SDL  2.0
SDL_wave.h
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1 /*
2  Simple DirectMedia Layer
3  Copyright (C) 1997-2018 Sam Lantinga <slouken@libsdl.org>
4 
5  This software is provided 'as-is', without any express or implied
6  warranty. In no event will the authors be held liable for any damages
7  arising from the use of this software.
8 
9  Permission is granted to anyone to use this software for any purpose,
10  including commercial applications, and to alter it and redistribute it
11  freely, subject to the following restrictions:
12 
13  1. The origin of this software must not be misrepresented; you must not
14  claim that you wrote the original software. If you use this software
15  in a product, an acknowledgment in the product documentation would be
16  appreciated but is not required.
17  2. Altered source versions must be plainly marked as such, and must not be
18  misrepresented as being the original software.
19  3. This notice may not be removed or altered from any source distribution.
20 */
21 #include "../SDL_internal.h"
22 
23 /* WAVE files are little-endian */
24 
25 /*******************************************/
26 /* Define values for Microsoft WAVE format */
27 /*******************************************/
28 #define RIFF 0x46464952 /* "RIFF" */
29 #define WAVE 0x45564157 /* "WAVE" */
30 #define FACT 0x74636166 /* "fact" */
31 #define LIST 0x5453494c /* "LIST" */
32 #define BEXT 0x74786562 /* "bext" */
33 #define JUNK 0x4B4E554A /* "JUNK" */
34 #define FMT 0x20746D66 /* "fmt " */
35 #define DATA 0x61746164 /* "data" */
36 #define PCM_CODE 0x0001
37 #define MS_ADPCM_CODE 0x0002
38 #define IEEE_FLOAT_CODE 0x0003
39 #define IMA_ADPCM_CODE 0x0011
40 #define MP3_CODE 0x0055
41 #define EXTENSIBLE_CODE 0xFFFE
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 {
48 /* Not saved in the chunk we read:
49  Uint32 FMTchunk;
50  Uint32 fmtlen;
51 */
53  Uint16 channels; /* 1 = mono, 2 = stereo */
54  Uint32 frequency; /* One of 11025, 22050, or 44100 Hz */
55  Uint32 byterate; /* Average bytes per second */
56  Uint16 blockalign; /* Bytes per sample block */
57  Uint16 bitspersample; /* One of 8, 12, 16, or 4 for ADPCM */
58 } WaveFMT;
59 
60 /* The general chunk found in the WAVE file */
61 typedef struct Chunk
62 {
66 } Chunk;
67 
68 typedef struct WaveExtensibleFMT
69 {
74  Uint8 subformat[16]; /* a GUID. */
76 
77 /* vi: set ts=4 sw=4 expandtab: */
Uint16 blockalign
Definition: SDL_wave.h:56
Uint16 validbits
Definition: SDL_wave.h:72
Definition: SDL_wave.h:61
Uint32 length
Definition: SDL_wave.h:64
Uint32 channelmask
Definition: SDL_wave.h:73
uint32_t Uint32
Definition: SDL_stdinc.h:181
Uint16 encoding
Definition: SDL_wave.h:52
Uint16 channels
Definition: SDL_wave.h:53
WaveFMT format
Definition: SDL_wave.h:70
uint8_t Uint8
Definition: SDL_stdinc.h:157
Uint8 * data
Definition: SDL_wave.h:65
Uint32 magic
Definition: SDL_wave.h:63
uint16_t Uint16
Definition: SDL_stdinc.h:169
Uint32 frequency
Definition: SDL_wave.h:54
Uint16 bitspersample
Definition: SDL_wave.h:57
Uint32 byterate
Definition: SDL_wave.h:55