/// <summary>
/// $"width={width}:height={height}:pix_fmt={format}:time_base={timebase.num}/{timebase.den}:pixel_aspect={aspect.num}/{aspect.den}:frame_rate={framerate.num}/{framerate.den}:sws_param={swsparam}";
/// </summary>
/// <param name="filter"></param>
/// <param name="width"></param>
/// <param name="height"></param>
/// <param name="format"></param>
/// <param name="timebase"></param>
/// <param name="aspect"></param>
/// <param name="framerate"></param>
/// <param name="swsparam"></param>
/// <param name="contextName"></param>
/// <returns></returns>
public MediaFilterContext AddVideoSrcFilter(MediaFilter filter, int width, int height, AVPixelFormat format, AVRational timebase, AVRational aspect, AVRational framerate = default, string swsparam = null, string contextName = null)
{
MediaFilterContext filterContext = AddFilter(filter, _ =>
{
ffmpeg.av_opt_set_int(_, "width", width, ffmpeg.AV_OPT_SEARCH_CHILDREN);
ffmpeg.av_opt_set_int(_, "height", height, ffmpeg.AV_OPT_SEARCH_CHILDREN);
ffmpeg.av_opt_set(_, "pix_fmt", ffmpeg.av_get_pix_fmt_name(format), ffmpeg.AV_OPT_SEARCH_CHILDREN);
ffmpeg.av_opt_set_q(_, "pixel_aspect", aspect, ffmpeg.AV_OPT_SEARCH_CHILDREN);
ffmpeg.av_opt_set_q(_, "time_base", timebase, ffmpeg.AV_OPT_SEARCH_CHILDREN);
if (framerate.den != 0) // if is default value(0/0), not set frame_rate.
{
ffmpeg.av_opt_set_q(_, "frame_rate", framerate, ffmpeg.AV_OPT_SEARCH_CHILDREN); // not set is 0/1
}
if (swsparam != null)
{
ffmpeg.av_opt_set(_, "sws_param", swsparam, ffmpeg.AV_OPT_SEARCH_CHILDREN);
}
}, contextName);
if (filterContext.NbInputs > 0)
{
throw new FFmpegException(FFmpegException.NotSourcesFilter);
}
if (ffmpeg.avfilter_pad_get_type(filterContext.AVFilterContext.output_pads, 0) != AVMediaType.AVMEDIA_TYPE_VIDEO)
{
throw new FFmpegException(FFmpegException.FilterTypeError);
}
return(filterContext);
}
public MediaFilterContext AddAudioSrcFilter(MediaFilter filter, ulong channelLayout, int samplerate, AVSampleFormat format, string contextName = null)
{
MediaFilterContext filterContext = AddFilter(filter, _ =>
{
fixed(byte *p = new byte[64])
{
ffmpeg.av_get_channel_layout_string(p, 64, 0, channelLayout);
ffmpeg.av_opt_set(_, "channel_layout", ((IntPtr)p).PtrToStringUTF8(), ffmpeg.AV_OPT_SEARCH_CHILDREN);
ffmpeg.av_opt_set(_, "sample_fmt", ffmpeg.av_get_sample_fmt_name(format), ffmpeg.AV_OPT_SEARCH_CHILDREN);
ffmpeg.av_opt_set_q(_, "time_base", new AVRational()
{
num = 1, den = samplerate
}, ffmpeg.AV_OPT_SEARCH_CHILDREN);
ffmpeg.av_opt_set_int(_, "sample_rate", samplerate, ffmpeg.AV_OPT_SEARCH_CHILDREN);
}
}, contextName);
if (filterContext.NbOutputs > 0)
{
throw new FFmpegException(FFmpegException.NotSourcesFilter);
}
if (ffmpeg.avfilter_pad_get_type(filterContext.AVFilterContext.input_pads, 0) != AVMediaType.AVMEDIA_TYPE_AUDIO)
{
throw new FFmpegException(FFmpegException.FilterTypeError);
}
return(filterContext);
}
public MediaFilterContext AddFilter(MediaFilter filter, MediaDictionary options, string contextName = null)
{
AVFilterContext *p = ffmpeg.avfilter_graph_alloc_filter(pFilterGraph, filter, contextName);
ffmpeg.avfilter_init_dict(p, options).ThrowExceptionIfError();
return(CreateAndUpdate(p));
}
public MediaFilterContext AddAudioSinkFilter(MediaFilter filter, AVSampleFormat[] formats = null, int[] sampleRates = null, ulong[] channelLayouts = null, int[] channelCounts = null, int allChannelCounts = 0, string contextName = null)
{
MediaFilterContext filterContext = AddFilter(filter, _ =>
{
fixed(void *pfmts = formats)
fixed(void *pSampleRates = sampleRates)
fixed(void *pChLayouts = channelLayouts)
fixed(void *pChCounts = channelCounts)
{
ffmpeg.av_opt_set_bin(_, "sample_fmts", (byte *)pfmts, sizeof(AVSampleFormat) * formats.Length, ffmpeg.AV_OPT_SEARCH_CHILDREN);
ffmpeg.av_opt_set_bin(_, "sample_rates", (byte *)pSampleRates, sizeof(int) * sampleRates.Length, ffmpeg.AV_OPT_SEARCH_CHILDREN);
ffmpeg.av_opt_set_bin(_, "channel_layouts", (byte *)pChLayouts, sizeof(ulong) * channelLayouts.Length, ffmpeg.AV_OPT_SEARCH_CHILDREN);
ffmpeg.av_opt_set_bin(_, "channel_counts", (byte *)pChCounts, sizeof(int) * channelCounts.Length, ffmpeg.AV_OPT_SEARCH_CHILDREN);
ffmpeg.av_opt_set_int(_, "all_channel_counts", allChannelCounts, ffmpeg.AV_OPT_SEARCH_CHILDREN);
}
}, contextName);
if (filterContext.NbOutputs > 0)
{
throw new FFmpegException(FFmpegException.NotSinksFilter);
}
if (ffmpeg.avfilter_pad_get_type(filterContext.AVFilterContext.input_pads, 0) != AVMediaType.AVMEDIA_TYPE_AUDIO)
{
throw new FFmpegException(FFmpegException.FilterTypeError);
}
return(filterContext);
}
public MediaFilterContext AddVideoSinkFilter(MediaFilter filter, AVPixelFormat[] formats = null, string contextName = null)
{
unsafe
{
MediaFilterContext filterContext = AddFilter(filter, _ =>
{
if (formats != null)
{
fixed(void *pixelFmts = formats)
{
ffmpeg.av_opt_set_bin(_, "pixel_fmts", (byte *)pixelFmts, sizeof(AVPixelFormat) * formats.Length, ffmpeg.AV_OPT_SEARCH_CHILDREN);
}
}
}, contextName);
if (filterContext.NbOutputs > 0)
{
throw new FFmpegException(FFmpegException.NotSinksFilter);
}
if (ffmpeg.avfilter_pad_get_type(filterContext.AVFilterContext.input_pads, 0) != AVMediaType.AVMEDIA_TYPE_VIDEO)
{
throw new FFmpegException(FFmpegException.FilterTypeError);
}
return(filterContext);
}
}
internal MediaFilterContext(AVFilterContext *p)
{
if (p == null)
{
throw new FFmpegException(FFmpegException.NullReference);
}
pFilterContext = p;
Filter = new MediaFilter(p->filter);
}
public MediaFilterContext(IntPtr pAVFilterContext)
{
if (pAVFilterContext == IntPtr.Zero)
{
throw new FFmpegException(FFmpegException.NullReference);
}
pFilterContext = (AVFilterContext *)pAVFilterContext;
Filter = new MediaFilter(pFilterContext->filter);
}
public MediaFilterContext AddFilter(MediaFilter filter, Action <MediaFilterContext> options, string contextName = null)
{
AVFilterContext *p = ffmpeg.avfilter_graph_alloc_filter(pFilterGraph, filter, contextName);
if (options != null)
{
options.Invoke(new MediaFilterContext(p));
}
ffmpeg.avfilter_init_str(p, null).ThrowExceptionIfError();
return(CreateAndUpdate(p));
}