src/audio/SDL_wave.h
author Sam Lantinga
Wed, 17 May 2006 08:18:28 +0000
branchSDL-1.3
changeset 1659 14717b52abc0
parent 1402 d910939febfa
child 1662 782fd950bd46
child 4159 a1b03ba2fcd0
permissions -rw-r--r--
Merge trunk-1.3-3
     1 /*
     2     SDL - Simple DirectMedia Layer
     3     Copyright (C) 1997-2006 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