2021-03-23 07:51:33 +01:00
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//
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// ID Engine
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// ID_SD.h - Sound Manager Header
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// Version for Wolfenstein
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// By Jason Blochowiak
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//
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#ifndef __ID_SD__
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#define __ID_SD__
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#define alOut(n,b) YM3812Write(0, n, b)
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#define TickBase 70 // 70Hz per tick - used as a base for timer 0
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typedef enum
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{
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sdm_Off,
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sdm_PC,sdm_AdLib,
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} SDMode;
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typedef enum
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{
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smm_Off,smm_AdLib
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} SMMode;
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typedef enum
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{
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sds_Off,sds_PC,sds_SoundBlaster
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} SDSMode;
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typedef struct
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{
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longword length;
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word priority;
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} SoundCommon;
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#define ORIG_SOUNDCOMMON_SIZE 6
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// PC Sound stuff
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#define pcTimer 0x42
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#define pcTAccess 0x43
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#define pcSpeaker 0x61
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#define pcSpkBits 3
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typedef struct
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{
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SoundCommon common;
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byte data[1];
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} PCSound;
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// Register addresses
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// Operator stuff
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#define alChar 0x20
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#define alScale 0x40
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#define alAttack 0x60
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#define alSus 0x80
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#define alWave 0xe0
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// Channel stuff
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#define alFreqL 0xa0
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#define alFreqH 0xb0
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#define alFeedCon 0xc0
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// Global stuff
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#define alEffects 0xbd
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typedef struct
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{
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byte mChar,cChar,
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mScale,cScale,
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mAttack,cAttack,
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mSus,cSus,
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mWave,cWave,
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nConn,
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// These are only for Muse - these bytes are really unused
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voice,
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mode;
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byte unused[3];
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} Instrument;
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#define ORIG_INSTRUMENT_SIZE 16
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typedef struct
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{
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SoundCommon common;
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Instrument inst;
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byte block;
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byte data[1];
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} AdLibSound;
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#define ORIG_ADLIBSOUND_SIZE (ORIG_SOUNDCOMMON_SIZE + ORIG_INSTRUMENT_SIZE + 2)
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//
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// Sequencing stuff
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//
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#define sqMaxTracks 10
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typedef struct
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{
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word length;
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word values[1];
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} MusicGroup;
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typedef struct
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{
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int valid;
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fixed globalsoundx, globalsoundy;
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} globalsoundpos;
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extern globalsoundpos channelSoundPos[];
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// Global variables
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extern boolean AdLibPresent,
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SoundBlasterPresent,
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SoundPositioned;
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extern SDMode SoundMode;
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extern SDSMode DigiMode;
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extern SMMode MusicMode;
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extern int DigiMap[];
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extern int DigiChannel[];
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#define GetTimeCount() ((SDL_GetTicks()*7)/100)
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inline void Delay(int wolfticks)
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{
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if(wolfticks>0) SDL_Delay(wolfticks * 100 / 7);
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}
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// Function prototypes
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extern void SD_Startup(void),
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SD_Shutdown(void);
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extern int SD_GetChannelForDigi(int which);
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extern void SD_PositionSound(int leftvol,int rightvol);
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extern boolean SD_PlaySound(soundnames sound);
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extern void SD_SetPosition(int channel, int leftvol,int rightvol);
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extern void SD_StopSound(void),
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SD_WaitSoundDone(void);
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extern void SD_StartMusic(int chunk);
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extern void SD_ContinueMusic(int chunk, int startoffs);
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extern void SD_MusicOn(void),
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SD_FadeOutMusic(void);
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extern int SD_MusicOff(void);
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extern boolean SD_MusicPlaying(void);
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extern boolean SD_SetSoundMode(SDMode mode);
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extern boolean SD_SetMusicMode(SMMode mode);
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extern word SD_SoundPlaying(void);
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extern void SD_SetDigiDevice(SDSMode);
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extern void SD_PrepareSound(int which);
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extern int SD_PlayDigitized(word which,int leftpos,int rightpos);
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extern void SD_StopDigitized(void);
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#endif
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