windowscodecs: Implement MetadataHandler_GetValue.

dlls/windowscodecs/metadatahandler.c

@@ -213,11 +213,84 @@ static HRESULT WINAPI MetadataHandler_GetValueByIndex(IWICMetadataWriter *iface,
     return hr;
 }
 
+static BOOL get_int_value(const PROPVARIANT *pv, LONGLONG *value)
+{
+    switch (pv->vt)
+    {
+    case VT_NULL:
+    case VT_EMPTY:
+        *value = 0;
+        break;
+    case VT_I1:
+        *value = pv->u.cVal;
+        break;
+    case VT_UI1:
+        *value = pv->u.bVal;
+        break;
+    case VT_I2:
+        *value = pv->u.iVal;
+        break;
+    case VT_UI2:
+        *value = pv->u.uiVal;
+        break;
+    case VT_I4:
+        *value = pv->u.lVal;
+        break;
+    case VT_UI4:
+        *value = pv->u.ulVal;
+        break;
+    case VT_I8:
+    case VT_UI8:
+        *value = pv->u.hVal.QuadPart;
+        break;
+    default:
+        FIXME("not supported variant type %d\n", pv->vt);
+        return FALSE;
+    }
+    return TRUE;
+}
+
+/* FiXME: Use propsys.PropVariantCompareEx once it's implemented */
+static int propvar_cmp(const PROPVARIANT *v1, const PROPVARIANT *v2)
+{
+    LONGLONG value1, value2;
+
+    if (!get_int_value(v1, &value1)) return -1;
+    if (!get_int_value(v2, &value2)) return -1;
+
+    value1 -= value2;
+    if (value1) return value1 < 0 ? -1 : 1;
+    return 0;
+}
+
 static HRESULT WINAPI MetadataHandler_GetValue(IWICMetadataWriter *iface,
-    const PROPVARIANT *pvarSchema, const PROPVARIANT *pvarId, PROPVARIANT *pvarValue)
+    const PROPVARIANT *schema, const PROPVARIANT *id, PROPVARIANT *value)
 {
-    FIXME("(%p,%p,%p,%p): stub\n", iface, pvarSchema, pvarId, pvarValue);
-    return E_NOTIMPL;
+    UINT i;
+    HRESULT hr = WINCODEC_ERR_PROPERTYNOTFOUND;
+    MetadataHandler *This = impl_from_IWICMetadataWriter(iface);
+
+    TRACE("(%p,%p,%p,%p)\n", iface, schema, id, value);
+
+    if (!id) return E_INVALIDARG;
+
+    EnterCriticalSection(&This->lock);
+
+    for (i = 0; i < This->item_count; i++)
+    {
+        if (schema && This->items[i].schema.vt != VT_EMPTY)
+        {
+            if (propvar_cmp(schema, &This->items[i].schema) != 0) continue;
+        }
+
+        if (propvar_cmp(id, &This->items[i].id) != 0) continue;
+
+        hr = value ? PropVariantCopy(value, &This->items[i].value) : S_OK;
+        break;
+    }
+
+    LeaveCriticalSection(&This->lock);
+    return hr;
 }
 
 static HRESULT WINAPI MetadataHandler_GetEnumerator(IWICMetadataWriter *iface,

dlls/windowscodecs/tests/metadata.c

@@ -726,7 +726,46 @@ static void test_metadata_IFD(void)
     PropVariantClear(&value);
 
     hr = IWICMetadataReader_GetValueByIndex(reader, count, &schema, NULL, NULL);
-    ok(hr == E_INVALIDARG, "GetValueByIndex should fail\n");
+    ok(hr == E_INVALIDARG, "expected E_INVALIDARG, got %#x\n", hr);
+
+    PropVariantInit(&schema);
+    PropVariantInit(&id);
+    PropVariantInit(&value);
+
+    hr = IWICMetadataReader_GetValue(reader, &schema, &id, &value);
+    ok(hr == WINCODEC_ERR_PROPERTYNOTFOUND, "expected WINCODEC_ERR_PROPERTYNOTFOUND, got %#x\n", hr);
+
+    hr = IWICMetadataReader_GetValue(reader, NULL, &id, NULL);
+    ok(hr == WINCODEC_ERR_PROPERTYNOTFOUND, "expected WINCODEC_ERR_PROPERTYNOTFOUND, got %#x\n", hr);
+
+    hr = IWICMetadataReader_GetValue(reader, &schema, NULL, NULL);
+    ok(hr == E_INVALIDARG, "expected E_INVALIDARG, got %#x\n", hr);
+
+    hr = IWICMetadataReader_GetValue(reader, &schema, &id, NULL);
+    ok(hr == WINCODEC_ERR_PROPERTYNOTFOUND, "expected WINCODEC_ERR_PROPERTYNOTFOUND, got %#x\n", hr);
+
+    hr = IWICMetadataReader_GetValue(reader, &schema, NULL, &value);
+    ok(hr == E_INVALIDARG, "expected E_INVALIDARG, got %#x\n", hr);
+
+    id.vt = VT_UI2;
+    U(id).uiVal = 0xf00e;
+    hr = IWICMetadataReader_GetValue(reader, NULL, &id, NULL);
+    ok(hr == S_OK, "GetValue error %#x\n", hr);
+
+    /* schema is ignored by Ifd metadata reader */
+    schema.vt = VT_UI4;
+    U(schema).ulVal = 0xdeadbeef;
+    hr = IWICMetadataReader_GetValue(reader, &schema, &id, &value);
+    ok(hr == S_OK, "GetValue error %#x\n", hr);
+    ok(value.vt == VT_LPSTR, "unexpected vt: %i\n", id.vt);
+    ok(!strcmp(U(value).pszVal, "Hello World!"), "unexpected value: %s\n", U(value).pszVal);
+    PropVariantClear(&value);
+
+    hr = IWICMetadataReader_GetValue(reader, NULL, &id, &value);
+    ok(hr == S_OK, "GetValue error %#x\n", hr);
+    ok(value.vt == VT_LPSTR, "unexpected vt: %i\n", id.vt);
+    ok(!strcmp(U(value).pszVal, "Hello World!"), "unexpected value: %s\n", U(value).pszVal);
+    PropVariantClear(&value);
 
     hr = IWICMetadataReader_QueryInterface(reader, &IID_IWICMetadataBlockReader, (void**)&blockreader);
     ok(hr == E_NOINTERFACE, "QueryInterface failed, hr=%x\n", hr);