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| bool CopyAudioStream(PAVISTREAM & audioStream)
{
// the new audio stream
PAVISTREAM newstream;
// to get infos on the audio stream to copy
AVISTREAMINFO avi_stream_info;
// get infos about the audio stream to copy
if(AVIStreamInfo(audioStream, &avi_stream_info, sizeof(AVISTREAMINFO)))
{
ShowMessage("Error with AVIStreamInfo");
}
// get the first sample number
int audioSrcStreamStart = AVIStreamStart(audioStream);
// get the last sample number
int audioSrcStreamStop = AVIStreamEnd(audioStream);
// to memorize the wave infos of the audio stream to copy
WAVEFORMATEX wave;
LONG lStreamSize;
// get the size of the WAVEFORMATEX
if(AVIStreamReadFormat(audioStream, audioSrcStreamStart, NULL, &lStreamSize))
{
ShowMessage("Error with AVIStreamReadFormat (0)");
}
// get the wave infos of the audio stream to copy
if(AVIStreamReadFormat(audioStream, audioSrcStreamStart, &wave, &lStreamSize))
{
ShowMessage("Error with AVIStreamReadFormat (1)");
}
// create the new audio stream int the PAVIFILE avi
if(AVIFileCreateStream(this->avi, &newstream, &avi_stream_info))
{
ShowMessage("Error with AVIFileCreateStream");
}
// set the same wave format than the audio stream to copy
if(AVIStreamSetFormat(newstream, 0, &wave, sizeof(wave)))
{
ShowMessage("Error with AVIStreamSetFormat");
}
//Copie byte par byte
for(int i = audioSrcStreamStart; i < audioSrcStreamStop; i++)
{
long numberOfBytesReaden = 0;
// get the size (in bytes) of the next sample to copy
if(AVIStreamRead(audioStream, i, 1, NULL, 0, &numberOfBytesReaden, 0))
{
ShowMessage("Error with AVIStreamRead (0)");
}
// create the frame to receive the frame bytes from the audio stream to copy
unsigned char * frame = new unsigned char[numberOfBytesReaden];
// save the current audio stream sample to the buffer frame
if(AVIStreamRead(audioStream, i, 1, frame, numberOfBytesReaden, 0, 0))
{
ShowMessage("Error with AVIStreamRead (1)");
}
// verification if the current sample is a key frame
if(AVIStreamIsKeyFrame(audioStream, i))
{
// write it in the audio stream destination as a key frame
if(AVIStreamWrite(newstream, i - audioSrcStreamStart, 1, frame, numberOfBytesReaden, AVIIF_KEYFRAME, 0, 0))
{
ShowMessage("Error with AVIStreamWrite (0)");
}
}
// else write it in the audio stream destination as a basic frame
else if(AVIStreamWrite(newstream, i - audioSrcStreamStart, 1, frame, numberOfBytesReaden, AVIIF_KEYFRAME, 0, 0))
{
ShowMessage("Error with AVIStreamWrite (1)");
}
// delete the buffer
delete [] frame;
}
// release the created audio stream
AVIStreamRelease(newstream);
} |
