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