93 lines
2.5 KiB
C
93 lines
2.5 KiB
C
/*---------------------------------------------------------------------------*\
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FILE........: c2demo.c
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AUTHOR......: David Rowe
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DATE CREATED: 15/11/2010
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Encodes and decodes a file of raw speech samples using Codec 2.
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Demonstrates use of Codec 2 function API.
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Note to convert a wave file to raw and vice-versa:
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$ sox file.wav -r 8000 -s -2 file.raw
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$ sox -r 8000 -s -2 file.raw file.wav
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\*---------------------------------------------------------------------------*/
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/*
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Copyright (C) 2010 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 <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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#define BITS_SIZE ((CODEC2_BITS_PER_FRAME + 7) / 8)
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int main(int argc, char *argv[])
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{
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struct CODEC2 *codec2;
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FILE *fin;
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FILE *fout;
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short *buf;
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unsigned char *bits;
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int nsam, nbit;
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if (argc != 3) {
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printf("usage: %s InputRawSpeechFile OutputRawSpeechFile\n", argv[0]);
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exit(1);
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}
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if ( (fin = fopen(argv[1],"rb")) == NULL ) {
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fprintf(stderr, "Error opening input speech 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 ( (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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/* Note only one set of Codec 2 states is required for an encoder
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and decoder pair. */
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codec2 = codec2_create(CODEC2_MODE_1400);
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nsam = codec2_samples_per_frame(codec2);
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buf = (short*)malloc(nsam*sizeof(short));
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nbit = codec2_bits_per_frame(codec2);
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bits = (unsigned char*)malloc(nbit*sizeof(char));
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while(fread(buf, sizeof(short), nsam, fin) == (size_t)nsam) {
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codec2_encode(codec2, bits, buf);
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codec2_decode(codec2, buf, bits);
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fwrite(buf, sizeof(short), nsam, fout);
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}
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free(buf);
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free(bits);
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codec2_destroy(codec2);
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fclose(fin);
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fclose(fout);
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return 0;
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}
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