Release 2.5.2

* Handle case when header for stream does not contain expected content

* update documentation

* fix elapsed time updating on seek in example app

Example/SwiftAudioPlayer/ViewController.swift

@@ -117,7 +117,6 @@ class ViewController: UIViewController {
         
         _ = SAPlayer.Updates.ElapsedTime.subscribe { [weak self] (url, position) in
             guard let self = self else { return }
-            guard self.beingSeeked == false else { return }
             guard url == self.selectedAudio.url || url == self.savedUrls[self.selectedAudio] else { return }
             
             self.currentTimestampLabel.text = SAPlayer.prettifyTimestamp(position)

Source/Engine/AudioThrottler.swift

@@ -97,7 +97,15 @@ class AudioThrottler: AudioThrottleable {
     private var networkData: [NetworkDataWrapper] = []
     var shouldThrottle = false
     var byteOffsetBecauseOfSeek: UInt = 0
-    var totalBytesExpected: Int64? //this got sent up twice. Once at beginning of stream and second from network seek. We honor the first send
+    
+    //This will be sent once at beginning of stream and every network seek
+    var totalBytesExpected: Int64? {
+        didSet {
+            if let bytes = totalBytesExpected {
+                delegate?.didUpdate(totalBytesExpected: Int64(byteOffsetBecauseOfSeek) + bytes)
+            }
+        }
+    }
     
     var largestPollingOffsetDifference: UInt64 = 1
     
@@ -110,9 +118,8 @@ class AudioThrottler: AudioThrottleable {
             Log.debug("received stream data of size \(pto.getData().count) and progress: \(pto.getProgress())")
             self.delegate?.didUpdate(networkStreamProgress: pto.getProgress())
             
-            if self.totalBytesExpected == nil, let totalBytesExpected = pto.getTotalBytesExpected() {
+            if let totalBytesExpected = pto.getTotalBytesExpected() {
                 self.totalBytesExpected = totalBytesExpected
-                self.delegate?.didUpdate(totalBytesExpected: totalBytesExpected)
             }
             
             let lastItem = self.networkData.last

Source/Engine/Parser/AudioParser.swift

@@ -85,7 +85,9 @@ class AudioParser: AudioParsable {
             return max(AVAudioPacketCount(parsedAudioHeaderPacketCount), AVAudioPacketCount(audioPackets.count))
         }
         
-        guard let sizeOfFileInBytes = expectedFileSizeInBytes, let bytesPerPacket = averageBytesPerPacket else {
+        let sizeOfFileInBytes: UInt64 = expectedFileSizeInBytes != nil ? expectedFileSizeInBytes! : 0
+        
+        guard let bytesPerPacket = averageBytesPerPacket else {
             return AVAudioPacketCount(0)
         }
         

Source/Model/Streaming/AudioStreamWorker.swift

@@ -247,11 +247,15 @@ extension AudioStreamWorker: URLSessionDataDelegate {
             return
         }
         
-        guard let totalBytesExpected = totalBytesExpectedForCurrentStream, totalBytesExpected > 0 else {
+        guard var totalBytesExpected = totalBytesExpectedForCurrentStream else {
             Log.monitor("should not be called 223r2")
             return
         }
         
+        if totalBytesExpected <= 0 {
+            totalBytesExpected = totalBytesReceived
+        }
+        
         totalBytesReceived = totalBytesReceived + Int64(data.count)
         let progress = Double(totalBytesReceived)/Double(totalBytesExpected)
         

Source/SAPlayer.swift

@@ -104,6 +104,8 @@ public class SAPlayer {
     
     /**
      Total duration of current audio initialized. Returns nil if no audio is initialized in player.
+     
+     - 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, this value will be constantly updating to best known value at the time.
      */
     public var duration: Double? {
         get {

Source/SAPlayerUpdateSubscription.swift

@@ -66,12 +66,16 @@ extension SAPlayer {
         
         /**
          Updates to changes in the duration of the current initialized audio. Especially helpful for audio that is being streamed and can change with more data.
+         
+         - 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).
          */
         public struct Duration {
             
             /**
              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.
@@ -136,6 +140,8 @@ 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.

SwiftAudioPlayer.podspec

@@ -8,7 +8,7 @@
 
 Pod::Spec.new do |s|
   s.name             = 'SwiftAudioPlayer'
-  s.version          = '2.4.0'
+  s.version          = '2.5.2'
   s.summary          = 'SwiftAudioPlayer is a Swift based audio player that can handle streaming from a remote location and audio manipulation.'
 
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