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 "";
}
RString Alsa9Buf::GetHardwareID( RString name )
{
InitializeErrorHandler();
if( name.empty() )
name = DeviceName();
snd_ctl_t *handle;
int err;
err = dsnd_ctl_open( &handle, name, 0 );
if ( err < 0 )
{
LOG->Info( "Couldn't open card \"%s\" to get ID: %s", name.c_str(), dsnd_strerror(err) );
return "???";
}
snd_ctl_card_info_t *info;
dsnd_ctl_card_info_alloca(&info);
err = dsnd_ctl_card_info( handle, info );
RString ret = dsnd_ctl_card_info_get_id( info );
dsnd_ctl_close(handle);
return ret;
}
void Alsa9Buf::GetSoundCardDebugInfo()
{
static bool done = false;
if( done )
return;
done = true;
if( DoesFileExist("/rootfs/proc/asound/version") )
{
RString sVersion;
GetFileContents( "/rootfs/proc/asound/version", sVersion, true );
LOG->Info( "ALSA: %s", sVersion.c_str() );
}
InitializeErrorHandler();
int card = -1;
while( dsnd_card_next( &card ) >= 0 && card >= 0 )
{
const RString id = ssprintf( "hw:%d", card );
snd_ctl_t *handle;
int err;
err = dsnd_ctl_open( &handle, id, 0 );
if ( err < 0 )
{
LOG->Info( "Couldn't open card #%i (\"%s\") to probe: %s", card, id.c_str(), dsnd_strerror(err) );
continue;
}
snd_ctl_card_info_t *info;
dsnd_ctl_card_info_alloca(&info);
err = dsnd_ctl_card_info( handle, info );
if ( err < 0 )
{
LOG->Info( "Couldn't get card info for card #%i (\"%s\"): %s", card, id.c_str(), dsnd_strerror(err) );
dsnd_ctl_close( handle );
continue;
}
int dev = -1;
while ( dsnd_ctl_pcm_next_device( handle, &dev ) >= 0 && dev >= 0 )
{
snd_pcm_info_t *pcminfo;
dsnd_pcm_info_alloca(&pcminfo);
dsnd_pcm_info_set_device(pcminfo, dev);
dsnd_pcm_info_set_stream(pcminfo, SND_PCM_STREAM_PLAYBACK);
err = dsnd_ctl_pcm_info(handle, pcminfo);
if ( err < 0 )
{
if (err != -ENOENT)
LOG->Info("dsnd_ctl_pcm_info(%i) (%s) failed: %s", card, id.c_str(), dsnd_strerror(err));
continue;
}
LOG->Info( "ALSA Driver: %i: %s [%s], device %i: %s [%s], %i/%i subdevices avail",
card, dsnd_ctl_card_info_get_name(info), dsnd_ctl_card_info_get_id(info), dev,
dsnd_pcm_info_get_id(pcminfo), dsnd_pcm_info_get_name(pcminfo),
dsnd_pcm_info_get_subdevices_avail(pcminfo),
dsnd_pcm_info_get_subdevices_count(pcminfo) );
}
dsnd_ctl_close(handle);
}
if( card == 0 )
LOG->Info( "No ALSA sound cards were found.");
if( !PREFSMAN->m_iSoundDevice.Get().empty() )
LOG->Info( "ALSA device overridden to \"%s\"", PREFSMAN->m_iSoundDevice.Get().c_str() );
}
