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1 // Copyright (c) 2003-2009 Nokia Corporation and/or its subsidiary(-ies). |
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2 // All rights reserved. |
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3 // This component and the accompanying materials are made available |
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4 // under the terms of "Eclipse Public License v1.0" |
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5 // which accompanies this distribution, and is available |
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6 // at the URL "http://www.eclipse.org/legal/epl-v10.html". |
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7 // |
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8 // Initial Contributors: |
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9 // Nokia Corporation - initial contribution. |
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10 // |
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11 // Contributors: |
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12 // |
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13 // Description: |
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14 // Implements the eSCO SAP class |
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15 // |
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16 // |
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17 |
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18 #include <bluetooth/logger.h> |
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19 #include <bt_sock.h> |
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20 #include <bluetooth/hci/hciframe.h> |
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21 |
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22 #include "SCOSAP.h" |
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23 #include "physicallinksmanager.h" |
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24 #include "physicallinks.h" |
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25 #include "hcifacade.h" |
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26 #include "linkutil.h" |
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27 #include "linkmuxer.h" |
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28 |
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29 #ifdef __FLOG_ACTIVE |
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30 _LIT8(KLogComponent, LOG_COMPONENT_LINKMGR); |
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31 #endif |
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32 |
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33 // ---------------------------------------------------------------------------- |
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34 // eSCO link |
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35 // ---------------------------------------------------------------------------- |
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36 CeSCOLink* CeSCOLink::NewLC(CPhysicalLinksManager& aConnectionMan, CPhysicalLink* aConnection) |
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37 { |
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38 CeSCOLink* s = new(ELeave) CeSCOLink(aConnectionMan, aConnection); |
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39 CleanupStack::PushL(s); |
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40 s->ConstructL(); |
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41 return s; |
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42 } |
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43 |
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44 |
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45 CeSCOLink* CeSCOLink::NewL(CPhysicalLinksManager& aLinksMan, CPhysicalLink* aPhysicalLink) |
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46 { |
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47 CeSCOLink* s = NewLC(aLinksMan, aPhysicalLink); |
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48 CleanupStack::Pop(); |
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49 return s; |
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50 } |
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51 |
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52 CeSCOLink::CeSCOLink(CPhysicalLinksManager& aLinksMan, CPhysicalLink* aPhysicalLink) |
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53 : CBTSynchronousLink(aLinksMan, aPhysicalLink, EeSCOLink) |
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54 { |
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55 iUserPacketTypes = TBTSyncPackets::ESyncAnyESCOPacket; |
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56 } |
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57 |
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58 void CeSCOLink::ConstructL() |
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59 { |
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60 CBTSynchronousLink::ConstructL(); |
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61 } |
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62 |
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63 CeSCOLink::~CeSCOLink() |
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64 { |
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65 } |
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66 |
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67 TInt CeSCOLink::GetOption(TUint aLevel, TUint aName, TDes8& aOption) const |
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68 { |
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69 if (aLevel != KSolBtESCO) |
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70 { |
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71 return KErrNotSupported; |
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72 } |
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73 |
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74 switch (aName) |
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75 { |
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76 case EeSCOExtOptions: |
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77 { |
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78 TBTeSCOLinkParams* options = reinterpret_cast<TBTeSCOLinkParams*>(const_cast<TUint8*>(aOption.Ptr())); |
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79 options->iBandwidth.iTransmit = iTransmitBandwidth; |
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80 options->iBandwidth.iReceive = iReceiveBandwidth; |
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81 options->iLatency = iMaxLatency; |
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82 options->iRetransmissionEffort = iRetransmissionEffort; |
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83 options->iCoding = iVoiceSettings; |
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84 return KErrNone; |
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85 } |
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86 |
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87 default: |
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88 return KErrNotSupported; |
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89 } |
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90 } |
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91 |
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92 TInt CeSCOLink::SAPSetOption(TUint aLevel, TUint aName, const TDesC8& aOption) |
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93 /** |
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94 Case ESyncSetUserPacketTypes: |
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95 Store the user specified pakcet types if at least one of the eSCO packet types is set |
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96 The packet types bitmask will be passed as a parameter of CPhysicalLink::Connect(const TBTSyncPackets aUserPacketTypes) |
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97 in DoActiveOpenL() |
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98 */ |
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99 { |
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100 switch (aLevel) |
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101 { |
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102 case KSolBtSCO: |
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103 switch (aName) |
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104 { |
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105 case ESyncUserPacketTypes: |
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106 { |
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107 TBTSyncPacketTypes optPacketTypes = *reinterpret_cast<const TBTSyncPacketTypes*>(aOption.Ptr()); |
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108 if (TBTSyncPackets::ESyncAnyESCOPacket & optPacketTypes) //make sure at least one packet type is supported |
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109 { |
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110 iUserPacketTypes = static_cast<TBTSyncPacketTypes>(optPacketTypes & (TBTSyncPackets::ESyncAnyESCOPacket));//Just eSCO packet types are stored |
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111 } |
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112 else |
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113 { |
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114 return KErrNotSupported; |
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115 } |
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116 |
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117 break; |
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118 } |
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119 |
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120 default: |
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121 return KErrNotSupported; |
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122 } |
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123 break; |
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124 |
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125 case KSolBtESCO: |
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126 switch (aName) |
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127 { |
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128 case EeSCOExtOptions: |
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129 { |
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130 TBTeSCOLinkParams options = *reinterpret_cast<const TBTeSCOLinkParams*>(aOption.Ptr()); |
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131 |
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132 iTransmitBandwidth = Max(options.iBandwidth.iTransmit, KMinESCOBandwidth); |
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133 iReceiveBandwidth = Max(options.iBandwidth.iReceive, KMinESCOBandwidth); |
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134 iMaxLatency = Max(options.iLatency, KMinESCOLatency); |
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135 iRetransmissionEffort = options.iRetransmissionEffort; |
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136 iVoiceSettings = options.iCoding; |
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137 |
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138 break; |
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139 } |
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140 |
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141 default: |
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142 return KErrNotSupported; |
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143 } |
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144 break; |
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145 |
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146 default: |
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147 return KErrNotSupported; |
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148 } |
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149 |
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150 return KErrNone; |
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151 } |
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152 |
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153 |
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154 TUint CeSCOLink::DoWrite(const TDesC8& aData, TUint /*aOptions*/, TSockAddr* /*aAddr*/) |
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155 /** |
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156 Actually do the write - has been checked for length |
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157 In future could write data on a specific SCO "subchannel" if we do that sort of thing |
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158 between devices - possibly then use aAddr or aOptions |
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159 **/ |
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160 { |
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161 TUint retVal = 0; |
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162 TInt err = KErrNone; |
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163 |
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164 #ifdef STACK_SCO_DATA |
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165 // Trim length of data if necessary |
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166 TPtrC8 data = aData.Left(CHctlSynchronousDataFrame::KHCTLMaxSynchronousDataSize); |
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167 if (iLinksMan.LinkManagerProtocol().LinkMuxer().CanWriteSCOData()) |
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168 { |
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169 // for now just try to write - if it fails then it doesnt matter - its |
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170 // a lot more *s*ynchronous than sticking it in a queue ;-) |
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171 LOG(_L("CSCOLink: Can write SCO data...")); |
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172 delete iOutboundSCOFrame; |
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173 iOutboundSCOFrame = NULL; |
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174 const CHCIFacade& facade = iLinksMan.HCIFacade(); |
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175 TRAP(err, iOutboundSCOFrame = facade.NewSynchronousDataFrameL(static_cast<TUint8>(data.Length()))); |
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176 if(iOutboundSCOFrame && err == KErrNone) |
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177 { |
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178 // got the frame - so go and use it |
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179 facade.FormatSCOData(*iOutboundSCOFrame, iHandle, data); |
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180 if (facade.WriteSCOData(*iOutboundSCOFrame) == KErrNone) |
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181 { |
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182 retVal = data.Length(); // we sent this many bytes |
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183 } |
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184 } |
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185 } |
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186 else |
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187 { |
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188 LOG(_L("CSCOLink: ERROR Cannot write SCO data.")); |
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189 Socket()->Error(((err == KErrNone) ? KErrInUse : err), MSocketNotify::EErrorSend); |
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190 } |
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191 #else |
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192 LOG(_L("CSCOLink: ERROR SCO data via stack not supported."))) |
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193 Socket()->Error(KErrNotSupported, MSocketNotify::EErrorSend); |
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194 #endif |
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195 return retVal; |
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196 } |
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197 |
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198 void CeSCOLink::PacketTypeChange(THCIErrorCode aErr, THCIConnHandle aConnH, TUint16 aNewPacket) |
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199 { |
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200 iState->PacketTypeChange(*this, aErr, aConnH, aNewPacket); |
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201 } |
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202 |
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203 TBool CeSCOLink::IsLinkProbablyPossible() |
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204 { |
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205 TUint minBandwidth = MinBandwidth(); |
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206 if ((iTransmitBandwidth < minBandwidth) || (iReceiveBandwidth < minBandwidth)) |
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207 { |
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208 return EFalse; |
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209 } |
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210 |
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211 TUint maxBandwidth = MaxBandwidth(); |
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212 if ((iTransmitBandwidth != KESCOBandwidthDontCare) && (iTransmitBandwidth > maxBandwidth)) |
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213 { |
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214 return EFalse; |
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215 } |
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216 |
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217 if ((iReceiveBandwidth != KESCOBandwidthDontCare) && (iReceiveBandwidth > maxBandwidth)) |
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218 { |
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219 return EFalse; |
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220 } |
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221 |
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222 if (iMaxLatency < KMinESCOLatency) |
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223 { |
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224 return EFalse; |
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225 } |
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226 |
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227 TBool airCodingOK = EFalse; |
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228 TBTFeatures airCodings = iLinksMan.LinkManagerProtocol().PacketsSupportedLocally(); |
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229 switch (iVoiceSettings & KAirCodingFormatBits) |
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230 { |
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231 case ECVSD: |
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232 airCodingOK = airCodings[ESupportedCVSDBit]; |
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233 break; |
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234 |
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235 case EuLawLog: |
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236 airCodingOK = airCodings[ESupportedu_lawLogBit]; |
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237 break; |
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238 |
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239 case EALawLog: |
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240 airCodingOK = airCodings[ESupportedA_lawLogBit]; |
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241 break; |
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242 |
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243 case ETransparentData: |
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244 airCodingOK = airCodings[ESupportedTransparentSCODataBit]; |
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245 break; |
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246 |
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247 default: |
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248 break; |
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249 } |
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250 |
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251 return airCodingOK; |
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252 } |
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253 |
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254 |
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255 TUint CeSCOLink::MinBandwidth() |
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256 { |
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257 TReal bandwidth = ((KMinESCOPacketSize * KMilliSecondsFactor) / iMaxLatency); |
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258 return static_cast<TUint>(bandwidth); |
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259 } |
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260 |
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261 |
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262 TUint CeSCOLink::MaxBandwidth() |
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263 { |
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264 TInt maxPacketSize = 0; |
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265 TInt interval = 1; |
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266 |
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267 if (iUserPacketTypes & TBTSyncPackets::ESyncPacketsEV5) |
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268 { |
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269 maxPacketSize = KMaxEV5Size; |
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270 interval = KEV5Slots + KEV3Slots; |
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271 } |
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272 else if (iUserPacketTypes & TBTSyncPackets::ESyncPacketsEV4) |
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273 { |
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274 maxPacketSize = KMaxEV4Size; |
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275 interval = KEV4Slots + KEV3Slots; |
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276 } |
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277 else if (iUserPacketTypes & TBTSyncPackets::ESyncPacketsEV3) |
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278 { |
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279 maxPacketSize = KMaxEV3Size; |
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280 interval = KEV3Slots + KEV3Slots; |
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281 } |
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282 |
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283 // Simple, easy to read version... |
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284 //TReal bandwidth = (maxPacketSize / (KBasebandSlotTime * tesco)); |
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285 |
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286 // Faster, still correct but harder to understand... Add 1 to force rounding up, just in case. |
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287 TUint bandwidth = ((KBasebandSlotsPerSecond * maxPacketSize) / interval) + 1; |
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288 return bandwidth; |
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289 } |
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290 |
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291 |
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292 TInt CeSCOLink::MakeConnection(CPhysicalLink* aPhysLink) |
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293 { |
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294 return aPhysLink->SynchronousConnect(iTransmitBandwidth, iReceiveBandwidth, |
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295 iMaxLatency, iVoiceSettings, |
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296 iRetransmissionEffort, iUserPacketTypes); |
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297 } |
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298 |
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299 |
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300 TDes8& CeSCOLink::InboundFrame() |
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301 { |
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302 return iInboundSCOFrame; |
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303 } |
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304 |
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305 void CeSCOLink::SetExtOptions(TBTSyncConnectOpts aSyncOpts) |
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306 { |
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307 iVoiceSettings = aSyncOpts.iAirMode & KAirCodingFormatBits; |
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308 |
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309 // Using nasty magic numbers as we have a naming clash... Responses to a command |
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310 // use a different numbering scheme to setup commands. |
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311 const TInt KCVSDResponse = 2; |
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312 if (iVoiceSettings <= KCVSDResponse) |
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313 { |
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314 if (iVoiceSettings == KCVSDResponse) |
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315 { |
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316 iVoiceSettings = ECVSD; |
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317 } |
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318 else |
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319 { |
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320 iVoiceSettings++; |
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321 } |
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322 } |
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323 |
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324 TInt interval = aSyncOpts.iTransmissionInterval; |
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325 |
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326 TReal latency = interval * KBasebandSlotTime * KMilliSecondsFactor; |
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327 iMaxLatency = static_cast<TInt16>(latency + 1); |
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328 |
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329 iTransmitBandwidth = static_cast<TUint>((KBasebandSlotsPerSecond * aSyncOpts.iTxPacketLength / interval) + 1); |
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330 iReceiveBandwidth = static_cast<TUint>((KBasebandSlotsPerSecond * aSyncOpts.iRxPacketLength / interval) + 1); |
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331 iRetransmissionEffort = aSyncOpts.iRetransmissionWindow; |
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332 } |
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333 |
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334 TUint16 CeSCOLink::GetPacketMask() const |
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335 { |
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336 return iUserPacketTypes; |
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337 } |
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338 |
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339 void CeSCOLink::GetExtOptions(TBTeSCOLinkParams& aOptions) const |
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340 { |
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341 aOptions.iBandwidth.iTransmit = iTransmitBandwidth; |
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342 aOptions.iBandwidth.iReceive = iReceiveBandwidth; |
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343 aOptions.iLatency = iMaxLatency; |
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344 aOptions.iRetransmissionEffort = iRetransmissionEffort; |
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345 aOptions.iCoding = iVoiceSettings; |
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346 } |