public void AudioFrameNext(Format.Audio cFormatSource, Frame cFrameSource)
{
if (NULL == _pStreamAudio)
throw new Exception("there is no audio stream in file");
if (null == cFrameSource)
return;
AVStream stAVStream = (AVStream)Marshal.PtrToStructure(_pStreamAudio, typeof(AVStream));
//_nPTSAudio = (double)stAVStream.pts.val * stAVStream.time_base.num / stAVStream.time_base.den;
Frame cFrame;
AVPacket stAVPacket = new AVPacket();
IntPtr pAVPacket;
if (null == _cFrameAudio)
_cFrameAudio = new Frame(_cFormatAudio, _cFormatAudio.nBufferSize);
Frame[] aFrames = cFormatSource.Convert(_cFormatAudio, cFrameSource, _cFrameAudio);
for (int nIndx = 0; aFrames.Length > nIndx; nIndx++)
{
cFrame = aFrames[nIndx];
pAVPacket = Functions.av_malloc((uint)(Marshal.SizeOf(stAVPacket)));
Functions.av_init_packet(pAVPacket);
stAVPacket = (AVPacket)Marshal.PtrToStructure(pAVPacket, typeof(AVPacket));
if (cFrame.nPTS != Constants.AV_NOPTS_VALUE)
stAVPacket.pts = Functions.av_rescale_q(cFrame.nPTS, _cFormatAudio.stAVCodecContext.time_base, stAVStream.time_base);
//stAVPacket.pts = stAVPacket.dts = Functions.av_rescale_q((long)_nPTSAudio, _cFormatVideo.stAVCodecContext.time_base, stAVStream.time_base);
stAVPacket.flags |= Constants.AV_PKT_FLAG_KEY;
stAVPacket.stream_index = stAVStream.index;
stAVPacket.size = cFrame.nLength;
stAVPacket.data = cFrame.p;
Marshal.StructureToPtr(stAVPacket, pAVPacket, true);
_cFormatCtx.PacketWrite(pAVPacket);
Functions.av_free_packet(pAVPacket);
Functions.av_freep(ref pAVPacket);
cFrame.Dispose();
//_nPTSAudio++;
}
}
private void FrameNext(IntPtr pStream, Format cFormatSource, Frame cFrameSource, Format cFormatTarget, IntPtr pBitStreamFilter)
{
AVStream stAVStream = (AVStream)Marshal.PtrToStructure(pStream, typeof(AVStream));
Frame[] aFrames;
if (null == cFormatSource)
{
if (null == cFrameSource && cFormatTarget is Format.Audio)
aFrames = ((Format.Audio)cFormatTarget).Flush();
else
aFrames = new Frame[] { new Frame(null, cFrameSource.aBytes.ToArray()) { nPTS = cFrameSource.nPTS, bKeyframe = cFrameSource.bKeyframe } };
}
else
aFrames = cFormatSource.Convert(cFormatTarget, cFrameSource);
IntPtr pAVPacket;
AVPacket stAVPacket;
for (int nIndx = 0; aFrames.Length > nIndx; nIndx++)
{
pAVPacket = Functions.av_malloc((uint)(Marshal.SizeOf(typeof(AVPacket))));
Functions.av_init_packet(pAVPacket);
stAVPacket = (AVPacket)Marshal.PtrToStructure(pAVPacket, typeof(AVPacket));
if (aFrames[nIndx].nPTS != Constants.AV_NOPTS_VALUE)
stAVPacket.pts = Functions.av_rescale_q(aFrames[nIndx].nPTS, cFormatTarget.stAVCodecContext.time_base, stAVStream.time_base);
if (aFrames[nIndx].bKeyframe)
stAVPacket.flags |= Constants.AV_PKT_FLAG_KEY;
stAVPacket.stream_index = stAVStream.index;
stAVPacket.size = aFrames[nIndx].nLength;
stAVPacket.data = aFrames[nIndx].pBytes;
lock(_aFramesLocked)
_aFramesLocked.Add(aFrames[nIndx]);
stAVPacket.buf = Functions.av_buffer_create(stAVPacket.data, stAVPacket.size, Marshal.GetFunctionPointerForDelegate(_fFrameUnlock), aFrames[nIndx], 0);
//System.IO.File.AppendAllText("packets", stAVPacket.pts + "\t" + stAVPacket.size + Environment.NewLine);
if (NULL != pBitStreamFilter && 0 != Functions.av_bitstream_filter_filter(pBitStreamFilter, cFormatTarget.pAVCodecContext, NULL, ref stAVPacket.data, ref stAVPacket.size, stAVPacket.data, stAVPacket.size, aFrames[nIndx].bKeyframe))
throw new Exception("error while filter a frame");
Marshal.StructureToPtr(stAVPacket, pAVPacket, true);
lock(_cFormatCtx)
_cFormatCtx.PacketWrite(pAVPacket);
//Functions.av_free_packet(pAVPacket);
//Functions.av_freep(ref pAVPacket);
}
}
public void VideoFrameNext(Format.Video cFormatSource, Frame cFrameSource)
{
if (NULL == _pStreamVideo)
throw new Exception("there is no video stream in file");
AVStream stAVStream = (AVStream)Marshal.PtrToStructure(_pStreamVideo, typeof(AVStream));
//_nPTSVideo = (double)stAVStream.pts.val * stAVStream.time_base.num / stAVStream.time_base.den;
//(1 / FPS) * sample rate * frame number
if (null == _cFrameVideo)
_cFrameVideo = new Frame(_cFormatVideo, _cFormatVideo.nBufferSize);
Frame[] aFrames = cFormatSource.Convert(_cFormatVideo, cFrameSource, _cFrameVideo);
AVPacket stAVPacket = new AVPacket();
IntPtr pAVPacket;
for (int nIndx = 0; aFrames.Length > nIndx; nIndx++)
{
cFrameSource = aFrames[nIndx];
pAVPacket = Functions.av_malloc((uint)(Marshal.SizeOf(stAVPacket)));
Functions.av_init_packet(pAVPacket);
stAVPacket = (AVPacket)Marshal.PtrToStructure(pAVPacket, typeof(AVPacket));
if (cFrameSource.nPTS != Constants.AV_NOPTS_VALUE)
stAVPacket.pts = Functions.av_rescale_q(cFrameSource.nPTS, _cFormatVideo.stAVCodecContext.time_base, stAVStream.time_base);
if (cFrameSource.bKeyframe)
stAVPacket.flags |= Constants.AV_PKT_FLAG_KEY;
stAVPacket.stream_index = stAVStream.index;
stAVPacket.size = cFrameSource.nLength;
stAVPacket.data = cFrameSource.p;
Marshal.StructureToPtr(stAVPacket, pAVPacket, true);
//System.IO.File.AppendAllText("packets", stAVPacket.pts + "\t" + stAVPacket.size + "\r\n");
_cFormatCtx.PacketWrite(pAVPacket);
Functions.av_free_packet(pAVPacket);
Functions.av_freep(ref pAVPacket);
//cFrameSource.Dispose();
}
}
