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1 /* |
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2 * Copyright (c) 2003 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: |
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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 // INCLUDES FILES |
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22 #include "mccvideojitterbuffer.h" |
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23 #include "mccvideosourcesinklogs.h" |
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24 #include "mccdef.h" |
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25 #include <CXPSPacketSink.h> |
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26 |
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27 // CONSTANTS |
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28 const TUint KMccMilliSecondInMicroSecs = 1000; |
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29 const TUint KMccMinInactivityTimeoutInMicroSecs = 1000000; // 1 sec |
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30 |
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31 #define MCC_CONVERT_TO_90KHZ_CLOCK( valInMicroSecs ) ( valInMicroSecs / 100 * 9 ) |
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32 |
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33 // --------------------------------------------------------------------------- |
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34 // CMccVideoPacket::NewLC |
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35 // --------------------------------------------------------------------------- |
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36 // |
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37 CMccVideoJitterBuffer::CMccVideoPacket* CMccVideoJitterBuffer::CMccVideoPacket::NewLC( |
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38 TUint aStreamId, |
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39 const TRtpRecvHeader& aHeaderInfo, |
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40 const TDesC8& aPayloadData, |
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41 TBool aImportantData ) |
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42 { |
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43 CMccVideoPacket* self = |
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44 new ( ELeave ) CMccVideoPacket( aStreamId, aHeaderInfo, aImportantData ); |
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45 CleanupStack::PushL( self ); |
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46 self->ConstructL( aPayloadData ); |
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47 return self; |
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48 } |
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49 |
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50 // --------------------------------------------------------------------------- |
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51 // CMccVideoPacket::~CMccVideoPacket |
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52 // --------------------------------------------------------------------------- |
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53 // |
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54 CMccVideoJitterBuffer::CMccVideoPacket::~CMccVideoPacket() |
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55 { |
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56 delete iPayloadData; |
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57 } |
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58 |
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59 // --------------------------------------------------------------------------- |
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60 // CMccVideoPacket::StreamId |
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61 // --------------------------------------------------------------------------- |
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62 // |
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63 TUint CMccVideoJitterBuffer::CMccVideoPacket::StreamId() |
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64 { |
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65 return iStreamId; |
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66 } |
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67 |
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68 // --------------------------------------------------------------------------- |
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69 // CMccVideoPacket::HeaderInfo |
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70 // --------------------------------------------------------------------------- |
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71 // |
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72 TRtpRecvHeader& CMccVideoJitterBuffer::CMccVideoPacket::HeaderInfo() |
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73 { |
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74 return iHeaderInfo; |
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75 } |
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76 |
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77 // --------------------------------------------------------------------------- |
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78 // CMccVideoPacket::PayloadData |
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79 // --------------------------------------------------------------------------- |
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80 // |
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81 const TDesC8& CMccVideoJitterBuffer::CMccVideoPacket::PayloadData() |
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82 { |
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83 return *iPayloadData; |
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84 } |
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85 |
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86 // --------------------------------------------------------------------------- |
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87 // CMccVideoPacket::CMccVideoPacket |
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88 // --------------------------------------------------------------------------- |
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89 // |
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90 CMccVideoJitterBuffer::CMccVideoPacket::CMccVideoPacket( |
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91 TUint aStreamId, |
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92 const TRtpRecvHeader& aHeaderInfo, |
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93 TBool aImportantData ) : |
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94 iStreamId( aStreamId ), |
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95 iHeaderInfo( aHeaderInfo ), |
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96 iImportantData( aImportantData ) |
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97 { |
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98 } |
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99 |
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100 // --------------------------------------------------------------------------- |
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101 // CMccVideoPacket::ConstructL |
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102 // --------------------------------------------------------------------------- |
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103 // |
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104 void CMccVideoJitterBuffer::CMccVideoPacket::ConstructL( const TDesC8& aPayloadData ) |
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105 { |
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106 iPayloadData = aPayloadData.AllocL(); |
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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 // CMccVideoJitterBuffer::InsertInSeqNumOrder |
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112 // --------------------------------------------------------------------------- |
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113 // |
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114 TInt CMccVideoJitterBuffer::CMccVideoPacket::InsertInSeqNumOrder( |
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115 const CMccVideoPacket& aPacket1, const CMccVideoPacket& aPacket2 ) |
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116 { |
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117 if ( aPacket1.iHeaderInfo.iSeqNum == aPacket2.iHeaderInfo.iSeqNum ) |
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118 { |
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119 return 0; |
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120 } |
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121 return ( aPacket1.iHeaderInfo.iSeqNum < aPacket2.iHeaderInfo.iSeqNum ) ? -1 : 1; |
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122 } |
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123 |
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124 // --------------------------------------------------------------------------- |
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125 // CMccVideoJitterBuffer::DroppingAllowed |
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126 // --------------------------------------------------------------------------- |
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127 // |
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128 TBool CMccVideoJitterBuffer::CMccVideoPacket::DroppingAllowed() const |
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129 { |
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130 return ( !iImportantData ); |
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131 } |
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132 |
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133 // --------------------------------------------------------------------------- |
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134 // CMccVideoJitterBuffer::CMccVideoJitterBuffer |
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135 // C++ default constructor can NOT contain any code, that might leave. |
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136 // --------------------------------------------------------------------------- |
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137 // |
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138 CMccVideoJitterBuffer::CMccVideoJitterBuffer( |
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139 MMccVideoJitterBufferObserver& aObserver, |
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140 CXPSPacketSink& aPacketSink, |
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141 TUint aInactivityTimeoutInMs ) : |
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142 CTimer( CActive::EPriorityStandard ), |
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143 iObserver( aObserver ), |
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144 iPacketSink( aPacketSink ), |
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145 iInactivityTimeoutInMicroSecs( aInactivityTimeoutInMs * KMccMilliSecondInMicroSecs ), |
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146 iPreviousTime( 0 ) |
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147 { |
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148 CActiveScheduler::Add( this ); |
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149 |
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150 iInactivityTimeoutInMicroSecs = aInactivityTimeoutInMs * KMccMilliSecondInMicroSecs; |
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151 |
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152 __V_SOURCESINK_CONTROLL_INT1( |
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153 "CMccVideoJitterBuffer::CMccVideoJitterBuffer, inactivity timeout:", |
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154 iInactivityTimeoutInMicroSecs ) |
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155 |
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156 if ( iInactivityTimeoutInMicroSecs < KMccMinInactivityTimeoutInMicroSecs ) |
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157 { |
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158 iInactivityTimeoutInMicroSecs = KMccMinInactivityTimeoutInMicroSecs; |
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159 __V_SOURCESINK_CONTROLL_INT1( |
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160 "CMccVideoJitterBuffer::CMccVideoJitterBuffer, inactivity timeout adjusted:", |
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161 iInactivityTimeoutInMicroSecs ) |
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162 } |
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163 } |
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164 |
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165 |
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166 // --------------------------------------------------------------------------- |
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167 // CMccVideoJitterBuffer::ConstructL |
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168 // Symbian 2nd phase constructor can leave. |
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169 // --------------------------------------------------------------------------- |
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170 // |
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171 void CMccVideoJitterBuffer::ConstructL() |
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172 { |
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173 __V_SOURCESINK_CONTROLL( "CMccVideoJitterBuffer::ConstructL" ) |
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174 |
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175 CTimer::ConstructL(); |
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176 |
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177 ConfigureL( KMccJitterBufferDefaultLowLimit, |
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178 KMccJitterBufferDefaultHighLimit, |
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179 KMccJitterBufferDefaultPlayThreshold, |
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180 KMccJitterBufferDefaultMaxSize, |
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181 KMccDefaultVideoFrameRate ); |
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182 |
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183 __V_SOURCESINK_CONTROLL( "CMccVideoJitterBuffer::ConstructL, exit" ) |
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184 } |
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185 |
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186 |
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187 // --------------------------------------------------------------------------- |
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188 // CMccVideoJitterBuffer::NewL |
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189 // Two-phased constructor. |
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190 // --------------------------------------------------------------------------- |
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191 // |
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192 CMccVideoJitterBuffer* CMccVideoJitterBuffer::NewL( |
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193 MMccVideoJitterBufferObserver& aObserver, |
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194 CXPSPacketSink& aPacketSink, |
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195 TUint aInactivityTimeoutInMs ) |
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196 { |
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197 CMccVideoJitterBuffer* self = CMccVideoJitterBuffer::NewLC( |
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198 aObserver, aPacketSink, aInactivityTimeoutInMs ); |
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199 CleanupStack::Pop( self ); |
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200 return self; |
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201 } |
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202 |
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203 |
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204 // --------------------------------------------------------------------------- |
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205 // CMccVideoJitterBuffer::NewLC |
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206 // Two-phased constructor. |
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207 // --------------------------------------------------------------------------- |
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208 // |
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209 CMccVideoJitterBuffer* CMccVideoJitterBuffer::NewLC( |
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210 MMccVideoJitterBufferObserver& aObserver, |
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211 CXPSPacketSink& aPacketSink, |
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212 TUint aInactivityTimeoutInMs ) |
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213 { |
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214 CMccVideoJitterBuffer* self = new( ELeave ) CMccVideoJitterBuffer( |
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215 aObserver, aPacketSink, aInactivityTimeoutInMs ); |
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216 CleanupStack::PushL( self ); |
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217 self->ConstructL(); |
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218 return self; |
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219 } |
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220 |
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221 |
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222 // --------------------------------------------------------------------------- |
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223 // CMccVideoJitterBuffer::~CMccVideoJitterBuffer |
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224 // Destructor. |
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225 // --------------------------------------------------------------------------- |
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226 // |
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227 CMccVideoJitterBuffer::~CMccVideoJitterBuffer() |
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228 { |
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229 __V_SOURCESINK_CONTROLL( "CMccVideoJitterBuffer::~CMccVideoJitterBuffer" ) |
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230 |
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231 iQueue.ResetAndDestroy(); |
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232 |
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233 __V_SOURCESINK_CONTROLL( "CMccVideoJitterBuffer::~CMccVideoJitterBuffer, exit" ) |
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234 } |
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235 |
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236 |
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237 // --------------------------------------------------------------------------- |
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238 // CMccVideoJitterBuffer::ConfigureL |
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239 // Jitterbuffer gathers data until defined play threshold is exceeded. |
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240 // After that, packets are posted with certain interval towards Helix. In case |
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241 // buffer is close to running out of data (low limit reached), posting interval |
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242 // is increased in order to increase data amount in buffer. Ideal situation |
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243 // is that buffer has all the time some data so that playback can be kept |
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244 // smooth. If high limit is reached, posting interval is tightened to avoid |
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245 // max limit reach. If max limit is anyhow reached, jitterbuffer makes room |
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246 // by just pushing some amount of oldest data towards Helix. |
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247 // |
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248 // --------------------------------------------------------------------------- |
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249 // |
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250 void CMccVideoJitterBuffer::ConfigureL( |
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251 TUint aLowLimitMs, |
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252 TUint aHighLimitMs, |
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253 TUint aPlayThresholdMs, |
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254 TUint aMaxSizeMs, |
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255 TUint aFrameRateFps ) |
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256 { |
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257 __V_SOURCESINK_CONTROLL_INT1( |
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258 "CMccVideoJitterBuffer::ConfigureL, framerate:", aFrameRateFps ) |
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259 __V_SOURCESINK_CONTROLL_INT1( "low limit:", aLowLimitMs ) |
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260 __V_SOURCESINK_CONTROLL_INT1( "high limit:", aHighLimitMs ) |
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261 __V_SOURCESINK_CONTROLL_INT1( "play threshold:", aPlayThresholdMs ) |
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262 __V_SOURCESINK_CONTROLL_INT1( "max size:", aMaxSizeMs ) |
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263 |
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264 __ASSERT_ALWAYS( aFrameRateFps > 0, User::Leave( KErrArgument ) ); |
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265 __ASSERT_ALWAYS( aLowLimitMs < aPlayThresholdMs, User::Leave( KErrArgument ) ); |
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266 __ASSERT_ALWAYS( aPlayThresholdMs < aHighLimitMs, User::Leave( KErrArgument ) ); |
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267 __ASSERT_ALWAYS( aHighLimitMs < aMaxSizeMs, User::Leave( KErrArgument ) ); |
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268 |
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269 iLowLimitMicroSecs = aLowLimitMs * KMccMilliSecondInMicroSecs; |
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270 iHighLimitMicroSecs = aHighLimitMs * KMccMilliSecondInMicroSecs; |
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271 iPlayThresholdMicroSecs = aPlayThresholdMs * KMccMilliSecondInMicroSecs; |
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272 iMaxSizeMicroSecs = aMaxSizeMs * KMccMilliSecondInMicroSecs; |
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273 iFrameRate = aFrameRateFps; |
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274 |
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275 const TInt KMccSecondInMicroSecs = 1000000; |
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276 |
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277 const TReal KMccLowLimitInterval = 1.4; |
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278 const TReal KMccHighLimitInterval = 0.7; |
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279 iNormalInterval = KMccSecondInMicroSecs / iFrameRate; |
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280 iLowLimitInterval = (TInt)( iNormalInterval.Int() * KMccLowLimitInterval ); |
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281 iHighLimitInterval = (TInt)( iNormalInterval.Int() * KMccHighLimitInterval ); |
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282 |
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283 iCurrentInterval = iNormalInterval; |
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284 |
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285 __V_SOURCESINK_CONTROLL_INT1( "normal interval:", iNormalInterval.Int() ) |
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286 __V_SOURCESINK_CONTROLL_INT1( "low limit interval:", iLowLimitInterval.Int() ) |
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287 __V_SOURCESINK_CONTROLL_INT1( "high limit interval:", iHighLimitInterval.Int() ) |
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288 } |
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289 |
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290 // --------------------------------------------------------------------------- |
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291 // CMccVideoJitterBuffer::EnqueueL |
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292 // Packets are posted towards Helix in receiving order, queuing could be |
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293 // seq num based but out of order packets are rare. |
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294 // --------------------------------------------------------------------------- |
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295 // |
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296 CMccVideoJitterBuffer::TMccPacketBufferingStatus CMccVideoJitterBuffer::EnqueueL( |
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297 TUint aStreamId, |
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298 const TRtpRecvHeader& aHeaderInfo, |
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299 const TDesC8& aPayloadData, |
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300 TBool aImportantData ) |
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301 { |
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302 CMccVideoPacket* packet = |
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303 CMccVideoPacket::NewLC( aStreamId, aHeaderInfo, aPayloadData, aImportantData ); |
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304 TLinearOrder<CMccVideoPacket> ordering( CMccVideoPacket::InsertInSeqNumOrder ); |
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305 iQueue.InsertInOrderAllowRepeatsL( packet, ordering ); |
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306 CleanupStack::Pop( packet ); |
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307 |
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308 UpdateFrameCount( *packet, ETrue ); |
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309 |
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310 if ( PlayThresholdExceeded() ) |
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311 { |
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312 if ( MaxSizeExceeded() ) |
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313 { |
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314 MakeRoom(); |
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315 } |
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316 |
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317 Start(); |
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318 } |
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319 |
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320 return PlayingStatus(); |
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321 } |
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322 |
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323 // --------------------------------------------------------------------------- |
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324 // CMccVideoJitterBuffer::Play |
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325 // --------------------------------------------------------------------------- |
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326 // |
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327 void CMccVideoJitterBuffer::Play() |
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328 { |
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329 if ( PlayThresholdExceeded() ) |
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330 { |
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331 Start(); |
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332 } |
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333 } |
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334 |
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335 // --------------------------------------------------------------------------- |
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336 // CMccVideoJitterBuffer::Pause |
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337 // --------------------------------------------------------------------------- |
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338 // |
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339 void CMccVideoJitterBuffer::Pause() |
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340 { |
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341 Cancel(); |
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342 } |
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343 |
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344 // --------------------------------------------------------------------------- |
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345 // CMccVideoJitterBuffer::PlayThresholdInMs |
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346 // --------------------------------------------------------------------------- |
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347 // |
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348 TInt CMccVideoJitterBuffer::PlayThresholdInMs() |
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349 { |
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350 const TInt KMccMilliSecondInMicroSecs = 1000; |
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351 return ( iPlayThresholdMicroSecs / KMccMilliSecondInMicroSecs ); |
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352 } |
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353 |
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354 // --------------------------------------------------------------------------- |
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355 // CMccVideoJitterBuffer::Start |
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356 // --------------------------------------------------------------------------- |
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357 // |
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358 void CMccVideoJitterBuffer::Start() |
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359 { |
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360 TTimeIntervalMicroSeconds32 newCurrentInterval = CheckCurrentInterval(); |
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361 if ( newCurrentInterval != iCurrentInterval ) |
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362 { |
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363 __V_SOURCESINK_CONTROLL_INT1( |
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364 "CMccVideoJitterBuffer::Start, new interval", newCurrentInterval.Int() ) |
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365 |
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366 Cancel(); |
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367 } |
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368 |
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369 if ( !IsActive() ) |
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370 { |
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371 iCurrentInterval = newCurrentInterval; |
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372 CTimer::HighRes( iCurrentInterval ); |
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373 } |
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374 } |
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375 |
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376 |
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377 // --------------------------------------------------------------------------- |
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378 // From class CActive. |
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379 // --------------------------------------------------------------------------- |
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380 // |
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381 void CMccVideoJitterBuffer::RunL() |
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382 { |
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383 __V_SOURCESINK_CONTROLL( "CMccVideoJitterBuffer::RunL" ) |
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384 |
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385 if ( PostFirstFrame() ) |
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386 { |
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387 Start(); |
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388 } |
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389 |
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390 __V_SOURCESINK_CONTROLL( "CMccVideoJitterBuffer::RunL, exit" ) |
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391 } |
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392 |
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393 // --------------------------------------------------------------------------- |
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394 // CMccVideoJitterBuffer::PlayThresholdExceeded |
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395 // --------------------------------------------------------------------------- |
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396 // |
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397 TBool CMccVideoJitterBuffer::PlayThresholdExceeded() |
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398 { |
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399 if ( !iPlayThresholdExeeced && |
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400 ( iFrameCount * iNormalInterval.Int() >= iPlayThresholdMicroSecs ) ) |
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401 { |
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402 iPlayThresholdExeeced = ETrue; |
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403 } |
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404 return iPlayThresholdExeeced; |
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405 } |
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406 |
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407 // --------------------------------------------------------------------------- |
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408 // CMccVideoJitterBuffer::CheckCurrentInterval |
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409 // --------------------------------------------------------------------------- |
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410 // |
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411 TTimeIntervalMicroSeconds32 CMccVideoJitterBuffer::CheckCurrentInterval() |
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412 { |
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413 TTimeIntervalMicroSeconds32 interval( iNormalInterval ); |
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414 TUint32 dataAmountInMicroSecs( iFrameCount * iNormalInterval.Int() ); |
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415 if ( iQueue.Count() == 0 || dataAmountInMicroSecs < iLowLimitMicroSecs ) |
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416 { |
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417 interval = iLowLimitInterval; |
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418 } |
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419 else if ( dataAmountInMicroSecs > iHighLimitMicroSecs ) |
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420 { |
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421 interval = iHighLimitInterval; |
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422 } |
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423 else if ( iCurrentInterval == iLowLimitInterval && |
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424 dataAmountInMicroSecs < iPlayThresholdMicroSecs ) |
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425 { |
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426 // If on low interval, normalize only once at normal level, otherwise |
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427 // low limit might be reached shortly again. |
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428 interval = iLowLimitInterval; |
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429 } |
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430 else |
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431 { |
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432 } |
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433 return interval; |
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434 } |
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435 |
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436 // --------------------------------------------------------------------------- |
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437 // CMccVideoJitterBuffer::UpdateFrameCount |
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438 // --------------------------------------------------------------------------- |
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439 // |
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440 void CMccVideoJitterBuffer::UpdateFrameCount( CMccVideoPacket& aPacket, TBool aIsAdded ) |
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441 { |
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442 if ( aPacket.HeaderInfo().iMarker != 0 ) |
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443 { |
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444 if ( aIsAdded ) |
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445 { |
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446 iFrameCount++; |
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447 } |
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448 else if ( iFrameCount > 0 ) |
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449 { |
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450 iFrameCount--; |
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451 } |
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452 else |
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453 { |
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454 // NOP |
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455 } |
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456 |
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457 __V_SOURCESINK_CONTROLL_INT1( |
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458 "CMccVideoJitterBuffer::UpdateFrameCount, count", iFrameCount ) |
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459 } |
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460 } |
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461 |
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462 // --------------------------------------------------------------------------- |
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463 // CMccVideoJitterBuffer::PostFirstFrame |
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464 // --------------------------------------------------------------------------- |
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465 // |
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466 TBool CMccVideoJitterBuffer::PostFirstFrame() |
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467 { |
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468 TBool posted( EFalse ); |
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469 TInt frameEndIndex( KErrNotFound ); |
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470 TUint32 frameTimeStamp( 0 ); |
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471 for ( TInt i = 0; i < iQueue.Count() && !posted; i++ ) |
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472 { |
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473 CMccVideoPacket* packet = iQueue[ i ]; |
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474 |
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475 if ( frameEndIndex != KErrNotFound ) |
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476 { |
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477 TRtpRecvHeader& recvHeader = packet->HeaderInfo(); |
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478 if ( recvHeader.iTimestamp != frameTimeStamp && packet->DroppingAllowed() ) |
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479 { |
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480 // Timestamp mismatch, packet does not actually belong |
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481 // to this frame, drop it silently |
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482 __V_SOURCESINK_CONTROLL( |
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483 "CMccVideoJitterBuffer::PostBuffer, packet dropped due incorrect ts" ) |
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484 } |
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485 else |
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486 { |
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487 // Always modify timestamp to zero which causes that Helix |
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488 // lets packet go straight away to decoder. |
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489 DoRtpHeaderModify( recvHeader ); |
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490 |
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491 TInt ret = iPacketSink.Enqueue( |
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492 packet->StreamId(), recvHeader, packet->PayloadData() ); |
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493 |
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494 if ( ret != KErrNone ) |
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495 { |
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496 iObserver.ErrorOccured( ret ); |
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497 } |
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498 else |
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499 { |
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500 posted = ( frameEndIndex == i ); |
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501 } |
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502 } |
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503 } |
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504 else if ( packet->HeaderInfo().iMarker != 0 ) |
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505 { |
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506 // Full frame in queue, post all packets belonging to the frame |
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507 frameEndIndex = i; |
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508 frameTimeStamp = packet->HeaderInfo().iTimestamp; |
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509 i = -1; // Start again from beginning |
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510 } |
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511 else |
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512 { |
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513 } |
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514 } |
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515 |
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516 // Delete all posted packets |
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517 for ( TInt j = frameEndIndex; j >= 0; j-- ) |
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518 { |
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519 CMccVideoPacket* packet = iQueue[ j ]; |
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520 UpdateFrameCount( *packet, EFalse ); |
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521 delete packet; |
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522 iQueue.Remove( j ); |
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523 } |
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524 |
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525 return posted; |
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526 } |
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527 |
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528 // --------------------------------------------------------------------------- |
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529 // CMccVideoJitterBuffer::MakeRoom |
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530 // --------------------------------------------------------------------------- |
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531 // |
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532 void CMccVideoJitterBuffer::MakeRoom() |
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533 { |
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534 __V_SOURCESINK_CONTROLL( "CMccVideoJitterBuffer::MakeRoom" ) |
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535 |
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536 // Make room by pushing some amount from beginning of the queue |
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537 // towards helix. |
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538 TBool post = PostFirstFrame(); |
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539 while ( post ) |
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540 { |
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541 __V_SOURCESINK_CONTROLL( "CMccVideoJitterBuffer::MakeRoom, post" ) |
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542 |
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543 TTimeIntervalMicroSeconds32 interval = CheckCurrentInterval(); |
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544 if ( interval <= iHighLimitInterval ) |
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545 { |
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546 // Data amount still exceeds high limit |
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547 post = PostFirstFrame(); |
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548 } |
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549 else |
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550 { |
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551 post = EFalse; |
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552 } |
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553 } |
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554 |
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555 __V_SOURCESINK_CONTROLL( "CMccVideoJitterBuffer::MakeRoom, exit" ) |
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556 } |
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557 |
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558 // --------------------------------------------------------------------------- |
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559 // CMccVideoJitterBuffer::MaxSizeExceeded |
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560 // --------------------------------------------------------------------------- |
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561 // |
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562 TBool CMccVideoJitterBuffer::MaxSizeExceeded() |
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563 { |
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564 TUint32 dataAmountInMicroSecs( iFrameCount * iNormalInterval.Int() ); |
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565 return ( dataAmountInMicroSecs >= iMaxSizeMicroSecs ); |
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566 } |
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567 |
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568 // --------------------------------------------------------------------------- |
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569 // CMccVideoJitterBuffer::CheckPostingInactivity |
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570 // --------------------------------------------------------------------------- |
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571 // |
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572 void CMccVideoJitterBuffer::CheckPostingInactivity( |
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573 TInt64 aTimeFromPreviousFrame ) |
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574 { |
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575 if ( aTimeFromPreviousFrame > (TInt64)iInactivityTimeoutInMicroSecs ) |
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576 { |
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577 // If frames haven't been posted within inactivity time, next packet |
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578 // will cause again "playing started" status report |
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579 iPlaybackStarted = EFalse; |
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580 } |
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581 } |
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582 |
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583 // --------------------------------------------------------------------------- |
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584 // CMccVideoJitterBuffer::PlayingStatus |
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585 // --------------------------------------------------------------------------- |
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586 // |
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587 CMccVideoJitterBuffer::TMccPacketBufferingStatus CMccVideoJitterBuffer::PlayingStatus() |
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588 { |
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589 TMccPacketBufferingStatus bufferingStatus( EBuffering ); |
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590 if ( PlayThresholdExceeded() ) |
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591 { |
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592 if ( iPlaybackStarted ) |
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593 { |
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594 bufferingStatus = EPlaying; |
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595 } |
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596 else |
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597 { |
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598 bufferingStatus = EPlayingStarted; |
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599 iPlaybackStarted = ETrue; |
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600 } |
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601 } |
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602 return bufferingStatus; |
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603 } |
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604 |
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605 // --------------------------------------------------------------------------- |
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606 // CMccVideoJitterBuffer::DoRtpHeaderModify |
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607 // Always overwrite timestamps by using own real time clock. There's some |
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608 // implementations which do not use RTP timestamps correctly so this |
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609 // approach is for better interoperability. Also hide seqnum gaps from Helix. |
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610 // --------------------------------------------------------------------------- |
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611 // |
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612 void CMccVideoJitterBuffer::DoRtpHeaderModify( TRtpRecvHeader& aRecvHeader ) |
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613 { |
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614 if ( iPreviousTime.Int64() == 0 ) |
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615 { |
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616 iPreviousTime.HomeTime(); |
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617 iCurrentRealtimeTimestamp = aRecvHeader.iTimestamp; |
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618 } |
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619 else if ( aRecvHeader.iTimestamp != iPreviousReceivedTimestamp ) |
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620 { |
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621 TTime currentTime; |
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622 currentTime.HomeTime(); |
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623 TTimeIntervalMicroSeconds timeFromPreviousFrame = |
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624 currentTime.MicroSecondsFrom( iPreviousTime ); |
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625 iCurrentRealtimeTimestamp += |
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626 MCC_CONVERT_TO_90KHZ_CLOCK( timeFromPreviousFrame.Int64() ); |
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627 |
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628 CheckPostingInactivity( timeFromPreviousFrame.Int64() ); |
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629 |
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630 iPreviousTime = currentTime; |
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631 } |
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632 else |
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633 { |
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634 // NOP |
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635 } |
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636 |
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637 __V_SOURCESINK_CONTROLL_INT2( |
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638 "Timestamp mod, orig:", aRecvHeader.iTimestamp, " mod:", iCurrentRealtimeTimestamp ) |
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639 |
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640 iPreviousReceivedTimestamp = aRecvHeader.iTimestamp; |
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641 aRecvHeader.iTimestamp = iCurrentRealtimeTimestamp; |
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642 |
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643 if ( !iSeqNum ) |
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644 { |
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645 iSeqNum = aRecvHeader.iSeqNum; |
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646 } |
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647 else |
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648 { |
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649 aRecvHeader.iSeqNum = ++iSeqNum; |
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650 } |
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651 } |
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652 |
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653 // End of file |
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654 |