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1 /*
2     SDL - Simple DirectMedia Layer
3     Copyright (C) 1997-2006 Sam Lantinga
4 
5     This library is SDL_free software; you can redistribute it and/or
6     modify it under the terms of the GNU Lesser General Public
7     License as published by the Free Software Foundation; either
8     version 2.1 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     Lesser General Public License for more details.
14 
15     You should have received a copy of the GNU Lesser General Public
16     License along with this library; if not, write to the Free Software
17     Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
18 
19     Sam Lantinga
20     slouken@libsdl.org
21 */
22 #include "SDL_config.h"
23 
24 /* WAVE files are little-endian */
25 
26 /*******************************************/
27 /* Define values for Microsoft WAVE format */
28 /*******************************************/
29 #define RIFF		0x46464952		/* "RIFF" */
30 #define WAVE		0x45564157		/* "WAVE" */
31 #define FACT		0x74636166		/* "fact" */
32 #define LIST		0x5453494c		/* "LIST" */
33 #define FMT		0x20746D66		/* "fmt " */
34 #define DATA		0x61746164		/* "data" */
35 #define PCM_CODE	0x0001
36 #define MS_ADPCM_CODE	0x0002
37 #define IMA_ADPCM_CODE	0x0011
38 #define MP3_CODE	0x0055
39 #define WAVE_MONO	1
40 #define WAVE_STEREO	2
41 
42 /* Normally, these three chunks come consecutively in a WAVE file */
43 typedef struct WaveFMT {
44 /* Not saved in the chunk we read:
45 	Uint32	FMTchunk;
46 	Uint32	fmtlen;
47 */
48 	Uint16	encoding;
49 	Uint16	channels;		/* 1 = mono, 2 = stereo */
50 	Uint32	frequency;		/* One of 11025, 22050, or 44100 Hz */
51 	Uint32	byterate;		/* Average bytes per second */
52 	Uint16	blockalign;		/* Bytes per sample block */
53 	Uint16	bitspersample;		/* One of 8, 12, 16, or 4 for ADPCM */
54 } WaveFMT;
55 
56 /* The general chunk found in the WAVE file */
57 typedef struct Chunk {
58 	Uint32 magic;
59 	Uint32 length;
60 	Uint8 *data;
61 } Chunk;
62 
63