f_cnt_t SampleBuffer::decodeSampleSF( const char * _f,
int_sample_t * & _buf,
ch_cnt_t & _channels,
sample_rate_t & _samplerate )
{
SNDFILE * snd_file;
SF_INFO sf_info;
f_cnt_t frames = 0;
bool sf_rr = false;
sample_t * fbuf = 0;
if( ( snd_file = sf_open( _f, SFM_READ, &sf_info ) ) != NULL )
{
frames = sf_info.frames;
// check if float
if ( (sf_info.format & SF_FORMAT_SUBMASK) == SF_FORMAT_FLOAT ) // if yes, use float format for buffer
{
fbuf = new sample_t[sf_info.channels * frames];
sf_rr = sf_read_float( snd_file, fbuf, sf_info.channels * frames );
}
else // otherwise, use int
{
_buf = new int_sample_t[sf_info.channels * frames];
sf_rr = sf_read_short( snd_file, _buf, sf_info.channels * frames );
}
if( sf_rr < sf_info.channels * frames )
{
#ifdef DEBUG_LMMS
printf( "SampleBuffer::decodeSampleSF(): could not read"
" sample %s: %s\n", _f, sf_strerror( NULL ) );
#endif
}
_channels = sf_info.channels;
_samplerate = sf_info.samplerate;
sf_close( snd_file );
}
else
{
#ifdef DEBUG_LMMS
printf( "SampleBuffer::decodeSampleSF(): could not load "
"sample %s: %s\n", _f, sf_strerror( NULL ) );
#endif
}
//write down either directly or convert i->f depending on file type
if ( frames > 0 && fbuf != NULL )
{
directFloatWrite ( fbuf, frames, _channels);
}
else if ( frames > 0 && _buf != NULL )
{
convertIntToFloat ( _buf, frames, _channels);
}
return frames;
}
f_cnt_t SampleBuffer::decodeSampleDS( const char * _f,
int_sample_t * & _buf,
ch_cnt_t & _channels,
sample_rate_t & _samplerate )
{
DrumSynth ds;
f_cnt_t frames = ds.GetDSFileSamples( _f, _buf, _channels, _samplerate );
if ( frames > 0 && _buf != NULL )
{
convertIntToFloat ( _buf, frames, _channels);
}
return frames;
}
f_cnt_t SampleBuffer::decodeSampleOGGVorbis( const char * _f,
int_sample_t * & _buf,
ch_cnt_t & _channels,
sample_rate_t & _samplerate )
{
static ov_callbacks callbacks =
{
qfileReadCallback,
qfileSeekCallback,
qfileCloseCallback,
qfileTellCallback
} ;
OggVorbis_File vf;
f_cnt_t frames = 0;
QFile * f = new QFile( _f );
if( f->open( QFile::ReadOnly ) == false )
{
delete f;
return 0;
}
int err = ov_open_callbacks( f, &vf, NULL, 0, callbacks );
if( err < 0 )
{
switch( err )
{
case OV_EREAD:
printf( "SampleBuffer::decodeSampleOGGVorbis():"
" media read error\n" );
break;
case OV_ENOTVORBIS:
/* printf( "SampleBuffer::decodeSampleOGGVorbis():"
" not an Ogg Vorbis file\n" );*/
break;
case OV_EVERSION:
printf( "SampleBuffer::decodeSampleOGGVorbis():"
" vorbis version mismatch\n" );
break;
case OV_EBADHEADER:
printf( "SampleBuffer::decodeSampleOGGVorbis():"
" invalid Vorbis bitstream header\n" );
break;
case OV_EFAULT:
printf( "SampleBuffer::decodeSampleOgg(): "
"internal logic fault\n" );
break;
}
delete f;
return 0;
}
ov_pcm_seek( &vf, 0 );
_channels = ov_info( &vf, -1 )->channels;
_samplerate = ov_info( &vf, -1 )->rate;
ogg_int64_t total = ov_pcm_total( &vf, -1 );
_buf = new int_sample_t[total * _channels];
int bitstream = 0;
long bytes_read = 0;
do
{
bytes_read = ov_read( &vf, (char *) &_buf[frames * _channels],
( total - frames ) * _channels *
BYTES_PER_INT_SAMPLE,
isLittleEndian() ? 0 : 1,
BYTES_PER_INT_SAMPLE, 1, &bitstream );
if( bytes_read < 0 )
{
break;
}
frames += bytes_read / ( _channels * BYTES_PER_INT_SAMPLE );
}
while( bytes_read != 0 && bitstream == 0 );
ov_clear( &vf );
// if buffer isn't empty, convert it to float and write it down
if ( frames > 0 && _buf != NULL )
{
convertIntToFloat ( _buf, frames, _channels);
}
return frames;
}