From b409a4b0c6131e01fc5a03c0fc31caa4829b0dec Mon Sep 17 00:00:00 2001
From: Johnathan Corgan <jcorgan@corganenterprises.com>
Date: Mon, 18 Jul 2011 15:54:43 -0700
Subject: gr-vocoder: re-implemented gr-codec2-vocoder inside gr-vocoder
---
gr-vocoder/lib/codec2/generate_codebook.c | 179 ++++++++++++++++++++++++++++++
1 file changed, 179 insertions(+)
create mode 100644 gr-vocoder/lib/codec2/generate_codebook.c
(limited to 'gr-vocoder/lib/codec2/generate_codebook.c')
diff --git a/gr-vocoder/lib/codec2/generate_codebook.c b/gr-vocoder/lib/codec2/generate_codebook.c
new file mode 100644
index 0000000000..0bea80d854
--- /dev/null
+++ b/gr-vocoder/lib/codec2/generate_codebook.c
@@ -0,0 +1,179 @@
+/*---------------------------------------------------------------------------*\
+
+ FILE........: generate_codebook.c
+ AUTHOR......: Bruce Perens
+ DATE CREATED: 29 Sep 2010
+
+ Generate header files containing LSP quantisers, runs at compile time.
+
+\*---------------------------------------------------------------------------*/
+
+/*
+ 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 <stdlib.h>
+#include <stdio.h>
+#include <ctype.h>
+#include <math.h>
+
+static const char usage[] =
+"Usage: %s filename array_name [filename ...]\n"
+"\tCreate C code for codebook tables.\n";
+
+static const char format[] =
+"The table format must be:\n"
+"\tTwo integers describing the dimensions of the codebook.\n"
+"\tThen, enough numbers to fill the specified dimensions.\n";
+
+static const char header[] =
+"/* THIS IS A GENERATED FILE. Edit generate_codebook.c and its input */\n\n"
+"/*\n"
+" * This intermediary file and the files that used to create it are under \n"
+" * The LGPL. See the file COPYING.\n"
+" */\n\n"
+"#include \"defines.h\"\n\n";
+
+struct codebook {
+ unsigned int k;
+ unsigned int log2m;
+ unsigned int m;
+ float * cb;
+};
+
+static void
+dump_array(const struct codebook * b, int index)
+{
+ int limit = b->k * b->m;
+ int i;
+
+ printf("static const float codes%d[] = {\n", index);
+ for ( i = 0; i < limit; i++ ) {
+ printf(" %g", b->cb[i]);
+ if ( i < limit - 1 )
+ printf(",");
+
+ /* organise VQs by rows, looks prettier */
+ if ( ((i+1) % b->k) == 0 )
+ printf("\n");
+ }
+ printf("};\n");
+}
+
+static void
+dump_structure(const struct codebook * b, int index)
+{
+ printf(" {\n");
+ printf(" %d,\n", b->k);
+ printf(" %g,\n", log(b->m) / log(2));
+ printf(" %d,\n", b->m);
+ printf(" codes%d\n", index);
+ printf(" }");
+}
+
+float
+get_float(FILE * in, const char * name, char * * cursor, char * buffer,
+ int size)
+{
+ for ( ; ; ) {
+ char * s = *cursor;
+ char c;
+
+ while ( (c = *s) != '\0' && !isdigit(c) && c != '-' && c != '.' )
+ s++;
+
+ /* Comments start with "#" and continue to the end of the line. */
+ if ( c != '\0' && c != '#' ) {
+ char * end = 0;
+ float f = 0;
+
+ f = strtod(s, &end);
+
+ if ( end != s )
+ *cursor = end;
+ return f;
+ }
+
+ if ( fgets(buffer, size, in) == NULL ) {
+ fprintf(stderr, "%s: Format error. %s\n", name, format);
+ exit(1);
+ }
+ *cursor = buffer;
+ }
+}
+
+static struct codebook *
+load(FILE * file, const char * name)
+{
+ char line[1024];
+ char * cursor = line;
+ struct codebook * b = malloc(sizeof(struct codebook));
+ int i;
+ int size;
+
+ *cursor = '\0';
+
+ b->k = (int)get_float(file, name, &cursor, line, sizeof(line));
+ b->m = (int)get_float(file, name ,&cursor, line, sizeof(line));
+ size = b->k * b->m;
+
+ b->cb = (float *)malloc(size * sizeof(float));
+
+ for ( i = 0; i < size; i++ )
+ b->cb[i] = get_float(file, name, &cursor, line, sizeof(line));
+
+ return b;
+}
+
+int
+main(int argc, char * * argv)
+{
+ struct codebook * * cb = malloc(argc * sizeof(struct codebook *));
+ int i;
+
+ if ( argc < 2 ) {
+ fprintf(stderr, usage, argv[0]);
+ fprintf(stderr, format);
+ exit(1);
+ }
+
+ for ( i = 0; i < argc - 2; i++ ) {
+ FILE * in = fopen(argv[i + 2], "r");
+
+ if ( in == NULL ) {
+ perror(argv[i + 2]);
+ exit(1);
+ }
+
+ cb[i] = load(in, argv[i + 2]);
+
+ fclose(in);
+ }
+
+ printf(header);
+ for ( i = 0; i < argc - 2; i++ ) {
+ printf(" /* %s */\n", argv[i + 2]);
+ dump_array(cb[i], i);
+ }
+ printf("\nconst struct lsp_codebook %s[] = {\n", argv[1]);
+ for ( i = 0; i < argc - 2; i++ ) {
+ printf(" /* %s */\n", argv[i + 2]);
+ dump_structure(cb[i], i);
+ printf(",\n");
+ }
+ printf(" { 0, 0, 0, 0 }\n");
+ printf("};\n");
+
+ return 0;
+}
--
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