92 lines
3.0 KiB
C++
92 lines
3.0 KiB
C++
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/*******************************************************************************/
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/* Copyright (C) 2008 Jonathan Moore Liles */
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/* */
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/* This program is free software; you can redistribute it and/or modify it */
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/* under the terms of the GNU General Public License as published by the */
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/* Free Software Foundation; either version 2 of the License, or (at your */
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/* option) any later version. */
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/* */
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/* This program is distributed in the hope that it will be useful, but WITHOUT */
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/* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or */
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/* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for */
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/* more details. */
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/* */
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/* You should have received a copy of the GNU General Public License along */
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/* with This program; see the file COPYING. If not,write to the Free Software */
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/* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
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/*******************************************************************************/
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#pragma once
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#include <jack/ringbuffer.h>
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#include <semaphore.h>
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class Disk_Stream
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{
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const Track_Header *_th; /* Track_Header we whould be playing */
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nframes_t _nframes;
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vector <jack_ringbuffer_t *> _rb;
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// jack_ringbuffer_t *_rb; /* One interleaved ringbuffer for all channels */
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sem_t _blocks; /* semaphore to wake the IO thread with */
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int channels ( void ) const { return _rb.size(); }
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protected:
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void block_processed ( void ) { sem_post( &_blocks ); }
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bool wait_for_block ( void ) { while ( sem_wait( &_work ) == EINTR ); return true; }
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public:
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static float seconds_to_buffer;
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Disk_Stream ( const Track_Header *th, float frame_rate, nframes_t nframes, int channels ) : _th( th )
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{
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_frame = 0;
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const int blocks = frame_rate * seconds_to_buffer / nframes;
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_nframes = nframes;
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size_t bufsize = blocks * nframes * sizeof( sample_t );
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for ( int i = channels(); i-- )
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_rb[ i ] = jack_ringbuffer_create( bufsize );
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sem_init( &_blocks, 0, blocks );
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run();
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}
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virtual ~Disk_Stream ( )
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{
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_th = NULL;
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sem_destroy( &_blocks );
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for ( int i = channels(); i-- )
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jack_ringbuffer_free( _rb[ i ] );
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}
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void
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resize_buffer ( void )
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{
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}
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void
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seek ( nframes_t frame )
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{
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_frame = frame;
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}
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void run ( void );
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};
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