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using MediaBrowser.Common.Extensions;
using MediaBrowser.Common.IO;
using MediaBrowser.Common.Net.Handlers;
using MediaBrowser.Controller.Entities;
using MediaBrowser.Model.Entities;
using System;
using System.IO;
using System.Net;
using System.Threading.Tasks;
namespace MediaBrowser.Api.Streaming
{
/// <summary>
/// Class BaseMediaHandler
/// </summary>
/// <typeparam name="TBaseItemType">The type of the T base item type.</typeparam>
public abstract class BaseProgressiveStreamingHandler<TBaseItemType> : BaseStreamingHandler<TBaseItemType>
where TBaseItemType : BaseItem, IHasMediaStreams, new()
{
/// <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="ctx">The CTX.</param>
/// <returns>Task.</returns>
public override Task ProcessRequest(HttpListenerContext ctx)
{
HttpListenerContext = ctx;
if (!RequiresConversion())
{
return new StaticFileHandler(Kernel)
{
Path = LibraryItem.Path
}.ProcessRequest(ctx);
}
var outputPath = OutputFilePath;
if (File.Exists(outputPath) && !Plugin.Instance.HasActiveTranscodingJob(outputPath, TranscodingJobType.Progressive))
{
return new StaticFileHandler(Kernel)
{
Path = outputPath
}.ProcessRequest(ctx);
}
return base.ProcessRequest(ctx);
}
/// <summary>
/// Requireses the conversion.
/// </summary>
/// <returns><c>true</c> if XXXX, <c>false</c> otherwise</returns>
protected bool RequiresConversion()
{
return !GetBoolQueryStringParam("static");
}
/// <summary>
/// Writes the response to output stream.
/// </summary>
/// <param name="stream">The stream.</param>
/// <param name="responseInfo">The response info.</param>
/// <param name="contentLength">Length of the content.</param>
/// <returns>Task.</returns>
protected override async Task WriteResponseToOutputStream(Stream stream, ResponseInfo responseInfo, long? contentLength)
{
// Use the command line args with a dummy playlist path
var outputPath = OutputFilePath;
if (!File.Exists(outputPath))
{
await StartFFMpeg(outputPath).ConfigureAwait(false);
}
else
{
Plugin.Instance.OnTranscodeBeginRequest(outputPath, TranscodingJobType.Progressive);
}
try
{
await StreamFile(outputPath, stream).ConfigureAwait(false);
}
catch (Exception ex)
{
//Logger.ErrorException("Error streaming media", ex);
}
finally
{
Plugin.Instance.OnTranscodeEndRequest(outputPath, TranscodingJobType.Progressive);
}
}
/// <summary>
/// Streams the file.
/// </summary>
/// <param name="path">The path.</param>
/// <param name="outputStream">The output stream.</param>
/// <returns>Task{System.Boolean}.</returns>
private async Task StreamFile(string path, Stream outputStream)
{
var eofCount = 0;
long position = 0;
using (var fs = new FileStream(path, FileMode.Open, FileAccess.Read, FileShare.ReadWrite, StreamDefaults.DefaultFileStreamBufferSize, FileOptions.Asynchronous))
{
while (eofCount < 15)
{
await fs.CopyToAsync(outputStream).ConfigureAwait(false);
var fsPosition = fs.Position;
var bytesRead = fsPosition - position;
//Logger.LogInfo("Streamed {0} bytes from file {1}", bytesRead, path);
if (bytesRead == 0)
{
eofCount++;
await Task.Delay(100).ConfigureAwait(false);
}
else
{
eofCount = 0;
}
position = fsPosition;
}
}
}
/// <summary>
/// Deletes the partial stream files.
/// </summary>
/// <param name="outputFilePath">The output file path.</param>
protected override void DeletePartialStreamFiles(string outputFilePath)
{
File.Delete(outputFilePath);
}
}
}
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