149 lines
3.9 KiB
C++
149 lines
3.9 KiB
C++
/* ScummVM - Graphic Adventure Engine
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*
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* ScummVM is the legal property of its developers, whose names
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* are too numerous to list here. Please refer to the COPYRIGHT
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* file distributed with this source distribution.
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*
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*/
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#include "ultima/ultima8/audio/audio_mixer.h"
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#include "ultima/ultima8/audio/audio_process.h"
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#include "ultima/ultima8/audio/u8_music_process.h"
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#include "ultima/ultima8/audio/cru_music_process.h"
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#include "ultima/ultima8/audio/audio_channel.h"
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#include "ultima/ultima8/audio/midi_player.h"
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#include "ultima/ultima8/kernel/kernel.h"
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#include "ultima/ultima8/ultima8.h"
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namespace Ultima {
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namespace Ultima8 {
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AudioMixer *AudioMixer::_audioMixer = nullptr;
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static const uint32 SAMPLE_RATE = 22050;
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static const int BASE_CHANNEL_COUNT = 16;
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static const int AMBIENT_CHANNEL_COUNT = 4;
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static const int TOTAL_CHANNEL_COUNT = BASE_CHANNEL_COUNT + AMBIENT_CHANNEL_COUNT;
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AudioMixer::AudioMixer(Audio::Mixer *mixer) : _mixer(mixer), _midiPlayer(nullptr) {
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_audioMixer = this;
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_channels.resize(TOTAL_CHANNEL_COUNT);
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for (int idx = 0; idx < TOTAL_CHANNEL_COUNT; ++idx)
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_channels[idx] = new AudioChannel(_mixer, SAMPLE_RATE, true);
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debug(1, "Creating AudioMixer...");
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}
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void AudioMixer::createProcesses() {
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Kernel *kernel = Kernel::get_instance();
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// Create the Audio Process
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kernel->addProcess(new AudioProcess());
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// Create the Music Process
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if (GAME_IS_U8) {
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kernel->addProcess(new U8MusicProcess(_midiPlayer));
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} else if (GAME_IS_CRUSADER) {
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kernel->addProcess(new CruMusicProcess());
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}
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}
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AudioMixer::~AudioMixer(void) {
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_audioMixer = nullptr;
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debug(1, "Destroying AudioMixer...");
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closeMidiOutput();
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for (int idx = 0; idx < TOTAL_CHANNEL_COUNT; ++idx)
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delete _channels[idx];
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}
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void AudioMixer::reset() {
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_mixer->stopAll();
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}
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int AudioMixer::playSample(AudioSample *sample, int loop, int priority, bool isSpeech, uint32 pitch_shift, byte volume, int8 balance, bool ambient) {
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int lowest = -1;
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int lowprior = 65536;
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int i;
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const int minchan = (ambient ? BASE_CHANNEL_COUNT : 0);
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const int maxchan = (ambient ? TOTAL_CHANNEL_COUNT : BASE_CHANNEL_COUNT);
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for (i = minchan; i < maxchan; i++) {
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if (!_channels[i]->isPlaying()) {
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lowest = i;
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break;
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}
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else if (_channels[i]->getPriority() < priority) {
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lowprior = _channels[i]->getPriority();
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lowest = i;
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}
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}
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if (i != maxchan || lowprior < priority)
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_channels[lowest]->playSample(sample, loop, priority, isSpeech, pitch_shift, volume, balance);
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else
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lowest = -1;
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return lowest;
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}
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bool AudioMixer::isPlaying(int chan) {
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if (chan >= TOTAL_CHANNEL_COUNT || chan < 0)
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return false;
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bool playing = _channels[chan]->isPlaying();
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return playing;
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}
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void AudioMixer::stopSample(int chan) {
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if (chan >= TOTAL_CHANNEL_COUNT || chan < 0)
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return;
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_channels[chan]->stop();
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}
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void AudioMixer::setPaused(int chan, bool paused) {
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if (chan >= TOTAL_CHANNEL_COUNT || chan < 0)
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return;
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_channels[chan]->setPaused(paused);
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}
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void AudioMixer::setVolume(int chan, byte volume, int8 balance) {
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if (chan >= TOTAL_CHANNEL_COUNT || chan < 0)
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return;
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_channels[chan]->setVolume(volume, balance);
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}
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void AudioMixer::openMidiOutput() {
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_midiPlayer = new MidiPlayer();
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}
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void AudioMixer::closeMidiOutput() {
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delete _midiPlayer;
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_midiPlayer = nullptr;
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}
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} // End of namespace Ultima8
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} // End of namespace Ultima
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