gpointer data);
GstElement* pipeline;
GstElement* uridecodebin;
+ GstElement* v4l2src;
GstElement* color;
GstElement* sink;
#if GST_VERSION_MAJOR > 0
{
pipeline = NULL;
uridecodebin = NULL;
+ v4l2src = NULL;
color = NULL;
sink = NULL;
#if GST_VERSION_MAJOR > 0
if (strstr(name, "opencvsink") != NULL || strstr(name, "appsink") != NULL)
{
sink = GST_ELEMENT ( gst_object_ref (element) );
- done = sink && color;
}
else if (strstr(name, COLOR_ELEM_NAME) != NULL)
{
color = GST_ELEMENT ( gst_object_ref (element) );
- done = sink && color;
+ }
+ else if (strstr(name, "v4l") != NULL)
+ {
+ v4l2src = GST_ELEMENT ( gst_object_ref (element) );
}
g_free(name);
+
+ done = sink && color && v4l2src;
}
#if GST_VERSION_MAJOR > 0
g_value_unset (&value);
if(!pipeline) {
CV_WARN("GStreamer: no pipeline");
- return false;
+ return 0;
}
switch(propId) {
status = gst_element_query_position(sink, FORMAT, &value);
if(!status) {
CV_WARN("GStreamer: unable to query position of stream");
- return false;
+ return 0;
}
return value * 1e-6; // nano seconds to milli seconds
case CV_CAP_PROP_POS_FRAMES:
status = gst_element_query_position(sink, FORMAT, &value);
if(!status) {
CV_WARN("GStreamer: unable to query position of stream");
- return false;
+ return 0;
}
return value;
case CV_CAP_PROP_POS_AVI_RATIO:
status = gst_element_query_position(sink, FORMAT, &value);
if(!status) {
CV_WARN("GStreamer: unable to query position of stream");
- return false;
+ return 0;
}
return ((double) value) / GST_FORMAT_PERCENT_MAX;
case CV_CAP_PROP_FRAME_WIDTH:
case CV_CAP_PROP_CONTRAST:
case CV_CAP_PROP_SATURATION:
case CV_CAP_PROP_HUE:
+ if (v4l2src)
+ {
+ const gchar * propName =
+ propId == CV_CAP_PROP_BRIGHTNESS ? "brightness" :
+ propId == CV_CAP_PROP_CONTRAST ? "contrast" :
+ propId == CV_CAP_PROP_SATURATION ? "saturation" :
+ propId == CV_CAP_PROP_HUE ? "hue" : NULL;
+
+ if (propName)
+ {
+ gint32 value32 = 0;
+ g_object_get(G_OBJECT(v4l2src), propName, &value32, NULL);
+ return value32;
+ }
+ }
case CV_CAP_PROP_GAIN:
case CV_CAP_PROP_CONVERT_RGB:
break;
#undef FORMAT
- return false;
+ return 0;
}
/*!
case CV_CAP_PROP_CONTRAST:
case CV_CAP_PROP_SATURATION:
case CV_CAP_PROP_HUE:
+ if (v4l2src)
+ {
+ const gchar * propName =
+ propId == CV_CAP_PROP_BRIGHTNESS ? "brightness" :
+ propId == CV_CAP_PROP_CONTRAST ? "contrast" :
+ propId == CV_CAP_PROP_SATURATION ? "saturation" :
+ propId == CV_CAP_PROP_HUE ? "hue" : NULL;
+
+ if (propName)
+ {
+ gint32 value32 = cv::saturate_cast<gint32>(value);
+ g_object_set(G_OBJECT(v4l2src), propName, &value32, NULL);
+ return true;
+ }
+ }
case CV_CAP_PROP_GAIN:
case CV_CAP_PROP_CONVERT_RGB:
break;