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1 /* |
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2 * Copyright (c) 2004-2008 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: MCC iLBC CodecInformation |
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15 * |
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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 FILES |
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22 #include "mmcccodecilbc.h" |
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23 #include "mmccinterfacelogs.h" |
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24 #include "mccuids.hrh" |
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25 |
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26 // LOCAL CONSTANTS AND MACROS |
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27 _LIT8( KIlbcMode20ms, "mode=20" ); |
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28 _LIT8( KIlbcMode30ms, "mode=30" ); |
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29 |
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30 const TUint8 KiLBCKAPayloadSize20ms = 38; |
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31 const TUint8 KiLBCKeepAlivePayload20ms[KiLBCKAPayloadSize20ms] = |
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32 { |
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33 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
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34 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
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35 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
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36 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01 |
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37 }; |
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38 |
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39 const TUint8 KiLBCKAPayloadSize30ms = 50; |
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40 const TUint8 KiLBCKeepAlivePayload30ms[KiLBCKAPayloadSize30ms] = |
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41 { |
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42 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
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43 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
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44 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
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45 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
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46 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01 |
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47 }; |
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48 |
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49 // Mask for 'allow all' bitrates. (defined in header) |
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50 const TUint KIlbcAllowAllBitrates = 0x00FF; |
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51 |
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52 // ============================= LOCAL FUNCTIONS =============================== |
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53 |
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54 |
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55 // ============================ MEMBER FUNCTIONS =============================== |
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56 |
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57 // ----------------------------------------------------------------------------- |
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58 // CMCCCodecILBC::CMCCCodecILBC |
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59 // default constructor |
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60 // ----------------------------------------------------------------------------- |
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61 // |
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62 CMCCCodecILBC::CMCCCodecILBC() : CMccCodecInformation() |
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63 { |
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64 iBitrateMask = KIlbcAllowAllBitrates; |
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65 } |
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66 |
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67 // ----------------------------------------------------------------------------- |
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68 // CMCCCodecILBC::ConstructL |
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69 // Symbian 2nd phase constructor can leave. |
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70 // ----------------------------------------------------------------------------- |
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71 // |
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72 void CMCCCodecILBC::ConstructL() |
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73 { |
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74 __INTERFACE( "CMCCCodecILBC::ConstructL()" ) |
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75 |
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76 SetSdpName( KILBCSdpName ); |
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77 iKeepAliveData.Copy( KiLBCKeepAlivePayload30ms ); |
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78 |
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79 SetSamplingFreq( KIlbcSampleRate ); |
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80 iHwFrameTime = KIlbcHwFrameTime; // default 30ms |
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81 SetBitrate( KIlbcBitrate30 ); // 30ms framesize used as default |
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82 EnableVAD( EFalse ); |
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83 SetPayloadType( KDefaultIlbcPT ); |
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84 SetMaxPTime( KIlbcMaxPTime ); |
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85 SetPTime( KIlbcPTime ); |
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86 |
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87 iFourCC = KMccFourCCIdILBC; |
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88 iCodecMode = ENothing; |
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89 |
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90 iPayloadFormatEncoder = KImplUidiLBCPayloadFormatEncode; |
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91 iPayloadFormatDecoder = KImplUidiLBCPayloadFormatDecode; |
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92 } |
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93 |
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94 |
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95 // ----------------------------------------------------------------------------- |
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96 // CMCCCodecILBC::NewL |
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97 // Static constructor. |
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98 // ----------------------------------------------------------------------------- |
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99 // |
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100 CMCCCodecILBC* CMCCCodecILBC::NewL() |
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101 { |
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102 CMCCCodecILBC* self = new (ELeave) CMCCCodecILBC; |
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103 CleanupStack::PushL( self ); |
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104 self->ConstructL(); |
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105 CleanupStack::Pop( self ); |
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106 return self; |
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107 } |
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108 |
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109 |
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110 // ----------------------------------------------------------------------------- |
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111 // CMCCCodecILBC::~CMCCCodecILBC |
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112 // Destructor |
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113 // ----------------------------------------------------------------------------- |
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114 // |
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115 CMCCCodecILBC::~CMCCCodecILBC() |
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116 { |
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117 __INTERFACE( "CMCCCodecILBC::~CMCCCodecILBC()" ) |
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118 } |
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119 |
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120 // ----------------------------------------------------------------------------- |
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121 // CMCCCodecILBC::EnableVAD |
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122 // Enable / Disable VAD |
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123 // ----------------------------------------------------------------------------- |
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124 // |
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125 TInt CMCCCodecILBC::EnableVAD( TBool aEnableVAD ) |
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126 { |
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127 iEnableVAD = aEnableVAD; |
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128 return KErrNone; |
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129 } |
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130 |
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131 |
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132 // ----------------------------------------------------------------------------- |
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133 // CMCCCodecILBC::SetBitrate |
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134 // Set Bitrate |
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135 // ----------------------------------------------------------------------------- |
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136 // |
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137 TInt CMCCCodecILBC::SetBitrate( TUint aBitrate ) |
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138 { |
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139 __INTERFACE_INT1( "CMCCCodecILBC::SetBitrate aBitrate", aBitrate ) |
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140 __INTERFACE_INT1( "CMCCCodecILBC::SetBitrate iBitrate", iBitrate ) |
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141 |
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142 TBool isValid( ETrue ); |
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143 |
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144 switch ( aBitrate ) |
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145 { |
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146 case KIlbcBitrate20: |
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147 iHwFrameTime = KIlbcPTime20; // 20ms frame |
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148 iKeepAliveData.Copy( KiLBCKeepAlivePayload20ms ); |
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149 break; |
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150 case KIlbcBitrate30: |
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151 iHwFrameTime = KIlbcPTime30; // 30ms frame |
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152 iKeepAliveData.Copy( KiLBCKeepAlivePayload30ms ); |
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153 break; |
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154 default: |
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155 isValid = EFalse; |
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156 break; |
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157 } |
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158 |
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159 if ( isValid ) |
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160 { |
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161 __INTERFACE( "CMCCCodecILBC::SetBitrate valid, adjusting" ) |
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162 |
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163 iBitrate = aBitrate; |
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164 AdjustCodec(); |
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165 return KErrNone; |
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166 } |
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167 else |
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168 { |
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169 __INTERFACE( "CMCCCodecILBC::SetBitrate KErrNotSupported" ) |
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170 |
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171 return KErrNotSupported; |
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172 } |
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173 } |
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174 |
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175 // ----------------------------------------------------------------------------- |
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176 // CMCCCodecILBC::SetSamplingFreq |
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177 // Set Sampling Frequency |
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178 // ----------------------------------------------------------------------------- |
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179 // |
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180 TInt CMCCCodecILBC::SetSamplingFreq( TUint32 aSamplingFreq ) |
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181 { |
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182 if ( KIlbcSampleRate == aSamplingFreq ) |
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183 { |
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184 iSamplingFreq = aSamplingFreq; |
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185 return KErrNone; |
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186 } |
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187 else |
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188 { |
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189 return KErrNotSupported; |
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190 } |
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191 } |
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192 |
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193 // ----------------------------------------------------------------------------- |
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194 // CMCCCodecILBC::SetSdpName |
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195 // Set SDP Name |
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196 // ----------------------------------------------------------------------------- |
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197 // |
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198 TInt CMCCCodecILBC::SetSdpName( const TDesC8& aSdpName ) |
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199 { |
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200 if ( !aSdpName.CompareF( KILBCSdpName ) ) |
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201 { |
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202 iSdpName.Copy( aSdpName ); |
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203 } |
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204 else |
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205 { |
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206 return KErrNotSupported; |
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207 } |
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208 |
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209 return KErrNone; |
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210 } |
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211 |
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212 // ----------------------------------------------------------------------------- |
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213 // CMCCCodecILBC::SetPayloadType |
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214 // Set PayloadType |
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215 // ----------------------------------------------------------------------------- |
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216 // |
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217 TInt CMCCCodecILBC::SetPayloadType( TUint8 aPayloadType ) |
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218 { |
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219 if ( aPayloadType > KMaxPayloadType || aPayloadType < KMinDynamicPT ) |
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220 { |
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221 return KErrArgument; |
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222 } |
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223 else |
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224 { |
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225 iPayloadType = aPayloadType; |
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226 return KErrNone; |
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227 } |
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228 } |
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229 |
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230 // ----------------------------------------------------------------------------- |
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231 // CMCCCodecILBC::SetCodecMode |
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232 // Set Codec Mode |
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233 // ----------------------------------------------------------------------------- |
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234 // |
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235 TInt CMCCCodecILBC::SetCodecMode( TCodecMode aCodecMode ) |
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236 { |
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237 __INTERFACE_INT1( "CMCCCodecILBC::SetCodecMode aCodecMode", aCodecMode ) |
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238 |
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239 if ( ENothing == aCodecMode ) |
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240 { |
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241 iCodecMode = aCodecMode; |
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242 return KErrNone; |
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243 } |
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244 else |
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245 { |
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246 return KErrNotSupported; |
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247 } |
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248 } |
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249 |
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250 // ----------------------------------------------------------------------------- |
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251 // CMCCCodecILBC::CreateFmtpAttrListL |
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252 // Builds fmtp line according to current parameters. |
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253 // ----------------------------------------------------------------------------- |
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254 // |
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255 void CMCCCodecILBC::CreateFmtpAttrListL() |
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256 { |
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257 HBufC8* buf = HBufC8::NewLC( KMaxFmtpLen ); |
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258 TPtr8 bufPtr = buf->Des(); |
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259 |
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260 // By default there is no need to construct the 30ms fmtp line. So |
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261 // let's do it only in 20ms mode. |
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262 if ( KIlbcBitrate20 == iBitrate ) |
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263 { |
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264 bufPtr.Append( KIlbcMode20ms ); |
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265 } |
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266 else |
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267 { |
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268 bufPtr.Append( KNullDesC8 ); |
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269 } |
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270 |
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271 // Update iFmtpAttr |
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272 SetFmtpAttrL( bufPtr, EFalse ); |
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273 |
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274 CleanupStack::PopAndDestroy( buf ); |
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275 } |
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276 |
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277 // ----------------------------------------------------------------------------- |
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278 // CMCCCodecILBC::ParseFmtpAttrL |
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279 // Parse FMTP attribute |
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280 // ----------------------------------------------------------------------------- |
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281 // |
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282 TBool CMCCCodecILBC::ParseFmtpAttrL( const TDesC8& aFmtp ) |
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283 { |
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284 __INTERFACE( "CMCCCodecILBC::ParseFmtpAttrL, Entry" ) |
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285 |
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286 TPtrC8 curToken; |
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287 TLex8 fmtpLex( aFmtp ); |
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288 TBool updated( EFalse ); |
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289 |
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290 curToken.Set( fmtpLex.NextToken() ); |
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291 |
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292 // Set bitrate according to mode indicated with fmtp attribute |
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293 if ( !curToken.Length() || |
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294 KErrNotFound != curToken.Find( KIlbcMode30ms ) ) |
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295 { |
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296 SetBitrate( KIlbcBitrate30 ); |
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297 AdjustCodec(); |
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298 updated = ETrue; |
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299 } |
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300 else if ( KErrNotFound != curToken.Find( KIlbcMode20ms ) ) |
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301 { |
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302 SetBitrate( KIlbcBitrate20 ); |
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303 AdjustCodec(); |
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304 updated = ETrue; |
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305 } |
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306 else |
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307 { |
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308 __INTERFACE( "CMCCCodecILBC::ParseFmtpAttrL, KErrArgument" ) |
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309 |
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310 User::Leave( KErrArgument ); |
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311 } |
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312 |
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313 __INTERFACE_INT1( "CMCCCodecILBC::ParseFmtpAttrL, Exit updated", updated ) |
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314 |
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315 return updated; |
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316 } |
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317 |
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318 // ----------------------------------------------------------------------------- |
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319 // CMCCCodecILBC::GetFmtpL |
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320 // Gets the fmtp attribute |
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321 // ----------------------------------------------------------------------------- |
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322 // |
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323 TDesC8& CMCCCodecILBC::GetFmtpL() |
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324 { |
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325 __INTERFACE( "CMCCCodecILBC::GetFmtpL" ) |
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326 |
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327 if ( iFmtpAttr ) |
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328 { |
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329 delete iFmtpAttr; |
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330 iFmtpAttr = NULL; |
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331 } |
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332 |
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333 CreateFmtpAttrListL(); |
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334 |
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335 __INTERFACE( "CMCCCodecILBC::GetFmtpL, exit" ) |
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336 |
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337 return *iFmtpAttr; |
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338 } |
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339 |
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340 // ----------------------------------------------------------------------------- |
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341 // CMCCCodecILBC::SetPTime |
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342 // Sets the packet time |
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343 // ----------------------------------------------------------------------------- |
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344 // |
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345 TInt CMCCCodecILBC::SetPTime( TUint aPTime ) |
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346 { |
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347 __INTERFACE_INT1( "CMCCCodecILBC::SetPTime, Entry aPTime", aPTime ) |
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348 __INTERFACE_INT1( "CMCCCodecILBC::SetPTime, Entry iPTime", iPTime ) |
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349 |
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350 if ( iMaxPTime < aPTime ) |
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351 { |
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352 __INTERFACE( "CMCCCodecILBC::SetPTime, KErrArgument 1" ) |
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353 |
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354 return KErrArgument; |
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355 } |
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356 else if( KMinPtime > aPTime ) |
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357 { |
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358 __INTERFACE( "CMCCCodecILBC::SetPTime, KErrArgument 2" ) |
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359 |
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360 return KErrArgument; |
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361 } |
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362 else |
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363 { |
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364 if ( aPTime == KIlbcPTime20 || aPTime == KIlbcPTime30 ) |
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365 { |
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366 iPTime = aPTime; |
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367 |
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368 // Do not allow ptime vs. bitrate mismatch |
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369 AdjustCodec(); |
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370 |
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371 return KErrNone; |
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372 } |
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373 else if( ( KIlbcBitrate20 == iBitrate ) && |
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374 ( aPTime % KDefaultPtime == 0 ) ) |
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375 { |
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376 iPTime = aPTime; |
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377 TInt mod = iMaxPTime % KDefaultPtime; |
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378 while( mod != 0 ) |
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379 { |
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380 iMaxPTime = iMaxPTime - KMinPtime; |
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381 mod = iMaxPTime % KDefaultPtime; |
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382 } |
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383 |
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384 if( iMaxPTime == 0 ) |
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385 { |
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386 iMaxPTime = KMaxPtime; |
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387 } |
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388 |
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389 return KErrNone; |
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390 } |
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391 else if( ( KIlbcBitrate30 == iBitrate ) && |
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392 ( aPTime % KIlbcPTime30 == 0 ) ) |
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393 { |
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394 iPTime = aPTime; |
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395 TInt mod = iMaxPTime % KIlbcPTime30; |
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396 while( mod != 0 ) |
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397 { |
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398 iMaxPTime = iMaxPTime - KMinPtime; |
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399 mod = iMaxPTime % KIlbcPTime30; |
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400 } |
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401 |
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402 if( iMaxPTime == 0 ) |
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403 { |
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404 iMaxPTime = KIlbcMaxPTime30; |
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405 } |
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406 |
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407 return KErrNone; |
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408 } |
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409 else |
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410 { |
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411 __INTERFACE( "CMCCCodecILBC::SetPTime, KErrArgument 3" ) |
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412 |
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413 return KErrArgument; |
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414 } |
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415 } |
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416 } |
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417 |
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418 // ----------------------------------------------------------------------------- |
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419 // CMCCCodecILBC::SetMaxPTime |
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420 // Set Max PTime |
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421 // ----------------------------------------------------------------------------- |
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422 // |
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423 TInt CMCCCodecILBC::SetMaxPTime( TUint aMaxPTime ) |
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424 { |
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425 __INTERFACE_INT1( "CMCCCodecILBC::SetMaxPTime, Entry aMaxPTime", aMaxPTime ) |
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426 __INTERFACE_INT1( "CMCCCodecILBC::SetMaxPTime, Entry iMaxPTime", iMaxPTime ) |
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427 |
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428 if ( aMaxPTime < iPTime ) |
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429 { |
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430 __INTERFACE( "CMCCCodecILBC::SetMaxPTime, KErrArgument 1" ) |
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431 |
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432 return KErrArgument; |
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433 } |
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434 else |
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435 { |
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436 if ( aMaxPTime && ( KIlbcBitrate20 == iBitrate ) && |
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437 ( aMaxPTime % KDefaultPtime == 0 ) ) |
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438 { |
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439 if ( KMaxPtime < aMaxPTime ) |
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440 { |
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441 __INTERFACE( "CMCCCodecILBC::SetMaxPTime, KErrArgument 2" ) |
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442 |
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443 return KErrArgument; |
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444 } |
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445 else |
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446 { |
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447 iMaxPTime = aMaxPTime; |
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448 return KErrNone; |
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449 } |
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450 } |
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451 else if ( aMaxPTime && ( KIlbcBitrate30 == iBitrate ) && |
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452 ( aMaxPTime % KIlbcPTime30 == 0 ) ) |
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453 { |
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454 if ( KIlbcMaxPTime30 < aMaxPTime ) |
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455 { |
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456 __INTERFACE( "CMCCCodecILBC::SetMaxPTime, KErrArgument 3" ) |
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457 |
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458 return KErrArgument; |
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459 } |
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460 else |
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461 { |
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462 iMaxPTime = aMaxPTime; |
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463 return KErrNone; |
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464 } |
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465 } |
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466 else |
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467 { |
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468 __INTERFACE( "CMCCCodecILBC::SetMaxPTime, KErrArgument 4" ) |
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469 |
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470 return KErrArgument; |
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471 } |
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472 } |
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473 } |
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474 |
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475 // ----------------------------------------------------------------------------- |
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476 // CMCCCodecILBC::CloneDefaultsL |
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477 // Make a default setting clone from this iLBC codec |
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478 // ----------------------------------------------------------------------------- |
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479 // |
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480 CMccCodecInformation* CMCCCodecILBC::CloneDefaultsL() |
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481 { |
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482 return CMCCCodecILBC::NewL(); |
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483 }; |
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484 |
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485 // ----------------------------------------------------------------------------- |
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486 // CMCCCodecILBC::CloneDetailedL |
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487 // Make a detailed clone from this iLBC codec |
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488 // ----------------------------------------------------------------------------- |
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489 // |
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490 CMccCodecInformation* CMCCCodecILBC::CloneDetailedL() |
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491 { |
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492 CMCCCodecILBC* newCodec = CMCCCodecILBC::NewL(); |
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493 CleanupStack::PushL( newCodec ); |
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494 newCodec->SetBitrate( this->Bitrate() ); |
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495 newCodec->SetCodecMode( this->CodecMode() ); |
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496 newCodec->SetMaxPTime( this->MaxPTime() ); |
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497 newCodec->SetPayloadType( this->PayloadType() ); |
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498 newCodec->SetPTime( this->PTime() ); |
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499 newCodec->SetSamplingFreq( this->SamplingFreq() ); |
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500 newCodec->SetSdpName( this->SdpName() ); |
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501 |
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502 TDesC8& fmtp( this->GetFmtpL() ); |
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503 if ( fmtp.Length() ) |
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504 { |
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505 newCodec->ParseFmtpAttrL( this->GetFmtpL() ); |
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506 } |
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507 |
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508 CleanupStack::Pop( newCodec ); |
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509 return newCodec; |
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510 }; |
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511 |
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512 // ----------------------------------------------------------------------------- |
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513 // CMCCCodecILBC::RequireSignalling |
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514 // ----------------------------------------------------------------------------- |
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515 // |
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516 TBool CMCCCodecILBC::RequireSignalling( |
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517 const CMccCodecInformation& aCandidate ) const |
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518 { |
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519 __INTERFACE( "CMCCCodecILBC::RequireSignalling" ) |
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520 TBool ret = EFalse; |
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521 |
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522 if ( iPTime != aCandidate.PTime() ) |
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523 { |
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524 __INTERFACE( "CMCCCodecILBC::RequireSignalling, PTime changed" ) |
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525 ret = ETrue; |
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526 } |
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527 |
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528 if ( iMaxPTime != aCandidate.MaxPTime() ) |
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529 { |
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530 __INTERFACE( "CMCCCodecILBC::RequireSignalling, MaxPTime changed" ) |
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531 ret = ETrue; |
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532 } |
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533 |
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534 if ( iPayloadType != aCandidate.PayloadType() ) |
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535 { |
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536 __INTERFACE( "CMCCCodecILBC::RequireSignalling, PayloadType changed" ) |
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537 ret = ETrue; |
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538 } |
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539 |
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540 if ( iBitrate != aCandidate.Bitrate() ) |
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541 { |
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542 __INTERFACE( "CMCCCodecILBC::RequireSignalling, Bitrate changed" ) |
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543 ret = ETrue; |
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544 } |
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545 |
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546 if ( iCodecMode != aCandidate.CodecMode() ) |
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547 { |
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548 __INTERFACE( "CMCCCodecILBC::RequireSignalling, CodecMode changed" ) |
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549 ret = ETrue; |
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550 } |
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551 |
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552 __INTERFACE_INT1( "CMCCCodecILBC::RequireSignalling, exit with", ret ) |
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553 return ret; |
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554 } |
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555 |
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556 // ----------------------------------------------------------------------------- |
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557 // CMCCCodecILBC::SetComfortNoiseGeneration |
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558 // ----------------------------------------------------------------------------- |
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559 // |
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560 TInt CMCCCodecILBC::SetComfortNoiseGeneration( TUint8 aComfortNoisePT ) |
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561 { |
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562 iComfortNoiseGenerationPt = aComfortNoisePT; |
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563 return KErrNone; |
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564 } |
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565 |
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566 // ----------------------------------------------------------------------------- |
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567 // CMCCCodecILBC::SetAllowedBitrates |
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568 // ----------------------------------------------------------------------------- |
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569 // |
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570 |
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571 TInt CMCCCodecILBC::SetAllowedBitrates( TUint /*aBitrateMask*/ ) |
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572 { |
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573 // iLBC does not really need the concept of 'allowed' bitrates because |
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574 // the bitrate setting handles assertion for bitrate correctness. |
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575 return KErrNone; |
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576 } |
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577 |
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578 // ----------------------------------------------------------------------------- |
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579 // CMCCCodecILBC::AdjustCodec |
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580 // ----------------------------------------------------------------------------- |
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581 // |
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582 void CMCCCodecILBC::AdjustCodec() |
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583 { |
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584 __INTERFACE_INT1( "CMCCCodecILBC::AdjustCodec Entry iPTime", |
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585 iPTime ) |
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586 __INTERFACE_INT1( "CMCCCodecILBC::AdjustCodec Entry iHwFrameTime", |
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587 iHwFrameTime ) |
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588 |
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589 // If default ptime is in use, it is adjusted based on mode of the codec |
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590 if ( iPTime == KIlbcPTime20 || iPTime == KIlbcPTime30 || !iPTime ) |
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591 { |
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592 iPTime = ( KIlbcBitrate20 == iBitrate ) ? KIlbcPTime20 : KIlbcPTime30; |
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593 } |
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594 else if ( iPTime ) |
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595 { |
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596 __INTERFACE( "CMCCCodecILBC::AdjustCodec ptime to closest possible" ) |
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597 |
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598 // Default ptime is not in use, we must adjust it to closest possible |
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599 // according to current iHwFrameTime (bitrate specific). |
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600 TInt ptmul = (TInt) iPTime / (TInt) iHwFrameTime; |
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601 iPTime = ptmul * |
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602 ( ( KIlbcBitrate20 == iBitrate ) ? KIlbcPTime20 : KIlbcPTime30 ); |
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603 } |
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604 |
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605 __INTERFACE_INT1( "CMCCCodecILBC::AdjustCodec Exit iPTime", |
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606 iPTime ) |
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607 } |
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608 |
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609 // ========================== OTHER EXPORTED FUNCTIONS ========================= |
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610 |
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611 // End of File |