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added dual layer hls playlist

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This commit is contained in:
Luke Pulverenti 2013-08-28 18:05:00 -04:00
parent 528100ab31
commit 3c98f62389
3 changed files with 101 additions and 48 deletions
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2
MediaBrowser.Api/Playback/Hls/AudioHlsService.cs
View File

@ -65,7 +65,7 @@ namespace MediaBrowser.Api.Playback.Hls
/// <returns>System.Object.</returns>
public object Get(GetHlsAudioSegment request)
{
var file = SegmentFilePrefix + request.SegmentId + Path.GetExtension(RequestContext.PathInfo);
var file = request.SegmentId + Path.GetExtension(RequestContext.PathInfo);
file = Path.Combine(ApplicationPaths.EncodedMediaCachePath, file);

96
MediaBrowser.Api/Playback/Hls/BaseHlsService.cs
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@ -3,12 +3,15 @@ using MediaBrowser.Common.IO;
using MediaBrowser.Common.MediaInfo;
using MediaBrowser.Common.Net;
using MediaBrowser.Controller;
using MediaBrowser.Controller.Entities;
using MediaBrowser.Controller.Library;
using MediaBrowser.Model.IO;
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using MediaBrowser.Model.IO;
namespace MediaBrowser.Api.Playback.Hls
{
@ -17,18 +20,13 @@ namespace MediaBrowser.Api.Playback.Hls
/// </summary>
public abstract class BaseHlsService : BaseStreamingService
{
/// <summary>
/// The segment file prefix
/// </summary>
public const string SegmentFilePrefix = "hls-";
protected override string GetOutputFilePath(StreamState state)
{
var folder = ApplicationPaths.EncodedMediaCachePath;
var outputFileExtension = GetOutputFileExtension(state);
return Path.Combine(folder, SegmentFilePrefix + GetCommandLineArguments("dummy\\dummy", state, false).GetMD5() + (outputFileExtension ?? string.Empty).ToLower());
return Path.Combine(folder, GetCommandLineArguments("dummy\\dummy", state, false).GetMD5() + (outputFileExtension ?? string.Empty).ToLower());
}
/// <summary>
@ -107,8 +105,12 @@ namespace MediaBrowser.Api.Playback.Hls
ApiEntryPoint.Instance.OnTranscodeBeginRequest(playlist, TranscodingJobType.Hls);
}
// Get the current playlist text and convert to bytes
var playlistText = await GetPlaylistFileText(playlist, isPlaylistNewlyCreated).ConfigureAwait(false);
if (isPlaylistNewlyCreated)
{
await WaitForMinimumSegmentCount(playlist, 3).ConfigureAwait(false);
}
var playlistText = GetMasterPlaylistFileText(playlist, state.VideoRequest.VideoBitRate.Value);
try
{
@ -120,18 +122,31 @@ namespace MediaBrowser.Api.Playback.Hls
}
}
/// <summary>
/// Gets the current playlist text
/// </summary>
/// <param name="playlist">The path to the playlist</param>
/// <param name="waitForMinimumSegments">Whether or not we should wait until it contains three segments</param>
/// <returns>Task{System.String}.</returns>
private async Task<string> GetPlaylistFileText(string playlist, bool waitForMinimumSegments)
private string GetMasterPlaylistFileText(string firstPlaylist, int bitrate)
{
string fileText;
var builder = new StringBuilder();
builder.AppendLine("#EXTM3U");
// Main stream
builder.AppendLine("#EXT-X-STREAM-INF:PROGRAM-ID=1, BANDWIDTH=" + bitrate.ToString(UsCulture));
var playlistUrl = "hls/" + Path.GetFileName(firstPlaylist).Replace(".m3u8", "/stream.m3u8");
builder.AppendLine(playlistUrl);
// Low bitrate stream
//builder.AppendLine("#EXT-X-STREAM-INF:PROGRAM-ID=1, BANDWIDTH=64000");
//playlistUrl = "hls/" + Path.GetFileName(firstPlaylist).Replace(".m3u8", "-low/stream.m3u8");
//builder.AppendLine(playlistUrl);
return builder.ToString();
}
private async Task WaitForMinimumSegmentCount(string playlist, int segmentCount)
{
while (true)
{
string fileText;
// Need to use FileShare.ReadWrite because we're reading the file at the same time it's being written
using (var fileStream = new FileStream(playlist, FileMode.Open, FileAccess.Read, FileShare.ReadWrite, StreamDefaults.DefaultFileStreamBufferSize, FileOptions.Asynchronous))
{
@ -141,17 +156,13 @@ namespace MediaBrowser.Api.Playback.Hls
}
}
if (!waitForMinimumSegments || CountStringOccurrences(fileText, "#EXTINF:") >= 3)
if (CountStringOccurrences(fileText, "#EXTINF:") >= segmentCount)
{
break;
}
await Task.Delay(25).ConfigureAwait(false);
}
fileText = fileText.Replace(SegmentFilePrefix, "hls/").Replace(".ts", "/stream.ts").Replace(".aac", "/stream.aac").Replace(".mp3", "/stream.mp3");
return fileText;
}
/// <summary>
@ -173,6 +184,27 @@ namespace MediaBrowser.Api.Playback.Hls
return count;
}
protected void ExtendHlsTimer(string itemId, string playlistId)
{
foreach (var playlist in Directory.EnumerateFiles(ApplicationPaths.EncodedMediaCachePath, "*.m3u8")
.Where(i => i.IndexOf(playlistId, StringComparison.OrdinalIgnoreCase) != -1)
.ToList())
{
ApiEntryPoint.Instance.OnTranscodeBeginRequest(playlist, TranscodingJobType.Hls);
// Avoid implicitly captured closure
var playlist1 = playlist;
Task.Run(async () =>
{
// This is an arbitrary time period corresponding to when the request completes.
await Task.Delay(30000).ConfigureAwait(false);
ApiEntryPoint.Instance.OnTranscodeEndRequest(playlist1, TranscodingJobType.Hls);
});
}
}
/// <summary>
/// Gets the command line arguments.
/// </summary>
@ -184,10 +216,7 @@ namespace MediaBrowser.Api.Playback.Hls
{
var probeSize = GetProbeSizeArgument(state.Item);
var audioOnlyPlaylistParams = string.Format(" -threads 0 -vn -codec:a:0 aac -strict experimental -ac 2 -ab 64000 -hls_time 10 -start_number 0 -hls_list_size 1440 \"{0}\"",
"");
return string.Format("{0} {1} {2} -i {3}{4} -threads 0 {5} {6} {7} -hls_time 10 -start_number 0 -hls_list_size 1440 \"{8}\" {9}",
var args = string.Format("{0} {1} {2} -i {3}{4} -threads 0 {5} {6} {7} -hls_time 10 -start_number 0 -hls_list_size 1440 \"{8}\"",
probeSize,
GetUserAgentParam(state.Item),
GetFastSeekCommandLineParameter(state.Request),
@ -196,9 +225,20 @@ namespace MediaBrowser.Api.Playback.Hls
GetMapArgs(state),
GetVideoArguments(state, performSubtitleConversions),
GetAudioArguments(state),
outputPath,
audioOnlyPlaylistParams
outputPath
).Trim();
if (state.Item is Video)
{
var lowBitratePath = Path.Combine(Path.GetDirectoryName(outputPath), Path.GetFileNameWithoutExtension(outputPath) + "-low.m3u8");
var lowBitrateParams = string.Format(" -threads 0 -vn -codec:a:0 aac -strict experimental -ac 2 -ab 64000 -hls_time 10 -start_number 0 -hls_list_size 1440 \"{0}\"",
lowBitratePath);
args += " " + lowBitrateParams;
}
return args;
}
}
}

51
MediaBrowser.Api/Playback/Hls/VideoHlsService.cs
View File

@ -5,8 +5,6 @@ using MediaBrowser.Model.IO;
using ServiceStack.ServiceHost;
using System;
using System.IO;
using System.Linq;
using System.Threading.Tasks;
namespace MediaBrowser.Api.Playback.Hls
{
@ -23,7 +21,7 @@ namespace MediaBrowser.Api.Playback.Hls
/// <summary>
/// Class GetHlsVideoSegment
/// </summary>
[Route("/Videos/{Id}/hls/{SegmentId}/stream.ts", "GET")]
[Route("/Videos/{Id}/hls/{PlaylistId}/{SegmentId}.ts", "GET")]
[Api(Description = "Gets an Http live streaming segment file. Internal use only.")]
public class GetHlsVideoSegment
{
@ -33,6 +31,8 @@ namespace MediaBrowser.Api.Playback.Hls
/// <value>The id.</value>
public string Id { get; set; }
public string PlaylistId { get; set; }
/// <summary>
/// Gets or sets the segment id.
/// </summary>
@ -40,6 +40,22 @@ namespace MediaBrowser.Api.Playback.Hls
public string SegmentId { get; set; }
}
/// <summary>
/// Class GetHlsVideoSegment
/// </summary>
[Route("/Videos/{Id}/hls/{PlaylistId}/stream.m3u8", "GET")]
[Api(Description = "Gets an Http live streaming segment file. Internal use only.")]
public class GetHlsPlaylist
{
/// <summary>
/// Gets or sets the id.
/// </summary>
/// <value>The id.</value>
public string Id { get; set; }
public string PlaylistId { get; set; }
}
/// <summary>
/// Class VideoHlsService
/// </summary>
@ -65,23 +81,20 @@ namespace MediaBrowser.Api.Playback.Hls
/// <returns>System.Object.</returns>
public object Get(GetHlsVideoSegment request)
{
foreach (var playlist in Directory.EnumerateFiles(ApplicationPaths.EncodedMediaCachePath, "*.m3u8").ToList())
{
ApiEntryPoint.Instance.OnTranscodeBeginRequest(playlist, TranscodingJobType.Hls);
// Avoid implicitly captured closure
var playlist1 = playlist;
Task.Run(async () =>
{
// This is an arbitrary time period corresponding to when the request completes.
await Task.Delay(30000).ConfigureAwait(false);
ApiEntryPoint.Instance.OnTranscodeEndRequest(playlist1, TranscodingJobType.Hls);
});
}
ExtendHlsTimer(request.Id, request.PlaylistId);
var file = SegmentFilePrefix + request.SegmentId + Path.GetExtension(RequestContext.PathInfo);
var file = request.SegmentId + Path.GetExtension(RequestContext.PathInfo);
file = Path.Combine(ApplicationPaths.EncodedMediaCachePath, file);
return ResultFactory.GetStaticFileResult(RequestContext, file);
}
public object Get(GetHlsPlaylist request)
{
ExtendHlsTimer(request.Id, request.PlaylistId);
var file = request.PlaylistId + Path.GetExtension(RequestContext.PathInfo);
file = Path.Combine(ApplicationPaths.EncodedMediaCachePath, file);