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1 /* |
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2 * Copyright (c) 2006 Nokia Corporation and/or its subsidiary(-ies). |
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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 "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 * |
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14 * Description: The functions in this module implements the specific behavior |
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15 * for the advanced audio converter class for configuration of |
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16 * hardware accelerated codec. |
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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 FILES |
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22 #include "AMRAudioPlayControllerDecoder.h" |
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23 #include "DebugMacros.h" |
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24 //#include <AmrDecHwDeviceTICIM.h> |
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25 #include <MmfPanicCodes.h> |
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26 |
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27 // The size of AMR header, header must include bits for determining frame length |
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28 const TInt KAmrFrameHeaderSize1 = 1; |
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29 |
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30 // Frame length table (number of frame bytes) |
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31 const TInt KAmrFrameLength[16] = {13,14,16,18,20,21,27,32,6,0,0,0,0,0,0,1}; |
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32 |
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33 // Maximum number of PCM samples in one AMR frame |
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34 const TInt KAmrSamplesPerFrame160 = 160; |
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35 |
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36 const TInt KAmrSampleRate8K = 8000; |
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37 const TInt KAmrChannels1 = 1; |
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38 |
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39 const TInt KAmrMaxFrameSize = 32; |
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40 const TUint KSizeOfInBuffer = 2*KAmrMaxFrameSize; |
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41 |
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42 class TAudioFrameInfo |
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43 { |
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44 public: |
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45 TInt iMode; // encoding mode |
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46 TInt iBitRate; // bitrate (bit/s) |
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47 TInt iSamplingRate; // sampling frequency (Hz) |
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48 TInt iChannels; // number of channels |
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49 TInt iFrameSize; // encoded size (bytes) |
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50 TInt iFrameSamples; // samples per frame |
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51 TInt iSamplingRateOut; // sampling frequency after conversion (Hz) |
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52 TInt iChannelsOut; // number of audio channels after conversion (1 or 2) |
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53 TInt iFrameSamplesOut; // decoded size after conversion (samples per frame) |
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54 TInt iPadding; // padding flag (TRUE or FALSE, TRUE if p slot exists) |
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55 TInt iId; // id of algorithm (1 MPEG-1, 0 MPEG-2) |
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56 }; |
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57 |
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58 // ============================ MEMBER FUNCTIONS =============================== |
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59 |
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60 // ----------------------------------------------------------------------------- |
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61 // C++ default constructor can NOT contain any code, that |
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62 // might leave. |
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63 // ----------------------------------------------------------------------------- |
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64 // |
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65 CAMRAudioPlayControllerDecoder::CAMRAudioPlayControllerDecoder() |
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66 : CAdvancedAudioDecoder(CActive::EPriorityStandard) |
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67 { |
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68 DP0(_L("CAMRAudioPlayControllerDecoder::CAMRAudioPlayControllerDecoder - Hardware Accelerated")); |
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69 iMaxFrameSize = KAmrMaxFrameSize; |
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70 iSizeOfInBuffer = KSizeOfInBuffer; |
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71 } |
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72 |
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73 // ----------------------------------------------------------------------------- |
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74 // CAMRAudioPlayControllerDecoder::ConstructL |
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75 // Symbian 2nd phase constructor can leave. |
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76 // ----------------------------------------------------------------------------- |
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77 // |
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78 void CAMRAudioPlayControllerDecoder::ConstructL() |
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79 { |
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80 DP1(_L("CAMRAudioPlayControllerDecoder::ConstructL"), this); |
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81 iFrameTable = CFrameTable::NewL(); |
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82 |
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83 RenderEnable(); |
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84 UnMarkPlayEnd(); |
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85 Enable(); |
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86 |
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87 CActiveScheduler::Add(this); |
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88 } |
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89 |
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90 // ----------------------------------------------------------------------------- |
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91 // C++ default constructor can NOT contain any code, that |
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92 // might leave. |
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93 // ----------------------------------------------------------------------------- |
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94 // |
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95 CAMRAudioPlayControllerDecoder* CAMRAudioPlayControllerDecoder::NewL() |
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96 { |
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97 DP0(_L("CAMRAudioPlayControllerDecoder::NewL")); |
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98 CAMRAudioPlayControllerDecoder* self = new(ELeave) CAMRAudioPlayControllerDecoder(); |
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99 CleanupStack::PushL(self); |
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100 self->ConstructL(); |
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101 CleanupStack::Pop(self); |
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102 return self; |
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103 } |
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104 |
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105 // Destructor |
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106 CAMRAudioPlayControllerDecoder::~CAMRAudioPlayControllerDecoder() |
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107 { |
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108 DP0(_L("CAMRAudioPlayControllerDecoder::~CAMRAudioPlayControllerDecoder")); |
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109 delete iFrameTable; |
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110 } |
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111 |
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112 TInt CAMRAudioPlayControllerDecoder::CodecConfig(RArray<TInt>& /*aConfigData*/) |
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113 { |
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114 TInt status = KErrNone; |
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115 iFrameTable->InitFrameTable(KAmrSampleRate8K, KAmrSamplesPerFrame160); |
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116 return status; |
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117 } |
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118 |
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119 // ----------------------------------------------------------------------------- |
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120 // CAMRAudioPlayControllerDecoder::ResetL |
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121 // Resets configuration data and configures the codec. |
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122 // ----------------------------------------------------------------------------- |
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123 // |
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124 void CAMRAudioPlayControllerDecoder::ResetL() |
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125 { |
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126 DP0(_L ("CAMRAudioPlayControllerDecoder::Reset - Enter")); |
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127 |
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128 delete[] iOutBuffer; |
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129 delete[] iInBuffer; |
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130 |
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131 iInBuffer = NULL; |
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132 iOutBuffer = NULL; |
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133 iInBufferCount = 0; |
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134 iOutBufferCount = 0; |
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135 iOutBufferPtr = NULL; |
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136 iOutFrameLength = KAmrMaxFrameSize; // since data is not decoded |
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137 iInBuffer = new (ELeave) TUint8[KSizeOfInBuffer]; |
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138 |
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139 iOutBuffer = new (ELeave) TUint8[iOutFrameLength]; |
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140 iOutBufferPtr = iOutBuffer; |
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141 |
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142 iAccLen = 0; |
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143 iEnabled = ETrue; |
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144 |
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145 DP0(_L ("CAMRAudioPlayControllerDecoder::Reset - Exit")); |
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146 } |
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147 |
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148 TCodecProcessResult CAMRAudioPlayControllerDecoder::ProcessL(CMMFBuffer& aSrc, CMMFBuffer& aDst) |
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149 { |
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150 DP0(_L ("CAMRAudioPlayControllerDecoder::ProcessL")); |
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151 return CAdvancedAudioDecoder::ProcessHwL(aSrc, aDst); |
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152 } |
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153 |
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154 TInt CAMRAudioPlayControllerDecoder::FrameLength(const TUint8* aBuf, TInt aBufLen, TInt& aFrameLength) |
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155 { |
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156 TInt stat = KErrNone; |
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157 TAudioFrameInfo info; |
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158 TInt len = FrameInfo(aBuf, aBufLen, info); |
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159 if (len > 0) |
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160 { |
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161 aFrameLength = len; |
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162 } |
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163 else |
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164 { |
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165 stat = KErrUnknown; |
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166 } |
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167 return stat; |
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168 } |
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169 |
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170 TInt CAMRAudioPlayControllerDecoder::FrameInfo( |
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171 const TUint8* aBuf, |
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172 TInt aBufLen, |
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173 TAudioFrameInfo& aInfo) |
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174 { |
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175 TInt length = 0; |
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176 aInfo.iBitRate = 0; |
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177 if (aBufLen >= KAmrFrameHeaderSize1) |
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178 { |
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179 // extract mode information |
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180 const TInt mode = (aBuf[0] & 0x78) >> 3; // 1st byte 0b.MODE... |
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181 // get length |
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182 length = KAmrFrameLength[mode]; |
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183 |
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184 // check start stuffing bits |
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185 if ((aBuf[0] & 0x83) != 0) |
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186 { |
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187 length = 0; // syntax error |
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188 } |
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189 |
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190 // SKIP CHECKING FOR STUFFING BITS |
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191 /* |
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192 // check end stuffing bits |
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193 if (length > 0 && aBufLen >= length) |
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194 { |
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195 TUint32 stuffBits = aBuf[length-1]; |
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196 stuffBits <<= (11 - KAmrStuffLength[mode]); |
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197 if ((stuffBits & 0x0000FF) != 0) |
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198 { |
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199 length = 0; // syntax error |
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200 } |
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201 } |
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202 */ |
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203 // update frame parameters |
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204 aInfo.iMode = mode; |
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205 aInfo.iBitRate = length * 400; |
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206 aInfo.iSamplingRate = KAmrSampleRate8K; |
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207 aInfo.iChannels = KAmrChannels1; |
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208 aInfo.iFrameSize = length; |
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209 aInfo.iFrameSamples = KAmrSamplesPerFrame160; |
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210 aInfo.iSamplingRateOut = aInfo.iSamplingRate; |
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211 aInfo.iChannelsOut = aInfo.iChannels; |
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212 aInfo.iFrameSamplesOut= aInfo.iFrameSamples; |
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213 } |
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214 return length; |
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215 } |
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216 |
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217 // ----------------------------------------------------------------------------- |
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218 // CAMRAudioControllerUtility::SeekSync |
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219 // ----------------------------------------------------------------------------- |
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220 // |
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221 TInt CAMRAudioPlayControllerDecoder::SeekSync(TUint8* aBuf, TInt aBufLen) |
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222 { |
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223 const TInt KMaxFrames = 3; // number of frames to check |
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224 const TInt KNotFound = aBufLen; // sync not found position |
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225 TAudioFrameInfo frameInfo; // frame parameters |
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226 TInt i = 0; |
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227 TInt syncPos = KNotFound; |
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228 TInt maxSeek = KMaxFrames; |
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229 const TUint8* endPtr = aBuf + aBufLen; |
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230 |
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231 // Seek a valid frame candidate byte by byte until a valid frame |
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232 // is found or all bytes have been checked. |
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233 while (aBuf < endPtr && syncPos == KNotFound) |
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234 { |
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235 TInt seekCount = 0; |
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236 const TUint8* framePtr = aBuf; |
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237 TInt frameBufLen = aBufLen; |
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238 syncPos = i; |
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239 // Check the validity of this frame candidate and the nearest next |
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240 // frames. If they are not OK, syncPos will be set to KNotFound. |
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241 while (framePtr < endPtr && syncPos != KNotFound && seekCount < maxSeek) |
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242 { |
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243 TInt length = FrameInfo(framePtr, frameBufLen, frameInfo); |
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244 if (frameBufLen >= KAmrFrameHeaderSize1 && length == 0) |
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245 { |
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246 syncPos = KNotFound; |
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247 } |
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248 framePtr += length; |
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249 frameBufLen -= length; |
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250 seekCount++; |
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251 } |
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252 aBuf++; aBufLen--; i++; |
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253 } |
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254 return syncPos; |
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255 } |
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256 |
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257 // ----------------------------------------------------------------------------- |
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258 // CAMRAudioPlayControllerDecoder::IsHwAccelerated |
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259 // Always return true when no soft codec is used. |
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260 // ----------------------------------------------------------------------------- |
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261 // |
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262 TBool CAMRAudioPlayControllerDecoder::IsHwAccelerated() |
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263 { |
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264 return ETrue; |
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265 } |
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266 |
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267 TInt CAMRAudioPlayControllerDecoder::CodecCmd(TCodecCmd /*aCmd*/) |
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268 { |
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269 return KErrNotSupported; |
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270 } |
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271 |
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272 |
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273 // End of file |