1 /* 2 SDL - Simple DirectMedia Layer 3 Copyright (C) 1997-2012 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 (at) 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
