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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;
}
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