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jellyfin/MediaBrowser.Api/Playback/BaseStreamingService.cs

737 lines
26 KiB

using MediaBrowser.Common.Extensions;
using MediaBrowser.Common.IO;
using MediaBrowser.Controller;
using MediaBrowser.Controller.Entities;
using MediaBrowser.Controller.Library;
using MediaBrowser.Model.Drawing;
using MediaBrowser.Model.Dto;
using MediaBrowser.Model.Entities;
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Diagnostics;
using System.IO;
using System.Linq;
using System.Threading;
using System.Threading.Tasks;
namespace MediaBrowser.Api.Playback
{
/// <summary>
/// Class BaseStreamingService
/// </summary>
public abstract class BaseStreamingService : BaseApiService
{
/// <summary>
/// Gets or sets the application paths.
/// </summary>
/// <value>The application paths.</value>
protected IServerApplicationPaths ApplicationPaths { get; set; }
/// <summary>
/// Gets or sets the user manager.
/// </summary>
/// <value>The user manager.</value>
protected IUserManager UserManager { get; set; }
/// <summary>
/// Gets or sets the library manager.
/// </summary>
/// <value>The library manager.</value>
protected ILibraryManager LibraryManager { get; set; }
/// <summary>
/// Gets or sets the iso manager.
/// </summary>
/// <value>The iso manager.</value>
protected IIsoManager IsoManager { get; set; }
/// <summary>
/// Initializes a new instance of the <see cref="BaseStreamingService" /> class.
/// </summary>
/// <param name="appPaths">The app paths.</param>
/// <param name="userManager">The user manager.</param>
/// <param name="libraryManager">The library manager.</param>
/// <param name="isoManager">The iso manager.</param>
protected BaseStreamingService(IServerApplicationPaths appPaths, IUserManager userManager, ILibraryManager libraryManager, IIsoManager isoManager)
{
ApplicationPaths = appPaths;
UserManager = userManager;
LibraryManager = libraryManager;
IsoManager = isoManager;
}
/// <summary>
/// Gets the command line arguments.
/// </summary>
/// <param name="outputPath">The output path.</param>
/// <param name="state">The state.</param>
/// <returns>System.String.</returns>
protected abstract string GetCommandLineArguments(string outputPath, StreamState state);
/// <summary>
/// Gets the type of the transcoding job.
/// </summary>
/// <value>The type of the transcoding job.</value>
protected abstract TranscodingJobType TranscodingJobType { get; }
/// <summary>
/// Gets the output file extension.
/// </summary>
/// <param name="state">The state.</param>
/// <returns>System.String.</returns>
protected virtual string GetOutputFileExtension(StreamState state)
{
return Path.GetExtension(state.Url);
}
/// <summary>
/// Gets the output file path.
/// </summary>
/// <param name="state">The state.</param>
/// <returns>System.String.</returns>
protected string GetOutputFilePath(StreamState state)
{
var folder = ApplicationPaths.EncodedMediaCachePath;
return Path.Combine(folder, GetCommandLineArguments("dummy\\dummy", state).GetMD5() + GetOutputFileExtension(state).ToLower());
}
/// <summary>
/// The fast seek offset seconds
/// </summary>
private const int FastSeekOffsetSeconds = 1;
/// <summary>
/// Gets the fast seek command line parameter.
/// </summary>
/// <param name="request">The request.</param>
/// <returns>System.String.</returns>
/// <value>The fast seek command line parameter.</value>
protected string GetFastSeekCommandLineParameter(StreamRequest request)
{
var time = request.StartTimeTicks;
if (time.HasValue)
{
var seconds = TimeSpan.FromTicks(time.Value).TotalSeconds - FastSeekOffsetSeconds;
if (seconds > 0)
{
return string.Format("-ss {0}", seconds);
}
}
return string.Empty;
}
/// <summary>
/// Gets the slow seek command line parameter.
/// </summary>
/// <param name="request">The request.</param>
/// <returns>System.String.</returns>
/// <value>The slow seek command line parameter.</value>
protected string GetSlowSeekCommandLineParameter(StreamRequest request)
{
var time = request.StartTimeTicks;
if (time.HasValue)
{
if (TimeSpan.FromTicks(time.Value).TotalSeconds - FastSeekOffsetSeconds > 0)
{
return string.Format(" -ss {0}", FastSeekOffsetSeconds);
}
}
return string.Empty;
}
/// <summary>
/// Gets the map args.
/// </summary>
/// <param name="state">The state.</param>
/// <returns>System.String.</returns>
protected virtual string GetMapArgs(StreamState state)
{
var args = string.Empty;
if (state.VideoStream != null)
{
args += string.Format("-map 0:{0}", state.VideoStream.Index);
}
else
{
args += "-map -0:v";
}
if (state.AudioStream != null)
{
args += string.Format(" -map 0:{0}", state.AudioStream.Index);
}
else
{
args += " -map -0:a";
}
if (state.SubtitleStream == null)
{
args += " -map -0:s";
}
return args;
}
/// <summary>
/// Determines which stream will be used for playback
/// </summary>
/// <param name="allStream">All stream.</param>
/// <param name="desiredIndex">Index of the desired.</param>
/// <param name="type">The type.</param>
/// <param name="returnFirstIfNoIndex">if set to <c>true</c> [return first if no index].</param>
/// <returns>MediaStream.</returns>
private MediaStream GetMediaStream(IEnumerable<MediaStream> allStream, int? desiredIndex, MediaStreamType type, bool returnFirstIfNoIndex = true)
{
var streams = allStream.Where(s => s.Type == type).ToList();
if (desiredIndex.HasValue)
{
var stream = streams.FirstOrDefault(s => s.Index == desiredIndex.Value);
if (stream != null)
{
return stream;
}
}
// Just return the first one
return returnFirstIfNoIndex ? streams.FirstOrDefault() : null;
}
/// <summary>
/// If we're going to put a fixed size on the command line, this will calculate it
/// </summary>
/// <param name="state">The state.</param>
/// <param name="outputVideoCodec">The output video codec.</param>
/// <returns>System.String.</returns>
protected string GetOutputSizeParam(StreamState state, string outputVideoCodec)
{
// http://sonnati.wordpress.com/2012/10/19/ffmpeg-the-swiss-army-knife-of-internet-streaming-part-vi/
var assSubtitleParam = string.Empty;
var request = state.VideoRequest;
if (state.SubtitleStream != null)
{
if (state.SubtitleStream.Codec.IndexOf("srt", StringComparison.OrdinalIgnoreCase) != -1 || state.SubtitleStream.Codec.IndexOf("subrip", StringComparison.OrdinalIgnoreCase) != -1)
{
assSubtitleParam = GetTextSubtitleParam((Video)state.Item, state.SubtitleStream, request.StartTimeTicks);
}
}
// If fixed dimensions were supplied
if (request.Width.HasValue && request.Height.HasValue)
{
return string.Format(" -vf \"scale={0}:{1}{2}\"", request.Width.Value, request.Height.Value, assSubtitleParam);
}
var isH264Output = outputVideoCodec.Equals("libx264", StringComparison.OrdinalIgnoreCase);
// If a fixed width was requested
if (request.Width.HasValue)
{
return isH264Output ?
string.Format(" -vf \"scale={0}:trunc(ow/a/2)*2{1}\"", request.Width.Value, assSubtitleParam) :
string.Format(" -vf \"scale={0}:-1{1}\"", request.Width.Value, assSubtitleParam);
}
// If a max width was requested
if (request.MaxWidth.HasValue && !request.MaxHeight.HasValue)
{
return isH264Output ?
string.Format(" -vf \"scale=min(iw\\,{0}):trunc(ow/a/2)*2{1}\"", request.MaxWidth.Value, assSubtitleParam) :
string.Format(" -vf \"scale=min(iw\\,{0}):-1{1}\"", request.MaxWidth.Value, assSubtitleParam);
}
// Need to perform calculations manually
// Try to account for bad media info
var currentHeight = state.VideoStream.Height ?? request.MaxHeight ?? request.Height ?? 0;
var currentWidth = state.VideoStream.Width ?? request.MaxWidth ?? request.Width ?? 0;
var outputSize = DrawingUtils.Resize(currentWidth, currentHeight, request.Width, request.Height, request.MaxWidth, request.MaxHeight);
// If we're encoding with libx264, it can't handle odd numbered widths or heights, so we'll have to fix that
if (isH264Output)
{
return string.Format(" -vf \"scale=trunc({0}/2)*2:trunc({1}/2)*2{2}\"", outputSize.Width, outputSize.Height, assSubtitleParam);
}
// Otherwise use -vf scale since ffmpeg will ensure internally that the aspect ratio is preserved
return string.Format(" -vf \"scale={0}:-1{1}\"", Convert.ToInt32(outputSize.Width), assSubtitleParam);
}
/// <summary>
/// Gets the text subtitle param.
/// </summary>
/// <param name="video">The video.</param>
/// <param name="subtitleStream">The subtitle stream.</param>
/// <param name="startTimeTicks">The start time ticks.</param>
/// <returns>System.String.</returns>
protected string GetTextSubtitleParam(Video video, MediaStream subtitleStream, long? startTimeTicks)
{
var path = subtitleStream.IsExternal ? GetConvertedAssPath(video, subtitleStream) : GetExtractedAssPath(video, subtitleStream);
if (string.IsNullOrEmpty(path))
{
return string.Empty;
}
var param = string.Format(",ass='{0}'", path.Replace('\\', '/').Replace(":/", "\\:/"));
if (startTimeTicks.HasValue)
{
var seconds = Convert.ToInt32(TimeSpan.FromTicks(startTimeTicks.Value).TotalSeconds);
param += string.Format(",setpts=PTS-{0}/TB", seconds);
}
return param;
}
/// <summary>
/// Gets the extracted ass path.
/// </summary>
/// <param name="video">The video.</param>
/// <param name="subtitleStream">The subtitle stream.</param>
/// <returns>System.String.</returns>
private string GetExtractedAssPath(Video video, MediaStream subtitleStream)
{
var path = Kernel.Instance.FFMpegManager.GetSubtitleCachePath(video, subtitleStream.Index, ".ass");
if (!File.Exists(path))
{
var success = Kernel.Instance.FFMpegManager.ExtractTextSubtitle(video, subtitleStream.Index, path, CancellationToken.None).Result;
if (!success)
{
return null;
}
}
return path;
}
/// <summary>
/// Gets the converted ass path.
/// </summary>
/// <param name="video">The video.</param>
/// <param name="subtitleStream">The subtitle stream.</param>
/// <returns>System.String.</returns>
private string GetConvertedAssPath(Video video, MediaStream subtitleStream)
{
var path = Kernel.Instance.FFMpegManager.GetSubtitleCachePath(video, subtitleStream.Index, ".ass");
if (!File.Exists(path))
{
var success = Kernel.Instance.FFMpegManager.ConvertTextSubtitle(subtitleStream, path, CancellationToken.None).Result;
if (!success)
{
return null;
}
}
return path;
}
/// <summary>
/// Gets the internal graphical subtitle param.
/// </summary>
/// <param name="state">The state.</param>
/// <param name="outputVideoCodec">The output video codec.</param>
/// <returns>System.String.</returns>
protected string GetInternalGraphicalSubtitleParam(StreamState state, string outputVideoCodec)
{
var outputSizeParam = string.Empty;
var request = state.VideoRequest;
// Add resolution params, if specified
if (request.Width.HasValue || request.Height.HasValue || request.MaxHeight.HasValue || request.MaxWidth.HasValue)
{
outputSizeParam = GetOutputSizeParam(state, outputVideoCodec).TrimEnd('"');
outputSizeParam = "," + outputSizeParam.Substring(outputSizeParam.IndexOf("scale", StringComparison.OrdinalIgnoreCase));
}
return string.Format(" -filter_complex \"[0:{0}]format=yuva444p,lut=u=128:v=128:y=gammaval(.3)[sub] ; [0:{1}] [sub] overlay{2}\"", state.SubtitleStream.Index, state.VideoStream.Index, outputSizeParam);
}
/// <summary>
/// Gets the number of audio channels to specify on the command line
/// </summary>
/// <param name="request">The request.</param>
/// <param name="audioStream">The audio stream.</param>
/// <returns>System.Nullable{System.Int32}.</returns>
protected int? GetNumAudioChannelsParam(StreamRequest request, MediaStream audioStream)
{
if (audioStream.Channels > 2 && request.AudioCodec.HasValue)
{
if (request.AudioCodec.Value == AudioCodecs.Aac)
{
// libvo_aacenc currently only supports two channel output
return 2;
}
if (request.AudioCodec.Value == AudioCodecs.Wma)
{
// wmav2 currently only supports two channel output
return 2;
}
}
return request.AudioChannels;
}
/// <summary>
/// Determines whether the specified stream is H264.
/// </summary>
/// <param name="stream">The stream.</param>
/// <returns><c>true</c> if the specified stream is H264; otherwise, <c>false</c>.</returns>
protected bool IsH264(MediaStream stream)
{
return stream.Codec.IndexOf("264", StringComparison.OrdinalIgnoreCase) != -1 ||
stream.Codec.IndexOf("avc", StringComparison.OrdinalIgnoreCase) != -1;
}
/// <summary>
/// Gets the name of the output audio codec
/// </summary>
/// <param name="request">The request.</param>
/// <returns>System.String.</returns>
protected string GetAudioCodec(StreamRequest request)
{
var codec = request.AudioCodec;
if (codec.HasValue)
{
if (codec == AudioCodecs.Aac)
{
return "libvo_aacenc";
}
if (codec == AudioCodecs.Mp3)
{
return "libmp3lame";
}
if (codec == AudioCodecs.Vorbis)
{
return "libvorbis";
}
if (codec == AudioCodecs.Wma)
{
return "wmav2";
}
return codec.ToString().ToLower();
}
return "copy";
}
/// <summary>
/// Gets the name of the output video codec
/// </summary>
/// <param name="request">The request.</param>
/// <returns>System.String.</returns>
protected string GetVideoCodec(VideoStreamRequest request)
{
var codec = request.VideoCodec;
if (codec.HasValue)
{
if (codec == VideoCodecs.H264)
{
return "libx264";
}
if (codec == VideoCodecs.Vpx)
{
return "libvpx";
}
if (codec == VideoCodecs.Wmv)
{
return "wmv2";
}
if (codec == VideoCodecs.Theora)
{
return "libtheora";
}
return codec.ToString().ToLower();
}
return "copy";
}
/// <summary>
/// Gets the input argument.
/// </summary>
/// <param name="item">The item.</param>
/// <param name="isoMount">The iso mount.</param>
/// <returns>System.String.</returns>
protected string GetInputArgument(BaseItem item, IIsoMount isoMount)
{
return isoMount == null ?
Kernel.Instance.FFMpegManager.GetInputArgument(item) :
Kernel.Instance.FFMpegManager.GetInputArgument(item as Video, isoMount);
}
/// <summary>
/// Starts the FFMPEG.
/// </summary>
/// <param name="state">The state.</param>
/// <param name="outputPath">The output path.</param>
/// <returns>Task.</returns>
protected async Task StartFFMpeg(StreamState state, string outputPath)
{
var video = state.Item as Video;
if (video != null && video.VideoType == VideoType.Iso && video.IsoType.HasValue && IsoManager.CanMount(video.Path))
{
state.IsoMount = await IsoManager.Mount(video.Path, CancellationToken.None).ConfigureAwait(false);
}
var process = new Process
{
StartInfo = new ProcessStartInfo
{
CreateNoWindow = true,
UseShellExecute = false,
// Must consume both stdout and stderr or deadlocks may occur
RedirectStandardOutput = true,
RedirectStandardError = true,
FileName = Kernel.Instance.FFMpegManager.FFMpegPath,
WorkingDirectory = Path.GetDirectoryName(Kernel.Instance.FFMpegManager.FFMpegPath),
Arguments = GetCommandLineArguments(outputPath, state),
WindowStyle = ProcessWindowStyle.Hidden,
ErrorDialog = false
},
EnableRaisingEvents = true
};
ApiEntryPoint.Instance.OnTranscodeBeginning(outputPath, TranscodingJobType, process);
Logger.Info(process.StartInfo.FileName + " " + process.StartInfo.Arguments);
var logFilePath = Path.Combine(ApplicationPaths.LogDirectoryPath, "ffmpeg-" + Guid.NewGuid() + ".txt");
// FFMpeg writes debug/error info to stderr. This is useful when debugging so let's put it in the log directory.
state.LogFileStream = new FileStream(logFilePath, FileMode.Create, FileAccess.Write, FileShare.Read, StreamDefaults.DefaultFileStreamBufferSize, FileOptions.Asynchronous);
process.Exited += (sender, args) => OnFFMpegProcessExited(process, state);
try
{
process.Start();
}
catch (Win32Exception ex)
{
Logger.ErrorException("Error starting ffmpeg", ex);
ApiEntryPoint.Instance.OnTranscodeFailedToStart(outputPath, TranscodingJobType);
state.LogFileStream.Dispose();
throw;
}
// MUST read both stdout and stderr asynchronously or a deadlock may occurr
process.BeginOutputReadLine();
// Important - don't await the log task or we won't be able to kill ffmpeg when the user stops playback
process.StandardError.BaseStream.CopyToAsync(state.LogFileStream);
// Wait for the file to exist before proceeeding
while (!File.Exists(outputPath))
{
await Task.Delay(100).ConfigureAwait(false);
}
}
/// <summary>
/// Processes the exited.
/// </summary>
/// <param name="process">The process.</param>
/// <param name="state">The state.</param>
protected void OnFFMpegProcessExited(Process process, StreamState state)
{
if (state.IsoMount != null)
{
state.IsoMount.Dispose();
state.IsoMount = null;
}
var outputFilePath = GetOutputFilePath(state);
state.LogFileStream.Dispose();
int? exitCode = null;
try
{
exitCode = process.ExitCode;
Logger.Info("FFMpeg exited with code {0} for {1}", exitCode.Value, outputFilePath);
}
catch
{
Logger.Info("FFMpeg exited with an error for {0}", outputFilePath);
}
process.Dispose();
ApiEntryPoint.Instance.OnTranscodingFinished(outputFilePath, TranscodingJobType);
if (!exitCode.HasValue || exitCode.Value != 0)
{
Logger.Info("Deleting partial stream file(s) {0}", outputFilePath);
try
{
DeletePartialStreamFiles(outputFilePath);
}
catch (IOException ex)
{
Logger.ErrorException("Error deleting partial stream file(s) {0}", ex, outputFilePath);
}
}
else
{
Logger.Info("FFMpeg completed and exited normally for {0}", outputFilePath);
}
}
/// <summary>
/// Deletes the partial stream files.
/// </summary>
/// <param name="outputFilePath">The output file path.</param>
protected abstract void DeletePartialStreamFiles(string outputFilePath);
/// <summary>
/// Gets the state.
/// </summary>
/// <param name="request">The request.</param>
/// <returns>StreamState.</returns>
protected StreamState GetState(StreamRequest request)
{
var item = DtoBuilder.GetItemByClientId(request.Id, UserManager, LibraryManager);
var media = (IHasMediaStreams)item;
var url = RequestContext.PathInfo;
if (!request.AudioCodec.HasValue)
{
request.AudioCodec = InferAudioCodec(url);
}
var state = new StreamState
{
Item = item,
Request = request,
Url = url
};
var videoRequest = request as VideoStreamRequest;
if (videoRequest != null)
{
if (!videoRequest.VideoCodec.HasValue)
{
videoRequest.VideoCodec = InferVideoCodec(url);
}
state.VideoStream = GetMediaStream(media.MediaStreams, videoRequest.VideoStreamIndex, MediaStreamType.Video, true);
state.SubtitleStream = GetMediaStream(media.MediaStreams, videoRequest.SubtitleStreamIndex, MediaStreamType.Subtitle, false);
}
state.AudioStream = GetMediaStream(media.MediaStreams, null, MediaStreamType.Audio, true);
return state;
}
/// <summary>
/// Infers the audio codec based on the url
/// </summary>
/// <param name="url">The URL.</param>
/// <returns>System.Nullable{AudioCodecs}.</returns>
private AudioCodecs? InferAudioCodec(string url)
{
var ext = Path.GetExtension(url);
if (string.Equals(ext, ".mp3", StringComparison.OrdinalIgnoreCase))
{
return AudioCodecs.Mp3;
}
if (string.Equals(ext, ".aac", StringComparison.OrdinalIgnoreCase))
{
return AudioCodecs.Aac;
}
if (string.Equals(ext, ".wma", StringComparison.OrdinalIgnoreCase))
{
return AudioCodecs.Wma;
}
if (string.Equals(ext, ".ogg", StringComparison.OrdinalIgnoreCase))
{
return AudioCodecs.Vorbis;
}
if (string.Equals(ext, ".oga", StringComparison.OrdinalIgnoreCase))
{
return AudioCodecs.Vorbis;
}
if (string.Equals(ext, ".ogv", StringComparison.OrdinalIgnoreCase))
{
return AudioCodecs.Vorbis;
}
if (string.Equals(ext, ".webm", StringComparison.OrdinalIgnoreCase))
{
return AudioCodecs.Vorbis;
}
if (string.Equals(ext, ".webma", StringComparison.OrdinalIgnoreCase))
{
return AudioCodecs.Vorbis;
}
return null;
}
/// <summary>
/// Infers the video codec.
/// </summary>
/// <param name="url">The URL.</param>
/// <returns>System.Nullable{VideoCodecs}.</returns>
private VideoCodecs? InferVideoCodec(string url)
{
var ext = Path.GetExtension(url);
if (string.Equals(ext, ".asf", StringComparison.OrdinalIgnoreCase))
{
return VideoCodecs.Wmv;
}
if (string.Equals(ext, ".webm", StringComparison.OrdinalIgnoreCase))
{
return VideoCodecs.Vpx;
}
if (string.Equals(ext, ".ogg", StringComparison.OrdinalIgnoreCase) || string.Equals(ext, ".ogv", StringComparison.OrdinalIgnoreCase))
{
return VideoCodecs.Theora;
}
if (string.Equals(ext, ".m3u8", StringComparison.OrdinalIgnoreCase) || string.Equals(ext, ".ts", StringComparison.OrdinalIgnoreCase))
{
return VideoCodecs.H264;
}
return null;
}
}
}