riff.cpp

linux下的一款播放器

/* ***** BEGIN LICENSE BLOCK *****
 * Source last modified: $Id: riff.cpp,v 1.5.8.2 2004/07/09 01:55:14 hubbe Exp $
 * 
 * Portions Copyright (c) 1995-2004 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 (the "RPSL") available at
 * http://www.helixcommunity.org/content/rpsl unless you have licensed
 * the file under the current version of the RealNetworks Community
 * Source License (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.
 * 
 * Alternatively, the contents of this file may be used under the
 * terms of the GNU General Public License Version 2 or later (the
 * "GPL") in which case the provisions of the GPL are applicable
 * instead of those above. If you wish to allow use of your version of
 * this file only under the terms of the GPL, and not to allow others
 * to use your version of this file under the terms of either the RPSL
 * or RCSL, indicate your decision by deleting the provisions above
 * and replace them with the notice and other provisions required by
 * the GPL. If you do not delete the provisions above, a recipient may
 * use your version of this file under the terms of any one of the
 * RPSL, the RCSL or the GPL.
 * 
 * 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 ***** */

#include "hlxclib/string.h"
#include "hxtypes.h"
#include "hxcom.h"
#include "hxmarsh.h"
#include "ihxpckts.h"
#include "hxfiles.h"
#include "riff.h"
#include "riffres.h"
#include "hxassert.h"
#include "hxcomm.h"

#include "hxheap.h"
#ifdef _DEBUG
#undef HX_THIS_FILE
static const char HX_THIS_FILE[] = __FILE__;
#endif



#define LIST_CHUNK_ID 0x4c495354    /* 'LIST' */
#define IFF_FILE_MAGIC_NUMBER 0x464f524d  /* 'FORM' */

STDMETHODIMP CRIFFReader::QueryInterface(REFIID riid, void** ppvObj)
{
    QInterfaceList  qiList[] =
    {
	{ GET_IIDHANDLE(IID_IUnknown), this},
	{ GET_IIDHANDLE(IID_IHXFileResponse), (IHXFileResponse*)this},
	{ GET_IIDHANDLE(IID_IHXThreadSafeMethods), (IHXThreadSafeMethods*)this},
    };

    HX_RESULT retVal = ::QIFind(qiList, QILISTSIZE(qiList), riid, ppvObj);
    if (FAILED(retVal) && m_pResponse)
    {
        retVal = m_pResponse->QueryInterface(riid, ppvObj);
    }
    return retVal;
}

/////////////////////////////////////////////////////////////////////////
//  Method:
//  IUnknown::AddRef
//  Purpose:
//  Everyone usually implements this the same... feel free to use
//  this implementation.
//
STDMETHODIMP_(ULONG32) CRIFFReader::AddRef()
{
    return InterlockedIncrement(&m_lRefCount);
}

/////////////////////////////////////////////////////////////////////////
//  Method:
//  IUnknown::Release
//  Purpose:
//  Everyone usually implements this the same... feel free to use
//  this implementation.
//
STDMETHODIMP_(ULONG32) CRIFFReader::Release()
{
    if ( InterlockedDecrement(&m_lRefCount) > 0 )
    {
        return m_lRefCount;
    }

    delete this;
    return 0;
}

CRIFFReader::CRIFFReader(IUnknown* pContext,
                         CRIFFResponse* pResponse,
                         IHXFileObject* pFileObject)
    : m_pReassemblyBuffer(NULL)
    , m_ulChunkBytesRead(0)
    , m_ulChunkSize(0)
{
    m_pContext = pContext;
    m_pResponse = pResponse;
    m_pFileObject = pFileObject;

    if ( m_pFileObject )
    {
        m_pFileObject->AddRef();
    }

    if ( m_pContext )
        m_pContext->AddRef();

    if ( m_pResponse )
        m_pResponse->AddRef();

    m_bFileIsOpen = FALSE;
    m_lRefCount = 0;
    m_pFilename = 0;
    m_ulSizeDiff = 0;
    m_ulThisChunkOffset = 0;

    //Every time we Read() a data chunk and the amount of the Read is
    // odd, we add one to byte-align for the next Read, but we want to
    // know that we did this in ReadDone() so we use the following to
    // keep track so, in ReadDone(), we can reduce the buffer size by
    // one if necessary so the renderer will get just the bytes it
    // needs:
    m_ulFileSpecifiedReadSize = 0;
}

CRIFFReader::~CRIFFReader()
{
    if ( m_bFileIsOpen )
        Close();

    if ( m_pFilename )
    {
        delete [] m_pFilename;
        m_pFilename = 0;
    }
}

HX_RESULT
CRIFFReader::Open(char* filename)
{
    if ( !m_pFileObject )
        return HXR_UNEXPECTED;

    if ( filename )
    {
        m_pFilename = new char[strlen(filename) + 1];
        strcpy(m_pFilename, filename); /* Flawfinder: ignore */
    }
    m_state = RS_InitPending;

    m_ulCurOffset = 0;
    m_levelInfo[0].m_startOffset = 0;
    m_ulLevel = 0;

/*
    if(filename)
    {
    IHXRequest* pRequest;

    if (m_pFileObject->GetRequest(pRequest) == HXR_OK)
    {
        pRequest->SetURL(filename);
        pRequest->Release();
    }
    else
    {
        return HXR_FAILED;
    }
    }
*/

    return m_pFileObject->Init(HX_FILE_READ | HX_FILE_BINARY, this);

//    return HXR_OK;
}

STDMETHODIMP
CRIFFReader::InitDone(HX_RESULT status)
{

    if ( status != HXR_OK )
    {
        m_state = RS_Ready;
        m_pResponse->RIFFOpenDone(status);
        return HXR_OK;
    }

    m_bFileIsOpen = TRUE;

    m_state = RS_GetFileTypePending;
    return m_pFileObject->Read(sizeof(UINT32) * 2);
}

HX_RESULT
CRIFFReader::Close()
{
    if ( m_pFileObject )
    {
        m_pFileObject->Close();
        m_pFileObject->Release();
        m_pFileObject = NULL;
    }

    if ( m_pContext )
    {
        m_pContext->Release();
        m_pContext = NULL;
    }

    if ( m_pResponse )
    {
        m_pResponse->Release();
        m_pResponse = NULL;
    }

    m_bFileIsOpen = FALSE;

    return HXR_OK;
}

HX_RESULT
CRIFFReader::FindChunk(UINT32 id, BOOL bRelative)
{
    m_ulFindChunkId = id;
    m_state = RS_FileStartSeekPending;

    if ( bRelative && m_levelInfo[m_ulLevel].started )
        m_ulSeekOffset = m_levelInfo[m_ulLevel].m_nextChunkOffset;
    else
        m_ulSeekOffset = m_levelInfo[m_ulLevel].m_startOffset;

    m_levelInfo[m_ulLevel].started = TRUE;

    return(m_pFileObject->Seek(m_ulSeekOffset, FALSE) );
}

HX_RESULT
CRIFFReader::GetChunk()
{
    m_state = RS_ReadChunkHeaderPending;
    return(m_pFileObject->Read(sizeof(UINT32) * 2) ); /* Get type and len */
}

STDMETHODIMP
CRIFFReader::ReadDone(HX_RESULT status, IHXBuffer* pBuffer)
{
    UCHAR* buf;
    UINT32 len;
    UINT16 uRem = 0;

    HX_RESULT result = HXR_OK;

    if ( !m_pResponse )
        return HXR_FAIL;

    if ( pBuffer )
        pBuffer->Get(buf, len);
    m_ulCurOffset += len;

    //Keep track of "bytes read" value so CRIFFReader::ReadDone()
    // can know whether or not it needs to decrement by one the size
    // of the buffer it passes off, since some codecs (Intel's ILVC,
    // for one) allow for odd numbered video frame sizes:
    UINT32 ulActualLenOfBuffToUse = len;
    if ( RS_ReadChunkBodyPending == m_state  && pBuffer )
    {
        ulActualLenOfBuffToUse = m_ulFileSpecifiedReadSize;
        if ( len > ulActualLenOfBuffToUse  &&
             len - ulActualLenOfBuffToUse == 1 )
        {
            //Then a Read(n+1) was done becuase n was odd, so
            // make sure buffer has size of n so renderer will
            // get just the bytes it needs:
            pBuffer->SetSize(ulActualLenOfBuffToUse);
        }
    }

    if ( m_ulFileType == RIFF_FILE_MAGIC_NUMBER ||
         m_ulFileType == IFF_FILE_MAGIC_NUMBER )
    {
        // Make sure the offset is aligned(2 bytes)
        uRem = (UINT16)(m_ulCurOffset % 2);
        if ( uRem != 0 )
        {
            m_ulCurOffset += 1;
        }
    }

    switch ( m_state )
    {
        case RS_GetFileTypePending:
            if ( len != sizeof(UINT32) * 2 )
            {
                m_state = RS_Ready;
                m_pResponse->RIFFOpenDone(HXR_FAILED);
                return HXR_UNEXPECTED;
            }

            if ( (UINT32)getlong(buf) == RIFF_FILE_MAGIC_NUMBER )
            {
                m_state = RS_GetActualFileTypePending;
                m_ulFileType = RIFF_FILE_MAGIC_NUMBER;
                m_bLittleEndian = TRUE;
                m_ulChunkBodyLen = GetLong(&buf[4]);
                m_ulSizeDiff = 0;
                m_levelInfo[m_ulLevel].m_nextChunkOffset = m_ulCurOffset + m_ulChunkBodyLen;
                m_pFileObject->Read(sizeof(UINT32));
                return status;
            }
            else if ( (UINT32)getlong(buf) == IFF_FILE_MAGIC_NUMBER )
            {
                m_state = RS_GetActualFileTypePending;
                m_ulFileType = IFF_FILE_MAGIC_NUMBER;
                m_bLittleEndian = FALSE;
                m_ulChunkBodyLen = GetLong(&buf[4]);
                m_ulSizeDiff = 0;
                m_levelInfo[m_ulLevel].m_nextChunkOffset = m_ulCurOffset + m_ulChunkBodyLen;
                m_levelInfo[m_ulLevel].m_startOffset = 12;

                m_pFileObject->Read(sizeof(UINT32));
                return status;
            }
            else
            {
                m_ulFileType = (UINT32)getlong(buf);
                m_bLittleEndian = FALSE;
                m_ulChunkBodyLen = GetLong(&buf[4]);
                m_ulSizeDiff = 8;
                m_levelInfo[m_ulLevel].m_nextChunkOffset = m_ulCurOffset + m_ulChunkBodyLen - 8;
            }

            m_state = RS_Ready;
            result = m_pResponse->RIFFOpenDone(status);
            return(HXR_OK==status? result:status);

        case RS_GetActualFileTypePending:
            if ( len != sizeof(UINT32) )
            {
                m_state = RS_Ready;
                m_pResponse->RIFFOpenDone(HXR_FAILED);
                return HXR_UNEXPECTED;
            }

            m_ulSubFileType = (UINT32)GetLong(buf);
            m_state = RS_Ready;
            result = m_pResponse->RIFFOpenDone(status);
            return(HXR_OK==status? result:status);
        case RS_ChunkHeaderReadPending:
            if ( len != sizeof(UINT32) + sizeof(UINT32) ||
                 (HXR_OK != status) )
            {
                m_state = RS_Ready;
                m_pResponse->RIFFFindChunkDone(HXR_FAILED, 0);
                return HXR_UNEXPECTED;
            }

            if ( (UINT32)getlong(buf) == m_ulFindChunkId )
            {
                // Found the chunk we were asked for
                m_state = RS_Ready;
                m_ulChunkBodyLen = GetLong(&buf[4]);
                // Make sure the body length is aligned(2 bytes)
                if ( m_ulFileType == RIFF_FILE_MAGIC_NUMBER )
                {
                    uRem = (UINT16)(m_ulChunkBodyLen % 2);
                    if ( uRem != 0 )
                    {
                        m_ulChunkBodyLen += 1;
                    }
                }

                m_levelInfo[m_ulLevel].m_nextChunkOffset = m_ulCurOffset + m_ulChunkBodyLen;
                m_ulThisChunkOffset = m_ulCurOffset;