static IWICBitmapDecoder *find_decoder(IStream *pIStream, const GUID *pguidVendor, WICDecodeOptions metadataOptions) { IEnumUnknown *enumdecoders; IUnknown *unkdecoderinfo; IWICBitmapDecoderInfo *decoderinfo; IWICBitmapDecoder *decoder = NULL; GUID vendor; HRESULT res; ULONG num_fetched; BOOL matches; res = CreateComponentEnumerator(WICDecoder, WICComponentEnumerateDefault, &enumdecoders); if (FAILED(res)) return NULL; while (!decoder) { res = IEnumUnknown_Next(enumdecoders, 1, &unkdecoderinfo, &num_fetched); if (res == S_OK) { res = IUnknown_QueryInterface(unkdecoderinfo, &IID_IWICBitmapDecoderInfo, (void**)&decoderinfo); if (SUCCEEDED(res)) { if (pguidVendor) { res = IWICBitmapDecoderInfo_GetVendorGUID(decoderinfo, &vendor); if (FAILED(res) || !IsEqualIID(&vendor, pguidVendor)) { IWICBitmapDecoderInfo_Release(decoderinfo); IUnknown_Release(unkdecoderinfo); continue; } } res = IWICBitmapDecoderInfo_MatchesPattern(decoderinfo, pIStream, &matches); if (SUCCEEDED(res) && matches) { res = IWICBitmapDecoderInfo_CreateInstance(decoderinfo, &decoder); /* FIXME: should use QueryCapability to choose a decoder */ if (SUCCEEDED(res)) { res = IWICBitmapDecoder_Initialize(decoder, pIStream, metadataOptions); if (FAILED(res)) { IWICBitmapDecoder_Release(decoder); decoder = NULL; } } } IWICBitmapDecoderInfo_Release(decoderinfo); } IUnknown_Release(unkdecoderinfo); } else break; } IEnumUnknown_Release(enumdecoders); return decoder; }
static HRESULT WINAPI ComponentFactory_CreateDecoder(IWICComponentFactory *iface, REFGUID guidContainerFormat, const GUID *pguidVendor, IWICBitmapDecoder **ppIDecoder) { IEnumUnknown *enumdecoders; IUnknown *unkdecoderinfo; IWICBitmapDecoderInfo *decoderinfo; IWICBitmapDecoder *decoder = NULL, *preferred_decoder = NULL; GUID vendor; HRESULT res; ULONG num_fetched; TRACE("(%p,%s,%s,%p)\n", iface, debugstr_guid(guidContainerFormat), debugstr_guid(pguidVendor), ppIDecoder); if (!guidContainerFormat || !ppIDecoder) return E_INVALIDARG; res = CreateComponentEnumerator(WICDecoder, WICComponentEnumerateDefault, &enumdecoders); if (FAILED(res)) return res; while (!preferred_decoder) { res = IEnumUnknown_Next(enumdecoders, 1, &unkdecoderinfo, &num_fetched); if (res != S_OK) break; res = IUnknown_QueryInterface(unkdecoderinfo, &IID_IWICBitmapDecoderInfo, (void **)&decoderinfo); if (SUCCEEDED(res)) { GUID container_guid; res = IWICBitmapDecoderInfo_GetContainerFormat(decoderinfo, &container_guid); if (SUCCEEDED(res) && IsEqualIID(&container_guid, guidContainerFormat)) { IWICBitmapDecoder *new_decoder; res = IWICBitmapDecoderInfo_CreateInstance(decoderinfo, &new_decoder); if (SUCCEEDED(res)) { if (pguidVendor) { res = IWICBitmapDecoderInfo_GetVendorGUID(decoderinfo, &vendor); if (SUCCEEDED(res) && IsEqualIID(&vendor, pguidVendor)) { preferred_decoder = new_decoder; new_decoder = NULL; } } if (new_decoder && !decoder) { decoder = new_decoder; new_decoder = NULL; } if (new_decoder) IWICBitmapDecoder_Release(new_decoder); } } IWICBitmapDecoderInfo_Release(decoderinfo); } IUnknown_Release(unkdecoderinfo); } IEnumUnknown_Release(enumdecoders); if (preferred_decoder) { *ppIDecoder = preferred_decoder; if (decoder) IWICBitmapDecoder_Release(decoder); return S_OK; } if (decoder) { *ppIDecoder = decoder; return S_OK; } *ppIDecoder = NULL; return WINCODEC_ERR_COMPONENTNOTFOUND; }
static HRESULT WINAPI ImagingFactory_CreateDecoderFromStream( IWICImagingFactory *iface, IStream *pIStream, const GUID *pguidVendor, WICDecodeOptions metadataOptions, IWICBitmapDecoder **ppIDecoder) { static int fixme=0; IEnumUnknown *enumdecoders; IUnknown *unkdecoderinfo; IWICBitmapDecoderInfo *decoderinfo; IWICBitmapDecoder *decoder=NULL; HRESULT res=S_OK; ULONG num_fetched; BOOL matches; TRACE("(%p,%p,%s,%u,%p)\n", iface, pIStream, debugstr_guid(pguidVendor), metadataOptions, ppIDecoder); if (pguidVendor && !fixme++) FIXME("ignoring vendor GUID\n"); res = CreateComponentEnumerator(WICDecoder, WICComponentEnumerateDefault, &enumdecoders); if (FAILED(res)) return res; while (!decoder) { res = IEnumUnknown_Next(enumdecoders, 1, &unkdecoderinfo, &num_fetched); if (res == S_OK) { res = IUnknown_QueryInterface(unkdecoderinfo, &IID_IWICBitmapDecoderInfo, (void**)&decoderinfo); if (SUCCEEDED(res)) { res = IWICBitmapDecoderInfo_MatchesPattern(decoderinfo, pIStream, &matches); if (SUCCEEDED(res) && matches) { res = IWICBitmapDecoderInfo_CreateInstance(decoderinfo, &decoder); /* FIXME: should use QueryCapability to choose a decoder */ if (SUCCEEDED(res)) { res = IWICBitmapDecoder_Initialize(decoder, pIStream, metadataOptions); if (FAILED(res)) { IWICBitmapDecoder_Release(decoder); decoder = NULL; } } } IWICBitmapDecoderInfo_Release(decoderinfo); } IUnknown_Release(unkdecoderinfo); } else break; } IEnumUnknown_Release(enumdecoders); if (decoder) { *ppIDecoder = decoder; return S_OK; } else { if (WARN_ON(wincodecs)) { LARGE_INTEGER seek; BYTE data[4]; ULONG bytesread; WARN("failed to load from a stream\n"); seek.QuadPart = 0; res = IStream_Seek(pIStream, seek, STREAM_SEEK_SET, NULL); if (SUCCEEDED(res)) res = IStream_Read(pIStream, data, 4, &bytesread); if (SUCCEEDED(res)) WARN("first %i bytes of stream=%x %x %x %x\n", bytesread, data[0], data[1], data[2], data[3]); } *ppIDecoder = NULL; return WINCODEC_ERR_COMPONENTNOTFOUND; } }