1 /* |
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2 * Copyright (c) 2010 Ixonos Plc. |
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3 * All rights reserved. |
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4 * This component and the accompanying materials are made available |
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5 * under the terms of the "Eclipse Public License v1.0" |
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6 * which accompanies this distribution, and is available |
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7 * at the URL "http://www.eclipse.org/legal/epl-v10.html". |
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8 * |
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9 * Initial Contributors: |
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10 * Nokia Corporation - Initial contribution |
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11 * |
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12 * Contributors: |
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13 * Ixonos Plc |
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14 * |
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15 * Description: |
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16 * Prediction error block decoding functions. |
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17 * |
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18 */ |
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19 |
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20 |
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21 |
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22 /* |
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23 * Includes |
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24 */ |
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25 #include "h263dConfig.h" |
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26 #include "decmbdct.h" |
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27 #include "decblock.h" |
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28 #include "block.h" |
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29 #include "viddemux.h" |
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30 /* MVE */ |
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31 #include "MPEG4Transcoder.h" |
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32 |
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33 /* |
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34 * Globals |
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35 */ |
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36 |
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37 /* New chroma QP values in MQ mode. See Table T.1/H.263 */ |
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38 static const u_char dmdMQChromaTab[32] = {0,1,2,3,4,5,6,6,7,8,9,9,10,10, |
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39 11,11,12,12,12,13,13,13,14,14, |
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40 14,14,14,15,15,15,15,15}; |
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41 |
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42 |
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43 /* |
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44 * Global functions |
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45 */ |
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46 |
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47 |
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48 /* {{-output"dmdGetAndDecodeIMBBlocks.txt"}} */ |
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49 /* |
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50 * dmdGetAndDecodeIMBBlocks |
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51 * |
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52 * |
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53 * Parameters: |
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54 * param parameters needed in this function |
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55 * |
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56 * Function: |
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57 * This function gets the DCT coefficients of an INTRA macroblock |
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58 * from the bitstream, reconstructs the corresponding |
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59 * pixel-domain blocks and puts the blocks to the output frame. |
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60 * |
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61 * Returns: |
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62 * >= 0 the function was successful |
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63 * < 0 an error occured when accessing bit buffer |
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64 * |
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65 */ |
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66 |
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67 int dmdGetAndDecodeIMBBlocks( |
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68 dmdIParam_t *param, CMPEG4Transcoder *hTranscoder) |
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69 /* {{-output"dmdGetAndDecodeIMBBlocks.txt"}} */ |
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70 { |
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71 bibBuffer_t |
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72 *inBuffer; /* Input bit buffer instance */ |
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73 |
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74 TBool getDecodedFrame; |
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75 |
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76 |
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77 int |
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78 cWidth, /* Chrominance image width in pixels */ |
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79 block[64], /* Temporal 8 x 8 block of pixels */ |
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80 i, /* Loop variable */ |
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81 chrQuant, /* Quantization parameter for chroma */ |
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82 bitErrorIndication = 0, |
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83 /* Carries bit error indication information returned |
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84 by the video demultiplexer module */ |
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85 ret = 0; /* Used to check return values of function calls */ |
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86 |
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87 u_char |
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88 *yBlockInFrame; /* Points to top-left corner of the current block |
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89 inside the current frame */ |
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90 |
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91 inBuffer = param->inBuffer; |
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92 |
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93 getDecodedFrame = param->iGetDecodedFrame; |
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94 |
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95 |
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96 yBlockInFrame = param->yMBInFrame; |
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97 cWidth = param->yWidth / 2; |
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98 |
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99 |
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100 /* Luminance blocks */ |
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101 for (i=0; i<4; i++) |
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102 { |
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103 /* MVE */ |
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104 hTranscoder->BeginOneBlock(i); |
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105 |
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106 bitErrorIndication = 0; |
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107 |
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108 /* Get DCT coefficients */ |
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109 ret = vdxGetIntraDCTBlock(inBuffer, vdxIsYCoded(param->cbpy, i + 1), |
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110 block, &bitErrorIndication, param->fMQ, param->quant); |
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111 if ( ret < 0 ) |
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112 return DMD_ERR; |
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113 else if ( ret == VDX_OK_BUT_BIT_ERROR ) |
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114 goto corruptedMB; |
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115 |
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116 /* MVE */ |
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117 hTranscoder->AddOneBlockDataToMB(i, block); |
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118 if(getDecodedFrame || hTranscoder->NeedDecodedYUVFrame()) // we need the YUV frames. |
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119 { |
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120 |
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121 dblIdctAndDequant(block, param->quant, 1); |
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122 blcBlockToFrame(block, yBlockInFrame, param->yWidth); |
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123 yBlockInFrame += 8; |
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124 if (i & 1) |
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125 yBlockInFrame += 8 * param->yWidth - 16; |
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126 } |
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127 |
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128 } /* for (y blocks) */ |
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129 |
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130 /* MVE */ |
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131 hTranscoder->BeginOneBlock(4); |
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132 |
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133 /* Chrominance blocks (U) */ |
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134 bitErrorIndication = 0; |
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135 /* Find out the value of QP for chrominance block. */ |
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136 chrQuant = (param->fMQ)?dmdMQChromaTab[param->quant]:param->quant; |
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137 |
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138 /* Get DCT coefficients */ |
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139 ret = vdxGetIntraDCTBlock(inBuffer, vdxIsUCoded(param->cbpc), |
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140 block, &bitErrorIndication, param->fMQ, chrQuant); |
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141 if ( ret < 0 ) |
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142 return DMD_ERR; |
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143 else if ( ret == VDX_OK_BUT_BIT_ERROR ) |
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144 goto corruptedMB; |
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145 |
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146 /* MVE */ |
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147 hTranscoder->AddOneBlockDataToMB(4, block); |
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148 hTranscoder->BeginOneBlock(5); |
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149 if(getDecodedFrame || hTranscoder->NeedDecodedYUVFrame()) |
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150 { |
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151 dblIdctAndDequant(block, chrQuant, 1); |
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152 blcBlockToFrame(block, param->uBlockInFrame, cWidth); |
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153 } |
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154 |
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155 /* (V) */ |
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156 bitErrorIndication = 0; |
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157 /* Get DCT coefficients */ |
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158 ret = vdxGetIntraDCTBlock(inBuffer, vdxIsVCoded(param->cbpc), |
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159 block, &bitErrorIndication, param->fMQ, chrQuant); |
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160 if ( ret < 0 ) |
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161 return DMD_ERR; |
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162 else if ( ret == VDX_OK_BUT_BIT_ERROR ) |
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163 goto corruptedMB; |
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164 |
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165 /* MVE */ |
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166 hTranscoder->AddOneBlockDataToMB(5, block); |
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167 if ( hTranscoder->TranscodingOneMB(NULL) != DMD_OK ) |
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168 { |
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169 return DMD_ERR; |
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170 } |
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171 if(getDecodedFrame || hTranscoder->NeedDecodedYUVFrame()) |
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172 { |
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173 |
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174 dblIdctAndDequant(block, chrQuant, 1); |
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175 blcBlockToFrame(block, param->vBlockInFrame, cWidth); |
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176 |
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177 } |
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178 |
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179 return DMD_OK; |
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180 |
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181 corruptedMB: |
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182 |
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183 return DMD_BIT_ERR; |
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184 } |
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185 |
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186 |
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187 /* {{-output"dmdGetAndDecodePMBBlocks.txt"}} */ |
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188 /* |
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189 * dmdGetAndDecodePMBBlocks |
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190 * |
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191 * |
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192 * Parameters: |
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193 * param parameters needed in this function |
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194 * |
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195 * Function: |
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196 * This function gets the DCT coefficients of an INTER macroblock |
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197 * from the bitstream, reconstructs the corresponding |
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198 * pixel-domain blocks and adds the blocks to the prediction frame. |
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199 * |
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200 * Returns: |
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201 * >= 0 the function was successful |
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202 * < 0 an error occured when accessing bit buffer |
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203 * |
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204 */ |
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205 |
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206 int dmdGetAndDecodePMBBlocks( |
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207 dmdPParam_t *param, CMPEG4Transcoder *hTranscoder) |
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208 /* {{-output"dmdGetAndDecodePMBBlocks.txt"}} */ |
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209 { |
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210 bibBuffer_t |
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211 *inBuffer; /* Input bit buffer instance */ |
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212 |
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213 |
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214 TBool getDecodedFrame; |
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215 |
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216 int |
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217 yWidth, /* Luminance image width in pixels */ |
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218 block[64], /* Temporal 8 x 8 block of pixels */ |
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219 i, /* Loop variable */ |
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220 chrQuant, /* Quantization parameter for chroma */ |
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221 bitErrorIndication = 0, |
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222 /* Carries bit error indication information returned |
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223 by the video demultiplexer module */ |
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224 ret = 0; /* Used to check return values of function calls */ |
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225 |
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226 u_char |
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227 *yBlockInFrame; /* Points to top-left corner of the current block |
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228 inside the current frame */ |
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229 |
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230 inBuffer = param->inBuffer; |
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231 |
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232 |
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233 getDecodedFrame = param->iGetDecodedFrame; |
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234 |
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235 |
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236 yWidth = param->uvWidth * 2; |
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237 yBlockInFrame = param->currYMBInFrame; |
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238 |
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239 |
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240 int fEscapeCodeUsed = 0; |
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241 |
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242 /* Luminance blocks */ |
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243 for (i = 0; i < 4; i++) { |
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244 |
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245 hTranscoder->BeginOneBlock(i); |
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246 |
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247 if (vdxIsYCoded(param->cbpy, i + 1)) |
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248 { |
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249 /* Get DCT coefficients */ |
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250 ret = vdxGetDCTBlock(inBuffer, 0, 0, block, |
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251 &bitErrorIndication, 0, param->quant, &fEscapeCodeUsed); |
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252 if ( ret < 0 ) |
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253 return DMD_ERR; |
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254 else if ( ret == VDX_OK_BUT_BIT_ERROR ) |
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255 return DMD_BIT_ERR; |
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256 |
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257 /* MVE */ |
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258 hTranscoder->H263EscapeCoding(i, fEscapeCodeUsed); |
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259 hTranscoder->AddOneBlockDataToMB(i, block); |
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260 if(getDecodedFrame || hTranscoder->NeedDecodedYUVFrame()) |
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261 { |
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262 |
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263 dblIdctAndDequant(block, param->quant, 0); |
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264 |
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265 blcAddBlock(block, yBlockInFrame, |
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266 yWidth, param->mbPlace, |
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267 (u_char) param->fAdvancedPrediction, param->diffMB->block[i]); |
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268 } |
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269 } |
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270 |
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271 /* MVE */ |
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272 else |
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273 { |
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274 hTranscoder->H263EscapeCoding(i, fEscapeCodeUsed); |
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275 hTranscoder->AddOneBlockDataToMB(i, NULL); |
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276 } |
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277 |
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278 yBlockInFrame += 8; |
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279 if (i & 1) |
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280 yBlockInFrame += ((/*8 **/ yWidth<<3) - 16); |
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281 } /* for (y blocks) */ |
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282 |
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283 /* Find out the value of QP for chrominance block. */ |
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284 chrQuant = param->quant; |
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285 |
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286 hTranscoder->BeginOneBlock(4); |
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287 |
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288 /* Chrominance blocks (U) */ |
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289 if (vdxIsUCoded(param->cbpc)) |
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290 { |
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291 /* Get DCT coefficients */ |
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292 ret = vdxGetDCTBlock(inBuffer, 0, 0, block, |
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293 &bitErrorIndication, 0, param->quant, &fEscapeCodeUsed); |
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294 if ( ret < 0 ) |
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295 return DMD_ERR; |
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296 else if ( ret == VDX_OK_BUT_BIT_ERROR ) |
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297 return DMD_BIT_ERR; |
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298 |
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299 hTranscoder->H263EscapeCoding(4, fEscapeCodeUsed); |
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300 hTranscoder->AddOneBlockDataToMB(4, block); |
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301 if(getDecodedFrame || hTranscoder->NeedDecodedYUVFrame()) |
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302 { |
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303 |
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304 dblIdctAndDequant(block, chrQuant,0); |
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305 blcAddBlock(block, param->currUBlkInFrame, param->uvWidth, 0, 0, 0); |
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306 } |
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307 } |
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308 |
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309 else |
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310 { |
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311 hTranscoder->H263EscapeCoding(4, fEscapeCodeUsed); |
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312 hTranscoder->AddOneBlockDataToMB(4, NULL); |
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313 } |
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314 |
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315 hTranscoder->BeginOneBlock(5); |
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316 |
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317 /* (V) */ |
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318 if (vdxIsVCoded(param->cbpc)) |
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319 { |
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320 /* Get DCT coefficients */ |
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321 ret = vdxGetDCTBlock(inBuffer, 0, 0, block, |
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322 &bitErrorIndication, 0, param->quant, &fEscapeCodeUsed); |
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323 if ( ret < 0 ) |
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324 return DMD_ERR; |
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325 else if ( ret == VDX_OK_BUT_BIT_ERROR ) |
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326 return DMD_BIT_ERR; |
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327 |
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328 /* MVE */ |
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329 hTranscoder->H263EscapeCoding(5, fEscapeCodeUsed); |
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330 hTranscoder->AddOneBlockDataToMB(5, block); |
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331 if(getDecodedFrame || hTranscoder->NeedDecodedYUVFrame()) |
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332 { |
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333 |
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334 dblIdctAndDequant(block, chrQuant,0); |
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335 blcAddBlock(block, param->currVBlkInFrame, param->uvWidth, 0, 0, 0); |
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336 } |
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337 } |
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338 else |
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339 { |
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340 hTranscoder->H263EscapeCoding(5, fEscapeCodeUsed); |
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341 hTranscoder->AddOneBlockDataToMB(5, NULL); |
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342 } |
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343 |
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344 if ( hTranscoder->TranscodingOneMB(param) != TX_OK ) |
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345 { |
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346 return DMD_ERR; |
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347 } |
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348 return DMD_OK; |
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349 |
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350 } |
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351 |
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352 // End of File |
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