quantity.h

MIDI解码程序(用VC编写)

/* 
    TiMidity++ -- MIDI to WAVE converter and player
    Copyright (C) 1999-2002 Masanao Izumo <[e-mail]>
    Copyright (C) 1995 Tuukka Toivonen <[e-mail]>

    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

    quantity.h
    
   	by Kentaro Sato	<[e-mail]>
*/

#ifndef ___QUANTITY_H_
#define ___QUANTITY_H_

#define QUANTITY_UNIT_TYPE(u)		QUANTITY_OF_##u, QUANTITY_UNIT_NAME(u##_NUM)
#define QUANTITY_UNIT_NAME(name)	QUANTITY_UNIT_##name
enum quantity_units {
	QUANTITY_UNIT_TYPE(UNDEFINED),		/* type only */
	QUANTITY_UNIT_TYPE(DIRECT_INT),		/* internal use */
	QUANTITY_UNIT_TYPE(DIRECT_FLOAT),	/* internal use */
	QUANTITY_UNIT_TYPE(TREMOLO_SWEEP),			/* int */
		QUANTITY_UNIT_NAME(TREMOLO_SWEEP_MS),	/* int */
	QUANTITY_UNIT_TYPE(TREMOLO_RATE),			/* int */
		QUANTITY_UNIT_NAME(TREMOLO_RATE_MS),	/* int */
		QUANTITY_UNIT_NAME(TREMOLO_RATE_HZ),	/* float */
	QUANTITY_UNIT_TYPE(VIBRATO_SWEEP),			/* int */
		QUANTITY_UNIT_NAME(VIBRATO_SWEEP_MS),	/* int */
	QUANTITY_UNIT_TYPE(VIBRATO_RATE),			/* int */
		QUANTITY_UNIT_NAME(VIBRATO_RATE_MS),	/* int */
		QUANTITY_UNIT_NAME(VIBRATO_RATE_HZ),	/* float */
};
#undef QUANTITY_UNIT_TYPE
#define QUANTITY_UNIT_TYPE(u)		QUANTITY_OF_##u

#define INIT_QUANTITY(q)		(q).type = QUANTITY_UNIT_TYPE(UNDEFINED)
#define IS_QUANTITY_DEFINED(q)	((q).type != QUANTITY_UNIT_TYPE(UNDEFINED))

typedef struct Quantity_ {
	uint16			type, unit;
	union {
		int32			i;
		FLOAT_T			f;
	} value;
} Quantity;

extern const char *string_to_quantity(const char *string, Quantity *quantity, uint16 type);
extern void int_to_quantity(int32 number, Quantity *quantity, uint16 type);
extern void float_to_quantity(FLOAT_T number, Quantity *quantity, uint16 type);
extern int32 quantity_to_int(const Quantity *quantity, int32 param);
extern FLOAT_T quantity_to_float(const Quantity *quantity, int32 param);

#ifdef ___QUANTITY_C_	/* definitions that are only used in quantity.c and will rarely change */

typedef int32 (*QuantityToIntProc)(int32 value, int32 param);
typedef FLOAT_T (*QuantityToFloatProc)(FLOAT_T value, int32 param);
typedef union {
	QuantityToIntProc	i;
	QuantityToFloatProc	f;
} QuantityConvertProc;

typedef struct {
	const char			*suffix;
	uint16				type, id;
	int					float_type;		/* is floating-point type */
	QuantityConvertProc	convert;
} QuantityHint;

#endif /* ___QUANTITY_C_ */

#endif /* ___QUANTITY_H_ */