internal static unsafe void AvFormatSeekFile(AvFormatContext formatContext, double time)
{
int result = ffmpeg.avformat_seek_file((AVFormatContext *)formatContext.FormatPtr,
formatContext.BestAudioStreamIndex, long.MinValue, (long)time, (long)time, 0);
FfmpegException.Try(result, "avformat_seek_file");
}
/// <summary>
/// Initializes a new instance of the <see cref="FfmpegDecoder" /> class based on a specified filename or url.
/// </summary>
/// <param name="url">A url containing a filename or web url. </param>
/// <exception cref="FfmpegException">
/// Any ffmpeg error.
/// </exception>
/// <exception cref="System.NotSupportedException">
/// DBL format is not supported.
/// or
/// Audio Sample Format not supported.
/// </exception>
/// <exception cref="ArgumentNullException">uri</exception>
public FfmpegDecoder(string url)
{
const int invalidArgument = unchecked ((int)0xffffffea);
_uri = new Uri(url);
try
{
_formatContext = new AvFormatContext(url);
Initialize();
}
catch (FfmpegException ex)
{
if (ex.ErrorCode == invalidArgument && "avformat_open_input".Equals(ex.Function, StringComparison.OrdinalIgnoreCase))
{
if (!TryInitializeWithFileAsStream(url))
{
throw;
}
}
else
{
throw;
}
}
}
/// <summary>
/// Releases unmanaged and - optionally - managed resources.
/// </summary>
/// <param name="disposing"><c>true</c> to release both managed and unmanaged resources; <c>false</c> to release only unmanaged resources.</param>
protected void Dispose(bool disposing)
{
GC.SuppressFinalize(this);
if (disposing)
{
if (_disposeStream && _stream != null)
{
_stream.Dispose();
_stream = null;
}
if (_formatContext != null)
{
_formatContext.Dispose();
_formatContext = null;
}
if (_ffmpegStream != null)
{
_ffmpegStream.Dispose();
_ffmpegStream = null;
}
}
}
private void InitializeWithStream(Stream stream, bool disposeStream)
{
_stream = stream;
_disposeStream = disposeStream;
_ffmpegStream = new FfmpegStream(stream);
_formatContext = new AvFormatContext(_ffmpegStream);
Initialize();
}
/// <summary>
/// Initializes a new instance of the <see cref="FfmpegDecoder" /> class based on a <see cref="Stream" />.
/// </summary>
/// <param name="stream">The stream.</param>
/// <exception cref="FfmpegException">Any ffmpeg error.</exception>
/// <exception cref="System.ArgumentNullException">stream</exception>
/// <exception cref="ArgumentException">Stream is not readable.</exception>
/// <exception cref="System.OutOfMemoryException">Could not allocate FormatContext.</exception>
/// <exception cref="System.NotSupportedException">
/// DBL format is not supported.
/// or
/// Audio Sample Format not supported.
/// </exception>
public FfmpegDecoder(Stream stream)
{
if (stream == null)
{
throw new ArgumentNullException("stream");
}
_ffmpegStream = new FfmpegStream(stream);
_formatContext = new AvFormatContext(_ffmpegStream);
Initialize();
}
public unsafe AvFrame(AvFormatContext formatContext)
{
_formatContext = formatContext;
_frame = FfmpegCalls.AvFrameAlloc();
}
/// <summary>
/// Initializes a new instance of the <see cref="FfmpegDecoder" /> class based on a specified filename or url.
/// </summary>
/// <param name="url">A url containing a filename or web url. </param>
/// <exception cref="FfmpegException">
/// Any ffmpeg error.
/// </exception>
/// <exception cref="System.NotSupportedException">
/// DBL format is not supported.
/// or
/// Audio Sample Format not supported.
/// </exception>
/// <exception cref="ArgumentNullException">uri</exception>
public FfmpegDecoder(string url)
{
_uri = new Uri(url);
_formatContext = new AvFormatContext(url);
Initialize();
}
internal static unsafe bool AvReadFrame(AvFormatContext formatContext, AVPacket *packet)
{
int result = ffmpeg.av_read_frame((AVFormatContext *)formatContext.FormatPtr, packet);
return(result >= 0);
}
