Leaked source code of windows server 2003
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/*
* @DEC_COPYRIGHT@ *//*
* HISTORY * $Log: ac3.h,v $ * Revision 1.1.2.3 1996/11/11 18:21:00 Hans_Graves * Added AC3_SYNC_WORD_REV define. * [1996/11/11 17:56:01 Hans_Graves] * * Revision 1.1.2.2 1996/11/08 21:50:39 Hans_Graves * Swapped bytes in SYNC_WORD * [1996/11/08 21:16:07 Hans_Graves] * * First time under SLIB. * [1996/11/08 16:23:53 Hans_Graves] * * $EndLog$ *//* File: usr_equ.h $Revision: 1.1.2.3 $ */
/****************************************************************************
; Unpublished work. Copyright 1993-1996 Dolby Laboratories, Inc.; All Rights Reserved.;; File: usr_equ.h; Common equates for AC-3 system;; History:; 8/2/93 Created;***************************************************************************/
#ifndef _AC3_H_
#define _AC3_H_
/**** General system equates ****/
#define NBLOCKS 6 /* # of time blocks per frame */
#define NCHANS 6 /* max # of discrete channels */
#define N 256 /* # of samples per time block */
#define AC3_FRAME_SIZE (NBLOCKS*N) /* 6 * 256 = 1536 */
/**** Miscellaneous equates ****/
#define NOUTWORDS (3840 / 2) /* max # words per frame */
#define NINFOWDS 10 /* # words needed by frame info */
/* Note: Because of mismatches between the way AC-3 word stream parsing works
** and the way that it's done for MPEG, you need to be careful using these** definitions*/
#define AC3_SYNC_WORD 0x0B77 /* Byte reversed AC-3 sync word */
#define AC3_SYNC_WORD_REV 0x770B /* packed data stream sync word */
#define AC3_SYNC_WORD_LEN 16 /* sync word length */
#define PCMCHANSZ 256 /* decoder overlap-add channel size */
#define PCM16BIT 1 /* 16-bit PCM code for Dolby SIP */
#ifdef KCAPABLE
#define NKCAPABLEMODES 4 /* # defined karaoke capable modes */
#define NKCAPABLEVARS 6 /* # karaoke pan/mix parameters */
#endif
#endif /* _AC3_H_ */
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