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