/// <summary>
/// <see cref="ffmpeg.avformat_write_header(AVFormatContext*, AVDictionary**)"/>
/// </summary>
/// <param name="options"></param>
public int Initialize(MediaDictionary options = null)
{
unsafe
{
return(ffmpeg.avformat_write_header(pFormatContext, options).ThrowExceptionIfError());
}
}
public void Init(MediaDictionary options)
{
unsafe
{
ffmpeg.avfilter_init_dict(pFilterContext, options).ThrowExceptionIfError();
}
}
/// <summary>
/// Load path
/// </summary>
/// <param name="url"></param>
/// <param name="iformat"></param>
/// <param name="options"></param>
public MediaReader(string url, InFormat iformat = null, MediaDictionary options = null)
{
unsafe
{
fixed(AVFormatContext **ppFormatContext = &pFormatContext)
{
ffmpeg.avformat_open_input(ppFormatContext, url, iformat, options).ThrowExceptionIfError();
}
ffmpeg.avformat_find_stream_info(pFormatContext, null).ThrowExceptionIfError();
base.Format = iformat ?? new InFormat(pFormatContext->iformat);
for (int i = 0; i < pFormatContext->nb_streams; i++)
{
AVStream * pStream = pFormatContext->streams[i];
MediaDecode codec = MediaDecode.CreateDecode(pStream->codecpar->codec_id, _ =>
{
ffmpeg.avcodec_parameters_to_context(_, pStream->codecpar);
});
streams.Add(new MediaStream(pStream)
{
Codec = codec
});
}
}
}
public MediaReader(Stream stream, InFormat iformat = null, MediaDictionary options = null)
{
baseStream = stream;
avio_Alloc_Context_Read_Packet = ReadFunc;
avio_Alloc_Context_Seek = SeekFunc;
pFormatContext = ffmpeg.avformat_alloc_context();
pFormatContext->pb = ffmpeg.avio_alloc_context((byte *)ffmpeg.av_malloc(bufferLength), bufferLength, 0, null,
avio_Alloc_Context_Read_Packet, null, avio_Alloc_Context_Seek);
fixed(AVFormatContext **ppFormatContext = &pFormatContext)
{
ffmpeg.avformat_open_input(ppFormatContext, null, iformat, options).ThrowExceptionIfError();
}
ffmpeg.avformat_find_stream_info(pFormatContext, null).ThrowExceptionIfError();
base.Format = iformat ?? new InFormat(pFormatContext->iformat);
for (int i = 0; i < pFormatContext->nb_streams; i++)
{
AVStream * pStream = pFormatContext->streams[i];
MediaDecode codec = MediaDecode.CreateDecode(pStream->codecpar->codec_id, _ =>
{
ffmpeg.avcodec_parameters_to_context(_, pStream->codecpar);
});
streams.Add(new MediaStream(pStream)
{
Codec = codec
});
}
}
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));
}
/// <summary>
/// write to file.
/// <para><see cref="ffmpeg.avformat_alloc_output_context2(AVFormatContext**, AVOutputFormat*, string, string)"/></para>
/// <para><see cref="ffmpeg.avio_open(AVIOContext**, string, int)"/></para>
/// </summary>
/// <param name="file"></param>
/// <param name="oformat"></param>
/// <param name="options"></param>
public MediaWriter(string file, OutFormat oformat = null, MediaDictionary options = null)
{
fixed(AVFormatContext **ppFormatContext = &pFormatContext)
{
ffmpeg.avformat_alloc_output_context2(ppFormatContext, oformat, null, file).ThrowIfError();
}
base.Format = oformat ?? new OutFormat(pFormatContext->oformat);
if ((pFormatContext->oformat->flags & ffmpeg.AVFMT_NOFILE) == 0)
{
ffmpeg.avio_open2(&pFormatContext->pb, file, ffmpeg.AVIO_FLAG_WRITE, null, options).ThrowIfError();
}
}
public MediaWriter(Stream stream, OutFormat oformat, MediaDictionary options = null)
{
baseStream = stream;
avio_Alloc_Context_Read_Packet = ReadFunc;
avio_Alloc_Context_Write_Packet = WriteFunc;
avio_Alloc_Context_Seek = SeekFunc;
pFormatContext = ffmpeg.avformat_alloc_context();
pFormatContext->oformat = oformat;
base.Format = oformat;
if ((pFormatContext->oformat->flags & ffmpeg.AVFMT_NOFILE) == 0)
{
pFormatContext->pb = ffmpeg.avio_alloc_context((byte *)ffmpeg.av_malloc(bufferLength), bufferLength, 1, null,
avio_Alloc_Context_Read_Packet, avio_Alloc_Context_Write_Packet, avio_Alloc_Context_Seek);
}
}
/// <summary>
/// NOTE: ffmpeg cannot get device information through code, only print the display.
/// </summary>
/// <param name="device"></param>
/// <param name="parame"></param>
/// <param name="options">options for <see cref=" ffmpeg.avformat_open_input"/></param>
/// <returns></returns>
public static void PrintDeviceInfos(MediaFormat device, string parame, MediaDictionary options = null)
{
AVFormatContext *pFmtCtx = ffmpeg.avformat_alloc_context();
ffmpeg.av_log(null, (int)LogLevel.Verbose, $"--------------------------{Environment.NewLine}");
if (device is InFormat iformat)
{
ffmpeg.avformat_open_input(&pFmtCtx, parame, iformat, options);
}
else if (device is OutFormat oformat)
{
ffmpeg.avformat_alloc_output_context2(&pFmtCtx, oformat, null, parame);
}
ffmpeg.av_log(null, (int)LogLevel.Verbose, $"--------------------------{Environment.NewLine}");
ffmpeg.avformat_free_context(pFmtCtx);
}
/// <summary>
/// alloc <see cref="AVCodecContext"/> and <see cref="ffmpeg.avcodec_open2(AVCodecContext*, AVCodec*, AVDictionary**)"/>
/// </summary>
/// <param name="setBeforeOpen">
/// set <see cref="AVCodecContext"/> after <see cref="ffmpeg.avcodec_alloc_context3(AVCodec*)"/> and before <see cref="ffmpeg.avcodec_open2(AVCodecContext*, AVCodec*, AVDictionary**)"/>
/// </param>
/// <param name="flags">
/// check <see cref="MediaFormat.Flags"/> & <see cref="ffmpeg.AVFMT_GLOBALHEADER"/> set <see cref="ffmpeg.AV_CODEC_FLAG_GLOBAL_HEADER"/>
/// </param>
/// <param name="opts">options for "avcodec_open2"</param>
public override int Initialize(Action <MediaCodec> setBeforeOpen = null, int flags = 0, MediaDictionary opts = null)
{
pCodecContext = ffmpeg.avcodec_alloc_context3(pCodec);
if (pCodecContext == null)
{
throw new FFmpegException(FFmpegException.NullReference);
}
setBeforeOpen?.Invoke(this);
if ((flags & ffmpeg.AVFMT_GLOBALHEADER) != 0)
{
pCodecContext->flags |= ffmpeg.AV_CODEC_FLAG_GLOBAL_HEADER;
}
if (pCodec == null)
{
throw new FFmpegException(FFmpegException.NullReference);
}
return(ffmpeg.avcodec_open2(pCodecContext, pCodec, opts).ThrowIfError());
}
public static MediaDecoder CreateDecoder(AVCodecID codecId, Action <MediaCodec> setBeforeOpen = null, MediaDictionary opts = null)
{
MediaDecoder encode = new MediaDecoder(codecId);
encode.Initialize(setBeforeOpen, 0, opts);
return(encode);
}
private static IntPtr av_dict_get_safe(MediaDictionary dict, string key, IntPtr prev, AVDictReadFlags flags)
{
return((IntPtr)ffmpeg.av_dict_get(dict.pDictionary, key, (AVDictionaryEntry *)prev, (int)flags));
}
/// <summary>
/// Load stream, default buffer size is 4096
/// </summary>
/// <param name="stream"></param>
/// <param name="iformat"></param>
/// <param name="options"></param>
public MediaReader(Stream stream, InFormat iformat = null, MediaDictionary options = null)
: this(stream, 4096, iformat, options)
{
}
public unsafe static IReadOnlyList <IReadOnlyList <MediaDevice> > GetDeviceInfos(MediaFormat device, MediaDictionary options = null)
{
string parame = "list";
AVFormatContext *pFmtCtx = ffmpeg.avformat_alloc_context();
Trace.TraceInformation("--------------------------");
if (device is InFormat iformat)
{
ffmpeg.avformat_open_input(&pFmtCtx, parame, iformat, options);
}
else if (device is OutFormat oformat)
{
ffmpeg.avformat_alloc_output_context2(&pFmtCtx, oformat, null, parame);
}
Trace.TraceInformation("--------------------------");
ffmpeg.avformat_free_context(pFmtCtx);
return(new List <List <MediaDevice> >());
}
public static MediaEncoder CreateEncode(string codecName, int flags, Action <MediaCodec> setBeforeOpen = null, MediaDictionary opts = null)
{
MediaEncoder encode = new MediaEncoder(codecName);
encode.Initialize(setBeforeOpen, flags, opts);
return(encode);
}
/// <summary>
/// <see cref="ffmpeg.avformat_write_header(AVFormatContext*, AVDictionary**)"/>
/// </summary>
/// <param name="options"></param>
public void Initialize(MediaDictionary options = null)
{
ffmpeg.avformat_write_header(pFormatContext, options).ThrowExceptionIfError();
}
/// <summary>
/// alloc <see cref="AVCodecContext"/> and <see cref="ffmpeg.avcodec_open2(AVCodecContext*, AVCodec*, AVDictionary**)"/>
/// </summary>
/// <param name="setBeforeOpen">
/// set <see cref="AVCodecContext"/> after <see cref="ffmpeg.avcodec_alloc_context3(AVCodec*)"/> and before <see cref="ffmpeg.avcodec_open2(AVCodecContext*, AVCodec*, AVDictionary**)"/>
/// </param>
/// <param name="flags">no used</param>
/// <param name="opts">options for "avcodec_open2"</param>
public override void Initialize(Action <MediaCodec> setBeforeOpen = null, int flags = 0, MediaDictionary opts = null)
{
pCodecContext = ffmpeg.avcodec_alloc_context3(pCodec);
setBeforeOpen?.Invoke(this);
if (pCodec != null)
{
ffmpeg.avcodec_open2(pCodecContext, pCodec, opts).ThrowExceptionIfError();
}
}
public static MediaDecode CreateDecode(string codecName, Action <MediaCodec> setBeforeOpen = null, MediaDictionary opts = null)
{
MediaDecode encode = new MediaDecode(codecName);
encode.Initialize(setBeforeOpen, 0, opts);
return(encode);
}
/// <summary>
/// alloc <see cref="AVCodecContext"/> and <see cref="ffmpeg.avcodec_open2(AVCodecContext*, AVCodec*, AVDictionary**)"/>
/// </summary>
/// <param name="setBeforeOpen">
/// set <see cref="AVCodecContext"/> after <see cref="ffmpeg.avcodec_alloc_context3(AVCodec*)"/> and before <see cref="ffmpeg.avcodec_open2(AVCodecContext*, AVCodec*, AVDictionary**)"/>
/// </param>
/// <param name="flags">
/// check <see cref="MediaFormat.Flags"/> & <see cref="ffmpeg.AVFMT_GLOBALHEADER"/> set <see cref="ffmpeg.AV_CODEC_FLAG_GLOBAL_HEADER"/>
/// </param>
/// <param name="opts">options for "avcodec_open2"</param>
public override void Initialize(Action <MediaCodec> setBeforeOpen = null, int flags = 0, MediaDictionary opts = null)
{
unsafe
{
pCodecContext = ffmpeg.avcodec_alloc_context3(pCodec);
setBeforeOpen?.Invoke(this);
if ((flags & ffmpeg.AVFMT_GLOBALHEADER) != 0)
{
pCodecContext->flags |= ffmpeg.AV_CODEC_FLAG_GLOBAL_HEADER;
}
if (pCodec != null)
{
ffmpeg.avcodec_open2(pCodecContext, pCodec, opts).ThrowExceptionIfError();
}
}
}
public static MediaEncode CreateEncode(AVCodecID codecId, int flags, Action <MediaCodec> setBeforeOpen = null, MediaDictionary opts = null)
{
MediaEncode encode = new MediaEncode(codecId);
encode.Initialize(setBeforeOpen, flags, opts);
return(encode);
}
public abstract int Initialize(Action <MediaCodec> setBeforeOpen = null, int flags = 0, MediaDictionary opts = null);
/// <summary>
/// write to stream,default buffersize 4096
/// </summary>
/// <param name="stream"></param>
/// <param name="oformat"></param>
/// <param name="options"></param>
public MediaWriter(Stream stream, OutFormat oformat, MediaDictionary options = null)
: this(stream, 4096, oformat, options)
{
}
