You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
101 lines
2.6 KiB
101 lines
2.6 KiB
/*
|
|
* tplay - buffered audio player
|
|
*
|
|
* (c) 1997 ilkka karvinen <ik@iki.fi>
|
|
*
|
|
* Copyright under the GNU GENERAL PUBLIC LICENSE
|
|
* (see the file COPYING in this directory)
|
|
*
|
|
*
|
|
* SunOS audio file header functions.
|
|
* Reference: http://www.wotsit.org
|
|
*/
|
|
|
|
#include "tplayfunctions.h"
|
|
|
|
/* read_au returns zero if Sun audio file format is found. */
|
|
int read_au(struct info_struct* info,char * buffer) {
|
|
DWORD magic, start, end, encoding, speed, channels;
|
|
int bits;
|
|
|
|
|
|
/* If '.snd'-header exits, this should be an au-file */
|
|
magic = read_big_endian_long(buffer);
|
|
if (magic != SUN_MAGIC)
|
|
return (1);
|
|
|
|
start = read_big_endian_long(buffer + 0x04);
|
|
end = read_big_endian_long(buffer + 0x08);
|
|
encoding = read_big_endian_long(buffer + 0x0C);
|
|
speed = read_big_endian_long(buffer + 0x10);
|
|
channels = read_big_endian_long(buffer + 0x14);
|
|
|
|
#ifdef DEBUG
|
|
printf("Sun audio file.\nspeed: %ld, start: %ld, end: %ld, \
|
|
encoding: %X, channels: %ld\n",
|
|
speed, start, end, encoding, channels);
|
|
fflush(stdout);
|
|
#endif
|
|
|
|
bits = DEFAULT_BITS;
|
|
switch (encoding) {
|
|
case 1:
|
|
die("8-bit ISDN u-law Sun audio file not supported");
|
|
break;
|
|
case 2:
|
|
bits = 8;
|
|
break;
|
|
case 3:
|
|
bits = 16;
|
|
break;
|
|
case 4:
|
|
die("24-bit linear PCM Sun audio file not supported");
|
|
break;
|
|
case 5:
|
|
die("32-bit linear PCM Sun audio file not supported");
|
|
break;
|
|
case 6:
|
|
die("32-bit IEEE floating point Sun audio file not supported");
|
|
break;
|
|
case 7:
|
|
die("64-bit IEEE floating point Sun audio file not supported");
|
|
break;
|
|
case 23:
|
|
die("8-bit ISDN u-law compressed(G.721 ADPCM) Sun audio file \
|
|
not supported");
|
|
break;
|
|
default:
|
|
errdie("Unknown Sun audio file");
|
|
break;
|
|
}
|
|
|
|
info->filetype = SUN_FILE;
|
|
|
|
/* Set audio parameters */
|
|
info->speed = (int) speed;
|
|
info->bits = bits;
|
|
info->channels = (int) channels;
|
|
|
|
if (info->verbose) {
|
|
printf("Sun audio file: %ld samples/s, %d bits, %d channel(s).\n",
|
|
info->speed, info->bits, info->channels);
|
|
/*
|
|
if ((comment_size = start - SUN_HDRSIZE) > 0) {
|
|
printf("Header info: ");
|
|
for (i = 0; i < comment_size; i++)
|
|
nice_fputc((int) buffer[SUN_HDRSIZE + i], stdout);
|
|
printf("\n");
|
|
}
|
|
*/
|
|
}
|
|
|
|
/* Move data to start from the beginning of the buffer. */
|
|
/* This is to ensure the correct behaviour of rounding when 16bits */
|
|
/* and/or stereo sample is to be played. */
|
|
memmove(buffer, buffer + (start + 1), info->blocksize - start - 1);
|
|
|
|
info->headerskip = (int) (start + 1);
|
|
|
|
return (0);
|
|
}
|