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Buffer AVI audio samples for more efficient packing into file chunks.

This commit is contained in:
mjbudd77 2021-10-01 16:28:33 -04:00
parent 52194fdf3d
commit 7717e699cd
1 changed files with 55 additions and 4 deletions
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59
src/drivers/Qt/AviRecord.cpp
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@ -2167,7 +2167,7 @@ int aviRecordOpenFile( const char *filepath )
vbufSize = 1024 * 1024 * 60;
rawVideoBuf = (uint32_t*)malloc( vbufSize * sizeof(uint32_t) );
abufSize = 48000;
abufSize = 96000;
rawAudioBuf = (int16_t*)malloc( abufSize * sizeof(uint16_t) );
vbufHead = 0;
@ -2450,7 +2450,8 @@ void AviRecordDiskThread_t::run(void)
uint32_t *videoOut;
char writeAudio = 1;
char localRecordAudio = 0;
int avgAudioPerFrame, localVideoFormat;
int avgAudioPerFrame, audioChunkSize, audioSamplesAvail=0;
int localVideoFormat;
fprintf( avLogFp, "AVI Record Disk Thread Start\n");
@ -2459,6 +2460,7 @@ void AviRecordDiskThread_t::run(void)
fps = getBaseFrameRate();
avgAudioPerFrame = ( audioSampleRate / fps) + 1;
audioChunkSize = ( audioSampleRate / 4 );
fprintf( avLogFp, "Avg Audio Sample Rate per Frame: %i \n", avgAudioPerFrame );
@ -2514,9 +2516,10 @@ void AviRecordDiskThread_t::run(void)
}
#endif
audioOut = (int16_t *)malloc(48000);
audioOut = (int16_t *)malloc(96000);
videoOut = (uint32_t*)malloc(1048576);
// Main Disk Record Loop
while ( !isInterruptionRequested() )
{
@ -2578,6 +2581,14 @@ void AviRecordDiskThread_t::run(void)
numPixelsReady = 0;
audioSamplesAvail = abufHead - abufTail;
if ( audioSamplesAvail < 0 )
{
audioSamplesAvail += abufSize;
}
writeAudio = (audioSamplesAvail >= audioChunkSize);
if ( writeAudio && localRecordAudio )
{
numSamples = 0;
@ -2588,7 +2599,7 @@ void AviRecordDiskThread_t::run(void)
abufTail = (abufTail + 1) % abufSize;
if ( numSamples > avgAudioPerFrame )
if ( numSamples >= audioChunkSize )
{
break;
}
@ -2618,6 +2629,46 @@ void AviRecordDiskThread_t::run(void)
}
}
// Write Leftover Audio Samples
audioSamplesAvail = abufHead - abufTail;
if ( audioSamplesAvail < 0 )
{
audioSamplesAvail += abufSize;
}
writeAudio = (audioSamplesAvail > 0);
if ( writeAudio && localRecordAudio )
{
//printf("Writing Last %i Audio Samples\n", audioSamplesAvail );
numSamples = 0;
while ( abufHead != abufTail )
{
audioOut[ numSamples ] = rawAudioBuf[ abufTail ]; numSamples++;
abufTail = (abufTail + 1) % abufSize;
}
if ( numSamples > 0 )
{
//printf("NUM Audio Samples: %i \n", numSamples );
#ifdef _USE_LIBAV
if ( localVideoFormat == AVI_LIBAV)
{
LIBAV::encode_audio_frame( audioOut, numSamples );
}
else
#endif
{
gwavi->add_audio( (unsigned char *)audioOut, numSamples*2);
}
numSamples = 0;
}
}
// Start of Disk Thread Cleanup
free(rgb24);
#ifdef _USE_X264