lib/bladeenc/common.c

   1 /*
   2                         (c) Copyright 1998-2000 - Tord Jansson
   3                         ======================================
   4
   5                 This file is part of the BladeEnc MP3 Encoder, based on
   6                 ISO's reference code for MPEG Layer 3 compression, and might
   7                 contain smaller or larger sections that are directly taken
   8                 from ISO's reference code.
   9
  10                 All changes to the ISO reference code herein are either
  11                 copyrighted by Tord Jansson (tord.jansson@swipnet.se)
  12                 or sublicensed to Tord Jansson by a third party.
  13
  14         BladeEnc is free software; you can redistribute this file
  15         and/or modify it under the terms of the GNU Lesser General Public
  16         License as published by the Free Software Foundation; either
  17         version 2.1 of the License, or (at your option) any later version.
  18
  19
  20
  21         ------------    Changes    ------------
  22
  23         2000-11-22  Andre Piotrowski
  24
  25         -       bug fix: mem_alloc() - no lomger a need to allocate block*2 bytes
  26 */
  27
  28 /***********************************************************************
  29 *
  30 *  Global Include Files
  31 *
  32 ***********************************************************************/
  33
  34 #include        <string.h> /* 1995-07-11 shn */
  35 #include        <ctype.h>
  36 #include        <stdlib.h>
  37
  38 #include    "common.h"
  39
  40
  41
  42
  43
  44 /***********************************************************************
  45 *
  46 *  Global Variable Definitions
  47 *
  48 ***********************************************************************/
  49
  50 /* 1: MPEG-1, 0: MPEG-2 LSF, 1995-07-11 shn */
  51 double                                  s_freq[2][4] =
  52 {
  53         {22.05, 24, 16, 0},
  54         {44.1 , 48, 32, 0}
  55 };
  56
  57 /* 1: MPEG-1, 0: MPEG-2 LSF, 1995-07-11 shn */
  58 int                                             bitratex[2][15] =
  59 {
  60         {   0,  8, 16, 24, 32, 40, 48, 56, 64, 80, 96,112,128,144,160},
  61         {   0, 32, 40, 48, 56, 64, 80, 96,112,128,160,192,224,256,320}
  62 };
  63
  64
  65
  66
  67
  68 /*******************************************************************************
  69 *
  70 *  Allocate number of bytes of memory equal to "block".
  71 *
  72 *******************************************************************************/
  73
  74 void                                    *mem_alloc (unsigned int block, char *item)
  75 {
  76         void                                    *ptr;
  77
  78         ptr = (void *) malloc (block);
  79
  80         memset (ptr, 0, block);
  81
  82         return ptr;
  83 }
  84
  85
  86
  87
  88
  89 /****************************************************************************
  90 *
  91 *  Free memory pointed to by "*ptr_addr".
  92 *
  93 *****************************************************************************/
  94
  95 void                                    mem_free (void **ptr_addr)
  96 {
  97         if (*ptr_addr != NULL)
  98         {
  99                 free (*ptr_addr);
 100                 *ptr_addr = NULL;
 101         }
 102 }
 103
 104
 105