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/*
* 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);
}
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