1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
|
// =================================================================================================
// Copyright Adobe
// Copyright 2005 Adobe
// 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 "source/IOUtils.hpp"
#include "XMPFiles/source/FileHandlers/MPEG2_Handler.hpp"
#include "../FormatSupport/PackageFormat_Support.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;
XMP_StringPtr filePath = this->parent->GetFilePath().c_str();
XMP_StringPtr extPtr = FindFileExtension ( filePath );
this->sidecarPath.assign ( filePath, (extPtr - filePath) );
this->sidecarPath += ".xmp";
} // 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 )
{
if ( ! Host_IO::Exists ( this->sidecarPath.c_str() ) ) return false;
return Host_IO::GetModifyDate ( this->sidecarPath.c_str(), modDate );
} // MPEG2_MetaHandler::GetFileModDate
// =================================================================================================
// MPEG2_MetaHandler::FillAssociatedResources
// =================================
void MPEG2_MetaHandler::FillAssociatedResources ( std::vector<std::string> * resourceList )
{
resourceList->push_back(this->parent->GetFilePath());
PackageFormat_Support::AddResourceIfExists(resourceList, this->sidecarPath);
} // MPEG2_MetaHandler::FillAssociatedResources
// =================================================================================================
// MPEG2_MetaHandler::IsMetadataWritable
// =================================
bool MPEG2_MetaHandler::IsMetadataWritable ( )
{
return Host_IO::Writable( this->sidecarPath.c_str(), true );
} // MPEG2_MetaHandler::IsMetadataWritable
// =================================================================================================
// 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.
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
|
