non/Timeline/Disk_Stream.H

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/*******************************************************************************/
/* Copyright (C) 2008 Jonathan Moore Liles */
/* */
/* This program is free software; you can redistribute it and/or modify it */
/* under the terms of the GNU General Public License as published by the */
/* Free Software Foundation; either version 2 of the License, or (at your */
/* option) any later version. */
/* */
/* This program is distributed in the hope that it will be useful, but WITHOUT */
/* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or */
/* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for */
/* more details. */
/* */
/* You should have received a copy of the GNU General Public License along */
/* with This program; see the file COPYING. If not,write to the Free Software */
/* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
/*******************************************************************************/
#pragma once
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#include "Port.H" // for nframes_t
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#include <jack/ringbuffer.h>
#include <semaphore.h>
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#include <errno.h>
#include <pthread.h>
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#include "Mutex.H"
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#include <vector>
using std::vector;
class Track_Header;
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class Audio_Track;
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class Disk_Stream : public Mutex
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{
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pthread_t _thread;
Track_Header *_th; /* Track_Header we whould be playing */
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nframes_t _nframes;
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nframes_t _frame;
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vector <jack_ringbuffer_t *> _rb;
// jack_ringbuffer_t *_rb; /* One interleaved ringbuffer for all channels */
sem_t _blocks; /* semaphore to wake the IO thread with */
int _total_blocks;
volatile nframes_t _pending_seek; /* absolute transport position to seek to */
volatile int _terminate;
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int channels ( void ) const { return _rb.size(); }
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Audio_Track * track ( void );
static void *io_thread ( void *arg );
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protected:
void block_processed ( void ) { sem_post( &_blocks ); }
bool wait_for_block ( void )
{
if ( _terminate )
return false;
else
{
while ( sem_wait( &_blocks ) == EINTR );
return true;
}
}
void read_block ( sample_t *buf, nframes_t nframes );
void io_thread ( void );
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public:
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/* must be set before any Disk_Streams are created */
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static float seconds_to_buffer;
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Disk_Stream ( Track_Header *th, float frame_rate, nframes_t nframes, int channels );
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virtual ~Disk_Stream ( );
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void resize ( nframes_t nframes );
void seek ( nframes_t frame );
bool seek_pending ( void );
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void run ( void );
nframes_t process ( nframes_t nframes );
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int output_buffer_percent ( void );
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};