2 * Copyright 1992 by Jutta Degener and Carsten Bormann, Technische
3 * Universitaet Berlin. See the accompanying file "COPYRIGHT" for
4 * details. THERE IS ABSOLUTELY NO WARRANTY FOR THIS SOFTWARE.
7 /* $Header: /tmp_amd/presto/export/kbs/jutta/src/gsm/RCS/toast_audio.c,v 1.6 1995/03/07 21:21:24 jutta Exp $ */
11 /* toast_audio -- functions to manipulate SunOS audio files.
13 * This is reverse engineered from our present soundfiles
14 * and in no way portable, durable or aesthetically pleasing.
17 extern FILE * in, * out;
19 extern char * progname;
21 extern int (*output) P((gsm_signal *)),
22 (*input ) P((gsm_signal *));
24 extern int alaw_input P((gsm_signal *)),
25 ulaw_input P((gsm_signal *)),
26 linear_input P((gsm_signal *));
28 extern int ulaw_output P((gsm_signal *));
30 static int put_u32 P2((f, u), FILE * f, unsigned long u)
32 /* Write a 32-bit unsigned value msb first.
34 if ( putc( (char)((u>>24) & 0x0FF), f) == EOF
35 || putc( (char)((u>>16) & 0x0FF), f) == EOF
36 || putc( (char)((u>> 8) & 0x0FF), f) == EOF
37 || putc( (char)( u & 0x0FF), f) == EOF) return -1;
42 static int get_u32 P2((f, up), FILE * f, unsigned long * up)
44 /* Read a 32-bit unsigned value msb first.
49 if ( (i = getc(f)) == EOF
50 || ((u = (unsigned char)i), (i = getc(f)) == EOF)
51 || ((u = (u<<8)|(unsigned char)i), (i = getc(f)) == EOF)
52 || ((u = (u<<8)|(unsigned char)i), (i = getc(f)) == EOF)) return -1;
53 *up = (u<<8)|(unsigned char)i;
57 int audio_init_input P0()
59 unsigned long len, enc; /* unsigned 32 bits */
65 || get_u32( in, &len )
66 || get_u32( in, &enc ) /* skip this */
67 || get_u32( in, &enc )) {
69 "%s: bad (missing?) header in Sun audio file \"%s\";\n\
70 Try one of -u, -a, -l instead (%s -h for help).\n",
71 progname, inname ? inname : "stdin", progname);
76 case 1: input = ulaw_input; break;
77 case 2: input = alaw_input; break;
78 case 3: input = linear_input; break;
81 "%s: warning: file format #%lu for %s not implemented, defaulting to u-law.\n",
82 progname, enc, inname);
88 if (getc(in) == EOF) {
90 "%s: EOF in header of Sun audio file \"%s\";\n\
91 Try one of -u, -a, -l instead (%s -h for help).\n",
92 progname, inname ? inname : "stdin", progname);
100 int audio_init_output P0()
102 if ( fputs(".snd", out) == EOF
104 || put_u32(out, ~(unsigned long)0)
106 || put_u32(out, 8000)
109 || put_u32(out, 0)) return -1;