1 files changed, 86 insertions, 0 deletions
diff --git a/gr-vocoder/lib/codec2/c2demo.c b/gr-vocoder/lib/codec2/c2demo.c
new file mode 100644
index 000000000..efa8d6449
--- /dev/null
+++ b/gr-vocoder/lib/codec2/c2demo.c
@@ -0,0 +1,86 @@
+/*---------------------------------------------------------------------------*\
+
+  FILE........: c2demo.c
+  AUTHOR......: David Rowe
+  DATE CREATED: 15/11/2010
+
+  Encodes and decodes a file of raw speech samples using Codec 2.
+  Demonstrates use of Codec 2 function API.
+
+  Note to convert a wave file to raw and vice-versa:
+
+    $ sox file.wav -r 8000 -s -2 file.raw
+    $ sox -r 8000 -s -2 file.raw file.wav
+
+\*---------------------------------------------------------------------------*/
+
+/*
+  Copyright (C) 2010 David Rowe
+
+  All rights reserved.
+
+  This program is free software; you can redistribute it and/or modify
+  it under the terms of the GNU Lesser General Public License version 2.1, as
+  published by the Free Software Foundation.  This program 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 Lesser General Public License
+  along with this program; if not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include "codec2.h"
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <errno.h>
+
+#define BITS_SIZE	((CODEC2_BITS_PER_FRAME + 7) / 8)
+
+int main(int argc, char *argv[])
+{
+    void *codec2;
+    FILE *fin;
+    FILE *fout;
+    short buf[CODEC2_SAMPLES_PER_FRAME];
+    unsigned char  bits[BITS_SIZE];
+
+    if (argc != 3) {
+	printf("usage: %s InputRawSpeechFile OutputRawSpeechFile\n", argv[0]);
+	exit(1);
+    }
+ 
+    if ( (fin = fopen(argv[1],"rb")) == NULL ) {
+	fprintf(stderr, "Error opening input speech file: %s: %s.\n",
+         argv[1], strerror(errno));
+	exit(1);
+    }
+
+    if ( (fout = fopen(argv[2],"wb")) == NULL ) {
+	fprintf(stderr, "Error opening output speech file: %s: %s.\n",
+         argv[2], strerror(errno));
+	exit(1);
+    }
+
+    /* Note only one set of Codec 2 states is required for an encoder
+       and decoder pair. */
+
+    codec2 = codec2_create();
+
+    while(fread(buf, sizeof(short), CODEC2_SAMPLES_PER_FRAME, fin) == 
+	  CODEC2_SAMPLES_PER_FRAME) {
+	codec2_encode(codec2, bits, buf);
+	codec2_decode(codec2, buf, bits);
+	fwrite(buf, sizeof(short), CODEC2_SAMPLES_PER_FRAME, fout);
+    }
+
+    codec2_destroy(codec2);
+
+    fclose(fin);
+    fclose(fout);
+
+    return 0;
+}