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 "config.h"
  21
  22 #include <stdarg.h>
  23 #include <stdio.h>
  24
  25 #define COBJMACROS
  26 #define NONAMELESSUNION
  27
  28 #include "windef.h"
  29 #include "winbase.h"
  30 #include "winternl.h"
  31 #include "objbase.h"
  32 #include "wincodec.h"
  33 #include "wincodecsdk.h"
  34
  35 #include "wincodecs_private.h"
  36
  37 #include "wine/debug.h"
  38
  39 WINE_DEFAULT_DEBUG_CHANNEL(wincodecs);
  40
  41 typedef struct MetadataHandler {
  42     IWICMetadataWriter IWICMetadataWriter_iface;
  43     LONG ref;
  44     IWICPersistStream IWICPersistStream_iface;
  45     const MetadataHandlerVtbl *vtable;
  46     MetadataItem *items;
  47     DWORD item_count;
  48     CRITICAL_SECTION lock;
  49 } MetadataHandler;
  50
  51 static inline MetadataHandler *impl_from_IWICMetadataWriter(IWICMetadataWriter *iface)
  52 {
  53     return CONTAINING_RECORD(iface, MetadataHandler, IWICMetadataWriter_iface);
  54 }
  55
  56 static inline MetadataHandler *impl_from_IWICPersistStream(IWICPersistStream *iface)
  57 {
  58     return CONTAINING_RECORD(iface, MetadataHandler, IWICPersistStream_iface);
  59 }
  60
  61 static void MetadataHandler_FreeItems(MetadataHandler *This)
  62 {
  63     int i;
  64
  65     for (i=0; i<This->item_count; i++)
  66     {
  67         PropVariantClear(&This->items[i].schema);
  68         PropVariantClear(&This->items[i].id);
  69         PropVariantClear(&This->items[i].value);
  70     }
  71
  72     HeapFree(GetProcessHeap(), 0, This->items);
  73 }
  74
  75 static HRESULT MetadataHandlerEnum_Create(MetadataHandler *parent, DWORD index,
  76     IWICEnumMetadataItem **ppIEnumMetadataItem);
  77
  78 static HRESULT WINAPI MetadataHandler_QueryInterface(IWICMetadataWriter *iface, REFIID iid,
  79     void **ppv)
  80 {
  81     MetadataHandler *This = impl_from_IWICMetadataWriter(iface);
  82     TRACE("(%p,%s,%p)\n", iface, debugstr_guid(iid), ppv);
  83
  84     if (!ppv) return E_INVALIDARG;
  85
  86     if (IsEqualIID(&IID_IUnknown, iid) ||
  87         IsEqualIID(&IID_IWICMetadataReader, iid) ||
  88         (IsEqualIID(&IID_IWICMetadataWriter, iid) && This->vtable->is_writer))
  89     {
  90         *ppv = &This->IWICMetadataWriter_iface;
  91     }
  92     else if (IsEqualIID(&IID_IPersist, iid) ||
  93              IsEqualIID(&IID_IPersistStream, iid) ||
  94              IsEqualIID(&IID_IWICPersistStream, iid))
  95     {
  96         *ppv = &This->IWICPersistStream_iface;
  97     }
  98     else
  99     {
 100         *ppv = NULL;
 101         return E_NOINTERFACE;
 102     }
 103
 104     IUnknown_AddRef((IUnknown*)*ppv);
 105     return S_OK;
 106 }
 107
 108 static ULONG WINAPI MetadataHandler_AddRef(IWICMetadataWriter *iface)
 109 {
 110     MetadataHandler *This = impl_from_IWICMetadataWriter(iface);
 111     ULONG ref = InterlockedIncrement(&This->ref);
 112
 113     TRACE("(%p) refcount=%u\n", iface, ref);
 114
 115     return ref;
 116 }
 117
 118 static ULONG WINAPI MetadataHandler_Release(IWICMetadataWriter *iface)
 119 {
 120     MetadataHandler *This = impl_from_IWICMetadataWriter(iface);
 121     ULONG ref = InterlockedDecrement(&This->ref);
 122
 123     TRACE("(%p) refcount=%u\n", iface, ref);
 124
 125     if (ref == 0)
 126     {
 127         MetadataHandler_FreeItems(This);
 128         This->lock.DebugInfo->Spare[0] = 0;
 129         DeleteCriticalSection(&This->lock);
 130         HeapFree(GetProcessHeap(), 0, This);
 131     }
 132
 133     return ref;
 134 }
 135
 136 static HRESULT WINAPI MetadataHandler_GetMetadataHandlerInfo(IWICMetadataWriter *iface,
 137     IWICMetadataHandlerInfo **ppIHandler)
 138 {
 139     HRESULT hr;
 140     IWICComponentInfo *component_info;
 141     MetadataHandler *This = impl_from_IWICMetadataWriter(iface);
 142
 143     TRACE("%p,%p\n", iface, ppIHandler);
 144
 145     hr = CreateComponentInfo(This->vtable->clsid, &component_info);
 146     if (FAILED(hr)) return hr;
 147
 148     hr = IWICComponentInfo_QueryInterface(component_info, &IID_IWICMetadataHandlerInfo,
 149         (void **)ppIHandler);
 150
 151     IWICComponentInfo_Release(component_info);
 152     return hr;
 153 }
 154
 155 static HRESULT WINAPI MetadataHandler_GetMetadataFormat(IWICMetadataWriter *iface,
 156     GUID *pguidMetadataFormat)
 157 {
 158     HRESULT hr;
 159     IWICMetadataHandlerInfo *metadata_info;
 160
 161     TRACE("%p,%p\n", iface, pguidMetadataFormat);
 162
 163     if (!pguidMetadataFormat) return E_INVALIDARG;
 164
 165     hr = MetadataHandler_GetMetadataHandlerInfo(iface, &metadata_info);
 166     if (FAILED(hr)) return hr;
 167
 168     hr = IWICMetadataHandlerInfo_GetMetadataFormat(metadata_info, pguidMetadataFormat);
 169     IWICMetadataHandlerInfo_Release(metadata_info);
 170
 171     return hr;
 172 }
 173
 174 static HRESULT WINAPI MetadataHandler_GetCount(IWICMetadataWriter *iface,
 175     UINT *pcCount)
 176 {
 177     MetadataHandler *This = impl_from_IWICMetadataWriter(iface);
 178
 179     TRACE("%p,%p\n", iface, pcCount);
 180
 181     if (!pcCount) return E_INVALIDARG;
 182
 183     *pcCount = This->item_count;
 184     return S_OK;
 185 }
 186
 187 static HRESULT WINAPI MetadataHandler_GetValueByIndex(IWICMetadataWriter *iface,
 188     UINT index, PROPVARIANT *schema, PROPVARIANT *id, PROPVARIANT *value)
 189 {
 190     HRESULT hr = S_OK;
 191     MetadataHandler *This = impl_from_IWICMetadataWriter(iface);
 192
 193     TRACE("%p,%u,%p,%p,%p\n", iface, index, schema, id, value);
 194
 195     EnterCriticalSection(&This->lock);
 196
 197     if (index >= This->item_count)
 198     {
 199         LeaveCriticalSection(&This->lock);
 200         return E_INVALIDARG;
 201     }
 202
 203     if (schema)
 204         hr = PropVariantCopy(schema, &This->items[index].schema);
 205
 206     if (SUCCEEDED(hr) && id)
 207         hr = PropVariantCopy(id, &This->items[index].id);
 208
 209     if (SUCCEEDED(hr) && value)
 210         hr = PropVariantCopy(value, &This->items[index].value);
 211
 212     LeaveCriticalSection(&This->lock);
 213     return hr;
 214 }
 215
 216 static BOOL get_int_value(const PROPVARIANT *pv, LONGLONG *value)
 217 {
 218     switch (pv->vt)
 219     {
 220     case VT_NULL:
 221     case VT_EMPTY:
 222         *value = 0;
 223         break;
 224     case VT_I1:
 225         *value = pv->u.cVal;
 226         break;
 227     case VT_UI1:
 228         *value = pv->u.bVal;
 229         break;
 230     case VT_I2:
 231         *value = pv->u.iVal;
 232         break;
 233     case VT_UI2:
 234         *value = pv->u.uiVal;
 235         break;
 236     case VT_I4:
 237         *value = pv->u.lVal;
 238         break;
 239     case VT_UI4:
 240         *value = pv->u.ulVal;
 241         break;
 242     case VT_I8:
 243     case VT_UI8:
 244         *value = pv->u.hVal.QuadPart;
 245         break;
 246     default:
 247         FIXME("not supported variant type %d\n", pv->vt);
 248         return FALSE;
 249     }
 250     return TRUE;
 251 }
 252
 253 /* FiXME: Use propsys.PropVariantCompareEx once it's implemented */
 254 static int propvar_cmp(const PROPVARIANT *v1, const PROPVARIANT *v2)
 255 {
 256     LONGLONG value1, value2;
 257
 258     if (!get_int_value(v1, &value1)) return -1;
 259     if (!get_int_value(v2, &value2)) return -1;
 260
 261     value1 -= value2;
 262     if (value1) return value1 < 0 ? -1 : 1;
 263     return 0;
 264 }
 265
 266 static HRESULT WINAPI MetadataHandler_GetValue(IWICMetadataWriter *iface,
 267     const PROPVARIANT *schema, const PROPVARIANT *id, PROPVARIANT *value)
 268 {
 269     UINT i;
 270     HRESULT hr = WINCODEC_ERR_PROPERTYNOTFOUND;
 271     MetadataHandler *This = impl_from_IWICMetadataWriter(iface);
 272
 273     TRACE("(%p,%p,%p,%p)\n", iface, schema, id, value);
 274
 275     if (!id) return E_INVALIDARG;
 276
 277     EnterCriticalSection(&This->lock);
 278
 279     for (i = 0; i < This->item_count; i++)
 280     {
 281         if (schema && This->items[i].schema.vt != VT_EMPTY)
 282         {
 283             if (propvar_cmp(schema, &This->items[i].schema) != 0) continue;
 284         }
 285
 286         if (propvar_cmp(id, &This->items[i].id) != 0) continue;
 287
 288         hr = value ? PropVariantCopy(value, &This->items[i].value) : S_OK;
 289         break;
 290     }
 291
 292     LeaveCriticalSection(&This->lock);
 293     return hr;
 294 }
 295
 296 static HRESULT WINAPI MetadataHandler_GetEnumerator(IWICMetadataWriter *iface,
 297     IWICEnumMetadataItem **ppIEnumMetadata)
 298 {
 299     MetadataHandler *This = impl_from_IWICMetadataWriter(iface);
 300     TRACE("(%p,%p)\n", iface, ppIEnumMetadata);
 301     return MetadataHandlerEnum_Create(This, 0, ppIEnumMetadata);
 302 }
 303
 304 static HRESULT WINAPI MetadataHandler_SetValue(IWICMetadataWriter *iface,
 305     const PROPVARIANT *pvarSchema, const PROPVARIANT *pvarId, const PROPVARIANT *pvarValue)
 306 {
 307     FIXME("(%p,%p,%p,%p): stub\n", iface, pvarSchema, pvarId, pvarValue);
 308     return E_NOTIMPL;
 309 }
 310
 311 static HRESULT WINAPI MetadataHandler_SetValueByIndex(IWICMetadataWriter *iface,
 312     UINT nIndex, const PROPVARIANT *pvarSchema, const PROPVARIANT *pvarId, const PROPVARIANT *pvarValue)
 313 {
 314     FIXME("(%p,%u,%p,%p,%p): stub\n", iface, nIndex, pvarSchema, pvarId, pvarValue);
 315     return E_NOTIMPL;
 316 }
 317
 318 static HRESULT WINAPI MetadataHandler_RemoveValue(IWICMetadataWriter *iface,
 319     const PROPVARIANT *pvarSchema, const PROPVARIANT *pvarId)
 320 {
 321     FIXME("(%p,%p,%p): stub\n", iface, pvarSchema, pvarId);
 322     return E_NOTIMPL;
 323 }
 324
 325 static HRESULT WINAPI MetadataHandler_RemoveValueByIndex(IWICMetadataWriter *iface,
 326     UINT nIndex)
 327 {
 328     FIXME("(%p,%u): stub\n", iface, nIndex);
 329     return E_NOTIMPL;
 330 }
 331
 332 static const IWICMetadataWriterVtbl MetadataHandler_Vtbl = {
 333     MetadataHandler_QueryInterface,
 334     MetadataHandler_AddRef,
 335     MetadataHandler_Release,
 336     MetadataHandler_GetMetadataFormat,
 337     MetadataHandler_GetMetadataHandlerInfo,
 338     MetadataHandler_GetCount,
 339     MetadataHandler_GetValueByIndex,
 340     MetadataHandler_GetValue,
 341     MetadataHandler_GetEnumerator,
 342     MetadataHandler_SetValue,
 343     MetadataHandler_SetValueByIndex,
 344     MetadataHandler_RemoveValue,
 345     MetadataHandler_RemoveValueByIndex
 346 };
 347
 348 static HRESULT WINAPI MetadataHandler_PersistStream_QueryInterface(IWICPersistStream *iface,
 349     REFIID iid, void **ppv)
 350 {
 351     MetadataHandler *This = impl_from_IWICPersistStream(iface);
 352     return IWICMetadataWriter_QueryInterface(&This->IWICMetadataWriter_iface, iid, ppv);
 353 }
 354
 355 static ULONG WINAPI MetadataHandler_PersistStream_AddRef(IWICPersistStream *iface)
 356 {
 357     MetadataHandler *This = impl_from_IWICPersistStream(iface);
 358     return IWICMetadataWriter_AddRef(&This->IWICMetadataWriter_iface);
 359 }
 360
 361 static ULONG WINAPI MetadataHandler_PersistStream_Release(IWICPersistStream *iface)
 362 {
 363     MetadataHandler *This = impl_from_IWICPersistStream(iface);
 364     return IWICMetadataWriter_Release(&This->IWICMetadataWriter_iface);
 365 }
 366
 367 static HRESULT WINAPI MetadataHandler_GetClassID(IWICPersistStream *iface,
 368     CLSID *pClassID)
 369 {
 370     FIXME("(%p,%p): stub\n", iface, pClassID);
 371     return E_NOTIMPL;
 372 }
 373
 374 static HRESULT WINAPI MetadataHandler_IsDirty(IWICPersistStream *iface)
 375 {
 376     FIXME("(%p): stub\n", iface);
 377     return E_NOTIMPL;
 378 }
 379
 380 static HRESULT WINAPI MetadataHandler_Load(IWICPersistStream *iface,
 381     IStream *pStm)
 382 {
 383     FIXME("(%p,%p): stub\n", iface, pStm);
 384     return E_NOTIMPL;
 385 }
 386
 387 static HRESULT WINAPI MetadataHandler_Save(IWICPersistStream *iface,
 388     IStream *pStm, BOOL fClearDirty)
 389 {
 390     FIXME("(%p,%p,%i): stub\n", iface, pStm, fClearDirty);
 391     return E_NOTIMPL;
 392 }
 393
 394 static HRESULT WINAPI MetadataHandler_GetSizeMax(IWICPersistStream *iface,
 395     ULARGE_INTEGER *pcbSize)
 396 {
 397     FIXME("(%p,%p): stub\n", iface, pcbSize);
 398     return E_NOTIMPL;
 399 }
 400
 401 static HRESULT WINAPI MetadataHandler_LoadEx(IWICPersistStream *iface,
 402     IStream *pIStream, const GUID *pguidPreferredVendor, DWORD dwPersistOptions)
 403 {
 404     MetadataHandler *This = impl_from_IWICPersistStream(iface);
 405     HRESULT hr;
 406     MetadataItem *new_items=NULL;
 407     DWORD item_count=0;
 408
 409     TRACE("(%p,%p,%s,%x)\n", iface, pIStream, debugstr_guid(pguidPreferredVendor), dwPersistOptions);
 410
 411     EnterCriticalSection(&This->lock);
 412
 413     hr = This->vtable->fnLoad(pIStream, pguidPreferredVendor, dwPersistOptions,
 414         &new_items, &item_count);
 415
 416     if (SUCCEEDED(hr))
 417     {
 418         MetadataHandler_FreeItems(This);
 419         This->items = new_items;
 420         This->item_count = item_count;
 421     }
 422
 423     LeaveCriticalSection(&This->lock);
 424
 425     return hr;
 426 }
 427
 428 static HRESULT WINAPI MetadataHandler_SaveEx(IWICPersistStream *iface,
 429     IStream *pIStream, DWORD dwPersistOptions, BOOL fClearDirty)
 430 {
 431     FIXME("(%p,%p,%x,%i): stub\n", iface, pIStream, dwPersistOptions, fClearDirty);
 432     return E_NOTIMPL;
 433 }
 434
 435 static const IWICPersistStreamVtbl MetadataHandler_PersistStream_Vtbl = {
 436     MetadataHandler_PersistStream_QueryInterface,
 437     MetadataHandler_PersistStream_AddRef,
 438     MetadataHandler_PersistStream_Release,
 439     MetadataHandler_GetClassID,
 440     MetadataHandler_IsDirty,
 441     MetadataHandler_Load,
 442     MetadataHandler_Save,
 443     MetadataHandler_GetSizeMax,
 444     MetadataHandler_LoadEx,
 445     MetadataHandler_SaveEx
 446 };
 447
 448 static HRESULT MetadataReader_Create(const MetadataHandlerVtbl *vtable, IUnknown *pUnkOuter, REFIID iid, void** ppv)
 449 {
 450     MetadataHandler *This;
 451     HRESULT hr;
 452
 453     TRACE("%s\n", debugstr_guid(vtable->clsid));
 454
 455     *ppv = NULL;
 456
 457     if (pUnkOuter) return CLASS_E_NOAGGREGATION;
 458
 459     This = HeapAlloc(GetProcessHeap(), 0, sizeof(MetadataHandler));
 460     if (!This) return E_OUTOFMEMORY;
 461
 462     This->IWICMetadataWriter_iface.lpVtbl = &MetadataHandler_Vtbl;
 463     This->IWICPersistStream_iface.lpVtbl = &MetadataHandler_PersistStream_Vtbl;
 464     This->ref = 1;
 465     This->vtable = vtable;
 466     This->items = NULL;
 467     This->item_count = 0;
 468
 469     InitializeCriticalSection(&This->lock);
 470     This->lock.DebugInfo->Spare[0] = (DWORD_PTR)(__FILE__ ": MetadataHandler.lock");
 471
 472     hr = IWICMetadataWriter_QueryInterface(&This->IWICMetadataWriter_iface, iid, ppv);
 473
 474     IWICMetadataWriter_Release(&This->IWICMetadataWriter_iface);
 475
 476     return hr;
 477 }
 478
 479 typedef struct MetadataHandlerEnum {
 480     IWICEnumMetadataItem IWICEnumMetadataItem_iface;
 481     LONG ref;
 482     MetadataHandler *parent;
 483     DWORD index;
 484 } MetadataHandlerEnum;
 485
 486 static inline MetadataHandlerEnum *impl_from_IWICEnumMetadataItem(IWICEnumMetadataItem *iface)
 487 {
 488     return CONTAINING_RECORD(iface, MetadataHandlerEnum, IWICEnumMetadataItem_iface);
 489 }
 490
 491 static HRESULT WINAPI MetadataHandlerEnum_QueryInterface(IWICEnumMetadataItem *iface, REFIID iid,
 492     void **ppv)
 493 {
 494     MetadataHandlerEnum *This = impl_from_IWICEnumMetadataItem(iface);
 495     TRACE("(%p,%s,%p)\n", iface, debugstr_guid(iid), ppv);
 496
 497     if (!ppv) return E_INVALIDARG;
 498
 499     if (IsEqualIID(&IID_IUnknown, iid) ||
 500         IsEqualIID(&IID_IWICEnumMetadataItem, iid))
 501     {
 502         *ppv = &This->IWICEnumMetadataItem_iface;
 503     }
 504     else
 505     {
 506         *ppv = NULL;
 507         return E_NOINTERFACE;
 508     }
 509
 510     IUnknown_AddRef((IUnknown*)*ppv);
 511     return S_OK;
 512 }
 513
 514 static ULONG WINAPI MetadataHandlerEnum_AddRef(IWICEnumMetadataItem *iface)
 515 {
 516     MetadataHandlerEnum *This = impl_from_IWICEnumMetadataItem(iface);
 517     ULONG ref = InterlockedIncrement(&This->ref);
 518
 519     TRACE("(%p) refcount=%u\n", iface, ref);
 520
 521     return ref;
 522 }
 523
 524 static ULONG WINAPI MetadataHandlerEnum_Release(IWICEnumMetadataItem *iface)
 525 {
 526     MetadataHandlerEnum *This = impl_from_IWICEnumMetadataItem(iface);
 527     ULONG ref = InterlockedDecrement(&This->ref);
 528
 529     TRACE("(%p) refcount=%u\n", iface, ref);
 530
 531     if (ref == 0)
 532     {
 533         IWICMetadataWriter_Release(&This->parent->IWICMetadataWriter_iface);
 534         HeapFree(GetProcessHeap(), 0, This);
 535     }
 536
 537     return ref;
 538 }
 539
 540 static HRESULT WINAPI MetadataHandlerEnum_Next(IWICEnumMetadataItem *iface,
 541     ULONG celt, PROPVARIANT *rgeltSchema, PROPVARIANT *rgeltId,
 542     PROPVARIANT *rgeltValue, ULONG *pceltFetched)
 543 {
 544     MetadataHandlerEnum *This = impl_from_IWICEnumMetadataItem(iface);
 545     ULONG new_index;
 546     HRESULT hr=S_FALSE;
 547     int i;
 548
 549     TRACE("(%p,%i)\n", iface, celt);
 550
 551     EnterCriticalSection(&This->parent->lock);
 552
 553     if (This->index >= This->parent->item_count)
 554     {
 555         *pceltFetched = 0;
 556         LeaveCriticalSection(&This->parent->lock);
 557         return S_FALSE;
 558     }
 559
 560     new_index = min(This->parent->item_count, This->index + celt);
 561     *pceltFetched = new_index - This->index;
 562
 563     if (rgeltSchema)
 564     {
 565         for (i=0; SUCCEEDED(hr) && i < *pceltFetched; i++)
 566             hr = PropVariantCopy(&rgeltSchema[i], &This->parent->items[i+This->index].schema);
 567     }
 568
 569     for (i=0; SUCCEEDED(hr) && i < *pceltFetched; i++)
 570         hr = PropVariantCopy(&rgeltId[i], &This->parent->items[i+This->index].id);
 571
 572     if (rgeltValue)
 573     {
 574         for (i=0; SUCCEEDED(hr) && i < *pceltFetched; i++)
 575             hr = PropVariantCopy(&rgeltValue[i], &This->parent->items[i+This->index].value);
 576     }
 577
 578     if (SUCCEEDED(hr))
 579     {
 580         This->index = new_index;
 581     }
 582
 583     LeaveCriticalSection(&This->parent->lock);
 584
 585     return hr;
 586 }
 587
 588 static HRESULT WINAPI MetadataHandlerEnum_Skip(IWICEnumMetadataItem *iface,
 589     ULONG celt)
 590 {
 591     MetadataHandlerEnum *This = impl_from_IWICEnumMetadataItem(iface);
 592
 593     EnterCriticalSection(&This->parent->lock);
 594
 595     This->index += celt;
 596
 597     LeaveCriticalSection(&This->parent->lock);
 598
 599     return S_OK;
 600 }
 601
 602 static HRESULT WINAPI MetadataHandlerEnum_Reset(IWICEnumMetadataItem *iface)
 603 {
 604     MetadataHandlerEnum *This = impl_from_IWICEnumMetadataItem(iface);
 605
 606     EnterCriticalSection(&This->parent->lock);
 607
 608     This->index = 0;
 609
 610     LeaveCriticalSection(&This->parent->lock);
 611
 612     return S_OK;
 613 }
 614
 615 static HRESULT WINAPI MetadataHandlerEnum_Clone(IWICEnumMetadataItem *iface,
 616     IWICEnumMetadataItem **ppIEnumMetadataItem)
 617 {
 618     MetadataHandlerEnum *This = impl_from_IWICEnumMetadataItem(iface);
 619     HRESULT hr;
 620
 621     EnterCriticalSection(&This->parent->lock);
 622
 623     hr = MetadataHandlerEnum_Create(This->parent, This->index, ppIEnumMetadataItem);
 624
 625     LeaveCriticalSection(&This->parent->lock);
 626
 627     return hr;
 628 }
 629
 630 static const IWICEnumMetadataItemVtbl MetadataHandlerEnum_Vtbl = {
 631     MetadataHandlerEnum_QueryInterface,
 632     MetadataHandlerEnum_AddRef,
 633     MetadataHandlerEnum_Release,
 634     MetadataHandlerEnum_Next,
 635     MetadataHandlerEnum_Skip,
 636     MetadataHandlerEnum_Reset,
 637     MetadataHandlerEnum_Clone
 638 };
 639
 640 static HRESULT MetadataHandlerEnum_Create(MetadataHandler *parent, DWORD index,
 641     IWICEnumMetadataItem **ppIEnumMetadataItem)
 642 {
 643     MetadataHandlerEnum *This;
 644
 645     if (!ppIEnumMetadataItem) return E_INVALIDARG;
 646
 647     *ppIEnumMetadataItem = NULL;
 648
 649     This = HeapAlloc(GetProcessHeap(), 0, sizeof(MetadataHandlerEnum));
 650     if (!This) return E_OUTOFMEMORY;
 651
 652     IWICMetadataWriter_AddRef(&parent->IWICMetadataWriter_iface);
 653
 654     This->IWICEnumMetadataItem_iface.lpVtbl = &MetadataHandlerEnum_Vtbl;
 655     This->ref = 1;
 656     This->parent = parent;
 657     This->index = index;
 658
 659     *ppIEnumMetadataItem = &This->IWICEnumMetadataItem_iface;
 660
 661     return S_OK;
 662 }
 663
 664 static HRESULT LoadUnknownMetadata(IStream *input, const GUID *preferred_vendor,
 665     DWORD persist_options, MetadataItem **items, DWORD *item_count)
 666 {
 667     HRESULT hr;
 668     MetadataItem *result;
 669     STATSTG stat;
 670     BYTE *data;
 671     ULONG bytesread;
 672
 673     TRACE("\n");
 674
 675     hr = IStream_Stat(input, &stat, STATFLAG_NONAME);
 676     if (FAILED(hr))
 677         return hr;
 678
 679     data = HeapAlloc(GetProcessHeap(), 0, stat.cbSize.QuadPart);
 680     if (!data) return E_OUTOFMEMORY;
 681
 682     hr = IStream_Read(input, data, stat.cbSize.QuadPart, &bytesread);
 683     if (FAILED(hr))
 684     {
 685         HeapFree(GetProcessHeap(), 0, data);
 686         return hr;
 687     }
 688
 689     result = HeapAlloc(GetProcessHeap(), 0, sizeof(MetadataItem));
 690     if (!result)
 691     {
 692         HeapFree(GetProcessHeap(), 0, data);
 693         return E_OUTOFMEMORY;
 694     }
 695
 696     PropVariantInit(&result[0].schema);
 697     PropVariantInit(&result[0].id);
 698     PropVariantInit(&result[0].value);
 699
 700     result[0].value.vt = VT_BLOB;
 701     result[0].value.u.blob.cbSize = bytesread;
 702     result[0].value.u.blob.pBlobData = data;
 703
 704     *items = result;
 705     *item_count = 1;
 706
 707     return S_OK;
 708 }
 709
 710 static const MetadataHandlerVtbl UnknownMetadataReader_Vtbl = {
 711     0,
 712     &CLSID_WICUnknownMetadataReader,
 713     LoadUnknownMetadata
 714 };
 715
 716 HRESULT UnknownMetadataReader_CreateInstance(IUnknown *pUnkOuter, REFIID iid, void** ppv)
 717 {
 718     return MetadataReader_Create(&UnknownMetadataReader_Vtbl, pUnkOuter, iid, ppv);
 719 }
 720
 721 #define SWAP_USHORT(x) do { if (!native_byte_order) (x) = RtlUshortByteSwap(x); } while(0)
 722 #define SWAP_ULONG(x) do { if (!native_byte_order) (x) = RtlUlongByteSwap(x); } while(0)
 723 #define SWAP_ULONGLONG(x) do { if (!native_byte_order) (x) = RtlUlonglongByteSwap(x); } while(0)
 724
 725 struct IFD_entry
 726 {
 727     SHORT id;
 728     SHORT type;
 729     ULONG count;
 730     LONG  value;
 731 };
 732
 733 #define IFD_BYTE 1
 734 #define IFD_ASCII 2
 735 #define IFD_SHORT 3
 736 #define IFD_LONG 4
 737 #define IFD_RATIONAL 5
 738 #define IFD_SBYTE 6
 739 #define IFD_UNDEFINED 7
 740 #define IFD_SSHORT 8
 741 #define IFD_SLONG 9
 742 #define IFD_SRATIONAL 10
 743 #define IFD_FLOAT 11
 744 #define IFD_DOUBLE 12
 745 #define IFD_IFD 13
 746
 747 static int tag_to_vt(SHORT tag)
 748 {
 749     static const int tag2vt[] =
 750     {
 751         VT_EMPTY, /* 0 */
 752         VT_UI1,   /* IFD_BYTE 1 */
 753         VT_LPSTR, /* IFD_ASCII 2 */
 754         VT_UI2,   /* IFD_SHORT 3 */
 755         VT_UI4,   /* IFD_LONG 4 */
 756         VT_UI8,   /* IFD_RATIONAL 5 */
 757         VT_I1,    /* IFD_SBYTE 6 */
 758         VT_BLOB,  /* IFD_UNDEFINED 7 */
 759         VT_I2,    /* IFD_SSHORT 8 */
 760         VT_I4,    /* IFD_SLONG 9 */
 761         VT_I8,    /* IFD_SRATIONAL 10 */
 762         VT_R4,    /* IFD_FLOAT 11 */
 763         VT_R8,    /* IFD_DOUBLE 12 */
 764         VT_BLOB,  /* IFD_IFD 13 */
 765     };
 766     return (tag > 0 && tag <= 13) ? tag2vt[tag] : VT_BLOB;
 767 }
 768
 769 static HRESULT load_IFD_entry(IStream *input, const struct IFD_entry *entry,
 770                               MetadataItem *item, BOOL native_byte_order)
 771 {
 772     ULONG count, value, i;
 773     SHORT type;
 774     LARGE_INTEGER pos;
 775     HRESULT hr;
 776
 777     item->schema.vt = VT_EMPTY;
 778     item->id.vt = VT_UI2;
 779     item->id.u.uiVal = entry->id;
 780     SWAP_USHORT(item->id.u.uiVal);
 781
 782     count = entry->count;
 783     SWAP_ULONG(count);
 784     type = entry->type;
 785     SWAP_USHORT(type);
 786     item->value.vt = tag_to_vt(type);
 787     value = entry->value;
 788     SWAP_ULONG(value);
 789
 790     switch (type)
 791     {
 792      case IFD_BYTE:
 793      case IFD_SBYTE:
 794         if (!count) count = 1;
 795
 796         if (count <= 4)
 797         {
 798             const BYTE *data = (const BYTE *)&entry->value;
 799
 800             if (count == 1)
 801                 item->value.u.bVal = data[0];
 802             else
 803             {
 804                 item->value.vt |= VT_VECTOR;
 805                 item->value.u.caub.cElems = count;
 806                 item->value.u.caub.pElems = HeapAlloc(GetProcessHeap(), 0, count);
 807                 memcpy(item->value.u.caub.pElems, data, count);
 808             }
 809             break;
 810         }
 811
 812         item->value.vt |= VT_VECTOR;
 813         item->value.u.caub.cElems = count;
 814         item->value.u.caub.pElems = HeapAlloc(GetProcessHeap(), 0, count);
 815         if (!item->value.u.caub.pElems) return E_OUTOFMEMORY;
 816
 817         pos.QuadPart = value;
 818         hr = IStream_Seek(input, pos, SEEK_SET, NULL);
 819         if (FAILED(hr))
 820         {
 821             HeapFree(GetProcessHeap(), 0, item->value.u.caub.pElems);
 822             return hr;
 823         }
 824         hr = IStream_Read(input, item->value.u.caub.pElems, count, NULL);
 825         if (FAILED(hr))
 826         {
 827             HeapFree(GetProcessHeap(), 0, item->value.u.caub.pElems);
 828             return hr;
 829         }
 830         break;
 831     case IFD_SHORT:
 832     case IFD_SSHORT:
 833         if (!count) count = 1;
 834
 835         if (count <= 2)
 836         {
 837             const SHORT *data = (const SHORT *)&entry->value;
 838
 839             if (count == 1)
 840             {
 841                 item->value.u.uiVal = data[0];
 842                 SWAP_USHORT(item->value.u.uiVal);
 843             }
 844             else
 845             {
 846                 item->value.vt |= VT_VECTOR;
 847                 item->value.u.caui.cElems = count;
 848                 item->value.u.caui.pElems = HeapAlloc(GetProcessHeap(), 0, count * 2);
 849                 memcpy(item->value.u.caui.pElems, data, count * 2);
 850                 for (i = 0; i < count; i++)
 851                     SWAP_USHORT(item->value.u.caui.pElems[i]);
 852             }
 853             break;
 854         }
 855
 856         item->value.vt |= VT_VECTOR;
 857         item->value.u.caui.cElems = count;
 858         item->value.u.caui.pElems = HeapAlloc(GetProcessHeap(), 0, count * 2);
 859         if (!item->value.u.caui.pElems) return E_OUTOFMEMORY;
 860
 861         pos.QuadPart = value;
 862         hr = IStream_Seek(input, pos, SEEK_SET, NULL);
 863         if (FAILED(hr))
 864         {
 865             HeapFree(GetProcessHeap(), 0, item->value.u.caui.pElems);
 866             return hr;
 867         }
 868         hr = IStream_Read(input, item->value.u.caui.pElems, count * 2, NULL);
 869         if (FAILED(hr))
 870         {
 871             HeapFree(GetProcessHeap(), 0, item->value.u.caui.pElems);
 872             return hr;
 873         }
 874         for (i = 0; i < count; i++)
 875             SWAP_USHORT(item->value.u.caui.pElems[i]);
 876         break;
 877     case IFD_LONG:
 878     case IFD_SLONG:
 879     case IFD_FLOAT:
 880         if (!count) count = 1;
 881
 882         if (count == 1)
 883         {
 884             item->value.u.ulVal = value;
 885             break;
 886         }
 887
 888         item->value.vt |= VT_VECTOR;
 889         item->value.u.caul.cElems = count;
 890         item->value.u.caul.pElems = HeapAlloc(GetProcessHeap(), 0, count * 4);
 891         if (!item->value.u.caul.pElems) return E_OUTOFMEMORY;
 892
 893         pos.QuadPart = value;
 894         hr = IStream_Seek(input, pos, SEEK_SET, NULL);
 895         if (FAILED(hr))
 896         {
 897             HeapFree(GetProcessHeap(), 0, item->value.u.caul.pElems);
 898             return hr;
 899         }
 900         hr = IStream_Read(input, item->value.u.caul.pElems, count * 4, NULL);
 901         if (FAILED(hr))
 902         {
 903             HeapFree(GetProcessHeap(), 0, item->value.u.caul.pElems);
 904             return hr;
 905         }
 906         for (i = 0; i < count; i++)
 907             SWAP_ULONG(item->value.u.caul.pElems[i]);
 908         break;
 909     case IFD_RATIONAL:
 910     case IFD_SRATIONAL:
 911     case IFD_DOUBLE:
 912         if (!count)
 913         {
 914             FIXME("IFD field type %d, count 0\n", type);
 915             item->value.vt = VT_EMPTY;
 916             break;
 917         }
 918
 919         if (count == 1)
 920         {
 921             ULONGLONG ull;
 922
 923             pos.QuadPart = value;
 924             hr = IStream_Seek(input, pos, SEEK_SET, NULL);
 925             if (FAILED(hr)) return hr;
 926
 927             hr = IStream_Read(input, &ull, sizeof(ull), NULL);
 928             if (FAILED(hr)) return hr;
 929
 930             item->value.u.uhVal.QuadPart = ull;
 931
 932             if (type == IFD_DOUBLE)
 933                 SWAP_ULONGLONG(item->value.u.uhVal.QuadPart);
 934             else
 935             {
 936                 SWAP_ULONG(item->value.u.uhVal.u.LowPart);
 937                 SWAP_ULONG(item->value.u.uhVal.u.HighPart);
 938             }
 939             break;
 940         }
 941         else
 942         {
 943             item->value.vt |= VT_VECTOR;
 944             item->value.u.cauh.cElems = count;
 945             item->value.u.cauh.pElems = HeapAlloc(GetProcessHeap(), 0, count * 8);
 946             if (!item->value.u.cauh.pElems) return E_OUTOFMEMORY;
 947
 948             pos.QuadPart = value;
 949             hr = IStream_Seek(input, pos, SEEK_SET, NULL);
 950             if (FAILED(hr))
 951             {
 952                 HeapFree(GetProcessHeap(), 0, item->value.u.cauh.pElems);
 953                 return hr;
 954             }
 955             hr = IStream_Read(input, item->value.u.cauh.pElems, count * 8, NULL);
 956             if (FAILED(hr))
 957             {
 958                 HeapFree(GetProcessHeap(), 0, item->value.u.cauh.pElems);
 959                 return hr;
 960             }
 961             for (i = 0; i < count; i++)
 962             {
 963                 if (type == IFD_DOUBLE)
 964                     SWAP_ULONGLONG(item->value.u.cauh.pElems[i].QuadPart);
 965                 else
 966                 {
 967                     SWAP_ULONG(item->value.u.cauh.pElems[i].u.LowPart);
 968                     SWAP_ULONG(item->value.u.cauh.pElems[i].u.HighPart);
 969                 }
 970             }
 971         }
 972         break;
 973     case IFD_ASCII:
 974         item->value.u.pszVal = HeapAlloc(GetProcessHeap(), 0, count + 1);
 975         if (!item->value.u.pszVal) return E_OUTOFMEMORY;
 976
 977         if (count <= 4)
 978         {
 979             const char *data = (const char *)&entry->value;
 980             memcpy(item->value.u.pszVal, data, count);
 981             item->value.u.pszVal[count] = 0;
 982             break;
 983         }
 984
 985         pos.QuadPart = value;
 986         hr = IStream_Seek(input, pos, SEEK_SET, NULL);
 987         if (FAILED(hr))
 988         {
 989             HeapFree(GetProcessHeap(), 0, item->value.u.pszVal);
 990             return hr;
 991         }
 992         hr = IStream_Read(input, item->value.u.pszVal, count, NULL);
 993         if (FAILED(hr))
 994         {
 995             HeapFree(GetProcessHeap(), 0, item->value.u.pszVal);
 996             return hr;
 997         }
 998         item->value.u.pszVal[count] = 0;
 999         break;
1000     case IFD_UNDEFINED:
1001         if (!count)
1002         {
1003             FIXME("IFD field type %d, count 0\n", type);
1004             item->value.vt = VT_EMPTY;
1005             break;
1006         }
1007
1008         item->value.u.blob.pBlobData = HeapAlloc(GetProcessHeap(), 0, count);
1009         if (!item->value.u.blob.pBlobData) return E_OUTOFMEMORY;
1010
1011         item->value.u.blob.cbSize = count;
1012
1013         if (count <= 4)
1014         {
1015             const char *data = (const char *)&entry->value;
1016             memcpy(item->value.u.blob.pBlobData, data, count);
1017             break;
1018         }
1019
1020         pos.QuadPart = value;
1021         hr = IStream_Seek(input, pos, SEEK_SET, NULL);
1022         if (FAILED(hr))
1023         {
1024             HeapFree(GetProcessHeap(), 0, item->value.u.blob.pBlobData);
1025             return hr;
1026         }
1027         hr = IStream_Read(input, item->value.u.blob.pBlobData, count, NULL);
1028         if (FAILED(hr))
1029         {
1030             HeapFree(GetProcessHeap(), 0, item->value.u.blob.pBlobData);
1031             return hr;
1032         }
1033         break;
1034     default:
1035         FIXME("loading field of type %d, count %u is not implemented\n", type, count);
1036         break;
1037     }
1038     return S_OK;
1039 }
1040
1041 static HRESULT LoadIfdMetadata(IStream *input, const GUID *preferred_vendor,
1042     DWORD persist_options, MetadataItem **items, DWORD *item_count)
1043 {
1044     HRESULT hr;
1045     MetadataItem *result;
1046     USHORT count, i;
1047     struct IFD_entry *entry;
1048     BOOL native_byte_order = TRUE;
1049
1050     TRACE("\n");
1051
1052 #ifdef WORDS_BIGENDIAN
1053     if (persist_options & WICPersistOptionsLittleEndian)
1054 #else
1055     if (persist_options & WICPersistOptionsBigEndian)
1056 #endif
1057         native_byte_order = FALSE;
1058
1059     hr = IStream_Read(input, &count, sizeof(count), NULL);
1060     if (FAILED(hr)) return hr;
1061
1062     SWAP_USHORT(count);
1063
1064     entry = HeapAlloc(GetProcessHeap(), 0, count * sizeof(*entry));
1065     if (!entry) return E_OUTOFMEMORY;
1066
1067     hr = IStream_Read(input, entry, count * sizeof(*entry), NULL);
1068     if (FAILED(hr))
1069     {
1070         HeapFree(GetProcessHeap(), 0, entry);
1071         return hr;
1072     }
1073
1074     /* limit number of IFDs to 4096 to avoid infinite loop */
1075     for (i = 0; i < 4096; i++)
1076     {
1077         ULONG next_ifd_offset;
1078         LARGE_INTEGER pos;
1079         USHORT next_ifd_count;
1080
1081         hr = IStream_Read(input, &next_ifd_offset, sizeof(next_ifd_offset), NULL);
1082         if (FAILED(hr)) break;
1083
1084         SWAP_ULONG(next_ifd_offset);
1085         if (!next_ifd_offset) break;
1086
1087         pos.QuadPart = next_ifd_offset;
1088         hr = IStream_Seek(input, pos, SEEK_SET, NULL);
1089         if (FAILED(hr)) break;
1090
1091         hr = IStream_Read(input, &next_ifd_count, sizeof(next_ifd_count), NULL);
1092         if (FAILED(hr)) break;
1093
1094         SWAP_USHORT(next_ifd_count);
1095
1096         pos.QuadPart = next_ifd_count * sizeof(*entry);
1097         hr = IStream_Seek(input, pos, SEEK_CUR, NULL);
1098         if (FAILED(hr)) break;
1099     }
1100
1101     if (FAILED(hr) || i == 4096)
1102     {
1103         HeapFree(GetProcessHeap(), 0, entry);
1104         return WINCODEC_ERR_BADMETADATAHEADER;
1105     }
1106
1107     result = HeapAlloc(GetProcessHeap(), 0, count * sizeof(*result));
1108     if (!result)
1109     {
1110         HeapFree(GetProcessHeap(), 0, entry);
1111         return E_OUTOFMEMORY;
1112     }
1113
1114     for (i = 0; i < count; i++)
1115     {
1116         hr = load_IFD_entry(input, &entry[i], &result[i], native_byte_order);
1117         if (FAILED(hr))
1118         {
1119             HeapFree(GetProcessHeap(), 0, entry);
1120             HeapFree(GetProcessHeap(), 0, result);
1121             return hr;
1122         }
1123     }
1124
1125     HeapFree(GetProcessHeap(), 0, entry);
1126
1127     *items = result;
1128     *item_count = count;
1129
1130     return S_OK;
1131 }
1132
1133 static const MetadataHandlerVtbl IfdMetadataReader_Vtbl = {
1134     0,
1135     &CLSID_WICIfdMetadataReader,
1136     LoadIfdMetadata
1137 };
1138
1139 HRESULT IfdMetadataReader_CreateInstance(IUnknown *pUnkOuter, REFIID iid, void **ppv)
1140 {
1141     return MetadataReader_Create(&IfdMetadataReader_Vtbl, pUnkOuter, iid, ppv);
1142 }