| 1 | /* |
| 2 | SDL - Simple DirectMedia Layer |
| 3 | Copyright (C) 1997-2009 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 | |