actions/itgmania212121
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

buffer size, chunk size cleanup

Browse Source 
use poll()
many systems (even 2.4) can now handle much smaller writeaheads with
software mixing
This commit is contained in:
Glenn Maynard
2004-05-08 03:02:25 +00:00
parent fe9c19b446
commit bed5872199
6 changed files with 76 additions and 48 deletions
Download Patch File Download Diff File Expand all files Collapse all files
stepmania/src/arch/Sound/RageSoundDriver_ALSA9_Software.cpp
+5 -11
View File
@@ -41,28 +41,19 @@ void RageSound_ALSA9_Software::MixerThread()
setpriority( PRIO_PROCESS, 0, -15 );
// RageTimer UnderrunTest;
while(!shutdown)
{
while( !shutdown && GetData() )
;
const float delay_ms = 1000 * float(max_writeahead) / samplerate;
SDL_Delay( int(delay_ms) / 4 );
// if( UnderrunTest.PeekDeltaTime() > 10 )
// {
// UnderrunTest.GetDeltaTime();
// SDL_Delay( 250 );
// }
pcm->WaitUntilFramesCanBeFilled( 100 );
}
}
/* Returns the number of frames processed */
bool RageSound_ALSA9_Software::GetData()
{
const int chunksize = max_writeahead / num_chunks;
const int frames_to_fill = pcm->GetNumFramesToFill( max_writeahead, chunksize );
const int frames_to_fill = pcm->GetNumFramesToFill();
if( frames_to_fill <= 0 )
return false;
@@ -116,6 +107,9 @@ try {
pcm->SetSampleRate( samplerate );
LOG->Info( "ALSA: Software mixing at %ihz", samplerate );
pcm->SetWriteahead( max_writeahead );
pcm->SetChunksize( max_writeahead / num_chunks );
StartDecodeThread();
MixingThread.SetName( "RageSound_ALSA9_Software" );