hvviddec.cpp
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上传日期:2007-06-06
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- /* ***** BEGIN LICENSE BLOCK *****
- * Version: RCSL 1.0/RPSL 1.0
- *
- * Portions Copyright (c) 1995-2002 RealNetworks, Inc. All Rights Reserved.
- *
- * The contents of this file, and the files included with this file, are
- * subject to the current version of the RealNetworks Public Source License
- * Version 1.0 (the "RPSL") available at
- * http://www.helixcommunity.org/content/rpsl unless you have licensed
- * the file under the RealNetworks Community Source License Version 1.0
- * (the "RCSL") available at http://www.helixcommunity.org/content/rcsl,
- * in which case the RCSL will apply. You may also obtain the license terms
- * directly from RealNetworks. You may not use this file except in
- * compliance with the RPSL or, if you have a valid RCSL with RealNetworks
- * applicable to this file, the RCSL. Please see the applicable RPSL or
- * RCSL for the rights, obligations and limitations governing use of the
- * contents of the file.
- *
- * This file is part of the Helix DNA Technology. RealNetworks is the
- * developer of the Original Code and owns the copyrights in the portions
- * it created.
- *
- * This file, and the files included with this file, is distributed and made
- * available on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
- * EXPRESS OR IMPLIED, AND REALNETWORKS HEREBY DISCLAIMS ALL SUCH WARRANTIES,
- * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, FITNESS
- * FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
- *
- * Technology Compatibility Kit Test Suite(s) Location:
- * http://www.helixcommunity.org/content/tck
- *
- * Contributor(s):
- *
- * ***** END LICENSE BLOCK ***** */
- /**********************************************************************
- * VvVidDec.CPP
- *
- *
- * PUBLIC:
- *
- * CreateInstance - creates an object instance of this class
- * Receive - receives input from the input pin,
- * sends decompressed output to output pin
- * CheckInputType - called to verify media type supported by input pin
- * CheckTransform - called to verify media type supported by output pin
- * DecideBufferSize - called by output pin to set output sample buffer size
- * StartStreaming - called by input pin when video streaming starts
- * StopStreaming - called by input pin when video streaming ends
- * GetMediaType - returns media types supported by output pin
- * EndOfStream - called by output pin when end-of-stream is reached
- * EndFlush - called by input pin when flushing stream
- *
- * VvVideoDecoderFilter - constructor function
- * ~VvVideoDecoderFilter - destructor function
- *
- * PROTECTED:
- *
- * PRIVATE:
- *
- * Init - initializes all member variables of this class
- *
- * FILE DESCRIPTION:
- *
- * This file contains the source code for the Vivo Video
- * Decompression filter class, VvVideoDecoderFilter. This filter
- * is a Helix decoder that is used to decompress
- * H.263 video format data.. THIS Abstraction of the LAYER does not make any sense??
- **********************************************************************/
- #include "hvviddec.h"
- #include "hxcinst.h"
- #include "h263codecf.h"
- //*** begin VvVideoDecoderFilter class ***
- /**********************************************************************
- *
- * VvVideoDecoderFilter
- *
- * PARAMETERS:
- *
- * pFilterName: the string name for this transform filter
- * lpUnknown:
- * pHResult:
- *
- * RETURNS: None
- *
- * DESCRIPTION: Constructor function
- *
- *********************************************************************/
- VvVideoDecoderFilter::VvVideoDecoderFilter( HX_RESULT& ps )
- {
- Init(); // initialize the member variables of this class
- ps=HXR_OK;
- }
- /**********************************************************************
- *
- * CreateInstance
- *
- * PARAMETERS:
- *
- * lpUnknown:
- * pHResult:
- *
- * RETURNS:
- *
- * CUnknown*:
- *
- * DESCRIPTION:
- *
- * This function is used to create an object instance of this
- * class that will be registered in the system registry.
- *
- *********************************************************************/
- VvVideoDecoderFilter*
- VvVideoDecoderFilter::CreateInstance(HX_RESULT& ps)
- {
- VvVideoDecoderFilter *pcVideoFilter = NULL; // an instance of this transform filter
- // try to create an instance of this transform filter class
- pcVideoFilter = new VvVideoDecoderFilter(ps);
- return( pcVideoFilter );
- }
- /**********************************************************************
- *
- * ~VvVideoDecoderFilter
- *
- * PARAMETERS: None
- *
- * RETURNS: None
- *
- * DESCRIPTION: Destructor function
- *
- *********************************************************************/
- VvVideoDecoderFilter::~VvVideoDecoderFilter( void )
- {
- if ( NULL != m_pcVideoCodec ) // if the video data stream was created
- {
- delete m_pcVideoCodec; // delete the audio data stream
- m_pcVideoCodec = NULL; // clear its pointer
- }
- }
- /**********************************************************************
- *
- * Init
- *
- * PARAMETERS: None
- *
- * RETURNS: None
- *
- * DESCRIPTION:
- *
- * This function is used to initialize all the member variables
- * of this class.
- *
- *********************************************************************/
- void
- VvVideoDecoderFilter::Init( void )
- {
- m_pcVideoCodec = NULL;
- m_bStartDecompress = FALSE;
- }
- /**********************************************************************
- *
- * Receive
- *
- * PARAMETERS:
- *
- * piInSample: the input sample that is passed into the input pin
- *
- * RETURNS:
- *
- * HRESULT: Returns NOERROR if this function is successful,
- * otherwise returns the error that occurred.
- *
- * DESCRIPTION:
- *
- * This function gets called from the input pin whenever any
- * sample data gets sent to the pin. The sample data is then
- * processed and delivered to the output pin.
- *
- *********************************************************************/
- HX_RESULT
- VvVideoDecoderFilter::Receive(
- const HXVA_Image &src,
- HXVA_Image &dst
- )
- {
- // this call is made to lock the critical section guarding the receiving
- // thread; critical sections need to be locked in order to protect data
- // during multithreading operations
- //CAutoLock cReceiveLock( &m_csReceive );
- HX_RESULT lResult = HXR_OK; // checks the return value of called functions
- if ( NULL == m_pcVideoCodec ) // if the video codec instance is invalid
- return( HXR_FAIL ); // exit this function
- // if the video decompression process has not been started yet
- if ( m_bStartDecompress == FALSE )
- {
- // try to start the video decompression process
- lResult = m_pcVideoCodec->DecompressStart( src.format, dst.format );
- if ( lResult != HXR_OK ) // if the decompression process could not be started
- return( HXR_FAIL ); // return an error
- m_bStartDecompress = TRUE; // indicate that the video decompression has been started
- }
- // try to decompress the current video frame
- lResult = m_pcVideoCodec->DecompressConvert( src, dst );
- if ( lResult != HXR_OK ) // if the video frame could not be decompressed
- return( HXR_FAIL ); // return an error
- //piOutSample->SetTime( (REFERENCE_TIME*)&tStart,
- // (REFERENCE_TIME*)&tStop );
- return( HXR_OK );
- }
- /**********************************************************************
- *
- * DecideBufferSize
- *
- * PARAMETERS:
- *
- * piAllocator: the allocater used to allocate the required
- * output sample buffer memory
- * psProperties: contains the actual buffer sizes required by
- * the output sample
- *
- * RETURNS:
- *
- * HRESULT: Returns NOERROR if this function is successful,
- * otherwise returns the error that occurred.
- *
- * DESCRIPTION:
- *
- * This function is called from the output pin to allocate the
- * memory required to hold the output pin data stream.
- *
- *********************************************************************/
- HX_RESULT
- VvVideoDecoderFilter::DecideBufferSize(void)
- {
- return( HXR_OK );
- }
- /**********************************************************************
- *
- * StartStreaming
- *
- * PARAMETERS: None
- *
- * RETURNS:
- *
- * HRESULT: Returns NOERROR if this function is successful,
- * otherwise returns the error that occurred.
- *
- * DESCRIPTION:
- *
- * This function gets called by the base filter classes whenever
- * this filter is in the process of switching to active mode,
- * paused or running.
- *
- *********************************************************************/
- HX_RESULT
- VvVideoDecoderFilter::StartStreaming(
- const HXVA_Image_Format &src_fmt,
- const HXVA_Image_Format &dst_fmt
- )
- {
- // this call is made to lock the critical section guarding this filter
- // critical sections need to be locked in order to protect data during
- // multithreading operations
- //CAutoLock cFilterLock( &m_csFilter );
- HX_RESULT lResult = HXR_OK; // checks the return of called functions
- // try to load the video codec into global memory
- lResult = TheCodec().Load();
- if ( lResult != HXR_OK ) // if it could not be loaded
- return( HXR_FAIL ); // return an error
- TheCodec().Enable(); // enable the video codec for use
- // GNEEL: SEND DOWN FID
- m_pcVideoCodec = TheCodec().OpenInstance( );
- if ( NULL == m_pcVideoCodec ) // if the video codec instance could not be created
- return( HXR_OUTOFMEMORY ); // return an out of memory error
- m_input_format = src_fmt;
- m_output_format = dst_fmt;
- return( HXR_OK );
- }
- /**********************************************************************
- *
- * StopStreaming
- *
- * PARAMETERS: None
- *
- * RETURNS:
- *
- * HRESULT: Returns NOERROR if this function is successful,
- * otherwise returns the error that occurred.
- *
- * DESCRIPTION:
- *
- * This function gets called by the base filter classes whenever
- * this transform filter is in the process of leaving active mode
- * and entering stopped mode.
- *
- *********************************************************************/
- HX_RESULT
- VvVideoDecoderFilter::StopStreaming( void )
- {
- // this call is made to lock the critical sections guarding this filter
- // and receiving thread; critical sections need to be locked in order to
- // protect data during multithreading operations
- //CAutoLock cFilterLock( &m_csFilter ),
- // cReceiveLock( &m_csReceive );
- if ( NULL == m_pcVideoCodec )
- return( HXR_FAIL );
- //end compression before deleting the pointer, otherwise codec stays open
- HX_RESULT lResult = HXR_OK; // checks the return of called functions
- if ( m_bStartDecompress == TRUE ) {
- lResult = m_pcVideoCodec->DecompressEnd();
- if ( lResult == HXR_OK ) {
- m_bStartDecompress = FALSE;
- }
- }
- // terminate the video codec instance to remove it from memory
- TheCodec().CloseInstance( (HXH263CodecInstance*) m_pcVideoCodec );
- m_pcVideoCodec = NULL;
- TheCodec().Disable();
- TheCodec().Free();
- return( HXR_OK );
- }
- /**********************************************************************
- *
- * EndOfStream
- *
- * PARAMETERS: None
- *
- * RETURNS:
- *
- * HRESULT: Returns NOERROR if this function is successful,
- * otherwise returns the error that occurred.
- *
- * DESCRIPTION:
- *
- * This function gets called from the output pin whenever
- * the output data has reached the end of the stream. If this
- * function is overridden, the end-of-stream notification must
- * be passed to the next filter.
- *
- *********************************************************************/
- HX_RESULT
- VvVideoDecoderFilter::EndOfStream( void )
- {
- // this call is made to lock the critical section guarding the receiving
- // thread; critical sections need to be locked in order to protect data
- // during multithreading operations
- //CAutoLock cReceiveLock(&m_csReceive);
- if ( NULL == m_pcVideoCodec )
- {
- return HXR_FAIL;
- }
- // return the end-of-stream notification to the next filter that
- // is connected to this filter
- return HXR_OK;
- }
- /**********************************************************************
- *
- * EndFlush
- *
- * PARAMETERS: None
- *
- * RETURNS:
- *
- * HRESULT: Returns NOERROR if this function is successful,
- * otherwise returns the error that occurred.
- *
- * DESCRIPTION:
- *
- * This function gets called from the input pin whenever the
- * pin is leaving the flushing state. If this function is
- * overridden, the notification must be passed to the next filter.
- *
- *********************************************************************/
- HX_RESULT
- VvVideoDecoderFilter::EndFlush( void )
- {
- // this call is made to lock the critical section guarding the receiving
- // thread; critical sections need to be locked in order to protect data
- // during multithreading operations
- //CAutoLock cReceiveLock(&m_csReceive);
- // return the flushing notification to the next filter that is
- // connected to this filter
- return HXR_OK;
- }
- /**********************************************************************
- *
- * GetMediaType
- *
- * PARAMETERS:
- *
- * nPosition: the position of the media type in the media type list
- * pcMediaType:the returned output pin media type
- *
- * RETURNS:
- *
- * HRESULT: Returns NOERROR if this function is successful,
- * otherwise returns the error that occurred.
- *
- * DESCRIPTION:
- *
- * This function is called by the base filter classes to supply
- * one of the media types that the output pin supports based on
- * the position of the media type, nPosition, in the media type list.
- *
- *********************************************************************/
- HX_RESULT
- VvVideoDecoderFilter::GetMediaType( void )
- {
- return( HXR_OK );
- }
- /**********************************************************************
- *
- * CheckInputType
- *
- * PARAMETERS:
- *
- * pcInMediaType: the media type associated with the input pin
- *
- * RETURNS:
- *
- * HRESULT: Returns NOERROR if this function is successful,
- * otherwise returns the error that occurred.
- *
- * DESCRIPTION:
- *
- * This function gets called by the base filter classes to
- * verify that the input pin supports the input media type
- * and to propose an output pin media type based on the
- * input pin media type.
- *
- *********************************************************************/
- HX_RESULT
- VvVideoDecoderFilter::CheckInputType( void )
- {
- return HXR_OK;
- }
- /**********************************************************************
- *
- * CheckTransform
- *
- * PARAMETERS:
- *
- * pcInMediaType: the media type associated with the input pin
- * pcOutMediaType: the media type associated with the output pin
- *
- * RETURNS:
- *
- * HRESULT: Returns NOERROR if this function is successful,
- * otherwise returns the error that occurred.
- *
- * DESCRIPTION:
- *
- * This function gets called by the base filter classes to verify
- * that th input and output pins support their media types
- *
- *********************************************************************/
- HX_RESULT
- VvVideoDecoderFilter::CheckTransform( void )
- {
- return HXR_OK;
- }
- //*** end VvVideoDecoderFilter class ***