void AudioOss::run()
{
surroundSampleFrame * temp =
new surroundSampleFrame[mixer()->framesPerPeriod()];
int_sample_t * outbuf =
new int_sample_t[mixer()->framesPerPeriod() *
channels()];
while( true )
{
const fpp_t frames = getNextBuffer( temp );
if( !frames )
{
break;
}
int bytes = convertToS16( temp, frames,
mixer()->masterGain(), outbuf,
m_convertEndian );
if( write( m_audioFD, outbuf, bytes ) != bytes )
{
break;
}
}
delete[] temp;
delete[] outbuf;
}
void AudioSndio::run( void )
{
surroundSampleFrame * temp =
new surroundSampleFrame[mixer()->framesPerPeriod()];
int_sample_t * outbuf =
new int_sample_t[mixer()->framesPerPeriod() * channels()];
while( TRUE )
{
const fpp_t frames = getNextBuffer( temp );
if( !frames )
{
break;
}
uint bytes = convertToS16( temp, frames,
mixer()->masterGain(), outbuf, FALSE );
if( sio_write( m_hdl, outbuf, bytes ) != bytes )
{
break;
}
}
delete[] temp;
delete[] outbuf;
}
void AudioSdl::sdlAudioCallback( Uint8 * _buf, int _len )
{
if( m_stopped )
{
memset( _buf, 0, _len );
return;
}
while( _len )
{
if( m_convertedBufPos == 0 )
{
// frames depend on the sample rate
const fpp_t frames = getNextBuffer( m_outBuf );
if( !frames )
{
m_stopped = true;
m_stopSemaphore.release();
memset( _buf, 0, _len );
return;
}
m_convertedBufSize = frames * channels()
* sizeof( int_sample_t );
convertToS16( m_outBuf, frames,
mixer()->masterGain(),
(int_sample_t *)m_convertedBuf,
m_convertEndian );
}
const int min_len = qMin( _len, m_convertedBufSize
- m_convertedBufPos );
memcpy( _buf, m_convertedBuf + m_convertedBufPos, min_len );
_buf += min_len;
_len -= min_len;
m_convertedBufPos += min_len;
m_convertedBufPos %= m_convertedBufSize;
}
}
void AudioAlsa::run()
{
surroundSampleFrame * temp =
new surroundSampleFrame[mixer()->framesPerPeriod()];
int_sample_t * outbuf =
new int_sample_t[mixer()->framesPerPeriod() *
channels()];
int_sample_t * pcmbuf = new int_sample_t[m_periodSize * channels()];
int outbuf_size = mixer()->framesPerPeriod() * channels();
int outbuf_pos = 0;
int pcmbuf_size = m_periodSize * channels();
bool quit = false;
while( quit == false )
{
int_sample_t * ptr = pcmbuf;
int len = pcmbuf_size;
while( len )
{
if( outbuf_pos == 0 )
{
// frames depend on the sample rate
const fpp_t frames = getNextBuffer( temp );
if( !frames )
{
quit = true;
memset( ptr, 0, len
* sizeof( int_sample_t ) );
break;
}
outbuf_size = frames * channels();
convertToS16( temp, frames,
mixer()->masterGain(),
outbuf,
m_convertEndian );
}
int min_len = qMin( len, outbuf_size - outbuf_pos );
memcpy( ptr, outbuf + outbuf_pos,
min_len * sizeof( int_sample_t ) );
ptr += min_len;
len -= min_len;
outbuf_pos += min_len;
outbuf_pos %= outbuf_size;
}
f_cnt_t frames = m_periodSize;
ptr = pcmbuf;
while( frames )
{
int err = snd_pcm_writei( m_handle, ptr, frames );
if( err == -EAGAIN )
{
continue;
}
if( err < 0 )
{
if( handleError( err ) < 0 )
{
printf( "Write error: %s\n",
snd_strerror( err ) );
}
break; // skip this buffer
}
ptr += err * channels();
frames -= err;
}
}
delete[] temp;
delete[] outbuf;
delete[] pcmbuf;
}
