jellyfin/MediaBrowser.Api/Playback/Progressive/BaseProgressiveStreamingService.cs
2016-11-10 09:41:24 -05:00

429 lines
16 KiB
C#

using MediaBrowser.Common.Net;
using MediaBrowser.Controller.Configuration;
using MediaBrowser.Controller.Devices;
using MediaBrowser.Controller.Dlna;
using MediaBrowser.Controller.Drawing;
using MediaBrowser.Controller.Library;
using MediaBrowser.Controller.MediaEncoding;
using MediaBrowser.Controller.Net;
using MediaBrowser.Model.IO;
using MediaBrowser.Model.MediaInfo;
using MediaBrowser.Model.Serialization;
using System;
using System.Collections.Generic;
using System.Globalization;
using System.IO;
using System.Threading;
using System.Threading.Tasks;
using MediaBrowser.Common.IO;
using MediaBrowser.Controller.IO;
using MediaBrowser.Model.IO;
using MediaBrowser.Model.Services;
namespace MediaBrowser.Api.Playback.Progressive
{
/// <summary>
/// Class BaseProgressiveStreamingService
/// </summary>
public abstract class BaseProgressiveStreamingService : BaseStreamingService
{
protected readonly IImageProcessor ImageProcessor;
public BaseProgressiveStreamingService(IServerConfigurationManager serverConfig, IUserManager userManager, ILibraryManager libraryManager, IIsoManager isoManager, IMediaEncoder mediaEncoder, IFileSystem fileSystem, IDlnaManager dlnaManager, ISubtitleEncoder subtitleEncoder, IDeviceManager deviceManager, IMediaSourceManager mediaSourceManager, IZipClient zipClient, IJsonSerializer jsonSerializer, IAuthorizationContext authorizationContext, IImageProcessor imageProcessor) : base(serverConfig, userManager, libraryManager, isoManager, mediaEncoder, fileSystem, dlnaManager, subtitleEncoder, deviceManager, mediaSourceManager, zipClient, jsonSerializer, authorizationContext)
{
ImageProcessor = imageProcessor;
}
/// <summary>
/// Gets the output file extension.
/// </summary>
/// <param name="state">The state.</param>
/// <returns>System.String.</returns>
protected override string GetOutputFileExtension(StreamState state)
{
var ext = base.GetOutputFileExtension(state);
if (!string.IsNullOrEmpty(ext))
{
return ext;
}
var isVideoRequest = state.VideoRequest != null;
// Try to infer based on the desired video codec
if (isVideoRequest)
{
var videoCodec = state.VideoRequest.VideoCodec;
if (string.Equals(videoCodec, "h264", StringComparison.OrdinalIgnoreCase))
{
return ".ts";
}
if (string.Equals(videoCodec, "theora", StringComparison.OrdinalIgnoreCase))
{
return ".ogv";
}
if (string.Equals(videoCodec, "vpx", StringComparison.OrdinalIgnoreCase))
{
return ".webm";
}
if (string.Equals(videoCodec, "wmv", StringComparison.OrdinalIgnoreCase))
{
return ".asf";
}
}
// Try to infer based on the desired audio codec
if (!isVideoRequest)
{
var audioCodec = state.Request.AudioCodec;
if (string.Equals("aac", audioCodec, StringComparison.OrdinalIgnoreCase))
{
return ".aac";
}
if (string.Equals("mp3", audioCodec, StringComparison.OrdinalIgnoreCase))
{
return ".mp3";
}
if (string.Equals("vorbis", audioCodec, StringComparison.OrdinalIgnoreCase))
{
return ".ogg";
}
if (string.Equals("wma", audioCodec, StringComparison.OrdinalIgnoreCase))
{
return ".wma";
}
}
return null;
}
/// <summary>
/// Gets the type of the transcoding job.
/// </summary>
/// <value>The type of the transcoding job.</value>
protected override TranscodingJobType TranscodingJobType
{
get { return TranscodingJobType.Progressive; }
}
/// <summary>
/// Processes the request.
/// </summary>
/// <param name="request">The request.</param>
/// <param name="isHeadRequest">if set to <c>true</c> [is head request].</param>
/// <returns>Task.</returns>
protected async Task<object> ProcessRequest(StreamRequest request, bool isHeadRequest)
{
var cancellationTokenSource = new CancellationTokenSource();
var state = await GetState(request, cancellationTokenSource.Token).ConfigureAwait(false);
var responseHeaders = new Dictionary<string, string>();
if (request.Static && state.DirectStreamProvider != null)
{
AddDlnaHeaders(state, responseHeaders, true);
using (state)
{
var outputHeaders = new Dictionary<string, string>(StringComparer.OrdinalIgnoreCase);
// TODO: Don't hardcode this
outputHeaders["Content-Type"] = MediaBrowser.Model.Net.MimeTypes.GetMimeType("file.ts");
return new ProgressiveFileCopier(state.DirectStreamProvider, outputHeaders, null, Logger, CancellationToken.None)
{
AllowEndOfFile = false
};
}
}
// Static remote stream
if (request.Static && state.InputProtocol == MediaProtocol.Http)
{
AddDlnaHeaders(state, responseHeaders, true);
using (state)
{
return await GetStaticRemoteStreamResult(state, responseHeaders, isHeadRequest, cancellationTokenSource).ConfigureAwait(false);
}
}
if (request.Static && state.InputProtocol != MediaProtocol.File)
{
throw new ArgumentException(string.Format("Input protocol {0} cannot be streamed statically.", state.InputProtocol));
}
var outputPath = state.OutputFilePath;
var outputPathExists = FileSystem.FileExists(outputPath);
var transcodingJob = ApiEntryPoint.Instance.GetTranscodingJob(outputPath, TranscodingJobType.Progressive);
var isTranscodeCached = outputPathExists && transcodingJob != null;
AddDlnaHeaders(state, responseHeaders, request.Static || isTranscodeCached);
// Static stream
if (request.Static)
{
var contentType = state.GetMimeType(state.MediaPath);
using (state)
{
if (state.MediaSource.IsInfiniteStream)
{
var outputHeaders = new Dictionary<string, string>(StringComparer.OrdinalIgnoreCase);
outputHeaders["Content-Type"] = contentType;
return new ProgressiveFileCopier(FileSystem, state.MediaPath, outputHeaders, null, Logger, CancellationToken.None)
{
AllowEndOfFile = false
};
}
TimeSpan? cacheDuration = null;
if (!string.IsNullOrEmpty(request.Tag))
{
cacheDuration = TimeSpan.FromDays(365);
}
return await ResultFactory.GetStaticFileResult(Request, new StaticFileResultOptions
{
ResponseHeaders = responseHeaders,
ContentType = contentType,
IsHeadRequest = isHeadRequest,
Path = state.MediaPath,
CacheDuration = cacheDuration
}).ConfigureAwait(false);
}
}
//// Not static but transcode cache file exists
//if (isTranscodeCached && state.VideoRequest == null)
//{
// var contentType = state.GetMimeType(outputPath);
// try
// {
// if (transcodingJob != null)
// {
// ApiEntryPoint.Instance.OnTranscodeBeginRequest(transcodingJob);
// }
// return await ResultFactory.GetStaticFileResult(Request, new StaticFileResultOptions
// {
// ResponseHeaders = responseHeaders,
// ContentType = contentType,
// IsHeadRequest = isHeadRequest,
// Path = outputPath,
// FileShare = FileShareMode.ReadWrite,
// OnComplete = () =>
// {
// if (transcodingJob != null)
// {
// ApiEntryPoint.Instance.OnTranscodeEndRequest(transcodingJob);
// }
// }
// }).ConfigureAwait(false);
// }
// finally
// {
// state.Dispose();
// }
//}
// Need to start ffmpeg
try
{
return await GetStreamResult(state, responseHeaders, isHeadRequest, cancellationTokenSource).ConfigureAwait(false);
}
catch
{
state.Dispose();
throw;
}
}
/// <summary>
/// Gets the static remote stream result.
/// </summary>
/// <param name="state">The state.</param>
/// <param name="responseHeaders">The response headers.</param>
/// <param name="isHeadRequest">if set to <c>true</c> [is head request].</param>
/// <param name="cancellationTokenSource">The cancellation token source.</param>
/// <returns>Task{System.Object}.</returns>
private async Task<object> GetStaticRemoteStreamResult(StreamState state, Dictionary<string, string> responseHeaders, bool isHeadRequest, CancellationTokenSource cancellationTokenSource)
{
string useragent = null;
state.RemoteHttpHeaders.TryGetValue("User-Agent", out useragent);
var trySupportSeek = false;
var options = new HttpRequestOptions
{
Url = state.MediaPath,
UserAgent = useragent,
BufferContent = false,
CancellationToken = cancellationTokenSource.Token
};
if (trySupportSeek)
{
if (!string.IsNullOrWhiteSpace(Request.QueryString["Range"]))
{
options.RequestHeaders["Range"] = Request.QueryString["Range"];
}
}
var response = await HttpClient.GetResponse(options).ConfigureAwait(false);
if (trySupportSeek)
{
foreach (var name in new[] { "Content-Range", "Accept-Ranges" })
{
var val = response.Headers[name];
if (!string.IsNullOrWhiteSpace(val))
{
responseHeaders[name] = val;
}
}
}
else
{
responseHeaders["Accept-Ranges"] = "none";
}
if (response.ContentLength.HasValue)
{
responseHeaders["Content-Length"] = response.ContentLength.Value.ToString(UsCulture);
}
if (isHeadRequest)
{
using (response)
{
return ResultFactory.GetResult(new byte[] { }, response.ContentType, responseHeaders);
}
}
var result = new StaticRemoteStreamWriter(response);
result.Headers["Content-Type"] = response.ContentType;
// Add the response headers to the result object
foreach (var header in responseHeaders)
{
result.Headers[header.Key] = header.Value;
}
return result;
}
/// <summary>
/// Gets the stream result.
/// </summary>
/// <param name="state">The state.</param>
/// <param name="responseHeaders">The response headers.</param>
/// <param name="isHeadRequest">if set to <c>true</c> [is head request].</param>
/// <param name="cancellationTokenSource">The cancellation token source.</param>
/// <returns>Task{System.Object}.</returns>
private async Task<object> GetStreamResult(StreamState state, IDictionary<string, string> responseHeaders, bool isHeadRequest, CancellationTokenSource cancellationTokenSource)
{
// Use the command line args with a dummy playlist path
var outputPath = state.OutputFilePath;
responseHeaders["Accept-Ranges"] = "none";
var contentType = state.GetMimeType(outputPath);
// TODO: The isHeadRequest is only here because ServiceStack will add Content-Length=0 to the response
// What we really want to do is hunt that down and remove that
var contentLength = state.EstimateContentLength || isHeadRequest ? GetEstimatedContentLength(state) : null;
if (contentLength.HasValue)
{
responseHeaders["Content-Length"] = contentLength.Value.ToString(UsCulture);
}
// Headers only
if (isHeadRequest)
{
var streamResult = ResultFactory.GetResult(new byte[] { }, contentType, responseHeaders);
var hasHeaders = streamResult as IHasHeaders;
if (hasHeaders != null)
{
if (contentLength.HasValue)
{
hasHeaders.Headers["Content-Length"] = contentLength.Value.ToString(CultureInfo.InvariantCulture);
}
else
{
if (hasHeaders.Headers.ContainsKey("Content-Length"))
{
hasHeaders.Headers.Remove("Content-Length");
}
}
}
return streamResult;
}
var transcodingLock = ApiEntryPoint.Instance.GetTranscodingLock(outputPath);
await transcodingLock.WaitAsync(cancellationTokenSource.Token).ConfigureAwait(false);
try
{
TranscodingJob job;
if (!FileSystem.FileExists(outputPath))
{
job = await StartFfMpeg(state, outputPath, cancellationTokenSource).ConfigureAwait(false);
}
else
{
job = ApiEntryPoint.Instance.OnTranscodeBeginRequest(outputPath, TranscodingJobType.Progressive);
state.Dispose();
}
var outputHeaders = new Dictionary<string, string>(StringComparer.OrdinalIgnoreCase);
outputHeaders["Content-Type"] = contentType;
// Add the response headers to the result object
foreach (var item in responseHeaders)
{
outputHeaders[item.Key] = item.Value;
}
return new ProgressiveFileCopier(FileSystem, outputPath, outputHeaders, job, Logger, CancellationToken.None);
}
finally
{
transcodingLock.Release();
}
}
/// <summary>
/// Gets the length of the estimated content.
/// </summary>
/// <param name="state">The state.</param>
/// <returns>System.Nullable{System.Int64}.</returns>
private long? GetEstimatedContentLength(StreamState state)
{
var totalBitrate = state.TotalOutputBitrate ?? 0;
if (totalBitrate > 0 && state.RunTimeTicks.HasValue)
{
return Convert.ToInt64(totalBitrate * TimeSpan.FromTicks(state.RunTimeTicks.Value).TotalSeconds / 8);
}
return null;
}
}
}