i've tested, now you can too

2026-07-23 12:42:02 +00:00 · 2012-12-20 20:08:42 -06:00
parent d3fcfa8245
commit d67b96af8a
94 changed files with 25305 additions and 2005 deletions
@@ -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;
+}