some progress towards brining back hls, but not finished yet

MediaBrowser.Api/Playback/BaseStreamingService.cs

@@ -647,10 +647,13 @@ namespace MediaBrowser.Api.Playback
                     videoRequest.VideoCodec = InferVideoCodec(url);
                 }
 
-                state.AudioStream = GetMediaStream(media.MediaStreams, videoRequest.AudioStreamIndex, MediaStreamType.Audio, true);
                 state.VideoStream = GetMediaStream(media.MediaStreams, videoRequest.VideoStreamIndex, MediaStreamType.Video, true);
                 state.SubtitleStream = GetMediaStream(media.MediaStreams, videoRequest.SubtitleStreamIndex, MediaStreamType.Subtitle, false);
             }
+            else
+            {
+                state.AudioStream = GetMediaStream(media.MediaStreams, null, MediaStreamType.Audio, true);
+            }
             
             return state;
         }

MediaBrowser.Api/Playback/Hls/AudioHlsService.cs

@@ -2,10 +2,32 @@
 using MediaBrowser.Controller;
 using MediaBrowser.Controller.Library;
 using MediaBrowser.Model.Dto;
+using ServiceStack.ServiceHost;
 using System;
+using System.IO;
 
 namespace MediaBrowser.Api.Playback.Hls
 {
+    /// <summary>
+    /// Class GetHlsAudioStream
+    /// </summary>
+    [Route("/Audio/{Id}/stream.m3u8", "GET")]
+    [ServiceStack.ServiceHost.Api(Description = "Gets an audio stream using HTTP live streaming.")]
+    public class GetHlsAudioStream : StreamRequest
+    {
+
+    }
+
+    [Route("/Audio/{Id}/segments/{SegmentId}.mp3", "GET")]
+    [Route("/Audio/{Id}/segments/{SegmentId}.aac", "GET")]
+    [ServiceStack.ServiceHost.Api(Description = "Gets an Http live streaming segment file. Internal use only.")]
+    public class GetHlsAudioSegment
+    {
+        public string Id { get; set; }
+
+        public string SegmentId { get; set; }
+    }
+
     /// <summary>
     /// Class AudioHlsService
     /// </summary>
@@ -16,6 +38,25 @@ namespace MediaBrowser.Api.Playback.Hls
         {
         }
 
+        public object Get(GetHlsAudioSegment request)
+        {
+            var file = SegmentFilePrefix + request.SegmentId + Path.GetExtension(Request.PathInfo);
+
+            file = Path.Combine(ApplicationPaths.EncodedMediaCachePath, file);
+
+            return ToStaticFileResult(file);
+        }
+
+        /// <summary>
+        /// Gets the specified request.
+        /// </summary>
+        /// <param name="request">The request.</param>
+        /// <returns>System.Object.</returns>
+        public object Get(GetHlsAudioStream request)
+        {
+            return ProcessRequest(request);
+        }
+
         /// <summary>
         /// Gets the audio arguments.
         /// </summary>
@@ -75,7 +116,7 @@ namespace MediaBrowser.Api.Playback.Hls
                 return ".mp3";
             }
 
-            throw new InvalidOperationException("Only aac and mp3 audio codecs are supported.");
+            throw new ArgumentException("Must specify either aac or mp3 audio codec.");
         }
 
         /// <summary>

MediaBrowser.Api/Playback/Hls/BaseHlsService.cs

@@ -52,10 +52,11 @@ namespace MediaBrowser.Api.Playback.Hls
         /// <summary>
         /// Processes the request.
         /// </summary>
-        /// <param name="state">The state.</param>
         /// <returns>System.Object.</returns>
-        protected object ProcessRequest(StreamState state)
+        protected object ProcessRequest(StreamRequest request)
         {
+            var state = GetState(request);
+            
             return ProcessRequestAsync(state).Result;
         }
 
@@ -85,12 +86,10 @@ namespace MediaBrowser.Api.Playback.Hls
 
             var content = Encoding.UTF8.GetBytes(playlistText);
 
-            var stream = new MemoryStream(content);
-
             try
             {
                 Response.ContentType = MimeTypes.GetMimeType("playlist.m3u8");
-                return new StreamWriter(stream);
+                return content;
             }
             finally
             {
@@ -130,6 +129,8 @@ namespace MediaBrowser.Api.Playback.Hls
             // The segement paths within the playlist are phsyical, so strip that out to make it relative
             fileText = fileText.Replace(Path.GetDirectoryName(playlist) + Path.DirectorySeparatorChar, string.Empty);
 
+            fileText = fileText.Replace(SegmentFilePrefix, "segments/");
+
             // Even though we specify target duration of 9, ffmpeg seems unable to keep all segments under that amount
             fileText = fileText.Replace("#EXT-X-TARGETDURATION:9", "#EXT-X-TARGETDURATION:10");