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// =================================================================================================
// ADOBE SYSTEMS INCORPORATED
// Copyright 2005 Adobe Systems Incorporated
// All Rights Reserved
//
// NOTICE: Adobe permits you to use, modify, and distribute this file in accordance with the terms
// of the Adobe license agreement accompanying it.
// =================================================================================================
#if XMP_WinBuild
#pragma warning ( disable : 4996 ) // '...' was declared deprecated
#endif
#include "public/include/XMP_Environment.h" // ! XMP_Environment.h must be the first included header.
#include "public/include/XMP_Const.h"
#include "public/include/XMP_IO.hpp"
#include "XMPFiles/source/XMPFiles_Impl.hpp"
#include "source/XMPFiles_IO.hpp"
#include "source/XIO.hpp"
#include "XMPFiles/source/FileHandlers/MPEG2_Handler.hpp"
using namespace std;
// =================================================================================================
/// \file MPEG2_Handler.cpp
/// \brief File format handler for MPEG2.
///
/// BLECH! YUCK! GAG! MPEG-2 is done using a sidecar and recognition only by file extension! BARF!!!!!
///
// =================================================================================================
// =================================================================================================
// FindFileExtension
// =================
static inline XMP_StringPtr FindFileExtension ( XMP_StringPtr filePath )
{
XMP_StringPtr pathEnd = filePath + strlen(filePath);
XMP_StringPtr extPtr;
for ( extPtr = pathEnd-1; extPtr > filePath; --extPtr ) {
if ( (*extPtr == '.') || (*extPtr == '/') ) break;
#if XMP_WinBuild
if ( (*extPtr == '\\') || (*extPtr == ':') ) break;
#endif
}
if ( (extPtr < filePath) || (*extPtr != '.') ) return pathEnd;
return extPtr;
} // FindFileExtension
// =================================================================================================
// MPEG2_MetaHandlerCTor
// =====================
XMPFileHandler * MPEG2_MetaHandlerCTor ( XMPFiles * parent )
{
return new MPEG2_MetaHandler ( parent );
} // MPEG2_MetaHandlerCTor
// =================================================================================================
// MPEG2_CheckFormat
// =================
// The MPEG-2 handler uses just the file extension, not the file content. Worse yet, it also uses a
// sidecar file for the XMP. This works better if the handler owns the file, we open the sidecar
// instead of the actual MPEG-2 file.
bool MPEG2_CheckFormat ( XMP_FileFormat format,
XMP_StringPtr filePath,
XMP_IO* fileRef,
XMPFiles * parent )
{
IgnoreParam(format); IgnoreParam(filePath); IgnoreParam(fileRef);
XMP_Assert ( (format == kXMP_MPEGFile) || (format == kXMP_MPEG2File) );
XMP_Assert ( fileRef == 0 );
return ( (parent->format == kXMP_MPEGFile) || (parent->format == kXMP_MPEG2File) ); // ! Just use the first call's format hint.
} // MPEG2_CheckFormat
// =================================================================================================
// MPEG2_MetaHandler::MPEG2_MetaHandler
// ====================================
MPEG2_MetaHandler::MPEG2_MetaHandler ( XMPFiles * _parent )
{
this->parent = _parent;
this->handlerFlags = kMPEG2_HandlerFlags;
this->stdCharForm = kXMP_Char8Bit;
} // MPEG2_MetaHandler::MPEG2_MetaHandler
// =================================================================================================
// MPEG2_MetaHandler::~MPEG2_MetaHandler
// =====================================
MPEG2_MetaHandler::~MPEG2_MetaHandler()
{
// Nothing to do.
} // MPEG2_MetaHandler::~MPEG2_MetaHandler
// =================================================================================================
// MPEG2_MetaHandler::GetFileModDate
// =================================
bool MPEG2_MetaHandler::GetFileModDate ( XMP_DateTime * modDate )
{
XMP_StringPtr filePath = this->parent->filePath.c_str();
XMP_StringPtr extPtr = FindFileExtension ( filePath );
this->sidecarPath.assign ( filePath, (extPtr - filePath) );
this->sidecarPath += ".xmp";
if ( ! Host_IO::Exists ( this->sidecarPath.c_str() ) ) return false;
return Host_IO::GetModifyDate ( this->sidecarPath.c_str(), modDate );
} // MPEG2_MetaHandler::GetFileModDate
// =================================================================================================
// MPEG2_MetaHandler::CacheFileData
// ================================
void MPEG2_MetaHandler::CacheFileData()
{
bool readOnly = (! (this->parent->openFlags & kXMPFiles_OpenForUpdate));
if ( this->parent->UsesClientIO() ) {
XMP_Throw ( "MPEG2 cannot be used with client-managed I/O", kXMPErr_InternalFailure );
}
this->containsXMP = false;
this->processedXMP = true; // Whatever we do here is all that we do for XMPFiles::OpenFile.
// Try to open the sidecar XMP file. Tolerate an open failure, there might not be any XMP.
// Note that MPEG2_CheckFormat can't save the sidecar path because the handler doesn't exist then.
XMP_StringPtr filePath = this->parent->filePath.c_str();
XMP_StringPtr extPtr = FindFileExtension ( filePath );
this->sidecarPath.assign ( filePath, (extPtr - filePath) );
this->sidecarPath += ".xmp";
if ( ! Host_IO::Exists ( this->sidecarPath.c_str() ) ) return; // OK to not have XMP.
XMPFiles_IO * localFile = XMPFiles_IO::New_XMPFiles_IO ( this->sidecarPath.c_str(), readOnly );
if ( localFile == 0 ) XMP_Throw ( "Failure opening MPEG-2 XMP file", kXMPErr_ExternalFailure );
this->parent->ioRef = localFile;
// Extract the sidecar's contents and parse.
this->packetInfo.offset = 0; // We take the whole sidecar file.
this->packetInfo.length = (XMP_Int32) localFile->Length();
if ( this->packetInfo.length > 0 ) {
this->xmpPacket.assign ( this->packetInfo.length, ' ' );
localFile->ReadAll ( (void*)this->xmpPacket.c_str(), this->packetInfo.length );
this->xmpObj.ParseFromBuffer ( this->xmpPacket.c_str(), (XMP_StringLen)this->xmpPacket.size() );
this->containsXMP = true;
}
if ( readOnly ) {
localFile->Close();
delete localFile;
this->parent->ioRef = 0;
}
} // MPEG2_MetaHandler::CacheFileData
// =================================================================================================
// MPEG2_MetaHandler::UpdateFile
// =============================
void MPEG2_MetaHandler::UpdateFile ( bool doSafeUpdate )
{
if ( ! this->needsUpdate ) return;
XMP_Assert ( this->parent->UsesLocalIO() );
if ( this->parent->ioRef == 0 ) {
XMP_Assert ( ! Host_IO::Exists ( this->sidecarPath.c_str() ) );
Host_IO::Create ( this->sidecarPath.c_str() );
this->parent->ioRef = XMPFiles_IO::New_XMPFiles_IO ( this->sidecarPath.c_str(), Host_IO::openReadWrite );
if ( this->parent->ioRef == 0 ) XMP_Throw ( "Failure opening MPEG-2 XMP file", kXMPErr_ExternalFailure );
}
XMP_IO* fileRef = this->parent->ioRef;
XMP_Assert ( fileRef != 0 );
XIO::ReplaceTextFile ( fileRef, this->xmpPacket, doSafeUpdate );
XMPFiles_IO* localFile = (XMPFiles_IO*)fileRef;
localFile->Close();
delete localFile;
this->parent->ioRef = 0;
this->needsUpdate = false;
} // MPEG2_MetaHandler::UpdateFile
// =================================================================================================
// MPEG2_MetaHandler::WriteTempFile
// ================================
void MPEG2_MetaHandler::WriteTempFile ( XMP_IO* tempRef )
{
IgnoreParam(tempRef);
XMP_Throw ( "MPEG2_MetaHandler::WriteTempFile: Should never be called", kXMPErr_Unavailable );
} // MPEG2_MetaHandler::WriteTempFile
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