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/* 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.
*
* $URL$
* $Id$
*
*/
#ifndef SCUMM_PLAYER_V2CMS_H
#define SCUMM_PLAYER_V2CMS_H
#include "scumm/player_v2.h" // for channel_data
class CMSEmulator;
namespace Scumm {
class ScummEngine;
/**
* Scumm V2 CMS/Gameblaster MIDI driver.
*/
class Player_V2CMS : public Audio::AudioStream, public MusicEngine {
public:
Player_V2CMS(ScummEngine *scumm, Audio::Mixer *mixer);
virtual ~Player_V2CMS();
virtual void setMusicVolume(int vol);
virtual void startSound(int sound);
virtual void stopSound(int sound);
virtual void stopAllSounds();
virtual int getMusicTimer();
virtual int getSoundStatus(int sound) const;
// AudioStream API
int readBuffer(int16 *buffer, const int numSamples);
bool isStereo() const { return true; }
bool endOfData() const { return false; }
int getRate() const { return _sampleRate; }
protected:
#include "common/pack-start.h" // START STRUCT PACKING
struct Voice {
byte attack;
byte decay;
byte sustain;
byte release;
byte octadd;
int16 vibrato;
int16 vibrato2;
int16 noise;
} PACKED_STRUCT;
struct Voice2 {
byte *amplitudeOutput;
byte *freqOutput;
byte *octaveOutput;
uint8 channel;
int8 sustainLevel;
int8 attackRate;
uint8 maxAmpl;
int8 decayRate;
int8 sustainRate;
int8 releaseRate;
int8 releaseTime;
int8 vibratoRate;
int8 vibratoDepth;
int8 curVibratoRate;
int8 curVibratoUnk;
int8 unkVibratoRate;
int8 unkVibratoDepth;
int8 unkRate;
int8 unkCount;
int nextProcessState;
int8 curVolume;
int8 curOctave;
int8 curFreq;
int8 octaveAdd;
int8 playingNote;
Voice2 *nextVoice;
byte chanNumber;
} PACKED_STRUCT;
struct MusicChip {
byte ampl[4];
byte freq[4];
byte octave[2];
} PACKED_STRUCT;
#include "common/pack-end.h" // END STRUCT PACKING
Voice _cmsVoicesBase[16];
Voice2 _cmsVoices[8];
MusicChip _cmsChips[2];
int8 _tempo;
int8 _tempoSum;
byte _looping;
byte _octaveMask;
int16 _midiDelay;
Voice2 *_midiChannel[16];
byte _midiChannelUse[16];
byte *_midiData;
byte *_midiSongBegin;
int _loadedMidiSong;
byte _lastMidiCommand;
uint _outputTableReady;
byte _clkFrequenz;
byte _restart;
byte _curSno;
void loadMidiData(byte *data, int sound);
void play();
void processChannel(Voice2 *channel);
void processRelease(Voice2 *channel);
void processAttack(Voice2 *channel);
void processDecay(Voice2 *channel);
void processSustain(Voice2 *channel);
void processVibrato(Voice2 *channel);
void playMusicChips(const MusicChip *table);
void playNote(byte *&data);
void clearNote(byte *&data);
void offAllChannels();
void playVoice();
void processMidiData(uint ticks);
Voice2 *getFreeVoice();
Voice2 *getPlayVoice(byte param);
// from Player_V2
protected:
bool _isV3Game;
Audio::Mixer *_mixer;
Audio::SoundHandle _soundHandle;
ScummEngine *_vm;
CMSEmulator *_cmsEmu;
int _header_len;
uint32 _sampleRate;
uint32 _next_tick;
uint32 _tick_len;
int _timer_count[4];
int _timer_output;
int _current_nr;
byte *_current_data;
int _next_nr;
byte *_next_data;
byte *_retaddr;
Common::Mutex _mutex;
private:
union ChannelInfo {
channel_data d;
uint16 array[sizeof(channel_data)/2];
};
int _music_timer;
int _music_timer_ctr;
int _ticks_per_music_timer;
ChannelInfo _channels[5];
protected:
virtual void nextTick();
virtual void clear_channel(int i);
virtual void chainSound(int nr, byte *data);
virtual void chainNextSound();
private:
void do_mix(int16 *buf, uint len);
void execute_cmd(ChannelInfo *channel);
void next_freqs(ChannelInfo *channel);
};
} // End of namespace Scumm
#endif
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