generic-library/opencv
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If a pipeline is specified manually, this has to be done in full now, ending with appsink. For example:

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"uridecodebin uri=file:///path/to/some/video.avi ! ffmpegcolorspace ! appsink"
This commit is contained in:
Nils Hasler 2011-04-24 09:48:19 +00:00
parent 80da1d408b
commit 91d813bc89
1 changed files with 39 additions and 53 deletions
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92
modules/highgui/src/cap_gstreamer.cpp
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@ -329,7 +329,8 @@ bool CvCapture_GStreamer::open( int type, const char* filename )
} }
} else { } else {
GError *err = NULL; GError *err = NULL;
uridecodebin = gst_parse_bin_from_description(filename, FALSE, &err); //uridecodebin = gst_parse_bin_from_description(filename, FALSE, &err);
uridecodebin = gst_parse_launch(filename, &err);
if(!uridecodebin) { if(!uridecodebin) {
CV_WARN("GStreamer: Error opening bin\n"); CV_WARN("GStreamer: Error opening bin\n");
close(); close();
@ -352,58 +353,45 @@ bool CvCapture_GStreamer::open( int type, const char* filename )
close(); close();
return false; return false;
} }
color = gst_element_factory_make("ffmpegcolorspace", NULL);
if(manualpipeline) {
sink = gst_element_factory_make("appsink", NULL); GstIterator *it = gst_bin_iterate_sinks(GST_BIN(uridecodebin));
if(gst_iterator_next(it, (gpointer *)&sink) != GST_ITERATOR_OK) {
CV_ERROR(CV_StsError, "GStreamer: cannot find appsink in manual pipeline\n");
return false;
}
pipeline = uridecodebin;
} else {
pipeline = gst_pipeline_new (NULL);
color = gst_element_factory_make("ffmpegcolorspace", NULL);
sink = gst_element_factory_make("appsink", NULL);
gst_bin_add_many(GST_BIN(pipeline), uridecodebin, color, sink, NULL);
g_signal_connect(uridecodebin, "pad-added", G_CALLBACK(newPad), color);
if(!gst_element_link(color, sink)) {
CV_ERROR(CV_StsError, "GStreamer: cannot link color -> sink\n");
gst_object_unref(pipeline);
return false;
}
}
gst_app_sink_set_max_buffers (GST_APP_SINK(sink), 1); gst_app_sink_set_max_buffers (GST_APP_SINK(sink), 1);
if(stream) gst_app_sink_set_drop (GST_APP_SINK(sink), stream);
gst_app_sink_set_drop (GST_APP_SINK(sink), true);
GstCaps* caps= gst_caps_new_simple("video/x-raw-rgb", GstCaps* caps= gst_caps_new_simple("video/x-raw-rgb",
"red_mask", G_TYPE_INT, 255, "red_mask", G_TYPE_INT, 0x0000FF,
"green_mask", G_TYPE_INT, 65280, "green_mask", G_TYPE_INT, 0x00FF00,
"blue_mask", G_TYPE_INT, 16711680, "blue_mask", G_TYPE_INT, 0xFF0000,
NULL); NULL);
gst_app_sink_set_caps(GST_APP_SINK(sink), caps); gst_app_sink_set_caps(GST_APP_SINK(sink), caps);
gst_caps_unref(caps); gst_caps_unref(caps);
pipeline = gst_pipeline_new (NULL);
if(manualpipeline) {
// it is easier to link elements inside the same bin
gst_bin_add_many(GST_BIN(uridecodebin), color, sink, NULL);
// need the pipeline around the bin because bins don't know about timing
gst_bin_add(GST_BIN(pipeline), uridecodebin);
} else {
gst_bin_add_many(GST_BIN(pipeline), uridecodebin, color, sink, NULL);
}
if(manualpipeline) {
GstElement *e = gst_bin_get_by_name(GST_BIN(uridecodebin), "to-opencv");
if(e) {
if(!gst_element_link(e, color)) {
g_signal_connect(e, "pad-added", G_CALLBACK(newPad), color);
}
gst_object_unref(e);
} else {
CV_WARN("GStreamer: no element with 'name=to-opencv'\n");
gst_object_unref(pipeline);
return false;
}
} else {
g_signal_connect(uridecodebin, "pad-added", G_CALLBACK(newPad), color);
}
if(!gst_element_link(color, sink)) {
CV_ERROR(CV_StsError, "GStreamer: cannot link color -> sink\n");
gst_object_unref(pipeline);
return false;
}
if(gst_element_set_state(GST_ELEMENT(pipeline), GST_STATE_READY) == if(gst_element_set_state(GST_ELEMENT(pipeline), GST_STATE_READY) ==
GST_STATE_CHANGE_FAILURE) { GST_STATE_CHANGE_FAILURE) {
CV_WARN("GStreamer: unable to set pipeline to ready\n"); CV_WARN("GStreamer: unable to set pipeline to ready\n");
// icvHandleMessage(capture);
// cvReleaseCapture((CvCapture **)(void *)&capture);
gst_object_unref(pipeline); gst_object_unref(pipeline);
return false; return false;
} }
@ -411,8 +399,6 @@ bool CvCapture_GStreamer::open( int type, const char* filename )
if(gst_element_set_state(GST_ELEMENT(pipeline), GST_STATE_PLAYING) == if(gst_element_set_state(GST_ELEMENT(pipeline), GST_STATE_PLAYING) ==
GST_STATE_CHANGE_FAILURE) { GST_STATE_CHANGE_FAILURE) {
CV_WARN("GStreamer: unable to set pipeline to playing\n"); CV_WARN("GStreamer: unable to set pipeline to playing\n");
// icvHandleMessage(capture);
// cvReleaseCapture((CvCapture **)(void *)&capture);
gst_object_unref(pipeline); gst_object_unref(pipeline);
return false; return false;
} }
@ -658,10 +644,10 @@ double CvCapture_GStreamer::getProperty( int propId )
case CV_CAP_PROP_CONVERT_RGB: case CV_CAP_PROP_CONVERT_RGB:
break; break;
case CV_CAP_GSTREAMER_QUEUE_LENGTH: case CV_CAP_GSTREAMER_QUEUE_LENGTH:
if(!sink) { if(!sink) {
CV_WARN("GStreamer: there is no sink yet"); CV_WARN("GStreamer: there is no sink yet");
return false; return false;
} }
return gst_app_sink_get_max_buffers(GST_APP_SINK(sink)); return gst_app_sink_get_max_buffers(GST_APP_SINK(sink));
default: default:
CV_WARN("GStreamer: unhandled property"); CV_WARN("GStreamer: unhandled property");
@ -744,9 +730,9 @@ bool CvCapture_GStreamer::setProperty( int propId, double value )
break; break;
case CV_CAP_GSTREAMER_QUEUE_LENGTH: case CV_CAP_GSTREAMER_QUEUE_LENGTH:
if(!sink) if(!sink)
break; break;
gst_app_sink_set_max_buffers(GST_APP_SINK(sink), (guint) value); gst_app_sink_set_max_buffers(GST_APP_SINK(sink), (guint) value);
break; break;
default: default:
CV_WARN("GStreamer: unhandled property"); CV_WARN("GStreamer: unhandled property");
} }