148 lines
3.9 KiB
C
148 lines
3.9 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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#include "Engine.H"
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#include "../Mixer.H" // for process()
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/* This is the home of the JACK process callback */
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// #include "const.h"
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#include "debug.h"
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#include "Thread.H"
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Engine::Engine ( void (*process_callback)(nframes_t nframes, void *), void *user_data ) : _thread( "RT" )
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{
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_process_callback = process_callback;
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_process_callback_user_data = user_data;
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_buffer_size_callback = 0;
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_buffers_dropped = 0;
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_port_connect_callback = 0;
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}
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Engine::~Engine ( )
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{
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deactivate();
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}
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void
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Engine::buffer_size_callback ( void ( *buffer_size_callback ) ( nframes_t, void * ), void *user_data )
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{
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_buffer_size_callback = buffer_size_callback;
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_buffer_size_callback_user_data = user_data;
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}
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void
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Engine::port_connect_callback ( void ( *port_connect_callback ) ( jack_port_id_t a, jack_port_id_t b, int connect, void *arg), void *user_data )
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{
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_port_connect_callback = port_connect_callback;
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_port_connect_callback_user_data = user_data;
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}
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/*************/
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/* Callbacks */
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/*************/
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/* THREAD: RT */
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/** This is the jack xrun callback */
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int
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Engine::xrun ( void )
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{
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return 0;
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}
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/* THREAD: RT */
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void
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Engine::freewheel ( bool starting )
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{
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if ( starting )
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DMESSAGE( "entering freewheeling mode" );
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else
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DMESSAGE( "leaving freewheeling mode" );
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}
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/* THREAD: RT (non-RT) */
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int
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Engine::buffer_size ( nframes_t nframes )
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{
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/* JACK calls this in the RT thread, even though it's a
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* non-realtime operation. This mucks up our ability to do
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* THREAD_ASSERT, so just lie and say this is the UI thread... */
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_thread.set( "UI" );
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_buffer_size_callback( nframes, _buffer_size_callback_user_data );
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_thread.set( "RT" );
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return 0;
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}
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/* THREAD: ?? */
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void
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Engine::port_connect( jack_port_id_t a, jack_port_id_t b, int connect )
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{
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if ( _port_connect_callback )
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_port_connect_callback( a, b, connect, _port_connect_callback_user_data );
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}
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/* THREAD: RT */
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int
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Engine::process ( nframes_t nframes )
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{
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/* FIXME: wrong place for this */
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_thread.set( "RT" );
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if ( ! trylock() )
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{
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/* the data structures we need to access here (tracks and
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* their ports, but not track contents) may be in an
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* inconsistent state at the moment. Just punt and drop this
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* buffer. */
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++_buffers_dropped;
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return 0;
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}
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_process_callback(nframes, _process_callback_user_data);
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unlock();
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return 0;
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}
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/* TRHEAD: RT */
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void
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Engine::thread_init ( void )
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{
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_thread.set( "RT" );
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}
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/* THREAD: RT */
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void
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Engine::shutdown ( void )
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{
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}
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