1 /*---------------------------------------------------------------------------*\
2
3 FILE........: c2demo.c
4 AUTHOR......: David Rowe
5 DATE CREATED: 15/11/2010
6
7 Encodes and decodes a file of raw speech samples using Codec 2.
8 Demonstrates use of Codec 2 function API.
9
10 cd codec2/build_linux
11 ./demo/c2demo ../raw/hts1a.raw his1a_out.raw
12 aplay -f S16_LE hts1a_out.raw
13
14 \*---------------------------------------------------------------------------*/
15
16 /*
17 Copyright (C) 2010 David Rowe
18
19 All rights reserved.
20
21 This program is free software; you can redistribute it and/or modify
22 it under the terms of the GNU Lesser General Public License version 2.1, as
23 published by the Free Software Foundation. This program is
24 distributed in the hope that it will be useful, but WITHOUT ANY
25 WARRANTY; without even the implied warranty of MERCHANTABILITY or
26 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
27 License for more details.
28
29 You should have received a copy of the GNU Lesser General Public License
30 along with this program; if not, see <http://www.gnu.org/licenses/>.
31 */
32
33 #include <stdio.h>
34 #include <stdlib.h>
35 #include "codec2.h"
36
main(int argc,char * argv[])37 int main(int argc, char *argv[])
38 {
39 struct CODEC2 *codec2;
40 FILE *fin;
41 FILE *fout;
42
43 if (argc != 3) {
44 printf("usage: %s InputRawSpeechFile OutputRawSpeechFile\n", argv[0]);
45 exit(1);
46 }
47
48 if ( (fin = fopen(argv[1],"rb")) == NULL ) {
49 fprintf(stderr, "Error opening input speech file: %s\n", argv[1]);
50 exit(1);
51 }
52
53 if ( (fout = fopen(argv[2],"wb")) == NULL ) {
54 fprintf(stderr, "Error opening output speech file: %s\n", argv[2]);
55 exit(1);
56 }
57
58 /* Note only one set of Codec 2 states is required for an encoder
59 and decoder pair. */
60 codec2 = codec2_create(CODEC2_MODE_1300);
61 size_t nsam = codec2_samples_per_frame(codec2);
62 short speech_samples[nsam];
63 /* Bits from the encoder are packed into bytes */
64 unsigned char compressed_bytes[codec2_bytes_per_frame(codec2)];
65
66 while(fread(speech_samples, sizeof(short), nsam, fin) == nsam) {
67 codec2_encode(codec2, compressed_bytes, speech_samples);
68 codec2_decode(codec2, speech_samples, compressed_bytes);
69 fwrite(speech_samples, sizeof(short), nsam, fout);
70 }
71
72 codec2_destroy(codec2);
73 fclose(fin);
74 fclose(fout);
75
76 return 0;
77 }
78