private void Init(Format cFormat)
{
_cGCHandle = GCHandle.Alloc(aBuffer, GCHandleType.Pinned);
_pBytes = _cGCHandle.AddrOfPinnedObject();
if (null == cFormat)
return;
AVFrame cAVFrame;
if (null != aBuffer)
{
int nResult;
if (cFormat is Format.Video)
{
Format.Video cFormatVideo = (Format.Video)cFormat;
//lock (helper._oSyncRootGlobal)
if (0 > (nResult = Functions.avpicture_fill(_pAVFrame, aBuffer, cFormatVideo.ePixelFormat, cFormatVideo.nWidth, cFormatVideo.nHeight)))
throw new Exception("Frame.AVFrameInit.avpicture_fill = " + nResult);
cAVFrame = (AVFrame)Marshal.PtrToStructure(_pAVFrame, typeof(AVFrame));
cAVFrame.quality = 1;
cAVFrame.pts = 0;
Marshal.StructureToPtr(cAVFrame, _pAVFrame, true);
}
else
{
Format.Audio cFormatAudio = (Format.Audio)cFormat;
cAVFrame = (AVFrame)Marshal.PtrToStructure(_pAVFrame, typeof(AVFrame));
if (1 > (cAVFrame.nb_samples = cFormatAudio.stAVCodecContext.frame_size))
cAVFrame.nb_samples = aBuffer.Length / ((cFormatAudio.nBitsPerSample / 8) * cFormatAudio.nChannelsQty);
cAVFrame.channel_layout = cFormatAudio.stAVCodecContext.channel_layout;
cAVFrame.format = (int)cFormatAudio.stAVCodecContext.sample_fmt;
Marshal.StructureToPtr(cAVFrame, _pAVFrame, true);
//lock (helper._oSyncRootGlobal)
if (0 > (nResult = Functions.avcodec_fill_audio_frame(_pAVFrame, cFormatAudio.nChannelsQty, cFormatAudio.eSampleFormat, aBuffer, nLengthBuffer, 1)))
throw new Exception("Frame.AVFrameInit.avcodec_fill_audio_frame = " + nResult);
}
}
}
public Frame(Format cFormat, byte[] aBytes)
: this()
{
_aBuffer = aBytes;
nLength = aBytes.Length;
Init(cFormat);
}
public Frame(Format cFormat)
: this(cFormat, cFormat.nBufferSize)
{ }
public Frame(Format cFormat, int nLength)
: this(cFormat, new byte[nLength])
{ }
public Frame(Format.Audio cFormat, Frame cFrame)
: this()
{
if (null != cFrame._aBuffer)
throw new NotImplementedException();
AVFrame cAVFrame = (AVFrame)Marshal.PtrToStructure(cFrame._pAVFrame, typeof(AVFrame));
if (0 < cAVFrame.width || 0 < cAVFrame.height || 1 > cAVFrame.nb_samples)
throw new NotImplementedException();
int nLineSize = cFormat.nBitsPerSample / 8 * cAVFrame.nb_samples;
//int nReminder = nLineSize % 64;
//if(0 < nReminder)
// nLineSize += 64 - nReminder;
_nLength = cFormat.nChannelsQty * nLineSize;
_aBuffer = new byte[_nLength];
bool bPlanar = (1 < cAVFrame.data.Count(o => NULL != o));
if (!bPlanar)
nLineSize = nLength;
for (int nIndx = 0; cAVFrame.data.Length > nIndx; nIndx++)
{
if (NULL == cAVFrame.data[nIndx])
break;
Marshal.Copy(cAVFrame.data[nIndx], _aBuffer, nIndx * nLineSize, nLineSize);
}
Init(cFormat);
}
