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     DWORD 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 (v1->vt == VT_LPSTR && v2->vt == VT_LPSTR)
 259     {
 260         return lstrcmpA(v1->u.pszVal, v2->u.pszVal);
 261     }
 262
 263     if (v1->vt == VT_LPWSTR && v2->vt == VT_LPWSTR)
 264     {
 265         return lstrcmpiW(v1->u.pwszVal, v2->u.pwszVal);
 266     }
 267
 268     if (!get_int_value(v1, &value1)) return -1;
 269     if (!get_int_value(v2, &value2)) return -1;
 270
 271     value1 -= value2;
 272     if (value1) return value1 < 0 ? -1 : 1;
 273     return 0;
 274 }
 275
 276 static HRESULT WINAPI MetadataHandler_GetValue(IWICMetadataWriter *iface,
 277     const PROPVARIANT *schema, const PROPVARIANT *id, PROPVARIANT *value)
 278 {
 279     UINT i;
 280     HRESULT hr = WINCODEC_ERR_PROPERTYNOTFOUND;
 281     MetadataHandler *This = impl_from_IWICMetadataWriter(iface);
 282
 283     TRACE("(%p,%p,%p,%p)\n", iface, schema, id, value);
 284
 285     if (!id) return E_INVALIDARG;
 286
 287     EnterCriticalSection(&This->lock);
 288
 289     for (i = 0; i < This->item_count; i++)
 290     {
 291         if (schema && This->items[i].schema.vt != VT_EMPTY)
 292         {
 293             if (propvar_cmp(schema, &This->items[i].schema) != 0) continue;
 294         }
 295
 296         if (propvar_cmp(id, &This->items[i].id) != 0) continue;
 297
 298         hr = value ? PropVariantCopy(value, &This->items[i].value) : S_OK;
 299         break;
 300     }
 301
 302     LeaveCriticalSection(&This->lock);
 303     return hr;
 304 }
 305
 306 static HRESULT WINAPI MetadataHandler_GetEnumerator(IWICMetadataWriter *iface,
 307     IWICEnumMetadataItem **ppIEnumMetadata)
 308 {
 309     MetadataHandler *This = impl_from_IWICMetadataWriter(iface);
 310     TRACE("(%p,%p)\n", iface, ppIEnumMetadata);
 311     return MetadataHandlerEnum_Create(This, 0, ppIEnumMetadata);
 312 }
 313
 314 static HRESULT WINAPI MetadataHandler_SetValue(IWICMetadataWriter *iface,
 315     const PROPVARIANT *pvarSchema, const PROPVARIANT *pvarId, const PROPVARIANT *pvarValue)
 316 {
 317     FIXME("(%p,%p,%p,%p): stub\n", iface, pvarSchema, pvarId, pvarValue);
 318     return E_NOTIMPL;
 319 }
 320
 321 static HRESULT WINAPI MetadataHandler_SetValueByIndex(IWICMetadataWriter *iface,
 322     UINT nIndex, const PROPVARIANT *pvarSchema, const PROPVARIANT *pvarId, const PROPVARIANT *pvarValue)
 323 {
 324     FIXME("(%p,%u,%p,%p,%p): stub\n", iface, nIndex, pvarSchema, pvarId, pvarValue);
 325     return E_NOTIMPL;
 326 }
 327
 328 static HRESULT WINAPI MetadataHandler_RemoveValue(IWICMetadataWriter *iface,
 329     const PROPVARIANT *pvarSchema, const PROPVARIANT *pvarId)
 330 {
 331     FIXME("(%p,%p,%p): stub\n", iface, pvarSchema, pvarId);
 332     return E_NOTIMPL;
 333 }
 334
 335 static HRESULT WINAPI MetadataHandler_RemoveValueByIndex(IWICMetadataWriter *iface,
 336     UINT nIndex)
 337 {
 338     FIXME("(%p,%u): stub\n", iface, nIndex);
 339     return E_NOTIMPL;
 340 }
 341
 342 static const IWICMetadataWriterVtbl MetadataHandler_Vtbl = {
 343     MetadataHandler_QueryInterface,
 344     MetadataHandler_AddRef,
 345     MetadataHandler_Release,
 346     MetadataHandler_GetMetadataFormat,
 347     MetadataHandler_GetMetadataHandlerInfo,
 348     MetadataHandler_GetCount,
 349     MetadataHandler_GetValueByIndex,
 350     MetadataHandler_GetValue,
 351     MetadataHandler_GetEnumerator,
 352     MetadataHandler_SetValue,
 353     MetadataHandler_SetValueByIndex,
 354     MetadataHandler_RemoveValue,
 355     MetadataHandler_RemoveValueByIndex
 356 };
 357
 358 static HRESULT WINAPI MetadataHandler_PersistStream_QueryInterface(IWICPersistStream *iface,
 359     REFIID iid, void **ppv)
 360 {
 361     MetadataHandler *This = impl_from_IWICPersistStream(iface);
 362     return IWICMetadataWriter_QueryInterface(&This->IWICMetadataWriter_iface, iid, ppv);
 363 }
 364
 365 static ULONG WINAPI MetadataHandler_PersistStream_AddRef(IWICPersistStream *iface)
 366 {
 367     MetadataHandler *This = impl_from_IWICPersistStream(iface);
 368     return IWICMetadataWriter_AddRef(&This->IWICMetadataWriter_iface);
 369 }
 370
 371 static ULONG WINAPI MetadataHandler_PersistStream_Release(IWICPersistStream *iface)
 372 {
 373     MetadataHandler *This = impl_from_IWICPersistStream(iface);
 374     return IWICMetadataWriter_Release(&This->IWICMetadataWriter_iface);
 375 }
 376
 377 static HRESULT WINAPI MetadataHandler_GetClassID(IWICPersistStream *iface,
 378     CLSID *pClassID)
 379 {
 380     FIXME("(%p,%p): stub\n", iface, pClassID);
 381     return E_NOTIMPL;
 382 }
 383
 384 static HRESULT WINAPI MetadataHandler_IsDirty(IWICPersistStream *iface)
 385 {
 386     FIXME("(%p): stub\n", iface);
 387     return E_NOTIMPL;
 388 }
 389
 390 static HRESULT WINAPI MetadataHandler_Load(IWICPersistStream *iface,
 391     IStream *pStm)
 392 {
 393     MetadataHandler *This = impl_from_IWICPersistStream(iface);
 394     TRACE("(%p,%p)\n", iface, pStm);
 395     return IWICPersistStream_LoadEx(&This->IWICPersistStream_iface, pStm, NULL, WICPersistOptionsDefault);
 396 }
 397
 398 static HRESULT WINAPI MetadataHandler_Save(IWICPersistStream *iface,
 399     IStream *pStm, BOOL fClearDirty)
 400 {
 401     FIXME("(%p,%p,%i): stub\n", iface, pStm, fClearDirty);
 402     return E_NOTIMPL;
 403 }
 404
 405 static HRESULT WINAPI MetadataHandler_GetSizeMax(IWICPersistStream *iface,
 406     ULARGE_INTEGER *pcbSize)
 407 {
 408     FIXME("(%p,%p): stub\n", iface, pcbSize);
 409     return E_NOTIMPL;
 410 }
 411
 412 static HRESULT WINAPI MetadataHandler_LoadEx(IWICPersistStream *iface,
 413     IStream *pIStream, const GUID *pguidPreferredVendor, DWORD dwPersistOptions)
 414 {
 415     MetadataHandler *This = impl_from_IWICPersistStream(iface);
 416     HRESULT hr;
 417     MetadataItem *new_items=NULL;
 418     DWORD item_count=0;
 419
 420     TRACE("(%p,%p,%s,%x)\n", iface, pIStream, debugstr_guid(pguidPreferredVendor), dwPersistOptions);
 421
 422     EnterCriticalSection(&This->lock);
 423
 424     hr = This->vtable->fnLoad(pIStream, pguidPreferredVendor, dwPersistOptions,
 425         &new_items, &item_count);
 426
 427     if (SUCCEEDED(hr))
 428     {
 429         MetadataHandler_FreeItems(This);
 430         This->items = new_items;
 431         This->item_count = item_count;
 432     }
 433
 434     LeaveCriticalSection(&This->lock);
 435
 436     return hr;
 437 }
 438
 439 static HRESULT WINAPI MetadataHandler_SaveEx(IWICPersistStream *iface,
 440     IStream *pIStream, DWORD dwPersistOptions, BOOL fClearDirty)
 441 {
 442     FIXME("(%p,%p,%x,%i): stub\n", iface, pIStream, dwPersistOptions, fClearDirty);
 443     return E_NOTIMPL;
 444 }
 445
 446 static const IWICPersistStreamVtbl MetadataHandler_PersistStream_Vtbl = {
 447     MetadataHandler_PersistStream_QueryInterface,
 448     MetadataHandler_PersistStream_AddRef,
 449     MetadataHandler_PersistStream_Release,
 450     MetadataHandler_GetClassID,
 451     MetadataHandler_IsDirty,
 452     MetadataHandler_Load,
 453     MetadataHandler_Save,
 454     MetadataHandler_GetSizeMax,
 455     MetadataHandler_LoadEx,
 456     MetadataHandler_SaveEx
 457 };
 458
 459 HRESULT MetadataReader_Create(const MetadataHandlerVtbl *vtable, REFIID iid, void** ppv)
 460 {
 461     MetadataHandler *This;
 462     HRESULT hr;
 463
 464     TRACE("%s\n", debugstr_guid(vtable->clsid));
 465
 466     *ppv = NULL;
 467
 468     This = HeapAlloc(GetProcessHeap(), 0, sizeof(MetadataHandler));
 469     if (!This) return E_OUTOFMEMORY;
 470
 471     This->IWICMetadataWriter_iface.lpVtbl = &MetadataHandler_Vtbl;
 472     This->IWICPersistStream_iface.lpVtbl = &MetadataHandler_PersistStream_Vtbl;
 473     This->ref = 1;
 474     This->vtable = vtable;
 475     This->items = NULL;
 476     This->item_count = 0;
 477
 478     InitializeCriticalSection(&This->lock);
 479     This->lock.DebugInfo->Spare[0] = (DWORD_PTR)(__FILE__ ": MetadataHandler.lock");
 480
 481     hr = IWICMetadataWriter_QueryInterface(&This->IWICMetadataWriter_iface, iid, ppv);
 482
 483     IWICMetadataWriter_Release(&This->IWICMetadataWriter_iface);
 484
 485     return hr;
 486 }
 487
 488 typedef struct MetadataHandlerEnum {
 489     IWICEnumMetadataItem IWICEnumMetadataItem_iface;
 490     LONG ref;
 491     MetadataHandler *parent;
 492     DWORD index;
 493 } MetadataHandlerEnum;
 494
 495 static inline MetadataHandlerEnum *impl_from_IWICEnumMetadataItem(IWICEnumMetadataItem *iface)
 496 {
 497     return CONTAINING_RECORD(iface, MetadataHandlerEnum, IWICEnumMetadataItem_iface);
 498 }
 499
 500 static HRESULT WINAPI MetadataHandlerEnum_QueryInterface(IWICEnumMetadataItem *iface, REFIID iid,
 501     void **ppv)
 502 {
 503     MetadataHandlerEnum *This = impl_from_IWICEnumMetadataItem(iface);
 504     TRACE("(%p,%s,%p)\n", iface, debugstr_guid(iid), ppv);
 505
 506     if (!ppv) return E_INVALIDARG;
 507
 508     if (IsEqualIID(&IID_IUnknown, iid) ||
 509         IsEqualIID(&IID_IWICEnumMetadataItem, iid))
 510     {
 511         *ppv = &This->IWICEnumMetadataItem_iface;
 512     }
 513     else
 514     {
 515         *ppv = NULL;
 516         return E_NOINTERFACE;
 517     }
 518
 519     IUnknown_AddRef((IUnknown*)*ppv);
 520     return S_OK;
 521 }
 522
 523 static ULONG WINAPI MetadataHandlerEnum_AddRef(IWICEnumMetadataItem *iface)
 524 {
 525     MetadataHandlerEnum *This = impl_from_IWICEnumMetadataItem(iface);
 526     ULONG ref = InterlockedIncrement(&This->ref);
 527
 528     TRACE("(%p) refcount=%u\n", iface, ref);
 529
 530     return ref;
 531 }
 532
 533 static ULONG WINAPI MetadataHandlerEnum_Release(IWICEnumMetadataItem *iface)
 534 {
 535     MetadataHandlerEnum *This = impl_from_IWICEnumMetadataItem(iface);
 536     ULONG ref = InterlockedDecrement(&This->ref);
 537
 538     TRACE("(%p) refcount=%u\n", iface, ref);
 539
 540     if (ref == 0)
 541     {
 542         IWICMetadataWriter_Release(&This->parent->IWICMetadataWriter_iface);
 543         HeapFree(GetProcessHeap(), 0, This);
 544     }
 545
 546     return ref;
 547 }
 548
 549 static HRESULT WINAPI MetadataHandlerEnum_Next(IWICEnumMetadataItem *iface,
 550     ULONG celt, PROPVARIANT *rgeltSchema, PROPVARIANT *rgeltId,
 551     PROPVARIANT *rgeltValue, ULONG *pceltFetched)
 552 {
 553     MetadataHandlerEnum *This = impl_from_IWICEnumMetadataItem(iface);
 554     ULONG new_index;
 555     HRESULT hr=S_FALSE;
 556     ULONG i;
 557
 558     TRACE("(%p,%i)\n", iface, celt);
 559
 560     EnterCriticalSection(&This->parent->lock);
 561
 562     if (This->index >= This->parent->item_count)
 563     {
 564         *pceltFetched = 0;
 565         LeaveCriticalSection(&This->parent->lock);
 566         return S_FALSE;
 567     }
 568
 569     new_index = min(This->parent->item_count, This->index + celt);
 570     *pceltFetched = new_index - This->index;
 571
 572     if (rgeltSchema)
 573     {
 574         for (i=0; SUCCEEDED(hr) && i < *pceltFetched; i++)
 575             hr = PropVariantCopy(&rgeltSchema[i], &This->parent->items[i+This->index].schema);
 576     }
 577
 578     for (i=0; SUCCEEDED(hr) && i < *pceltFetched; i++)
 579         hr = PropVariantCopy(&rgeltId[i], &This->parent->items[i+This->index].id);
 580
 581     if (rgeltValue)
 582     {
 583         for (i=0; SUCCEEDED(hr) && i < *pceltFetched; i++)
 584             hr = PropVariantCopy(&rgeltValue[i], &This->parent->items[i+This->index].value);
 585     }
 586
 587     if (SUCCEEDED(hr))
 588     {
 589         This->index = new_index;
 590     }
 591
 592     LeaveCriticalSection(&This->parent->lock);
 593
 594     return hr;
 595 }
 596
 597 static HRESULT WINAPI MetadataHandlerEnum_Skip(IWICEnumMetadataItem *iface,
 598     ULONG celt)
 599 {
 600     MetadataHandlerEnum *This = impl_from_IWICEnumMetadataItem(iface);
 601
 602     EnterCriticalSection(&This->parent->lock);
 603
 604     This->index += celt;
 605
 606     LeaveCriticalSection(&This->parent->lock);
 607
 608     return S_OK;
 609 }
 610
 611 static HRESULT WINAPI MetadataHandlerEnum_Reset(IWICEnumMetadataItem *iface)
 612 {
 613     MetadataHandlerEnum *This = impl_from_IWICEnumMetadataItem(iface);
 614
 615     EnterCriticalSection(&This->parent->lock);
 616
 617     This->index = 0;
 618
 619     LeaveCriticalSection(&This->parent->lock);
 620
 621     return S_OK;
 622 }
 623
 624 static HRESULT WINAPI MetadataHandlerEnum_Clone(IWICEnumMetadataItem *iface,
 625     IWICEnumMetadataItem **ppIEnumMetadataItem)
 626 {
 627     MetadataHandlerEnum *This = impl_from_IWICEnumMetadataItem(iface);
 628     HRESULT hr;
 629
 630     EnterCriticalSection(&This->parent->lock);
 631
 632     hr = MetadataHandlerEnum_Create(This->parent, This->index, ppIEnumMetadataItem);
 633
 634     LeaveCriticalSection(&This->parent->lock);
 635
 636     return hr;
 637 }
 638
 639 static const IWICEnumMetadataItemVtbl MetadataHandlerEnum_Vtbl = {
 640     MetadataHandlerEnum_QueryInterface,
 641     MetadataHandlerEnum_AddRef,
 642     MetadataHandlerEnum_Release,
 643     MetadataHandlerEnum_Next,
 644     MetadataHandlerEnum_Skip,
 645     MetadataHandlerEnum_Reset,
 646     MetadataHandlerEnum_Clone
 647 };
 648
 649 static HRESULT MetadataHandlerEnum_Create(MetadataHandler *parent, DWORD index,
 650     IWICEnumMetadataItem **ppIEnumMetadataItem)
 651 {
 652     MetadataHandlerEnum *This;
 653
 654     if (!ppIEnumMetadataItem) return E_INVALIDARG;
 655
 656     *ppIEnumMetadataItem = NULL;
 657
 658     This = HeapAlloc(GetProcessHeap(), 0, sizeof(MetadataHandlerEnum));
 659     if (!This) return E_OUTOFMEMORY;
 660
 661     IWICMetadataWriter_AddRef(&parent->IWICMetadataWriter_iface);
 662
 663     This->IWICEnumMetadataItem_iface.lpVtbl = &MetadataHandlerEnum_Vtbl;
 664     This->ref = 1;
 665     This->parent = parent;
 666     This->index = index;
 667
 668     *ppIEnumMetadataItem = &This->IWICEnumMetadataItem_iface;
 669
 670     return S_OK;
 671 }
 672
 673 static HRESULT LoadUnknownMetadata(IStream *input, const GUID *preferred_vendor,
 674     DWORD persist_options, MetadataItem **items, DWORD *item_count)
 675 {
 676     HRESULT hr;
 677     MetadataItem *result;
 678     STATSTG stat;
 679     BYTE *data;
 680     ULONG bytesread;
 681
 682     TRACE("\n");
 683
 684     hr = IStream_Stat(input, &stat, STATFLAG_NONAME);
 685     if (FAILED(hr))
 686         return hr;
 687
 688     data = HeapAlloc(GetProcessHeap(), 0, stat.cbSize.QuadPart);
 689     if (!data) return E_OUTOFMEMORY;
 690
 691     hr = IStream_Read(input, data, stat.cbSize.QuadPart, &bytesread);
 692     if (bytesread != stat.cbSize.QuadPart) hr = E_FAIL;
 693     if (hr != S_OK)
 694     {
 695         HeapFree(GetProcessHeap(), 0, data);
 696         return hr;
 697     }
 698
 699     result = HeapAlloc(GetProcessHeap(), 0, sizeof(MetadataItem));
 700     if (!result)
 701     {
 702         HeapFree(GetProcessHeap(), 0, data);
 703         return E_OUTOFMEMORY;
 704     }
 705
 706     PropVariantInit(&result[0].schema);
 707     PropVariantInit(&result[0].id);
 708     PropVariantInit(&result[0].value);
 709
 710     result[0].value.vt = VT_BLOB;
 711     result[0].value.u.blob.cbSize = bytesread;
 712     result[0].value.u.blob.pBlobData = data;
 713
 714     *items = result;
 715     *item_count = 1;
 716
 717     return S_OK;
 718 }
 719
 720 static const MetadataHandlerVtbl UnknownMetadataReader_Vtbl = {
 721     0,
 722     &CLSID_WICUnknownMetadataReader,
 723     LoadUnknownMetadata
 724 };
 725
 726 HRESULT UnknownMetadataReader_CreateInstance(REFIID iid, void** ppv)
 727 {
 728     return MetadataReader_Create(&UnknownMetadataReader_Vtbl, iid, ppv);
 729 }
 730
 731 #define SWAP_USHORT(x) do { if (!native_byte_order) (x) = RtlUshortByteSwap(x); } while(0)
 732 #define SWAP_ULONG(x) do { if (!native_byte_order) (x) = RtlUlongByteSwap(x); } while(0)
 733 #define SWAP_ULONGLONG(x) do { if (!native_byte_order) (x) = RtlUlonglongByteSwap(x); } while(0)
 734
 735 struct IFD_entry
 736 {
 737     SHORT id;
 738     SHORT type;
 739     ULONG count;
 740     LONG  value;
 741 };
 742
 743 #define IFD_BYTE 1
 744 #define IFD_ASCII 2
 745 #define IFD_SHORT 3
 746 #define IFD_LONG 4
 747 #define IFD_RATIONAL 5
 748 #define IFD_SBYTE 6
 749 #define IFD_UNDEFINED 7
 750 #define IFD_SSHORT 8
 751 #define IFD_SLONG 9
 752 #define IFD_SRATIONAL 10
 753 #define IFD_FLOAT 11
 754 #define IFD_DOUBLE 12
 755 #define IFD_IFD 13
 756
 757 static int tag_to_vt(SHORT tag)
 758 {
 759     static const int tag2vt[] =
 760     {
 761         VT_EMPTY, /* 0 */
 762         VT_UI1,   /* IFD_BYTE 1 */
 763         VT_LPSTR, /* IFD_ASCII 2 */
 764         VT_UI2,   /* IFD_SHORT 3 */
 765         VT_UI4,   /* IFD_LONG 4 */
 766         VT_UI8,   /* IFD_RATIONAL 5 */
 767         VT_I1,    /* IFD_SBYTE 6 */
 768         VT_BLOB,  /* IFD_UNDEFINED 7 */
 769         VT_I2,    /* IFD_SSHORT 8 */
 770         VT_I4,    /* IFD_SLONG 9 */
 771         VT_I8,    /* IFD_SRATIONAL 10 */
 772         VT_R4,    /* IFD_FLOAT 11 */
 773         VT_R8,    /* IFD_DOUBLE 12 */
 774         VT_BLOB,  /* IFD_IFD 13 */
 775     };
 776     return (tag > 0 && tag <= 13) ? tag2vt[tag] : VT_BLOB;
 777 }
 778
 779 static HRESULT load_IFD_entry(IStream *input, const struct IFD_entry *entry,
 780                               MetadataItem *item, BOOL native_byte_order)
 781 {
 782     ULONG count, value, i, bytesread;
 783     SHORT type;
 784     LARGE_INTEGER pos;
 785     HRESULT hr;
 786
 787     item->schema.vt = VT_EMPTY;
 788     item->id.vt = VT_UI2;
 789     item->id.u.uiVal = entry->id;
 790     SWAP_USHORT(item->id.u.uiVal);
 791
 792     count = entry->count;
 793     SWAP_ULONG(count);
 794     type = entry->type;
 795     SWAP_USHORT(type);
 796     item->value.vt = tag_to_vt(type);
 797     value = entry->value;
 798     SWAP_ULONG(value);
 799
 800     switch (type)
 801     {
 802      case IFD_BYTE:
 803      case IFD_SBYTE:
 804         if (!count) count = 1;
 805
 806         if (count <= 4)
 807         {
 808             const BYTE *data = (const BYTE *)&entry->value;
 809
 810             if (count == 1)
 811                 item->value.u.bVal = data[0];
 812             else
 813             {
 814                 item->value.vt |= VT_VECTOR;
 815                 item->value.u.caub.cElems = count;
 816                 item->value.u.caub.pElems = HeapAlloc(GetProcessHeap(), 0, count);
 817                 memcpy(item->value.u.caub.pElems, data, count);
 818             }
 819             break;
 820         }
 821
 822         item->value.vt |= VT_VECTOR;
 823         item->value.u.caub.cElems = count;
 824         item->value.u.caub.pElems = HeapAlloc(GetProcessHeap(), 0, count);
 825         if (!item->value.u.caub.pElems) return E_OUTOFMEMORY;
 826
 827         pos.QuadPart = value;
 828         hr = IStream_Seek(input, pos, SEEK_SET, NULL);
 829         if (FAILED(hr))
 830         {
 831             HeapFree(GetProcessHeap(), 0, item->value.u.caub.pElems);
 832             return hr;
 833         }
 834         hr = IStream_Read(input, item->value.u.caub.pElems, count, &bytesread);
 835         if (bytesread != count) hr = E_FAIL;
 836         if (hr != S_OK)
 837         {
 838             HeapFree(GetProcessHeap(), 0, item->value.u.caub.pElems);
 839             return hr;
 840         }
 841         break;
 842     case IFD_SHORT:
 843     case IFD_SSHORT:
 844         if (!count) count = 1;
 845
 846         if (count <= 2)
 847         {
 848             const SHORT *data = (const SHORT *)&entry->value;
 849
 850             if (count == 1)
 851             {
 852                 item->value.u.uiVal = data[0];
 853                 SWAP_USHORT(item->value.u.uiVal);
 854             }
 855             else
 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                 memcpy(item->value.u.caui.pElems, data, count * 2);
 861                 for (i = 0; i < count; i++)
 862                     SWAP_USHORT(item->value.u.caui.pElems[i]);
 863             }
 864             break;
 865         }
 866
 867         item->value.vt |= VT_VECTOR;
 868         item->value.u.caui.cElems = count;
 869         item->value.u.caui.pElems = HeapAlloc(GetProcessHeap(), 0, count * 2);
 870         if (!item->value.u.caui.pElems) return E_OUTOFMEMORY;
 871
 872         pos.QuadPart = value;
 873         hr = IStream_Seek(input, pos, SEEK_SET, NULL);
 874         if (FAILED(hr))
 875         {
 876             HeapFree(GetProcessHeap(), 0, item->value.u.caui.pElems);
 877             return hr;
 878         }
 879         hr = IStream_Read(input, item->value.u.caui.pElems, count * 2, &bytesread);
 880         if (bytesread != count * 2) hr = E_FAIL;
 881         if (hr != S_OK)
 882         {
 883             HeapFree(GetProcessHeap(), 0, item->value.u.caui.pElems);
 884             return hr;
 885         }
 886         for (i = 0; i < count; i++)
 887             SWAP_USHORT(item->value.u.caui.pElems[i]);
 888         break;
 889     case IFD_LONG:
 890     case IFD_SLONG:
 891     case IFD_FLOAT:
 892         if (!count) count = 1;
 893
 894         if (count == 1)
 895         {
 896             item->value.u.ulVal = value;
 897             break;
 898         }
 899
 900         item->value.vt |= VT_VECTOR;
 901         item->value.u.caul.cElems = count;
 902         item->value.u.caul.pElems = HeapAlloc(GetProcessHeap(), 0, count * 4);
 903         if (!item->value.u.caul.pElems) return E_OUTOFMEMORY;
 904
 905         pos.QuadPart = value;
 906         hr = IStream_Seek(input, pos, SEEK_SET, NULL);
 907         if (FAILED(hr))
 908         {
 909             HeapFree(GetProcessHeap(), 0, item->value.u.caul.pElems);
 910             return hr;
 911         }
 912         hr = IStream_Read(input, item->value.u.caul.pElems, count * 4, &bytesread);
 913         if (bytesread != count * 4) hr = E_FAIL;
 914         if (hr != S_OK)
 915         {
 916             HeapFree(GetProcessHeap(), 0, item->value.u.caul.pElems);
 917             return hr;
 918         }
 919         for (i = 0; i < count; i++)
 920             SWAP_ULONG(item->value.u.caul.pElems[i]);
 921         break;
 922     case IFD_RATIONAL:
 923     case IFD_SRATIONAL:
 924     case IFD_DOUBLE:
 925         if (!count)
 926         {
 927             FIXME("IFD field type %d, count 0\n", type);
 928             item->value.vt = VT_EMPTY;
 929             break;
 930         }
 931
 932         if (count == 1)
 933         {
 934             ULONGLONG ull;
 935
 936             pos.QuadPart = value;
 937             hr = IStream_Seek(input, pos, SEEK_SET, NULL);
 938             if (FAILED(hr)) return hr;
 939
 940             hr = IStream_Read(input, &ull, sizeof(ull), &bytesread);
 941             if (bytesread != sizeof(ull)) hr = E_FAIL;
 942             if (hr != S_OK) return hr;
 943
 944             item->value.u.uhVal.QuadPart = ull;
 945
 946             if (type == IFD_DOUBLE)
 947                 SWAP_ULONGLONG(item->value.u.uhVal.QuadPart);
 948             else
 949             {
 950                 SWAP_ULONG(item->value.u.uhVal.u.LowPart);
 951                 SWAP_ULONG(item->value.u.uhVal.u.HighPart);
 952             }
 953             break;
 954         }
 955         else
 956         {
 957             item->value.vt |= VT_VECTOR;
 958             item->value.u.cauh.cElems = count;
 959             item->value.u.cauh.pElems = HeapAlloc(GetProcessHeap(), 0, count * 8);
 960             if (!item->value.u.cauh.pElems) return E_OUTOFMEMORY;
 961
 962             pos.QuadPart = value;
 963             hr = IStream_Seek(input, pos, SEEK_SET, NULL);
 964             if (FAILED(hr))
 965             {
 966                 HeapFree(GetProcessHeap(), 0, item->value.u.cauh.pElems);
 967                 return hr;
 968             }
 969             hr = IStream_Read(input, item->value.u.cauh.pElems, count * 8, &bytesread);
 970             if (bytesread != count * 8) hr = E_FAIL;
 971             if (hr != S_OK)
 972             {
 973                 HeapFree(GetProcessHeap(), 0, item->value.u.cauh.pElems);
 974                 return hr;
 975             }
 976             for (i = 0; i < count; i++)
 977             {
 978                 if (type == IFD_DOUBLE)
 979                     SWAP_ULONGLONG(item->value.u.cauh.pElems[i].QuadPart);
 980                 else
 981                 {
 982                     SWAP_ULONG(item->value.u.cauh.pElems[i].u.LowPart);
 983                     SWAP_ULONG(item->value.u.cauh.pElems[i].u.HighPart);
 984                 }
 985             }
 986         }
 987         break;
 988     case IFD_ASCII:
 989         item->value.u.pszVal = HeapAlloc(GetProcessHeap(), 0, count + 1);
 990         if (!item->value.u.pszVal) return E_OUTOFMEMORY;
 991
 992         if (count <= 4)
 993         {
 994             const char *data = (const char *)&entry->value;
 995             memcpy(item->value.u.pszVal, data, count);
 996             item->value.u.pszVal[count] = 0;
 997             break;
 998         }
 999
1000         pos.QuadPart = value;
1001         hr = IStream_Seek(input, pos, SEEK_SET, NULL);
1002         if (FAILED(hr))
1003         {
1004             HeapFree(GetProcessHeap(), 0, item->value.u.pszVal);
1005             return hr;
1006         }
1007         hr = IStream_Read(input, item->value.u.pszVal, count, &bytesread);
1008         if (bytesread != count) hr = E_FAIL;
1009         if (hr != S_OK)
1010         {
1011             HeapFree(GetProcessHeap(), 0, item->value.u.pszVal);
1012             return hr;
1013         }
1014         item->value.u.pszVal[count] = 0;
1015         break;
1016     case IFD_UNDEFINED:
1017         if (!count)
1018         {
1019             FIXME("IFD field type %d, count 0\n", type);
1020             item->value.vt = VT_EMPTY;
1021             break;
1022         }
1023
1024         item->value.u.blob.pBlobData = HeapAlloc(GetProcessHeap(), 0, count);
1025         if (!item->value.u.blob.pBlobData) return E_OUTOFMEMORY;
1026
1027         item->value.u.blob.cbSize = count;
1028
1029         if (count <= 4)
1030         {
1031             const char *data = (const char *)&entry->value;
1032             memcpy(item->value.u.blob.pBlobData, data, count);
1033             break;
1034         }
1035
1036         pos.QuadPart = value;
1037         hr = IStream_Seek(input, pos, SEEK_SET, NULL);
1038         if (FAILED(hr))
1039         {
1040             HeapFree(GetProcessHeap(), 0, item->value.u.blob.pBlobData);
1041             return hr;
1042         }
1043         hr = IStream_Read(input, item->value.u.blob.pBlobData, count, &bytesread);
1044         if (bytesread != count) hr = E_FAIL;
1045         if (hr != S_OK)
1046         {
1047             HeapFree(GetProcessHeap(), 0, item->value.u.blob.pBlobData);
1048             return hr;
1049         }
1050         break;
1051     default:
1052         FIXME("loading field of type %d, count %u is not implemented\n", type, count);
1053         break;
1054     }
1055     return S_OK;
1056 }
1057
1058 static HRESULT LoadIfdMetadata(IStream *input, const GUID *preferred_vendor,
1059     DWORD persist_options, MetadataItem **items, DWORD *item_count)
1060 {
1061     HRESULT hr;
1062     MetadataItem *result;
1063     USHORT count, i;
1064     struct IFD_entry *entry;
1065     BOOL native_byte_order = TRUE;
1066     ULONG bytesread;
1067
1068     TRACE("\n");
1069
1070 #ifdef WORDS_BIGENDIAN
1071     if (persist_options & WICPersistOptionsLittleEndian)
1072 #else
1073     if (persist_options & WICPersistOptionsBigEndian)
1074 #endif
1075         native_byte_order = FALSE;
1076
1077     hr = IStream_Read(input, &count, sizeof(count), &bytesread);
1078     if (bytesread != sizeof(count)) hr = E_FAIL;
1079     if (hr != S_OK) return hr;
1080
1081     SWAP_USHORT(count);
1082
1083     entry = HeapAlloc(GetProcessHeap(), 0, count * sizeof(*entry));
1084     if (!entry) return E_OUTOFMEMORY;
1085
1086     hr = IStream_Read(input, entry, count * sizeof(*entry), &bytesread);
1087     if (bytesread != count * sizeof(*entry)) hr = E_FAIL;
1088     if (hr != S_OK)
1089     {
1090         HeapFree(GetProcessHeap(), 0, entry);
1091         return hr;
1092     }
1093
1094     /* limit number of IFDs to 4096 to avoid infinite loop */
1095     for (i = 0; i < 4096; i++)
1096     {
1097         ULONG next_ifd_offset;
1098         LARGE_INTEGER pos;
1099         USHORT next_ifd_count;
1100
1101         hr = IStream_Read(input, &next_ifd_offset, sizeof(next_ifd_offset), &bytesread);
1102         if (bytesread != sizeof(next_ifd_offset)) hr = E_FAIL;
1103         if (hr != S_OK) break;
1104
1105         SWAP_ULONG(next_ifd_offset);
1106         if (!next_ifd_offset) break;
1107
1108         pos.QuadPart = next_ifd_offset;
1109         hr = IStream_Seek(input, pos, SEEK_SET, NULL);
1110         if (FAILED(hr)) break;
1111
1112         hr = IStream_Read(input, &next_ifd_count, sizeof(next_ifd_count), &bytesread);
1113         if (bytesread != sizeof(next_ifd_count)) hr = E_FAIL;
1114         if (hr != S_OK) break;
1115
1116         SWAP_USHORT(next_ifd_count);
1117
1118         pos.QuadPart = next_ifd_count * sizeof(*entry);
1119         hr = IStream_Seek(input, pos, SEEK_CUR, NULL);
1120         if (FAILED(hr)) break;
1121     }
1122
1123     if (hr != S_OK || i == 4096)
1124     {
1125         HeapFree(GetProcessHeap(), 0, entry);
1126         return WINCODEC_ERR_BADMETADATAHEADER;
1127     }
1128
1129     result = HeapAlloc(GetProcessHeap(), 0, count * sizeof(*result));
1130     if (!result)
1131     {
1132         HeapFree(GetProcessHeap(), 0, entry);
1133         return E_OUTOFMEMORY;
1134     }
1135
1136     for (i = 0; i < count; i++)
1137     {
1138         hr = load_IFD_entry(input, &entry[i], &result[i], native_byte_order);
1139         if (FAILED(hr))
1140         {
1141             HeapFree(GetProcessHeap(), 0, entry);
1142             HeapFree(GetProcessHeap(), 0, result);
1143             return hr;
1144         }
1145     }
1146
1147     HeapFree(GetProcessHeap(), 0, entry);
1148
1149     *items = result;
1150     *item_count = count;
1151
1152     return S_OK;
1153 }
1154
1155 static const MetadataHandlerVtbl IfdMetadataReader_Vtbl = {
1156     0,
1157     &CLSID_WICIfdMetadataReader,
1158     LoadIfdMetadata
1159 };
1160
1161 HRESULT IfdMetadataReader_CreateInstance(REFIID iid, void **ppv)
1162 {
1163     return MetadataReader_Create(&IfdMetadataReader_Vtbl, iid, ppv);
1164 }