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120 lines
3.4 KiB
C
120 lines
3.4 KiB
C
/*---------------------------------------------------------------------------*\
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FILE........: insert_errors.c
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AUTHOR......: David Rowe
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DATE CREATED: 20/2/2013
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Inserts errors into a Codec 2 bit stream using error files. The
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error files have one 16 bit short per bit, the short is set to 1 if
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there is an error, or zero otherwise. The Codec 2 bit stream files
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are in packed format, i.e. c2enc/c2dec format.
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\*---------------------------------------------------------------------------*/
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/*
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Copyright (C) 2013 David Rowe
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All rights reserved.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License version 2.1, as
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published by the Free Software Foundation. This program is
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distributed in the hope that it will be useful, but WITHOUT ANY
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WARRANTY; without even the implied warranty of MERCHANTABILITY or
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FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
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License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with this program; if not, see <http://www.gnu.org/licenses/>.
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*/
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#include "codec2.h"
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#include <assert.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <errno.h>
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int main(int argc, char *argv[])
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{
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FILE *fin;
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FILE *fout;
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FILE *ferror;
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int i, start_bit, end_bit, bit;
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unsigned char byte;
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short error;
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int errors, bits;
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int bits_per_frame;
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if (argc < 4) {
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printf("%s InputBitFile OutputBitFile ErrorFile bitsPerFrame [startBit endBit]\n", argv[0]);
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printf("%s InputBitFile OutputBitFile BER\n", argv[0]);
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exit(1);
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}
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if (strcmp(argv[1], "-") == 0) fin = stdin;
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else if ( (fin = fopen(argv[1],"rb")) == NULL ) {
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fprintf(stderr, "Error opening input bit file: %s: %s.\n",
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argv[1], strerror(errno));
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exit(1);
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}
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if (strcmp(argv[2], "-") == 0) fout = stdout;
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else if ( (fout = fopen(argv[2],"wb")) == NULL ) {
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fprintf(stderr, "Error opening output speech file: %s: %s.\n",
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argv[2], strerror(errno));
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exit(1);
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}
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if ((ferror = fopen(argv[3],"rb")) == NULL ) {
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fprintf(stderr, "Error opening error file: %s: %s.\n",
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argv[3], strerror(errno));
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exit(1);
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}
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bits_per_frame = atoi(argv[4]);
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start_bit = 0; end_bit = bits_per_frame;
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if (argc == 7) {
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start_bit = atoi(argv[5]);
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end_bit = atoi(argv[6]);
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}
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bit = 0;
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bits = errors = 0;
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while(fread(&byte, sizeof(char), 1, fin) == 1) {
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for(i=0; i<8; i++, bits++) {
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if (bits != bits_per_frame) {
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if (fread(&error, sizeof(short), 1, ferror)) {
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if ((bit >= start_bit) && (bit <= end_bit))
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byte ^= error << (7-i);
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if (error)
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errors++;
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}
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else {
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fprintf(stderr,"bits: %d ber: %4.3f\n", bits, (float)errors/bits);
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fclose (fin); fclose(fout); fclose(ferror);
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exit(0);
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}
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}
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}
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fwrite(&byte, sizeof(char), 1, fout);
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if (bits == bits_per_frame)
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bits = 0;
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if (fout == stdout) fflush(stdout);
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if (fin == stdin) fflush(stdin);
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}
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fclose(fin);
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fclose(fout);
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fclose(ferror);
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fprintf(stderr,"bits: %d ber: %4.3f\n", bits, (float)errors/bits);
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return 0;
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}
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