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Fix idexing errors in playback ringbuffer stuffing.

This commit is contained in:
Jonathan Moore Liles 2008-05-01 19:42:01 -05:00
parent bdd9dc56e4
commit f17dac7c87
1 changed files with 9 additions and 27 deletions
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36
Timeline/Playback_DS.C
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@ -95,14 +95,12 @@ Playback_DS::disk_thread ( void )
/* buffer to hold the interleaved data returned by the track reader */
sample_t *buf = new sample_t[ _nframes * channels() * _disk_io_blocks ];
// const size_t block_size = _nframes * sizeof( sample_t );
int blocks_ready = 1;
const nframes_t nframes = _nframes * _disk_io_blocks;
while ( wait_for_block() )
{
// printf( "IO: RT thread is ready for more data...\n" );
// printf( "IO: disk buffer is %3d%% full\r", output_buffer_percent() );
// lock(); // for seeking
@ -129,9 +127,6 @@ Playback_DS::disk_thread ( void )
/* reset */
blocks_ready = 1;
const nframes_t nframes = _nframes * _disk_io_blocks;
/* FIXME: should we not read from disk in larger-than-JACK-buffer blocks? */
read_block( buf, nframes );
// unlock(); // for seeking
@ -140,14 +135,6 @@ Playback_DS::disk_thread ( void )
for ( int i = channels(); i--; )
{
/* while ( jack_ringbuffer_write_space( _rb[ i ] ) < block_size ) */
/* { */
/* printf( "IO: disk buffer overrun!\n" ); */
/* /\* FIXME: is this *really* the right thing to do? *\/ */
/* usleep( 2000 ); */
/* } */
/* deinterleave direcectly into the ringbuffer to avoid
* unnecessary copying */
@ -155,37 +142,32 @@ Playback_DS::disk_thread ( void )
jack_ringbuffer_get_write_vector( _rb[ i ], rbd );
if ( rbd[ 0 ].len >= nframes )
const size_t block_size = nframes * sizeof( sample_t );
if ( rbd[ 0 ].len >= block_size )
/* it'll all fit in one go */
buffer_deinterleave_one_channel( (sample_t*)rbd[ 0 ].buf, buf, i, channels(), nframes );
else if ( rbd[ 1 ].len )
else if ( rbd[ 0 ].len + rbd[ 1 ].len >= block_size )
{
/* there's enough space in the ringbuffer, but it's not contiguous */
/* do the first half */
const nframes_t f = rbd[ 0 ].len / sizeof( sample_t );
/* do the first half */
buffer_deinterleave_one_channel( (sample_t*)rbd[ 0 ].buf, buf, i, channels(), f );
assert( rbd[ 1 ].len >= (nframes - f) * sizeof( sample_t ) );
/* do the second half */
buffer_deinterleave_one_channel( (sample_t*)rbd[ 1 ].buf, buf + f, i, channels(), nframes - f );
}
else
{
++_xruns;
printf( "programming error: expected more space in ringbuffer\n" );
}
/* buffer_deinterleave_one_channel( (sample_t*)rbd.buf, buf, i, channels(), _nframes ); */
/* jack_ringbuffer_write( _rb[ i ], (char*)cbuf, block_size ); */
jack_ringbuffer_write_advance( _rb[ i ], nframes * sizeof( sample_t ) );
jack_ringbuffer_write_advance( _rb[ i ], block_size );
}
}