theora-old/lib/pb.c

   1 /********************************************************************
   2  *                                                                  *
   3  * THIS FILE IS PART OF THE OggTheora SOFTWARE CODEC SOURCE CODE.   *
   4  * USE, DISTRIBUTION AND REPRODUCTION OF THIS LIBRARY SOURCE IS     *
   5  * GOVERNED BY A BSD-STYLE SOURCE LICENSE INCLUDED WITH THIS SOURCE *
   6  * IN 'COPYING'. PLEASE READ THESE TERMS BEFORE DISTRIBUTING.       *
   7  *                                                                  *
   8  * THE Theora SOURCE CODE IS COPYRIGHT (C) 2002-2003                *
   9  * by the Xiph.Org Foundation http://www.xiph.org/                  *
  10  *                                                                  *
  11  ********************************************************************
  12
  13   function:
  14   last mod: $Id$
  15
  16  ********************************************************************/
  17
  18 #include <stdlib.h>
  19 #include <string.h>
  20 #include "codec_internal.h"
  21
  22 void ClearTmpBuffers(PB_INSTANCE * pbi){
  23
  24   if(pbi->ReconDataBuffer)
  25     _ogg_free(pbi->ReconDataBuffer);
  26   if(pbi->DequantBuffer)
  27     _ogg_free(pbi->DequantBuffer);
  28   if(pbi->TmpDataBuffer)
  29     _ogg_free(pbi->TmpDataBuffer);
  30   if(pbi->TmpReconBuffer)
  31     _ogg_free(pbi->TmpReconBuffer);
  32   if(pbi->dequant_Y_coeffs)
  33     _ogg_free(pbi->dequant_Y_coeffs);
  34   if(pbi->dequant_U_coeffs)
  35     _ogg_free(pbi->dequant_U_coeffs);
  36   if(pbi->dequant_V_coeffs)
  37     _ogg_free(pbi->dequant_V_coeffs);
  38   if(pbi->dequant_InterY_coeffs)
  39     _ogg_free(pbi->dequant_InterY_coeffs);
  40   if(pbi->dequant_InterU_coeffs)
  41     _ogg_free(pbi->dequant_InterU_coeffs);
  42   if(pbi->dequant_InterV_coeffs)
  43     _ogg_free(pbi->dequant_InterV_coeffs);
  44
  45
  46   pbi->ReconDataBuffer=0;
  47   pbi->DequantBuffer = 0;
  48   pbi->TmpDataBuffer = 0;
  49   pbi->TmpReconBuffer = 0;
  50   pbi->dequant_Y_coeffs = 0;
  51   pbi->dequant_U_coeffs = 0;
  52   pbi->dequant_V_coeffs = 0;
  53   pbi->dequant_InterY_coeffs = 0;
  54   pbi->dequant_InterU_coeffs = 0;
  55   pbi->dequant_InterV_coeffs = 0;
  56
  57 }
  58
  59 void InitTmpBuffers(PB_INSTANCE * pbi){
  60
  61   /* clear any existing info */
  62   ClearTmpBuffers(pbi);
  63
  64   /* Adjust the position of all of our temporary */
  65   pbi->ReconDataBuffer      =
  66     _ogg_malloc(64*sizeof(*pbi->ReconDataBuffer));
  67
  68   pbi->DequantBuffer        =
  69     _ogg_malloc(64 * sizeof(*pbi->DequantBuffer));
  70
  71   pbi->TmpDataBuffer        =
  72     _ogg_malloc(64 * sizeof(*pbi->TmpDataBuffer));
  73
  74   pbi->TmpReconBuffer       =
  75     _ogg_malloc(64 * sizeof(*pbi->TmpReconBuffer));
  76
  77   pbi->dequant_Y_coeffs     =
  78     _ogg_malloc(64 * sizeof(*pbi->dequant_Y_coeffs));
  79
  80   pbi->dequant_U_coeffs    =
  81     _ogg_malloc(64 * sizeof(*pbi->dequant_U_coeffs));
  82
  83   pbi->dequant_V_coeffs    =
  84     _ogg_malloc(64 * sizeof(*pbi->dequant_V_coeffs));
  85
  86   pbi->dequant_InterY_coeffs =
  87     _ogg_malloc(64 * sizeof(*pbi->dequant_InterY_coeffs));
  88
  89   pbi->dequant_InterU_coeffs =
  90     _ogg_malloc(64 * sizeof(*pbi->dequant_InterU_coeffs));
  91
  92   pbi->dequant_InterV_coeffs =
  93     _ogg_malloc(64 * sizeof(*pbi->dequant_InterV_coeffs));
  94
  95 }
  96
  97 void ClearPBInstance(PB_INSTANCE *pbi){
  98   if(pbi){
  99     ClearTmpBuffers(pbi);
 100     if (pbi->opb) {
 101       _ogg_free(pbi->opb);
 102     }
 103   }
 104 }
 105
 106 void InitPBInstance(PB_INSTANCE *pbi){
 107   /* initialize whole structure to 0 */
 108   memset(pbi, 0, sizeof(*pbi));
 109
 110   InitTmpBuffers(pbi);
 111
 112   /* allocate memory for the oggpack_buffer */
 113 #ifndef LIBOGG2
 114   pbi->opb = _ogg_malloc(sizeof(oggpack_buffer));
 115 #else
 116   pbi->opb = _ogg_malloc(oggpack_buffersize());
 117 #endif
 118
 119   /* variables needing initialization (not being set to 0) */
 120
 121   pbi->ModifierPointer[0] = &pbi->Modifier[0][255];
 122   pbi->ModifierPointer[1] = &pbi->Modifier[1][255];
 123   pbi->ModifierPointer[2] = &pbi->Modifier[2][255];
 124   pbi->ModifierPointer[3] = &pbi->Modifier[3][255];
 125
 126   pbi->DecoderErrorCode = 0;
 127   pbi->KeyFrameType = DCT_KEY_FRAME;
 128   pbi->FramesHaveBeenSkipped = 0;
 129 }