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authorStanislaw Halik <sthalik@misaki.pl>2019-05-06 03:52:45 +0200
committerStanislaw Halik <sthalik@misaki.pl>2019-05-06 03:53:01 +0200
commit31bab22b5ee7bc18ad4bdb2fb74ed4948a900cc0 (patch)
tree7532ffae7542002136e94f217fa3596787f0cc0a /compat/camera-names.cpp
parentc246ff0280eda1a8ccdfdfb557037b7cea8ecc63 (diff)
compat/camera-names: move to original location
Issue: #946
Diffstat (limited to 'compat/camera-names.cpp')
-rw-r--r--compat/camera-names.cpp106
1 files changed, 106 insertions, 0 deletions
diff --git a/compat/camera-names.cpp b/compat/camera-names.cpp
new file mode 100644
index 00000000..69926e5a
--- /dev/null
+++ b/compat/camera-names.cpp
@@ -0,0 +1,106 @@
+#include "camera-names.hpp"
+
+#include <algorithm>
+#include <iterator>
+
+#ifdef _WIN32
+# include <cwchar>
+# define NO_DSHOW_STRSAFE
+# include <dshow.h>
+#elif defined(__unix) || defined(__linux) || defined(__APPLE__)
+# include <unistd.h>
+#endif
+
+#ifdef __linux
+# include <fcntl.h>
+# include <sys/ioctl.h>
+# include <linux/videodev2.h>
+# include <cerrno>
+# include <cstring>
+#endif
+
+#include <QDebug>
+
+int camera_name_to_index(const QString &name)
+{
+ auto list = get_camera_names();
+ auto it = std::find(list.cbegin(), list.cend(), name);
+ if (it != list.cend())
+ return std::distance(list.cbegin(), it);
+
+ return -1;
+}
+
+std::vector<QString> get_camera_names()
+{
+ std::vector<QString> ret;
+#ifdef _WIN32
+ // Create the System Device Enumerator.
+ HRESULT hr;
+ CoInitialize(nullptr);
+ ICreateDevEnum *pSysDevEnum = nullptr;
+ hr = CoCreateInstance(CLSID_SystemDeviceEnum, nullptr, CLSCTX_INPROC_SERVER, IID_ICreateDevEnum, (void **)&pSysDevEnum);
+ if (FAILED(hr))
+ {
+ qDebug() << "failed CLSID_SystemDeviceEnum" << hr;
+ return ret;
+ }
+ // Obtain a class enumerator for the video compressor category.
+ IEnumMoniker *pEnumCat = nullptr;
+ hr = pSysDevEnum->CreateClassEnumerator(CLSID_VideoInputDeviceCategory, &pEnumCat, 0);
+
+ if (hr == S_OK) {
+ // Enumerate the monikers.
+ IMoniker *pMoniker = nullptr;
+ ULONG cFetched;
+ while (pEnumCat->Next(1, &pMoniker, &cFetched) == S_OK)
+ {
+ IPropertyBag *pPropBag;
+ hr = pMoniker->BindToStorage(nullptr, nullptr, IID_IPropertyBag, (void **)&pPropBag);
+ if (SUCCEEDED(hr)) {
+ // To retrieve the filter's friendly name, do the following:
+ VARIANT var;
+ VariantInit(&var);
+ hr = pPropBag->Read(L"FriendlyName", &var, nullptr);
+ if (SUCCEEDED(hr))
+ {
+ // Display the name in your UI somehow.
+ QString str((QChar*)var.bstrVal, int(std::wcslen(var.bstrVal)));
+ ret.push_back(str);
+ }
+ VariantClear(&var);
+ pPropBag->Release();
+ }
+ pMoniker->Release();
+ }
+ pEnumCat->Release();
+ }
+ else
+ qDebug() << "failed CLSID_VideoInputDeviceCategory" << hr;
+
+ pSysDevEnum->Release();
+#endif
+
+#ifdef __linux
+ for (int i = 0; i < 16; i++) {
+ char buf[32];
+ snprintf(buf, sizeof(buf), "/dev/video%d", i);
+
+ if (access(buf, R_OK | W_OK) == 0) {
+ int fd = open(buf, O_RDONLY);
+ if (fd == -1)
+ continue;
+ struct v4l2_capability video_cap;
+ if(ioctl(fd, VIDIOC_QUERYCAP, &video_cap) == -1)
+ {
+ qDebug() << "VIDIOC_QUERYCAP" << errno;
+ close(fd);
+ continue;
+ }
+ ret.push_back(QString((const char*)video_cap.card));
+ close(fd);
+ }
+ }
+#endif
+ return ret;
+}