Merge pull request #141 from tanhakabir/issue-140

Refractor cache for broadcasting updates
Update README.md
2021-08-17 03:04:48 -07:00 · 2021-08-17 03:04:11 -07:00 · 2021-08-17 02:59:42 -07:00 · 2021-08-17 02:39:31 -07:00 · 2021-08-17 02:38:16 -07:00 · 2021-08-17 02:22:29 -07:00
34 changed files with 1610 additions and 678 deletions
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+		A470FEE2260303DA00F135FF /* Model.swift in Sources */ = {isa = PBXBuildFile; fileRef = A470FEE1260303DA00F135FF /* Model.swift */; };
 /* 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; };
 		607FACD01AFB9204008FA782 /* SwiftAudioPlayer_Example.app */ = {isa = PBXFileReference; explicitFileType = wrapper.application; includeInIndex = 0; path = SwiftAudioPlayer_Example.app; 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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@@ -54,7 +52,6 @@
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@@ -62,22 +59,12 @@
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 			runOnlyForDeploymentPostprocessing = 0;
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 /* End PBXFrameworksBuildPhase section */

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-		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 */,
 			);
@@ -1,9 +1,9 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<document type="com.apple.InterfaceBuilder3.CocoaTouch.Storyboard.XIB" version="3.0" toolsVersion="17701" targetRuntime="iOS.CocoaTouch" propertyAccessControl="none" useAutolayout="YES" useTraitCollections="YES" colorMatched="YES" initialViewController="vXZ-lx-hvc">
+<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="17703"/>
+        <plugIn identifier="com.apple.InterfaceBuilder.IBCocoaTouchPlugin" version="18093"/>
        <capability name="documents saved in the Xcode 8 format" minToolsVersion="8.0"/>
    </dependencies>
    <scenes>
@@ -72,27 +72,20 @@
                                <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>
                                    <action selector="audioSelected:" destination="vXZ-lx-hvc" eventType="valueChanged" id="oYE-yq-348"/>
                                </connections>
                            </segmentedControl>
                            <button opaque="NO" contentMode="scaleToFill" contentHorizontalAlignment="center" contentVerticalAlignment="center" buttonType="system" lineBreakMode="middleTruncation" translatesAutoresizingMaskIntoConstraints="NO" id="KDu-ea-kF8">
-                                <rect key="frame" x="78" y="123" width="69" height="30"/>
+                                <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="system" lineBreakMode="middleTruncation" translatesAutoresizingMaskIntoConstraints="NO" id="6d9-Bc-hIz">
-                                <rect key="frame" x="244" 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>
                            <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="419" width="69" height="21"/>
                                <fontDescription key="fontDescription" type="system" pointSize="17"/>
@@ -123,74 +116,110 @@
                                <nil key="textColor"/>
                                <nil key="highlightedColor"/>
                            </label>
-                            <label opaque="NO" userInteractionEnabled="NO" contentMode="left" horizontalHuggingPriority="251" verticalHuggingPriority="251" fixedFrame="YES" text="Skip Silences" textAlignment="natural" lineBreakMode="tailTruncation" baselineAdjustment="alignBaselines" adjustsFontSizeToFit="NO" translatesAutoresizingMaskIntoConstraints="NO" id="M2y-FP-H1D">
+                            <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"/>
-                                <autoresizingMask key="autoresizingMask" flexibleMaxX="YES" flexibleMaxY="YES"/>
                                <fontDescription key="fontDescription" type="system" pointSize="17"/>
                                <nil key="textColor"/>
                                <nil key="highlightedColor"/>
                            </label>
-                            <switch opaque="NO" contentMode="scaleToFill" horizontalHuggingPriority="750" verticalHuggingPriority="750" fixedFrame="YES" contentHorizontalAlignment="center" contentVerticalAlignment="center" on="YES" translatesAutoresizingMaskIntoConstraints="NO" id="2cn-E5-TeQ">
-                                <rect key="frame" x="226" y="499" width="49" height="31"/>
-                                <autoresizingMask key="autoresizingMask" flexibleMaxX="YES" flexibleMaxY="YES"/>
+                            <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" fixedFrame="YES" contentHorizontalAlignment="center" contentVerticalAlignment="center" on="YES" translatesAutoresizingMaskIntoConstraints="NO" id="IGe-aU-Y6D">
-                                <rect key="frame" x="226" y="540" width="49" height="31"/>
-                                <autoresizingMask key="autoresizingMask" flexibleMaxX="YES" flexibleMaxY="YES"/>
+                            <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" fixedFrame="YES" text="Sleep After 5 s" textAlignment="natural" lineBreakMode="tailTruncation" baselineAdjustment="alignBaselines" adjustsFontSizeToFit="NO" translatesAutoresizingMaskIntoConstraints="NO" id="vf6-kr-yWa">
+                            <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"/>
-                                <autoresizingMask key="autoresizingMask" flexibleMaxX="YES" flexibleMaxY="YES"/>
                                <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"/>
@@ -203,6 +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"/>
@@ -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 {
@@ -104,85 +70,17 @@ class ViewController: UIViewController {
        super.viewDidLoad()
        
        SAPlayer.Downloader.allowUsingCellularData = true
+        SAPlayer.shared.HTTPHeaderFields = ["User-Agent": "foobar"]
        
-        SAPlayer.shared.DEBUG_MODE = true
+//        SAPlayer.shared.DEBUG_MODE = true
        
        isPlayable = false
-        selectedAudio = AudioInfo(index: 0)
+        checkIfAudioDownloaded()
+        selectAudio(atIndex: 0)
        
 //        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() {
@@ -209,12 +107,130 @@ class ViewController: UIViewController {
    @IBAction func audioSelected(_ sender: Any) {
        let selected = audioSelector.selectedSegmentIndex
        
-        selectedAudio = AudioInfo(index: selected)
-        
-        SAPlayer.shared.mediaInfo = SALockScreenInfo(title: selectedAudio.title, artist: selectedAudio.artist, artwork: UIImage(), releaseDate: selectedAudio.releaseDate)
-        
-        //        if let savedUrl = savedUrls[selectedAudio] {}
+        selectAudio(atIndex: selected)
    }
+    
+    func selectAudio(atIndex i: Int) {
+        selectedAudio.setIndex(i)
+        
+        if selectedAudio.savedUrl != nil {
+            downloadButton.isEnabled = true
+            downloadButton.setTitle("Delete downloaded", for: .normal)
+            streamButton.isEnabled = false
+        } else {
+            downloadButton.isEnabled = true
+            downloadButton.setTitle("Download", for: .normal)
+            streamButton.isEnabled = true
+        }
+    }
+    
+    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] (duration) in
+            guard let self = self else { return }
+            self.durationLabel.text = SAPlayer.prettifyTimestamp(duration)
+            self.duration = duration
+        }
+        
+        elapsedId = SAPlayer.Updates.ElapsedTime.subscribe { [weak self] (position) in
+            guard let self = self 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] (buffer) in
+            guard let self = self else { 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] (playing) in
+            guard let self = self 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] 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)
+            }
+            
+            self.currentUrlLocationLabel.text = "\(forthcomingPlaybackUrl.absoluteString)"
+        }
+    }
+    
+    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
    }
@@ -229,7 +245,12 @@ class ViewController: UIViewController {
    @IBAction func rateChanged(_ sender: Any) {
        let speed = rateSlider.value
        rateLabel.text = "rate: \(speed)x"
-        SAPlayer.shared.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) {
        let reverb = reverbSlider.value
@@ -238,11 +259,21 @@ 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
@@ -253,9 +284,7 @@ class ViewController: UIViewController {
                    guard let self = self else { return }
                    DispatchQueue.main.async {
                        self.currentUrlLocationLabel.text = "saved to: \(url.lastPathComponent)"
-                        self.savedUrls[self.selectedAudio] = url
-                        
-                        SAPlayer.shared.startSavedAudio(withSavedUrl: url)
+                        self.selectedAudio.addSavedUrl(url)
                    }
                })
                streamButton.isEnabled = false
@@ -270,7 +299,14 @@ class ViewController: UIViewController {
    
    @IBAction func streamTouched(_ sender: Any) {
        if !isStreaming {
-            SAPlayer.shared.startRemoteAudio(withRemoteUrl: selectedAudio.url)
+            self.currentUrlLocationLabel.text = "remote url: \(selectedAudio.url.absoluteString)"
+            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
@@ -325,5 +361,18 @@ class ViewController: UIViewController {
            _ = 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

@@ -61,19 +78,16 @@ To receive streaming progress (for buffer progress %):
 override func viewDidLoad() {
    super.viewDidLoad()
    
-    _ = SAPlayer.Updates.StreamingBuffer.subscribe{ [weak self] (url, buffer) in
+    _ = SAPlayer.Updates.StreamingBuffer.subscribe{ [weak self] buffer in
        guard let self = self else { return }
-        guard url == self.selectedAudioUrl else { return }

-        let progress = Float((buffer.totalDurationBuffered + buffer.startingBufferTimePositon) / self.duration)
-
-        self.bufferProgress.progress = progress
+        self.bufferProgress.progress = Float(buffer.bufferingProgress)

        self.isPlayable = buffer.isReadyForPlaying
    }
 }
 ```
-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:
@@ -98,18 +112,12 @@ 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

@@ -131,9 +139,9 @@ Known supported file types are `.mp3` and `.wav`.

 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.

@@ -147,6 +155,18 @@ 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)
+```
+
+You can also directly access and modify the queue from `SAPlayer.shared.audioQueued`.
+
 #### 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.
@@ -236,14 +256,16 @@ Receive updates for changing values from the player, such as the duration, elaps

 All subscription functions for updates take the form of:
 ```swift
-func subscribe(_ closure: @escaping (_ url: URL, _ payload:  <Payload>) -> ()) -> UInt
+func subscribe(_ closure: @escaping (_ payload:  <Payload>) -> ()) -> UInt
 ```

 - `closure`: The closure that will receive the updates. It's recommended to have a weak reference to a class that uses these functions.
- `url`: The corresponding remote URL for the update. In the case there might be multiple files observed, such as downloading many files at once or switching over from playing one audio to another and the updates corresponding to the previous aren't silenced on switch-over.
 - `payload`: The updated value.
 - Returns: the id for the subscription in the case you would like to unsubscribe to updates for the closure.

+Sometimes there is:
+- `url`: The corresponding remote URL for the update. In the case there might be multiple files observed, such as downloading many files at once.
+
 Similarily unsubscribe takes the form of: 
 ```swift
 func unsubscribe(_ id: UInt)
@@ -281,6 +303,11 @@ Payload = `Double`

 Changes in the progress of downloading audio in the background. This does not correspond to progress in streaming downloads, look at StreamingBuffer for streaming progress.

+### AudioQueue
+Payload = `URL`
+
+Notification of the URL of the upcoming audio to be played. This URL may be remote or locally saved.
+
 ## Audio Effects

 ### Realtime Audio Manipulation
@@ -28,6 +28,12 @@ import CoreMedia

 class AudioClockDirector {
    static let shared = AudioClockDirector()
+    private var currentAudioKey: Key?
+    
+    private var depNeedleClosures: DirectorThreadSafeClosuresDeprecated<Needle> = DirectorThreadSafeClosuresDeprecated()
+    private var depDurationClosures: DirectorThreadSafeClosuresDeprecated<Duration> = DirectorThreadSafeClosuresDeprecated()
+    private var depPlayingStatusClosures: DirectorThreadSafeClosuresDeprecated<SAPlayingStatus> = DirectorThreadSafeClosuresDeprecated()
+    private var depBufferClosures: DirectorThreadSafeClosuresDeprecated<SAAudioAvailabilityRange> = DirectorThreadSafeClosuresDeprecated()
    
    private var needleClosures: DirectorThreadSafeClosures<Needle> = DirectorThreadSafeClosures()
    private var durationClosures: DirectorThreadSafeClosures<Duration> = DirectorThreadSafeClosures()
@@ -36,9 +42,23 @@ class AudioClockDirector {
    
    private init() {}
    
-    func create() {}
+    func setKey(_ key: Key) {
+        currentAudioKey = key
+    }
+    
+    func resetCache() {
+        needleClosures.resetCache()
+        durationClosures.resetCache()
+        playingStatusClosures.resetCache()
+        bufferClosures.resetCache()
+    }
    
    func clear() {
+        depNeedleClosures.clear()
+        depDurationClosures.clear()
+        depPlayingStatusClosures.clear()
+        depBufferClosures.clear()
+        
        needleClosures.clear()
        durationClosures.clear()
        playingStatusClosures.clear()
@@ -48,43 +68,67 @@ class AudioClockDirector {
    // MARK: - Attaches
    
    // Needle
+    @available(*, deprecated, message: "Use subscribe without key in the closure for current audio updates")
    func attachToChangesInNeedle(closure: @escaping (Key, Needle) throws -> Void) -> UInt {
+        return depNeedleClosures.attach(closure: closure)
+    }
+    
+    func attachToChangesInNeedle(closure: @escaping (Needle) throws -> Void) -> UInt {
        return needleClosures.attach(closure: closure)
    }
    
    
    // Duration
+    @available(*, deprecated, message: "Use subscribe without key in the closure for current audio updates")
    func attachToChangesInDuration(closure: @escaping (Key, Duration) throws -> Void) -> UInt {
+        return depDurationClosures.attach(closure: closure)
+    }
+    
+    func attachToChangesInDuration(closure: @escaping (Duration) throws -> Void) -> UInt {
        return durationClosures.attach(closure: closure)
    }
    
    
    // Playing status
+    @available(*, deprecated, message: "Use subscribe without key in the closure for current audio updates")
    func attachToChangesInPlayingStatus(closure: @escaping (Key, SAPlayingStatus) throws -> Void) -> UInt{
+        return depPlayingStatusClosures.attach(closure: closure)
+    }
+    
+    func attachToChangesInPlayingStatus(closure: @escaping (SAPlayingStatus) throws -> Void) -> UInt{
        return playingStatusClosures.attach(closure: closure)
    }
    
    
    // Buffer
+    @available(*, deprecated, message: "Use subscribe without key in the closure for current audio updates")
    func attachToChangesInBufferedRange(closure: @escaping (Key, SAAudioAvailabilityRange) throws -> Void) -> UInt{
+        return depBufferClosures.attach(closure: closure)
+    }
+    
+    func attachToChangesInBufferedRange(closure: @escaping (SAAudioAvailabilityRange) throws -> Void) -> UInt{
        return bufferClosures.attach(closure: closure)
    }
    
    
    // MARK: - Detaches
    func detachFromChangesInNeedle(withID id: UInt) {
+        depNeedleClosures.detach(id: id)
        needleClosures.detach(id: id)
    }
    
    func detachFromChangesInDuration(withID id: UInt) {
+        depDurationClosures.detach(id: id)
        durationClosures.detach(id: id)
    }
    
    func detachFromChangesInPlayingStatus(withID id: UInt) {
+        depPlayingStatusClosures.detach(id: id)
        playingStatusClosures.detach(id: id)
    }
    
    func detachFromChangesInBufferedRange(withID id: UInt) {
+        depBufferClosures.detach(id: id)
        bufferClosures.detach(id: id)
    }
 }
@@ -92,24 +136,44 @@ class AudioClockDirector {
 // MARK: - Receives notifications from AudioEngine on ticks
 extension AudioClockDirector {
    func needleTick(_ key: Key, needle: Needle) {
-        needleClosures.broadcast(key: key, payload: needle)
+        guard key == currentAudioKey else {
+            Log.debug("silence old updates")
+            return
+        }
+        depNeedleClosures.broadcast(key: key, payload: needle)
+        needleClosures.broadcast(payload: needle)
    }
 }

 extension AudioClockDirector {
    func durationWasChanged(_ key: Key, duration: Duration) {
-        durationClosures.broadcast(key: key, payload: duration)
+        guard key == currentAudioKey else {
+            Log.debug("silence old updates")
+            return
+        }
+        depDurationClosures.broadcast(key: key, payload: duration)
+        durationClosures.broadcast(payload: duration)
    }
 }

 extension AudioClockDirector {
    func audioPlayingStatusWasChanged(_ key: Key, status: SAPlayingStatus) {
-        playingStatusClosures.broadcast(key: key, payload: status)
+        guard key == currentAudioKey else {
+            Log.debug("silence old updates")
+            return
+        }
+        depPlayingStatusClosures.broadcast(key: key, payload: status)
+        playingStatusClosures.broadcast(payload: status)
    }
 }

 extension AudioClockDirector {
    func changeInAudioBuffered(_ key: Key, buffered: SAAudioAvailabilityRange) {
-        bufferClosures.broadcast(key: key, payload: buffered)
+        guard key == currentAudioKey else {
+            Log.debug("silence old updates")
+            return
+        }
+        depBufferClosures.broadcast(key: key, payload: buffered)
+        bufferClosures.broadcast(payload: buffered)
    }
 }
@@ -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 (URL) throws -> Void) -> UInt {
+        return closures.attach(closure: closure)
+    }
+
+    func detach(withID id: UInt) {
+        closures.detach(id: id)
+    }
+    
+    func changeInQueue(url: URL) {
+        closures.broadcast(payload: url)
+    }
+}
@@ -28,7 +28,7 @@ import Foundation
 class DownloadProgressDirector {
    static let shared = DownloadProgressDirector()
    
-    var closures: DirectorThreadSafeClosures<Double> = DirectorThreadSafeClosures()
+    var closures: DirectorThreadSafeClosuresDeprecated<Double> = DirectorThreadSafeClosuresDeprecated()
    
    private init() {
        AudioDataManager.shared.attach { [weak self] (key, progress) in
@@ -0,0 +1,65 @@
+//
+//  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()
+    private var currentAudioKey: Key?
+    
+    var closures: DirectorThreadSafeClosures<Double> = DirectorThreadSafeClosures()
+    
+    private init() {}
+    
+    func setKey(_ key: Key) {
+        currentAudioKey = key
+    }
+    
+    func resetCache() {
+        closures.resetCache()
+    }
+    
+    func clear() {
+        closures.clear()
+    }
+    
+    func attach(closure: @escaping (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) {
+        guard key == currentAudioKey else {
+            Log.debug("silence old updates")
+            return
+        }
+        
+        closures.broadcast(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()
@@ -28,7 +28,7 @@ import AVFoundation

 protocol AudioEngineProtocol {
    var key: Key { get }
-    var engine: AVAudioEngine { get set }
+    var engine: AVAudioEngine! { get }
    func play()
    func pause()
    func seek(toNeedle needle: Needle)
@@ -36,7 +36,6 @@ protocol AudioEngineProtocol {
 }

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

@@ -44,10 +43,9 @@ class AudioEngine: AudioEngineProtocol {
    weak var delegate:AudioEngineDelegate?
    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)!
    
@@ -78,11 +76,7 @@ class AudioEngine: AudioEngineProtocol {
            guard playingStatus != oldValue, let status = playingStatus else {
                return
            }
-            
-            if status == .ended {
-                delegate?.didEndPlaying()
-            }
-            
+ 
            AudioClockDirector.shared.audioPlayingStatusWasChanged(key, status: status)
        }
    }
@@ -109,53 +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
@@ -169,7 +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()
                
@@ -200,6 +232,13 @@ class AudioEngine: AudioEngineProtocol {
    }
    
    func invalidate() {
-        
+        engineInvalidated = true
+        playerNode.stop()
+        engine.stop()
+
+        if let audioModifiers = audioModifiers, audioModifiers.count > 0 {
+            audioModifiers.forEach { engine.detach($0) }
+        }
+        Log.info("invalidated engine for key \(key)")
    }
 }
@@ -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 +140,57 @@ 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()
        }
        
+        StreamingDownloadDirector.shared.setKey(key)
+        StreamingDownloadDirector.shared.resetCache()
+        
+        streamChangeListenerId = StreamingDownloadDirector.shared.attach { [weak self] (progress) in
+            guard let self = self 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 +199,30 @@ 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 +238,6 @@ 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
@@ -300,8 +324,24 @@ class AudioStreamEngine: AudioEngine {
        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)
@@ -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()
            }
        }
    }
@@ -100,16 +103,9 @@ 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
@@ -122,6 +118,8 @@ class AudioParser: AudioParsable {
            //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
@@ -148,12 +146,29 @@ 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] (progress) in
+            guard let self = self 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 {
@@ -161,33 +176,61 @@ 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
@@ -199,9 +242,12 @@ 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? {
@@ -254,6 +300,12 @@ 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()
        
@@ -281,6 +333,32 @@ 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
@@ -288,27 +366,4 @@ 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)
-        }
-    }
 }
@@ -65,7 +65,7 @@ func parserPacket(_ context: UnsafeMutableRawPointer, _ byteCount: UInt32, _ pac
            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 { // not compressed audio (.wav)
        Log.debug("uncompressed audio")
@@ -75,7 +75,7 @@ func parserPacket(_ context: UnsafeMutableRawPointer, _ byteCount: UInt32, _ pac
            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]
    }
 }
@@ -31,6 +31,7 @@ protocol AudioDataManagable {
    
    var allowCellular: Bool { get set }
    
+    func setHTTPHeaderFields(_ fields: [String: String]?)
    func setBackgroundCompletionHandler(_ completionHandler: @escaping () -> ())
    func setAllowCellularDownloadPreference(_ preference: Bool)
    
@@ -96,6 +97,11 @@ class AudioDataManager: AudioDataManagable {
        streamingCallbacks = []
    }
    
+    func setHTTPHeaderFields(_ fields: [String: String]?) {
+        streamWorker.HTTPHeaderFields = fields
+        downloadWorker.HTTPHeaderFields = fields
+    }
+    
    func setBackgroundCompletionHandler(_ completionHandler: @escaping () -> ()) {
        backgroundCompletion = completionHandler
    }
@@ -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)
@@ -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.
     
@@ -81,19 +90,36 @@ public class SAPlayer {
    */
    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 {
@@ -106,13 +132,6 @@ public class SAPlayer {
            
            node.rate = value
            playbackRateOfAudioChanged(rate: value)
-            
-            // if skip silences was on, reset it to have the new rate
-            // TODO fix this to rate being broadcasted and handled in only Features.SkipSilences https://github.com/tanhakabir/SwiftAudioPlayer/issues/77
-//            if Features.SkipSilences.enabled && !(value == rate ?? 1.0 - 0.5 || value == rate ?? 1.0 + 0.5) {
-//                _ = Features.SkipSilences.disable()
-//                _ = Features.SkipSilences.enable()
-//            }
        }
    }
    
@@ -160,6 +179,11 @@ public class SAPlayer {
     */
    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.
     
@@ -205,11 +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)
@@ -227,6 +247,7 @@ public class SAPlayer {
        }
        
        audioModifiers.append(AVAudioUnitTimePitch(audioComponentDescription: componentDescription))
+        NotificationCenter.default.addObserver(self, selector: #selector(handleInterruption), name: AVAudioSession.interruptionNotification, object: nil)
    }
    
    /**
@@ -253,9 +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))"
    }
@@ -267,6 +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
@@ -379,12 +437,13 @@ extension SAPlayer {
     - 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)
    }
@@ -414,28 +473,72 @@ extension SAPlayer {
     - 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()
    }
 }
@@ -443,25 +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()
    }
@@ -469,24 +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()
@@ -24,20 +24,24 @@ extension SAPlayer {
        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.
             
-             - Important: The first audio modifier must be the default `AVAudioUnitTimePitch` that comes with the SAPlayer for this feature to work.
+             - 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
-                let originalRate = SAPlayer.shared.rate ?? 1.0
+                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
@@ -54,12 +58,12 @@ extension SAPlayer {

                    let meterLevel = self.scaledPower(power: avgPower)
                    Log.debug("meterLevel: \(meterLevel)")
-                    if meterLevel < 0.6 {
+                    if meterLevel < 0.6 { // below 0.6 decibels is below audible audio
                        SAPlayer.shared.rate = originalRate + 0.5
-                        Log.test("speed up rate to \(String(describing: SAPlayer.shared.rate))")
+                        Log.debug("speed up rate to \(String(describing: SAPlayer.shared.rate))")
                    } else {
                        SAPlayer.shared.rate = originalRate
-                        Log.test("slow down rate to \(String(describing: SAPlayer.shared.rate))")
+                        Log.debug("slow down rate to \(String(describing: SAPlayer.shared.rate))")
                    }
                }
                
@@ -69,17 +73,27 @@ extension SAPlayer {
            /**
             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.
             
-             - Important: The first audio modifier must be the default `AVAudioUnitTimePitch` that comes with the SAPlayer for this feature to work.
+             - 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 {
-                // TODO fix disabling on speed up portion and being stuck at faster speed https://github.com/tanhakabir/SwiftAudioPlayer/issues/76
                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
@@ -117,5 +131,37 @@ extension SAPlayer {
                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 {
+    public var loc: Location
+    public var url: URL
+    public var mediaInfo: SALockScreenInfo?
+    public 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.
+     */
+    public 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.
+     */
+    public enum Location {
+        case remote
+        case saved
+    }
+}
@@ -36,20 +36,53 @@ 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 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()
+        durationRef = AudioClockDirector.shared.attachToChangesInDuration(closure: { [weak self] (duration) in
+            guard let self = self else { throw DirectorError.closureIsDead }
+            
+            self.delegate?.updateLockscreenPlaybackDuration(duration: duration)
+            self.duration = duration
+            
+            self.delegate?.setLockScreenInfo(withMediaInfo: self.delegate?.mediaInfo, duration: duration)
+        })
+        
+        needleRef = AudioClockDirector.shared.attachToChangesInNeedle(closure: { [weak self] (needle) in
+            guard let self = self else { throw DirectorError.closureIsDead }
+            
+            self.needle = needle
+            self.delegate?.updateLockscreenElapsedTime(needle: needle)
+        })
+        
+        playingStatusRef = AudioClockDirector.shared.attachToChangesInPlayingStatus(closure: { [weak self] (isPlaying) in
+            guard let self = self else { throw DirectorError.closureIsDead }
+            
+            if(isPlaying == .paused && self.shouldPlayImmediately) {
+                self.shouldPlayImmediately = false
+                self.handlePlay()
+            }
+            
+            // solves bug nil == owningEngine || GetEngine() == owningEngine where too many
+            // ended statuses were notified to cause 2 engines to be initialized and causes an error.
+            // TODO don't need guard
+            guard isPlaying != self.isPlaying else { return }
+            self.isPlaying = isPlaying
+            
+            if(self.isPlaying == .ended) {
+                self.playNextAudioIfExists()
+            }
+        })
    }
    
    func getUrl(forKey key: Key) -> URL? {
@@ -61,82 +94,62 @@ class SAPlayerPresenter {
    }
    
    func handleClear() {
+        delegate?.clearEngine()
+        AudioClockDirector.shared.resetCache()
+        
        needle = nil
        duration = nil
        key = nil
-        mediaInfo = nil
+        delegate?.mediaInfo = nil
        delegate?.clearLockScreenInfo()
-        
-        AudioClockDirector.shared.detachFromChangesInDuration(withID: durationRef)
-        AudioClockDirector.shared.detachFromChangesInNeedle(withID: needleRef)
-        AudioClockDirector.shared.detachFromChangesInPlayingStatus(withID: playingStatusRef)
    }
    
    func handlePlaySavedAudio(withSavedUrl url: URL) {
-        attachForUpdates(url: url)
+        resetCacheForNewAudio(url: url)
        delegate?.startAudioDownloaded(withSavedUrl: url)
    }
    
-    func handlePlayStreamedAudio(withRemoteUrl url: URL) {
-        attachForUpdates(url: url)
-        delegate?.startAudioStreamed(withRemoteUrl: url)
+    func handlePlayStreamedAudio(withRemoteUrl url: URL, bitrate: SAPlayerBitrate) {
+        resetCacheForNewAudio(url: url)
+        delegate?.startAudioStreamed(withRemoteUrl: url, bitrate: bitrate)
    }
    
-    private func attachForUpdates(url: URL) {
-        detachFromUpdates()
-        
+    private func resetCacheForNewAudio(url: URL) {
        self.key = url.key
        urlKeyMap[url.key] = url
        
-        durationRef = AudioClockDirector.shared.attachToChangesInDuration(closure: { [weak self] (key, duration) in
-            guard let self = self else { throw DirectorError.closureIsDead }
-            guard key == self.key else {
-                Log.debug("misfire expected key: \(self.key ?? "none") payload key: \(key)")
-                return
-            }
-            
-            self.delegate?.updateLockscreenPlaybackDuration(duration: duration)
-            self.duration = duration
-            
-            self.delegate?.setLockScreenInfo(withMediaInfo: self.mediaInfo, duration: duration)
-        })
-        
-        needleRef = AudioClockDirector.shared.attachToChangesInNeedle(closure: { [weak self] (key, needle) in
-            guard let self = self else { throw DirectorError.closureIsDead }
-            guard key == self.key else {
-                Log.debug("misfire expected key: \(self.key ?? "none") payload key: \(key)")
-                return
-            }
-            
-            self.needle = needle
-            self.delegate?.updateLockscreenElapsedTime(needle: needle)
-        })
-        
-        playingStatusRef = AudioClockDirector.shared.attachToChangesInPlayingStatus(closure: { [weak self] (key, isPlaying) in
-            guard let self = self else { throw DirectorError.closureIsDead }
-            guard key == self.key else {
-                Log.debug("misfire expected key: \(self.key ?? "none") payload key: \(key)")
-                return
-            }
-            
-            self.isPlaying = isPlaying
-        })
+        AudioClockDirector.shared.setKey(url.key)
+        AudioClockDirector.shared.resetCache()
    }
    
-    private func detachFromUpdates() {
-        AudioClockDirector.shared.detachFromChangesInDuration(withID: durationRef)
-        AudioClockDirector.shared.detachFromChangesInNeedle(withID: needleRef)
-        AudioClockDirector.shared.detachFromChangesInPlayingStatus(withID: playingStatusRef)
+    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
    }
    
    func handleStopStreamingAudio() {
        delegate?.clearEngine()
-        detachFromUpdates()
-    }
-    
-    @available(iOS 10.0, *)
-    func handleLockscreenInfo(info: SALockScreenInfo?) {
-        self.mediaInfo = info
+        AudioClockDirector.shared.resetCache()
    }
 }

@@ -196,17 +209,34 @@ 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()
+
+        Log.info("getting ready to play \(nextAudioURL)")
+        AudioQueueDirector.shared.changeInQueue(url: nextAudioURL.url)
+        
+        handleClear()
+        
+        delegate?.mediaInfo = nextAudioURL.mediaInfo
+        
+        switch nextAudioURL.loc {
+        case .remote:
+            handlePlayStreamedAudio(withRemoteUrl: nextAudioURL.url, bitrate: nextAudioURL.bitrate)
+            break
+        case .saved:
+            handlePlaySavedAudio(withSavedUrl: nextAudioURL.url)
+            break
+        }
+        
+        shouldPlayImmediately = true
    }
 }
@@ -47,6 +47,7 @@ extension SAPlayer {
             - Parameter timePosition: The current time within the audio that is playing.
             - Returns: the id for the subscription in the case you would like to unsubscribe to updates for the closure.
             */
+            @available(*, deprecated, message: "Use subscribe without the url in the closure for current audio updates")
            public static func subscribe(_ closure: @escaping (_ url: URL, _ timePosition:  Double) -> ()) -> UInt {
                return AudioClockDirector.shared.attachToChangesInNeedle(closure: { (key, needle) in
                    guard let url = SAPlayer.shared.getUrl(forKey: key) else { return }
@@ -54,6 +55,19 @@ extension SAPlayer {
                })
            }
            
+            /**
+             Subscribe to updates in elapsed time of the playing audio. Aka, the current timestamp of the audio.
+             
+             - 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 time.
+             - Parameter timePosition: The current time within the audio that is playing.
+             - 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 (_ timePosition:  Double) -> ()) -> UInt {
+                AudioClockDirector.shared.attachToChangesInNeedle(closure: closure)
+            }
+            
            /**
             Stop recieving updates of changes in elapsed time of audio.
             
@@ -83,6 +97,7 @@ extension SAPlayer {
             - Parameter duration: The duration of the current initialized audio.
             - Returns: the id for the subscription in the case you would like to unsubscribe to updates for the closure.
             */
+            @available(*, deprecated, message: "Use subscribe without the url in the closure for current audio updates")
            public static func subscribe(_ closure: @escaping (_ url: URL, _ duration: Double) -> ()) -> UInt {
                return AudioClockDirector.shared.attachToChangesInDuration(closure: { (key, duration) in
                    guard let url = SAPlayer.shared.getUrl(forKey: key) else { return }
@@ -90,6 +105,21 @@ extension SAPlayer {
                })
            }
            
+            /**
+             Subscribe to updates to changes in duration of the current audio initialized.
+             
+             - Note: If you are streaming from a source that does not have an expected size at the beginning of a stream, such as live streams, duration will be constantly updating to best known value at the time (which is the seconds buffered currently and not necessarily the actual total duration of audio).
+             
+             - 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 duration: The duration of the current initialized audio.
+             - 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 (_ duration: Double) -> ()) -> UInt {
+                return AudioClockDirector.shared.attachToChangesInDuration(closure: closure)
+            }
+            
            /**
             Stop recieving updates of changes in duration of the current initialized audio.
             
@@ -115,6 +145,7 @@ extension SAPlayer {
             - Parameter playingStatus: Whether the player is playing audio or paused.
             - Returns: the id for the subscription in the case you would like to unsubscribe to updates for the closure.
             */
+            @available(*, deprecated, message: "Use subscribe without the url in the closure for current audio updates")
            public static func subscribe(_ closure: @escaping (_ url: URL, _ playingStatus: SAPlayingStatus) -> ()) -> UInt {
                return AudioClockDirector.shared.attachToChangesInPlayingStatus(closure: { (key, isPlaying) in
                    guard let url = SAPlayer.shared.getUrl(forKey: key) else { return }
@@ -122,6 +153,19 @@ extension SAPlayer {
                })
            }
            
+            /**
+             Subscribe to updates to changes in the playing/paused status of audio.
+             
+             - 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 playingStatus: Whether the player is playing audio or paused.
+             - 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 (_ playingStatus: SAPlayingStatus) -> ()) -> UInt {
+                return AudioClockDirector.shared.attachToChangesInPlayingStatus(closure: closure)
+            }
+            
            /**
             Stop recieving updates of changes in the playing/paused status of audio.
             
@@ -149,6 +193,7 @@ extension SAPlayer {
             - Parameter buffer: Availabity of audio that has been downloaded to play.
             - Returns: the id for the subscription in the case you would like to unsubscribe to updates for the closure.
             */
+            @available(*, deprecated, message: "Use subscribe without the url in the closure for current audio updates")
            public static func subscribe(_ closure: @escaping (_ url: URL, _ buffer: SAAudioAvailabilityRange) -> ()) -> UInt {
                return AudioClockDirector.shared.attachToChangesInBufferedRange(closure: { (key, buffer) in
                    guard let url = SAPlayer.shared.getUrl(forKey: key) else { return }
@@ -156,6 +201,21 @@ extension SAPlayer {
                })
            }
            
+            /**
+             Subscribe to updates to changes in the progress of downloading audio for streaming. Information about range of audio available and if the audio is playable. Look at SAAudioAvailabilityRange for more information. For progress of downloading audio that saves to the phone for playback later, look at AudioDownloading instead.
+             
+             - Note: For live streams that don't have an expected audio length from the beginning of the stream; the duration is constantly changing and equal to the total seconds buffered from the SAAudioAvailabilityRange.
+             
+             - 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 buffer: Availabity of audio that has been downloaded to play.
+             - 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 (_ buffer: SAAudioAvailabilityRange) -> ()) -> UInt {
+                return AudioClockDirector.shared.attachToChangesInBufferedRange(closure: closure)
+            }
+            
            /**
             Stop recieving updates of changes in streaming progress.
             
@@ -197,6 +257,28 @@ 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 (_ newUrl: URL) -> ()) -> UInt {
+                return AudioQueueDirector.shared.attach(closure: closure)
+            }
+
+            /**
+             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)
+            }
+        }
    }
 }

@@ -25,18 +25,15 @@

 import Foundation

-enum DirectorError: Error {
-    case closureIsDead
-}

 /**
 P for payload
 */
 class DirectorThreadSafeClosures<P>  {
-    typealias TypeClosure = (Key, P) throws -> Void
+    typealias TypeClosure = (P) throws -> Void
    private var queue: DispatchQueue = DispatchQueue(label: "SwiftAudioPlayer.thread_safe_map", attributes: .concurrent)
    private var closures: [UInt: TypeClosure] = [:]
-    private var cache: [Key: P] = [:]
+    private var cache: P? = nil
    
    var count: Int {
        get {
@@ -44,13 +41,17 @@ class DirectorThreadSafeClosures<P>  {
        }
    }
    
-    func broadcast(key: Key, payload: P) {
+    func resetCache() {
+        cache = nil
+    }
+    
+    func broadcast(payload: P) {
        queue.sync {
-            self.cache[key] = payload
+            self.cache = payload
            var iterator = self.closures.makeIterator()
            while let element = iterator.next() {
                do {
-                    try element.value(key, payload)
+                    try element.value(payload)
                } catch {
                    helperRemove(withKey: element.key)
                }
@@ -64,9 +65,9 @@ class DirectorThreadSafeClosures<P>  {
        
        //The director may not yet have the status yet. We should only call the closure if we have it
        //Let the caller know the immediate value. If it's dead already then stop
-        for (key, val) in cache {
+        if let val = cache {
            do {
-                try closure(key, val)
+                try closure(val)
            } catch {
                return id
            }
@@ -85,7 +86,7 @@ class DirectorThreadSafeClosures<P>  {
    func clear() {
        queue.async(flags: .barrier) {
            self.closures.removeAll()
-            self.cache.removeAll()
+            self.cache = nil
        }
    }
    
@@ -0,0 +1,103 @@
+//
+//  DirectorThreadSafeClosures.swift
+//  SwiftAudioPlayer
+//
+//  Created by Tanha Kabir on 2019-01-29.
+//  Copyright © 2019 Tanha Kabir, Jon Mercer
+//
+//  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
+
+enum DirectorError: Error {
+    case closureIsDead
+}
+
+/**
+ P for payload
+ */
+class DirectorThreadSafeClosuresDeprecated<P>  {
+    typealias TypeClosure = (Key, P) throws -> Void
+    private var queue: DispatchQueue = DispatchQueue(label: "SwiftAudioPlayer.thread_safe_map", attributes: .concurrent)
+    private var closures: [UInt: TypeClosure] = [:]
+    private var cache: [Key: P] = [:]
+    
+    var count: Int {
+        get {
+            return closures.count
+        }
+    }
+    
+    func broadcast(key: Key, payload: P) {
+        queue.sync {
+            self.cache[key] = payload
+            var iterator = self.closures.makeIterator()
+            while let element = iterator.next() {
+                do {
+                    try element.value(key, payload)
+                } catch {
+                    helperRemove(withKey: element.key)
+                }
+            }
+        }
+    }
+    
+    //UInt is actually 64-bits on modern devices
+    func attach(closure: @escaping TypeClosure) -> UInt {
+        let id: UInt = Date.getUTC64()
+        
+        //The director may not yet have the status yet. We should only call the closure if we have it
+        //Let the caller know the immediate value. If it's dead already then stop
+        for (key, val) in cache {
+            do {
+                try closure(key, val)
+            } catch {
+                return id
+            }
+        }
+        
+        //Replace what's in the map with the new closure
+        helperInsert(withKey: id, closure: closure)
+        
+        return id
+    }
+    
+    func detach(id: UInt) {
+        helperRemove(withKey: id)
+    }
+    
+    func clear() {
+        queue.async(flags: .barrier) {
+            self.closures.removeAll()
+            self.cache.removeAll()
+        }
+    }
+    
+    private func helperRemove(withKey key: UInt) {
+        queue.async(flags: .barrier) {
+            self.closures[key] = nil
+        }
+    }
+    
+    private func helperInsert(withKey key: UInt, closure: @escaping TypeClosure) {
+        queue.async(flags: .barrier) {
+            self.closures[key] = closure
+        }
+    }
+}
@@ -8,7 +8,7 @@

 Pod::Spec.new do |s|
  s.name             = 'SwiftAudioPlayer'
-  s.version          = '3.0.0'
+  s.version          = '6.4.0'
  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	764f0b130b	Merge pull request #141 from tanhakabir/issue-140 Refractor cache for broadcasting updates	2021-08-17 03:04:48 -07:00
tanhakabir	952dc1978f	Update README.md	2021-08-17 03:04:11 -07:00
tanhakabir	1752572770	clean up example app	2021-08-17 02:59:42 -07:00
tanhakabir	223600f30c	add deprecation warnings	2021-08-17 02:39:31 -07:00
tanhakabir	4d90c539cd	update streaming director to new broadcasting	2021-08-17 02:38:16 -07:00
tanhakabir	fd9b451f45	remove unnecessary key from queue director	2021-08-17 02:22:29 -07:00
tanhakabir	fd3e78f13c	refractor director broadcasting	2021-08-17 02:09:57 -07:00
tanhakabir	af3d553011	Release 6.4.0	2021-08-16 21:09:48 -07:00
tanhakabir	d0f9127c65	Merge pull request #139 from tanhakabir/issue-128 Fix runtime error on queuing audio.	2021-08-16 21:09:04 -07:00
tanhakabir	27d5ce4f03	fix error	2021-08-16 21:04:23 -07:00
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