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/*
TiMidity++ -- MIDI to WAVE converter and player
Copyright (C) 1999-2002 Masanao Izumo <mo@goice.co.jp>
Copyright (C) 1995 Tuukka Toivonen <tt@cgs.fi>
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
audio_cnv.h
Audio conversion for U-law, A-law, linear pcm 16-bit.
Final update: Thu Feb 22 1996
*/
#ifndef ___AUDIO_CNV_H_
#define ___AUDIO_CNV_H_
extern const char u2c_table[256];
extern const char c2u_table[256];
extern const char a2c_table[256];
extern const char c2a_table[256];
extern const short u2s_table[256];
extern const char s2u_table[16384];
extern const short a2s_table[256];
extern const char s2a_table[16384];
extern const char u2a_table[256];
extern const char a2u_table[256];
/* U-law-8bit <---> linear-8bit */
#define AUDIO_U2C(X) (u2c_table[(unsigned char)(X)])
#define AUDIO_C2U(X) (c2u_table[(unsigned char)(X)])
extern void convert_u2c(const char *src, char *tar, int n);
extern void convert_c2u(const char *src, char *tar, int n);
/* A-law-8bit <---> linear-8bit */
#define AUDIO_A2C(X) (a2c_table[(unsigned char)(X)])
#define AUDIO_C2A(X) (c2a_table[(unsigned char)(X)])
extern void convert_a2c(const char *src, char *tar, int n);
extern void convert_c2a(const char *src, char *tar, int n);
/* U-law-8bit <---> linear-16bit */
#define AUDIO_U2S(X) (u2s_table[(unsigned char)(X)])
#define AUDIO_S2U(X) (s2u_table[((X) >> 2) & 0x3fff])
extern void convert_u2s(const char *src, short *tar, int n);
extern void convert_s2u(const short *src, char *tar, int n);
/* A-law-8bit <---> linear-16bit */
#define AUDIO_A2S(X) (a2s_table[(unsigned char)(X)])
#define AUDIO_S2A(X) (s2a_table[((X) >> 2) & 0x3fff])
extern void convert_a2s(const char *src, short *tar, int n);
extern void convert_s2a(const short *src, char *tar, int n);
/* U-law-8bit <---> A-law-8bit */
#define AUDIO_U2A(X) (u2a_table[(unsigned char)(X)])
#define AUDIO_A2U(X) (a2u_table[(unsigned char)(X)])
extern void convert_u2a(const char *src, char *tar, int n);
extern void convert_a2u(const char *src, char *tar, int n);
/*
* U: U-law
* A: A-law
* C: signed 8-bit
* S: signed 16-bit
*/
#endif /* ___AUDIO_CNV_H_ */
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