75 lines
2.9 KiB
C++
75 lines
2.9 KiB
C++
|
|
/*******************************************************************************/
|
|
/* 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
|
|
|
|
#include "Mutex.H"
|
|
|
|
#include <jack/jack.h>
|
|
|
|
typedef jack_nframes_t nframes_t;
|
|
|
|
class Port;
|
|
|
|
class Engine : public Mutex
|
|
{
|
|
jack_client_t *_client;
|
|
|
|
/* I know locking out the process callback is cheating, even
|
|
though we use trylock... The thing is, every other DAW does
|
|
this too and you can hear it in the glitches Ardour and friends
|
|
produce when reconfiguring I/O... Working out a message queue
|
|
system would obviously be better, but a DAW isn't a performance
|
|
instrument anyway, so I think these drop-outs are a reasonable
|
|
compromise. Obviously, this lock should never be held during
|
|
blocking operations. */
|
|
|
|
int _buffers_dropped; /* buffers dropped because of locking */
|
|
|
|
static int process ( nframes_t nframes, void *arg );
|
|
int process ( nframes_t nframes );
|
|
static int sync ( jack_transport_state_t state, jack_position_t *pos, void *arg );
|
|
int sync ( jack_transport_state_t state, jack_position_t *pos );
|
|
|
|
private:
|
|
|
|
friend class Port;
|
|
friend class Transport;
|
|
jack_client_t * client ( void ) { return _client; }
|
|
|
|
nframes_t _sample_rate;
|
|
|
|
public:
|
|
|
|
Engine ( );
|
|
|
|
int init ( void );
|
|
|
|
void request_locate ( nframes_t frame );
|
|
|
|
nframes_t nframes ( void ) const { return jack_get_buffer_size( _client ); }
|
|
float frame_rate ( void ) const { return jack_get_sample_rate( _client ); }
|
|
nframes_t sample_rate ( void ) const { return _sample_rate; }
|
|
|
|
float cpu_load ( void ) const { return jack_cpu_load( _client ); }
|
|
};
|
|
|
|
|
|
extern Engine * engine;
|