Alsa9Buf::Alsa9Buf( hw hardware, int channels_ ) { GetSoundCardDebugInfo(); InitializeErrorHandler(); channels = channels_; samplerate = 44100; samplebits = 16; last_cursor_pos = 0; samplerate_set_explicitly = false; preferred_writeahead = 8192; preferred_chunksize = 1024; /* Open the device. */ int err; err = dsnd_pcm_open( &pcm, DeviceName(), SND_PCM_STREAM_PLAYBACK, SND_PCM_NONBLOCK ); if (err < 0) RageException::ThrowNonfatal("dsnd_pcm_open(%s): %s", DeviceName().c_str(), dsnd_strerror(err)); if( !SetHWParams() ) { CHECKPOINT; dsnd_pcm_close(pcm); CHECKPOINT; RageException::ThrowNonfatal( "SetHWParams failed" ); } SetSWParams(); }
RString Alsa9Buf::Init( int channels_, int iWriteahead, int iChunkSize, int iSampleRate ) { channels = channels_; preferred_writeahead = iWriteahead; preferred_chunksize = iChunkSize; if( iSampleRate == 0 ) samplerate = 44100; else samplerate = iSampleRate; GetSoundCardDebugInfo(); InitializeErrorHandler(); /* Open the device. */ int err; err = dsnd_pcm_open( &pcm, DeviceName(), SND_PCM_STREAM_PLAYBACK, SND_PCM_NONBLOCK ); if( err < 0 ) return ssprintf( "dsnd_pcm_open(%s): %s", DeviceName().c_str(), dsnd_strerror(err) ); if( !SetHWParams() ) { CHECKPOINT; return "SetHWParams failed"; } SetSWParams(); LOG->Info( "ALSA: Mixing at %ihz", samplerate ); if( preferred_writeahead != writeahead ) LOG->Info( "ALSA: writeahead adjusted from %u to %u", (unsigned) preferred_writeahead, (unsigned) writeahead ); if( preferred_chunksize != chunksize ) LOG->Info( "ALSA: chunksize adjusted from %u to %u", (unsigned) preferred_chunksize, (unsigned) chunksize ); return ""; }