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Diffstat (limited to 'engines/bladerunner/audio_mixer.h')
-rw-r--r-- | engines/bladerunner/audio_mixer.h | 80 |
1 files changed, 80 insertions, 0 deletions
diff --git a/engines/bladerunner/audio_mixer.h b/engines/bladerunner/audio_mixer.h new file mode 100644 index 0000000000..75a0f08201 --- /dev/null +++ b/engines/bladerunner/audio_mixer.h @@ -0,0 +1,80 @@ +/* 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 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; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. + * + */ + +#ifndef BLADERUNNER_AUDIO_MIXER_H +#define BLADERUNNER_AUDIO_MIXER_H + +#include "audio/audiostream.h" +#include "audio/mixer.h" + +#include "common/mutex.h" + +namespace BladeRunner { + +class BladeRunnerEngine; + +class AudioMixer { + static const int kAudioMixerChannels = 9; + + struct Channel { + bool isPresent; + int priority; + bool loop; + Audio::SoundHandle handle; + Audio::AudioStream *stream; + float volume; + float volumeDelta; + float volumeTarget; + float pan; + float panDelta; + float panTarget; + void (*endCallback)(int channel, void *data); + void *callbackData; + }; + + BladeRunnerEngine *_vm; + + Channel _channels[kAudioMixerChannels]; + Common::Mutex _mutex; + +public: + AudioMixer(BladeRunnerEngine *vm); + ~AudioMixer(); + + int playStream(Audio::Mixer::SoundType type, Audio::RewindableAudioStream *stream, int priority, bool loop, int volume, int pan, void(*onEndCallback)(int, void *), void *callbackData); + void stop(int channel, int delay); + + void adjustVolume(int channel, int newVolume, int time); + void adjustPan(int channel, int newPan, int time); + + void resume(int channel, int delay); + void pause(int channel, int delay); + +private: + bool isActive(int channel); + void tick(); + static void timerCallback(void *refCon); +}; + +} // End of namespace BladeRunner + +#endif |