mirror of
https://github.com/libretro/scummvm.git
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169 lines
3.7 KiB
C++
169 lines
3.7 KiB
C++
/* ScummVM - Scumm Interpreter
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* Copyright (C) 2006 The ScummVM project
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*
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* Copyright (C) 1999-2001 Sarien 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 __AGI_SOUND_H
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#define __AGI_SOUND_H
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#include "agi/agi.h"
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namespace Agi {
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#define BUFFER_SIZE 410
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#define SOUND_EMU_NONE 0
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#define SOUND_EMU_PC 1
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#define SOUND_EMU_TANDY 2
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#define SOUND_EMU_MAC 3
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#define SOUND_EMU_AMIGA 4
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#define SOUND_PLAYING 0x01
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#define WAVEFORM_SIZE 64
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#define ENV_ATTACK 10000 /**< envelope attack rate */
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#define ENV_DECAY 1000 /**< envelope decay rate */
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#define ENV_SUSTAIN 100 /**< envelope sustain level */
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#define ENV_RELEASE 7500 /**< envelope release rate */
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#define NUM_CHANNELS 7 /**< number of sound channels */
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/**
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* AGI engine sound driver structure.
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*/
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struct sound_driver {
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char *description;
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int (*init) (int16 * buffer);
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void (*deinit) (void);
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};
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/**
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* AGI sound resource structure.
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*/
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struct agi_sound {
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uint32 flen; /**< size of raw data */
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uint8 *rdata; /**< raw sound data */
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uint8 flags; /**< sound flags */
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uint16 type; /**< sound resource type */
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};
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/**
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* AGI sound note structure.
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*/
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struct agi_note {
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uint8 dur_lo; /**< LSB of note duration */
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uint8 dur_hi; /**< MSB of note duration */
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uint8 frq_0; /**< LSB of note frequency */
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uint8 frq_1; /**< MSB of note frequency */
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uint8 vol; /**< note volume */
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};
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/**
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* AGI engine sound channel structure.
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*/
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struct channel_info {
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#define AGI_SOUND_SAMPLE 0x0001
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#define AGI_SOUND_MIDI 0x0002
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#define AGI_SOUND_4CHN 0x0008
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uint32 type;
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struct agi_note *ptr;
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#ifdef USE_PCM_SOUND
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int16 *ins;
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int32 size;
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uint32 phase;
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#endif
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#define AGI_SOUND_LOOP 0x0001
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#define AGI_SOUND_ENVELOPE 0x0002
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uint32 flags;
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#define AGI_SOUND_ENV_ATTACK 3
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#define AGI_SOUND_ENV_DECAY 2
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#define AGI_SOUND_ENV_SUSTAIN 1
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#define AGI_SOUND_ENV_RELEASE 0
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uint32 adsr;
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int32 timer;
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uint32 end;
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uint32 freq;
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uint32 vol;
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uint32 env;
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};
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void decode_sound(int);
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void unload_sound(int);
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void play_sound(void);
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int init_sound(void);
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void deinit_sound(void);
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void start_sound(int, int);
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void stop_sound(void);
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uint32 mix_sound(void);
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void __init_sound(void);
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int load_instruments(char *fname);
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extern struct sound_driver *snd;
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#endif /* __AGI_SOUND_H */
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#ifdef USE_PCM_SOUND
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} // End of namespace Agi
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#include "sound/audiostream.h"
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namespace Audio {
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class Mixer;
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} // End of namespace Audio
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namespace Agi {
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class AGIMusic : public Audio::AudioStream {
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public:
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AGIMusic(Audio::Mixer * pMixer);
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~AGIMusic(void);
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virtual void setVolume(uint8 volume);
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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 {
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return false;
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}
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bool endOfData() const {
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return false;
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}
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int getRate() const {
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// FIXME: Ideally, we should use _sampleRate.
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return 22050;
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}
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private:
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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 Agi
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#endif
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