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;
}
}