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/* ScummVM - Scumm Interpreter
* Copyright (C) 2004 The ScummVM project
* Based on Tristan's conversion of Canadacow's code
*
* 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*
* $Header$
*
*/
#ifndef CSYNTHMT32_H
#define CSYNTHMT32_H
#ifdef HAVE_X86
#if defined(_MSC_VER)
#define USE_MMX 2
#define I_ASM
#else
#define USE_MMX 0
#undef I_ASM
#endif
#else
#define USE_MMX 0
#endif
#define AMPENV 0
#define FILTENV 1
#define PITCHENV 2
// Filter setting
#define FILTER_FLOAT 1
#define FILTER_64BIT 0
#define FILTER_INT 0
#define FILTERGRAN 512
// Amplitude of waveform generator
#define WGAMP (7168)
//#define WGAMP (8192)
#include "backends/midi/mt32/structures.h"
#include "sound/mixer.h"
// Function that detects the availablity of SSE SIMD instructions
// On non-MSVC compilers it automatically returns FALSE as inline assembly is required
bool DetectSIMD();
// Function that detects the availablity of 3DNow instructions
// On non-MSVC compilers it automatically returns FALSE as inline assembly is required
bool Detect3DNow();
struct SynthProperties {
// Sample rate to use in mixing
int SampleRate;
// Flag to activate reverb. True = use reverb, False = no reverb
bool UseReverb;
// Flag True to use software set reverb settings, Flag False to set reverb settings in
// following parameters
bool UseDefault;
// When not using the default settings, this specifies one of the 4 reverb types
// 1 = Room 2 = Hall 3 = Plate 4 = Tap
int RevType;
// This specifies the delay time, from 0-7 (not sure of the actual MT-32's measurement)
int RevTime;
// This specifies the reverb level, from 0-7 (not sure of the actual MT-32's measurement)
int RevLevel;
};
// This is the specification of the Callback routine used when calling the RecalcWaveforms
// function
typedef void (*recalcStatusCallback)(int percDone);
// This external function recreates the base waveform file (waveforms.raw) using a specifed
// sampling rate. The callback routine provides interactivity to let the user know what
// percentage is complete in regenerating the waveforms. When a NULL pointer is used as the
// callback routine, no status is reported.
bool RecalcWaveforms(int sampRate, recalcStatusCallback callBack);
typedef float (*iir_filter_type)(float input,float *hist1_ptr, float *coef_ptr, int revLevel);
extern iir_filter_type usefilter;
extern partialFormat PCM[54];
extern int16 romfile[262656];
extern int32 divtable[256];
extern int32 smalldivtable[256];
extern uint32 wavtabler[64][256];
extern uint32 looptabler[16][16][256];
extern int16 sintable[65536];
extern int32 penvtable[16][128];
extern int32 pulsetable[101];
extern int32 pulseoffset[101];
extern int32 sawtable[128][128];
extern float filtcoeff[FILTERGRAN][32][16];
extern uint32 lfoptable[101][128];
extern int32 ampveltable[128][64];
extern int32 amptable[129];
extern int16 smallnoise[441];
extern int32 samplepos;
extern int16* waveforms[4][256];
extern uint32 waveformsize[4][256];
extern int8 LoopPatterns[16][16];
extern int drumPan[30][2];
extern float ResonFactor[32];
extern float ResonInv[32];
extern int32 getPitchEnvelope(dpoly::partialStatus *pStat, dpoly *poly);
extern int32 getAmpEnvelope(dpoly::partialStatus *pStat, dpoly *poly);
extern int32 getFiltEnvelope(int16 wg, dpoly::partialStatus *pStat, dpoly *poly);
class CSynthMT32 {
private:
unsigned char initmode;
bool isOpen;
SynthProperties myProp;
bool InitTables();
public:
CSynthMT32() : isOpen(false) {};
// Used to initialized the MT-32. The useProp parameter specifies
// properties for the synthesizer, as outlined in the structure above.
// Returns TRUE if initialization was sucessful, otherwise returns FALSE.
bool ClassicOpen(SynthProperties useProp);
// Closes the MT-32 and deallocates any memory used by the synthesizer
void Close(void);
// Sends a 4-byte MIDI message to the MT-32 for immediate playback
void PlayMsg(uint32 msg);
// Sends a string of Sysex commands to the MT-32 for immediate interpretation
void PlaySysex(uint8 * sysex, uint32 len);
// Save the system state to a sysex file specified by filename
int DumpSysex(char *filename);
// This callback routine is used to have the MT-32 generate samples to the specified
// output stream. The length is in whole samples, not bytes. (I.E. in 16-bit stereo,
// one sample is 4 bytes)
void MT32_CallBack(uint8 * stream, uint32 len, int volume);
};
#endif
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