core/AVSOfficePDFReader/JPXStream.cpp

#include "stdafx.h"

#include "MemoryUtils.h"
#include "Error.h"
#include "JPXStream.h"
#include "File.h"


//-------------------------------------------------------------------------------------------------------------------------------

JPXStream::JPXStream(Stream *pStream):
FilterStream(pStream)
{
	m_lCurPos       = 0;
	m_lBufferSize   = 0;
	m_pSourceBuffer = NULL;
}

JPXStream::~JPXStream() 
{
	Close();
	delete m_pStream;
}

void JPXStream::Reset() 
{
	m_pStream->Reset();

	// Èíèöèàëèçàöèÿ
	m_lCurPos       = 0;
	m_lBufferSize   = 0;
	m_pSourceBuffer = NULL;

	// Ñîçäàåì òåìïîâûé ôàéë, â êîòîðûé ñáðàñûâàåì êàðòèíêó
	FILE *pTempFile = NULL;

	CStringW wsTempFile = _T("");
	if ( !OpenTempFile( &wsTempFile, &pTempFile, _T("wb"), NULL, NULL ) )
	{
		_wunlink( wsTempFile.GetBuffer() );
		return;
	}

	int nChar = 0;
	BYTE *pBuffer = (BYTE*)MemUtilsMalloc( 32 );
	if ( pBuffer )
	{
		int nSize = 32, nLen = 0;
		while ( EOF != ( nChar = m_pStream->GetChar() ) )
		{
			if ( nLen >= nSize )
			{
				nSize *= 2;
				pBuffer = (BYTE*)MemUtilsRealloc( pBuffer, nSize );
			}

			pBuffer[nLen] = nChar;
			nLen++;
		}
		fwrite( pBuffer, 1, nLen, pTempFile );
		fclose( pTempFile );
		MemUtilsFree( pBuffer );
	}
	else
	{
		while ( EOF != ( nChar = m_pStream->GetChar() ) )
		{
			fputc( nChar, pTempFile );
		}
		fclose( pTempFile );
	}

	// Ñîçäàåì èíòåðôåéñ äëÿ ñîõðàíåíèÿ êàðòèíêè
	MediaCore::IAVSUncompressedVideoFrame *pImageMediaData = NULL;
	CoCreateInstance( MediaCore::CLSID_CAVSMediaData, NULL, CLSCTX_ALL, MediaCore::IID_IAVSMediaData, (void**)(&pImageMediaData) );
	if ( !pImageMediaData )
	{
		_wunlink( wsTempFile.GetBuffer() );
		return;
	}

	// Êîíâåðòèðóåì êàðòèíêó â èíòåðôåéñ
	AVSImageJpeg2000::IJ2kFile *pJpeg = NULL;
	CoCreateInstance( __uuidof( AVSImageJpeg2000::CJ2kFile ),      NULL, CLSCTX_INPROC_SERVER, __uuidof( AVSImageJpeg2000::IJ2kFile ),       (void **)(&pJpeg) );
	if ( !pJpeg )
	{
		_wunlink( wsTempFile.GetBuffer() );
		RELEASEINTERFACE( pImageMediaData );
		return;
	}

	IUnknown **ppImage = (IUnknown**)&pImageMediaData;
	pJpeg->J2kToInterface( wsTempFile.GetBuffer(), ppImage, L"<Jpeg2000-Options><OpenOptions><ConvertToRGBA value=\"0\"/></OpenOptions></Jpeg2000-Options>" );
	// Óäàëÿåì âðåìåííûé ôàéë
	_wunlink( wsTempFile.GetBuffer() );

	if ( NULL == ppImage || NULL == (*ppImage ) )
	{
		RELEASEINTERFACE( pImageMediaData );
		RELEASEINTERFACE( pJpeg );
		return;
	}

	MediaCore::IAVSUncompressedVideoFrame* pMediaDataIn = NULL;
	(*ppImage)->QueryInterface( MediaCore::IID_IAVSUncompressedVideoFrame, (void**)(&pMediaDataIn) );
	if ( NULL == pMediaDataIn )
	{
		RELEASEINTERFACE( pImageMediaData );
		RELEASEINTERFACE( pJpeg );
		return;
	}

	LONG lWidth          =    0; pMediaDataIn->get_Width(&lWidth);
	LONG lHeight         =    0; pMediaDataIn->get_Height(&lHeight);
	LONG lAspectX        =    0; pMediaDataIn->get_AspectRatioX(&lAspectX);
	LONG lAspectY        =    0; pMediaDataIn->get_AspectRatioY(&lAspectY);
	LONG lStride         =    0; pMediaDataIn->get_Stride( 0, &lStride );
	BYTE *pBufferPointer = NULL; pMediaDataIn->get_BufferSize( &m_lBufferSize );

	pMediaDataIn->get_Buffer( &pBufferPointer );

	// Êîïèðóåì äàííûå â áóôåð
	m_pSourceBuffer = (BYTE*)MemUtilsMalloc( m_lBufferSize );
	if ( !m_pSourceBuffer )
	{
		m_lBufferSize = 0;
		RELEASEINTERFACE( pMediaDataIn );
		RELEASEINTERFACE( pImageMediaData );
		RELEASEINTERFACE( pJpeg );
		return;
	}

	// Ïåðåâîðà÷èâàåì êàðòèíêó
	for ( int nY = 0; nY < lHeight; nY++ )
	{
		::memcpy( m_pSourceBuffer + lStride * nY, pBufferPointer + lStride * ( lHeight - nY - 1 ), lStride );
	}

	// Îñâîáîæäàåì âñå èíòåðôåéñû
	RELEASEINTERFACE( pMediaDataIn );
	RELEASEINTERFACE( pJpeg );
	RELEASEINTERFACE( pImageMediaData );
}

void JPXStream::Close() 
{
	MemUtilsFree( m_pSourceBuffer );
	m_pSourceBuffer = NULL;

	FilterStream::Close();
}

int JPXStream::GetChar() 
{
	int nChar = 0;

	if ( m_lCurPos < m_lBufferSize )
	{
		nChar = m_pSourceBuffer[m_lCurPos];
		m_lCurPos++;
	}
	else
		return EOF;

	return nChar;
}

int JPXStream::LookChar() 
{
	if ( m_lBufferSize > 0 && m_lCurPos < m_lBufferSize )
		return m_pSourceBuffer[m_lCurPos];

	return EOF;
}
StringExt *JPXStream::GetPSFilter(int nPSLevel, char *sIndent)
{
	return NULL;
}

BOOL JPXStream::IsBinary(BOOL bLast) 
{
	return m_pStream->IsBinary(TRUE);
}

void JPXStream::GetImageParams(int *pBitsPerComponent, StreamColorSpaceMode *peModeCS) 
{
	*pBitsPerComponent = 8;
	*peModeCS = streamCSDeviceRGB;
}