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         }
+