src/audio/SDL_wave.h
changeset 0 74212992fb08
child 252 e8157fcb3114
equal deleted inserted replaced
-1:000000000000 0:74212992fb08
       
     1 /*
       
     2     SDL - Simple DirectMedia Layer
       
     3     Copyright (C) 1997, 1998, 1999, 2000, 2001  Sam Lantinga
       
     4 
       
     5     This library is free software; you can redistribute it and/or
       
     6     modify it under the terms of the GNU Library General Public
       
     7     License as published by the Free Software Foundation; either
       
     8     version 2 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     Library General Public License for more details.
       
    14 
       
    15     You should have received a copy of the GNU Library General Public
       
    16     License along with this library; if not, write to the Free
       
    17     Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
       
    18 
       
    19     Sam Lantinga
       
    20     slouken@devolution.com
       
    21 */
       
    22 
       
    23 #ifdef SAVE_RCSID
       
    24 static char rcsid =
       
    25  "@(#) $Id$";
       
    26 #endif
       
    27 
       
    28 /* WAVE files are little-endian */
       
    29 
       
    30 /*******************************************/
       
    31 /* Define values for Microsoft WAVE format */
       
    32 /*******************************************/
       
    33 #define RIFF		0x46464952		/* "RIFF" */
       
    34 #define WAVE		0x45564157		/* "WAVE" */
       
    35 #define FACT		0x74636166		/* "fact" */
       
    36 #define LIST		0x5453494c		/* "LIST" */
       
    37 #define FMT		0x20746D66		/* "fmt " */
       
    38 #define DATA		0x61746164		/* "data" */
       
    39 #define PCM_CODE	0x0001
       
    40 #define MS_ADPCM_CODE	0x0002
       
    41 #define IMA_ADPCM_CODE	0x0011
       
    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 /* Not saved in the chunk we read:
       
    48 	Uint32	FMTchunk;
       
    49 	Uint32	fmtlen;
       
    50 */
       
    51 	Uint16	encoding;	
       
    52 	Uint16	channels;		/* 1 = mono, 2 = stereo */
       
    53 	Uint32	frequency;		/* One of 11025, 22050, or 44100 Hz */
       
    54 	Uint32	byterate;		/* Average bytes per second */
       
    55 	Uint16	blockalign;		/* Bytes per sample block */
       
    56 	Uint16	bitspersample;		/* One of 8, 12, 16, or 4 for ADPCM */
       
    57 } WaveFMT;
       
    58 
       
    59 /* The general chunk found in the WAVE file */
       
    60 typedef struct Chunk {
       
    61 	Uint32 magic;
       
    62 	Uint32 length;
       
    63 	Uint8 *data;			/* Data includes magic and length */
       
    64 } Chunk;
       
    65