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1 /* |
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2 * Copyright (c) 2005 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 #ifndef CMCEAUDIOSDPCODEC_H |
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22 #define CMCEAUDIOSDPCODEC_H |
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23 |
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24 #include "mcemediasdpcodec.h" |
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25 |
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26 class CMceComAudioStream; |
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27 class CMceComAudioCodec; |
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28 |
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29 |
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30 #define MCE_SDP_STRING_AUDIOL()\ |
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31 SdpCodecStringPool::StringPoolL().StringF( \ |
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32 SdpCodecStringConstants::EMediaAudio,\ |
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33 SdpCodecStringPool::StringTableL() ) |
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34 |
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35 /** |
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36 * |
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37 * |
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38 * @lib |
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39 */ |
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40 class CMceAudioSdpCodec: public CMceMediaSdpCodec |
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41 { |
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42 |
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43 public://constructor and destructor |
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44 |
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45 /** |
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46 * Constructor |
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47 */ |
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48 static CMceAudioSdpCodec* NewL(); |
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49 |
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50 /** |
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51 * Destructor |
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52 */ |
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53 ~CMceAudioSdpCodec(); |
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54 |
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55 |
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56 public: //from CMceSdpCodec |
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57 |
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58 /** |
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59 * Returns ETrue, if media is encoded by this codec |
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60 * @return ETrue, if media is encoded by this codec |
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61 */ |
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62 TBool Encodes( const CMceComMediaStream& aStream ) const; |
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63 |
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64 |
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65 public: //from CMceMediaSdpCodec |
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66 |
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67 |
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68 /** |
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69 * Returns codecs |
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70 * @param aStream media stream |
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71 * @param return codecs |
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72 * @leave if stream type does not macth codecs |
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73 */ |
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74 const RPointerArray<CMceComCodec>& CodecsL( CMceComMediaStream& aStream ) const; |
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75 |
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76 /** |
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77 * Encodes rtpmap -attribute |
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78 * @param aCodec codec encoded to rtpmap |
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79 * @leave system wide error |
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80 */ |
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81 CSdpFmtAttributeField* EncodeRtpmapAttributeLC( CMceComCodec& aCodec ) const; |
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82 |
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83 /** |
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84 * Encodes media related attributes |
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85 * @param aCodec the codec |
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86 * @param aMediaLine media line |
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87 * @param aRtpmap rtpmap attribute |
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88 * @leave system wide error |
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89 */ |
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90 void EncodeMediaAttributesL( CMceComCodec& aCodec, |
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91 CSdpMediaField& aMediaLine, |
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92 CSdpFmtAttributeField& aRtpmap ) const; |
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93 |
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94 /** |
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95 * Decodes media related attributes |
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96 * @param aMediaLine media line |
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97 * @param aCodec the codec |
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98 * @leave system wide error |
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99 */ |
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100 void DecodeMediaAttributesL( CSdpMediaField& aMediaLine, |
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101 CMceComCodec& aCodec, |
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102 CSdpFmtAttributeField& aRtpmap ) const; |
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103 |
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104 /** |
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105 * Creates media stream based on sdp type |
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106 * @param aType the sdp type sendrecv, sendonly or receive only |
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107 * @return media stream |
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108 * @leave system wide error |
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109 */ |
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110 CMceComMediaStream* CreateStreamLC( TInt aType ) const; |
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111 |
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112 /** |
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113 * Updates media based on received offer |
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114 * @param aStream media stream |
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115 * @param aDirection the direction |
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116 * @leave system wide error |
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117 */ |
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118 void UpdateStreamL( CMceComMediaStream& aStream, TInt aDirection ) const; |
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119 |
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120 /** |
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121 * Creates codec based on rtpmap line |
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122 * @param aRtpmap rtpmap line |
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123 * @return codec or NULL, if not supported |
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124 * @leave system wide error |
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125 */ |
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126 CMceComCodec* CreateCodecLC( CSdpFmtAttributeField& aRtpmap ) const; |
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127 |
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128 /** |
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129 * Creates codec based on payload type |
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130 * @param aPayload payload |
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131 * @param aMediaLine media line |
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132 * @return codec or NULL, if not supported |
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133 * @leave system wide error |
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134 */ |
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135 CMceComCodec* CreateCodecLC( TUint aPayload, CSdpMediaField& aMediaLine ) const; |
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136 |
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137 /** |
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138 * Decodes session level media attributes |
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139 * @param aStream media stream |
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140 * @param aSdpDocument sdp document |
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141 * @return codec or NULL, if not supported |
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142 * @leave system wide error |
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143 */ |
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144 void DecodeSessionMediaAttributesL( CMceComMediaStream& aStream, |
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145 CSdpDocument& aSdpDocument ) const; |
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146 |
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147 private: |
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148 |
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149 |
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150 /** |
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151 * C++ Constructor |
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152 * @param aMedia media |
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153 */ |
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154 CMceAudioSdpCodec( RStringF aMedia ); |
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155 |
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156 /** |
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157 * Creates uplink audio stream with mic and rtp sink |
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158 * @return uplink audio stream |
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159 */ |
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160 CMceComAudioStream* CreateUplinkStreamL() const; |
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161 |
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162 /** |
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163 * Creates downlink audio stream with rtp source and speaker |
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164 * @return downlink audio stream |
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165 */ |
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166 CMceComAudioStream* CreateDownlinkStreamL() const; |
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167 |
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168 |
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169 }; |
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170 |
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171 |
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172 |
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173 #endif //CMCEAUDIOSDPCODEC_H |
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174 |