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/* ScummVM - Graphic Adventure Engine
*
* ScummVM is the legal property of its developers, whose names
* are too numerous to list here. Please refer to the COPYRIGHT
* file distributed with this source distribution.
*
* 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 3 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. If not, see <http://www.gnu.org/licenses/>.
*
*/
#include "ultima/ultima8/audio/audio_mixer.h"
#include "ultima/ultima8/audio/audio_process.h"
#include "ultima/ultima8/audio/u8_music_process.h"
#include "ultima/ultima8/audio/cru_music_process.h"
#include "ultima/ultima8/audio/audio_channel.h"
#include "ultima/ultima8/audio/midi_player.h"
#include "ultima/ultima8/kernel/kernel.h"
#include "ultima/ultima8/ultima8.h"
namespace Ultima {
namespace Ultima8 {
AudioMixer *AudioMixer::_audioMixer = nullptr;
static const uint32 SAMPLE_RATE = 22050;
static const int BASE_CHANNEL_COUNT = 16;
static const int AMBIENT_CHANNEL_COUNT = 4;
static const int TOTAL_CHANNEL_COUNT = BASE_CHANNEL_COUNT + AMBIENT_CHANNEL_COUNT;
AudioMixer::AudioMixer(Audio::Mixer *mixer) : _mixer(mixer), _midiPlayer(nullptr) {
_audioMixer = this;
_channels.resize(TOTAL_CHANNEL_COUNT);
for (int idx = 0; idx < TOTAL_CHANNEL_COUNT; ++idx)
_channels[idx] = new AudioChannel(_mixer, SAMPLE_RATE, true);
debug(1, "Creating AudioMixer...");
}
void AudioMixer::createProcesses() {
Kernel *kernel = Kernel::get_instance();
// Create the Audio Process
kernel->addProcess(new AudioProcess());
// Create the Music Process
if (GAME_IS_U8) {
kernel->addProcess(new U8MusicProcess(_midiPlayer));
} else if (GAME_IS_CRUSADER) {
kernel->addProcess(new CruMusicProcess());
}
}
AudioMixer::~AudioMixer(void) {
_audioMixer = nullptr;
debug(1, "Destroying AudioMixer...");
closeMidiOutput();
for (int idx = 0; idx < TOTAL_CHANNEL_COUNT; ++idx)
delete _channels[idx];
}
void AudioMixer::reset() {
_mixer->stopAll();
}
int AudioMixer::playSample(AudioSample *sample, int loop, int priority, bool isSpeech, uint32 pitch_shift, byte volume, int8 balance, bool ambient) {
int lowest = -1;
int lowprior = 65536;
int i;
const int minchan = (ambient ? BASE_CHANNEL_COUNT : 0);
const int maxchan = (ambient ? TOTAL_CHANNEL_COUNT : BASE_CHANNEL_COUNT);
for (i = minchan; i < maxchan; i++) {
if (!_channels[i]->isPlaying()) {
lowest = i;
break;
}
else if (_channels[i]->getPriority() < priority) {
lowprior = _channels[i]->getPriority();
lowest = i;
}
}
if (i != maxchan || lowprior < priority)
_channels[lowest]->playSample(sample, loop, priority, isSpeech, pitch_shift, volume, balance);
else
lowest = -1;
return lowest;
}
bool AudioMixer::isPlaying(int chan) {
if (chan >= TOTAL_CHANNEL_COUNT || chan < 0)
return false;
bool playing = _channels[chan]->isPlaying();
return playing;
}
void AudioMixer::stopSample(int chan) {
if (chan >= TOTAL_CHANNEL_COUNT || chan < 0)
return;
_channels[chan]->stop();
}
void AudioMixer::setPaused(int chan, bool paused) {
if (chan >= TOTAL_CHANNEL_COUNT || chan < 0)
return;
_channels[chan]->setPaused(paused);
}
void AudioMixer::setVolume(int chan, byte volume, int8 balance) {
if (chan >= TOTAL_CHANNEL_COUNT || chan < 0)
return;
_channels[chan]->setVolume(volume, balance);
}
void AudioMixer::openMidiOutput() {
_midiPlayer = new MidiPlayer();
}
void AudioMixer::closeMidiOutput() {
delete _midiPlayer;
_midiPlayer = nullptr;
}
} // End of namespace Ultima8
} // End of namespace Ultima
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