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Added option to open Aravis camera by name.

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This commit is contained in:
Alexander Smorkalov
2026-08-25 15:30:41 +03:00
parent 44e7b4eb11
commit 69f42526bb
3 changed files with 74 additions and 32 deletions
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103
modules/videoio/src/cap_aravis.cpp
View File

@@ -105,6 +105,8 @@ public:
}
bool open(int);
bool open(const std::string&);
void configure();
void close();
double getProperty(int) const CV_OVERRIDE;
bool setProperty(int, double) CV_OVERRIDE;
@@ -118,6 +120,7 @@ public:
protected:
bool create(int);
bool create(const std::string&);
bool init_buffers();
void stopCapture();
@@ -226,6 +229,21 @@ bool CvCaptureCAM_Aravis::create( int index )
return NULL != (camera = arv_camera_new(deviceName.c_str(), NULL));
}
bool CvCaptureCAM_Aravis::create( const std::string &deviceName )
{
GError *error = NULL;
// NULL name asks Aravis for the first device found
camera = arv_camera_new(deviceName.empty() ? NULL : deviceName.c_str(), &error);
if(error) {
CV_LOG_WARNING(NULL, cv::format("Aravis: failed to open camera '%s': %s",
deviceName.c_str(), error->message));
g_clear_error(&error);
}
return camera != NULL;
}
bool CvCaptureCAM_Aravis::init_buffers()
{
if(stream) {
@@ -254,41 +272,54 @@ bool CvCaptureCAM_Aravis::init_buffers()
return false;
}
void CvCaptureCAM_Aravis::configure()
{
// fetch properties bounds
arv_camera_get_width_bounds(camera, &widthMin, &widthMax, NULL);
arv_camera_get_height_bounds(camera, &heightMin, &heightMax, NULL);
arv_camera_set_region(camera, 0, 0, widthMax, heightMax, NULL);
if( (fpsAvailable = arv_camera_is_frame_rate_available(camera, NULL)) )
arv_camera_get_frame_rate_bounds(camera, &fpsMin, &fpsMax, NULL);
if( (gainAvailable = arv_camera_is_gain_available(camera, NULL)) )
arv_camera_get_gain_bounds (camera, &gainMin, &gainMax, NULL);
if( (exposureAvailable = arv_camera_is_exposure_time_available(camera, NULL)) )
arv_camera_get_exposure_time_bounds (camera, &exposureMin, &exposureMax, NULL);
// get initial values
pixelFormat = arv_camera_get_pixel_format(camera, NULL);
// If camera's pixel format is not one of the supported formats, set a default
if (pixelFormat != ARV_PIXEL_FORMAT_MONO_8 &&
pixelFormat != ARV_PIXEL_FORMAT_BAYER_GR_8 &&
pixelFormat != ARV_PIXEL_FORMAT_MONO_12 &&
pixelFormat != ARV_PIXEL_FORMAT_MONO_16) {
pixelFormat = ARV_PIXEL_FORMAT_MONO_8;
arv_camera_set_pixel_format(camera, pixelFormat, NULL);
CV_LOG_WARNING(NULL, "Current camera pixel format is not supported. Failed back to MONO_8.");
}
midGrey = getExpectedMidGrey(pixelFormat);
exposure = exposureAvailable ? arv_camera_get_exposure_time(camera, NULL) : 0;
gain = gainAvailable ? arv_camera_get_gain(camera, NULL) : 0;
fps = arv_camera_get_frame_rate(camera, NULL);
softwareTriggered = (strcmp(arv_camera_get_trigger_source(camera, NULL), "Software") == 0);
}
bool CvCaptureCAM_Aravis::open( int index )
{
if(create(index)) {
// fetch properties bounds
arv_camera_get_width_bounds(camera, &widthMin, &widthMax, NULL);
arv_camera_get_height_bounds(camera, &heightMin, &heightMax, NULL);
arv_camera_set_region(camera, 0, 0, widthMax, heightMax, NULL);
if( (fpsAvailable = arv_camera_is_frame_rate_available(camera, NULL)) )
arv_camera_get_frame_rate_bounds(camera, &fpsMin, &fpsMax, NULL);
if( (gainAvailable = arv_camera_is_gain_available(camera, NULL)) )
arv_camera_get_gain_bounds (camera, &gainMin, &gainMax, NULL);
if( (exposureAvailable = arv_camera_is_exposure_time_available(camera, NULL)) )
arv_camera_get_exposure_time_bounds (camera, &exposureMin, &exposureMax, NULL);
// get initial values
pixelFormat = arv_camera_get_pixel_format(camera, NULL);
// If camera's pixel format is not one of the supported formats, set a default
if (pixelFormat != ARV_PIXEL_FORMAT_MONO_8 &&
pixelFormat != ARV_PIXEL_FORMAT_BAYER_GR_8 &&
pixelFormat != ARV_PIXEL_FORMAT_MONO_12 &&
pixelFormat != ARV_PIXEL_FORMAT_MONO_16) {
pixelFormat = ARV_PIXEL_FORMAT_MONO_8;
arv_camera_set_pixel_format(camera, pixelFormat, NULL);
CV_LOG_WARNING(NULL, "Current camera pixel format is not supported. Failed back to MONO_8.");
}
midGrey = getExpectedMidGrey(pixelFormat);
exposure = exposureAvailable ? arv_camera_get_exposure_time(camera, NULL) : 0;
gain = gainAvailable ? arv_camera_get_gain(camera, NULL) : 0;
fps = arv_camera_get_frame_rate(camera, NULL);
softwareTriggered = (strcmp(arv_camera_get_trigger_source(camera, NULL), "Software") == 0);
configure();
return startCapture();
}
return false;
}
bool CvCaptureCAM_Aravis::open( const std::string& deviceName)
{
if(create(deviceName)) {
configure();
return startCapture();
}
return false;
@@ -644,4 +675,14 @@ cv::Ptr<cv::IVideoCapture> cv::create_Aravis_capture( int index )
}
return NULL;
}
cv::Ptr<cv::IVideoCapture> cv::create_Aravis_capture_by_name( const std::string &deviceName )
{
Ptr<CvCaptureCAM_Aravis> capture = makePtr<CvCaptureCAM_Aravis>();
if(capture->open(deviceName)) {
return capture;
}
return NULL;
}
#endif

1
modules/videoio/src/cap_interface.hpp
View File

@@ -384,6 +384,7 @@ Ptr<IVideoCapture> create_XIMEA_capture_file( const std::string &serialNumber );
Ptr<IVideoCapture> create_ueye_camera(int camera);
Ptr<IVideoCapture> create_Aravis_capture( int index );
Ptr<IVideoCapture> create_Aravis_capture_by_name( const std::string &deviceName );
Ptr<IVideoCapture> createMotionJpegCapture(const std::string& filename);
Ptr<IVideoWriter> createMotionJpegWriter(const std::string& filename, int fourcc,

2
modules/videoio/src/videoio_registry.cpp
View File

@@ -144,7 +144,7 @@ static const struct VideoBackendInfo builtin_backends[] =
DECLARE_STATIC_BACKEND(CAP_XIAPI, "XIMEA", MODE_CAPTURE_ALL, create_XIMEA_capture_file, create_XIMEA_capture_cam, 0)
#endif
#ifdef HAVE_ARAVIS_API
DECLARE_STATIC_BACKEND(CAP_ARAVIS, "ARAVIS", MODE_CAPTURE_BY_INDEX, 0, create_Aravis_capture, 0)
DECLARE_STATIC_BACKEND(CAP_ARAVIS, "ARAVIS", MODE_CAPTURE_ALL, cv::create_Aravis_capture_by_name, create_Aravis_capture, 0)
#endif
#ifdef HAVE_UEYE // uEye