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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 * |
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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 #include "Mp3API.h" |
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22 #include "mpif.h" |
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23 #include "mpaud.h" |
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24 #include "mpheader.h" |
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25 #include "mp3tool.h" |
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26 |
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27 |
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28 |
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29 |
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30 // Exception handler for FLOATS |
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31 void handler(TExcType /*aType*/) |
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32 { |
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33 #ifndef __WINS__ |
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34 // CMp3Mix::WriteL(_L("Exception cought!!!")); |
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35 #endif |
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36 |
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37 } |
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38 |
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39 //const int16 Kmp3BufSize = 8; |
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40 |
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41 EXPORT_C CMp3Edit* CMp3Edit::NewL() |
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42 { |
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43 |
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44 CMp3Edit* self = new (ELeave) CMp3Edit(); |
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45 CleanupStack::PushL(self); |
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46 self->ConstructL(); |
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47 CleanupStack::Pop(self); |
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48 return self; |
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49 |
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50 } |
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51 |
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52 void CMp3Edit::ConstructL() |
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53 { |
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54 |
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55 } |
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56 |
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57 |
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58 EXPORT_C CMp3Edit::~CMp3Edit() |
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59 { |
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60 |
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61 } |
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62 |
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63 CMp3Edit::CMp3Edit() |
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64 { |
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65 |
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66 } |
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67 |
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68 |
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69 EXPORT_C uint32 |
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70 CMp3Edit::FileLengthInMs(TMpTransportHandle *tHandle, int32 fileSize) const |
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71 { |
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72 return MP_FileLengthInMs(tHandle, fileSize); |
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73 } |
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74 |
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75 EXPORT_C int32 |
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76 CMp3Edit::GetSeekOffset(TMpTransportHandle *tHandle, int32 seekPos) const |
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77 { |
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78 return MP_GetSeekOffset(tHandle, seekPos); |
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79 } |
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80 |
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81 EXPORT_C int32 |
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82 CMp3Edit::GetFrameTime(TMpTransportHandle *tHandle) const |
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83 { |
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84 return MP_GetFrameTime(tHandle); |
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85 } |
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86 |
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87 EXPORT_C void |
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88 CMp3Edit::InitTransport(TMpTransportHandle *tHandle) const |
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89 { |
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90 |
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91 mpInitTransport(tHandle); |
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92 } |
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93 |
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94 EXPORT_C int16 |
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95 CMp3Edit::SeekSync(TMpTransportHandle *tHandle, uint8 *syncBuf, |
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96 uint32 syncBufLen, int16 *readBytes, |
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97 int16 *frameBytes, int16 *headerBytes, |
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98 uint8 initMode) const |
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99 |
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100 { |
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101 |
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102 return MP_SeekSync(tHandle, syncBuf, |
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103 syncBufLen, readBytes, |
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104 frameBytes, headerBytes, |
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105 initMode); |
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106 } |
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107 |
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108 EXPORT_C int16 |
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109 CMp3Edit::FreeMode(TMpTransportHandle *tHandle, uint8 *syncBuf, |
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110 uint32 syncBufLen, int16 *readBytes, |
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111 int16 *frameBytes, int16 *headerBytes) const |
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112 { |
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113 return MP_FreeMode(tHandle, syncBuf, |
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114 syncBufLen, readBytes, |
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115 frameBytes, headerBytes); |
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116 } |
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117 |
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118 EXPORT_C int16 |
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119 CMp3Edit::EstimateBitrate(TMpTransportHandle *tHandle, uint8 isVbr) const |
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120 { |
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121 return MP_EstimateBitrate(tHandle, isVbr) ; |
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122 |
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123 } |
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124 |
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125 |
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126 |
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127 /* |
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128 * Saves modified 'global_gain' bitstream elements to specified layer I/II/III data buffer. |
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129 */ |
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130 EXPORT_C void |
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131 CMp3Edit::SetMPGlobalGains(TBitStream *bs, uint8 numGains, uint8 *globalGain, uint32 *gainPos) |
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132 { |
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133 int16 i; |
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134 |
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135 /*-- Store the gain element back to bitstream. --*/ |
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136 for(i = 0; i < numGains; i++) |
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137 { |
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138 BsSkipNBits(bs, gainPos[i]); |
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139 BsPutBits(bs, 8, globalGain[i]); |
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140 } |
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141 } |
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142 |
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143 |
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144 |
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145 EXPORT_C uint8 |
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146 CMp3Edit::GetMPGlobalGains(TBitStream *bs, TMpTransportHandle *tHandle, uint8 *globalGain, uint32 *gainPos) |
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147 { |
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148 uint32 bufBitOffset; |
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149 uint8 numGains, nVersion, nChannels; |
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150 |
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151 numGains = 0; |
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152 nVersion = (uint8) version(&tHandle->header); |
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153 nChannels =(uint8) channels(&tHandle->header); |
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154 |
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155 bufBitOffset = BsGetBitsRead(bs); |
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156 |
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157 /*-- Get the gain for each channel and granule. --*/ |
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158 switch(nVersion) |
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159 { |
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160 /*-- MPEG-1. --*/ |
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161 case 1: |
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162 switch(nChannels) |
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163 { |
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164 /* |
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165 * Mono frame consists of 2 granules. |
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166 */ |
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167 case 1: |
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168 numGains = 2; |
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169 |
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170 /*-- Left channel, granules 0 and granule 1. --*/ |
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171 BsSkipNBits(bs, 0x27); |
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172 gainPos[0] = BsGetBitsRead(bs) - bufBitOffset; |
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173 globalGain[0] = (uint8) BsGetBits(bs, 8); |
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174 BsSkipNBits(bs, 0x33); |
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175 gainPos[1] = 0x33; |
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176 globalGain[1] = (uint8) BsGetBits(bs, 8); |
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177 break; |
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178 |
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179 /* |
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180 * Two channels, 2 granules. |
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181 */ |
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182 case 2: |
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183 numGains = 4; |
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184 |
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185 /*-- Left and right channel, granule 0. --*/ |
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186 BsSkipNBits(bs, 0x29); |
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187 gainPos[0] = BsGetBitsRead(bs) - bufBitOffset; |
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188 globalGain[0] = (uint8) BsGetBits(bs, 8); |
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189 BsSkipNBits(bs, 0x33); |
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190 gainPos[1] = 0x33; |
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191 globalGain[1] = (uint8) BsGetBits(bs, 8); |
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192 |
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193 /*-- Left and right channel, granule 1. --*/ |
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194 BsSkipNBits(bs, 0x33); |
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195 gainPos[2] = 0x33; |
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196 globalGain[2] = (uint8) BsGetBits(bs, 8); |
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197 BsSkipNBits(bs, 0x33); |
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198 gainPos[3] = 0x33; |
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199 globalGain[3] = (uint8) BsGetBits(bs, 8); |
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200 break; |
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201 } |
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202 break; |
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203 |
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204 /*-- MPEG-2 LSF and MPEG-2.5. --*/ |
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205 default: |
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206 switch(nChannels) |
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207 { |
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208 /* |
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209 * Mono channel, 1 granule. |
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210 */ |
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211 case 1: |
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212 numGains = 1; |
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213 BsSkipNBits(bs, 0x1E); |
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214 gainPos[0] = BsGetBitsRead(bs) - bufBitOffset; |
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215 globalGain[0] = (uint8) BsGetBits(bs, 8); |
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216 break; |
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217 |
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218 /* |
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219 * Two channels, 1 granule. |
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220 */ |
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221 case 2: |
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222 numGains = 2; |
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223 BsSkipNBits(bs, 0x1F); |
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224 gainPos[0] = BsGetBitsRead(bs) - bufBitOffset; |
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225 globalGain[0] = (uint8) BsGetBits(bs, 8); |
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226 BsSkipNBits(bs, 0x37); |
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227 gainPos[1] = 0x37; |
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228 globalGain[1] = (uint8) BsGetBits(bs, 8); |
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229 break; |
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230 } |
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231 break; |
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232 } |
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233 |
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234 |
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235 return (numGains); |
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236 } |
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237 |
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238 EXPORT_C CMPAudDec* CMPAudDec::NewL() |
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239 { |
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240 CMPAudDec* self = new (ELeave) CMPAudDec(); |
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241 CleanupStack::PushL(self); |
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242 self->ConstructL(); |
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243 CleanupStack::Pop(self); |
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244 return self; |
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245 |
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246 |
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247 } |
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248 |
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249 CMPAudDec::CMPAudDec() |
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250 { |
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251 |
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252 |
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253 } |
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254 |
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255 EXPORT_C CMPAudDec::~CMPAudDec() |
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256 { |
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257 |
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258 |
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259 int16 i; |
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260 |
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261 /* --Scalefactors. --*/ |
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262 if (frame->scale_factors != 0) delete[] frame->scale_factors; |
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263 |
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264 /*-- Quantized samples. --*/ |
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265 if (frame->quant != 0) delete[] frame->quant; |
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266 |
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267 /*-- Huffman codebooks. --*/ |
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268 if (huffman != 0) delete[] huffman; |
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269 |
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270 /*-- Layer III side info. --*/ |
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271 if(side_info) |
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272 { |
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273 for(i = 0; i < MAX_CHANNELS; i++) |
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274 { |
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275 int16 j; |
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276 |
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277 if(side_info->ch_info[i]) |
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278 { |
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279 if (side_info->ch_info[i]->scale_fac != 0) delete side_info->ch_info[i]->scale_fac; |
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280 |
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281 for(j = 0; j < 2; j++) |
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282 if (side_info->ch_info[i]->gr_info[j] != 0) delete side_info->ch_info[i]->gr_info[j]; |
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283 } |
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284 if (side_info->ch_info[i] != 0) delete side_info->ch_info[i]; |
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285 } |
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286 |
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287 if (side_info->s_mode_long != 0) delete[] side_info->s_mode_long; |
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288 |
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289 for(i = 0; i < 3; i++) |
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290 if (side_info->s_mode_short[i] != 0) delete[] side_info->s_mode_short[i]; |
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291 |
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292 if (side_info != 0) delete side_info; |
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293 } |
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294 |
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295 if (frame != 0) delete frame; |
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296 if (bitReserv != 0) delete[] bitReserv; |
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297 |
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298 |
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299 |
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300 } |
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301 |
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302 void CMPAudDec::ConstructL() |
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303 { |
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304 |
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305 int16 i, j, groups; |
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306 |
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307 /*-- Create handle. --*/ |
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308 |
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309 /*-- Create bit reservoir buffer. --*/ |
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310 bitReserv = new (ELeave) uint8[4 * MAX_BITRESER_SIZE]; |
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311 ZERO_MEMORY(bitReserv, 4 * MAX_BITRESER_SIZE * sizeof(uint8)); |
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312 |
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313 BsInit(&br, bitReserv, 4 * MAX_BITRESER_SIZE); |
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314 |
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315 /*-- Create frame parameters. --*/ |
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316 frame = new (ELeave) TMPEG_Frame; |
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317 |
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318 /*-- Create side info parameters. --*/ |
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319 side_info = CIII_Side_Info::NewL(); |
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320 |
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321 /*-- Create scalefactors. --*/ |
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322 frame->scale_factors = new (ELeave) uint8[MAX_CHANNELS * SBLIMIT * 3]; |
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323 ZERO_MEMORY(frame->scale_factors, MAX_CHANNELS * SBLIMIT * 3 * sizeof(uint8)); |
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324 |
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325 |
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326 /*-- Create L3 side info. --*/ |
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327 for(i = 0; i < MAX_CHANNELS; i++) |
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328 { |
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329 |
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330 side_info->ch_info[i] = CIII_Channel_Info::NewL(); |
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331 |
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332 for(j = 0; j < 2; j++) |
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333 { |
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334 side_info->ch_info[i]->gr_info[j] = new (ELeave) TGranule_Info; |
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335 |
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336 } |
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337 } |
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338 |
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339 side_info->s_mode_long = new (ELeave) StereoMode[22]; |
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340 |
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341 ZERO_MEMORY(side_info->s_mode_long, 22 * sizeof(StereoMode)); |
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342 |
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343 for(i = 0; i < 3; i++) |
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344 { |
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345 side_info->s_mode_short[i] = new (ELeave) StereoMode[13]; //GET_CHUNK(13 * sizeof(StereoMode)); |
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346 ZERO_MEMORY(side_info->s_mode_short[i], 13 * sizeof(StereoMode)); |
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347 } |
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348 |
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349 /*-- Initialize scalefactors. --*/ |
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350 for(i = j = 0; i < MAX_CHANNELS; i++) |
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351 { |
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352 uint8 idx[] = {0, 23, 36, 49, 62, 85, 98, 111}; |
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353 |
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354 CIII_Scale_Factors *scale_fac; |
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355 |
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356 side_info->ch_info[i]->scale_fac = new (ELeave) CIII_Scale_Factors(); |
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357 |
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358 scale_fac = side_info->ch_info[i]->scale_fac; |
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359 |
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360 scale_fac->scalefac_long = frame->scale_factors + idx[j++]; |
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361 scale_fac->scalefac_short[0] = frame->scale_factors + idx[j++]; |
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362 scale_fac->scalefac_short[1] = frame->scale_factors + idx[j++]; |
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363 scale_fac->scalefac_short[2] = frame->scale_factors + idx[j++]; |
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364 } |
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365 |
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366 groups = MAX_MONO_SAMPLES * MAX_CHANNELS; |
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367 |
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368 /*-- Create buffer for quantized samples. --*/ |
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369 frame->quant = new (ELeave) int16[groups + 10];//(int16 *) GET_CHUNK((groups + 10) * sizeof(int16)); |
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370 |
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371 ZERO_MEMORY(frame->quant, (groups + 10) * sizeof(int16)); |
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372 |
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373 for(i = 0; i < MAX_CHANNELS; i++) |
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374 frame->ch_quant[i] = frame->quant + i * MAX_MONO_SAMPLES; |
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375 |
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376 /*-- Create Huffman handle. --*/ |
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377 huffman = new (ELeave) CHuffman[33];// *) GET_CHUNK(33 * sizeof(CHuffman)); |
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378 |
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379 /*-- Get the Huffman codebooks. --*/ |
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380 InitL3Huffman(huffman); |
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381 |
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382 } |
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383 |
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384 /*-- Initializes MPEG Layer I/II/III decoder handle. --*/ |
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385 EXPORT_C void |
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386 CMPAudDec::Init(TMpTransportHandle *aMpFileFormat) |
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387 { |
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388 mpFileFormat = aMpFileFormat; |
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389 |
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390 /*-- MPEG-1 --*/ |
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391 if(version(&mpFileFormat->header) == MPEG_AUDIO_ID) |
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392 { |
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393 side_info->lsf = FALSE; |
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394 side_info->max_gr = 2; |
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395 } |
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396 |
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397 /*-- MPEG-2 LSF or MPEG-2.5 --*/ |
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398 else |
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399 { |
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400 side_info->lsf = TRUE; |
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401 side_info->max_gr = 1; |
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402 } |
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403 |
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404 /*-- Get the scalefactor band related parameters. --*/ |
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405 III_SfbDataInit(side_info->sfbData, &mpFileFormat->header); |
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406 } |
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407 |
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408 |
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409 |