TB10.1 Example Applications: examples/Multimedia/ICL/ICLExample/iclspmoexample.cpp Source File

00001 // Copyright (c) 2008-2009 Nokia Corporation and/or its subsidiary(-ies).
-00002 // All rights reserved.
-00003 // This component and the accompanying materials are made available
-00004 // under the terms of "Eclipse Public License v1.0"
-00005 // which accompanies this distribution, and is available
-00006 // at the URL "http://www.eclipse.org/legal/epl-v10.html".
-00007 //
-00008 // Initial Contributors:
-00009 // Nokia Corporation - initial contribution.
-00010 //
-00011 // Contributors:
-00012 //
-00013 // Description:
-00014 // iclimageprocessorexample.cpp
-00015 // The code demonstrates Caps Spmo Utility functionality
-00016 //
-00017 
-00018 
-00019 
-00024 #include "iclexample.h"
-00025 #include <capsspmoutility/capsspmoutility.h>
-00026 
-00027 using namespace CapsSpmoUtility;
-00028 
-00029 void CIclExample::GeneratingSpmoL()
-00030         {
-00031         // Start new spmo optimized for QVGA screen size.
-00032         CCapsSpmo* spmo = CapsSpmoUtility::CCapsSpmoUtility::NewSpmoL(TSize(320, 240));
-00033         CleanupStack::PushL(spmo);
-00034 
-00035         // Generate spmo data from the input file
-00036         spmo->SetInputL(KInputFileName);
-00037         spmo->GenerateFromInputL();
-00038 
-00039         // Add the generated Spmo data to the output file.
-00040         spmo->AddToFileL(KInputWithSpmoFileName);
-00041         
-00042         CleanupStack::PopAndDestroy(spmo);
-00043         }
-00044 
-00045 #define CHUNK_SIZE 8192 
-00046 void CIclExample::GeneratingSpmoIterativelyL()
-00047         {
-00048         // Start new spmo optimized for QVGA screen size.
-00049         CCapsSpmo* spmo = CapsSpmoUtility::CCapsSpmoUtility::NewSpmoL(TSize(320, 240));
-00050         CleanupStack::PushL(spmo);
-00051 
-00052         RFile file;
-00053         TInt fileSize = 0;
-00054 
-00055         // Open the file for reading.
-00056         User::LeaveIfError(file.Open(iFs, KInputFileName, EFileRead));
-00057         CleanupClosePushL(file);
-00058 
-00059     User::LeaveIfError(file.Size(fileSize));
-00060 
-00061         // Prepare memory buffer for 8K chunk
-00062         HBufC8* chunk = HBufC8::NewMaxL(CHUNK_SIZE);
-00063         TPtr8 chunkPtr = chunk->Des();
-00064 
-00065         // We must reorder the cleanupstack.
-00066         CleanupStack::Pop(); // file
-00067     CleanupStack::PushL(chunk);
-00068     CleanupClosePushL(file);
-00069 
-00070     if (file.SubSessionHandle())
-00071                 {
-00072                 // Begin spmo streaming
-00073                 spmo->BeginInputStreamL();
-00074 
-00075                 TInt leftToRead = fileSize;
-00076                 while (leftToRead >= CHUNK_SIZE)
-00077                         {
-00078                         leftToRead -= CHUNK_SIZE;
-00079                         User::LeaveIfError(file.Read(chunkPtr, CHUNK_SIZE)); 
-00080                         spmo->ContinueInputStreamL(chunkPtr);                   
-00081                         }       
-00082 
-00083                 if (leftToRead != 0) 
-00084                         {
-00085                         User::LeaveIfError(file.Read(chunkPtr, leftToRead)); 
-00086                         spmo->ContinueInputStreamL(chunkPtr);
-00087                         }
-00088 
-00089                 spmo->EndInputStreamL();
-00090                 }
-00091 
-00092         // Generate spmo data from the processed input stream.
-00093         spmo->GenerateFromInputL();
-00094         
-00095         CleanupStack::PopAndDestroy(2); // file chunk
-00096 
-00097         // Get just generated spmo data and save it to a binary file.
-00098         TPtr8 spmoData = spmo->BufferL();
-00099 
-00100         // Open the file for writing.
-00101         User::LeaveIfError(file.Replace(iFs, KSpmoFileName, EFileWrite));
-00102         CleanupClosePushL(file);
-00103 
-00104         User::LeaveIfError(file.Write(spmoData)); 
-00105         
-00106         CleanupStack::PopAndDestroy(2,spmo); // file spmo
-00107         }
-