Patch #1048326 Better MT-32 support

svn-id: r15635

1 files changed, 170 insertions, 0 deletions

diff --git a/backends/midi/mt32/synth.h b/backends/midi/mt32/synth.h
new file mode 100644
index 0000000000..1978a17a2f
--- /dev/null
+++ b/backends/midi/mt32/synth.h
@@ -0,0 +1,170 @@
+/* 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.
+ *
+ * $Header$
+ *
+ */
+
+#if !defined __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
+
+extern const char *rom_path;
+
+#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;
+};
+
+#ifndef BOOL
+	#define BOOL bool
+#endif
+#ifndef TRUE
+	#define TRUE true
+#endif
+#ifndef FALSE
+	#define FALSE false
+#endif
+
+// 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(char * baseDir, 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 Bit16s romfile[262656];
+extern Bit32s divtable[256];
+extern Bit32s smalldivtable[256];
+extern Bit32u wavtabler[64][256];
+extern Bit32u looptabler[16][16][256];	
+extern Bit16s sintable[65536];
+extern Bit32s penvtable[16][128];		
+extern Bit32s pulsetable[101];
+extern Bit32s pulseoffset[101];
+extern Bit32s sawtable[128][128];
+extern float filtcoeff[FILTERGRAN][32][16];	
+extern Bit32u lfoptable[101][128];
+extern Bit32s ampveltable[128][64];
+extern Bit32s amptable[129];
+extern Bit16s smallnoise[441];
+extern Bit32s samplepos;
+extern Bit16s* waveforms[4][256];
+extern Bit32u waveformsize[4][256];
+extern Bit8s LoopPatterns[16][16];
+extern int drumPan[30][2];
+extern float ResonFactor[32];
+extern float ResonInv[32];
+
+extern Bit32s getPitchEnvelope(dpoly::partialStatus *pStat, dpoly *poly);
+extern Bit32s getAmpEnvelope(dpoly::partialStatus *pStat, dpoly *poly);
+extern Bit32s getFiltEnvelope(Bit16s wg, dpoly::partialStatus *pStat, dpoly *poly);
+
+class CSynthMT32  {
+private:
+
+	unsigned char initmode;
+	bool isOpen;
+	SynthProperties myProp;
+	
+	bool InitTables(const char * baseDir);
+
+public:
+	CSynthMT32() : isOpen(false) {};
+
+	// Used to initialized the MT-32.  The baseDir parameter points to the location in the
+	// filesystem where the ROM and data files are located.  The second parameter specifies
+	// properties for the synthesizer, as outlined in the structure above.
+	// Returns TRUE if initialization was sucessful, otherwise returns FALSE.
+	bool ClassicOpen(const char *baseDir, 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(Bit32u msg);
+
+	// Sends a string of Sysex commands to the MT-32 for immediate interpretation
+        void PlaySysex(Bit8u * sysex, Bit32u 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(Bit8u * stream, Bit32u len, int volume);
+
+};
+
+#endif