public static FFmpegStream Create([NotNull] AVStream *pStream, [NotNull] FFmpegMedia media)
{
if (pStream == null)
{
throw new ArgumentNullException(nameof(pStream));
}
if (media == null)
{
throw new ArgumentNullException(nameof(media));
}
FFmpegStream result;
var pCodec = pStream->codec;
switch (pCodec->codec_type)
{
case AVMediaType.AVMEDIA_TYPE_AUDIO:
result = new AudioStream(pStream, media);
break;
case AVMediaType.AVMEDIA_TYPE_VIDEO:
result = new VideoStream(pStream, media);
break;
case AVMediaType.AVMEDIA_TYPE_SUBTITLE:
result = new SubtitleStream(pStream, media);
break;
default:
return(null);
}
return(result);
}
public AudioStream([NotNull] AVStream *pStream, [NotNull] FFmpegMedia media)
: base(pStream, media)
{
var pCodec = pStream->codec;
ChannelCount = pCodec->channels;
SampleRate = pCodec->sample_rate;
}
/// <summary>
/// Initializes a new instance of the <see cref="FFmpegStream"/> class.
/// </summary>
protected FFmpegStream([NotNull] AVStream *pStream, FFmpegMedia media)
{
if (pStream == null)
{
throw new ArgumentNullException(nameof(pStream));
}
AVStream = pStream;
Codec = pStream->codec->codec_id;
Media = media;
Index = pStream->index;
Metadata = FFmpegUtils.ToDictionary(pStream->metadata);
}
public VideoStream([NotNull] AVStream *pStream, [NotNull] FFmpegMedia media)
: base(pStream, media)
{
var pCodec = pStream->codec;
var framerateRatio = pCodec->framerate;
FPS = Convert.ToDouble(framerateRatio.num) / Convert.ToDouble(framerateRatio.den);
FrameDuration = TimeSpan.FromTicks(TimeSpan.TicksPerSecond / Convert.ToInt64(FPS));
PixelFormat = pCodec->pix_fmt;
Height = pCodec->height;
Width = pCodec->width;
}
public SubtitleStream([NotNull] AVStream *pStream, [NotNull] FFmpegMedia media)
: base(pStream, media)
{
}