static GstCaps *
gst_aravis_get_all_camera_caps (GstAravis *gst_aravis)
{
GstCaps *caps;
gint64 *pixel_formats;
double min_frame_rate, max_frame_rate;
int min_height, min_width;
int max_height, max_width;
unsigned int n_pixel_formats, i;
g_return_val_if_fail (GST_IS_ARAVIS (gst_aravis), NULL);
if (!ARV_IS_CAMERA (gst_aravis->camera))
return NULL;
GST_LOG_OBJECT (gst_aravis, "Get all camera caps");
arv_camera_get_width_bounds (gst_aravis->camera, &min_width, &max_width);
arv_camera_get_height_bounds (gst_aravis->camera, &min_height, &max_height);
pixel_formats = arv_camera_get_available_pixel_formats (gst_aravis->camera, &n_pixel_formats);
arv_camera_get_frame_rate_bounds (gst_aravis->camera, &min_frame_rate, &max_frame_rate);
int min_frame_rate_numerator;
int min_frame_rate_denominator;
gst_util_double_to_fraction (min_frame_rate, &min_frame_rate_numerator, &min_frame_rate_denominator);
int max_frame_rate_numerator;
int max_frame_rate_denominator;
gst_util_double_to_fraction (max_frame_rate, &max_frame_rate_numerator, &max_frame_rate_denominator);
caps = gst_caps_new_empty ();
for (i = 0; i < n_pixel_formats; i++) {
const char *caps_string;
caps_string = arv_pixel_format_to_gst_0_10_caps_string (pixel_formats[i]);
if (caps_string != NULL) {
GstStructure *structure;
structure = gst_structure_from_string (caps_string, NULL);
gst_structure_set (structure,
"width", GST_TYPE_INT_RANGE, min_width, max_width,
"height", GST_TYPE_INT_RANGE, min_height, max_height,
"framerate", GST_TYPE_FRACTION_RANGE,
min_frame_rate_numerator, min_frame_rate_denominator,
max_frame_rate_numerator, max_frame_rate_denominator,
NULL);
gst_caps_append_structure (caps, structure);
}
}
g_free (pixel_formats);
return caps;
}
static void
gst_aravis_fixate_caps (GstPad * pad, GstCaps * caps)
{
GstAravis *gst_aravis = GST_ARAVIS (gst_pad_get_parent_element (pad));
GstStructure *structure;
gint width;
gint height;
double frame_rate;
g_return_if_fail (GST_IS_ARAVIS (gst_aravis));
arv_camera_get_region (gst_aravis->camera, NULL, NULL, &width, &height);
frame_rate = arv_camera_get_frame_rate (gst_aravis->camera);
structure = gst_caps_get_structure (caps, 0);
gst_structure_fixate_field_nearest_int (structure, "width", width);
gst_structure_fixate_field_nearest_int (structure, "height", height);
gst_structure_fixate_field_nearest_fraction (structure, "framerate", (double) (0.5 + frame_rate), 1);
GST_LOG_OBJECT (gst_aravis, "Fixate caps");
g_object_unref (gst_aravis);
}
