/// <summary>
/// Returns a transcoded file from the server.
/// </summary>
/// <param name="state">The current <see cref="StreamState"/>.</param>
/// <param name="isHeadRequest">Whether the current request is a HTTP HEAD request so only the headers get returned.</param>
/// <param name="controller">The <see cref="ControllerBase"/> managing the response.</param>
/// <param name="transcodingJobHelper">The <see cref="TranscodingJobHelper"/> singleton.</param>
/// <param name="ffmpegCommandLineArguments">The command line arguments to start ffmpeg.</param>
/// <param name="request">The <see cref="HttpRequest"/> starting the transcoding.</param>
/// <param name="transcodingJobType">The <see cref="TranscodingJobType"/>.</param>
/// <param name="cancellationTokenSource">The <see cref="CancellationTokenSource"/>.</param>
/// <returns>A <see cref="Task{ActionResult}"/> containing the transcoded file.</returns>
public static async Task <ActionResult> GetTranscodedFile(
StreamState state,
bool isHeadRequest,
ControllerBase controller,
TranscodingJobHelper transcodingJobHelper,
string ffmpegCommandLineArguments,
HttpRequest request,
TranscodingJobType transcodingJobType,
CancellationTokenSource cancellationTokenSource)
{
// Use the command line args with a dummy playlist path
var outputPath = state.OutputFilePath;
controller.Response.Headers[HeaderNames.AcceptRanges] = "none";
var contentType = state.GetMimeType(outputPath);
// Headers only
if (isHeadRequest)
{
return(controller.File(Array.Empty <byte>(), contentType));
}
var transcodingLock = transcodingJobHelper.GetTranscodingLock(outputPath);
await transcodingLock.WaitAsync(cancellationTokenSource.Token).ConfigureAwait(false);
try
{
TranscodingJobDto?job;
if (!File.Exists(outputPath))
{
job = await transcodingJobHelper.StartFfMpeg(state, outputPath, ffmpegCommandLineArguments, request, transcodingJobType, cancellationTokenSource).ConfigureAwait(false);
}
else
{
job = transcodingJobHelper.OnTranscodeBeginRequest(outputPath, TranscodingJobType.Progressive);
state.Dispose();
}
var memoryStream = new MemoryStream();
await new ProgressiveFileCopier(outputPath, job, transcodingJobHelper, CancellationToken.None).WriteToAsync(memoryStream, CancellationToken.None).ConfigureAwait(false);
memoryStream.Position = 0;
return(controller.File(memoryStream, contentType));
}
finally
{
transcodingLock.Release();
}
}
/// <summary>
/// Returns a transcoded file from the server.
/// </summary>
/// <param name="state">The current <see cref="StreamState"/>.</param>
/// <param name="isHeadRequest">Whether the current request is a HTTP HEAD request so only the headers get returned.</param>
/// <param name="httpContext">The current http context.</param>
/// <param name="transcodingJobHelper">The <see cref="TranscodingJobHelper"/> singleton.</param>
/// <param name="ffmpegCommandLineArguments">The command line arguments to start ffmpeg.</param>
/// <param name="transcodingJobType">The <see cref="TranscodingJobType"/>.</param>
/// <param name="cancellationTokenSource">The <see cref="CancellationTokenSource"/>.</param>
/// <returns>A <see cref="Task{ActionResult}"/> containing the transcoded file.</returns>
public static async Task <ActionResult> GetTranscodedFile(
StreamState state,
bool isHeadRequest,
HttpContext httpContext,
TranscodingJobHelper transcodingJobHelper,
string ffmpegCommandLineArguments,
TranscodingJobType transcodingJobType,
CancellationTokenSource cancellationTokenSource)
{
// Use the command line args with a dummy playlist path
var outputPath = state.OutputFilePath;
httpContext.Response.Headers[HeaderNames.AcceptRanges] = "none";
var contentType = state.GetMimeType(outputPath);
// Headers only
if (isHeadRequest)
{
httpContext.Response.Headers[HeaderNames.ContentType] = contentType;
return(new OkResult());
}
var transcodingLock = transcodingJobHelper.GetTranscodingLock(outputPath);
await transcodingLock.WaitAsync(cancellationTokenSource.Token).ConfigureAwait(false);
try
{
TranscodingJobDto?job;
if (!File.Exists(outputPath))
{
job = await transcodingJobHelper.StartFfMpeg(state, outputPath, ffmpegCommandLineArguments, httpContext.Request, transcodingJobType, cancellationTokenSource).ConfigureAwait(false);
}
else
{
job = transcodingJobHelper.OnTranscodeBeginRequest(outputPath, TranscodingJobType.Progressive);
state.Dispose();
}
var stream = new ProgressiveFileStream(outputPath, job, transcodingJobHelper);
return(new FileStreamResult(stream, contentType));
}
finally
{
transcodingLock.Release();
}
}