musix 0.3.5

Music player library for esoteric audio formats (music from C64,Amiga etc)
Documentation 
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#ifndef m_s98_h
#define m_s98_h

#include <stdint.h>
#include "device/s98types.h"
#include "device/s98device.h"

#define SAMPLE_RATE 48000
#define SYNC_RATE 60 /* (Hz) */
#define UNIT_RENDER (SAMPLE_RATE/SYNC_RATE)

#define MASTER_CLOCK (7987200)
#define LOOPNUM 3
#define FADEOUT_TIME 0/*(10 * SYNC_RATE)*/

#define S98DEVICE_MAX 16

/* S98 file header */
#define S98_MAGIC_V0	(0x53393830)	/* 'S980' */
#define S98_MAGIC_V1	(0x53393831)	/* 'S981' */
#define S98_MAGIC_V2	(0x53393832)	/* 'S982' */
#define S98_MAGIC_V3	(0x53393833)	/* 'S983' */
#define S98_MAGIC_VZ	(0x5339385A)	/* 'S98Z' */
#define S98_OFS_MAGIC		(0x00)
#define S98_OFS_TIMER_INFO1	(0x04)
#define S98_OFS_TIMER_INFO2	(0x08)
#define S98_OFS_COMPRESSING	(0x0C)
#define S98_OFS_OFSTITLE	(0x10)
#define S98_OFS_OFSDATA		(0x14)
#define S98_OFS_OFSLOOP		(0x18)
#define S98_OFS_OFSCOMP		(0x1C)
#define S98_OFS_DEVICECOUNT	(0x1C)
#define S98_OFS_DEVICEINFO	(0x20)

#define VGM_MAGIC		(0x56676D20)	/* 'Vgm ' */

class s98File {
public:
	bool OpenFromBuffer(const uint8_t *Buffer, uint32_t dwSize /*, SOUNDINFO *pInfo*/);
	/* bool Open(const char *cszFileName, SOUNDINFO *pInfo);*/
	void Close(void);
	uint32_t SetPosition(uint32_t dwpos);
	uint32_t Write(Int16 *Buffer, uint32_t numSample);
	s98File();
	~s98File();
protected:
	int number_of_devices;
	S98DEVICEIF *devices[S98DEVICE_MAX];
	uint8_t devicemap[0x40];

	uint8_t *s98data;
	uint8_t *s98head;
	uint8_t *s98top;
	uint8_t *s98loop;
	int length;
	uint32_t playtime; /* syncs */
	uint32_t looptime; /* syncs */

	uint8_t *s98cur;
	uint32_t curtime;

	int loopnum;
#if FADEOUT_TIME
	int loopcur;
	uint32_t fader;
#endif

#define SPS_SHIFT 28
#define SPS_LIMIT (1 << SPS_SHIFT)
	enum { SAMPLE_PER_SYNC, SYNC_PER_SAMPLE } spsmode;
	uint32_t sps;		/* sync/sample or sample/syjnc */
	uint32_t timerinfo1;
	uint32_t timerinfo2;

	double sync_per_sec;

	uint32_t lefthi;
	uint32_t leftlo;

	Sample bufdev[UNIT_RENDER * 2];

	void CalcTime(void);
	void Step(void);
	void Reset(void);

	void WriteSub(Int16 *Buffer, uint32_t numSample);
	uint32_t SyncToMsec(uint32_t sync);
	uint32_t MsecToSync(uint32_t ms);
};

#endif // !m_s98_h