/// <summary>
/// Initializes a new instance of the <see cref="VideoStream"/> class.
/// </summary>
/// <param name="video">The video stream.</param>
/// <param name="options">The decoder settings.</param>
internal VideoStream(InputStream <VideoFrame> video, MediaOptions options)
{
stream = video;
mediaOptions = options;
frame = VideoFrame.CreateEmpty();
scaler = new Scaler();
}
/// <summary>
/// Initializes a new instance of the <see cref="VideoStream"/> class.
/// </summary>
/// <param name="video">The video stream.</param>
/// <param name="options">The decoder settings.</param>
internal VideoStream(InputStream <VideoFrame> video, MediaOptions options)
{
stream = video;
mediaOptions = options;
frame = VideoFrame.CreateEmpty();
converter = new ImageConverter();
}
/// <summary>
/// Initializes a new instance of the <see cref="MediaStream"/> class.
/// </summary>
/// <param name="stream">The associated codec.</param>
/// <param name="options">Extra options.</param>
internal MediaStream(Decoder stream, MediaOptions options)
{
Stream = stream;
Options = options;
Threshold = TimeSpan.FromSeconds(0.5).ToTimestamp(Info.TimeBase);
}
/// <summary>
/// Initializes a new instance of the <see cref="VideoStream"/> class.
/// </summary>
/// <param name="video">The video stream.</param>
/// <param name="options">The decoder settings.</param>
internal VideoStream(Decoder <VideoFrame> video, MediaOptions options)
{
stream = video;
mediaOptions = options;
frame = VideoFrame.CreateEmpty();
outputFrameSize = options.TargetVideoSize ?? video.Info.FrameSize;
converter = new Lazy <ImageConverter>(() => new ImageConverter(video.Info.FrameSize, video.Info.AVPixelFormat, outputFrameSize, (AVPixelFormat)options.VideoPixelFormat));
}
/// <summary>
/// Initializes a new instance of the <see cref="VideoStream"/> class.
/// </summary>
/// <param name="video">The video stream.</param>
/// <param name="options">The decoder settings.</param>
internal VideoStream(Decoder <VideoFrame> video, MediaOptions options)
{
stream = video;
mediaOptions = options;
outputFrameSize = options.TargetVideoSize ?? video.Info.FrameSize;
converter = new Lazy <ImageConverter>(() => new ImageConverter(video.Info.FrameSize, video.Info.AVPixelFormat, outputFrameSize, (AVPixelFormat)options.VideoPixelFormat));
threshold = TimeSpan.FromSeconds(0.5).ToTimestamp(Info.TimeBase);
}
/// <summary>
/// Initializes a new instance of the <see cref="VideoStream"/> class.
/// </summary>
/// <param name="stream">The video stream.</param>
/// <param name="options">The decoder settings.</param>
internal VideoStream(Decoder stream, MediaOptions options)
: base(stream, options)
{
OutputFrameSize = options.TargetVideoSize ?? Info.FrameSize;
Converter = new Lazy <ImageConverter>(() => new ImageConverter(Info.FrameSize, Info.AVPixelFormat, OutputFrameSize, (AVPixelFormat)options.VideoPixelFormat));
outputFrameStride = ImageData.EstimateStride(OutputFrameSize.Width, Options.VideoPixelFormat);
requiredBufferSize = outputFrameStride * OutputFrameSize.Height;
}
private unsafe MediaFile(InputContainer container, MediaOptions options)
{
this.container = container;
if (container.Video != null)
{
Video = new VideoStream(container.Video, options);
}
Info = new MediaInfo(container.Pointer);
}
private unsafe MediaFile(InputContainer container, MediaOptions options)
{
this.container = container;
var video = container.Decoders.Where(codec => codec?.Info.Type == MediaType.Video);
var audio = container.Decoders.Where(codec => codec?.Info.Type == MediaType.Audio);
VideoStreams = video.Select(codec => new VideoStream(codec, options)).ToArray();
AudioStreams = audio.Select(codec => new AudioStream(codec, options)).ToArray();
Info = new MediaInfo(container.Pointer);
}
/// <summary>
/// Opens a media stream.
/// </summary>
/// <param name="stream">A stream of the multimedia file.</param>
/// <param name="options">The decoder settings.</param>
/// <returns>The opened <see cref="MediaFile"/>.</returns>
public static MediaFile Open(Stream stream, MediaOptions options)
{
try
{
var container = InputContainer.LoadStream(stream, options);
return(new MediaFile(container, options));
}
catch (Exception ex)
{
throw new Exception("Failed to open the media stream", ex);
}
}
/// <summary>
/// Opens a media file from the specified path.
/// </summary>
/// <param name="path">A path to the media file.</param>
/// <param name="options">The decoder settings.</param>
/// <returns>The opened <see cref="MediaFile"/>.</returns>
public static MediaFile Open(string path, MediaOptions options)
{
try
{
var container = InputContainer.LoadFile(path, options);
return(new MediaFile(container, options));
}
catch (DirectoryNotFoundException)
{
throw;
}
catch (Exception ex)
{
throw new Exception("Failed to open the media file", ex);
}
}
/// <summary>
/// Initializes a new instance of the <see cref="AudioStream"/> class.
/// </summary>
/// <param name="stream">The audio stream.</param>
/// <param name="options">The decoder settings.</param>
internal AudioStream(Decoder stream, MediaOptions options)
: base(stream, options)
{
swrContext = ffmpeg.swr_alloc_set_opts(
null,
Info.ChannelLayout,
(AVSampleFormat)SampleFormat.SingleP,
Info.SampleRate,
Info.ChannelLayout,
(AVSampleFormat)Info.SampleFormat,
Info.SampleRate,
0,
null);
ffmpeg.swr_init(swrContext);
}
/// <summary>
/// Initializes a new instance of the <see cref="AudioStream"/> class.
/// </summary>
/// <param name="audio">The Audio stream.</param>
/// <param name="options">The decoder settings.</param>
internal AudioStream(Decoder <AudioFrame> audio, MediaOptions options)
{
stream = audio;
mediaOptions = options;
frame = AudioFrame.CreateEmpty();
}
