/** This returns a list of descriptors of calls to external DSO functions that
* implement a named shadeop, entries are returned for each polymorphic function
*/
std::list<SqDSOExternalCall*>*
CqDSORepository::getShadeOpMethods(CqString* pShadeOpName)
{
CqString strTableSymbol = *pShadeOpName + "_shadeops" ;
std::list<SqDSOExternalCall*>* oplist = new (std::list<SqDSOExternalCall*>);
std::list<CqString>::iterator itPathEntry;
SqShadeOp *pTableSymbol = NULL;
Aqsis::log() << debug << "Looking for DSO candidates for shadeop \"" << pShadeOpName->c_str() << "\"" << std::endl;
for ( itPathEntry = m_DSOPathList.begin() ; itPathEntry != m_DSOPathList.end() ; itPathEntry++ )
{
Aqsis::log() << debug << "Looking in shared library : " << itPathEntry->c_str() << std::endl;
void *handle = DLOpen( &(*itPathEntry) );
if( handle != NULL )
{
pTableSymbol = (SqShadeOp*) DLSym( handle, &strTableSymbol );
if ( pTableSymbol != NULL )
{
//We have an appropriate named shadeop table
SqShadeOp *pShadeOp = (SqShadeOp*) pTableSymbol;
while( ( pShadeOp->m_opspec )[0] != (char) NULL )
{
SqDSOExternalCall *pDSOCall = NULL;
pDSOCall = parseShadeOpTableEntry( handle, pShadeOp );
if ( pDSOCall != NULL )
oplist->push_back( pDSOCall );
pShadeOp++;
};
};
// Failure here does not neccesarily mean anything since
}
else
{
CqString strError = DLError();
Aqsis::log() << error << "DLOpen: " << strError.c_str() << std::endl;
};
};
std::stringstream resultStr;
if(oplist->empty())
resultStr << "(none found)";
else
resultStr << "(found " << oplist->size() << " possibilities)";
Aqsis::log() << debug << "Finished looking for DSO candidates "<< resultStr.str().c_str() << std::endl;
return ( oplist->empty() ? NULL : oplist );
};
/*
=====================
idAudioHardwareALSA::Initialize
=====================
*/
bool idAudioHardwareALSA::Initialize( void ) {
int err;
common->Printf( "------ Alsa Sound Initialization -----\n" );
if ( !DLOpen() ) {
InitFailed();
return false;
}
if ( ( err = id_snd_pcm_open( &m_pcm_handle, s_alsa_pcm.GetString(), SND_PCM_STREAM_PLAYBACK, SND_PCM_NONBLOCK ) ) < 0 ) {
common->Printf( "snd_pcm_open SND_PCM_STREAM_PLAYBACK '%s' failed: %s\n", s_alsa_pcm.GetString(), id_snd_strerror( err ) );
InitFailed();
return false;
}
common->Printf( "opened Alsa PCM device %s for playback\n", s_alsa_pcm.GetString() );
// set hardware parameters ----------------------------------------------------------------------
// init hwparams with the full configuration space
snd_pcm_hw_params_t *hwparams;
// this one is a define
id_snd_pcm_hw_params_alloca( &hwparams );
if ( ( err = id_snd_pcm_hw_params_any( m_pcm_handle, hwparams ) ) < 0 ) {
common->Printf( "cannot configure the PCM device: %s\n", id_snd_strerror( err ) );
InitFailed();
return false;
}
if ( ( err = id_snd_pcm_hw_params_set_access( m_pcm_handle, hwparams, SND_PCM_ACCESS_RW_INTERLEAVED ) ) < 0 ) {
common->Printf( "SND_PCM_ACCESS_RW_INTERLEAVED failed: %s\n", id_snd_strerror( err ) );
InitFailed();
return false;
}
if ( ( err = id_snd_pcm_hw_params_set_format( m_pcm_handle, hwparams, SND_PCM_FORMAT_S16_LE ) ) < 0 ) {
common->Printf( "SND_PCM_FORMAT_S16_LE failed: %s\n", id_snd_strerror( err ) );
InitFailed();
return false;
}
// channels
// sanity over number of speakers
if ( idSoundSystemLocal::s_numberOfSpeakers.GetInteger() != 6 && idSoundSystemLocal::s_numberOfSpeakers.GetInteger() != 2 ) {
common->Warning( "invalid value for s_numberOfSpeakers. Use either 2 or 6" );
idSoundSystemLocal::s_numberOfSpeakers.SetInteger( 2 );
}
m_channels = idSoundSystemLocal::s_numberOfSpeakers.GetInteger();
if ( ( err = id_snd_pcm_hw_params_set_channels( m_pcm_handle, hwparams, m_channels ) ) < 0 ) {
common->Printf( "error setting %d channels: %s\n", m_channels, id_snd_strerror( err ) );
if ( idSoundSystemLocal::s_numberOfSpeakers.GetInteger() != 2 ) {
// fallback to stereo if that works
m_channels = 2;
if ( ( err = id_snd_pcm_hw_params_set_channels( m_pcm_handle, hwparams, m_channels ) ) < 0 ) {
common->Printf( "fallback to stereo failed: %s\n", id_snd_strerror( err ) );
InitFailed();
return false;
} else {
common->Printf( "fallback to stereo\n" );
idSoundSystemLocal::s_numberOfSpeakers.SetInteger( 2 );
}
} else {
InitFailed();
return false;
}
}
// set sample rate (frequency)
if ( ( err = id_snd_pcm_hw_params_set_rate( m_pcm_handle, hwparams, PRIMARYFREQ, 0 ) ) < 0 ) {
common->Printf( "failed to set 44.1KHz rate: %s - try ( +set s_alsa_pcm plughw:0 ? )\n", id_snd_strerror( err ) );
InitFailed();
return false;
}
// have enough space in the input buffer for our MIXBUFFER_SAMPLE feedings and async ticks
snd_pcm_uframes_t frames;
frames = MIXBUFFER_SAMPLES + MIXBUFFER_SAMPLES / 3;
if ( ( err = id_snd_pcm_hw_params_set_buffer_size_min( m_pcm_handle, hwparams, &frames ) ) < 0 ) {
common->Printf( "buffer size select failed: %s\n", id_snd_strerror( err ) );
InitFailed();
return false;
}
// apply parameters
if ( ( err = id_snd_pcm_hw_params( m_pcm_handle, hwparams ) ) < 0 ) {
common->Printf( "snd_pcm_hw_params failed: %s\n", id_snd_strerror( err ) );
InitFailed();
return false;
}
// check the buffer size
if ( ( err = id_snd_pcm_hw_params_get_buffer_size( hwparams, &frames ) ) < 0 ) {
common->Printf( "snd_pcm_hw_params_get_buffer_size failed: %s\n", id_snd_strerror( err ) );
} else {
common->Printf( "device buffer size: %lu frames ( %lu bytes )\n", ( long unsigned int )frames, frames * m_channels * 2 );
}
// TODO: can use swparams to setup the device so it doesn't underrun but rather loops over
// snd_pcm_sw_params_set_stop_threshold
// To get alsa to just loop on underruns. set the swparam stop_threshold to equal buffer size. The sound buffer will just loop and never throw an xrun.
// allocate the final mix buffer
m_buffer_size = MIXBUFFER_SAMPLES * m_channels * 2;
m_buffer = malloc( m_buffer_size );
common->Printf( "allocated a mix buffer of %d bytes\n", m_buffer_size );
#ifdef _DEBUG
// verbose the state
snd_pcm_state_t curstate = id_snd_pcm_state( m_pcm_handle );
assert( curstate == SND_PCM_STATE_PREPARED );
#endif
common->Printf( "--------------------------------------\n" );
return true;
}