mirror of
https://github.com/libretro/scummvm.git
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281 lines
7.0 KiB
C++
281 lines
7.0 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
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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 SCUMM_PLAYER_SID_H
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#define SCUMM_PLAYER_SID_H
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#include "common/mutex.h"
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#include "common/scummsys.h"
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#include "scumm/music.h"
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#include "sound/audiostream.h"
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#include "sound/mixer.h"
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#include "sound/softsynth/sid.h"
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namespace Scumm {
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// the "channel" parameters seem to be in fact SID register
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// offsets. Should be replaced.
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enum sid_reg_t {
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FREQ_VOICE1,
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FREQ_VOICE2,
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FREQ_VOICE3,
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FREQ_FILTER,
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PULSE_VOICE1,
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PULSE_VOICE2,
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PULSE_VOICE3
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};
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enum VideoStandard {
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PAL,
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NTSC
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};
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class ScummEngine;
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class Player_SID : public Audio::AudioStream, public MusicEngine {
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public:
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Player_SID(ScummEngine *scumm, Audio::Mixer *mixer);
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virtual ~Player_SID();
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virtual void setMusicVolume(int vol) { _maxvol = vol; }
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void startMusic(int songResIndex);
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virtual void startSound(int sound);
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virtual void stopSound(int sound);
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virtual void stopAllSounds();
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virtual int getSoundStatus(int sound) const;
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virtual int getMusicTimer();
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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 false; }
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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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Resid::SID *_sid;
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void SID_Write(int reg, uint8 data);
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void initSID();
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uint8 *getResource(int resID);
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// number of cpu cycles until next frame update
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Resid::cycle_count _cpuCyclesLeft;
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ScummEngine *_vm;
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Audio::Mixer *_mixer;
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Audio::SoundHandle _soundHandle;
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int _sampleRate;
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int _maxvol;
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Common::Mutex _mutex;
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VideoStandard _videoSystem;
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int _music_timer;
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uint8* _music;
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private:
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void initMusic(int songResIndex); // $7de6
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int initSound(int soundResID); // $4D0A
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void stopSound_intern(int soundResID); // $5093
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void stopAllSounds_intern(); // $4CAA
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void resetSID(); // $48D8
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void update(); // $481B
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void handleMusicBuffer();
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int setupSongFileData(); // $36cb
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void func_3674(int channel); // $3674
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void resetPlayerState(); // $48f7
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void processSongData(int channel); // $4939
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void readSetSIDFilterAndProps(int *offset, uint8* dataPtr); // $49e7
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void saveSongPos(int y, int channel);
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void updateFreq(int channel);
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void resetFreqDelta(int channel);
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void readSongChunk(int channel); // $4a6b
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void setSIDFreqAS(int channel); // $4be6
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void setSIDWaveCtrlReg(int channel); // $4C0D
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int setupSongPtr(int channel); // $4C1C
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void unlockResource(int chanResIndex); // $4CDA
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void countFreeChannels(); // $4f26
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void func_4F45(int channel); // $4F45
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void safeUnlockResource(int resIndex); // $4FEA
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void releaseResource(int resIndex); // $5031
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void releaseResChannels(int resIndex); // $5070
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void releaseResourceUnk(int resIndex); // $50A4
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void releaseChannel(int channel);
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void clearSIDWaveform(int channel);
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void stopChannel(int channel);
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void swapVars(int channel, int swapIndex); // $51a5
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void resetSwapVars(); // $52d0
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void prepareSwapVars(int channel); // $52E5
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void useSwapVars(int channel); // $5342
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void lockResource(int resIndex); // $4ff4
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void reserveChannel(int channel, uint8 prioValue, int chanResIndex); // $4ffe
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void unlockCodeLocation(); // $513e
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void lockCodeLocation(); // $514f
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void func_7eae(int channel, uint8* songFileDataPtr); // $7eae
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void func_819b(int channel); // $819b
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void buildStepTbl(int step); // $82B4
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int reserveSoundFilter(uint8 value, uint8 chanResIndex); // $4ED0
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int reserveSoundVoice(uint8 value, uint8 chanResIndex); // $4EB8
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void findLessPrioChannels(uint8 soundPrio); // $4ED8
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void releaseResourceBySound(int resID); // $5088
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void readVec6Data(int x, int *offset, uint8 *songFilePtr, int chanResID); // $4E99
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void unused1(); // $50AF
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uint8 chanBuffer[3][45];
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int resID_song;
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// statusBits1A/1B are always equal
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uint8 statusBits1A;
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uint8 statusBits1B;
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uint8 busyChannelBits;
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uint8 SIDReg23;
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uint8 SIDReg23Stuff;
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uint8 SIDReg24;
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uint8* chanFileData[3];
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uint16 chanDataOffset[3];
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uint8* songPosPtr[7];
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// 0..2: freq value voice1/2/3
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// 3: filter freq
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// 4..6: pulse width
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uint16 freqReg[7];
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// start offset[i] for songFileOrChanBufData to obtain songPosPtr[i]
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// vec6[0..2] = 0x0008;
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// vec6[4..6] = 0x0019;
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uint16 vec6[7];
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// current offset[i] for songFileOrChanBufData to obtain songPosPtr[i] (starts with vec6[i], increased later)
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uint16 songFileOrChanBufOffset[7];
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uint16 freqDelta[7];
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int freqDeltaCounter[7];
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uint8* swapSongPosPtr[3];
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uint8* swapVec5[3];
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uint16 swapVec8[3];
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uint16 swapVec10[3];
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uint16 swapFreqReg[3];
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int swapVec11[3];
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// never read
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//uint8* vec5[7];
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// never read
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//uint8 vec19[7];
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// never read (needed by scumm engine?)
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//bool curChannelActive;
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uint8* vec20[7];
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uint8* swapVec20[3];
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// resource status (never read)
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// bit7: some flag
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// bit6..0: counter (use-count?), maybe just bit0 as flag (used/unused?)
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uint8 resStatus[70];
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uint8* songFileOrChanBufData;
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uint8* actSongFileData;
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uint16 stepTbl[33];
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bool initializing;
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bool _soundInQueue;
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bool isVoiceChannel;
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bool isMusicPlaying;
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bool swapVarLoaded;
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bool bgSoundActive;
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bool filterUsed;
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uint8 bgSoundResID;
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uint8 freeChannelCount;
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// seems to be used for managing the three voices
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// bit[0..2]: 0 -> unused, 1 -> already in use
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uint8 usedChannelBits;
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uint8 attackReg[3];
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uint8 sustainReg[3];
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// -1/0/1
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int var481A;
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// bit-array: 00000cba
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// a/b/c: channel1/2/3
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uint8 songChannelBits;
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bool pulseWidthSwapped;
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bool swapPrepared;
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// never read
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//uint8 var5163;
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bool filterSwapped;
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uint8 SIDReg24_HiNibble;
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bool keepSwapVars;
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uint8 phaseBit[3];
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bool releasePhase[3];
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// values: a resID or -1
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// resIDs: 3, 4, 5 or song-number
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int _soundQueue[7];
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// values: a resID or 0
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// resIDs: 3, 4, 5 or song-number
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int channelMap[7];
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uint8 songPosUpdateCounter[7];
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// priortity of channel contents
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// MM: 1: lowest .. 120: highest (1,2,A,64,6E,73,78)
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// Zak: -???: lowest .. 120: highest (5,32,64,65,66,6E,78, A5,A6,AF,D7)
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uint8 chanPrio[7];
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// only [0..2] used?
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uint8 waveCtrlReg[7];
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uint8 swapAttack[2];
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uint8 swapSustain[2];
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uint8 swapSongPrio[3];
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int swapVec479C[3];
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uint8 swapVec19[3];
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uint8 swapSongPosUpdateCounter[3];
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uint8 swapWaveCtrlReg[3];
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bool actFilterHasLowerPrio;
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uint8 chansWithLowerPrioCount;
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uint8 minChanPrio;
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uint8 minChanPrioIndex;
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};
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} // End of namespace Scumm
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#endif
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