author | Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com> |
Tue, 27 Apr 2010 17:02:55 +0300 | |
branch | RCL_3 |
changeset 14 | 5bf83dc720b3 |
parent 0 | 1bce908db942 |
permissions | -rw-r--r-- |
0
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/* |
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* Copyright (c) 2006 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: |
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* |
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*/ |
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// INCLUDES |
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#include <e32math.h> |
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#include "mccfilesourcetypebase.h" |
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#include "mccfilesourcelogs.h" |
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#include "mccfilesourceimpl.h" |
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// CONSTANTS |
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const TInt KRandMax = 0x7fff; |
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const TUint32 KMccTimingCorrectionIntervalMicrosecs = 800000; |
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const TUint32 KMccTimingCorrectionToleranceMillisecs = 400; |
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// ----------------------------------------------------------------------------- |
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// CMccFileSourceTypeBase::~CMccFileSourceTypeBase |
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// ----------------------------------------------------------------------------- |
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// |
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CMccFileSourceTypeBase::~CMccFileSourceTypeBase() |
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{ |
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delete iPeriodicRunner; |
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iFrames.ResetAndDestroy(); |
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} |
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// ----------------------------------------------------------------------------- |
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// CMccFileSourceTypeBase::SetFileHandle |
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// ----------------------------------------------------------------------------- |
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// |
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void CMccFileSourceTypeBase::SetFileHandle( MP4Handle aMP4Handle ) |
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{ |
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iMP4Handle = aMP4Handle; |
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} |
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// ----------------------------------------------------------------------------- |
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// CMccFileSourceTypeBase::FillBufferL |
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// ----------------------------------------------------------------------------- |
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// |
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void CMccFileSourceTypeBase::FillBufferL( |
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CMMFBuffer* aBuffer, |
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MDataSink* aConsumer ) |
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{ |
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iConsumer = aConsumer; |
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iConsumerBuffer = aBuffer; |
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} |
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// ----------------------------------------------------------------------------- |
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// CMccFileSourceTypeBase::StopTimer |
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// ----------------------------------------------------------------------------- |
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// |
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void CMccFileSourceTypeBase::StopTimer() |
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{ |
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iPeriodicRunner->Stop(); |
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SetPaused( ETrue ); |
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} |
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// ----------------------------------------------------------------------------- |
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// CMccFileSourceTypeBase::Cleanup |
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// ----------------------------------------------------------------------------- |
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// |
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void CMccFileSourceTypeBase::Cleanup() |
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{ |
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iConsumer = NULL; |
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iConsumerBuffer = NULL; |
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} |
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// ----------------------------------------------------------------------------- |
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// CMccFileSourceTypeBase::SetPositionL |
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// ----------------------------------------------------------------------------- |
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// |
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void CMccFileSourceTypeBase::SetPositionL( TUint32 aPosition, TBool aResuming ) |
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{ |
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TUint32 oldPosition = iPosition; |
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__FILESOURCE_CONTROLL_INT2( "CMccFileSourceTypeBase::SetPositionL, old pos:", |
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oldPosition," proposed pos:", aPosition ) |
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// If position is tried to be set over the end, end position is used. |
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aPosition = Min( aPosition, Duration() ); |
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__FILESOURCE_CONTROLL_INT1( "CMccFileSourceTypeBase::SetPositionL, sanitized pos:", |
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aPosition ) |
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if ( iMP4Handle == NULL || IsPaused() ) |
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{ |
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iPosition = aPosition; |
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iPositionChangedWhilePaused = |
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iPositionChangedWhilePaused ? iPositionChangedWhilePaused : |
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( oldPosition != iPosition ); |
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} |
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else if ( !aResuming || ( aResuming && iPositionChangedWhilePaused ) ) |
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{ |
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DoSetPositionL( aPosition ); |
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iPositionChangedWhilePaused = EFalse; |
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} |
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else |
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114 |
{ |
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// NOP |
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} |
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117 |
|
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__FILESOURCE_CONTROLL_INT2( "CMccFileSourceTypeBase::SetPositionL, new pos:", |
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iPosition, " resuming:", aResuming ) |
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120 |
|
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// Read interval value is used for preventing two subsequent frames |
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// having the same timestamp. |
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if ( oldPosition > iPosition ) |
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{ |
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// If rewinded, have to add time to timestamps |
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iPositionModifier += ( oldPosition - iPosition + iReadInterval ); |
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} |
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else if ( oldPosition < iPosition ) |
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{ |
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// If forwarded, have to subtract time from timestamps |
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TInt64 difference = ( iPosition - oldPosition ); |
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TInt64 difference2 = ( difference - iReadInterval ); |
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iPositionModifier -= ( ( difference2 > 0 ) ? difference2 : difference ); |
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} |
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else |
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136 |
{ |
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// NOP |
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} |
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139 |
|
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__FILESOURCE_CONTROLL_INT1( "CMccFileSourceTypeBase::SetPositionL, pos modifier:", |
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iPositionModifier ) |
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} |
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143 |
|
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// ----------------------------------------------------------------------------- |
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// CMccFileSourceTypeBase::ResetTimeL |
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// ----------------------------------------------------------------------------- |
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// |
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void CMccFileSourceTypeBase::ResetTimeL() |
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{ |
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SetPositionL(0); |
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151 |
|
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iPositionModifier = 0; |
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} |
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154 |
|
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// ----------------------------------------------------------------------------- |
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// CMccFileSourceTypeBase::ParseUpdateStreamDescription |
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// ----------------------------------------------------------------------------- |
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// |
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void CMccFileSourceTypeBase::ParseUpdateStreamDescription( MP4Handle aMP4Handle ) |
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{ |
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MP4Err error; |
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error = MP4ParseRequestStreamDescription( aMP4Handle, |
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( mp4_u32* ) &iStreamSize, ( mp4_u32* ) &iStreamAverageBitRate ); |
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164 |
|
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if (error != MP4_OK) |
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{ |
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__FILESOURCE_CONTROLL_INT1("CMccFileSourceTypeBase, \ |
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MP4ParseRequestStreamDescription error=",error) |
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} |
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} |
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171 |
|
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// ----------------------------------------------------------------------------- |
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// CMccFileSourceTypeBase::StreamAverageBitRate |
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// ----------------------------------------------------------------------------- |
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// |
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TUint32 CMccFileSourceTypeBase::StreamAverageBitRate() |
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{ |
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return iStreamAverageBitRate; |
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} |
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180 |
|
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// ----------------------------------------------------------------------------- |
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// CMccFileSourceTypeBase::SetStartTime |
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// ----------------------------------------------------------------------------- |
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// |
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void CMccFileSourceTypeBase::SetStartTime( ) |
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{ |
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__FILESOURCE_CONTROLL( "CMccFileSourceTypeBase::SetStartTime" ) |
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188 |
|
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iStartTime.HomeTime(); // Set start time to current time |
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iPreviousCorrection = iStartTime; |
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} |
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192 |
|
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// --------------------------------------------------------------------------- |
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// CMccFileSourceTypeBase::IsPaused |
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// --------------------------------------------------------------------------- |
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// |
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TBool CMccFileSourceTypeBase::IsPaused() const |
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{ |
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return iIsPaused; |
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} |
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201 |
|
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// --------------------------------------------------------------------------- |
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// CMccFileSourceTypeBase::MediaType |
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// --------------------------------------------------------------------------- |
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// |
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TMediaId CMccFileSourceTypeBase::MediaType() const |
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{ |
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return iMediaType; |
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} |
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|
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// --------------------------------------------------------------------------- |
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// CMccFileSourceTypeBase::Random |
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// --------------------------------------------------------------------------- |
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// |
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TUint16 CMccFileSourceTypeBase::Random() const |
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{ |
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TTime tmp_time; |
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tmp_time.HomeTime(); |
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TInt64 seed = tmp_time.Int64(); |
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TInt32 rand = Math::Rand( seed ); |
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return static_cast<TUint16>( Abs( rand ) % KRandMax ); |
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} |
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|
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// --------------------------------------------------------------------------- |
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// CMccFileSourceTypeBase::SetPaused |
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// --------------------------------------------------------------------------- |
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// |
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void CMccFileSourceTypeBase::SetPaused( TBool aIsPaused ) |
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{ |
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__FILESOURCE_CONTROLL_INT2( |
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"CMccFileSourceTypeBase::SetPaused, iIsPaused:", |
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iIsPaused, " aIsPaused:", aIsPaused ) |
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|
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if ( aIsPaused && !iIsPaused ) |
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{ |
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iPauseStarted.HomeTime(); |
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} |
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else if ( iIsPaused && !aIsPaused ) |
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{ |
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iFrames.ResetAndDestroy(); |
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241 |
|
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iPreviousCorrection.HomeTime(); |
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|
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iPauseStopped.HomeTime(); |
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TTimeIntervalMicroSeconds differenceTemp = |
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iPauseStopped.MicroSecondsFrom( iPauseStarted ); |
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|
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iPositionModifier += ( differenceTemp.Int64() / KMccMicroToMilliConst ); |
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} |
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iIsPaused = aIsPaused; |
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} |
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252 |
|
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// --------------------------------------------------------------------------- |
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// CMccFileSourceTypeBase::CMccFileSourceTypeBase |
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// --------------------------------------------------------------------------- |
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// |
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CMccFileSourceTypeBase::CMccFileSourceTypeBase( |
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CMccFileSourceImpl& aSource, |
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TMediaId aMediaType ) : |
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iSource( aSource ), |
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iMediaType( aMediaType ) |
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{ |
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iSequenceNum = Random(); |
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} |
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|
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// --------------------------------------------------------------------------- |
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// CMccFileSourceTypeBase::ConstructL |
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// --------------------------------------------------------------------------- |
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// |
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void CMccFileSourceTypeBase::ConstructL() |
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{ |
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iPeriodicRunner = CMccPeriodicRunner::NewL(); |
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} |
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|
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// --------------------------------------------------------------------------- |
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// CMccFileSourceTypeBase::DoTimingCorrection |
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// --------------------------------------------------------------------------- |
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// |
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void CMccFileSourceTypeBase::DoTimingCorrection( TUint32 aCurrentPosition ) |
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{ |
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TTimeIntervalMicroSeconds elapsedTime; |
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TTime currentTime; |
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currentTime.HomeTime(); |
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|
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elapsedTime = currentTime.MicroSecondsFrom( iPreviousCorrection ); |
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if ( elapsedTime >= |
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TTimeIntervalMicroSeconds( KMccTimingCorrectionIntervalMicrosecs ) ) |
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{ |
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elapsedTime = currentTime.MicroSecondsFrom( iStartTime ); |
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|
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TUint32 elapsedTimeMs = elapsedTime.Int64() / KMccMicroToMilliConst; |
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|
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elapsedTimeMs -= iPositionModifier; |
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|
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__FILESOURCE_CONTROLL_INT2( |
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"CMccFileSourceTypeBase::DoTimingCorrection, position (msecs):", |
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aCurrentPosition, " played (msecs):", elapsedTimeMs ) |
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|
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if ( ( elapsedTimeMs + |
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KMccTimingCorrectionToleranceMillisecs ) < aCurrentPosition ) |
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{ |
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// Have read too fast, slow down if possible |
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// (only one notch slowing is allowed) |
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if ( iCorrectionInterval <= iTimerInterval ) |
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{ |
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__FILESOURCE_CONTROLL( |
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"CMccFileSourceTypeBase::DoTimingCorrection, slow down" ) |
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|
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const TReal KMccCorrectionModifier = 1.3; |
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iCorrectionInterval = (TUint32) (iTimerInterval * KMccCorrectionModifier); |
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} |
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} |
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else if ( ( elapsedTimeMs - |
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KMccTimingCorrectionToleranceMillisecs ) > aCurrentPosition ) |
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{ |
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// Have read too slow, speed up if possible |
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// (only one notch speeding is allowed) |
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if ( iCorrectionInterval >= iTimerInterval ) |
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319 |
{ |
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__FILESOURCE_CONTROLL( |
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"CMccFileSourceTypeBase::DoTimingCorrection, speed up" ) |
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const TReal KMccCorrectionModifier = 0.7; |
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iCorrectionInterval = (TUint32) (iTimerInterval * KMccCorrectionModifier); |
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} |
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} |
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else |
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{ |
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// No changes needed / normalized due interval changing |
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iCorrectionInterval = iTimerInterval; |
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} |
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|
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if ( iPeriodicRunner->Interval() != iCorrectionInterval ) |
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{ |
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__FILESOURCE_CONTROLL_INT1( |
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"CMccFileSourceTypeBase::DoTimingCorrection, start timer:", |
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iCorrectionInterval ) |
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|
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iPeriodicRunner->Start( iCorrectionInterval, TickCallBack() ); |
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} |
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|
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iPreviousCorrection = currentTime; |
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} |
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} |
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|
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// End of file |
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