src/audio/SDL_wave.h
changeset 0 74212992fb08
child 252 e8157fcb3114
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/audio/SDL_wave.h	Thu Apr 26 16:45:43 2001 +0000
@@ -0,0 +1,65 @@
+/*
+    SDL - Simple DirectMedia Layer
+    Copyright (C) 1997, 1998, 1999, 2000, 2001  Sam Lantinga
+
+    This library is free software; you can redistribute it and/or
+    modify it under the terms of the GNU Library General Public
+    License as published by the Free Software Foundation; either
+    version 2 of the License, or (at your option) any later version.
+
+    This library is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+    Library General Public License for more details.
+
+    You should have received a copy of the GNU Library General Public
+    License along with this library; if not, write to the Free
+    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+
+    Sam Lantinga
+    slouken@devolution.com
+*/
+
+#ifdef SAVE_RCSID
+static char rcsid =
+ "@(#) $Id$";
+#endif
+
+/* WAVE files are little-endian */
+
+/*******************************************/
+/* Define values for Microsoft WAVE format */
+/*******************************************/
+#define RIFF		0x46464952		/* "RIFF" */
+#define WAVE		0x45564157		/* "WAVE" */
+#define FACT		0x74636166		/* "fact" */
+#define LIST		0x5453494c		/* "LIST" */
+#define FMT		0x20746D66		/* "fmt " */
+#define DATA		0x61746164		/* "data" */
+#define PCM_CODE	0x0001
+#define MS_ADPCM_CODE	0x0002
+#define IMA_ADPCM_CODE	0x0011
+#define WAVE_MONO	1
+#define WAVE_STEREO	2
+
+/* Normally, these three chunks come consecutively in a WAVE file */
+typedef struct WaveFMT {
+/* Not saved in the chunk we read:
+	Uint32	FMTchunk;
+	Uint32	fmtlen;
+*/
+	Uint16	encoding;	
+	Uint16	channels;		/* 1 = mono, 2 = stereo */
+	Uint32	frequency;		/* One of 11025, 22050, or 44100 Hz */
+	Uint32	byterate;		/* Average bytes per second */
+	Uint16	blockalign;		/* Bytes per sample block */
+	Uint16	bitspersample;		/* One of 8, 12, 16, or 4 for ADPCM */
+} WaveFMT;
+
+/* The general chunk found in the WAVE file */
+typedef struct Chunk {
+	Uint32 magic;
+	Uint32 length;
+	Uint8 *data;			/* Data includes magic and length */
+} Chunk;
+