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     MetadataHandler *This = impl_from_IWICPersistStream(iface);
 384     TRACE("(%p,%p)\n", iface, pStm);
 385     return IWICPersistStream_LoadEx(&This->IWICPersistStream_iface, pStm, NULL, WICPersistOptionsDefault);
 386 }
 387
 388 static HRESULT WINAPI MetadataHandler_Save(IWICPersistStream *iface,
 389     IStream *pStm, BOOL fClearDirty)
 390 {
 391     FIXME("(%p,%p,%i): stub\n", iface, pStm, fClearDirty);
 392     return E_NOTIMPL;
 393 }
 394
 395 static HRESULT WINAPI MetadataHandler_GetSizeMax(IWICPersistStream *iface,
 396     ULARGE_INTEGER *pcbSize)
 397 {
 398     FIXME("(%p,%p): stub\n", iface, pcbSize);
 399     return E_NOTIMPL;
 400 }
 401
 402 static HRESULT WINAPI MetadataHandler_LoadEx(IWICPersistStream *iface,
 403     IStream *pIStream, const GUID *pguidPreferredVendor, DWORD dwPersistOptions)
 404 {
 405     MetadataHandler *This = impl_from_IWICPersistStream(iface);
 406     HRESULT hr;
 407     MetadataItem *new_items=NULL;
 408     DWORD item_count=0;
 409
 410     TRACE("(%p,%p,%s,%x)\n", iface, pIStream, debugstr_guid(pguidPreferredVendor), dwPersistOptions);
 411
 412     EnterCriticalSection(&This->lock);
 413
 414     hr = This->vtable->fnLoad(pIStream, pguidPreferredVendor, dwPersistOptions,
 415         &new_items, &item_count);
 416
 417     if (SUCCEEDED(hr))
 418     {
 419         MetadataHandler_FreeItems(This);
 420         This->items = new_items;
 421         This->item_count = item_count;
 422     }
 423
 424     LeaveCriticalSection(&This->lock);
 425
 426     return hr;
 427 }
 428
 429 static HRESULT WINAPI MetadataHandler_SaveEx(IWICPersistStream *iface,
 430     IStream *pIStream, DWORD dwPersistOptions, BOOL fClearDirty)
 431 {
 432     FIXME("(%p,%p,%x,%i): stub\n", iface, pIStream, dwPersistOptions, fClearDirty);
 433     return E_NOTIMPL;
 434 }
 435
 436 static const IWICPersistStreamVtbl MetadataHandler_PersistStream_Vtbl = {
 437     MetadataHandler_PersistStream_QueryInterface,
 438     MetadataHandler_PersistStream_AddRef,
 439     MetadataHandler_PersistStream_Release,
 440     MetadataHandler_GetClassID,
 441     MetadataHandler_IsDirty,
 442     MetadataHandler_Load,
 443     MetadataHandler_Save,
 444     MetadataHandler_GetSizeMax,
 445     MetadataHandler_LoadEx,
 446     MetadataHandler_SaveEx
 447 };
 448
 449 static HRESULT MetadataReader_Create(const MetadataHandlerVtbl *vtable, IUnknown *pUnkOuter, REFIID iid, void** ppv)
 450 {
 451     MetadataHandler *This;
 452     HRESULT hr;
 453
 454     TRACE("%s\n", debugstr_guid(vtable->clsid));
 455
 456     *ppv = NULL;
 457
 458     if (pUnkOuter) return CLASS_E_NOAGGREGATION;
 459
 460     This = HeapAlloc(GetProcessHeap(), 0, sizeof(MetadataHandler));
 461     if (!This) return E_OUTOFMEMORY;
 462
 463     This->IWICMetadataWriter_iface.lpVtbl = &MetadataHandler_Vtbl;
 464     This->IWICPersistStream_iface.lpVtbl = &MetadataHandler_PersistStream_Vtbl;
 465     This->ref = 1;
 466     This->vtable = vtable;
 467     This->items = NULL;
 468     This->item_count = 0;
 469
 470     InitializeCriticalSection(&This->lock);
 471     This->lock.DebugInfo->Spare[0] = (DWORD_PTR)(__FILE__ ": MetadataHandler.lock");
 472
 473     hr = IWICMetadataWriter_QueryInterface(&This->IWICMetadataWriter_iface, iid, ppv);
 474
 475     IWICMetadataWriter_Release(&This->IWICMetadataWriter_iface);
 476
 477     return hr;
 478 }
 479
 480 typedef struct MetadataHandlerEnum {
 481     IWICEnumMetadataItem IWICEnumMetadataItem_iface;
 482     LONG ref;
 483     MetadataHandler *parent;
 484     DWORD index;
 485 } MetadataHandlerEnum;
 486
 487 static inline MetadataHandlerEnum *impl_from_IWICEnumMetadataItem(IWICEnumMetadataItem *iface)
 488 {
 489     return CONTAINING_RECORD(iface, MetadataHandlerEnum, IWICEnumMetadataItem_iface);
 490 }
 491
 492 static HRESULT WINAPI MetadataHandlerEnum_QueryInterface(IWICEnumMetadataItem *iface, REFIID iid,
 493     void **ppv)
 494 {
 495     MetadataHandlerEnum *This = impl_from_IWICEnumMetadataItem(iface);
 496     TRACE("(%p,%s,%p)\n", iface, debugstr_guid(iid), ppv);
 497
 498     if (!ppv) return E_INVALIDARG;
 499
 500     if (IsEqualIID(&IID_IUnknown, iid) ||
 501         IsEqualIID(&IID_IWICEnumMetadataItem, iid))
 502     {
 503         *ppv = &This->IWICEnumMetadataItem_iface;
 504     }
 505     else
 506     {
 507         *ppv = NULL;
 508         return E_NOINTERFACE;
 509     }
 510
 511     IUnknown_AddRef((IUnknown*)*ppv);
 512     return S_OK;
 513 }
 514
 515 static ULONG WINAPI MetadataHandlerEnum_AddRef(IWICEnumMetadataItem *iface)
 516 {
 517     MetadataHandlerEnum *This = impl_from_IWICEnumMetadataItem(iface);
 518     ULONG ref = InterlockedIncrement(&This->ref);
 519
 520     TRACE("(%p) refcount=%u\n", iface, ref);
 521
 522     return ref;
 523 }
 524
 525 static ULONG WINAPI MetadataHandlerEnum_Release(IWICEnumMetadataItem *iface)
 526 {
 527     MetadataHandlerEnum *This = impl_from_IWICEnumMetadataItem(iface);
 528     ULONG ref = InterlockedDecrement(&This->ref);
 529
 530     TRACE("(%p) refcount=%u\n", iface, ref);
 531
 532     if (ref == 0)
 533     {
 534         IWICMetadataWriter_Release(&This->parent->IWICMetadataWriter_iface);
 535         HeapFree(GetProcessHeap(), 0, This);
 536     }
 537
 538     return ref;
 539 }
 540
 541 static HRESULT WINAPI MetadataHandlerEnum_Next(IWICEnumMetadataItem *iface,
 542     ULONG celt, PROPVARIANT *rgeltSchema, PROPVARIANT *rgeltId,
 543     PROPVARIANT *rgeltValue, ULONG *pceltFetched)
 544 {
 545     MetadataHandlerEnum *This = impl_from_IWICEnumMetadataItem(iface);
 546     ULONG new_index;
 547     HRESULT hr=S_FALSE;
 548     int i;
 549
 550     TRACE("(%p,%i)\n", iface, celt);
 551
 552     EnterCriticalSection(&This->parent->lock);
 553
 554     if (This->index >= This->parent->item_count)
 555     {
 556         *pceltFetched = 0;
 557         LeaveCriticalSection(&This->parent->lock);
 558         return S_FALSE;
 559     }
 560
 561     new_index = min(This->parent->item_count, This->index + celt);
 562     *pceltFetched = new_index - This->index;
 563
 564     if (rgeltSchema)
 565     {
 566         for (i=0; SUCCEEDED(hr) && i < *pceltFetched; i++)
 567             hr = PropVariantCopy(&rgeltSchema[i], &This->parent->items[i+This->index].schema);
 568     }
 569
 570     for (i=0; SUCCEEDED(hr) && i < *pceltFetched; i++)
 571         hr = PropVariantCopy(&rgeltId[i], &This->parent->items[i+This->index].id);
 572
 573     if (rgeltValue)
 574     {
 575         for (i=0; SUCCEEDED(hr) && i < *pceltFetched; i++)
 576             hr = PropVariantCopy(&rgeltValue[i], &This->parent->items[i+This->index].value);
 577     }
 578
 579     if (SUCCEEDED(hr))
 580     {
 581         This->index = new_index;
 582     }
 583
 584     LeaveCriticalSection(&This->parent->lock);
 585
 586     return hr;
 587 }
 588
 589 static HRESULT WINAPI MetadataHandlerEnum_Skip(IWICEnumMetadataItem *iface,
 590     ULONG celt)
 591 {
 592     MetadataHandlerEnum *This = impl_from_IWICEnumMetadataItem(iface);
 593
 594     EnterCriticalSection(&This->parent->lock);
 595
 596     This->index += celt;
 597
 598     LeaveCriticalSection(&This->parent->lock);
 599
 600     return S_OK;
 601 }
 602
 603 static HRESULT WINAPI MetadataHandlerEnum_Reset(IWICEnumMetadataItem *iface)
 604 {
 605     MetadataHandlerEnum *This = impl_from_IWICEnumMetadataItem(iface);
 606
 607     EnterCriticalSection(&This->parent->lock);
 608
 609     This->index = 0;
 610
 611     LeaveCriticalSection(&This->parent->lock);
 612
 613     return S_OK;
 614 }
 615
 616 static HRESULT WINAPI MetadataHandlerEnum_Clone(IWICEnumMetadataItem *iface,
 617     IWICEnumMetadataItem **ppIEnumMetadataItem)
 618 {
 619     MetadataHandlerEnum *This = impl_from_IWICEnumMetadataItem(iface);
 620     HRESULT hr;
 621
 622     EnterCriticalSection(&This->parent->lock);
 623
 624     hr = MetadataHandlerEnum_Create(This->parent, This->index, ppIEnumMetadataItem);
 625
 626     LeaveCriticalSection(&This->parent->lock);
 627
 628     return hr;
 629 }
 630
 631 static const IWICEnumMetadataItemVtbl MetadataHandlerEnum_Vtbl = {
 632     MetadataHandlerEnum_QueryInterface,
 633     MetadataHandlerEnum_AddRef,
 634     MetadataHandlerEnum_Release,
 635     MetadataHandlerEnum_Next,
 636     MetadataHandlerEnum_Skip,
 637     MetadataHandlerEnum_Reset,
 638     MetadataHandlerEnum_Clone
 639 };
 640
 641 static HRESULT MetadataHandlerEnum_Create(MetadataHandler *parent, DWORD index,
 642     IWICEnumMetadataItem **ppIEnumMetadataItem)
 643 {
 644     MetadataHandlerEnum *This;
 645
 646     if (!ppIEnumMetadataItem) return E_INVALIDARG;
 647
 648     *ppIEnumMetadataItem = NULL;
 649
 650     This = HeapAlloc(GetProcessHeap(), 0, sizeof(MetadataHandlerEnum));
 651     if (!This) return E_OUTOFMEMORY;
 652
 653     IWICMetadataWriter_AddRef(&parent->IWICMetadataWriter_iface);
 654
 655     This->IWICEnumMetadataItem_iface.lpVtbl = &MetadataHandlerEnum_Vtbl;
 656     This->ref = 1;
 657     This->parent = parent;
 658     This->index = index;
 659
 660     *ppIEnumMetadataItem = &This->IWICEnumMetadataItem_iface;
 661
 662     return S_OK;
 663 }
 664
 665 static HRESULT LoadUnknownMetadata(IStream *input, const GUID *preferred_vendor,
 666     DWORD persist_options, MetadataItem **items, DWORD *item_count)
 667 {
 668     HRESULT hr;
 669     MetadataItem *result;
 670     STATSTG stat;
 671     BYTE *data;
 672     ULONG bytesread;
 673
 674     TRACE("\n");
 675
 676     hr = IStream_Stat(input, &stat, STATFLAG_NONAME);
 677     if (FAILED(hr))
 678         return hr;
 679
 680     data = HeapAlloc(GetProcessHeap(), 0, stat.cbSize.QuadPart);
 681     if (!data) return E_OUTOFMEMORY;
 682
 683     hr = IStream_Read(input, data, stat.cbSize.QuadPart, &bytesread);
 684     if (FAILED(hr))
 685     {
 686         HeapFree(GetProcessHeap(), 0, data);
 687         return hr;
 688     }
 689
 690     result = HeapAlloc(GetProcessHeap(), 0, sizeof(MetadataItem));
 691     if (!result)
 692     {
 693         HeapFree(GetProcessHeap(), 0, data);
 694         return E_OUTOFMEMORY;
 695     }
 696
 697     PropVariantInit(&result[0].schema);
 698     PropVariantInit(&result[0].id);
 699     PropVariantInit(&result[0].value);
 700
 701     result[0].value.vt = VT_BLOB;
 702     result[0].value.u.blob.cbSize = bytesread;
 703     result[0].value.u.blob.pBlobData = data;
 704
 705     *items = result;
 706     *item_count = 1;
 707
 708     return S_OK;
 709 }
 710
 711 static const MetadataHandlerVtbl UnknownMetadataReader_Vtbl = {
 712     0,
 713     &CLSID_WICUnknownMetadataReader,
 714     LoadUnknownMetadata
 715 };
 716
 717 HRESULT UnknownMetadataReader_CreateInstance(IUnknown *pUnkOuter, REFIID iid, void** ppv)
 718 {
 719     return MetadataReader_Create(&UnknownMetadataReader_Vtbl, pUnkOuter, iid, ppv);
 720 }
 721
 722 #define SWAP_USHORT(x) do { if (!native_byte_order) (x) = RtlUshortByteSwap(x); } while(0)
 723 #define SWAP_ULONG(x) do { if (!native_byte_order) (x) = RtlUlongByteSwap(x); } while(0)
 724 #define SWAP_ULONGLONG(x) do { if (!native_byte_order) (x) = RtlUlonglongByteSwap(x); } while(0)
 725
 726 struct IFD_entry
 727 {
 728     SHORT id;
 729     SHORT type;
 730     ULONG count;
 731     LONG  value;
 732 };
 733
 734 #define IFD_BYTE 1
 735 #define IFD_ASCII 2
 736 #define IFD_SHORT 3
 737 #define IFD_LONG 4
 738 #define IFD_RATIONAL 5
 739 #define IFD_SBYTE 6
 740 #define IFD_UNDEFINED 7
 741 #define IFD_SSHORT 8
 742 #define IFD_SLONG 9
 743 #define IFD_SRATIONAL 10
 744 #define IFD_FLOAT 11
 745 #define IFD_DOUBLE 12
 746 #define IFD_IFD 13
 747
 748 static int tag_to_vt(SHORT tag)
 749 {
 750     static const int tag2vt[] =
 751     {
 752         VT_EMPTY, /* 0 */
 753         VT_UI1,   /* IFD_BYTE 1 */
 754         VT_LPSTR, /* IFD_ASCII 2 */
 755         VT_UI2,   /* IFD_SHORT 3 */
 756         VT_UI4,   /* IFD_LONG 4 */
 757         VT_UI8,   /* IFD_RATIONAL 5 */
 758         VT_I1,    /* IFD_SBYTE 6 */
 759         VT_BLOB,  /* IFD_UNDEFINED 7 */
 760         VT_I2,    /* IFD_SSHORT 8 */
 761         VT_I4,    /* IFD_SLONG 9 */
 762         VT_I8,    /* IFD_SRATIONAL 10 */
 763         VT_R4,    /* IFD_FLOAT 11 */
 764         VT_R8,    /* IFD_DOUBLE 12 */
 765         VT_BLOB,  /* IFD_IFD 13 */
 766     };
 767     return (tag > 0 && tag <= 13) ? tag2vt[tag] : VT_BLOB;
 768 }
 769
 770 static HRESULT load_IFD_entry(IStream *input, const struct IFD_entry *entry,
 771                               MetadataItem *item, BOOL native_byte_order)
 772 {
 773     ULONG count, value, i;
 774     SHORT type;
 775     LARGE_INTEGER pos;
 776     HRESULT hr;
 777
 778     item->schema.vt = VT_EMPTY;
 779     item->id.vt = VT_UI2;
 780     item->id.u.uiVal = entry->id;
 781     SWAP_USHORT(item->id.u.uiVal);
 782
 783     count = entry->count;
 784     SWAP_ULONG(count);
 785     type = entry->type;
 786     SWAP_USHORT(type);
 787     item->value.vt = tag_to_vt(type);
 788     value = entry->value;
 789     SWAP_ULONG(value);
 790
 791     switch (type)
 792     {
 793      case IFD_BYTE:
 794      case IFD_SBYTE:
 795         if (!count) count = 1;
 796
 797         if (count <= 4)
 798         {
 799             const BYTE *data = (const BYTE *)&entry->value;
 800
 801             if (count == 1)
 802                 item->value.u.bVal = data[0];
 803             else
 804             {
 805                 item->value.vt |= VT_VECTOR;
 806                 item->value.u.caub.cElems = count;
 807                 item->value.u.caub.pElems = HeapAlloc(GetProcessHeap(), 0, count);
 808                 memcpy(item->value.u.caub.pElems, data, count);
 809             }
 810             break;
 811         }
 812
 813         item->value.vt |= VT_VECTOR;
 814         item->value.u.caub.cElems = count;
 815         item->value.u.caub.pElems = HeapAlloc(GetProcessHeap(), 0, count);
 816         if (!item->value.u.caub.pElems) return E_OUTOFMEMORY;
 817
 818         pos.QuadPart = value;
 819         hr = IStream_Seek(input, pos, SEEK_SET, NULL);
 820         if (FAILED(hr))
 821         {
 822             HeapFree(GetProcessHeap(), 0, item->value.u.caub.pElems);
 823             return hr;
 824         }
 825         hr = IStream_Read(input, item->value.u.caub.pElems, count, NULL);
 826         if (FAILED(hr))
 827         {
 828             HeapFree(GetProcessHeap(), 0, item->value.u.caub.pElems);
 829             return hr;
 830         }
 831         break;
 832     case IFD_SHORT:
 833     case IFD_SSHORT:
 834         if (!count) count = 1;
 835
 836         if (count <= 2)
 837         {
 838             const SHORT *data = (const SHORT *)&entry->value;
 839
 840             if (count == 1)
 841             {
 842                 item->value.u.uiVal = data[0];
 843                 SWAP_USHORT(item->value.u.uiVal);
 844             }
 845             else
 846             {
 847                 item->value.vt |= VT_VECTOR;
 848                 item->value.u.caui.cElems = count;
 849                 item->value.u.caui.pElems = HeapAlloc(GetProcessHeap(), 0, count * 2);
 850                 memcpy(item->value.u.caui.pElems, data, count * 2);
 851                 for (i = 0; i < count; i++)
 852                     SWAP_USHORT(item->value.u.caui.pElems[i]);
 853             }
 854             break;
 855         }
 856
 857         item->value.vt |= VT_VECTOR;
 858         item->value.u.caui.cElems = count;
 859         item->value.u.caui.pElems = HeapAlloc(GetProcessHeap(), 0, count * 2);
 860         if (!item->value.u.caui.pElems) return E_OUTOFMEMORY;
 861
 862         pos.QuadPart = value;
 863         hr = IStream_Seek(input, pos, SEEK_SET, NULL);
 864         if (FAILED(hr))
 865         {
 866             HeapFree(GetProcessHeap(), 0, item->value.u.caui.pElems);
 867             return hr;
 868         }
 869         hr = IStream_Read(input, item->value.u.caui.pElems, count * 2, NULL);
 870         if (FAILED(hr))
 871         {
 872             HeapFree(GetProcessHeap(), 0, item->value.u.caui.pElems);
 873             return hr;
 874         }
 875         for (i = 0; i < count; i++)
 876             SWAP_USHORT(item->value.u.caui.pElems[i]);
 877         break;
 878     case IFD_LONG:
 879     case IFD_SLONG:
 880     case IFD_FLOAT:
 881         if (!count) count = 1;
 882
 883         if (count == 1)
 884         {
 885             item->value.u.ulVal = value;
 886             break;
 887         }
 888
 889         item->value.vt |= VT_VECTOR;
 890         item->value.u.caul.cElems = count;
 891         item->value.u.caul.pElems = HeapAlloc(GetProcessHeap(), 0, count * 4);
 892         if (!item->value.u.caul.pElems) return E_OUTOFMEMORY;
 893
 894         pos.QuadPart = value;
 895         hr = IStream_Seek(input, pos, SEEK_SET, NULL);
 896         if (FAILED(hr))
 897         {
 898             HeapFree(GetProcessHeap(), 0, item->value.u.caul.pElems);
 899             return hr;
 900         }
 901         hr = IStream_Read(input, item->value.u.caul.pElems, count * 4, NULL);
 902         if (FAILED(hr))
 903         {
 904             HeapFree(GetProcessHeap(), 0, item->value.u.caul.pElems);
 905             return hr;
 906         }
 907         for (i = 0; i < count; i++)
 908             SWAP_ULONG(item->value.u.caul.pElems[i]);
 909         break;
 910     case IFD_RATIONAL:
 911     case IFD_SRATIONAL:
 912     case IFD_DOUBLE:
 913         if (!count)
 914         {
 915             FIXME("IFD field type %d, count 0\n", type);
 916             item->value.vt = VT_EMPTY;
 917             break;
 918         }
 919
 920         if (count == 1)
 921         {
 922             ULONGLONG ull;
 923
 924             pos.QuadPart = value;
 925             hr = IStream_Seek(input, pos, SEEK_SET, NULL);
 926             if (FAILED(hr)) return hr;
 927
 928             hr = IStream_Read(input, &ull, sizeof(ull), NULL);
 929             if (FAILED(hr)) return hr;
 930
 931             item->value.u.uhVal.QuadPart = ull;
 932
 933             if (type == IFD_DOUBLE)
 934                 SWAP_ULONGLONG(item->value.u.uhVal.QuadPart);
 935             else
 936             {
 937                 SWAP_ULONG(item->value.u.uhVal.u.LowPart);
 938                 SWAP_ULONG(item->value.u.uhVal.u.HighPart);
 939             }
 940             break;
 941         }
 942         else
 943         {
 944             item->value.vt |= VT_VECTOR;
 945             item->value.u.cauh.cElems = count;
 946             item->value.u.cauh.pElems = HeapAlloc(GetProcessHeap(), 0, count * 8);
 947             if (!item->value.u.cauh.pElems) return E_OUTOFMEMORY;
 948
 949             pos.QuadPart = value;
 950             hr = IStream_Seek(input, pos, SEEK_SET, NULL);
 951             if (FAILED(hr))
 952             {
 953                 HeapFree(GetProcessHeap(), 0, item->value.u.cauh.pElems);
 954                 return hr;
 955             }
 956             hr = IStream_Read(input, item->value.u.cauh.pElems, count * 8, NULL);
 957             if (FAILED(hr))
 958             {
 959                 HeapFree(GetProcessHeap(), 0, item->value.u.cauh.pElems);
 960                 return hr;
 961             }
 962             for (i = 0; i < count; i++)
 963             {
 964                 if (type == IFD_DOUBLE)
 965                     SWAP_ULONGLONG(item->value.u.cauh.pElems[i].QuadPart);
 966                 else
 967                 {
 968                     SWAP_ULONG(item->value.u.cauh.pElems[i].u.LowPart);
 969                     SWAP_ULONG(item->value.u.cauh.pElems[i].u.HighPart);
 970                 }
 971             }
 972         }
 973         break;
 974     case IFD_ASCII:
 975         item->value.u.pszVal = HeapAlloc(GetProcessHeap(), 0, count + 1);
 976         if (!item->value.u.pszVal) return E_OUTOFMEMORY;
 977
 978         if (count <= 4)
 979         {
 980             const char *data = (const char *)&entry->value;
 981             memcpy(item->value.u.pszVal, data, count);
 982             item->value.u.pszVal[count] = 0;
 983             break;
 984         }
 985
 986         pos.QuadPart = value;
 987         hr = IStream_Seek(input, pos, SEEK_SET, NULL);
 988         if (FAILED(hr))
 989         {
 990             HeapFree(GetProcessHeap(), 0, item->value.u.pszVal);
 991             return hr;
 992         }
 993         hr = IStream_Read(input, item->value.u.pszVal, count, NULL);
 994         if (FAILED(hr))
 995         {
 996             HeapFree(GetProcessHeap(), 0, item->value.u.pszVal);
 997             return hr;
 998         }
 999         item->value.u.pszVal[count] = 0;
1000         break;
1001     case IFD_UNDEFINED:
1002         if (!count)
1003         {
1004             FIXME("IFD field type %d, count 0\n", type);
1005             item->value.vt = VT_EMPTY;
1006             break;
1007         }
1008
1009         item->value.u.blob.pBlobData = HeapAlloc(GetProcessHeap(), 0, count);
1010         if (!item->value.u.blob.pBlobData) return E_OUTOFMEMORY;
1011
1012         item->value.u.blob.cbSize = count;
1013
1014         if (count <= 4)
1015         {
1016             const char *data = (const char *)&entry->value;
1017             memcpy(item->value.u.blob.pBlobData, data, count);
1018             break;
1019         }
1020
1021         pos.QuadPart = value;
1022         hr = IStream_Seek(input, pos, SEEK_SET, NULL);
1023         if (FAILED(hr))
1024         {
1025             HeapFree(GetProcessHeap(), 0, item->value.u.blob.pBlobData);
1026             return hr;
1027         }
1028         hr = IStream_Read(input, item->value.u.blob.pBlobData, count, NULL);
1029         if (FAILED(hr))
1030         {
1031             HeapFree(GetProcessHeap(), 0, item->value.u.blob.pBlobData);
1032             return hr;
1033         }
1034         break;
1035     default:
1036         FIXME("loading field of type %d, count %u is not implemented\n", type, count);
1037         break;
1038     }
1039     return S_OK;
1040 }
1041
1042 static HRESULT LoadIfdMetadata(IStream *input, const GUID *preferred_vendor,
1043     DWORD persist_options, MetadataItem **items, DWORD *item_count)
1044 {
1045     HRESULT hr;
1046     MetadataItem *result;
1047     USHORT count, i;
1048     struct IFD_entry *entry;
1049     BOOL native_byte_order = TRUE;
1050
1051     TRACE("\n");
1052
1053 #ifdef WORDS_BIGENDIAN
1054     if (persist_options & WICPersistOptionsLittleEndian)
1055 #else
1056     if (persist_options & WICPersistOptionsBigEndian)
1057 #endif
1058         native_byte_order = FALSE;
1059
1060     hr = IStream_Read(input, &count, sizeof(count), NULL);
1061     if (FAILED(hr)) return hr;
1062
1063     SWAP_USHORT(count);
1064
1065     entry = HeapAlloc(GetProcessHeap(), 0, count * sizeof(*entry));
1066     if (!entry) return E_OUTOFMEMORY;
1067
1068     hr = IStream_Read(input, entry, count * sizeof(*entry), NULL);
1069     if (FAILED(hr))
1070     {
1071         HeapFree(GetProcessHeap(), 0, entry);
1072         return hr;
1073     }
1074
1075     /* limit number of IFDs to 4096 to avoid infinite loop */
1076     for (i = 0; i < 4096; i++)
1077     {
1078         ULONG next_ifd_offset;
1079         LARGE_INTEGER pos;
1080         USHORT next_ifd_count;
1081
1082         hr = IStream_Read(input, &next_ifd_offset, sizeof(next_ifd_offset), NULL);
1083         if (FAILED(hr)) break;
1084
1085         SWAP_ULONG(next_ifd_offset);
1086         if (!next_ifd_offset) break;
1087
1088         pos.QuadPart = next_ifd_offset;
1089         hr = IStream_Seek(input, pos, SEEK_SET, NULL);
1090         if (FAILED(hr)) break;
1091
1092         hr = IStream_Read(input, &next_ifd_count, sizeof(next_ifd_count), NULL);
1093         if (FAILED(hr)) break;
1094
1095         SWAP_USHORT(next_ifd_count);
1096
1097         pos.QuadPart = next_ifd_count * sizeof(*entry);
1098         hr = IStream_Seek(input, pos, SEEK_CUR, NULL);
1099         if (FAILED(hr)) break;
1100     }
1101
1102     if (FAILED(hr) || i == 4096)
1103     {
1104         HeapFree(GetProcessHeap(), 0, entry);
1105         return WINCODEC_ERR_BADMETADATAHEADER;
1106     }
1107
1108     result = HeapAlloc(GetProcessHeap(), 0, count * sizeof(*result));
1109     if (!result)
1110     {
1111         HeapFree(GetProcessHeap(), 0, entry);
1112         return E_OUTOFMEMORY;
1113     }
1114
1115     for (i = 0; i < count; i++)
1116     {
1117         hr = load_IFD_entry(input, &entry[i], &result[i], native_byte_order);
1118         if (FAILED(hr))
1119         {
1120             HeapFree(GetProcessHeap(), 0, entry);
1121             HeapFree(GetProcessHeap(), 0, result);
1122             return hr;
1123         }
1124     }
1125
1126     HeapFree(GetProcessHeap(), 0, entry);
1127
1128     *items = result;
1129     *item_count = count;
1130
1131     return S_OK;
1132 }
1133
1134 static const MetadataHandlerVtbl IfdMetadataReader_Vtbl = {
1135     0,
1136     &CLSID_WICIfdMetadataReader,
1137     LoadIfdMetadata
1138 };
1139
1140 HRESULT IfdMetadataReader_CreateInstance(IUnknown *pUnkOuter, REFIID iid, void **ppv)
1141 {
1142     return MetadataReader_Create(&IfdMetadataReader_Vtbl, pUnkOuter, iid, ppv);
1143 }