mirror of
https://github.com/libretro/scummvm.git
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286 lines
7.0 KiB
C++
286 lines
7.0 KiB
C++
/* ScummVM - Scumm Interpreter
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* Copyright (C) 2006 The ScummVM project
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* Original ADL-Player source Copyright (C) 2004 by Patrick Combet aka Dorian Gray
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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 GOB_MUSIC_H
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#define GOB_MUSIC_H
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#include "sound/audiostream.h"
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#include "sound/mixer.h"
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#include "sound/fmopl.h"
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#include "common/mutex.h"
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#include "gob/gob.h"
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#include "gob/util.h"
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namespace Gob {
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class GobEngine;
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// Emulation of the "Paula" Amiga music chip
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class Paula: public Audio::AudioStream {
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public:
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Paula(GobEngine *vm, bool stereo = false, int intFreq = 0);
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~Paula();
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bool playing() const { return _playing; }
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void setInterruptFreq(int freq) { _intFreq = freq; }
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void clearVoice(int voice);
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void clearVoices() { int i; for (i = 0; i < 4; i++) clearVoice(i); }
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virtual void startPlay(void) {}
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virtual void stopPlay(void) {}
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virtual void pausePlay(bool pause) {}
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// AudioStream API
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int readBuffer(int16 *buffer, const int numSamples);
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bool isStereo() const { return _stereo; }
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bool endOfData() const { return _end; }
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int getRate() const { return _rate; }
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protected:
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struct Channel {
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int8 *data;
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int8 *dataRepeat;
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uint32 length;
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uint32 lengthRepeat;
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int16 period;
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byte volume;
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double offset;
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byte panning; // For stereo mixing; 0: left, 1: right
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} _voice[4];
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int _rate;
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int _intFreq;
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int _curInt;
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bool _stereo;
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bool _end;
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bool _playing;
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GobEngine *_vm;
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void mix(int16 *&buf, int8 data, int voice) {
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if (_stereo) {
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*buf++ += _voice[voice].panning == 0 ? 2 * _voice[voice].volume * data : 0;
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*buf++ += _voice[voice].panning == 1 ? 2 * _voice[voice].volume * data : 0;
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} else
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*buf++ += _voice[voice].volume * data;
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}
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virtual void interrupt(void) {};
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};
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class Infogrames : public Paula {
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public:
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class Instruments {
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public:
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struct Sample {
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int8 *data;
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int8 *dataRepeat;
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uint32 length;
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uint32 lengthRepeat;
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} _samples[32];
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uint8 _count;
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int8 *_sampleData;
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Instruments();
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~Instruments();
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bool load(Common::SeekableReadStream &ins);
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bool load(const char *ins) {
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Common::File f;
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if (f.open(ins))
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return load(f);
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return false;
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}
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};
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Infogrames(GobEngine *vm, bool stereo = false);
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~Infogrames();
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Instruments *getInstruments(void) const { return _instruments; }
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bool getRepeating(void) const { return _repCount != 0; }
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void setRepeating (int32 repCount) { _repCount = repCount; }
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void restart(void) { if (!_data || !_instruments) return; init(); _end = false; }
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virtual void startPlay(void) { if (_data && _instruments) { restart(); _playing = true; } }
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virtual void stopPlay(void) { _playing = false; }
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virtual void pausePlay(bool pause) { _playing = !pause; }
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bool load(Common::SeekableReadStream &dum);
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bool load(const char *dum) {
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Common::File f;
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if (f.open(dum))
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return load(f);
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return false;
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}
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void unload(bool destroyInstruments = false);
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template<typename T> bool loadInstruments(T ins) {
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unload(true);
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_instruments = new Instruments();
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if (!_instruments->load(ins)) {
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delete _instruments;
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_instruments = 0;
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return false;
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}
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return true;
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}
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protected:
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Instruments *_instruments;
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static const uint8 tickCount[];
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static const uint16 periods[];
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byte *_data;
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int32 _repCount;
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uint16 _volume;
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int16 _period;
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byte *_volSlideBlocks;
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byte *_periodSlideBlocks;
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byte *_subSong;
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byte *_cmdBlocks;
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uint8 _sample;
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uint8 _speedCounter;
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uint8 _speed;
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uint8 _newVol;
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uint8 _field_1E;
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struct Slide {
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int16 finetuneNeg;
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int16 finetunePos;
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byte *data;
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int8 amount;
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uint8 dataOffset;
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uint8 flags; // 0: Apply finetune modifier, 2: Don't slide, 7: Continuous
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uint8 curDelay1;
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uint8 curDelay2;
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};
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struct Channel {
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byte *cmdBlockIndices;
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byte *cmds;
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byte *cmdBlocks;
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Slide volSlide;
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Slide periodSlide;
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int16 curPeriod;
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int16 period;
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uint16 curCmdBlock;
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uint16 flags; // 0: Need init, 5: Loop cmdBlocks, 6: Ignore channel
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uint8 ticks;
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uint8 tickCount;
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int8 periodMod;
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uint8 field_2B;
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uint8 field_2C;
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uint8 field_2F;
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} _chn[4];
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void init(void);
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void reset(void);
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void getNextSample(Channel &chn);
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int16 tune(Slide &slide, int16 start) const;
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virtual void interrupt(void);
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};
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class Adlib : public Audio::AudioStream {
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public:
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Adlib(GobEngine *vm);
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virtual ~Adlib();
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void lock() { _mutex.lock(); }
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void unlock() { _mutex.unlock(); }
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bool playing() const { return _playing; }
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bool getRepeating(void) const { return _repCount != 0; }
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void setRepeating (int32 repCount) { _repCount = repCount; }
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int getIndex(void) const { return _index; }
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virtual void startPlay(void);
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virtual void stopPlay(void) { _mutex.lock(); _playing = false; _mutex.unlock(); }
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virtual void playTrack(const char *trackname);
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virtual void playBgMusic(void);
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virtual bool load(const char *filename);
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virtual void load(byte *data, int index=-1);
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virtual void unload(void);
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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 _rate; }
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protected:
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static const char *_tracks[][2];
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static const char *_trackFiles[];
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static const unsigned char _operators[];
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static const unsigned char _volRegNums [];
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FM_OPL *_opl;
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int _index;
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byte *_data;
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byte *_playPos;
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uint32 _dataSize;
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uint32 _rate;
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short _freqs[25][12];
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byte _notes[11];
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byte _notCol[11];
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byte _notLin[11];
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bool _notOn[11];
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byte _pollNotes[16];
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uint32 _samplesTillPoll;
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int32 _repCount;
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bool _playing;
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bool _first;
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bool _ended;
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bool _needFree;
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Common::Mutex _mutex;
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GobEngine *_vm;
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void premixerCall(int16 *buf, uint len);
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void writeOPL(byte reg, byte val);
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void setFreqs(void);
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void reset(void);
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void setVoices();
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void setVoice(byte voice, byte instr, bool set);
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void setKey(byte voice, byte note, bool on, bool spec);
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void setVolume(byte voice, byte volume);
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void pollMusic(void);
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};
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class Adlib_Dummy: public Adlib {
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public:
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Adlib_Dummy(GobEngine *vm) : Adlib(vm) {}
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virtual void startPlay(void) {};
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virtual void stopPlay(void) {};
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virtual void playTrack(const char *trackname) {};
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virtual void playBgAdlib(void) {};
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virtual bool load(const char *filename) { return true; }
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virtual void load(byte *data, int index=-1) {}
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virtual void unload(void) {};
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virtual ~Adlib_Dummy() {};
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};
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} // End of namespace Gob
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#endif
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