version bump

AudioPlayer/AudioPlayer/Common/AudioContent.swift

@@ -19,6 +19,7 @@ enum AudioContent {
     case remoteWave
     case local
     case localWave
+    case loopBeatFlac
     case custom(String)
 
     var title: String {
@@ -49,6 +50,8 @@ enum AudioContent {
             return "Jazzy Frenchy"
         case .nonOptimized:
             return "Jazzy Frenchy"
+        case .loopBeatFlac:
+            return "Beat loop"
         case .custom(let url):
             return url
         }
@@ -82,6 +85,8 @@ enum AudioContent {
             return "Music by: bensound.com - m4a optimized"
         case .nonOptimized:
             return "Music by: bensound.com - m4a non-optimized"
+        case .loopBeatFlac:
+            return "Remote flac"
         case .custom:
             return ""
         }
@@ -117,6 +122,8 @@ enum AudioContent {
             return URL(fileURLWithPath: path)
         case .remoteWave:
             return URL(string: "https://github.com/dimitris-c/sample-audio/raw/main/5-MB-WAV.wav")!
+        case .loopBeatFlac:
+            return URL(string: "https://github.com/dimitris-c/sample-audio/raw/main/drumbeat-loop.flac")!
         case .custom(let url):
             return URL(string: url)!
         }

AudioPlayer/AudioPlayer/Content/AudioPlayer/AudioPlayerModel.swift

@@ -58,7 +58,7 @@ public class AudioPlayerModel {
 }
 
 private let radioTracks: [AudioContent] = [.offradio, .enlefko, .pepper966, .kosmos, .kosmosJazz, .radiox]
-private let audioTracks: [AudioContent] = [.khruangbin, .piano, .optimized, .nonOptimized, .remoteWave, .local, .localWave]
+private let audioTracks: [AudioContent] = [.khruangbin, .piano, .optimized, .nonOptimized, .remoteWave, .local, .localWave, .loopBeatFlac]
 
 func audioTracksProvider() -> [AudioPlaylist] {
     [

AudioStreaming.podspec

@@ -1,6 +1,6 @@
 Pod::Spec.new do |s|
   s.name = 'AudioStreaming'
-  s.version = '1.2.3'
+  s.version = '1.2.5'
   s.license = 'MIT'
   s.summary = 'An AudioPlayer/Streaming library for iOS written in Swift using AVAudioEngine.'
   s.homepage = 'https://github.com/dimitris-c/AudioStreaming'

AudioStreaming.xcodeproj/project.pbxproj

@@ -833,7 +833,7 @@
 					"@executable_path/Frameworks",
 					"@loader_path/Frameworks",
 				);
-				MARKETING_VERSION = 1.2.3;
+				MARKETING_VERSION = 1.2.5;
 				OTHER_LDFLAGS = "-ObjC";
 				PRODUCT_BUNDLE_IDENTIFIER = com.decimal.AudioStreaming;
 				PRODUCT_NAME = "$(TARGET_NAME:c99extidentifier)";
@@ -865,7 +865,7 @@
 					"@executable_path/Frameworks",
 					"@loader_path/Frameworks",
 				);
-				MARKETING_VERSION = 1.2.3;
+				MARKETING_VERSION = 1.2.5;
 				OTHER_LDFLAGS = "-ObjC";
 				PRODUCT_BUNDLE_IDENTIFIER = com.decimal.AudioStreaming;
 				PRODUCT_NAME = "$(TARGET_NAME:c99extidentifier)";

AudioStreaming/Core/Helpers/Lock.swift

@@ -4,6 +4,7 @@
 //
 
 import Foundation
+import os
 
 protocol Lock {
     func lock()
@@ -14,24 +15,96 @@ protocol Lock {
 
     // Execute a closure while acquiring a lock
     func withLock(body: () -> Void)
+
+    func deallocate()
 }
 
 /// A wrapper for `os_unfair_lock`
 /// - Tag: UnfairLock
 final class UnfairLock: Lock {
-    @usableFromInline let unfairLock: UnsafeMutablePointer<os_unfair_lock>
+
+    var unfairLock: Lock
+
+    init() {
+        if #available(iOS 16.0, *), #available(macOS 13.0, *) {
+            unfairLock = OSStorageLock()
+        } else {
+            unfairLock = UnfairStorageLock()
+        }
+    }
+
+    deinit {
+        deallocate()
+    }
+
+    func deallocate() {
+        unfairLock.deallocate()
+    }
+
+    @inlinable
+    func withLock<Result>(body: () throws -> Result) rethrows -> Result {
+        try unfairLock.withLock(body: body)
+    }
+
+    @inlinable
+    func withLock(body: () -> Void) {
+        unfairLock.withLock(body: body)
+    }
+
+    @inlinable
+    func lock() {
+        unfairLock.lock()
+    }
+
+    @inlinable
+    func unlock() {
+        unfairLock.unlock()
+    }
+}
+
+@available(iOS 16.0, *)
+@available(macOS 13, *)
+private class OSStorageLock: Lock {
+    @usableFromInline
+    let osLock = OSAllocatedUnfairLock()
+
+    @inlinable
+    func lock() {
+        osLock.lock()
+    }
+
+    @inlinable
+    func unlock() {
+        osLock.unlock()
+    }
+
+    func withLock<Result>(body: () throws -> Result) rethrows -> Result {
+        try osLock.withLockUnchecked(body)
+    }
+
+    func withLock(body: () -> Void) {
+        osLock.withLockUnchecked(body)
+    }
+
+    func deallocate() {} // no-op
+}
+
+private class UnfairStorageLock: Lock {
+
+    @usableFromInline
+    let unfairLock: UnsafeMutablePointer<os_unfair_lock>
 
     init() {
         unfairLock = .allocate(capacity: 1)
         unfairLock.initialize(to: os_unfair_lock())
     }
 
-    deinit {
+    func deallocate() {
+        unfairLock.deinitialize(count: 1)
         unfairLock.deallocate()
     }
 
     @inlinable
-    @inline(__always)
     func withLock<Result>(body: () throws -> Result) rethrows -> Result {
         os_unfair_lock_lock(unfairLock)
         defer { os_unfair_lock_unlock(unfairLock) }
@@ -39,7 +112,6 @@ final class UnfairLock: Lock {
     }
 
     @inlinable
-    @inline(__always)
     func withLock(body: () -> Void) {
         os_unfair_lock_lock(unfairLock)
         defer { os_unfair_lock_unlock(unfairLock) }
@@ -47,13 +119,11 @@ final class UnfairLock: Lock {
     }
 
     @inlinable
-    @inline(__always)
     func lock() {
         os_unfair_lock_lock(unfairLock)
     }
 
     @inlinable
-    @inline(__always)
     func unlock() {
         os_unfair_lock_unlock(unfairLock)
     }

AudioStreaming/Streaming/AudioPlayer/AudioPlayerConfiguration.swift

@@ -26,7 +26,7 @@ public struct AudioPlayerConfiguration: Equatable {
                                                            bufferSizeInSeconds: 10,
                                                            secondsRequiredToStartPlaying: 1,
                                                            gracePeriodAfterSeekInSeconds: 0.5,
-                                                           secondsRequiredToStartPlayingAfterBufferUnderrun: 1,
+                                                           secondsRequiredToStartPlayingAfterBufferUnderrun: 7,
                                                            enableLogs: false)
     /// Initializes the configuration for the `AudioPlayer`
     ///

AudioStreaming/Streaming/AudioPlayer/AudioPlayerState.swift

@@ -13,11 +13,11 @@ extension AudioPlayer {
 
         static let initial = InternalState([])
         static let running = InternalState(rawValue: 1)
-        static let playing = InternalState(rawValue: 1 << 1 | InternalState.running.rawValue)
-        static let rebuffering = InternalState(rawValue: 1 << 2 | InternalState.running.rawValue)
-        static let waitingForData = InternalState(rawValue: 1 << 3 | InternalState.running.rawValue)
-        static let waitingForDataAfterSeek = InternalState(rawValue: 1 << 4 | InternalState.running.rawValue)
-        static let paused = InternalState(rawValue: 1 << 5 | InternalState.running.rawValue)
+        static let playing = InternalState(rawValue: (1 << 1) | InternalState.running.rawValue)
+        static let rebuffering = InternalState(rawValue: (1 << 2) | InternalState.running.rawValue)
+        static let waitingForData = InternalState(rawValue: (1 << 3) | InternalState.running.rawValue)
+        static let waitingForDataAfterSeek = InternalState(rawValue: (1 << 4) | InternalState.running.rawValue)
+        static let paused = InternalState(rawValue: (1 << 5) | InternalState.running.rawValue)
         static let stopped = InternalState(rawValue: 1 << 9)
         static let pendingNext = InternalState(rawValue: 1 << 10)
         static let disposed = InternalState(rawValue: 1 << 30)

AudioStreaming/Streaming/AudioPlayer/AudioRendererContext.swift

@@ -20,9 +20,9 @@ final class AudioRendererContext {
 
     let packetsSemaphore = DispatchSemaphore(value: 0)
 
-    let framesRequiredToStartPlaying: UInt32
-    let framesRequiredAfterRebuffering: UInt32
-    let framesRequiredForDataAfterSeekPlaying: UInt32
+    let framesRequiredToStartPlaying: Double
+    let framesRequiredAfterRebuffering: Double
+    let framesRequiredForDataAfterSeekPlaying: Double
 
     let waitingForDataAfterSeekFrameCount = Atomic<Int32>(0)
 
@@ -33,9 +33,9 @@ final class AudioRendererContext {
 
         let canonicalStream = outputAudioFormat.basicStreamDescription
 
-        framesRequiredToStartPlaying = UInt32(canonicalStream.mSampleRate) * UInt32(configuration.secondsRequiredToStartPlaying)
-        framesRequiredAfterRebuffering = UInt32(canonicalStream.mSampleRate) * UInt32(configuration.secondsRequiredToStartPlayingAfterBufferUnderrun)
-        framesRequiredForDataAfterSeekPlaying = UInt32(canonicalStream.mSampleRate) * UInt32(configuration.gracePeriodAfterSeekInSeconds)
+        framesRequiredToStartPlaying = Double(canonicalStream.mSampleRate) * Double(configuration.secondsRequiredToStartPlaying)
+        framesRequiredAfterRebuffering = Double(canonicalStream.mSampleRate) * Double(configuration.secondsRequiredToStartPlayingAfterBufferUnderrun)
+        framesRequiredForDataAfterSeekPlaying = Double(canonicalStream.mSampleRate) * Double(configuration.gracePeriodAfterSeekInSeconds)
 
         let dataByteSize = Int(canonicalStream.mSampleRate * configuration.bufferSizeInSeconds) * Int(canonicalStream.mBytesPerFrame)
         inOutAudioBufferList = allocateBufferList(dataByteSize: dataByteSize)

AudioStreaming/Streaming/AudioPlayer/Processors/AudioFileStreamProcessor.swift

@@ -228,8 +228,9 @@ final class AudioFileStreamProcessor {
             processAudioDataPacketCount(entry: entry, fileStream: fileStream)
         case kAudioFileStreamProperty_ReadyToProducePackets:
             // check converter for discontinuous stream
-            processReadyToProducePackets(entry: entry, fileStream: fileStream)
+            assignMagicCookieToConverterIfNeeded()
             processPacketUpperBoundAndMaxPacketSize(entry: entry, fileStream: fileStream)
+            processReadyToProducePackets(entry: entry, fileStream: fileStream)
         case kAudioFileStreamProperty_FormatList:
             processFormatList(entry: entry, fileStream: fileStream)
         default:
@@ -242,7 +243,7 @@ final class AudioFileStreamProcessor {
     private func processDataOffset(entry: AudioEntry, fileStream: AudioFileStreamID) {
         var offset: UInt64 = 0
         fileStreamGetProperty(value: &offset, fileStream: fileStream, propertyId: kAudioFileStreamProperty_DataOffset)
-        entry.lock.lock(); defer { playerContext.audioReadingEntry?.lock.unlock() }
+        entry.lock.lock(); defer { entry.lock.unlock() }
         entry.audioStreamState.processedDataFormat = true
         entry.audioStreamState.dataOffset = offset
     }
@@ -253,7 +254,9 @@ final class AudioFileStreamProcessor {
         AudioFileStreamGetProperty(fileStream, kAudioFileStreamProperty_AudioDataPacketCount, &packetCountSize, &packetCount)
         entry.lock.lock(); defer { entry.lock.unlock() }
         entry.audioStreamState.dataPacketCount = Double(packetCount)
-        if entry.audioStreamFormat.mFormatID != kAudioFormatLinearPCM {
+        let entryFormatID = entry.audioStreamFormat.mFormatID
+        let isFLAC = entryFormatID == kAudioFormatFLAC
+        if entryFormatID != kAudioFormatLinearPCM && !isFLAC {
             discontinuous = true
         }
     }
@@ -370,6 +373,11 @@ final class AudioFileStreamProcessor {
         guard let entry = playerContext.audioReadingEntry else { return }
         guard entry.audioStreamState.processedDataFormat else { return }
 
+        guard let converter = audioConverter else {
+            Logger.error("Couldn't find audio converter", category: .audioRendering)
+            return
+        }
+
         if let playingEntry = playerContext.audioPlayingEntry,
            playingEntry.seekRequest.requested, playingEntry.calculatedBitrate() > 0
         {
@@ -380,25 +388,24 @@ final class AudioFileStreamProcessor {
             return
         }
 
-        guard let converter = audioConverter else {
-            Logger.error("Couldn't find audio converter", category: .audioRendering)
-            return
-        }
-
         // reset discontinuity
         discontinuous = false
 
-        var convertInfo = AudioConvertInfo(done: false,
-                                           numberOfPackets: inNumberPackets,
-                                           packDescription: inPacketDescriptions)
+        var convertInfo = AudioConvertInfo(
+            done: false,
+            numberOfPackets: inNumberPackets,
+            packDescription: inPacketDescriptions
+        )
         convertInfo.audioBuffer.mData = UnsafeMutableRawPointer(mutating: inInputData)
         convertInfo.audioBuffer.mDataByteSize = inNumberBytes
         if let playingAudioStreamFormat = playerContext.audioPlayingEntry?.audioStreamFormat {
             convertInfo.audioBuffer.mNumberChannels = playingAudioStreamFormat.mChannelsPerFrame
         }
 
-        updateProcessedPackets(inPacketDescriptions: inPacketDescriptions,
-                               inNumberPackets: inNumberPackets)
+        updateProcessedPackets(
+            inPacketDescriptions: inPacketDescriptions,
+            inNumberPackets: inNumberPackets
+        )
 
         var status: OSStatus = noErr
         packetProcess: while status == noErr {
@@ -406,7 +413,7 @@ final class AudioFileStreamProcessor {
             let bufferContext = rendererContext.bufferContext
             var used = bufferContext.frameUsedCount
             var start = bufferContext.frameStartIndex
-            var end = bufferContext.end
+            var end = (bufferContext.frameStartIndex + bufferContext.frameUsedCount) % bufferContext.totalFrameCount
 
             var framesLeftInBuffer = bufferContext.totalFrameCount - used
             rendererContext.lock.unlock()

AudioStreaming/Streaming/AudioPlayer/Processors/AudioPlayerRenderProcessor.swift

@@ -64,29 +64,30 @@ final class AudioPlayerRenderProcessor: NSObject {
         let frameSizeInBytes = bufferContext.sizeInBytes
         let used = bufferContext.frameUsedCount
         let start = bufferContext.frameStartIndex
-        let end = bufferContext.end
+        let end = (bufferContext.frameStartIndex + bufferContext.frameUsedCount) % bufferContext.totalFrameCount
         let signal = rendererContext.waiting.value && used < bufferContext.totalFrameCount / 2
 
         if let playingEntry = playingEntry {
             playingEntry.lock.lock()
             let framesState = playingEntry.framesState
             playingEntry.lock.unlock()
+
             if state == .waitingForData {
                 var requiredFramesToStart = rendererContext.framesRequiredToStartPlaying
                 if framesState.lastFrameQueued >= 0 {
-                    requiredFramesToStart = min(requiredFramesToStart, UInt32(playingEntry.framesState.lastFrameQueued))
+                    requiredFramesToStart = min(requiredFramesToStart, Double(playingEntry.framesState.lastFrameQueued))
                 }
-                if let readingEntry = readingEntry, readingEntry === playingEntry,
-                   framesState.queued < requiredFramesToStart
+
+                if readingEntry === playingEntry, framesState.queued < Int(requiredFramesToStart)
                 {
                     waitForBuffer = true
                 }
             } else if state == .rebuffering {
                 var requiredFramesToStart = rendererContext.framesRequiredAfterRebuffering
                 if framesState.lastFrameQueued >= 0 {
-                    requiredFramesToStart = min(requiredFramesToStart, UInt32(framesState.lastFrameQueued - framesState.queued))
+                    requiredFramesToStart = min(requiredFramesToStart, Double(framesState.lastFrameQueued - framesState.queued))
                 }
-                if used < requiredFramesToStart {
+                if used < Int(requiredFramesToStart) {
                     waitForBuffer = true
                 }
             } else if state == .waitingForDataAfterSeek {
@@ -102,7 +103,7 @@ final class AudioPlayerRenderProcessor: NSObject {
         rendererContext.lock.unlock()
 
         var totalFramesCopied: UInt32 = 0
-        if used > 0 && !waitForBuffer && state.contains(.running) && state != .paused {
+        if used > 0 && !waitForBuffer && playingEntry != nil && state.contains(.running) && state != .paused {
             if end > start {
                 let framesToCopy = min(inNumberFrames, used)
                 bufferList.mBuffers.mNumberChannels = 2
@@ -162,6 +163,7 @@ final class AudioPlayerRenderProcessor: NSObject {
                 bufferContext.frameUsedCount -= totalFramesCopied
                 rendererContext.lock.unlock()
             }
+
             if playerContext.internalState != .playing {
                 playerContext.setInternalState(to: .playing, when: { state -> Bool in
                     state.contains(.running) && state != .paused
@@ -175,7 +177,7 @@ final class AudioPlayerRenderProcessor: NSObject {
                 memset(mData + Int(totalFramesCopied * frameSizeInBytes), 0, Int(delta * frameSizeInBytes))
             }
 
-            if playingEntry != nil || AudioPlayer.InternalState.waiting.contains(state) {
+            if !(playingEntry == nil || state == .waitingForDataAfterSeek || state == .waitingForData || state == .rebuffering) {
                 if playerContext.internalState != .rebuffering {
                     playerContext.setInternalState(to: .rebuffering, when: { state -> Bool in
                         state.contains(.running) && state != .paused
@@ -184,7 +186,7 @@ final class AudioPlayerRenderProcessor: NSObject {
             } else if state == .waitingForDataAfterSeek {
                 if totalFramesCopied == 0 {
                     rendererContext.waitingForDataAfterSeekFrameCount.write { $0 += Int32(inNumberFrames - totalFramesCopied) }
-                    if rendererContext.waitingForDataAfterSeekFrameCount.value > rendererContext.framesRequiredForDataAfterSeekPlaying {
+                    if rendererContext.waitingForDataAfterSeekFrameCount.value > Int(rendererContext.framesRequiredForDataAfterSeekPlaying) {
                         if playerContext.internalState != .playing {
                             playerContext.setInternalState(to: .playing) { state -> Bool in
                                 state.contains(.running) && state != .playing

AudioStreaming/Streaming/AudioPlayer/UnitDescriptions.swift

@@ -5,10 +5,8 @@
 
 import AVFoundation
 
-private let outputChannels: UInt32 = 2
-
 enum UnitDescriptions {
-    static var output: AudioComponentDescription = {
+    static let output: AudioComponentDescription = {
         var desc = AudioComponentDescription()
         desc.componentType = kAudioUnitType_Output
         #if os(iOS)

AudioStreaming/Streaming/Helpers/AudioFileType.swift

@@ -33,6 +33,7 @@ let fileTypesFromMimeType: [String: AudioFileTypeID] =
         "video/3gpp": kAudioFile3GPType,
         "audio/3gp2": kAudioFile3GP2Type,
         "video/3gp2": kAudioFile3GP2Type,
+        "audio/flac": kAudioFileFLACType
     ]
 
 /// Method that converts mime type to AudioFileTypeID

README.md

@@ -8,7 +8,7 @@ Under the hood `AudioStreaming` uses `AVAudioEngine` and `CoreAudio` for playbac
 #### Supported audio
 - Online streaming (Shoutcast/ICY streams) with metadata parsing
 - AIFF, AIFC, WAVE, CAF, NeXT, ADTS, MPEG Audio Layer 3, AAC audio formats
-- M4A (_Optimized files only_)
+- M4A
 
 As of 1.2.0 version, there's support for non-optimized M4A, please report any issues