vdr/ac3dec/sanity_check.c

/* 
 *  sanity_check.c
 *
 *	Copyright (C) Aaron Holtzman - May 1999
 *
 *  This file is part of ac3dec, a free Dolby AC-3 stream decoder.
 *	
 *  ac3dec is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2, or (at your option)
 *  any later version.
 *   
 *  ac3dec 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 General Public License for more details.
 *   
 *  You should have received a copy of the GNU General Public License
 *  along with GNU Make; see the file COPYING.  If not, write to
 *  the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. 
 *
 */

#include <stdlib.h>
#include <stdio.h>
#include "ac3.h"
#include "ac3_internal.h"
#include "sanity_check.h"


/**
 *
 **/

void sanity_check_init(syncinfo_t *syncinfo, bsi_t *bsi, audblk_t *audblk)
{
	syncinfo->magic = AC3_MAGIC_NUMBER;
	bsi->magic = AC3_MAGIC_NUMBER;
	audblk->magic1 = AC3_MAGIC_NUMBER;
	audblk->magic2 = AC3_MAGIC_NUMBER;
	audblk->magic3 = AC3_MAGIC_NUMBER;
}


/**
 *
 **/

int sanity_check(syncinfo_t *syncinfo, bsi_t *bsi, audblk_t *audblk)
{
	int i;

	if(syncinfo->magic != AC3_MAGIC_NUMBER) {
		fprintf(stderr,"\n** Sanity check failed -- syncinfo magic number **");
		return -1;
	}
	
	if(bsi->magic != AC3_MAGIC_NUMBER) {
		fprintf(stderr,"\n** Sanity check failed -- bsi magic number **");
		return -1;
	}

	if(audblk->magic1 != AC3_MAGIC_NUMBER) {
		fprintf(stderr,"\n** Sanity check failed -- audblk magic number 1 **"); 
		return -1;
	}

	if(audblk->magic2 != AC3_MAGIC_NUMBER) {
		fprintf(stderr,"\n** Sanity check failed -- audblk magic number 2 **"); 
		return -1;
	}

	if(audblk->magic3 != AC3_MAGIC_NUMBER) {
		fprintf(stderr,"\n** Sanity check failed -- audblk magic number 3 **"); 
		return -1;
	}

	for(i = 0;i < 5 ; i++) {
		if (audblk->fbw_exp[i][255] !=0 || audblk->fbw_exp[i][254] !=0 || 
				audblk->fbw_exp[i][253] !=0) {
			fprintf(stderr,"\n** Sanity check failed -- fbw_exp out of bounds **"); 
			return -1;
		}

		if (audblk->fbw_bap[i][255] !=0 || audblk->fbw_bap[i][254] !=0 || 
				audblk->fbw_bap[i][253] !=0) {
			fprintf(stderr,"\n** Sanity check failed -- fbw_bap out of bounds **"); 
			return -1;
		}

	}

	if (audblk->cpl_exp[255] !=0 || audblk->cpl_exp[254] !=0 || 
			audblk->cpl_exp[253] !=0) {
		fprintf(stderr,"\n** Sanity check failed -- cpl_exp out of bounds **"); 
		return -1;
	}

	if (audblk->cpl_bap[255] !=0 || audblk->cpl_bap[254] !=0 || 
			audblk->cpl_bap[253] !=0) {
		fprintf(stderr,"\n** Sanity check failed -- cpl_bap out of bounds **"); 
		return -1;
	}

	if (audblk->cpl_flt[255] !=0 || audblk->cpl_flt[254] !=0 || 
			audblk->cpl_flt[253] !=0) {
		fprintf(stderr,"\n** Sanity check failed -- cpl_mant out of bounds **"); 
		return -1;
	}

	if ((audblk->cplinu == 1) && (audblk->cplbegf > (audblk->cplendf+2))) {
		fprintf(stderr,"\n** Sanity check failed -- cpl params inconsistent **"); 
		return -1;
	}

	for(i=0; i < bsi->nfchans; i++) {
		if((audblk->chincpl[i] == 0) && (audblk->chbwcod[i] > 60)) {
			fprintf(stderr,"\n** Sanity check failed -- chbwcod too big **"); 
			return -1;
		}
	}

	return 0;
}