1 files changed, 154 insertions, 0 deletions
diff --git a/src/detection/camera/camera_windows.cpp b/src/detection/camera/camera_windows.cpp
new file mode 100644
index 0000000..1f42306
--- /dev/null
+++ b/src/detection/camera/camera_windows.cpp
@@ -0,0 +1,154 @@
+extern "C" {
+#include "camera.h"
+#include "common/library.h"
+#include "common/windows/com.h"
+}
+#include "common/windows/unicode.hpp"
+#include "common/windows/util.hpp"
+
+#include <initguid.h>
+#include <mfapi.h>
+#include <mfidl.h>
+
+extern "C" const char* ffDetectCamera(FF_A_UNUSED FFlist* result) {
+    FF_LIBRARY_LOAD_MESSAGE(mfplat, "mfplat" FF_LIBRARY_EXTENSION, 1)
+    FF_LIBRARY_LOAD_SYMBOL_MESSAGE(mfplat, MFCreateAttributes)
+    FF_LIBRARY_LOAD_MESSAGE(mf, "mf" FF_LIBRARY_EXTENSION, 1)
+    FF_LIBRARY_LOAD_SYMBOL_MESSAGE(mf, MFEnumDeviceSources)
+
+    const char* error = ffInitCom();
+    if (error) {
+        return error;
+    }
+
+    IMFAttributes* FF_AUTO_RELEASE_COM_OBJECT attrs = nullptr;
+    if (FAILED(ffMFCreateAttributes(&attrs, 1))) {
+        return "MFCreateAttributes() failed";
+    }
+
+    if (FAILED(attrs->SetGUID(
+            MF_DEVSOURCE_ATTRIBUTE_SOURCE_TYPE,
+            MF_DEVSOURCE_ATTRIBUTE_SOURCE_TYPE_VIDCAP_GUID))) {
+        return "SetGUID(MF_*) failed";
+    }
+
+    IMFActivate** devices = NULL;
+    uint32_t count;
+
+    if (FAILED(ffMFEnumDeviceSources(attrs, &devices, &count))) {
+        return "MFEnumDeviceSources() failed";
+    }
+
+    for (uint32_t i = 0; i < count; i++) {
+        IMFActivate* FF_AUTO_RELEASE_COM_OBJECT device = devices[i];
+
+        wchar_t buffer[256];
+        uint32_t length = 0;
+        if (FAILED(device->GetString(MF_DEVSOURCE_ATTRIBUTE_FRIENDLY_NAME, buffer, ARRAY_SIZE(buffer), &length)) || length == 0) {
+            continue;
+        }
+
+        FFCameraResult* camera = FF_LIST_ADD(FFCameraResult, *result);
+        ffStrbufInitNWS(&camera->name, length, buffer);
+        ffStrbufInit(&camera->colorspace);
+        ffStrbufInit(&camera->vendor);
+        ffStrbufInit(&camera->id);
+        camera->width = 0;
+        camera->height = 0;
+
+        if (SUCCEEDED(device->GetString(MF_DEVSOURCE_ATTRIBUTE_SOURCE_TYPE_VIDCAP_SYMBOLIC_LINK, buffer, ARRAY_SIZE(buffer), &length)) && length > 0) {
+            ffStrbufSetNWS(&camera->id, length, buffer);
+        }
+
+        IMFMediaSource* FF_AUTO_RELEASE_COM_OBJECT source = nullptr;
+        if (FAILED(device->ActivateObject(IID_PPV_ARGS(&source)))) {
+            continue;
+        }
+
+        on_scope_exit destroySource([&] { source->Shutdown(); });
+
+        IMFPresentationDescriptor* FF_AUTO_RELEASE_COM_OBJECT pd = nullptr;
+        if (FAILED(source->CreatePresentationDescriptor(&pd))) {
+            continue;
+        }
+
+        IMFStreamDescriptor* FF_AUTO_RELEASE_COM_OBJECT sd = nullptr;
+        BOOL selected;
+        if (FAILED(pd->GetStreamDescriptorByIndex(0, &selected, &sd))) {
+            continue;
+        }
+
+        IMFMediaTypeHandler* FF_AUTO_RELEASE_COM_OBJECT handler = nullptr;
+        if (FAILED(sd->GetMediaTypeHandler(&handler))) {
+            continue;
+        }
+
+        DWORD mediaTypeCount;
+        if (FAILED(handler->GetMediaTypeCount(&mediaTypeCount))) {
+            continue;
+        }
+
+        // Assume first type is the maximum resolution
+        IMFMediaType* type = NULL;
+        for (DWORD idx = 0; SUCCEEDED(handler->GetMediaTypeByIndex(idx, &type)); ++idx) {
+            on_scope_exit destroyType([=] { type->Release(); });
+
+            GUID majorType;
+            if (FAILED(type->GetMajorType(&majorType)) || majorType != MFMediaType_Video) {
+                continue;
+            }
+
+            MFVideoPrimaries primaries;
+            static_assert(sizeof(primaries) == sizeof(uint32_t), "");
+            if (SUCCEEDED(type->GetUINT32(MF_MT_VIDEO_PRIMARIES, (uint32_t*) &primaries))) {
+                switch (primaries) {
+                    case MFVideoPrimaries_BT709:
+                        ffStrbufSetStatic(&camera->colorspace, "sRGB");
+                        break;
+                    case MFVideoPrimaries_BT470_2_SysM:
+                    case MFVideoPrimaries_BT470_2_SysBG:
+                        ffStrbufSetStatic(&camera->colorspace, "NTSC");
+                        break;
+                    case MFVideoPrimaries_SMPTE170M:
+                        ffStrbufSetStatic(&camera->colorspace, "SMPTE 170M");
+                        break;
+                    case MFVideoPrimaries_SMPTE240M:
+                        ffStrbufSetStatic(&camera->colorspace, "SMPTE 240M");
+                        break;
+                    case MFVideoPrimaries_EBU3213:
+                        ffStrbufSetStatic(&camera->colorspace, "EBU 3213");
+                        break;
+                    case MFVideoPrimaries_SMPTE_C:
+                        ffStrbufSetStatic(&camera->colorspace, "SMPTE C");
+                        break;
+                    case MFVideoPrimaries_BT2020:
+                        ffStrbufSetStatic(&camera->colorspace, "BT.2020");
+                        break;
+                    case MFVideoPrimaries_XYZ:
+                        ffStrbufSetStatic(&camera->colorspace, "XYZ");
+                        break;
+                    case MFVideoPrimaries_DCI_P3:
+                        ffStrbufSetStatic(&camera->colorspace, "DCI-P3");
+                        break;
+                    case MFVideoPrimaries_ACES:
+                        ffStrbufSetStatic(&camera->colorspace, "ACES");
+                        break;
+                    case (MFVideoPrimaries) 13: // MFVideoPrimaries_Display_P3
+                        ffStrbufSetStatic(&camera->colorspace, "Display P3");
+                        break;
+                    default:
+                        break;
+                }
+            }
+
+            MFGetAttributeSize(type, MF_MT_FRAME_SIZE, &camera->width, &camera->height);
+            break;
+        }
+    }
+
+    if (devices) {
+        CoTaskMemFree(devices);
+    }
+
+    return nullptr;
+}