUrl(givenId: id, andFileExtension: url.pathExtension)
+                        return url
+                    }
                }
            }
            return nil
@@ -44,6 +44,9 @@ import Foundation
 protocol AudioDataStreamable {
    //if user taps download then starts to stream
    init(progressCallback: @escaping (_ id: ID, _ dto: StreamProgressDTO) -> (), doneCallback: @escaping (_ id: ID, _ error: Error?)->Bool) //Bool is should save or not
+    
+    var HTTPHeaderFields: [String: String]? { get set }
+    
    func start(withID id: ID, withRemoteURL url: URL, withInitialData data: Data?, andTotalBytesExpectedPreviously previousTotalBytesExpected: Int64?)
    func pause(withId id: ID)
    func resume(withId id: ID)
@@ -66,6 +69,8 @@ class AudioStreamWorker:NSObject, AudioDataStreamable {
    fileprivate let doneCallback: (_ id: ID, _ error: Error?) -> Bool
    private var session: URLSession!
    
+    var HTTPHeaderFields: [String: String]?
+    
    private var id: ID?
    private var url: URL?
    private var task: URLSessionDataTask?
@@ -89,7 +94,7 @@ class AudioStreamWorker:NSObject, AudioDataStreamable {
        
        let config = URLSessionConfiguration.background(withIdentifier: "SwiftAudioPlayer.stream")
        // Specifies that the phone should keep trying till it receives connection instead of dropping immediately
-        if #available(iOS 11.0, *) {
+        if #available(iOS 11.0, tvOS 11.0, *) {
            config.waitsForConnectivity = true
        }
        self.session = URLSession(configuration: config, delegate: self, delegateQueue: nil) //TODO: should we use ephemeral
@@ -105,6 +110,7 @@ class AudioStreamWorker:NSObject, AudioDataStreamable {
        
        if let data = data {
            var request = URLRequest(url: url, cachePolicy: .useProtocolCachePolicy, timeoutInterval: TIMEOUT)
+            HTTPHeaderFields?.forEach { request.setValue($1, forHTTPHeaderField: $0) }
            request.addValue("bytes=\(data.count)-", forHTTPHeaderField: "Range")
            task = session.dataTask(with: request)
            task?.taskDescription = id
@@ -121,10 +127,11 @@ class AudioStreamWorker:NSObject, AudioDataStreamable {
            
            task?.resume()
        } else {
-            task = session.dataTask(with: url)
-            task?.resume()
-            
+            var request = URLRequest(url: url)
+            HTTPHeaderFields?.forEach { request.setValue($1, forHTTPHeaderField: $0) }
+            task = session.dataTask(with: request)
            task?.taskDescription = id
+            task?.resume()
        }
    }
    
@@ -217,6 +224,7 @@ class AudioStreamWorker:NSObject, AudioDataStreamable {
        self.progressCallback(id, StreamProgressDTO(progress: 0, data: Data(), totalBytesExpected: totalBytesExpectedForWholeFile))
        
        var request = URLRequest(url: url, cachePolicy: .useProtocolCachePolicy, timeoutInterval: TIMEOUT)
+        HTTPHeaderFields?.forEach { request.setValue($1, forHTTPHeaderField: $0) }
        request.addValue("bytes=\(offset)-", forHTTPHeaderField: "Range")
        task = session.dataTask(with: request)
        task?.resume()
@@ -314,6 +322,7 @@ extension AudioStreamWorker: URLSessionDataDelegate {
            Log.monitor("\(task.currentRequest?.url?.absoluteString ?? "nil url") error: \(err.localizedDescription)")
            
            let _ = doneCallback(id, err)
+            return
        }
        
        let shouldSave = doneCallback(id, nil)
@@ -45,6 +45,15 @@ public class SAPlayer {
    private var presenter: SAPlayerPresenter!
    private var player: AudioEngine?
    
+    /**
+    Any necessary header fields for streaming and downloading requests can be set here.
+    */
+    public var HTTPHeaderFields: [String: String]? {
+        didSet {
+            AudioDataManager.shared.setHTTPHeaderFields(HTTPHeaderFields)
+        }
+    }
+    
    /**
    Access the engine of the player. Engine is nil if player has not been initialized with audio.
     
@@ -56,19 +65,73 @@ public class SAPlayer {
        }
    }
    
+    /**
+    Unique ID for the current engine. This will be nil if no audio has been initialized which means no engine exists.
+    */
+    public var engineUID: String? {
+        get {
+            return player?.key
+        }
+    }
+    
+    /**
+    Access the player node of the engine. Node is nil if player has not been initialized with audio.
+     
+     - Important: Changes to the engine and this node are not safe guarded, thus unknown behaviour can arise from changing the engine or this node. Just be wary and read [documentation of AVAudioEngine](https://developer.apple.com/documentation/avfoundation/avaudioengine) well when modifying,
+    */
+    public var playerNode: AVAudioPlayerNode? {
+        get {
+            return player?.playerNode
+        }
+    }
+    
    /**
    Corresponding to the overall volume of the player. Volume's default value is 1.0 and the range of valid values is 0.0 to 1.0. Volume is nil if no audio has been initialized yet.
    */
    public var volume: Float? {
        get {
-            return player?.engine.mainMixerNode.volume
+            return player?.playerNode.volume
        }
        
        set {
            guard let value = newValue else { return }
            guard value >= 0.0 && value <= 1.0 else { return }
            
-            player?.engine.mainMixerNode.volume = value
+            player?.playerNode.volume = value
+        }
+    }
+    
+    /**
+    Corresponding to the rate of audio playback. This rate assumes use of the default rate modifier at the first index of `audioModifiers`; if you removed that modifier than this will be nil. If no audio has been initialized then this will also be nil.
+     
+     - Note: By default this engine has added a pitch modifier node to change the pitch so that on playback rate changes of spoken word the pitch isn't shifted.
+     
+     The component description of this node is:
+     ````
+     var componentDescription: AudioComponentDescription {
+        get {
+            var ret = AudioComponentDescription()
+            ret.componentType = kAudioUnitType_FormatConverter
+            ret.componentSubType = kAudioUnitSubType_AUiPodTimeOther
+            return ret
+        }
+     }
+     ````
+     Please look at [forums.developer.apple.com/thread/5874](https://forums.developer.apple.com/thread/5874) and [forums.developer.apple.com/thread/6050](https://forums.developer.apple.com/thread/6050) for more details.
+     
+     For more details on pitch modifiers for playback rate changes please look at [developer.apple.com/forums/thread/6050](https://developer.apple.com/forums/thread/6050).
+    */
+    public var rate: Float? {
+        get {
+            return (audioModifiers.first as? AVAudioUnitTimePitch)?.rate
+        }
+        
+        set {
+            guard let value = newValue else { return }
+            guard let node = audioModifiers.first as? AVAudioUnitTimePitch else { return }
+            
+            node.rate = value
+            playbackRateOfAudioChanged(rate: value)
        }
    }
    
@@ -109,9 +172,18 @@ public class SAPlayer {
         }
         ````
         Please look at [forums.developer.apple.com/thread/5874](https://forums.developer.apple.com/thread/5874) and [forums.developer.apple.com/thread/6050](https://forums.developer.apple.com/thread/6050) for more details.
+     
+     For more details on pitch modifiers for playback rate changes please look at [developer.apple.com/forums/thread/6050](https://developer.apple.com/forums/thread/6050).
+     
+     To remove this default pitch modifier for playback rate changes, remove the node by calling `SAPlayer.shared.clearAudioModifiers()`.
     */
    public var audioModifiers: [AVAudioUnit] = []
    
+    /**
+     List of queued audio for playback. You can edit this list as you wish to modify the queue.
+     */
+    public var audioQueued: [SAAudioQueueItem] = []
+    
    /**
     Total duration of current audio initialized. Returns nil if no audio is initialized in player.
     
@@ -157,11 +229,7 @@ public class SAPlayer {
     
     - Note: Setting this to nil clears the information displayed on the lockscreen media player.
     */
-    public var mediaInfo: SALockScreenInfo? = nil {
-        didSet {
-            presenter.handleLockscreenInfo(info: mediaInfo)
-        }
-    }
+    public var mediaInfo: SALockScreenInfo? = nil
    
    private init() {
        presenter = SAPlayerPresenter(delegate: self)
@@ -179,6 +247,23 @@ public class SAPlayer {
        }
        
        audioModifiers.append(AVAudioUnitTimePitch(audioComponentDescription: componentDescription))
+        NotificationCenter.default.addObserver(self, selector: #selector(handleInterruption), name: AVAudioSession.interruptionNotification, object: nil)
+    }
+    
+    /**
+     Clears all [AVAudioUnit](https://developer.apple.com/documentation/avfoundation/audio_track_engineering/audio_engine_building_blocks/audio_enhancements) modifiers intended to be used for realtime audio manipulation.
+     */
+    public func clearAudioModifiers() {
+        audioModifiers.removeAll()
+    }
+    
+    /**
+     Append an [AVAudioUnit](https://developer.apple.com/documentation/avfoundation/audio_track_engineering/audio_engine_building_blocks/audio_enhancements) modifier to the list of modifiers used for realtime audio manipulation. The modifier will be added to the end of the list.
+
+     - Parameter modifier: The modifier to append.
+     */
+    public func addAudioModifier(_ modifer: AVAudioUnit) {
+        audioModifiers.append(modifer)
    }
    
    /**
@@ -189,9 +274,8 @@ public class SAPlayer {
     */
    public static func prettifyTimestamp(_ timestamp: Double) -> String {
        let hours = Int(timestamp / 60 / 60)
-        let minutes = Int((timestamp - Double(hours * 60)) / 60)
-        
-        let secondsLeft = Int(timestamp) - (minutes * 60)
+        let minutes = Int((timestamp - Double(hours * 60 * 60)) / 60)
+        let secondsLeft = Int(timestamp - Double(hours * 60 * 60) - Double(minutes * 60))
        
        return "\(hours):\(String(format: "%02d", minutes)):\(String(format: "%02d", secondsLeft))"
    }
@@ -203,6 +287,44 @@ public class SAPlayer {
    func addUrlToMapping(url: URL) {
        presenter.addUrlToKeyMap(url)
    }
+    
+    @objc func handleInterruption(notification: Notification) {
+        guard let userInfo = notification.userInfo,
+            let typeValue = userInfo[AVAudioSessionInterruptionTypeKey] as? UInt,
+            let type = AVAudioSession.InterruptionType(rawValue: typeValue) else {
+                return
+        }
+
+        // Switch over the interruption type.
+        switch type {
+
+        case .began:
+            // An interruption began. Update the UI as necessary.
+            pause()
+
+        case .ended:
+           // An interruption ended. Resume playback, if appropriate.
+
+            guard let optionsValue = userInfo[AVAudioSessionInterruptionOptionKey] as? UInt else { return }
+            let options = AVAudioSession.InterruptionOptions(rawValue: optionsValue)
+            if options.contains(.shouldResume) {
+                // An interruption ended. Resume playback.
+                play()
+            } else {
+                // An interruption ended. Don't resume playback.
+            }
+
+        default: ()
+        }
+    }	
+}
+
+public enum SAPlayerBitrate {
+    /// This bitrate is good for radio streams that are passing ittle amounts of audio data at a time. This will allow the player to process the audio data in a fast enough rate to not pause or get stuck playing. This rate however ends up using more CPU and is worse for your battery-life and performance of your app.
+    case low
+    
+    /// This bitrate is good for streaming saved audio files like podcasts where most of the audio data will be received from the remote server at the beginning in a short time. This rate is more performant by using much less CPU and being better for your battery-life and app performance.
+    case high // go for audio files being streamed. This is uses less CPU and
 }

 //MARK: - External Player Controls
@@ -266,6 +388,23 @@ extension SAPlayer {
    /**
     If using an AVAudioUnitTimePitch, it's important to notify the player that the rate at which the audio playing has changed to keep the media player in the lockscreen up to date. This is only important for playback rate changes.
     
+     - Note: By default this engine has added a pitch modifier node to change the pitch so that on playback rate changes of spoken word the pitch isn't shifted.
+     
+     The component description of this node is:
+     ````
+     var componentDescription: AudioComponentDescription {
+        get {
+            var ret = AudioComponentDescription()
+            ret.componentType = kAudioUnitType_FormatConverter
+            ret.componentSubType = kAudioUnitSubType_AUiPodTimeOther
+            return ret
+        }
+     }
+     ````
+     Please look at [forums.developer.apple.com/thread/5874](https://forums.developer.apple.com/thread/5874) and [forums.developer.apple.com/thread/6050](https://forums.developer.apple.com/thread/6050) for more details.
+     
+     For more details on pitch modifiers for playback rate changes please look at [developer.apple.com/forums/thread/6050](https://developer.apple.com/forums/thread/6050).
+     
     - Parameter rate: The current rate at which the audio is playing.
     */
    public func playbackRateOfAudioChanged(rate: Float) {
@@ -277,16 +416,34 @@ extension SAPlayer {
     
     - Important: If intending to use [AVAudioUnit](https://developer.apple.com/documentation/avfoundation/audio_track_engineering/audio_engine_building_blocks/audio_enhancements) audio modifiers during playback, the list of audio modifiers under `SAPlayer.shared.audioModifiers` must be finalized before calling this function. After all realtime audio manipulations within the this will be effective.
     
+     - Note: The default list already has an AVAudioUnitTimePitch node first in the list. This node is specifically set to change the rate of audio without changing the pitch of the audio (intended for changing the rate of spoken word).
+     
+         The component description of this node is:
+         ````
+         var componentDescription: AudioComponentDescription {
+            get {
+                var ret = AudioComponentDescription()
+                ret.componentType = kAudioUnitType_FormatConverter
+                ret.componentSubType = kAudioUnitSubType_AUiPodTimeOther
+                return ret
+            }
+         }
+         ````
+         Please look at [forums.developer.apple.com/thread/5874](https://forums.developer.apple.com/thread/5874) and [forums.developer.apple.com/thread/6050](https://forums.developer.apple.com/thread/6050) for more details.
+     
+     To remove this default pitch modifier for playback rate changes, remove the node by calling `SAPlayer.shared.clearAudioModifiers()`.
+     
     - Parameter withSavedUrl: The URL of the audio saved on the device.
     - Parameter mediaInfo: The media information of the audio to show on the lockscreen media player (optional).
     */
    public func startSavedAudio(withSavedUrl url: URL, mediaInfo: SALockScreenInfo? = nil) {
-        self.mediaInfo = mediaInfo
-        presenter.handlePlaySavedAudio(withSavedUrl: url)
-    }
-    
-    @available(*, deprecated, renamed: "startSavedAudio")
-    public func initializeSavedAudio(withSavedUrl url: URL, mediaInfo: SALockScreenInfo? = nil) {
+        
+        // Because we support queueing, we want to clear off any existing players.
+        // Therefore, instantiate new player every time, destroy any existing ones.
+        // This prevents a crash where an owning engine already exists.
+        presenter.handleClear()
+        
+        // order here matters, need to set media info before trying to play audio
        self.mediaInfo = mediaInfo
        presenter.handlePlaySavedAudio(withSavedUrl: url)
    }
@@ -296,31 +453,92 @@ extension SAPlayer {
     
     - Important: If intending to use [AVAudioUnit](https://developer.apple.com/documentation/avfoundation/audio_track_engineering/audio_engine_building_blocks/audio_enhancements) audio modifiers during playback, the list of audio modifiers under `SAPlayer.shared.audioModifiers` must be finalized before calling this function. After all realtime audio manipulations within the this will be effective.
     
+     - Note: The default list already has an AVAudioUnitTimePitch node first in the list. This node is specifically set to change the rate of audio without changing the pitch of the audio (intended for changing the rate of spoken word).
+     
+         The component description of this node is:
+         ````
+         var componentDescription: AudioComponentDescription {
+            get {
+                var ret = AudioComponentDescription()
+                ret.componentType = kAudioUnitType_FormatConverter
+                ret.componentSubType = kAudioUnitSubType_AUiPodTimeOther
+                return ret
+            }
+         }
+         ````
+         Please look at [forums.developer.apple.com/thread/5874](https://forums.developer.apple.com/thread/5874) and [forums.developer.apple.com/thread/6050](https://forums.developer.apple.com/thread/6050) for more details.
+     
+     To remove this default pitch modifier for playback rate changes, remove the node by calling `SAPlayer.shared.clearAudioModifiers()`.
+     
     - Note: Subscribe to `SAPlayer.Updates.StreamingBuffer` to see updates in streaming progress.
     
     - Parameter withRemoteUrl: The URL of the remote audio.
+     - Parameter bitrate: The bitrate of the streamed audio. By default the bitrate is set to high for streaming saved audio files. If you want to stream radios then you should use the `low` bitrate option.
     - Parameter mediaInfo: The media information of the audio to show on the lockscreen media player (optional).
     */
-    public func startRemoteAudio(withRemoteUrl url: URL, mediaInfo: SALockScreenInfo? = nil) {
+    public func startRemoteAudio(withRemoteUrl url: URL, bitrate: SAPlayerBitrate = .high, mediaInfo: SALockScreenInfo? = nil) {
+        
+        // Because we support queueing, we want to clear off any existing players.
+        // Therefore, instantiate new player every time, destroy any existing ones.
+        // This prevents a crash where an owning engine already exists.
+        presenter.handleClear()
+        
+        // order here matters, need to set media info before trying to play audio
        self.mediaInfo = mediaInfo
-        presenter.handlePlayStreamedAudio(withRemoteUrl: url)
-    }
-    
-    @available(*, deprecated, renamed: "startRemoteAudio")
-    public func initializeRemoteAudio(withRemoteUrl url: URL, mediaInfo: SALockScreenInfo? = nil) {
-        self.mediaInfo = mediaInfo
-        presenter.handlePlayStreamedAudio(withRemoteUrl: url)
+        presenter.handlePlayStreamedAudio(withRemoteUrl: url, bitrate: bitrate)
    }
    
+    /**
+     Stops any streaming in progress.
+     */
    public func stopStreamingRemoteAudio() {
        presenter.handleStopStreamingAudio()
    }
    
+    /**
+     Queues remote audio to be played next. The URLs in the queue can be both remote or on disk but once the queued audio starts playing it will start buffering and loading then. This means no guarantee for a 'gapless' playback where there might be several moments in between one audio ending and another starting due to buffering remote audio.
+     
+     - Parameter withRemoteUrl: The URL of the remote audio.
+     - Parameter bitrate: The bitrate of the streamed audio. By default the bitrate is set to high for streaming saved audio files. If you want to stream radios then you should use the `low` bitrate option.
+     - Parameter mediaInfo: The media information of the audio to show on the lockscreen media player (optional).
+     */
+    public func queueRemoteAudio(withRemoteUrl url: URL, bitrate: SAPlayerBitrate = .high, mediaInfo: SALockScreenInfo? = nil) {
+        presenter.handleQueueStreamedAudio(withRemoteUrl: url, mediaInfo: mediaInfo, bitrate: bitrate)
+    }
+    
+    /**
+     Queues saved audio to be played next. The URLs in the queue can be both remote or on disk but once the queued audio starts playing it will start buffering and loading then. This means no guarantee for a 'gapless' playback where there might be several moments in between one audio ending and another starting due to buffering remote audio.
+     
+     - Parameter withSavedUrl: The URL of the audio saved on the device.
+     - Parameter mediaInfo: The media information of the audio to show on the lockscreen media player (optional).
+     */
+    public func queueSavedAudio(withSavedUrl url: URL, mediaInfo: SALockScreenInfo? = nil) {
+        presenter.handleQueueSavedAudio(withSavedUrl: url, mediaInfo: mediaInfo)
+    }
+    
+    /**
+     Remove the first queued audio if one exists. Receive the first URL removed back.
+     
+     - Returns the URL of the removed audio.
+     */
+    public func removeFirstQueuedAudio() -> URL? {
+        guard audioQueued.count != 0 else { return nil }
+        return presenter.handleRemoveFirstQueuedItem()
+    }
+    
+    /**
+     Clear the list of queued audio.
+     
+     - Returns the list of removed audio URLs
+     */
+    public func clearAllQueuedAudio() -> [URL] {
+        return presenter.handleClearQueued()
+    }
+    
    /**
     Resets the player to the state before initializing audio and setting media info.
     */
    public func clear() {
-        player = nil
        presenter.handleClear()
    }
 }
@@ -328,25 +546,22 @@ extension SAPlayer {

 //MARK: - Internal implementation of delegate
 extension SAPlayer: SAPlayerDelegate {
-    func startAudioDownloaded(withSavedUrl url: AudioURL) {
-        player?.pause()
-        player?.invalidate()
+    internal func startAudioDownloaded(withSavedUrl url: AudioURL) {
        player = AudioDiskEngine(withSavedUrl: url, delegate: presenter)
    }
    
-    func startAudioStreamed(withRemoteUrl url: AudioURL) {
-        player?.pause()
-        player?.invalidate()
-        player = AudioStreamEngine(withRemoteUrl: url, delegate: presenter)
+    internal func startAudioStreamed(withRemoteUrl url: AudioURL, bitrate: SAPlayerBitrate) {
+        player = AudioStreamEngine(withRemoteUrl: url, delegate: presenter, bitrate: bitrate)
    }
    
-    func clearEngine() {
+    internal func clearEngine() {
        player?.pause()
        player?.invalidate()
        player = nil
+        Log.info("cleared engine")
    }
    
-    func playEngine() {
+    internal func playEngine() {
        becomeDeviceAudioPlayer()
        player?.play()
    }
@@ -354,24 +569,22 @@ extension SAPlayer: SAPlayerDelegate {
    //Start taking control as the device's player
    private func becomeDeviceAudioPlayer() {
        do {
-            if #available(iOS 11.0, *) {
-//                try AVAudioSession.sharedInstance().setCategory(.playback, mode: .spokenAudio, policy: .longForm, options: [])
+            if #available(iOS 11.0, tvOS 11.0, *) {
+                try AVAudioSession.sharedInstance().setCategory(.playback, mode: .spokenAudio, policy: .longFormAudio, options: [])
            } else {
-                // Fallback on earlier versions
+                try AVAudioSession.sharedInstance().setCategory(AVAudioSession.Category.playback, mode: AVAudioSession.Mode(rawValue: convertFromAVAudioSessionMode(AVAudioSession.Mode.default)), options: .allowAirPlay)
            }
-            try AVAudioSession.sharedInstance().setCategory(AVAudioSession.Category.playback, mode: AVAudioSession.Mode(rawValue: convertFromAVAudioSessionMode(AVAudioSession.Mode.default)), options: .allowAirPlay)
-
            try AVAudioSession.sharedInstance().setActive(true, options: .notifyOthersOnDeactivation)
        } catch {
            Log.monitor("Problem setting up AVAudioSession to play in:: \(error.localizedDescription)")
        }
    }
    
-    func pauseEngine() {
+    internal func pauseEngine() {
        player?.pause()
    }
    
-    func seekEngine(toNeedle needle: Needle) {
+    internal func seekEngine(toNeedle needle: Needle) {
        var seekToNeedle = needle < 0 ? 0 : needle
        seekToNeedle = needle > Needle(duration ?? 0) ? Needle(duration ?? 0) : needle
        player?.seek(toNeedle: seekToNeedle)
@@ -27,11 +27,12 @@ import Foundation
 import CoreMedia

 protocol SAPlayerDelegate: AnyObject, LockScreenViewProtocol {
+    var mediaInfo: SALockScreenInfo? { get set }
    var skipForwardSeconds: Double { get set }
    var skipBackwardSeconds: Double { get set }
    
    func startAudioDownloaded(withSavedUrl url: AudioURL)
-    func startAudioStreamed(withRemoteUrl url: AudioURL)
+    func startAudioStreamed(withRemoteUrl url: AudioURL, bitrate: SAPlayerBitrate)
    func clearEngine()
    func playEngine()
    func pauseEngine()
@@ -100,5 +100,14 @@ extension SAPlayer {
        public static func setBackgroundCompletionHandler(_ completionHandler: @escaping () -> ()) {
            AudioDataManager.shared.setBackgroundCompletionHandler(completionHandler)
        }
+        
+        /**
+         Whether downloading audio on cellular data is allowed. By default this is set to `true`.
+         */
+        public static var allowUsingCellularData = true {
+            didSet {
+                AudioDataManager.shared.setAllowCellularDownloadPreference(allowUsingCellularData)
+            }
+        }
    }
 }
@@ -0,0 +1,167 @@
+//
+//  SAPlayerFeature.swift
+//  SwiftAudioPlayer
+//
+//  Created by Tanha Kabir on 3/10/21.
+//
+
+import Foundation
+import AVFoundation
+
+extension SAPlayer {
+    /**
+     Special features for audio manipulation. These are examples of manipulations you can do with the player outside of this library. This is just an aggregation of community contibuted ones.
+     
+     - Note: These features assume default state of the player and `audioModifiers` meaning some expect the first audio modifier to be the default `AVAudioUnitTimePitch` that comes with the SAPlayer.
+     */
+    public struct Features {
+        
+        /**
+         Feature to skip silences in spoken word audio. The player will speed up the rate of audio playback when silence is detected.
+         
+         - Important: The first audio modifier must be the default `AVAudioUnitTimePitch` that comes with the SAPlayer for this feature to work.
+         */
+        public struct SkipSilences {
+            
+            static var enabled: Bool = false
+            static var originalRate: Float = 1.0
+            
+            /**
+             Enable feature to skip silences in spoken word audio. The player will speed up the rate of audio playback when silence is detected. This can be called at any point of audio playback.
+             
+             - Precondition: The first audio modifier must be the default `AVAudioUnitTimePitch` that comes with the SAPlayer for this feature to work.
+             - Important: If you want to change the rate of the overall player while having skip silences on, please use `SAPlayer.Features.SkipSilences.setRateSafely()` to properly set the rate of the player. Any rate changes to the player will be ignored while using Skip Silences otherwise.
+             */
+            public static func enable() -> Bool {
+                guard let engine = SAPlayer.shared.engine else { return false }
+                
+                Log.info("enabling skip silences feature")
+                enabled = true
+                originalRate = SAPlayer.shared.rate ?? 1.0
+                let format = engine.mainMixerNode.outputFormat(forBus: 0)
+                
+                
+                // look at documentation here to get an understanding of what is happening here: https://www.raywenderlich.com/5154-avaudioengine-tutorial-for-ios-getting-started#toc-anchor-005
+                engine.mainMixerNode.installTap(onBus: 0, bufferSize: 1024, format: format) { buffer, when in
+                    guard let channelData = buffer.floatChannelData else {
+                        return
+                    }
+
+                    let channelDataValue = channelData.pointee
+                    let channelDataValueArray = stride(from: 0,
+                                                       to: Int(buffer.frameLength),
+                                                       by: buffer.stride).map { channelDataValue[$0] }
+
+                    let rms = sqrt(channelDataValueArray.map { $0 * $0 }.reduce(0, +) / Float(buffer.frameLength))
+
+                    let avgPower = 20 * log10(rms)
+
+                    let meterLevel = self.scaledPower(power: avgPower)
+                    Log.debug("meterLevel: \(meterLevel)")
+                    if meterLevel < 0.6 { // below 0.6 decibels is below audible audio
+                        SAPlayer.shared.rate = originalRate + 0.5
+                        Log.debug("speed up rate to \(String(describing: SAPlayer.shared.rate))")
+                    } else {
+                        SAPlayer.shared.rate = originalRate
+                        Log.debug("slow down rate to \(String(describing: SAPlayer.shared.rate))")
+                    }
+                }
+                
+                return true
+            }
+            
+            /**
+             Disable feature to skip silences in spoken word audio. The player will speed up the rate of audio playback when silence is detected. This can be called at any point of audio playback.
+             
+             - Precondition: The first audio modifier must be the default `AVAudioUnitTimePitch` that comes with the SAPlayer for this feature to work.
+             */
+            public static func disable() -> Bool {
+                guard let engine = SAPlayer.shared.engine else { return false }
+                Log.info("disabling skip silences feature")
+                engine.mainMixerNode.removeTap(onBus: 0)
+                SAPlayer.shared.rate = originalRate
+                enabled = false
+                return true
+            }
+            
+            /**
+             Use this function to set the overall rate of the player for when skip silences is on. This ensures that the overall rate will be what is set through this function even as skip silences is on; if this function is not used then any changes asked of from the overall player while skip silences is on won't be recorded!
+             
+             - Important: The first audio modifier must be the default `AVAudioUnitTimePitch` that comes with the SAPlayer for this feature to work.
+             */
+            public static func setRateSafely(_ rate: Float) {
+                originalRate = rate
+                SAPlayer.shared.rate = rate
+            }
+            
+            private static func scaledPower(power: Float) -> Float {
+                guard power.isFinite else { return 0.0 }
+                let minDb: Float = -80.0
+                if power < minDb {
+                    return 0.0
+                } else if power >= 1.0 {
+                    return 1.0
+                } else {
+                    return (abs(minDb) - abs(power)) / abs(minDb)
+                }
+            }
+        }
+        
+        /**
+         Feature to pause the player after a delay. This will happen regardless of if another audio clip has started.
+         */
+        public struct SleepTimer {
+            static var timer: Timer?
+            
+            /**
+             Enable feature to pause the player after a delay. This will happen regardless of if another audio clip has started.
+             
+             - Parameter afterDelay: The number of seconds to wait before pausing the audio
+             */
+            public static func enable(afterDelay delay: Double) {
+                timer = Timer.scheduledTimer(withTimeInterval: delay, repeats: false, block: { _ in
+                    SAPlayer.shared.pause()
+                })
+            }
+            
+            /**
+             Disable feature to pause the player after a delay. 
+             */
+            public static func disable() {
+                timer?.invalidate()
+            }
+        }
+        
+        /**
+         Feature to play the current playing audio on repeat until feature is disabled.
+         */
+        public struct Loop {
+            static var enabled: Bool = false
+            static var playingStatusId: UInt?
+            
+            /**
+             Enable feature to play the current playing audio on loop. This will continue until the feature is disabled. And this feature works for both remote and saved audio.
+             */
+            public static func enable() {
+                enabled = true
+                
+                guard playingStatusId == nil else { return }
+                
+                playingStatusId = SAPlayer.Updates.PlayingStatus.subscribe({ (url, status) in
+                    if status == .ended && enabled {
+                        SAPlayer.shared.seekTo(seconds: 0.0)
+                        SAPlayer.shared.play()
+                    }
+                })
+            }
+            
+            /**
+             Disable feature playing audio on loop.
+             */
+            public static func disable() {
+                enabled = false
+            }
+            
+        }
+    }
+}
@@ -37,13 +37,49 @@ public typealias UTC = Int
 public struct SALockScreenInfo {
    var title: String
    var artist: String
+    var albumTitle: String?
    var artwork: UIImage?
    var releaseDate: UTC
    
-    public init(title: String, artist: String, artwork: UIImage?, releaseDate: UTC) {
+    public init(title: String, artist: String, albumTitle: String?, artwork: UIImage?, releaseDate: UTC) {
        self.title = title
        self.artist = artist
+        self.albumTitle = albumTitle
        self.artwork = artwork
        self.releaseDate = releaseDate
    }
 }
+
+
+/**
+ Use to add audio to be queued for playback.
+ */
+public struct SAAudioQueueItem {
+    var loc: Location
+    var url: URL
+    var mediaInfo: SALockScreenInfo?
+    var bitrate: SAPlayerBitrate
+    
+    /**
+     Use to add audio to be queued for playback.
+     
+     - Parameter loc: If the URL for the file is remote or saved on device.
+     - Parameter url: URL of audio to be queued
+     - Parameter mediaInfo: Relevant lockscreen media info for the queued audio.
+     - Parameter bitrate: For streamed remote audio specifiy a bitrate if different from high. Use low bitrate for radio streams.
+     */
+    init(loc: Location, url: URL, mediaInfo: SALockScreenInfo?, bitrate: SAPlayerBitrate = .high) {
+        self.loc = loc
+        self.url = url
+        self.mediaInfo = mediaInfo
+        self.bitrate = bitrate
+    }
+    
+    /**
+     Where the queued audio is sourced. Remote to be streamed or locally saved on device.
+     */
+    enum Location {
+        case remote
+        case saved
+    }
+}
@@ -36,20 +36,18 @@ class SAPlayerPresenter {
    
    private var key: String?
    private var isPlaying: SAPlayingStatus = .buffering
-    private var mediaInfo: SALockScreenInfo?
    
    private var urlKeyMap: [Key: URL] = [:]
    
    var durationRef:UInt = 0
    var needleRef:UInt = 0
    var playingStatusRef:UInt = 0
+    var audioQueue: [SAAudioQueueItem] = []
    
    init(delegate: SAPlayerDelegate?) {
        self.delegate = delegate
        
        delegate?.setLockScreenControls(presenter: self)
-        
-        prepareNextEpisodeToPlay()
    }
    
    func getUrl(forKey key: Key) -> URL? {
@@ -61,10 +59,12 @@ class SAPlayerPresenter {
    }
    
    func handleClear() {
+        delegate?.clearEngine()
+        
        needle = nil
        duration = nil
        key = nil
-        mediaInfo = nil
+        delegate?.mediaInfo = nil
        delegate?.clearLockScreenInfo()
        
        AudioClockDirector.shared.detachFromChangesInDuration(withID: durationRef)
@@ -77,9 +77,34 @@ class SAPlayerPresenter {
        delegate?.startAudioDownloaded(withSavedUrl: url)
    }
    
-    func handlePlayStreamedAudio(withRemoteUrl url: URL) {
+    func handlePlayStreamedAudio(withRemoteUrl url: URL, bitrate: SAPlayerBitrate) {
        attachForUpdates(url: url)
-        delegate?.startAudioStreamed(withRemoteUrl: url)
+        delegate?.startAudioStreamed(withRemoteUrl: url, bitrate: bitrate)
+    }
+    
+    func handleQueueStreamedAudio(withRemoteUrl url: URL, mediaInfo: SALockScreenInfo?, bitrate: SAPlayerBitrate) {
+        audioQueue.append(SAAudioQueueItem(loc: .remote, url: url, mediaInfo: mediaInfo, bitrate: bitrate))
+    }
+    
+    func handleQueueSavedAudio(withSavedUrl url: URL, mediaInfo: SALockScreenInfo?) {
+        audioQueue.append(SAAudioQueueItem(loc: .saved, url: url, mediaInfo: mediaInfo))
+    }
+    
+    func handleRemoveFirstQueuedItem() -> URL? {
+        guard audioQueue.count != 0 else { return nil }
+        
+        return audioQueue.remove(at: 0).url
+    }
+    
+    func handleClearQueued() -> [URL] {
+        guard audioQueue.count != 0 else { return [] }
+        
+        let urls = audioQueue.map { item in
+            return item.url
+        }
+        
+        audioQueue = []
+        return urls
    }
    
    private func attachForUpdates(url: URL) {
@@ -98,7 +123,7 @@ class SAPlayerPresenter {
            self.delegate?.updateLockscreenPlaybackDuration(duration: duration)
            self.duration = duration
            
-            self.delegate?.setLockScreenInfo(withMediaInfo: self.mediaInfo, duration: duration)
+            self.delegate?.setLockScreenInfo(withMediaInfo: self.delegate?.mediaInfo, duration: duration)
        })
        
        needleRef = AudioClockDirector.shared.attachToChangesInNeedle(closure: { [weak self] (key, needle) in
@@ -120,6 +145,15 @@ class SAPlayerPresenter {
            }
            
            self.isPlaying = isPlaying
+            
+            if(self.isPlaying == .paused && self.shouldPlayImmediately) {
+                self.shouldPlayImmediately = false
+                self.handlePlay()
+            }
+            
+            if(self.isPlaying == .ended) {
+                self.playNextAudioIfExists()
+            }
        })
    }
    
@@ -133,11 +167,6 @@ class SAPlayerPresenter {
        delegate?.clearEngine()
        detachFromUpdates()
    }
-    
-    @available(iOS 10.0, *)
-    func handleLockscreenInfo(info: SALockScreenInfo?) {
-        self.mediaInfo = info
-    }
 }

 //MARK:- Used by outside world including:
@@ -196,17 +225,40 @@ extension SAPlayerPresenter: AudioEngineDelegate {
    func didError() {
        Log.monitor("We should have handled engine error")
    }
-    
-    func didEndPlaying() {
-        // TODO
-//        playNextEpisode()
-    }
 }

 //MARK:- Autoplay
-//FIXME: This needs to be refactored
 extension SAPlayerPresenter {
-    func prepareNextEpisodeToPlay() {
-        // TODO
+    func playNextAudioIfExists() {
+        Log.info("looking foor next audio in queue to play")
+        guard audioQueue.count > 0 else {
+            Log.info("no queued audio")
+            return
+        }
+        let nextAudioURL = audioQueue.removeFirst()
+        let key = nextAudioURL.url.key
+        
+
+        Log.info("getting ready to play \(nextAudioURL)")
+        AudioQueueDirector.shared.changeInQueue(key, url: nextAudioURL.url)
+        
+        handleClear()
+        
+        delegate?.mediaInfo = nextAudioURL.mediaInfo
+        
+        // We need to give a second to clean up the previous engine properly. Deinit takes some time.
+        Timer.scheduledTimer(withTimeInterval: 1.0, repeats: false) { [weak self] (_) in
+            guard let self = self else { return }
+            
+            switch nextAudioURL.loc {
+            case .remote:
+                self.handlePlayStreamedAudio(withRemoteUrl: nextAudioURL.url, bitrate: nextAudioURL.bitrate)
+                break
+            case .saved:
+                self.handlePlaySavedAudio(withSavedUrl: nextAudioURL.url)
+            }
+            
+            self.shouldPlayImmediately = true
+        }
    }
 }
@@ -197,6 +197,30 @@ extension SAPlayer {
                DownloadProgressDirector.shared.detach(withID: id)
            }
        }
+        
+        public struct AudioQueue {
+            /**
+             Subscribe to updates to changes in the progress of your audio queue. When streaming audio playback completes
+             and continues onto the next track, the closure is invoked.
+             - Note: It's recommended to have a weak reference to a class that uses this function
+             - Parameter closure: The closure that will receive the updates of the changes in duration.
+             - Parameter url: The corresponding remote URL for the forthcoming audio file.
+             - Returns: the id for the subscription in the case you would like to unsubscribe to updates for the closure.
+             */
+            public static func subscribe(_ closure: @escaping (_ key: String, _ newUrl: URL) -> ()) -> UInt {
+                return AudioQueueDirector.shared.attach(closure: { (key, url) in
+                    closure(key, url)
+                })
+            }
+
+            /**
+             Stop recieving updates of changes in download progress.
+             - Parameter id: The closure with this id will stop receiving updates.
+             */
+            public static func unsubscribe(_ id: UInt) {
+                AudioQueueDirector.shared.detach(withID: id)
+            }
+        }
    }
 }

@@ -8,7 +8,7 @@

 Pod::Spec.new do |s|
  s.name             = 'SwiftAudioPlayer'
-  s.version          = '2.9.0'
+  s.version          = '6.3.1'
  s.summary          = 'SwiftAudioPlayer is a Swift based audio player that can handle streaming from a remote location and audio manipulation.'

 # This description is used to generate tags and improve search results.
@@ -26,9 +26,9 @@ SwiftAudioPlayer is a Swift based audio player that can handle streaming from a
  s.license          = { :type => 'MIT', :file => 'LICENSE' }
  s.author           = { 'tanhakabir' => 'tanhakabir.ca@gmail.com', 'JonMercer' => 'mercer.jon@gmail.com' }
  s.source           = { :git => 'https://github.com/tanhakabir/SwiftAudioPlayer.git', :tag => s.version.to_s }
-  # s.social_media_url = 'https://twitter.com/<TWITTER_USERNAME>'
+  s.social_media_url = 'https://twitter.com/_tanhakabir'

-  s.ios.deployment_target = '10.0'
+  s.platforms = { :ios => '10.0', :tvos => '10.0' }

  s.source_files = 'Source/**/*'
  s.swift_version = '5.0'
Author	SHA1	Message	Date
tanhakabir	3f93bd1a86	Release 6.3.1	2021-08-16 19:52:35 -07:00
tanhakabir	20c0253f68	Fix documentation	2021-08-16 19:52:15 -07:00
tanhakabir	5e78c446a9	Release 6.3.0	2021-08-16 19:36:27 -07:00
tanhakabir	487b071490	Make audio queue an easy to edit list	2021-08-16 19:33:29 -07:00
tanhakabir	b79d16b409	Add functions to remove queued audio items	2021-08-14 21:38:31 -07:00
tanhakabir	4684a92380	Release 6.2.0	2021-08-14 21:08:44 -07:00
tanhakabir	2cff597e45	Add documentation	2021-08-14 21:06:38 -07:00
tanhakabir	98dc7cfa3c	Release 6.1.0	2021-08-12 23:53:47 -07:00
tanhakabir	4f1242f56d	Merge pull request #136 from tanhakabir/issue-loop Issue loop	2021-08-12 19:44:47 -07:00
tanhakabir	f3c91ccc34	Fix buffering causing full pause	2021-08-12 19:44:12 -07:00
tanhakabir	2d88b69aa7	Fix update loops killing on end of audio	2021-08-12 16:58:38 -07:00
tanhakabir	f67b939ac4	Merge branch 'master' into issue-loop	2021-08-12 16:27:34 -07:00
tanhakabir	a0e9b973e0	checkpoint, working but bug in seek	2021-08-12 16:27:20 -07:00
tanhakabir	ef54080a68	Merge pull request #133 from cntrump/pr_fix_some_required_condition_is_false_cases Fix some "required condition is false" cases.	2021-08-12 16:26:39 -07:00
tanhakabir	2d35bbad59	Merge pull request #135 from cntrump/pr_improve_tvos_support Improve tvOS support	2021-08-12 15:55:04 -07:00
tanhakabir	13b68920d1	Merge pull request #134 from cntrump/pr_improve_lockscreen_info Improve LockScreen Info	2021-08-12 14:04:15 -07:00
Lvv.me	2e8f44c553	Improve tvOS support	2021-08-12 21:00:21 +08:00
Lvv.me	58ac9b5ae5	Improve LockScreen Info - Add albumTitle for SALockScreenInfo - Support disable skip forward/backward command	2021-08-10 21:22:31 +08:00
Lvv.me	706ab5961c	Fix some "required condition is false" cases. case 1: ``` "required condition is false: nil == owningEngine \|\| GetEngine() == owningEngine" ``` case 2: ``` "required condition is false: _engine->IsRunning()" ```	2021-08-10 17:38:08 +08:00
tanhakabir	50139ca8c5	Merge pull request #130 from cntrump/pr_improve_dataTask_config_order set taskDescription before resume() called.	2021-08-09 00:30:29 -07:00
tanhakabir	6c3e52b66e	Merge pull request #131 from cntrump/pr_add_missing_return Add missing `return` in doneCallback() for AudioStreamWorker.	2021-08-09 00:30:08 -07:00
Lvv.me	6d955687a3	Add missing `return` in doneCallback() for AudioStreamWorker.	2021-08-09 14:11:13 +08:00
Lvv.me	38d5740f4d	set taskDescription before resume() called.	2021-08-09 11:12:55 +08:00
tanhakabir	4cbfb4b16b	Improve end of audio detection	2021-08-08 11:22:22 -07:00
tanhakabir	01668790f3	Release 6.0.0	2021-08-08 11:04:23 -07:00
tanhakabir	1cf8fb99ba	Remove unnecessary project files	2021-08-08 11:02:37 -07:00
tanhakabir	2d3fe83a56	Merge pull request #125 from cntrump/pr_spm_and_tvos_support Add SPM and tvOS support	2021-08-08 10:46:57 -07:00
tanhakabir	5f63b52592	support custom HTTPHeaderFields Fixes #85 Co-Authored-By: cntrump <me@lvv.me>	2021-08-08 10:31:56 -07:00
Lvv.me	9111ac6257	Add SPM and tvOS support	2021-08-08 17:08:54 +08:00
tanhakabir	bfbb979897	Add stopping engine and playerNode on invalidate() and deinit Co-Authored-By: cntrump <me@lvv.me>	2021-08-07 19:06:59 -07:00
tanhakabir	0b40a6f0b4	Release 5.2.0	2021-07-20 10:50:43 -07:00
tanhakabir	f9465f54a0	Merge pull request #118 from dylancom/issue-117 fix: prevent mediainfo not being available yet in callbacks	2021-07-20 10:32:34 -07:00
tanhakabir	8ce28db471	Add documentation for important order	2021-07-20 10:32:16 -07:00
Dylan Companjen	a84f834f45	fix: prevent mediainfo not being available yet in callbacks	2021-07-19 18:40:01 +02:00
tanhakabir	e3e3af2b7a	Release 5.1.0	2021-07-18 23:09:08 -07:00
tanhakabir	6987458f0a	Merge pull request #114 from dylancom/issue-112 feat: pause player on interruption, resume when necessary	2021-07-18 22:58:50 -07:00
tanhakabir	c912d5f381	update formatting and control functions	2021-07-18 22:57:58 -07:00
Dylan	c444ae4c9f	feat: pause player on interruption, resume when necessary	2021-07-16 15:08:44 +02:00
tanhakabir	6d3f3c6d6f	Update README.md	2021-07-12 14:18:08 -04:00
tanhakabir	bb7f1d1d0a	Release 5.0.5	2021-05-09 17:16:22 -07:00
tanhakabir	6c446f27e0	fix maintaining rate changes while skip silences is enabled (#110 )	2021-05-09 17:15:44 -07:00
tanhakabir	c513c723ed	Release 5.0.4	2021-05-08 18:57:11 -07:00
tanhakabir	b34a264aec	Fix bug introduced by queuing for lockscreen info (#108 ) * add extra data for queuing and change order of clearing mediaInfo * make SAPlayer the only source for mediaInfo Co-authored-by: @dylancom Co-authored-by: @dezinezync	2021-05-08 18:55:08 -07:00
tanhakabir	a83c2f702f	pass lockscreen info to player in example app (#107 ) related to #106	2021-05-07 13:16:24 -07:00
tanhakabir	8644bf24fb	Merge pull request #105 from Husseinhj/patch-1 Anchor link in SAPlayer.Updates fixed	2021-05-03 20:42:19 -07:00
tanhakabir	69a979cb98	Add twitter handle to podspec	2021-05-03 20:40:57 -07:00
Hussein Habibi Juybari	6ba43e70ea	Rollback Contact header changes	2021-05-03 11:34:30 +04:30
Hussein Habibi Juybari	6f19009000	Anchor link in SAPlayer.Updates fixed	2021-05-03 11:32:30 +04:30
tanhakabir	64677ad6ce	Release 5.0.3	2021-04-28 15:33:46 -07:00
tanhakabir	3894309706	Merge pull request #102 from niczyja/session-fix Fix for audio session setup on iOS 11 and up	2021-04-26 09:41:07 -07:00
Maciej Sienkiewicz	e44f16258f	Fix for audio session setup on iOS 11 and up	2021-04-26 14:43:13 +02:00
tanhakabir	1e3cf35b7b	Release 5.0.2	2021-04-21 10:06:11 -07:00
tanhakabir	4bfb3f1774	fix packet parsing crash by putting audiopacket actions on a lock close #94 Co-Authored-By: fayinsky <38639193+fayinsky@users.noreply.github.com>	2021-04-21 10:05:39 -07:00
tanhakabir	e056336955	Release 5.0.1	2021-04-20 23:40:07 -07:00
tanhakabir	64d2959a27	fix volume changes taking effect on engine Co-Authored-By: fayinsky <38639193+fayinsky@users.noreply.github.com>	2021-04-20 23:37:36 -07:00
tanhakabir	eb1675d4fd	Merge pull request #97 from niczyja/issue-95 Fix for https://github.com/tanhakabir/SwiftAudioPlayer/issues/95	2021-04-20 23:35:33 -07:00
tanhakabir	ca7e48cbe7	Merge pull request #96 from niczyja/issue-76 Fix for https://github.com/tanhakabir/SwiftAudioPlayer/issues/76	2021-04-20 23:33:37 -07:00
tanhakabir	653f2817bc	remove need to pass in current rate	2021-04-20 23:32:53 -07:00
Maciej Sienkiewicz	edff806647	Fix for https://github.com/tanhakabir/SwiftAudioPlayer/issues/95	2021-04-20 14:56:27 +02:00
Maciej Sienkiewicz	c47d623118	Fix for https://github.com/tanhakabir/SwiftAudioPlayer/issues/76	2021-04-20 14:36:51 +02:00
tanhakabir	b270cf86ab	Release 5.0.0	2021-04-17 09:50:47 -07:00
tanhakabir	5c2fd7dc97	Fix radio streaming playback to be smooth (#92 ) Fix radio streaming playback to be smooth	2021-04-17 09:49:40 -07:00
tanhakabir	d21ef34392	update README with bitrate info	2021-04-17 09:48:02 -07:00
tanhakabir	e6d54b0c33	remove test logs	2021-04-17 09:44:17 -07:00
tanhakabir	7a1e5bca74	put all playernode actions on a queue	2021-04-17 09:35:42 -07:00
tanhakabir	1996812c90	checkpoint	2021-04-17 09:17:19 -07:00
tanhakabir	6e1f8f12d4	fix crash	2021-04-16 18:03:34 -07:00
tanhakabir	625e1ab169	remove unused code	2021-04-16 17:30:09 -07:00
tanhakabir	52c33518ad	add option to change bitrate for radio	2021-04-16 17:20:48 -07:00
tanhakabir	3f6fc327ff	remove network data wrapper, seeking broken	2021-04-16 16:17:36 -07:00
tanhakabir	e3e4e4dd46	Release 4.2.0	2021-04-16 10:05:57 -07:00
tanhakabir	b60e567a83	fix recursive polling logic (#91 )	2021-04-16 10:05:21 -07:00
tanhakabir	17e0ee5dd8	Update example app to include a radio stream link (#89 ) * update links * update example app to show podcast, soundbite, and radio	2021-04-06 21:16:13 -07:00
tanhakabir	97909bacce	Release 4.1.0	2021-03-22 23:04:53 -07:00
tanhakabir	30b0189f61	Merge Fix PCM memory leak #87	2021-03-22 23:01:35 -07:00
tanhakabir	5bde849bf0	fix PCM memory leak	2021-03-22 23:00:35 -07:00
tanhakabir	b3b519ab4c	Revert "audio skips, but reusing same pcm buffers" This reverts commit `f3b62cc756`.	2021-03-22 22:49:31 -07:00
tanhakabir	f3b62cc756	audio skips, but reusing same pcm buffers	2021-03-22 11:52:29 -07:00
tanhakabir	a56d3314ad	Update README.md	2021-03-22 11:50:53 -07:00
tanhakabir	f75d743cd9	small refractor	2021-03-20 11:59:06 -07:00
tanhakabir	f8876d821e	remove unnecessary recursion helper	2021-03-20 11:54:56 -07:00
tanhakabir	bca8fde2de	Release 4.0.0	2021-03-18 00:57:00 -07:00
tanhakabir	efbaa465b2	remove unused functions	2021-03-18 00:44:30 -07:00
tanhakabir	20f1d72058	implement basic autoplay	2021-03-18 00:44:30 -07:00
tanhakabir	6c3b1efe97	fully implement queuing audio	2021-03-18 00:44:30 -07:00
tanhakabir	a98f090b6a	checkpoint, timer has strong reference to engine	2021-03-18 00:44:30 -07:00
tanhakabir	542f65f044	add initial queuing functionality from Joe but this will crash Co-Authored-By: Joe Williams <14778951+jw1540@users.noreply.github.com>	2021-03-18 00:44:30 -07:00
tanhakabir	f4a1141f65	clean up project	2021-03-18 00:44:30 -07:00
tanhakabir	a034c7dc6f	reset project settings	2021-03-18 00:44:30 -07:00
tanhakabir	d9c6d18921	Fix initial state of feature switches to off	2021-03-10 17:41:53 -08:00
tanhakabir	7eb3d601fa	Add minor documentation to skip silences feature Co-Authored-By: Joe Williams <14778951+jw1540@users.noreply.github.com>	2021-03-10 14:43:19 -08:00
tanhakabir	9b375b99dc	Release 3.0.0	2021-03-10 14:37:13 -08:00
tanhakabir	ee80976e92	add sleep timer feature Co-Authored-By: Joe Williams <14778951+jw1540@users.noreply.github.com>	2021-03-10 14:25:43 -08:00
tanhakabir	10aea39cae	expose ID for current player	2021-03-10 14:25:43 -08:00
tanhakabir	431fdc6428	add rate as a core property of SAPlayer (#78 )	2021-03-10 14:05:58 -08:00
tanhakabir	eda60a3c3d	remove random audio modifiers to see skip silences in work	2021-03-10 12:59:02 -08:00
tanhakabir	d7b90f1f58	use Joe's original rate for speeding through silences Co-Authored-By: Joe Williams <14778951+jw1540@users.noreply.github.com>	2021-03-10 12:59:02 -08:00
tanhakabir	08b30307aa	Add PR from Joe for skipping silences Co-Authored-By: Joe Williams <14778951+jw1540@users.noreply.github.com>	2021-03-10 12:59:02 -08:00
tanhakabir	751ca765d5	Release 2.13.0	2021-03-06 19:51:39 -08:00
tanhakabir	68ea5a9468	fix crash on uncompressed audio (#69 )	2021-03-06 19:50:18 -08:00
tanhakabir	46ab845c8e	Release 2.12.0	2021-02-22 22:47:40 -08:00
tanhakabir	b597704115	Fix locating files in downloads Co-Authored-By: fayinsky <38639193+fayinsky@users.noreply.github.com>	2021-02-22 22:42:27 -08:00
tanhakabir	889e2257ab	Add documentation for supported file types (#63 )	2021-02-22 22:37:26 -08:00
tanhakabir	e962008b4c	Fix freezing on seek (#62 )	2021-02-22 22:32:54 -08:00
tanhakabir	d6c1d13d7d	create API for setting preference for downloading on cellular data (#61 ) * set cellular downloads to true to allow for simulator downloads * add documentation	2021-02-22 22:13:36 -08:00
tanhakabir	922a794d09	remove noisey logs	2021-02-22 21:48:34 -08:00
tanhakabir	96092a208c	Add files per Xcode 9.3	2021-02-22 17:37:07 -08:00
tanhakabir	b71729035d	Open up access to playerNode (#60 )	2021-02-22 17:34:59 -08:00
tanhakabir	2abba6f0cc	Release 2.11.0	2020-10-22 12:22:20 -07:00
tanhakabir	f081b7549d	add endpoint to remove default pitch modifier (#51 )	2020-10-22 11:59:01 -07:00
tanhakabir	55fbae7b4a	Update README to include module name for import (#47 )	2020-09-19 16:02:46 -07:00
tanhakabir	2acbde2efa	Release 2.10.0	2020-09-19 15:52:25 -07:00
Moises Inzunza	acbdf05d4f	Fixed bug in swift 5.3 (#46 )	2020-09-19 12:19:50 -07:00