dlls/windowscodecs/metadatahandler.c

   1 /*
   2  * Copyright 2012 Vincent Povirk for CodeWeavers
   3  * Copyright 2012 Dmitry Timoshkov
   4  *
   5  * This library is free software; you can redistribute it and/or
   6  * modify it under the terms of the GNU Lesser General Public
   7  * License as published by the Free Software Foundation; either
   8  * version 2.1 of the License, or (at your option) any later version.
   9  *
  10  * This library is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * Lesser General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU Lesser General Public
  16  * License along with this library; if not, write to the Free Software
  17  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  18  */
  19
  20 #include <stdarg.h>
  21 #include <stdio.h>
  22
  23 #define COBJMACROS
  24 #define NONAMELESSUNION
  25
  26 #include "windef.h"
  27 #include "winbase.h"
  28 #include "winternl.h"
  29 #include "objbase.h"
  30 #include "propvarutil.h"
  31
  32 #include "wincodecs_private.h"
  33
  34 #include "wine/debug.h"
  35
  36 WINE_DEFAULT_DEBUG_CHANNEL(wincodecs);
  37
  38 typedef struct MetadataHandler {
  39     IWICMetadataWriter IWICMetadataWriter_iface;
  40     LONG ref;
  41     IWICPersistStream IWICPersistStream_iface;
  42     const MetadataHandlerVtbl *vtable;
  43     MetadataItem *items;
  44     DWORD item_count;
  45     CRITICAL_SECTION lock;
  46 } MetadataHandler;
  47
  48 static inline MetadataHandler *impl_from_IWICMetadataWriter(IWICMetadataWriter *iface)
  49 {
  50     return CONTAINING_RECORD(iface, MetadataHandler, IWICMetadataWriter_iface);
  51 }
  52
  53 static inline MetadataHandler *impl_from_IWICPersistStream(IWICPersistStream *iface)
  54 {
  55     return CONTAINING_RECORD(iface, MetadataHandler, IWICPersistStream_iface);
  56 }
  57
  58 static void MetadataHandler_FreeItems(MetadataHandler *This)
  59 {
  60     DWORD i;
  61
  62     for (i=0; i<This->item_count; i++)
  63     {
  64         PropVariantClear(&This->items[i].schema);
  65         PropVariantClear(&This->items[i].id);
  66         PropVariantClear(&This->items[i].value);
  67     }
  68
  69     HeapFree(GetProcessHeap(), 0, This->items);
  70 }
  71
  72 static HRESULT MetadataHandlerEnum_Create(MetadataHandler *parent, DWORD index,
  73     IWICEnumMetadataItem **ppIEnumMetadataItem);
  74
  75 static HRESULT WINAPI MetadataHandler_QueryInterface(IWICMetadataWriter *iface, REFIID iid,
  76     void **ppv)
  77 {
  78     MetadataHandler *This = impl_from_IWICMetadataWriter(iface);
  79     TRACE("(%p,%s,%p)\n", iface, debugstr_guid(iid), ppv);
  80
  81     if (!ppv) return E_INVALIDARG;
  82
  83     if (IsEqualIID(&IID_IUnknown, iid) ||
  84         IsEqualIID(&IID_IWICMetadataReader, iid) ||
  85         (IsEqualIID(&IID_IWICMetadataWriter, iid) && This->vtable->is_writer))
  86     {
  87         *ppv = &This->IWICMetadataWriter_iface;
  88     }
  89     else if (IsEqualIID(&IID_IPersist, iid) ||
  90              IsEqualIID(&IID_IPersistStream, iid) ||
  91              IsEqualIID(&IID_IWICPersistStream, iid))
  92     {
  93         *ppv = &This->IWICPersistStream_iface;
  94     }
  95     else
  96     {
  97         *ppv = NULL;
  98         return E_NOINTERFACE;
  99     }
 100
 101     IUnknown_AddRef((IUnknown*)*ppv);
 102     return S_OK;
 103 }
 104
 105 static ULONG WINAPI MetadataHandler_AddRef(IWICMetadataWriter *iface)
 106 {
 107     MetadataHandler *This = impl_from_IWICMetadataWriter(iface);
 108     ULONG ref = InterlockedIncrement(&This->ref);
 109
 110     TRACE("(%p) refcount=%u\n", iface, ref);
 111
 112     return ref;
 113 }
 114
 115 static ULONG WINAPI MetadataHandler_Release(IWICMetadataWriter *iface)
 116 {
 117     MetadataHandler *This = impl_from_IWICMetadataWriter(iface);
 118     ULONG ref = InterlockedDecrement(&This->ref);
 119
 120     TRACE("(%p) refcount=%u\n", iface, ref);
 121
 122     if (ref == 0)
 123     {
 124         MetadataHandler_FreeItems(This);
 125         This->lock.DebugInfo->Spare[0] = 0;
 126         DeleteCriticalSection(&This->lock);
 127         HeapFree(GetProcessHeap(), 0, This);
 128     }
 129
 130     return ref;
 131 }
 132
 133 static HRESULT WINAPI MetadataHandler_GetMetadataHandlerInfo(IWICMetadataWriter *iface,
 134     IWICMetadataHandlerInfo **ppIHandler)
 135 {
 136     HRESULT hr;
 137     IWICComponentInfo *component_info;
 138     MetadataHandler *This = impl_from_IWICMetadataWriter(iface);
 139
 140     TRACE("%p,%p\n", iface, ppIHandler);
 141
 142     hr = CreateComponentInfo(This->vtable->clsid, &component_info);
 143     if (FAILED(hr)) return hr;
 144
 145     hr = IWICComponentInfo_QueryInterface(component_info, &IID_IWICMetadataHandlerInfo,
 146         (void **)ppIHandler);
 147
 148     IWICComponentInfo_Release(component_info);
 149     return hr;
 150 }
 151
 152 static HRESULT WINAPI MetadataHandler_GetMetadataFormat(IWICMetadataWriter *iface,
 153     GUID *pguidMetadataFormat)
 154 {
 155     HRESULT hr;
 156     IWICMetadataHandlerInfo *metadata_info;
 157
 158     TRACE("%p,%p\n", iface, pguidMetadataFormat);
 159
 160     if (!pguidMetadataFormat) return E_INVALIDARG;
 161
 162     hr = MetadataHandler_GetMetadataHandlerInfo(iface, &metadata_info);
 163     if (FAILED(hr)) return hr;
 164
 165     hr = IWICMetadataHandlerInfo_GetMetadataFormat(metadata_info, pguidMetadataFormat);
 166     IWICMetadataHandlerInfo_Release(metadata_info);
 167
 168     return hr;
 169 }
 170
 171 static HRESULT WINAPI MetadataHandler_GetCount(IWICMetadataWriter *iface,
 172     UINT *pcCount)
 173 {
 174     MetadataHandler *This = impl_from_IWICMetadataWriter(iface);
 175
 176     TRACE("%p,%p\n", iface, pcCount);
 177
 178     if (!pcCount) return E_INVALIDARG;
 179
 180     *pcCount = This->item_count;
 181     return S_OK;
 182 }
 183
 184 static HRESULT WINAPI MetadataHandler_GetValueByIndex(IWICMetadataWriter *iface,
 185     UINT index, PROPVARIANT *schema, PROPVARIANT *id, PROPVARIANT *value)
 186 {
 187     HRESULT hr = S_OK;
 188     MetadataHandler *This = impl_from_IWICMetadataWriter(iface);
 189
 190     TRACE("%p,%u,%p,%p,%p\n", iface, index, schema, id, value);
 191
 192     EnterCriticalSection(&This->lock);
 193
 194     if (index >= This->item_count)
 195     {
 196         LeaveCriticalSection(&This->lock);
 197         return E_INVALIDARG;
 198     }
 199
 200     if (schema)
 201         hr = PropVariantCopy(schema, &This->items[index].schema);
 202
 203     if (SUCCEEDED(hr) && id)
 204         hr = PropVariantCopy(id, &This->items[index].id);
 205
 206     if (SUCCEEDED(hr) && value)
 207         hr = PropVariantCopy(value, &This->items[index].value);
 208
 209     LeaveCriticalSection(&This->lock);
 210     return hr;
 211 }
 212
 213 static HRESULT WINAPI MetadataHandler_GetValue(IWICMetadataWriter *iface,
 214     const PROPVARIANT *schema, const PROPVARIANT *id, PROPVARIANT *value)
 215 {
 216     UINT i;
 217     HRESULT hr = WINCODEC_ERR_PROPERTYNOTFOUND;
 218     MetadataHandler *This = impl_from_IWICMetadataWriter(iface);
 219
 220     TRACE("(%p,%s,%s,%p)\n", iface, wine_dbgstr_variant((const VARIANT *)schema), wine_dbgstr_variant((const VARIANT *)id), value);
 221
 222     if (!id) return E_INVALIDARG;
 223
 224     EnterCriticalSection(&This->lock);
 225
 226     for (i = 0; i < This->item_count; i++)
 227     {
 228         if (schema && This->items[i].schema.vt != VT_EMPTY)
 229         {
 230             if (PropVariantCompareEx(schema, &This->items[i].schema, 0, PVCF_USESTRCMPI) != 0) continue;
 231         }
 232
 233         if (PropVariantCompareEx(id, &This->items[i].id, 0, PVCF_USESTRCMPI) != 0) continue;
 234
 235         hr = value ? PropVariantCopy(value, &This->items[i].value) : S_OK;
 236         break;
 237     }
 238
 239     LeaveCriticalSection(&This->lock);
 240     return hr;
 241 }
 242
 243 static HRESULT WINAPI MetadataHandler_GetEnumerator(IWICMetadataWriter *iface,
 244     IWICEnumMetadataItem **ppIEnumMetadata)
 245 {
 246     MetadataHandler *This = impl_from_IWICMetadataWriter(iface);
 247     TRACE("(%p,%p)\n", iface, ppIEnumMetadata);
 248     return MetadataHandlerEnum_Create(This, 0, ppIEnumMetadata);
 249 }
 250
 251 static HRESULT WINAPI MetadataHandler_SetValue(IWICMetadataWriter *iface,
 252     const PROPVARIANT *pvarSchema, const PROPVARIANT *pvarId, const PROPVARIANT *pvarValue)
 253 {
 254     FIXME("(%p,%p,%p,%p): stub\n", iface, pvarSchema, pvarId, pvarValue);
 255     return E_NOTIMPL;
 256 }
 257
 258 static HRESULT WINAPI MetadataHandler_SetValueByIndex(IWICMetadataWriter *iface,
 259     UINT nIndex, const PROPVARIANT *pvarSchema, const PROPVARIANT *pvarId, const PROPVARIANT *pvarValue)
 260 {
 261     FIXME("(%p,%u,%p,%p,%p): stub\n", iface, nIndex, pvarSchema, pvarId, pvarValue);
 262     return E_NOTIMPL;
 263 }
 264
 265 static HRESULT WINAPI MetadataHandler_RemoveValue(IWICMetadataWriter *iface,
 266     const PROPVARIANT *pvarSchema, const PROPVARIANT *pvarId)
 267 {
 268     FIXME("(%p,%p,%p): stub\n", iface, pvarSchema, pvarId);
 269     return E_NOTIMPL;
 270 }
 271
 272 static HRESULT WINAPI MetadataHandler_RemoveValueByIndex(IWICMetadataWriter *iface,
 273     UINT nIndex)
 274 {
 275     FIXME("(%p,%u): stub\n", iface, nIndex);
 276     return E_NOTIMPL;
 277 }
 278
 279 static const IWICMetadataWriterVtbl MetadataHandler_Vtbl = {
 280     MetadataHandler_QueryInterface,
 281     MetadataHandler_AddRef,
 282     MetadataHandler_Release,
 283     MetadataHandler_GetMetadataFormat,
 284     MetadataHandler_GetMetadataHandlerInfo,
 285     MetadataHandler_GetCount,
 286     MetadataHandler_GetValueByIndex,
 287     MetadataHandler_GetValue,
 288     MetadataHandler_GetEnumerator,
 289     MetadataHandler_SetValue,
 290     MetadataHandler_SetValueByIndex,
 291     MetadataHandler_RemoveValue,
 292     MetadataHandler_RemoveValueByIndex
 293 };
 294
 295 static HRESULT WINAPI MetadataHandler_PersistStream_QueryInterface(IWICPersistStream *iface,
 296     REFIID iid, void **ppv)
 297 {
 298     MetadataHandler *This = impl_from_IWICPersistStream(iface);
 299     return IWICMetadataWriter_QueryInterface(&This->IWICMetadataWriter_iface, iid, ppv);
 300 }
 301
 302 static ULONG WINAPI MetadataHandler_PersistStream_AddRef(IWICPersistStream *iface)
 303 {
 304     MetadataHandler *This = impl_from_IWICPersistStream(iface);
 305     return IWICMetadataWriter_AddRef(&This->IWICMetadataWriter_iface);
 306 }
 307
 308 static ULONG WINAPI MetadataHandler_PersistStream_Release(IWICPersistStream *iface)
 309 {
 310     MetadataHandler *This = impl_from_IWICPersistStream(iface);
 311     return IWICMetadataWriter_Release(&This->IWICMetadataWriter_iface);
 312 }
 313
 314 static HRESULT WINAPI MetadataHandler_GetClassID(IWICPersistStream *iface,
 315     CLSID *pClassID)
 316 {
 317     FIXME("(%p,%p): stub\n", iface, pClassID);
 318     return E_NOTIMPL;
 319 }
 320
 321 static HRESULT WINAPI MetadataHandler_IsDirty(IWICPersistStream *iface)
 322 {
 323     FIXME("(%p): stub\n", iface);
 324     return E_NOTIMPL;
 325 }
 326
 327 static HRESULT WINAPI MetadataHandler_Load(IWICPersistStream *iface,
 328     IStream *pStm)
 329 {
 330     MetadataHandler *This = impl_from_IWICPersistStream(iface);
 331     TRACE("(%p,%p)\n", iface, pStm);
 332     return IWICPersistStream_LoadEx(&This->IWICPersistStream_iface, pStm, NULL, WICPersistOptionDefault);
 333 }
 334
 335 static HRESULT WINAPI MetadataHandler_Save(IWICPersistStream *iface,
 336     IStream *pStm, BOOL fClearDirty)
 337 {
 338     FIXME("(%p,%p,%i): stub\n", iface, pStm, fClearDirty);
 339     return E_NOTIMPL;
 340 }
 341
 342 static HRESULT WINAPI MetadataHandler_GetSizeMax(IWICPersistStream *iface,
 343     ULARGE_INTEGER *pcbSize)
 344 {
 345     FIXME("(%p,%p): stub\n", iface, pcbSize);
 346     return E_NOTIMPL;
 347 }
 348
 349 static HRESULT WINAPI MetadataHandler_LoadEx(IWICPersistStream *iface,
 350     IStream *pIStream, const GUID *pguidPreferredVendor, DWORD dwPersistOptions)
 351 {
 352     MetadataHandler *This = impl_from_IWICPersistStream(iface);
 353     HRESULT hr;
 354     MetadataItem *new_items=NULL;
 355     DWORD item_count=0;
 356
 357     TRACE("(%p,%p,%s,%x)\n", iface, pIStream, debugstr_guid(pguidPreferredVendor), dwPersistOptions);
 358
 359     EnterCriticalSection(&This->lock);
 360
 361     hr = This->vtable->fnLoad(pIStream, pguidPreferredVendor, dwPersistOptions,
 362         &new_items, &item_count);
 363
 364     if (SUCCEEDED(hr))
 365     {
 366         MetadataHandler_FreeItems(This);
 367         This->items = new_items;
 368         This->item_count = item_count;
 369     }
 370
 371     LeaveCriticalSection(&This->lock);
 372
 373     return hr;
 374 }
 375
 376 static HRESULT WINAPI MetadataHandler_SaveEx(IWICPersistStream *iface,
 377     IStream *pIStream, DWORD dwPersistOptions, BOOL fClearDirty)
 378 {
 379     FIXME("(%p,%p,%x,%i): stub\n", iface, pIStream, dwPersistOptions, fClearDirty);
 380     return E_NOTIMPL;
 381 }
 382
 383 static const IWICPersistStreamVtbl MetadataHandler_PersistStream_Vtbl = {
 384     MetadataHandler_PersistStream_QueryInterface,
 385     MetadataHandler_PersistStream_AddRef,
 386     MetadataHandler_PersistStream_Release,
 387     MetadataHandler_GetClassID,
 388     MetadataHandler_IsDirty,
 389     MetadataHandler_Load,
 390     MetadataHandler_Save,
 391     MetadataHandler_GetSizeMax,
 392     MetadataHandler_LoadEx,
 393     MetadataHandler_SaveEx
 394 };
 395
 396 HRESULT MetadataReader_Create(const MetadataHandlerVtbl *vtable, REFIID iid, void** ppv)
 397 {
 398     MetadataHandler *This;
 399     HRESULT hr;
 400
 401     TRACE("%s\n", debugstr_guid(vtable->clsid));
 402
 403     *ppv = NULL;
 404
 405     This = HeapAlloc(GetProcessHeap(), 0, sizeof(MetadataHandler));
 406     if (!This) return E_OUTOFMEMORY;
 407
 408     This->IWICMetadataWriter_iface.lpVtbl = &MetadataHandler_Vtbl;
 409     This->IWICPersistStream_iface.lpVtbl = &MetadataHandler_PersistStream_Vtbl;
 410     This->ref = 1;
 411     This->vtable = vtable;
 412     This->items = NULL;
 413     This->item_count = 0;
 414
 415     InitializeCriticalSection(&This->lock);
 416     This->lock.DebugInfo->Spare[0] = (DWORD_PTR)(__FILE__ ": MetadataHandler.lock");
 417
 418     hr = IWICMetadataWriter_QueryInterface(&This->IWICMetadataWriter_iface, iid, ppv);
 419
 420     IWICMetadataWriter_Release(&This->IWICMetadataWriter_iface);
 421
 422     return hr;
 423 }
 424
 425 typedef struct MetadataHandlerEnum {
 426     IWICEnumMetadataItem IWICEnumMetadataItem_iface;
 427     LONG ref;
 428     MetadataHandler *parent;
 429     DWORD index;
 430 } MetadataHandlerEnum;
 431
 432 static inline MetadataHandlerEnum *impl_from_IWICEnumMetadataItem(IWICEnumMetadataItem *iface)
 433 {
 434     return CONTAINING_RECORD(iface, MetadataHandlerEnum, IWICEnumMetadataItem_iface);
 435 }
 436
 437 static HRESULT WINAPI MetadataHandlerEnum_QueryInterface(IWICEnumMetadataItem *iface, REFIID iid,
 438     void **ppv)
 439 {
 440     MetadataHandlerEnum *This = impl_from_IWICEnumMetadataItem(iface);
 441     TRACE("(%p,%s,%p)\n", iface, debugstr_guid(iid), ppv);
 442
 443     if (!ppv) return E_INVALIDARG;
 444
 445     if (IsEqualIID(&IID_IUnknown, iid) ||
 446         IsEqualIID(&IID_IWICEnumMetadataItem, iid))
 447     {
 448         *ppv = &This->IWICEnumMetadataItem_iface;
 449     }
 450     else
 451     {
 452         *ppv = NULL;
 453         return E_NOINTERFACE;
 454     }
 455
 456     IUnknown_AddRef((IUnknown*)*ppv);
 457     return S_OK;
 458 }
 459
 460 static ULONG WINAPI MetadataHandlerEnum_AddRef(IWICEnumMetadataItem *iface)
 461 {
 462     MetadataHandlerEnum *This = impl_from_IWICEnumMetadataItem(iface);
 463     ULONG ref = InterlockedIncrement(&This->ref);
 464
 465     TRACE("(%p) refcount=%u\n", iface, ref);
 466
 467     return ref;
 468 }
 469
 470 static ULONG WINAPI MetadataHandlerEnum_Release(IWICEnumMetadataItem *iface)
 471 {
 472     MetadataHandlerEnum *This = impl_from_IWICEnumMetadataItem(iface);
 473     ULONG ref = InterlockedDecrement(&This->ref);
 474
 475     TRACE("(%p) refcount=%u\n", iface, ref);
 476
 477     if (ref == 0)
 478     {
 479         IWICMetadataWriter_Release(&This->parent->IWICMetadataWriter_iface);
 480         HeapFree(GetProcessHeap(), 0, This);
 481     }
 482
 483     return ref;
 484 }
 485
 486 static HRESULT WINAPI MetadataHandlerEnum_Next(IWICEnumMetadataItem *iface,
 487     ULONG celt, PROPVARIANT *rgeltSchema, PROPVARIANT *rgeltId,
 488     PROPVARIANT *rgeltValue, ULONG *pceltFetched)
 489 {
 490     MetadataHandlerEnum *This = impl_from_IWICEnumMetadataItem(iface);
 491     ULONG new_index;
 492     HRESULT hr=S_FALSE;
 493     ULONG i;
 494
 495     TRACE("(%p,%i)\n", iface, celt);
 496
 497     EnterCriticalSection(&This->parent->lock);
 498
 499     if (This->index >= This->parent->item_count)
 500     {
 501         *pceltFetched = 0;
 502         LeaveCriticalSection(&This->parent->lock);
 503         return S_FALSE;
 504     }
 505
 506     new_index = min(This->parent->item_count, This->index + celt);
 507     *pceltFetched = new_index - This->index;
 508
 509     if (rgeltSchema)
 510     {
 511         for (i=0; SUCCEEDED(hr) && i < *pceltFetched; i++)
 512             hr = PropVariantCopy(&rgeltSchema[i], &This->parent->items[i+This->index].schema);
 513     }
 514
 515     for (i=0; SUCCEEDED(hr) && i < *pceltFetched; i++)
 516         hr = PropVariantCopy(&rgeltId[i], &This->parent->items[i+This->index].id);
 517
 518     if (rgeltValue)
 519     {
 520         for (i=0; SUCCEEDED(hr) && i < *pceltFetched; i++)
 521             hr = PropVariantCopy(&rgeltValue[i], &This->parent->items[i+This->index].value);
 522     }
 523
 524     if (SUCCEEDED(hr))
 525     {
 526         This->index = new_index;
 527     }
 528
 529     LeaveCriticalSection(&This->parent->lock);
 530
 531     return hr;
 532 }
 533
 534 static HRESULT WINAPI MetadataHandlerEnum_Skip(IWICEnumMetadataItem *iface,
 535     ULONG celt)
 536 {
 537     MetadataHandlerEnum *This = impl_from_IWICEnumMetadataItem(iface);
 538
 539     EnterCriticalSection(&This->parent->lock);
 540
 541     This->index += celt;
 542
 543     LeaveCriticalSection(&This->parent->lock);
 544
 545     return S_OK;
 546 }
 547
 548 static HRESULT WINAPI MetadataHandlerEnum_Reset(IWICEnumMetadataItem *iface)
 549 {
 550     MetadataHandlerEnum *This = impl_from_IWICEnumMetadataItem(iface);
 551
 552     EnterCriticalSection(&This->parent->lock);
 553
 554     This->index = 0;
 555
 556     LeaveCriticalSection(&This->parent->lock);
 557
 558     return S_OK;
 559 }
 560
 561 static HRESULT WINAPI MetadataHandlerEnum_Clone(IWICEnumMetadataItem *iface,
 562     IWICEnumMetadataItem **ppIEnumMetadataItem)
 563 {
 564     MetadataHandlerEnum *This = impl_from_IWICEnumMetadataItem(iface);
 565     HRESULT hr;
 566
 567     EnterCriticalSection(&This->parent->lock);
 568
 569     hr = MetadataHandlerEnum_Create(This->parent, This->index, ppIEnumMetadataItem);
 570
 571     LeaveCriticalSection(&This->parent->lock);
 572
 573     return hr;
 574 }
 575
 576 static const IWICEnumMetadataItemVtbl MetadataHandlerEnum_Vtbl = {
 577     MetadataHandlerEnum_QueryInterface,
 578     MetadataHandlerEnum_AddRef,
 579     MetadataHandlerEnum_Release,
 580     MetadataHandlerEnum_Next,
 581     MetadataHandlerEnum_Skip,
 582     MetadataHandlerEnum_Reset,
 583     MetadataHandlerEnum_Clone
 584 };
 585
 586 static HRESULT MetadataHandlerEnum_Create(MetadataHandler *parent, DWORD index,
 587     IWICEnumMetadataItem **ppIEnumMetadataItem)
 588 {
 589     MetadataHandlerEnum *This;
 590
 591     if (!ppIEnumMetadataItem) return E_INVALIDARG;
 592
 593     *ppIEnumMetadataItem = NULL;
 594
 595     This = HeapAlloc(GetProcessHeap(), 0, sizeof(MetadataHandlerEnum));
 596     if (!This) return E_OUTOFMEMORY;
 597
 598     IWICMetadataWriter_AddRef(&parent->IWICMetadataWriter_iface);
 599
 600     This->IWICEnumMetadataItem_iface.lpVtbl = &MetadataHandlerEnum_Vtbl;
 601     This->ref = 1;
 602     This->parent = parent;
 603     This->index = index;
 604
 605     *ppIEnumMetadataItem = &This->IWICEnumMetadataItem_iface;
 606
 607     return S_OK;
 608 }
 609
 610 static HRESULT LoadUnknownMetadata(IStream *input, const GUID *preferred_vendor,
 611     DWORD persist_options, MetadataItem **items, DWORD *item_count)
 612 {
 613     HRESULT hr;
 614     MetadataItem *result;
 615     STATSTG stat;
 616     BYTE *data;
 617     ULONG bytesread;
 618
 619     TRACE("\n");
 620
 621     hr = IStream_Stat(input, &stat, STATFLAG_NONAME);
 622     if (FAILED(hr))
 623         return hr;
 624
 625     data = HeapAlloc(GetProcessHeap(), 0, stat.cbSize.QuadPart);
 626     if (!data) return E_OUTOFMEMORY;
 627
 628     hr = IStream_Read(input, data, stat.cbSize.QuadPart, &bytesread);
 629     if (bytesread != stat.cbSize.QuadPart) hr = E_FAIL;
 630     if (hr != S_OK)
 631     {
 632         HeapFree(GetProcessHeap(), 0, data);
 633         return hr;
 634     }
 635
 636     result = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof(MetadataItem));
 637     if (!result)
 638     {
 639         HeapFree(GetProcessHeap(), 0, data);
 640         return E_OUTOFMEMORY;
 641     }
 642
 643     PropVariantInit(&result[0].schema);
 644     PropVariantInit(&result[0].id);
 645     PropVariantInit(&result[0].value);
 646
 647     result[0].value.vt = VT_BLOB;
 648     result[0].value.blob.cbSize = bytesread;
 649     result[0].value.blob.pBlobData = data;
 650
 651     *items = result;
 652     *item_count = 1;
 653
 654     return S_OK;
 655 }
 656
 657 static const MetadataHandlerVtbl UnknownMetadataReader_Vtbl = {
 658     0,
 659     &CLSID_WICUnknownMetadataReader,
 660     LoadUnknownMetadata
 661 };
 662
 663 HRESULT UnknownMetadataReader_CreateInstance(REFIID iid, void** ppv)
 664 {
 665     return MetadataReader_Create(&UnknownMetadataReader_Vtbl, iid, ppv);
 666 }
 667
 668 #define SWAP_USHORT(x) do { if (!native_byte_order) (x) = RtlUshortByteSwap(x); } while(0)
 669 #define SWAP_ULONG(x) do { if (!native_byte_order) (x) = RtlUlongByteSwap(x); } while(0)
 670 #define SWAP_ULONGLONG(x) do { if (!native_byte_order) (x) = RtlUlonglongByteSwap(x); } while(0)
 671
 672 struct IFD_entry
 673 {
 674     SHORT id;
 675     SHORT type;
 676     ULONG count;
 677     LONG  value;
 678 };
 679
 680 #define IFD_BYTE 1
 681 #define IFD_ASCII 2
 682 #define IFD_SHORT 3
 683 #define IFD_LONG 4
 684 #define IFD_RATIONAL 5
 685 #define IFD_SBYTE 6
 686 #define IFD_UNDEFINED 7
 687 #define IFD_SSHORT 8
 688 #define IFD_SLONG 9
 689 #define IFD_SRATIONAL 10
 690 #define IFD_FLOAT 11
 691 #define IFD_DOUBLE 12
 692 #define IFD_IFD 13
 693
 694 static int tag_to_vt(SHORT tag)
 695 {
 696     static const int tag2vt[] =
 697     {
 698         VT_EMPTY, /* 0 */
 699         VT_UI1,   /* IFD_BYTE 1 */
 700         VT_LPSTR, /* IFD_ASCII 2 */
 701         VT_UI2,   /* IFD_SHORT 3 */
 702         VT_UI4,   /* IFD_LONG 4 */
 703         VT_UI8,   /* IFD_RATIONAL 5 */
 704         VT_I1,    /* IFD_SBYTE 6 */
 705         VT_BLOB,  /* IFD_UNDEFINED 7 */
 706         VT_I2,    /* IFD_SSHORT 8 */
 707         VT_I4,    /* IFD_SLONG 9 */
 708         VT_I8,    /* IFD_SRATIONAL 10 */
 709         VT_R4,    /* IFD_FLOAT 11 */
 710         VT_R8,    /* IFD_DOUBLE 12 */
 711         VT_BLOB,  /* IFD_IFD 13 */
 712     };
 713     return (tag > 0 && tag <= 13) ? tag2vt[tag] : VT_BLOB;
 714 }
 715
 716 static HRESULT load_IFD_entry(IStream *input, const struct IFD_entry *entry,
 717                               MetadataItem *item, BOOL native_byte_order)
 718 {
 719     ULONG count, value, i, bytesread;
 720     SHORT type;
 721     LARGE_INTEGER pos;
 722     HRESULT hr;
 723
 724     item->schema.vt = VT_EMPTY;
 725     item->id.vt = VT_UI2;
 726     item->id.uiVal = entry->id;
 727     SWAP_USHORT(item->id.uiVal);
 728
 729     count = entry->count;
 730     SWAP_ULONG(count);
 731     type = entry->type;
 732     SWAP_USHORT(type);
 733     item->value.vt = tag_to_vt(type);
 734     value = entry->value;
 735     SWAP_ULONG(value);
 736
 737     switch (type)
 738     {
 739      case IFD_BYTE:
 740      case IFD_SBYTE:
 741         if (!count) count = 1;
 742
 743         if (count <= 4)
 744         {
 745             const BYTE *data = (const BYTE *)&entry->value;
 746
 747             if (count == 1)
 748                 item->value.bVal = data[0];
 749             else
 750             {
 751                 item->value.vt |= VT_VECTOR;
 752                 item->value.caub.cElems = count;
 753                 item->value.caub.pElems = HeapAlloc(GetProcessHeap(), 0, count);
 754                 memcpy(item->value.caub.pElems, data, count);
 755             }
 756             break;
 757         }
 758
 759         item->value.vt |= VT_VECTOR;
 760         item->value.caub.cElems = count;
 761         item->value.caub.pElems = HeapAlloc(GetProcessHeap(), 0, count);
 762         if (!item->value.caub.pElems) return E_OUTOFMEMORY;
 763
 764         pos.QuadPart = value;
 765         hr = IStream_Seek(input, pos, SEEK_SET, NULL);
 766         if (FAILED(hr))
 767         {
 768             HeapFree(GetProcessHeap(), 0, item->value.caub.pElems);
 769             return hr;
 770         }
 771         hr = IStream_Read(input, item->value.caub.pElems, count, &bytesread);
 772         if (bytesread != count) hr = E_FAIL;
 773         if (hr != S_OK)
 774         {
 775             HeapFree(GetProcessHeap(), 0, item->value.caub.pElems);
 776             return hr;
 777         }
 778         break;
 779     case IFD_SHORT:
 780     case IFD_SSHORT:
 781         if (!count) count = 1;
 782
 783         if (count <= 2)
 784         {
 785             const SHORT *data = (const SHORT *)&entry->value;
 786
 787             if (count == 1)
 788             {
 789                 item->value.uiVal = data[0];
 790                 SWAP_USHORT(item->value.uiVal);
 791             }
 792             else
 793             {
 794                 item->value.vt |= VT_VECTOR;
 795                 item->value.caui.cElems = count;
 796                 item->value.caui.pElems = HeapAlloc(GetProcessHeap(), 0, count * 2);
 797                 memcpy(item->value.caui.pElems, data, count * 2);
 798                 for (i = 0; i < count; i++)
 799                     SWAP_USHORT(item->value.caui.pElems[i]);
 800             }
 801             break;
 802         }
 803
 804         item->value.vt |= VT_VECTOR;
 805         item->value.caui.cElems = count;
 806         item->value.caui.pElems = HeapAlloc(GetProcessHeap(), 0, count * 2);
 807         if (!item->value.caui.pElems) return E_OUTOFMEMORY;
 808
 809         pos.QuadPart = value;
 810         hr = IStream_Seek(input, pos, SEEK_SET, NULL);
 811         if (FAILED(hr))
 812         {
 813             HeapFree(GetProcessHeap(), 0, item->value.caui.pElems);
 814             return hr;
 815         }
 816         hr = IStream_Read(input, item->value.caui.pElems, count * 2, &bytesread);
 817         if (bytesread != count * 2) hr = E_FAIL;
 818         if (hr != S_OK)
 819         {
 820             HeapFree(GetProcessHeap(), 0, item->value.caui.pElems);
 821             return hr;
 822         }
 823         for (i = 0; i < count; i++)
 824             SWAP_USHORT(item->value.caui.pElems[i]);
 825         break;
 826     case IFD_LONG:
 827     case IFD_SLONG:
 828     case IFD_FLOAT:
 829         if (!count) count = 1;
 830
 831         if (count == 1)
 832         {
 833             item->value.ulVal = value;
 834             break;
 835         }
 836
 837         item->value.vt |= VT_VECTOR;
 838         item->value.caul.cElems = count;
 839         item->value.caul.pElems = HeapAlloc(GetProcessHeap(), 0, count * 4);
 840         if (!item->value.caul.pElems) return E_OUTOFMEMORY;
 841
 842         pos.QuadPart = value;
 843         hr = IStream_Seek(input, pos, SEEK_SET, NULL);
 844         if (FAILED(hr))
 845         {
 846             HeapFree(GetProcessHeap(), 0, item->value.caul.pElems);
 847             return hr;
 848         }
 849         hr = IStream_Read(input, item->value.caul.pElems, count * 4, &bytesread);
 850         if (bytesread != count * 4) hr = E_FAIL;
 851         if (hr != S_OK)
 852         {
 853             HeapFree(GetProcessHeap(), 0, item->value.caul.pElems);
 854             return hr;
 855         }
 856         for (i = 0; i < count; i++)
 857             SWAP_ULONG(item->value.caul.pElems[i]);
 858         break;
 859     case IFD_RATIONAL:
 860     case IFD_SRATIONAL:
 861     case IFD_DOUBLE:
 862         if (!count)
 863         {
 864             FIXME("IFD field type %d, count 0\n", type);
 865             item->value.vt = VT_EMPTY;
 866             break;
 867         }
 868
 869         if (count == 1)
 870         {
 871             ULONGLONG ull;
 872
 873             pos.QuadPart = value;
 874             hr = IStream_Seek(input, pos, SEEK_SET, NULL);
 875             if (FAILED(hr)) return hr;
 876
 877             hr = IStream_Read(input, &ull, sizeof(ull), &bytesread);
 878             if (bytesread != sizeof(ull)) hr = E_FAIL;
 879             if (hr != S_OK) return hr;
 880
 881             item->value.uhVal.QuadPart = ull;
 882
 883             if (type == IFD_DOUBLE)
 884                 SWAP_ULONGLONG(item->value.uhVal.QuadPart);
 885             else
 886             {
 887                 SWAP_ULONG(item->value.uhVal.LowPart);
 888                 SWAP_ULONG(item->value.uhVal.HighPart);
 889             }
 890             break;
 891         }
 892         else
 893         {
 894             item->value.vt |= VT_VECTOR;
 895             item->value.cauh.cElems = count;
 896             item->value.cauh.pElems = HeapAlloc(GetProcessHeap(), 0, count * 8);
 897             if (!item->value.cauh.pElems) return E_OUTOFMEMORY;
 898
 899             pos.QuadPart = value;
 900             hr = IStream_Seek(input, pos, SEEK_SET, NULL);
 901             if (FAILED(hr))
 902             {
 903                 HeapFree(GetProcessHeap(), 0, item->value.cauh.pElems);
 904                 return hr;
 905             }
 906             hr = IStream_Read(input, item->value.cauh.pElems, count * 8, &bytesread);
 907             if (bytesread != count * 8) hr = E_FAIL;
 908             if (hr != S_OK)
 909             {
 910                 HeapFree(GetProcessHeap(), 0, item->value.cauh.pElems);
 911                 return hr;
 912             }
 913             for (i = 0; i < count; i++)
 914             {
 915                 if (type == IFD_DOUBLE)
 916                     SWAP_ULONGLONG(item->value.cauh.pElems[i].QuadPart);
 917                 else
 918                 {
 919                     SWAP_ULONG(item->value.cauh.pElems[i].LowPart);
 920                     SWAP_ULONG(item->value.cauh.pElems[i].HighPart);
 921                 }
 922             }
 923         }
 924         break;
 925     case IFD_ASCII:
 926         item->value.pszVal = HeapAlloc(GetProcessHeap(), 0, count + 1);
 927         if (!item->value.pszVal) return E_OUTOFMEMORY;
 928
 929         if (count <= 4)
 930         {
 931             const char *data = (const char *)&entry->value;
 932             memcpy(item->value.pszVal, data, count);
 933             item->value.pszVal[count] = 0;
 934             break;
 935         }
 936
 937         pos.QuadPart = value;
 938         hr = IStream_Seek(input, pos, SEEK_SET, NULL);
 939         if (FAILED(hr))
 940         {
 941             HeapFree(GetProcessHeap(), 0, item->value.pszVal);
 942             return hr;
 943         }
 944         hr = IStream_Read(input, item->value.pszVal, count, &bytesread);
 945         if (bytesread != count) hr = E_FAIL;
 946         if (hr != S_OK)
 947         {
 948             HeapFree(GetProcessHeap(), 0, item->value.pszVal);
 949             return hr;
 950         }
 951         item->value.pszVal[count] = 0;
 952         break;
 953     case IFD_UNDEFINED:
 954         if (!count)
 955         {
 956             FIXME("IFD field type %d, count 0\n", type);
 957             item->value.vt = VT_EMPTY;
 958             break;
 959         }
 960
 961         item->value.blob.pBlobData = HeapAlloc(GetProcessHeap(), 0, count);
 962         if (!item->value.blob.pBlobData) return E_OUTOFMEMORY;
 963
 964         item->value.blob.cbSize = count;
 965
 966         if (count <= 4)
 967         {
 968             const char *data = (const char *)&entry->value;
 969             memcpy(item->value.blob.pBlobData, data, count);
 970             break;
 971         }
 972
 973         pos.QuadPart = value;
 974         hr = IStream_Seek(input, pos, SEEK_SET, NULL);
 975         if (FAILED(hr))
 976         {
 977             HeapFree(GetProcessHeap(), 0, item->value.blob.pBlobData);
 978             return hr;
 979         }
 980         hr = IStream_Read(input, item->value.blob.pBlobData, count, &bytesread);
 981         if (bytesread != count) hr = E_FAIL;
 982         if (hr != S_OK)
 983         {
 984             HeapFree(GetProcessHeap(), 0, item->value.blob.pBlobData);
 985             return hr;
 986         }
 987         break;
 988     default:
 989         FIXME("loading field of type %d, count %u is not implemented\n", type, count);
 990         break;
 991     }
 992     return S_OK;
 993 }
 994
 995 static HRESULT LoadIfdMetadata(IStream *input, const GUID *preferred_vendor,
 996     DWORD persist_options, MetadataItem **items, DWORD *item_count)
 997 {
 998     HRESULT hr;
 999     MetadataItem *result;
1000     USHORT count, i;
1001     struct IFD_entry *entry;
1002     BOOL native_byte_order = TRUE;
1003     ULONG bytesread;
1004
1005     TRACE("\n");
1006
1007 #ifdef WORDS_BIGENDIAN
1008     if (persist_options & WICPersistOptionLittleEndian)
1009 #else
1010     if (persist_options & WICPersistOptionBigEndian)
1011 #endif
1012         native_byte_order = FALSE;
1013
1014     hr = IStream_Read(input, &count, sizeof(count), &bytesread);
1015     if (bytesread != sizeof(count)) hr = E_FAIL;
1016     if (hr != S_OK) return hr;
1017
1018     SWAP_USHORT(count);
1019
1020     entry = HeapAlloc(GetProcessHeap(), 0, count * sizeof(*entry));
1021     if (!entry) return E_OUTOFMEMORY;
1022
1023     hr = IStream_Read(input, entry, count * sizeof(*entry), &bytesread);
1024     if (bytesread != count * sizeof(*entry)) hr = E_FAIL;
1025     if (hr != S_OK)
1026     {
1027         HeapFree(GetProcessHeap(), 0, entry);
1028         return hr;
1029     }
1030
1031     /* limit number of IFDs to 4096 to avoid infinite loop */
1032     for (i = 0; i < 4096; i++)
1033     {
1034         ULONG next_ifd_offset;
1035         LARGE_INTEGER pos;
1036         USHORT next_ifd_count;
1037
1038         hr = IStream_Read(input, &next_ifd_offset, sizeof(next_ifd_offset), &bytesread);
1039         if (bytesread != sizeof(next_ifd_offset)) hr = E_FAIL;
1040         if (hr != S_OK) break;
1041
1042         SWAP_ULONG(next_ifd_offset);
1043         if (!next_ifd_offset) break;
1044
1045         pos.QuadPart = next_ifd_offset;
1046         hr = IStream_Seek(input, pos, SEEK_SET, NULL);
1047         if (FAILED(hr)) break;
1048
1049         hr = IStream_Read(input, &next_ifd_count, sizeof(next_ifd_count), &bytesread);
1050         if (bytesread != sizeof(next_ifd_count)) hr = E_FAIL;
1051         if (hr != S_OK) break;
1052
1053         SWAP_USHORT(next_ifd_count);
1054
1055         pos.QuadPart = next_ifd_count * sizeof(*entry);
1056         hr = IStream_Seek(input, pos, SEEK_CUR, NULL);
1057         if (FAILED(hr)) break;
1058     }
1059
1060     if (hr != S_OK || i == 4096)
1061     {
1062         HeapFree(GetProcessHeap(), 0, entry);
1063         return WINCODEC_ERR_BADMETADATAHEADER;
1064     }
1065
1066     result = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, count * sizeof(*result));
1067     if (!result)
1068     {
1069         HeapFree(GetProcessHeap(), 0, entry);
1070         return E_OUTOFMEMORY;
1071     }
1072
1073     for (i = 0; i < count; i++)
1074     {
1075         hr = load_IFD_entry(input, &entry[i], &result[i], native_byte_order);
1076         if (FAILED(hr))
1077         {
1078             HeapFree(GetProcessHeap(), 0, entry);
1079             HeapFree(GetProcessHeap(), 0, result);
1080             return hr;
1081         }
1082     }
1083
1084     HeapFree(GetProcessHeap(), 0, entry);
1085
1086     *items = result;
1087     *item_count = count;
1088
1089     return S_OK;
1090 }
1091
1092 static const MetadataHandlerVtbl IfdMetadataReader_Vtbl = {
1093     0,
1094     &CLSID_WICIfdMetadataReader,
1095     LoadIfdMetadata
1096 };
1097
1098 HRESULT IfdMetadataReader_CreateInstance(REFIID iid, void **ppv)
1099 {
1100     return MetadataReader_Create(&IfdMetadataReader_Vtbl, iid, ppv);
1101 }