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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/***************************************************************************
* audiooutputenginejack.cc
*
* Thu Sep 16 10:28:37 CEST 2010
* Copyright 2010 Bent Bisballe Nyeng
* deva@aasimon.org
****************************************************************************/
/*
* This file is part of DrumGizmo.
*
* DrumGizmo 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.
*
* DrumGizmo 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 DrumGizmo; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
*/
#include "audiooutputenginejack.h"
#include <string.h>
#include "drumgizmo.h"
extern "C" {
static int _wrap_jack_process(jack_nframes_t nframes, void *arg){
return ((AudioOutputEngineJack*)arg)->process(nframes);}
}
AudioOutputEngineJack::AudioOutputEngineJack()
{
jack_status_t status;
jack_client = jack_client_open("DrumGizmo", JackNullOption, &status);
jack_set_process_callback(jack_client, _wrap_jack_process, this);
}
AudioOutputEngineJack::~AudioOutputEngineJack()
{
jack_client_close(jack_client);
}
bool AudioOutputEngineJack::init(Channels *channels)
{
this->channels = channels;
Channels::iterator i = channels->begin();
while(i != channels->end()) {
jack_port_t *port =
jack_port_register(jack_client,
i->name.c_str(),
JACK_DEFAULT_AUDIO_TYPE,
JackPortIsOutput | JackPortIsTerminal,
0);
output_ports.push_back(port);
i->num = output_ports.size() - 1;
i++;
}
return true;
}
void AudioOutputEngineJack::run(DrumGizmo *drumgizmo)
{
gizmo = drumgizmo;
jack_activate(jack_client);
jack_connect(jack_client, "DrumGizmo:port0", "system:playback_1");
jack_connect(jack_client, "DrumGizmo:port1", "system:playback_2");
while(drumgizmo->isRunning()) {
sleep(1);
}
}
int AudioOutputEngineJack::process(jack_nframes_t nframes)
{
gizmo->pre(nframes);
Channels::iterator i = channels->begin();
while(i != channels->end()) {
jack_port_t *port = output_ports[i->num];
jack_default_audio_sample_t *buffer;
buffer = (jack_default_audio_sample_t *)jack_port_get_buffer(port, nframes);
memset(buffer, 0, nframes * sizeof(sample_t));
gizmo->getSamples(&(*i), buffer, nframes);
i++;
}
gizmo->post(nframes);
return 0;
}
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