static void get_device_data (ofGstDevice &webcam_device, int desired_framerate)
{
string pipeline_desc = webcam_device.gstreamer_src + " name=source device=" +
webcam_device.video_device + " ! fakesink";
GError * err = NULL;
GstElement * pipeline = gst_parse_launch (pipeline_desc.c_str(), &err);
if ((pipeline == NULL) || (err != NULL)){
if (err){
ofLog(OF_LOG_ERROR, "ofGstUtils: error getting device data: %s", err->message);
g_error_free (err);
}else{
ofLog(OF_LOG_ERROR, "ofGstUtils: error getting device data, cannot get pipeline");
}
if(pipeline)
gst_object_unref (pipeline);
return;
}
// TODO: try to lower seconds,
// Start the pipeline and wait for max. 10 seconds for it to start up
gst_element_set_state (pipeline, GST_STATE_PLAYING);
GstStateChangeReturn ret = gst_element_get_state (pipeline, NULL, NULL, 10 * GST_SECOND);
// Check if any error messages were posted on the bus
GstBus * bus = gst_element_get_bus (pipeline);
GstMessage * msg = gst_bus_poll (bus, GST_MESSAGE_ERROR, 0);
gst_object_unref (bus);
if ((msg == NULL) && (ret == GST_STATE_CHANGE_SUCCESS)){
gst_element_set_state (pipeline, GST_STATE_PAUSED);
GstElement *src = gst_bin_get_by_name (GST_BIN (pipeline), "source");
char *name;
g_object_get (G_OBJECT (src), "device-name", &name, (void*)NULL);
ofLog(OF_LOG_VERBOSE, "Device: %s (%s)\n", name==NULL?"":name, webcam_device.video_device.c_str());
GstPad *pad = gst_element_get_pad (src, "src");
GstCaps *caps = gst_pad_get_caps (pad);
gst_object_unref (pad);
get_supported_video_formats (webcam_device, *caps, desired_framerate);
gst_caps_unref (caps);
}else if(msg){
gchar *debug;
gst_message_parse_error(msg, &err, &debug);
ofLog(OF_LOG_ERROR, "ofGstUtils: error getting device data; module %s reported: %s",
gst_element_get_name(GST_MESSAGE_SRC (msg)), err->message);
g_error_free(err);
g_free(debug);
}
gst_element_set_state (pipeline, GST_STATE_NULL);
gst_object_unref (pipeline);
}
static void
get_device_data (ofGstDevice &webcam_device)
{
char *pipeline_desc;
GstElement *pipeline;
GError *err;
GstStateChangeReturn ret;
GstMessage *msg;
GstBus *bus;
{
pipeline_desc = g_strdup_printf ("%s name=source device=%s ! fakesink",
webcam_device.gstreamer_src,
webcam_device.video_device);
err = NULL;
pipeline = gst_parse_launch (pipeline_desc, &err);
if ((pipeline != NULL) && (err == NULL))
{
/* Start the pipeline and wait for max. 10 seconds for it to start up */
gst_element_set_state (pipeline, GST_STATE_PLAYING);
ret = gst_element_get_state (pipeline, NULL, NULL, 10 * GST_SECOND);
/* Check if any error messages were posted on the bus */
bus = gst_element_get_bus (pipeline);
msg = gst_bus_poll (bus, GST_MESSAGE_ERROR, 0);
gst_object_unref (bus);
if ((msg == NULL) && (ret == GST_STATE_CHANGE_SUCCESS))
{
GstElement *src;
GstPad *pad;
char *name;
GstCaps *caps;
gst_element_set_state (pipeline, GST_STATE_PAUSED);
src = gst_bin_get_by_name (GST_BIN (pipeline), "source");
g_object_get (G_OBJECT (src), "device-name", &name, (void*)NULL);
if (name == NULL)
name = "Unknown";
// ofLog(OF_LOG_VERBOSE,"Device: %s (%s)\n", name, webcam_device.video_device);
pad = gst_element_get_pad (src, "src");
caps = gst_pad_get_caps (pad);
gst_object_unref (pad);
get_supported_video_formats (webcam_device, *caps);
gst_caps_unref (caps);
}
gst_element_set_state (pipeline, GST_STATE_NULL);
gst_object_unref (pipeline);
}
if (err)
g_error_free (err);
g_free (pipeline_desc);
}
}
