private void FrameDecodeAudio()
{
(new Logger()).WriteDebug4("in");
if (null == _cFormatAudioTarget)
throw new NotImplementedException("null == cFormatTarget"); //UNDONE нужно доделать возвращение сырых пакетов
Logger.Timings cTimings = new Logger.Timings("ffmpeg:file");
bool bFrameDecoded = false;
Frame cSamplesTarget = null;
Frame cFrame;
if (1 > _aqAudioFramesFree.Count) //ротация кадров
{
cFrame = new Frame(_cFormatAudioTarget);
cFrame.Disposing += cFrameAudio_Disposing;
(new Logger()).WriteDebug3("audio frame added. total:" + nFramesQueueAudio++);
}
else
lock (_aqAudioFramesFree)
cFrame = _aqAudioFramesFree.Dequeue();
int nBytesCapacity = 0;
int nBytesOffset = 0;
byte[] aPacketBytes;
int nLength = 0;
AVPacket stPacket;
if (null != _aBytesRemainder)
{
if (_aBytesRemainder.Length > cFrame.aBuffer.Length)
{
//(new Logger()).WriteWarning("_aBytesRemainder.Length > cFrame.aBuffer.Length : " + _aBytesRemainder.Length + ":" + cFrame.aBuffer.Length);
Array.Copy(_aBytesRemainder, 0, cFrame.aBuffer, 0, cFrame.aBuffer.Length);
_aBytesRemainder = _aBytesRemainder.Skip(cFrame.aBuffer.Length).Take(_aBytesRemainder.Length - cFrame.aBuffer.Length).ToArray();
nBytesOffset += cFrame.aBuffer.Length;
}
else
{
Array.Copy(_aBytesRemainder, 0, cFrame.aBuffer, 0, _aBytesRemainder.Length);
nBytesOffset += _aBytesRemainder.Length;
_aBytesRemainder = null;
}
}
while (cFrame.nLength > nBytesOffset)
{
aPacketBytes = null;
if (NULL == _pPacketAudioDub)
{
_pPacketAudioDub = Functions.av_malloc(Marshal.SizeOf(typeof(AVPacket)));
helpers.WinAPI.memset(_pPacketAudioDub, 0, Marshal.SizeOf(typeof(AVPacket)));
Functions.av_init_packet(_pPacketAudioDub);
_stPacketAudio = (AVPacket)Marshal.PtrToStructure(_pPacketAudioDub, typeof(AVPacket));
}
cTimings.Restart("allocation");
while (true)
{
// NOTE: the audio packet can contain several frames
while (_stPacketAudio.size > 0)
{
if (null == _cFrameAudio)
_cFrameAudio = new Frame();
Marshal.StructureToPtr(_stPacketAudio, _pPacketAudioDub, true);
nLength = Functions.avcodec_decode_audio4(_cFormatAudio.pAVCodecContext, _cFrameAudio, ref bFrameDecoded, _pPacketAudioDub);
cTimings.CheckIn("decode");
if (nLength < 0)
{
_stPacketAudio.size = 0;
break;
}
_stPacketAudio.data += nLength;
_stPacketAudio.size -= nLength;
if (!bFrameDecoded)
continue;
cTimings.Restart("frame");
cSamplesTarget = _cFormatAudio.Transform(_cFormatAudioTarget, new Frame(_cFormatAudio, _cFrameAudio));
//cSamplesTarget = new Frame(_cFormatAudio);
//aPacketBytes = cSamplesTarget.aBytes;
//cSamplesTarget.Dispose();
aPacketBytes = cSamplesTarget.aBytes;
cTimings.Restart("transform");
break;
}
if (null != aPacketBytes)
break;
if (NULL != _pPacketAudio)
{
Functions.av_free_packet(_pPacketAudio);
Functions.av_freep(ref _pPacketAudio);
cTimings.Restart("packet free");
}
while (!_bFileEnd && 1 > _aqAudioPackets.Count)
{
lock (_oSyncRoot)
PacketNext();
}
if (_bFileEnd && 1 > _aqAudioPackets.Count)
break;
lock (_oSyncRoot)
_pPacketAudio = _aqAudioPackets.Dequeue();
stPacket = (AVPacket)Marshal.PtrToStructure(_pPacketAudio, typeof(AVPacket));
_stPacketAudio.data = stPacket.data;
_stPacketAudio.size = stPacket.size;
cTimings.Restart("packets");
}
if (null == aPacketBytes)
throw new Exception("audio packet is null");
nBytesCapacity = aPacketBytes.Length;
if (cFrame.nLength < nBytesOffset + nBytesCapacity)
{
nBytesCapacity = cFrame.nLength - nBytesOffset;
_aBytesRemainder = new byte[aPacketBytes.Length - nBytesCapacity];
Array.Copy(aPacketBytes, nBytesCapacity, _aBytesRemainder, 0, _aBytesRemainder.Length);
}
Array.Copy(aPacketBytes, 0, cFrame.aBuffer, nBytesOffset, nBytesCapacity);
nBytesOffset += nBytesCapacity;
cTimings.Restart("accumulation");
}
cTimings.Stop("frame:decode:audio: >40ms", 40);//FPS
lock (_aqAudioFrames)
_aqAudioFrames.Enqueue(cFrame);
(new Logger()).WriteDebug4("return");
}
public Frame FrameNextAudioGet()
{
(new Logger()).WriteDebug4("in");
if (null == _aqAudioFrames)
return null;
Frame cRetVal = null;
Logger.Timings cTimings = new Logger.Timings("ffmpeg:file");
if (!_bFileEnd)
{
DateTime dtTimedOut = DateTime.MaxValue;
while (!_bFileEnd && 1 > _aqAudioFrames.Count)
{
if (bFileEndless)
return null;
if (DateTime.MaxValue == dtTimedOut)
{
try
{
dtTimedOut = DateTime.Now.Add(tsTimeout);
}
catch
{
dtTimedOut = DateTime.MaxValue.AddTicks(-1);
}
(new Logger()).WriteDebug("frame:next:audio: queue is empty"); //logging
}
System.Threading.Thread.Sleep(5);
if (DateTime.Now > dtTimedOut)
throw new TimeoutException("audio queue is empty");
}
}
cTimings.Restart("frame waiting");
lock (_aqAudioFrames)
{
if (0 < _aqAudioFrames.Count)
cRetVal = _aqAudioFrames.Dequeue();
cTimings.CheckIn("dequeue"); // logging
}
cTimings.Stop("frame:next:audio: >20ms", 20);
(new Logger()).WriteDebug4("return");
return cRetVal;
}
