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https://github.com/libretro/scummvm.git
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95 lines
2.6 KiB
C++
95 lines
2.6 KiB
C++
/* ScummVM - Scumm Interpreter
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* Copyright (C) 2006 The ScummVM project
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*
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* cinE Engine is (C) 2004-2005 by CinE Team
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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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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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*
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* $URL$
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* $Id$
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*
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*/
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#ifndef CINE_SNDDRIVER_H_
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#define CINE_SNDDRIVER_H_
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#include "sound/audiostream.h"
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#include "sound/fmopl.h"
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namespace Audio {
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class Mixer;
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}
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namespace Cine {
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#define ADLIB_REG_TIMER_1_DATA 2
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#define ADLIB_REG_TIMER_CONTROL_FLAGS 4
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#define ADLIB_REG_AM_VIBRATO_EG_KS 0x20
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#define ADLIB_REG_KEY_SCALING_OPERATOR_OUTPUT 0x40
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#define ADLIB_REG_ATTACK_RATE_DECAY_RATE 0x60
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#define ADLIB_REG_SUSTAIN_LEVEL_RELEASE_RATE_0 0x80
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#define ADLIB_REG_FREQUENCY_0 0xA0
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#define ADLIB_REG_KEY_ON_OCTAVE_FREQUENCY_0 0xB0
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#define ADLIB_REG_AM_VIBRATO_RHYTHM 0xBD
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#define ADLIB_REG_FEEDBACK_STRENGTH_CONNECTION_TYPE 0xC0
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#define ADLIB_REG_WAVE_SELECT 0xE0
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struct SoundDriver {
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void (*setupChannel) (int channelNum, const uint8 * data, int instrumentNum);
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void (*setChannelFrequency) (int channelNum, int frequency);
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void (*stopChannel) (int channelNum);
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void (*playSound) (uint8 * data, int channelNum, int volume);
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};
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extern uint16 snd_fadeOutCounter, snd_songTicksCounter;
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extern uint8 *snd_adlibInstrumentsTable[4];
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extern SoundDriver snd_driver;
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extern void snd_adlibDriverInit();
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extern void snd_adlibDriverExit();
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extern void snd_adlibDriverStopSong();
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extern void snd_resetChannel(int channelNum);
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class AdlibMusic : public AudioStream {
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public:
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AdlibMusic(Audio::Mixer * pMixer);
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~AdlibMusic(void);
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virtual void setVolume(uint8 volume);
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FM_OPL *getOPL() {
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return _opl;
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}
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// AudioStream API
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int readBuffer(int16 *buffer, const int numSamples) {
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premixerCall(buffer, numSamples / 2);
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return numSamples;
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}
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bool isStereo() const { return true; }
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bool endOfData() const { return false; }
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int getRate() const { return _sampleRate; }
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private:
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FM_OPL *_opl;
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Audio::Mixer * _mixer;
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uint32 _sampleRate;
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void premixerCall(int16 *buf, uint len);
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};
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} // End of namespace Cine
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#endif /* CINE_SNDDRIVER_H_ */
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