添加一些关于midi播放的项目

2025-03-24 14:30:56 +08:00
parent e31eb22077
commit 498b4ef13b
699 changed files with 186162 additions and 1 deletions
@@ -0,0 +1,96 @@
+#ifndef __SYNTH_CORE_H__
+#define __SYNTH_CORE_H__
+
+#define POLY_NUM 6
+#define ENVELOP_LEN 256
+#define DECAY_TIME_FACTOR 150
+
+#define SoundUnitSize 10
+
+#define pIncrement_int 1
+#define pIncrement_frac 0
+#define pWavetablePos_frac 2
+#define pWavetablePos_int_h 4
+#define pWavetablePos_int_l 3
+#define pEnvelopeLevel 5
+#define pEnvelopePos 6
+#define pVal 7
+#define pSampleVal 9
+
+#define pMixOut SoundUnitSize *POLY_NUM
+#define pLastSoundUnit (SoundUnitSize * POLY_NUM + 2)
+
+#ifndef __ASSEMBLER__
+#include <stdint.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+typedef struct _SoundUnit
+{
+	uint16_t increment;
+	uint8_t wavetablePos_frac;
+	uint16_t wavetablePos_int;
+	uint8_t envelopeLevel;
+	uint8_t envelopePos;
+	int16_t val;
+	int8_t sampleVal;
+} SoundUnit;
+
+typedef struct _SoundUnitSplit
+{
+	uint8_t increment_frac;
+	uint8_t increment_int;
+	uint8_t wavetablePos_frac;
+	uint16_t wavetablePos_int;
+	uint8_t envelopeLevel;
+	uint8_t envelopePos;
+	int16_t val;
+	int8_t sampleVal;
+} SoundUnitSplit;
+
+typedef union _SoundUnitUnion {
+	SoundUnit combine;
+	SoundUnitSplit split;
+} SoundUnitUnion;
+
+typedef struct _Synthesizer
+{
+	SoundUnitUnion SoundUnitUnionList[POLY_NUM];
+	int16_t mixOut;
+	uint8_t lastSoundUnit;
+} Synthesizer;
+
+extern const uint8_t EnvelopeTable[];
+
+extern void SynthInit(Synthesizer *synth);
+
+#ifdef RUN_TEST
+extern void NoteOnC(uint8_t note);
+extern void SynthC(void);
+extern void GenDecayEnvlopeC(void);
+#endif
+
+extern void NoteOnAsm(uint8_t note);
+extern void GenDecayEnvlopeAsm(void);
+extern void SynthAsm(void);
+
+extern const uint8_t EnvelopeTable[ENVELOP_LEN];
+
+#ifdef RUN_TEST
+extern Synthesizer synthForC;
+#endif
+
+extern Synthesizer synthForAsm;
+
+#ifdef __cplusplus
+} //end extern "C"
+#endif
+
+#else
+.extern EnvelopeTable
+.extern synthForAsm
+#endif
+
+#endif