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128 lines
4.1 KiB
C++
128 lines
4.1 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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#ifndef TWP_AUDIO_H
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#define TWP_AUDIO_H
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#include "common/str.h"
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#include "common/array.h"
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#include "common/stream.h"
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#include "audio/mixer.h"
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#include "twp/ggpack.h"
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namespace Audio {
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class SeekableAudioStream;
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}
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namespace Twp {
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enum {
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NUM_AUDIO_SLOTS = 32
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};
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class AudioChannel;
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class SoundDefinition;
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class SoundDefinition;
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class SoundStream : public Common::SeekableReadStream {
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public:
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void open(Common::SharedPtr<SoundDefinition> sndDef);
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virtual uint32 read(void *dataPtr, uint32 dataSize) override;
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virtual bool eos() const override;
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virtual int64 pos() const override;
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virtual int64 size() const override;
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virtual bool seek(int64 offset, int whence = SEEK_SET) override;
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private:
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MemStream _stream;
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};
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class SoundDefinition {
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public:
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friend class SoundStream;
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public:
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SoundDefinition(const Common::String &name);
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void load();
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int getId() const { return _id; }
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Common::String getName() const { return _name; }
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private:
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int _id; // identifier for this sound
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Common::String _name; // name of the sound to load
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Common::Array<byte> _buffer; // buffer containing the sound data
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bool _loaded = false; // indicates whether or not the sound buffer has been loaded
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};
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struct AudioSlot {
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Audio::SoundHandle handle; // handle returned when this sound has been played
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Common::SharedPtr<SoundDefinition> sndDef; // sound definition associated to this slot
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SoundStream stream; // audio stream
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bool busy = false; // is sound active
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float volume = 1.f; // actual volume for this slot
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float fadeInTimeMs = 0.f; // fade-in time in milliseconds
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float fadeOutTimeMs = 0.f; // fade-out time in milliseconds
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int total = 0; // duration of the sound in milliseconds
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int id = 0; // unique sound ID
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int objId = 0; // object ID or 0 if none
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int loopTimes = 0; // specified number of times to loop
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Audio::Mixer::SoundType soundType = Audio::Mixer::kPlainSoundType; // sound type: plain, music, sfx, speech
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};
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class AudioSystem {
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public:
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int play(Common::SharedPtr<SoundDefinition> sndDef, Audio::Mixer::SoundType cat, int loopTimes = 0, float fadeInTimeMs = 0.f, float volume = 1.f, int objId = 0);
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bool playing(int id) const;
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bool playing(Common::SharedPtr<SoundDefinition> soundDef) const;
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void fadeOut(int id, float fadeTime);
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void stop(int id);
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void setMasterVolume(float vol);
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float getMasterVolume() const;
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void setVolume(int id, float vol);
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int getElapsed(int id) const;
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int getDuration(int id) const;
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void update(float elapsed);
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Common::Array<Common::SharedPtr<SoundDefinition> > _soundDefs;
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AudioSlot _slots[NUM_AUDIO_SLOTS];
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Common::SharedPtr<SoundDefinition> _soundHover; // not used yet, should be used in the GUI
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private:
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void updateVolume(AudioSlot *slot);
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AudioSlot *getFreeSlot();
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private:
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float _masterVolume = 1.f;
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};
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} // End of namespace Twp
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#endif // TWP_H
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