author | Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com> |
Tue, 02 Feb 2010 01:04:58 +0200 | |
changeset 0 | 1bce908db942 |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 2002-2005 Nokia Corporation and/or its subsidiary(-ies). |
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* All rights reserved. |
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* This component and the accompanying materials are made available |
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* under the terms of "Eclipse Public License v1.0" |
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* which accompanies this distribution, and is available |
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* at the URL "http://www.eclipse.org/legal/epl-v10.html". |
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* |
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* Initial Contributors: |
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* Nokia Corporation - initial contribution. |
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* |
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* Contributors: |
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* |
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* Description: StateMachine for payloadformat plugins. |
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* |
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*/ |
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// INCLUDE FILES |
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#include "formatstatemachine.h" |
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// ============================= LOCAL FUNCTIONS =============================== |
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// ============================ MEMBER FUNCTIONS =============================== |
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// ----------------------------------------------------------------------------- |
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// CFormatEncodeStateMachine::CFormatEncodeStateMachine |
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// C++ default constructor can NOT contain any code, that |
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// might leave |
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// ----------------------------------------------------------------------------- |
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// |
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CFormatEncodeStateMachine::CFormatEncodeStateMachine( |
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MPayloadFormatWrite* aClient ) : CActive( EPriorityStandard ), |
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iClient( aClient ), iState( EEncodeIdle ) |
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{ |
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CActiveScheduler::Add( this ); |
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} |
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// ----------------------------------------------------------------------------- |
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// CFormatEncodeStateMachine::ConstructL() |
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// Symbian 2nd phase constructor can leave. |
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// ----------------------------------------------------------------------------- |
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// |
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void CFormatEncodeStateMachine::ConstructL() |
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{ |
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User::LeaveIfNull( iClient ); |
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} |
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// ----------------------------------------------------------------------------- |
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// CFormatEncodeStateMachine::NewL |
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// Static constructor. |
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// ----------------------------------------------------------------------------- |
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// |
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CFormatEncodeStateMachine* CFormatEncodeStateMachine::NewL( |
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MPayloadFormatWrite* aClient ) |
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{ |
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CFormatEncodeStateMachine* self = |
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new ( ELeave ) CFormatEncodeStateMachine( aClient ); |
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CleanupStack::PushL( self ); |
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self->ConstructL(); |
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CleanupStack::Pop( self ); |
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return self; |
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} |
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// ------------------------------------------------------------------------------ |
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// CFormatEncodeStateMachine::~CFormatEncodeStateMachine |
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// Destructor |
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// ----------------------------------------------------------------------------- |
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// |
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CFormatEncodeStateMachine::~CFormatEncodeStateMachine() |
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{ |
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Cancel(); |
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} |
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// ----------------------------------------------------------------------------- |
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// CFormatEncodeStateMachine::ChangeState |
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// Changes state |
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// ----------------------------------------------------------------------------- |
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// |
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void CFormatEncodeStateMachine::ChangeState( TFormatEncodeState aNewState ) |
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{ |
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// Observe the transition rules |
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TBool changeState = EFalse; |
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switch ( aNewState ) |
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{ |
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case EEncodeIdle: |
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// Can change to EEncodeIdle state from any other state. |
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changeState = ETrue; |
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break; |
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case EEmptySourceBuffer: |
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if ( ESourceBufferEmptied == iState || EEncodeIdle == iState ) |
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{ |
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changeState = ETrue; |
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} |
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break; |
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case ESourceBufferEmptied: |
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if ( EEmptySourceBuffer == iState ) |
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{ |
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changeState = ETrue; |
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108 |
} |
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109 |
break; |
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|
110 |
|
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111 |
default: |
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112 |
break; |
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113 |
} |
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114 |
|
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115 |
// Change the state if everything is OK. |
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if ( changeState ) |
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{ |
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118 |
iState = aNewState; |
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119 |
|
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// Idle states, no callbacks to client, thus no need for activation. |
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if ( EEncodeIdle != iState ) |
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122 |
{ |
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TRequestStatus* stat = &iStatus; |
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Cancel(); |
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User::RequestComplete( stat, KErrNone ); |
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SetActive(); |
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} |
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} |
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} |
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130 |
|
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// ----------------------------------------------------------------------------- |
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// CFormatEncodeStateMachine::CurrentState |
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// Returns the current state |
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// ----------------------------------------------------------------------------- |
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135 |
// |
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TFormatEncodeState CFormatEncodeStateMachine::CurrentState() const |
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{ |
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return iState; |
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} |
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140 |
|
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// ----------------------------------------------------------------------------- |
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// CFormatEncodeStateMachine::RunL |
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// From CActive Handles an active object’s request completion event. |
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// ----------------------------------------------------------------------------- |
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145 |
// |
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void CFormatEncodeStateMachine::RunL() |
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147 |
{ |
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if ( KErrNone == iStatus.Int() ) |
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149 |
{ |
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switch ( iState ) |
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151 |
{ |
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case EEncodeIdle: |
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// Do nothing but wait. |
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154 |
break; |
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155 |
|
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156 |
case EEmptySourceBuffer: |
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iClient->EmptySourceBufferL(); |
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158 |
break; |
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159 |
|
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160 |
case ESourceBufferEmptied: |
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iClient->SourceBufferEmptiedL(); |
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162 |
break; |
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163 |
|
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164 |
default: |
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User::Leave( KErrArgument ); |
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166 |
break; |
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167 |
} |
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168 |
} |
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169 |
else |
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170 |
{ |
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171 |
User::Leave( iStatus.Int() ); |
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172 |
} |
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173 |
} |
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174 |
|
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175 |
// ----------------------------------------------------------------------------- |
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176 |
// CFormatEncodeStateMachine::DoCancel |
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177 |
// From CActive Implements cancellation of an outstanding request. |
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178 |
// ----------------------------------------------------------------------------- |
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179 |
// |
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180 |
void CFormatEncodeStateMachine::DoCancel() |
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181 |
{ |
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182 |
|
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183 |
} |
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184 |
|
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185 |
// ----------------------------------------------------------------------------- |
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186 |
// CFormatEncodeStateMachine::RunError |
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187 |
// Handle the leave occured in RunL() function |
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188 |
// ----------------------------------------------------------------------------- |
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189 |
// |
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190 |
TInt CFormatEncodeStateMachine::RunError( TInt /*aError*/ ) |
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191 |
{ |
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192 |
return KErrNone; |
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193 |
}; |
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194 |
|
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195 |
// ----------------------------------------------------------------------------- |
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196 |
// CFormatDecodeStateMachine::CFormatDecodeStateMachine |
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197 |
// C++ default constructor can NOT contain any code, that |
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198 |
// might leave |
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199 |
// ----------------------------------------------------------------------------- |
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200 |
// |
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201 |
CFormatDecodeStateMachine::CFormatDecodeStateMachine( |
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202 |
MPayloadFormatRead* aClient ) : CActive( EPriorityStandard ), |
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203 |
iClient( aClient ), iState( EDecodeIdle ) |
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204 |
{ |
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205 |
CActiveScheduler::Add( this ); |
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206 |
} |
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207 |
|
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208 |
// ----------------------------------------------------------------------------- |
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209 |
// CFormatDecodeStateMachine::ConstructL |
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210 |
// Symbian 2nd phase constructor can leave. |
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211 |
// ----------------------------------------------------------------------------- |
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212 |
// |
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213 |
void CFormatDecodeStateMachine::ConstructL() |
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214 |
{ |
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215 |
User::LeaveIfNull( iClient ); |
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216 |
} |
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|
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// ----------------------------------------------------------------------------- |
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// CFormatDecodeStateMachine::NewL |
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// Static constructor. |
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// ----------------------------------------------------------------------------- |
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// |
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CFormatDecodeStateMachine* CFormatDecodeStateMachine::NewL( |
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MPayloadFormatRead* aClient ) |
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{ |
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CFormatDecodeStateMachine* self = |
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new ( ELeave ) CFormatDecodeStateMachine( aClient ); |
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|
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CleanupStack::PushL( self ); |
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self->ConstructL(); |
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CleanupStack::Pop( self ); |
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232 |
|
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return self; |
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} |
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235 |
|
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// ----------------------------------------------------------------------------- |
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// CFormatDecodeStateMachine::~CFormatDecodeStateMachine |
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// Destructor |
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// ----------------------------------------------------------------------------- |
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// |
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CFormatDecodeStateMachine::~CFormatDecodeStateMachine() |
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{ |
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Cancel(); |
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} |
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245 |
|
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// ----------------------------------------------------------------------------- |
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// CFormatDecodeStateMachine::ChangeState |
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// Change State |
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// ----------------------------------------------------------------------------- |
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// |
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void CFormatDecodeStateMachine::ChangeState( TFormatDecodeState aNewState ) |
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{ |
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// Observe the state transition rules. |
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TBool changeState = EFalse; |
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switch ( aNewState ) |
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{ |
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// These state transitions allowed from all states. |
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case EDecodeIdle: |
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case ESourceDataReady: |
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changeState = ETrue; |
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break; |
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|
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case EEmptyDataToSink: |
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if ( ESourceDataReady == iState || EEmptyDataToSink == iState ) |
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{ |
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changeState = ETrue; |
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} |
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break; |
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|
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default: |
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break; |
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} |
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|
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if ( changeState ) |
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{ |
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iState = aNewState; |
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|
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// Idle state, no callbacks to client, thus no need for activation. |
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if ( EDecodeIdle != iState ) |
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{ |
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TRequestStatus* stat = &iStatus; |
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Cancel(); |
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User::RequestComplete( stat, KErrNone ); |
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SetActive(); |
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} |
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} |
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} |
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288 |
|
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// ----------------------------------------------------------------------------- |
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// CFormatDecodeStateMachine::CurrentState |
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// Get current state |
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// ----------------------------------------------------------------------------- |
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// |
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TFormatDecodeState CFormatDecodeStateMachine::CurrentState() const |
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{ |
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return iState; |
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} |
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298 |
|
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// ----------------------------------------------------------------------------- |
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// CFormatDecodeStateMachine::RunL |
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// From CActive Handles an active object’s request completion event. |
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// ----------------------------------------------------------------------------- |
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303 |
// |
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void CFormatDecodeStateMachine::RunL() |
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305 |
{ |
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if ( KErrNone == iStatus.Int() ) |
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307 |
{ |
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switch ( iState ) |
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309 |
{ |
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case EDecodeIdle: |
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// TBD: Do idle processing. |
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312 |
break; |
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313 |
|
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314 |
case ESourceDataReady: |
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iClient->FillSinkBufferL(); |
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316 |
break; |
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317 |
|
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case EEmptyDataToSink: |
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iClient->SendDataToSinkL(); |
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320 |
break; |
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321 |
|
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322 |
default: |
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323 |
User::Leave( KErrArgument ); |
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324 |
break; |
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325 |
} |
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326 |
} |
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else |
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{ |
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User::Leave( iStatus.Int() ); |
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} |
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}; |
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// ----------------------------------------------------------------------------- |
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// CFormatDecodeStateMachine::DoCancel |
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// From CActive Implements cancellation of an outstanding request. |
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// ----------------------------------------------------------------------------- |
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// |
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void CFormatDecodeStateMachine::DoCancel() |
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{ |
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}; |
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|
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// ----------------------------------------------------------------------------- |
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// CFormatDecodeStateMachine::RunError |
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// Handle the leave occured in RunL() function |
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// ----------------------------------------------------------------------------- |
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// |
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TInt CFormatDecodeStateMachine::RunError( TInt /*aError*/ ) |
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{ |
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return KErrNone; |
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}; |
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// End of File |