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comparison src/audio/SDL_wave.h @ 0:74212992fb08

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Initial revision
author Sam Lantinga <slouken@lokigames.com>
date Thu, 26 Apr 2001 16:45:43 +0000
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children e8157fcb3114
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1 /*
2 SDL - Simple DirectMedia Layer
3 Copyright (C) 1997, 1998, 1999, 2000, 2001 Sam Lantinga
4
5 This library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Library General Public
7 License as published by the Free Software Foundation; either
8 version 2 of the License, or (at your option) any later version.
9
10 This library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Library General Public License for more details.
14
15 You should have received a copy of the GNU Library General Public
16 License along with this library; if not, write to the Free
17 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
18
19 Sam Lantinga
20 slouken@devolution.com
21 */
22
23 #ifdef SAVE_RCSID
24 static char rcsid =
25 "@(#) $Id$";
26 #endif
27
28 /* WAVE files are little-endian */
29
30 /*******************************************/
31 /* Define values for Microsoft WAVE format */
32 /*******************************************/
33 #define RIFF 0x46464952 /* "RIFF" */
34 #define WAVE 0x45564157 /* "WAVE" */
35 #define FACT 0x74636166 /* "fact" */
36 #define LIST 0x5453494c /* "LIST" */
37 #define FMT 0x20746D66 /* "fmt " */
38 #define DATA 0x61746164 /* "data" */
39 #define PCM_CODE 0x0001
40 #define MS_ADPCM_CODE 0x0002
41 #define IMA_ADPCM_CODE 0x0011
42 #define WAVE_MONO 1
43 #define WAVE_STEREO 2
44
45 /* Normally, these three chunks come consecutively in a WAVE file */
46 typedef struct WaveFMT {
47 /* Not saved in the chunk we read:
48 Uint32 FMTchunk;
49 Uint32 fmtlen;
50 */
51 Uint16 encoding;
52 Uint16 channels; /* 1 = mono, 2 = stereo */
53 Uint32 frequency; /* One of 11025, 22050, or 44100 Hz */
54 Uint32 byterate; /* Average bytes per second */
55 Uint16 blockalign; /* Bytes per sample block */
56 Uint16 bitspersample; /* One of 8, 12, 16, or 4 for ADPCM */
57 } WaveFMT;
58
59 /* The general chunk found in the WAVE file */
60 typedef struct Chunk {
61 Uint32 magic;
62 Uint32 length;
63 Uint8 *data; /* Data includes magic and length */
64 } Chunk;
65