File: libst.h

package info (click to toggle)
sox 12.16-6
  • links: PTS
  • area: main
  • in suites: potato
  • size: 1,180 kB
  • ctags: 1,466
  • sloc: ansic: 16,658; sh: 2,071; makefile: 126
file content (33 lines) | stat: -rw-r--r-- 1,298 bytes parent folder | download
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
/* libst.h - include file for portable sound tools library
**
** Copyright (C) 1989 by Jef Poskanzer.
**
** Permission to use, copy, modify, and distribute this software and its
** documentation for any purpose and without fee is hereby granted, provided
** that the above copyright notice appear in all copies and that both that
** copyright notice and this permission notice appear in supporting
** documentation.  This software is provided "as is" without express or
** implied warranty.
*/

/* These do not round data.  Caller must round appropriately. */

#ifdef FAST_ULAW_CONVERSION
extern int ulaw_exp_table[256];
extern unsigned char ulaw_comp_table[16384];
#define st_ulaw_to_linear(ulawbyte) ulaw_exp_table[ulawbyte]
#define st_linear_to_ulaw(linearword) ulaw_comp_table[(linearword / 4) & 0x3fff]
#else
unsigned char st_linear_to_ulaw( /* int sample */ );
int st_ulaw_to_linear( /* unsigned char ulawbyte */ );
#endif

#ifdef FAST_ALAW_CONVERSION
extern int Alaw_exp_table[256];
extern unsigned char Alaw_comp_table[16384];
#define st_Alaw_to_linear(Alawbyte) Alaw_exp_table[Alawbyte]
#define st_linear_to_Alaw(linearword) Alaw_comp_table[(linearword / 4) & 0x3fff]
#else
unsigned char st_linear_to_Alaw( /* int sample */ );
int st_Alaw_to_linear( /* unsigned char ulawbyte */ );
#endif