0
|
1 |
// Copyright (c) 2002-2009 Nokia Corporation and/or its subsidiary(-ies).
|
|
2 |
// All rights reserved.
|
|
3 |
// This component and the accompanying materials are made available
|
|
4 |
// under the terms of "Eclipse Public License v1.0"
|
|
5 |
// which accompanies this distribution, and is available
|
|
6 |
// at the URL "http://www.eclipse.org/legal/epl-v10.html".
|
|
7 |
//
|
|
8 |
// Initial Contributors:
|
|
9 |
// Nokia Corporation - initial contribution.
|
|
10 |
//
|
|
11 |
// Contributors:
|
|
12 |
//
|
|
13 |
// Description:
|
|
14 |
//
|
|
15 |
|
|
16 |
#include <mmf/common/mmfcontrollerpluginresolver.h>
|
|
17 |
#include <mmf/server/mmfdatabuffer.h>
|
|
18 |
#include <mmf/common/mmfutilities.h>
|
|
19 |
#include <mmf/server/mmfclip.h>
|
|
20 |
#include <mmf/server/mmffile.h>
|
|
21 |
#include <mmf/server/mmfformat.h>
|
|
22 |
|
|
23 |
//static const TUid KUidMmfPluginInterfaceFormatDecode = {KMmfUidPluginInterfaceFormatDecode};
|
|
24 |
//static const TUid KUidMmfPluginInterfaceFormatEncode = {KMmfUidPluginInterfaceFormatEncode};
|
|
25 |
|
|
26 |
const TInt KMmfHeaderBufferSize = 512 ; //512 bytes read to parse the header
|
|
27 |
|
|
28 |
CMMFFormatDecode* CMMFFormatDecode::CreateFormatL(TUid aUid, MDataSource* aSource)
|
|
29 |
{
|
|
30 |
CMMFFormatDecode* s = REINTERPRET_CAST( CMMFFormatDecode*,
|
|
31 |
REComSession::CreateImplementationL( aUid, _FOFF( CMMFFormatDecode, iDtor_ID_Key),
|
|
32 |
STATIC_CAST( TAny*, aSource ) ) ) ;
|
|
33 |
s->iImplementationUid = aUid;
|
|
34 |
return s;
|
|
35 |
}
|
|
36 |
|
|
37 |
/**
|
|
38 |
Allocates and constructs an ECom format decode object.
|
|
39 |
|
|
40 |
This is used to explicitly instantiate a format decoder where the UID is known. This method might
|
|
41 |
be used by controllers that only support one type of format such that the UID of the format is
|
|
42 |
already known. For example, if an mp3 controller has been instantiated, there is no need for any
|
|
43 |
further format recognition as this has already been performed in the controller instantiation, thus
|
|
44 |
the controller can instantiate an mp3 format directly from it’s UID.
|
|
45 |
|
|
46 |
@param aUid
|
|
47 |
The implementation UID. This is used by Com to create the plugin.
|
|
48 |
@param aSource
|
|
49 |
The controller MDataSource and is the source of the data for the format decode plugin. The
|
|
50 |
format decode plugin is the sink of data for the MDataSource.
|
|
51 |
|
|
52 |
@return If successful, returns the address of the format decode plugin object created. If not successful,
|
|
53 |
leaves with KErrNotFound.
|
|
54 |
*/
|
|
55 |
EXPORT_C CMMFFormatDecode* CMMFFormatDecode::NewL( TUid aUid, MDataSource* aSource )
|
|
56 |
{
|
|
57 |
return CreateFormatL(aUid, aSource);
|
|
58 |
}
|
|
59 |
|
|
60 |
|
|
61 |
|
|
62 |
/**
|
|
63 |
Attempt to locate and instantiate a FormatDecode using a filename or an extension.
|
|
64 |
|
|
65 |
Only the extension is used. If no extension is supplied (no dot is present) the whole of the
|
|
66 |
filename will be treated as the extension.
|
|
67 |
|
|
68 |
If the file already exists, the file header is scanned to find a match in the opaque_data field of
|
|
69 |
the resource file.
|
|
70 |
|
|
71 |
@param aFileName
|
|
72 |
The file name of target file. May be extension only or may include full path.
|
|
73 |
@param aSource
|
|
74 |
The controller's MDataSource. This is the source of the data for the format decode plugin. This must
|
|
75 |
be a CMMFFile source when instantiating a CMMFFormatDecode using a file name.
|
|
76 |
@param aPreferredSupplier
|
|
77 |
If this is provided the list of matching plugins will be further searched for the latest version of a
|
|
78 |
plugin supplied by supplier named.
|
|
79 |
|
|
80 |
@return If successful returns an instantiated CMMFFormatDecode from a plugin. If not successful, leaves with KErrNotFound.
|
|
81 |
*/
|
|
82 |
EXPORT_C CMMFFormatDecode* CMMFFormatDecode::NewL( const TDesC16& aFileName, MDataSource* aSource, const TDesC& aPreferredSupplier )
|
|
83 |
{
|
|
84 |
CMMFFormatDecodePluginSelectionParameters* pluginSelector = CMMFFormatDecodePluginSelectionParameters::NewLC();
|
|
85 |
CMMFFormatSelectionParameters* formatParams = CMMFFormatSelectionParameters::NewLC();
|
|
86 |
formatParams->SetMatchToFileNameL(aFileName);
|
|
87 |
pluginSelector->SetRequiredFormatSupportL(*formatParams);
|
|
88 |
if (aPreferredSupplier.Length() > 0)
|
|
89 |
pluginSelector->SetPreferredSupplierL(aPreferredSupplier, CMMFPluginSelectionParameters::EOnlyPreferredSupplierPluginsReturned);
|
|
90 |
|
|
91 |
// Instantiate this format
|
|
92 |
CMMFFormatDecode* theChosenOne =
|
|
93 |
MMFFormatEcomUtilities::SelectFormatDecodePluginL(*pluginSelector, aSource);
|
|
94 |
|
|
95 |
// Now clean up.
|
|
96 |
CleanupStack::PopAndDestroy(2);//formatParams, pluginSelector
|
|
97 |
|
|
98 |
return theChosenOne;
|
|
99 |
}
|
|
100 |
|
|
101 |
/**
|
|
102 |
Attempt to locate and instantiate a FormatDecode using a filename or an extension.
|
|
103 |
|
|
104 |
Only the extension is used. If no extension is supplied (no dot is present) the whole of the
|
|
105 |
filename will be treated as the extension.
|
|
106 |
|
|
107 |
If the file already exists, the file header is scanned to find a match in the opaque_data field of
|
|
108 |
the resource file.
|
|
109 |
|
|
110 |
@param aFileName
|
|
111 |
The file name of target file. May be extension only or may include full path.
|
|
112 |
@param aSource
|
|
113 |
The controller's MDataSource. This is the source of the data for the format decode plugin. This must
|
|
114 |
be a CMMFFile source when instantiating a CMMFFormatDecode using a file name.
|
|
115 |
@param aPreferredSupplier
|
|
116 |
If this is provided the list of matching plugins will be further searched for the latest version of a
|
|
117 |
plugin supplied by supplier named.
|
|
118 |
@param aSupportsCustomInterfaces
|
|
119 |
Indicates whether the instantiated FormatDecode supports custom interfaces.
|
|
120 |
|
|
121 |
@return If successful returns an instantiated CMMFFormatDecode from a plugin. If not successful, leaves with KErrNotFound.
|
|
122 |
*/
|
|
123 |
EXPORT_C CMMFFormatDecode* CMMFFormatDecode::NewL( const TDesC16& aFileName, MDataSource* aSource, const TDesC& aPreferredSupplier, TBool& aSupportsCustomInterfaces )
|
|
124 |
{
|
|
125 |
CMMFFormatDecodePluginSelectionParameters* pluginSelector = CMMFFormatDecodePluginSelectionParameters::NewLC();
|
|
126 |
CMMFFormatSelectionParameters* formatParams = CMMFFormatSelectionParameters::NewLC();
|
|
127 |
formatParams->SetMatchToFileNameL(aFileName);
|
|
128 |
pluginSelector->SetRequiredFormatSupportL(*formatParams);
|
|
129 |
if (aPreferredSupplier.Length() > 0)
|
|
130 |
pluginSelector->SetPreferredSupplierL(aPreferredSupplier, CMMFPluginSelectionParameters::EOnlyPreferredSupplierPluginsReturned);
|
|
131 |
|
|
132 |
// Instantiate this format
|
|
133 |
CMMFFormatDecode* theChosenOne =
|
|
134 |
MMFFormatEcomUtilities::SelectFormatDecodePluginL(*pluginSelector, aSource, aSupportsCustomInterfaces);
|
|
135 |
|
|
136 |
// Now clean up.
|
|
137 |
CleanupStack::PopAndDestroy(2);//formatParams, pluginSelector
|
|
138 |
|
|
139 |
return theChosenOne;
|
|
140 |
}
|
|
141 |
|
|
142 |
|
|
143 |
/**
|
|
144 |
Attempts to locate and instantiate a CMMFFormatDecode using data in a buffer. The buffer is expected to contain
|
|
145 |
header data (from a file, stream or descriptor).
|
|
146 |
|
|
147 |
Signatures (supplied by the plugin registry information) are sought in aSourceHeader.
|
|
148 |
|
|
149 |
This function uses the match string as a resolver parameter. The format base class uses the match string
|
|
150 |
to find a match to the match string defined in the opaque_data field of the resource file. The
|
|
151 |
match string would typically be a signature for a particular format usually defined in the format header.
|
|
152 |
|
|
153 |
@param aSourceHeader
|
|
154 |
The data which is searched for matching signatures.
|
|
155 |
@param aSource
|
|
156 |
The controller's MDataSource and the source of the data for the format decode plugin.
|
|
157 |
@param aPreferredSupplier
|
|
158 |
If this is provided the list of matching plugins will be further searched for the latest version of a
|
|
159 |
plugin supplied by the specified supplier.
|
|
160 |
|
|
161 |
@return If successful returns an instantiated CMMFFormatDecode from a plugin. If not successful, leaves with KErrNotFound.
|
|
162 |
*/
|
|
163 |
EXPORT_C CMMFFormatDecode* CMMFFormatDecode::NewL( const TDesC8& aSourceHeader, MDataSource* aSource, const TDesC& aPreferredSupplier )
|
|
164 |
{
|
|
165 |
CMMFFormatDecodePluginSelectionParameters* pluginSelector = CMMFFormatDecodePluginSelectionParameters::NewLC();
|
|
166 |
CMMFFormatSelectionParameters* formatParams = CMMFFormatSelectionParameters::NewLC();
|
|
167 |
formatParams->SetMatchToHeaderDataL(aSourceHeader);
|
|
168 |
pluginSelector->SetRequiredFormatSupportL(*formatParams);
|
|
169 |
if (aPreferredSupplier.Length() > 0)
|
|
170 |
pluginSelector->SetPreferredSupplierL(aPreferredSupplier, CMMFPluginSelectionParameters::EOnlyPreferredSupplierPluginsReturned);
|
|
171 |
|
|
172 |
// Instantiate this format
|
|
173 |
CMMFFormatDecode* theChosenOne =
|
|
174 |
MMFFormatEcomUtilities::SelectFormatDecodePluginL(*pluginSelector, aSource);
|
|
175 |
|
|
176 |
// Now clean up.
|
|
177 |
CleanupStack::PopAndDestroy(2);//formatParams, pluginSelector
|
|
178 |
|
|
179 |
return theChosenOne;
|
|
180 |
}
|
|
181 |
|
|
182 |
/**
|
|
183 |
Attempts to locate and instantiate a CMMFFormatDecode using data in a buffer. The buffer is expected to contain
|
|
184 |
header data (from a file, stream or descriptor).
|
|
185 |
|
|
186 |
Signatures (supplied by the plugin registry information) are sought in aSourceHeader.
|
|
187 |
|
|
188 |
This function uses the match string as a resolver parameter. The format base class uses the match string
|
|
189 |
to find a match to the match string defined in the opaque_data field of the resource file. The
|
|
190 |
match string would typically be a signature for a particular format usually defined in the format header.
|
|
191 |
|
|
192 |
@param aSourceHeader
|
|
193 |
The data which is searched for matching signatures.
|
|
194 |
@param aSource
|
|
195 |
The controller's MDataSource and the source of the data for the format decode plugin.
|
|
196 |
@param aPreferredSupplier
|
|
197 |
If this is provided the list of matching plugins will be further searched for the latest version of a
|
|
198 |
plugin supplied by the specified supplier.
|
|
199 |
@param aSupportsCustomInterfaces
|
|
200 |
Indicates whether the instantiated FormatDecode supports custom interfaces.
|
|
201 |
|
|
202 |
@return If successful returns an instantiated CMMFFormatDecode from a plugin. If not successful, leaves with KErrNotFound.
|
|
203 |
*/
|
|
204 |
EXPORT_C CMMFFormatDecode* CMMFFormatDecode::NewL( const TDesC8& aSourceHeader, MDataSource* aSource, const TDesC& aPreferredSupplier, TBool& aSupportsCustomInterfaces )
|
|
205 |
{
|
|
206 |
CMMFFormatDecodePluginSelectionParameters* pluginSelector = CMMFFormatDecodePluginSelectionParameters::NewLC();
|
|
207 |
CMMFFormatSelectionParameters* formatParams = CMMFFormatSelectionParameters::NewLC();
|
|
208 |
formatParams->SetMatchToHeaderDataL(aSourceHeader);
|
|
209 |
pluginSelector->SetRequiredFormatSupportL(*formatParams);
|
|
210 |
if (aPreferredSupplier.Length() > 0)
|
|
211 |
pluginSelector->SetPreferredSupplierL(aPreferredSupplier, CMMFPluginSelectionParameters::EOnlyPreferredSupplierPluginsReturned);
|
|
212 |
|
|
213 |
// Instantiate this format
|
|
214 |
CMMFFormatDecode* theChosenOne =
|
|
215 |
MMFFormatEcomUtilities::SelectFormatDecodePluginL(*pluginSelector, aSource, aSupportsCustomInterfaces);
|
|
216 |
|
|
217 |
// Now clean up.
|
|
218 |
CleanupStack::PopAndDestroy(2);//formatParams, pluginSelector
|
|
219 |
|
|
220 |
return theChosenOne;
|
|
221 |
}
|
|
222 |
|
|
223 |
/**
|
|
224 |
Attempts to locate and instantiate a CMMFFormatDecode using data from MDataSource.
|
|
225 |
|
|
226 |
The data is expected to contain header data (from a file, stream or descriptor). Signatures
|
|
227 |
(supplied by the plugin registry information) are sought in aSource.
|
|
228 |
|
|
229 |
@param aSource
|
|
230 |
Header data. Must be derived from CMMFClip.
|
|
231 |
@param aPreferredSupplier
|
|
232 |
If this is provided, the list of matching plugins will be further searched for the latest version of a
|
|
233 |
plugin supplied by the specified supplier.
|
|
234 |
|
|
235 |
@return If successful returns an instantiated CMMFFormatDecode from a plugin. If not successful, leaves with KErrNotFound.
|
|
236 |
*/
|
|
237 |
EXPORT_C CMMFFormatDecode* CMMFFormatDecode::NewL( MDataSource* aSource, const TDesC& aPreferredSupplier )
|
|
238 |
{
|
|
239 |
// Read header data from aSource. Call source header version
|
|
240 |
|
|
241 |
if ( !( (aSource->DataSourceType() == KUidMmfFileSource ) || ( aSource->DataSourceType() == KUidMmfDescriptorSource) ) )
|
|
242 |
User::Leave( KErrNotSupported ) ;
|
|
243 |
|
|
244 |
CMMFDataBuffer* buffer = CMMFDataBuffer::NewL(KMmfHeaderBufferSize) ;
|
|
245 |
CleanupStack::PushL( buffer ) ;
|
|
246 |
|
|
247 |
aSource->SourcePrimeL();
|
|
248 |
TCleanupItem srcCleanupItem(DoDataSourceStop, aSource);
|
|
249 |
CleanupStack::PushL(srcCleanupItem);
|
|
250 |
|
|
251 |
STATIC_CAST( CMMFClip*, aSource )->ReadBufferL( buffer, 0 ) ;
|
|
252 |
|
|
253 |
CleanupStack::Pop();
|
|
254 |
aSource->SourceStopL();
|
|
255 |
|
|
256 |
// attempt to instantiate the format by header data
|
|
257 |
// if this fails, try using the file extension
|
|
258 |
CMMFFormatDecode* ret = NULL;
|
|
259 |
TInt err, errFile;
|
|
260 |
TRAP(err, ret = NewL( buffer->Data(), aSource, aPreferredSupplier ));
|
|
261 |
if (err != KErrNone && aSource->DataSourceType() == KUidMmfFileSource)
|
|
262 |
{
|
|
263 |
CMMFFile* mmfFile = static_cast<CMMFFile*> (aSource);
|
|
264 |
TRAP(errFile, ret = NewL( mmfFile->FullName(), aSource, aPreferredSupplier ));
|
|
265 |
if (errFile == KErrNone)
|
|
266 |
err = errFile;
|
|
267 |
}
|
|
268 |
User::LeaveIfError(err);
|
|
269 |
|
|
270 |
CleanupStack::PopAndDestroy() ; // buffer
|
|
271 |
return ret ;
|
|
272 |
|
|
273 |
}
|
|
274 |
|
|
275 |
/**
|
|
276 |
Attempts to locate and instantiate a CMMFFormatDecode using data from MDataSource.
|
|
277 |
|
|
278 |
The data is expected to contain header data (from a file, stream or descriptor). Signatures
|
|
279 |
(supplied by the plugin registry information) are sought in aSource.
|
|
280 |
|
|
281 |
@param aSource
|
|
282 |
Header data. Must be derived from CMMFClip.
|
|
283 |
@param aPreferredSupplier
|
|
284 |
If this is provided, the list of matching plugins will be further searched for the latest version of a
|
|
285 |
plugin supplied by the specified supplier.
|
|
286 |
@param aSupportsCustomInterfaces
|
|
287 |
Indicates whether the instantiated FormatDecode supports custom interfaces.
|
|
288 |
|
|
289 |
@return If successful returns an instantiated CMMFFormatDecode from a plugin. If not successful, leaves with KErrNotFound.
|
|
290 |
*/
|
|
291 |
EXPORT_C CMMFFormatDecode* CMMFFormatDecode::NewL( MDataSource* aSource, const TDesC& aPreferredSupplier, TBool& aSupportsCustomInterfaces )
|
|
292 |
{
|
|
293 |
// Read header data from aSource. Call source header version
|
|
294 |
|
|
295 |
if ( !( (aSource->DataSourceType() == KUidMmfFileSource ) || ( aSource->DataSourceType() == KUidMmfDescriptorSource) ) )
|
|
296 |
User::Leave( KErrNotSupported ) ;
|
|
297 |
|
|
298 |
CMMFDataBuffer* buffer = CMMFDataBuffer::NewL(KMmfHeaderBufferSize) ;
|
|
299 |
CleanupStack::PushL( buffer ) ;
|
|
300 |
|
|
301 |
aSource->SourcePrimeL();
|
|
302 |
TCleanupItem srcCleanupItem(DoDataSourceStop, aSource);
|
|
303 |
CleanupStack::PushL(srcCleanupItem);
|
|
304 |
|
|
305 |
STATIC_CAST( CMMFClip*, aSource )->ReadBufferL( buffer, 0 ) ;
|
|
306 |
|
|
307 |
CleanupStack::Pop();
|
|
308 |
aSource->SourceStopL();
|
|
309 |
|
|
310 |
// attempt to instantiate the format by header data
|
|
311 |
// if this fails, try using the file extension
|
|
312 |
CMMFFormatDecode* ret = NULL;
|
|
313 |
TInt err, errFile;
|
|
314 |
TRAP(err, ret = NewL( buffer->Data(), aSource, aPreferredSupplier, aSupportsCustomInterfaces ));
|
|
315 |
if (err != KErrNone && aSource->DataSourceType() == KUidMmfFileSource)
|
|
316 |
{
|
|
317 |
CMMFFile* mmfFile = static_cast<CMMFFile*> (aSource);
|
|
318 |
TRAP(errFile, ret = NewL( mmfFile->FullName(), aSource, aPreferredSupplier, aSupportsCustomInterfaces ));
|
|
319 |
if (errFile == KErrNone)
|
|
320 |
err = errFile;
|
|
321 |
}
|
|
322 |
User::LeaveIfError(err);
|
|
323 |
|
|
324 |
CleanupStack::PopAndDestroy() ; // buffer
|
|
325 |
return ret ;
|
|
326 |
|
|
327 |
}
|
|
328 |
|
|
329 |
CMMFFormatEncode* CMMFFormatEncode::CreateFormatL(TUid aUid, MDataSink* aSink)
|
|
330 |
{
|
|
331 |
CMMFFormatEncode* s = REINTERPRET_CAST( CMMFFormatEncode*,
|
|
332 |
REComSession::CreateImplementationL( aUid, _FOFF( CMMFFormatEncode, iDtor_ID_Key ),
|
|
333 |
STATIC_CAST( TAny*, aSink ) ) ) ;
|
|
334 |
s->iImplementationUid = aUid;
|
|
335 |
return s;
|
|
336 |
}
|
|
337 |
|
|
338 |
/**
|
|
339 |
Allocates and constructs an ECom format encode object.
|
|
340 |
|
|
341 |
@param aUid
|
|
342 |
The implementation UID.
|
|
343 |
@param aSink
|
|
344 |
The data sink.
|
|
345 |
|
|
346 |
@return If successful, returns the address of the format decode plugin object created. If not successful,
|
|
347 |
leaves with KErrNotFound.
|
|
348 |
*/
|
|
349 |
EXPORT_C CMMFFormatEncode* CMMFFormatEncode::NewL( TUid aUid, MDataSink* aSink )
|
|
350 |
{
|
|
351 |
return CreateFormatL(aUid, aSink);
|
|
352 |
}
|
|
353 |
|
|
354 |
/**
|
|
355 |
Attempts to locate and instantiate a CMMFFormatEncode using a filename or an extension.
|
|
356 |
|
|
357 |
Only the extension of the supplied file name is used. If no extension is supplied (ie. no dot is present)
|
|
358 |
the whole of the filename will be treated as the extension.
|
|
359 |
|
|
360 |
@param aFileName
|
|
361 |
File name of target file. May be extension only or may include the full path.
|
|
362 |
@param aSink
|
|
363 |
The data source.
|
|
364 |
@param aPreferredSupplier
|
|
365 |
If this is provided, the list of matching plugins will be further searched for the latest version of a
|
|
366 |
plugin supplied by supplier named.
|
|
367 |
|
|
368 |
@return If successful, returns the address of the format decode plugin object created. If not successful,
|
|
369 |
leaves with KErrNotFound.
|
|
370 |
*/
|
|
371 |
EXPORT_C CMMFFormatEncode* CMMFFormatEncode::NewL( const TDesC16& aFileName, MDataSink* aSink, const TDesC& aPreferredSupplier )
|
|
372 |
{
|
|
373 |
CMMFFormatEncodePluginSelectionParameters* pluginSelector = CMMFFormatEncodePluginSelectionParameters::NewLC();
|
|
374 |
CMMFFormatSelectionParameters* formatParams = CMMFFormatSelectionParameters::NewLC();
|
|
375 |
formatParams->SetMatchToFileNameL(aFileName);
|
|
376 |
pluginSelector->SetRequiredFormatSupportL(*formatParams);
|
|
377 |
if (aPreferredSupplier.Length() > 0)
|
|
378 |
pluginSelector->SetPreferredSupplierL(aPreferredSupplier, CMMFPluginSelectionParameters::EOnlyPreferredSupplierPluginsReturned);
|
|
379 |
|
|
380 |
TUid chosenUid = MMFFormatEcomUtilities::SelectFormatPluginL(*pluginSelector);
|
|
381 |
|
|
382 |
// Instantiate this format
|
|
383 |
CMMFFormatEncode* theChosenOne = CreateFormatL(chosenUid, aSink);
|
|
384 |
|
|
385 |
// Now clean up.
|
|
386 |
CleanupStack::PopAndDestroy(2);//formatParams, pluginSelector
|
|
387 |
|
|
388 |
return theChosenOne;
|
|
389 |
}
|
|
390 |
|
|
391 |
/**
|
|
392 |
Attempts to locate and instantiate a CMMFFormatEncode using data in the specified buffer.
|
|
393 |
|
|
394 |
The buffer is expected to contain header data (from a file, stream or descriptor).
|
|
395 |
Signatures (supplied by the plugin registry information) are sought in aSourceHeader.
|
|
396 |
|
|
397 |
@param aSourceHeader
|
|
398 |
The data which is searched for matching signatures.
|
|
399 |
@param aSink
|
|
400 |
The data sink.
|
|
401 |
@param aPreferredSupplier
|
|
402 |
If this is provided the list of matching plugins will be further searched for the latest version of a
|
|
403 |
plugin supplied by supplier named.
|
|
404 |
|
|
405 |
@return If successful, returns the address of the format decode plugin object created. If not successful,
|
|
406 |
leaves with KErrNotFound.
|
|
407 |
*/
|
|
408 |
EXPORT_C CMMFFormatEncode* CMMFFormatEncode::NewL( const TDesC8& aSourceHeader, MDataSink* aSink, const TDesC& aPreferredSupplier )
|
|
409 |
{
|
|
410 |
CMMFFormatEncodePluginSelectionParameters* pluginSelector = CMMFFormatEncodePluginSelectionParameters::NewLC();
|
|
411 |
CMMFFormatSelectionParameters* formatParams = CMMFFormatSelectionParameters::NewLC();
|
|
412 |
formatParams->SetMatchToHeaderDataL(aSourceHeader);
|
|
413 |
pluginSelector->SetRequiredFormatSupportL(*formatParams);
|
|
414 |
if (aPreferredSupplier.Length() > 0)
|
|
415 |
pluginSelector->SetPreferredSupplierL(aPreferredSupplier, CMMFPluginSelectionParameters::EOnlyPreferredSupplierPluginsReturned);
|
|
416 |
|
|
417 |
TUid chosenUid = MMFFormatEcomUtilities::SelectFormatPluginL(*pluginSelector);
|
|
418 |
|
|
419 |
// Instantiate this format
|
|
420 |
CMMFFormatEncode* theChosenOne = CreateFormatL(chosenUid, aSink);
|
|
421 |
|
|
422 |
// Now clean up.
|
|
423 |
CleanupStack::PopAndDestroy(2);//formatParams, pluginSelector
|
|
424 |
|
|
425 |
return theChosenOne;
|
|
426 |
}
|
|
427 |
|
|
428 |
/**
|
|
429 |
Attempts to locate and instantiate a CMMFFormatEncode using data from aSink.
|
|
430 |
|
|
431 |
The data is expected to contain header data (from a file, stream or descriptor).
|
|
432 |
Signatures (supplied by the plugin registry information) are sought in the source header.
|
|
433 |
|
|
434 |
@param aSink
|
|
435 |
The header data. Must be derived from CMMFClip.
|
|
436 |
@param aPreferredSupplier
|
|
437 |
If this is provided, the list of matching plugins will be further searched for the latest version of a
|
|
438 |
plugin supplied by supplier specified.
|
|
439 |
|
|
440 |
@return If successful, returns the address of the format decode plugin object created. If not successful,
|
|
441 |
leaves with KErrNotFound.
|
|
442 |
*/
|
|
443 |
EXPORT_C CMMFFormatEncode* CMMFFormatEncode::NewL( MDataSink* aSink, const TDesC& aPreferredSupplier )
|
|
444 |
{
|
|
445 |
// Read header data from aSource. Call source header version if there is header data, file name version otherwise.
|
|
446 |
|
|
447 |
if ( !( (aSink->DataSinkType() == KUidMmfFileSink ) || ( aSink->DataSinkType() == KUidMmfDescriptorSink) ) )
|
|
448 |
User::Leave( KErrNotSupported ) ;
|
|
449 |
|
|
450 |
CMMFDataBuffer* buffer = CMMFDataBuffer::NewL(KMmfHeaderBufferSize) ;
|
|
451 |
CleanupStack::PushL( buffer ) ;
|
|
452 |
|
|
453 |
aSink->SinkPrimeL();
|
|
454 |
TCleanupItem sinkCleanupItem(DoDataSinkStop, aSink);
|
|
455 |
CleanupStack::PushL(sinkCleanupItem);
|
|
456 |
|
|
457 |
STATIC_CAST( CMMFClip*, aSink )->ReadBufferL( buffer, 0 ) ;
|
|
458 |
|
|
459 |
CleanupStack::Pop();
|
|
460 |
aSink->SinkStopL();
|
|
461 |
|
|
462 |
CMMFFormatEncode* ret = NULL ; // set to null to avoid compiler warning.
|
|
463 |
// Check for data in the buffer
|
|
464 |
if ( buffer->BufferSize() != 0 )
|
|
465 |
ret = NewL( buffer->Data(), aSink, aPreferredSupplier ) ;
|
|
466 |
else if ( aSink->DataSinkType() == KUidMmfFileSink )
|
|
467 |
ret = NewL( STATIC_CAST(CMMFFile*, aSink)->Extension(), aSink, aPreferredSupplier ) ;
|
|
468 |
else
|
|
469 |
User::Leave( KErrNotSupported ) ;
|
|
470 |
|
|
471 |
CleanupStack::PopAndDestroy() ; // buffer
|
|
472 |
return ret ;
|
|
473 |
}
|
|
474 |
|
|
475 |
|
|
476 |
TUid MMFFormatEcomUtilities::SelectFormatPluginL(const CMMFFormatPluginSelectionParameters& aSelectParams)
|
|
477 |
{
|
|
478 |
RMMFFormatImplInfoArray pluginArray;
|
|
479 |
CleanupResetAndDestroyPushL(pluginArray);
|
|
480 |
aSelectParams.ListImplementationsL(pluginArray);
|
|
481 |
|
|
482 |
// Just leave if no implementations were found
|
|
483 |
if (pluginArray.Count() == 0)
|
|
484 |
User::Leave(KErrNotSupported);
|
|
485 |
|
|
486 |
// Return the uid of the first plugin in the list
|
|
487 |
TUid ret = pluginArray[0]->Uid();
|
|
488 |
CleanupStack::PopAndDestroy();//pluginArray
|
|
489 |
return ret;
|
|
490 |
}
|
|
491 |
|
|
492 |
/*
|
|
493 |
* instantiate each format decode plugin in turn until we find one that works
|
|
494 |
*/
|
|
495 |
CMMFFormatDecode* MMFFormatEcomUtilities::SelectFormatDecodePluginL(const CMMFFormatPluginSelectionParameters& aSelectParams, MDataSource* aSource)
|
|
496 |
{
|
|
497 |
RMMFFormatImplInfoArray pluginArray;
|
|
498 |
CleanupResetAndDestroyPushL(pluginArray);
|
|
499 |
aSelectParams.ListImplementationsL(pluginArray);
|
|
500 |
|
|
501 |
TInt pluginCount = pluginArray.Count();
|
|
502 |
CMMFFormatDecode* theChosenOne = NULL;
|
|
503 |
|
|
504 |
TInt err = KErrNotSupported;
|
|
505 |
for (TInt n=0; n<pluginCount; n++)
|
|
506 |
{
|
|
507 |
// Try to instantiate this format
|
|
508 |
TRAP(err, theChosenOne = CMMFFormatDecode::NewL(pluginArray[n]->Uid(), aSource));
|
|
509 |
// Ensure OOM or any unexpected error is caught immediately
|
|
510 |
// i.e. don't try the next plugin
|
|
511 |
if (err != KErrNotSupported && err != KErrCorrupt && err != KErrArgument)
|
|
512 |
break;
|
|
513 |
}
|
|
514 |
User::LeaveIfError(err);
|
|
515 |
|
|
516 |
CleanupStack::PopAndDestroy(&pluginArray);
|
|
517 |
|
|
518 |
return theChosenOne;
|
|
519 |
}
|
|
520 |
|
|
521 |
/*
|
|
522 |
* instantiate each format decode plugin in turn until we find one that works
|
|
523 |
*/
|
|
524 |
CMMFFormatDecode* MMFFormatEcomUtilities::SelectFormatDecodePluginL(const CMMFFormatPluginSelectionParameters& aSelectParams, MDataSource* aSource, TBool& aSupportsCustomInterfaces)
|
|
525 |
{
|
|
526 |
RMMFFormatImplInfoArray pluginArray;
|
|
527 |
CleanupResetAndDestroyPushL(pluginArray);
|
|
528 |
aSelectParams.ListImplementationsL(pluginArray);
|
|
529 |
|
|
530 |
TInt pluginCount = pluginArray.Count();
|
|
531 |
CMMFFormatDecode* theChosenOne = NULL;
|
|
532 |
|
|
533 |
TInt err = KErrNotSupported;
|
|
534 |
CMMFFormatImplementationInformation* implInfo = NULL;
|
|
535 |
for (TInt n=0; n<pluginCount; n++)
|
|
536 |
{
|
|
537 |
implInfo = pluginArray[n];
|
|
538 |
// Try to instantiate this format
|
|
539 |
TRAP(err, theChosenOne = CMMFFormatDecode::NewL(implInfo->Uid(), aSource));
|
|
540 |
// Ensure OOM or any unexpected error is caught immediately
|
|
541 |
// i.e. don't try the next plugin
|
|
542 |
if (err != KErrNotSupported && err != KErrCorrupt && err != KErrArgument)
|
|
543 |
break;
|
|
544 |
}
|
|
545 |
User::LeaveIfError(err);
|
|
546 |
aSupportsCustomInterfaces = implInfo->SupportsCustomInterfaces();
|
|
547 |
|
|
548 |
CleanupStack::PopAndDestroy(&pluginArray);
|
|
549 |
|
|
550 |
return theChosenOne;
|
|
551 |
}
|
|
552 |
|