3 * Copyright (C) 2015 Matthew Waters <matthew@centricular.com>
5 * This library is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU Library General Public
7 * License as published by the Free Software Foundation; either
8 * version 2 of the License, or (at your option) any later version.
10 * This library is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * Library General Public License for more details.
15 * You should have received a copy of the GNU Library General Public
16 * License along with this library; if not, write to the
17 * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
18 * Boston, MA 02110-1301, USA.
23 * @title: GstGtkBaseSink
31 #include "gstgtkbasesink.h"
32 #include "gstgtkutils.h"
34 GST_DEBUG_CATEGORY (gst_debug_gtk_base_sink);
35 #define GST_CAT_DEFAULT gst_debug_gtk_base_sink
37 #define DEFAULT_FORCE_ASPECT_RATIO TRUE
38 #define DEFAULT_PAR_N 0
39 #define DEFAULT_PAR_D 1
40 #define DEFAULT_IGNORE_ALPHA TRUE
42 static void gst_gtk_base_sink_finalize (GObject * object);
43 static void gst_gtk_base_sink_set_property (GObject * object, guint prop_id,
44 const GValue * value, GParamSpec * param_spec);
45 static void gst_gtk_base_sink_get_property (GObject * object, guint prop_id,
46 GValue * value, GParamSpec * param_spec);
48 static gboolean gst_gtk_base_sink_start (GstBaseSink * bsink);
49 static gboolean gst_gtk_base_sink_stop (GstBaseSink * bsink);
51 static GstStateChangeReturn
52 gst_gtk_base_sink_change_state (GstElement * element,
53 GstStateChange transition);
55 static void gst_gtk_base_sink_get_times (GstBaseSink * bsink, GstBuffer * buf,
56 GstClockTime * start, GstClockTime * end);
57 static gboolean gst_gtk_base_sink_set_caps (GstBaseSink * bsink,
59 static GstFlowReturn gst_gtk_base_sink_show_frame (GstVideoSink * bsink,
63 gst_gtk_base_sink_navigation_interface_init (GstNavigationInterface * iface);
69 PROP_FORCE_ASPECT_RATIO,
70 PROP_PIXEL_ASPECT_RATIO,
74 #define gst_gtk_base_sink_parent_class parent_class
75 G_DEFINE_ABSTRACT_TYPE_WITH_CODE (GstGtkBaseSink, gst_gtk_base_sink,
77 G_IMPLEMENT_INTERFACE (GST_TYPE_NAVIGATION,
78 gst_gtk_base_sink_navigation_interface_init);
79 GST_DEBUG_CATEGORY_INIT (gst_debug_gtk_base_sink,
80 "gtkbasesink", 0, "Gtk Video Sink base class"));
84 gst_gtk_base_sink_class_init (GstGtkBaseSinkClass * klass)
86 GObjectClass *gobject_class;
87 GstElementClass *gstelement_class;
88 GstBaseSinkClass *gstbasesink_class;
89 GstVideoSinkClass *gstvideosink_class;
91 gobject_class = (GObjectClass *) klass;
92 gstelement_class = (GstElementClass *) klass;
93 gstbasesink_class = (GstBaseSinkClass *) klass;
94 gstvideosink_class = (GstVideoSinkClass *) klass;
96 gobject_class->set_property = gst_gtk_base_sink_set_property;
97 gobject_class->get_property = gst_gtk_base_sink_get_property;
99 g_object_class_install_property (gobject_class, PROP_WIDGET,
100 g_param_spec_object ("widget", "Gtk Widget",
101 "The GtkWidget to place in the widget hierarchy "
102 "(must only be get from the GTK main thread)",
103 GTK_TYPE_WIDGET, G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
105 g_object_class_install_property (gobject_class, PROP_FORCE_ASPECT_RATIO,
106 g_param_spec_boolean ("force-aspect-ratio",
107 "Force aspect ratio",
108 "When enabled, scaling will respect original aspect ratio",
109 DEFAULT_FORCE_ASPECT_RATIO,
110 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
112 g_object_class_install_property (gobject_class, PROP_PIXEL_ASPECT_RATIO,
113 gst_param_spec_fraction ("pixel-aspect-ratio", "Pixel Aspect Ratio",
114 "The pixel aspect ratio of the device", DEFAULT_PAR_N, DEFAULT_PAR_D,
115 G_MAXINT, 1, 1, 1, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
117 g_object_class_install_property (gobject_class, PROP_IGNORE_ALPHA,
118 g_param_spec_boolean ("ignore-alpha", "Ignore Alpha",
119 "When enabled, alpha will be ignored and converted to black",
120 DEFAULT_IGNORE_ALPHA, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
122 gobject_class->finalize = gst_gtk_base_sink_finalize;
124 gstelement_class->change_state = gst_gtk_base_sink_change_state;
125 gstbasesink_class->set_caps = gst_gtk_base_sink_set_caps;
126 gstbasesink_class->get_times = gst_gtk_base_sink_get_times;
127 gstbasesink_class->start = gst_gtk_base_sink_start;
128 gstbasesink_class->stop = gst_gtk_base_sink_stop;
130 gstvideosink_class->show_frame = gst_gtk_base_sink_show_frame;
132 gst_type_mark_as_plugin_api (GST_TYPE_GTK_BASE_SINK, 0);
136 gst_gtk_base_sink_init (GstGtkBaseSink * gtk_sink)
138 gtk_sink->force_aspect_ratio = DEFAULT_FORCE_ASPECT_RATIO;
139 gtk_sink->par_n = DEFAULT_PAR_N;
140 gtk_sink->par_d = DEFAULT_PAR_D;
141 gtk_sink->ignore_alpha = DEFAULT_IGNORE_ALPHA;
145 gst_gtk_base_sink_finalize (GObject * object)
147 GstGtkBaseSink *gtk_sink = GST_GTK_BASE_SINK (object);
149 GST_OBJECT_LOCK (gtk_sink);
150 if (gtk_sink->window && gtk_sink->window_destroy_id)
151 g_signal_handler_disconnect (gtk_sink->window, gtk_sink->window_destroy_id);
152 if (gtk_sink->widget && gtk_sink->widget_destroy_id)
153 g_signal_handler_disconnect (gtk_sink->widget, gtk_sink->widget_destroy_id);
155 g_clear_object (>k_sink->widget);
156 GST_OBJECT_UNLOCK (gtk_sink);
158 G_OBJECT_CLASS (parent_class)->finalize (object);
162 widget_destroy_cb (GtkWidget * widget, GstGtkBaseSink * gtk_sink)
164 GST_OBJECT_LOCK (gtk_sink);
165 g_clear_object (>k_sink->widget);
166 GST_OBJECT_UNLOCK (gtk_sink);
170 window_destroy_cb (GtkWidget * widget, GstGtkBaseSink * gtk_sink)
172 GST_OBJECT_LOCK (gtk_sink);
173 gtk_sink->window = NULL;
174 GST_OBJECT_UNLOCK (gtk_sink);
177 static GtkGstBaseWidget *
178 gst_gtk_base_sink_get_widget (GstGtkBaseSink * gtk_sink)
180 if (gtk_sink->widget != NULL)
181 return gtk_sink->widget;
183 /* Ensure GTK is initialized, this has no side effect if it was already
184 * initialized. Also, we do that lazily, so the application can be first */
185 if (!gtk_init_check (NULL, NULL)) {
186 GST_ERROR_OBJECT (gtk_sink, "Could not ensure GTK initialization.");
190 g_assert (GST_GTK_BASE_SINK_GET_CLASS (gtk_sink)->create_widget);
191 gtk_sink->widget = (GtkGstBaseWidget *)
192 GST_GTK_BASE_SINK_GET_CLASS (gtk_sink)->create_widget ();
194 gtk_sink->bind_aspect_ratio =
195 g_object_bind_property (gtk_sink, "force-aspect-ratio", gtk_sink->widget,
196 "force-aspect-ratio", G_BINDING_BIDIRECTIONAL | G_BINDING_SYNC_CREATE);
197 gtk_sink->bind_pixel_aspect_ratio =
198 g_object_bind_property (gtk_sink, "pixel-aspect-ratio", gtk_sink->widget,
199 "pixel-aspect-ratio", G_BINDING_BIDIRECTIONAL | G_BINDING_SYNC_CREATE);
200 gtk_sink->bind_ignore_alpha =
201 g_object_bind_property (gtk_sink, "ignore-alpha", gtk_sink->widget,
202 "ignore-alpha", G_BINDING_BIDIRECTIONAL | G_BINDING_SYNC_CREATE);
204 /* Take the floating ref, other wise the destruction of the container will
205 * make this widget disappear possibly before we are done. */
206 gst_object_ref_sink (gtk_sink->widget);
207 gtk_sink->widget_destroy_id = g_signal_connect (gtk_sink->widget, "destroy",
208 G_CALLBACK (widget_destroy_cb), gtk_sink);
211 gtk_gst_base_widget_set_element (GTK_GST_BASE_WIDGET (gtk_sink->widget),
212 GST_ELEMENT (gtk_sink));
214 return gtk_sink->widget;
218 gst_gtk_base_sink_get_property (GObject * object, guint prop_id,
219 GValue * value, GParamSpec * pspec)
221 GstGtkBaseSink *gtk_sink = GST_GTK_BASE_SINK (object);
226 GObject *widget = NULL;
228 GST_OBJECT_LOCK (gtk_sink);
229 if (gtk_sink->widget != NULL)
230 widget = G_OBJECT (gtk_sink->widget);
231 GST_OBJECT_UNLOCK (gtk_sink);
235 gst_gtk_invoke_on_main ((GThreadFunc) gst_gtk_base_sink_get_widget,
238 g_value_set_object (value, widget);
241 case PROP_FORCE_ASPECT_RATIO:
242 g_value_set_boolean (value, gtk_sink->force_aspect_ratio);
244 case PROP_PIXEL_ASPECT_RATIO:
245 gst_value_set_fraction (value, gtk_sink->par_n, gtk_sink->par_d);
247 case PROP_IGNORE_ALPHA:
248 g_value_set_boolean (value, gtk_sink->ignore_alpha);
251 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
257 gst_gtk_base_sink_set_property (GObject * object, guint prop_id,
258 const GValue * value, GParamSpec * pspec)
260 GstGtkBaseSink *gtk_sink = GST_GTK_BASE_SINK (object);
263 case PROP_FORCE_ASPECT_RATIO:
264 gtk_sink->force_aspect_ratio = g_value_get_boolean (value);
266 case PROP_PIXEL_ASPECT_RATIO:
267 gtk_sink->par_n = gst_value_get_fraction_numerator (value);
268 gtk_sink->par_d = gst_value_get_fraction_denominator (value);
270 case PROP_IGNORE_ALPHA:
271 gtk_sink->ignore_alpha = g_value_get_boolean (value);
274 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
280 gst_gtk_base_sink_navigation_send_event (GstNavigation * navigation,
281 GstStructure * structure)
283 GstGtkBaseSink *sink = GST_GTK_BASE_SINK (navigation);
288 if (gst_structure_get_double (structure, "pointer_x", &x) &&
289 gst_structure_get_double (structure, "pointer_y", &y)) {
290 GtkGstBaseWidget *widget = gst_gtk_base_sink_get_widget (sink);
291 gdouble stream_x, stream_y;
293 gtk_gst_base_widget_display_size_to_stream_size (widget,
294 x, y, &stream_x, &stream_y);
295 gst_structure_set (structure,
296 "pointer_x", G_TYPE_DOUBLE, (gdouble) stream_x,
297 "pointer_y", G_TYPE_DOUBLE, (gdouble) stream_y, NULL);
300 event = gst_event_new_navigation (structure);
301 pad = gst_pad_get_peer (GST_VIDEO_SINK_PAD (sink));
303 GST_TRACE_OBJECT (sink, "navigation event %" GST_PTR_FORMAT, structure);
305 if (GST_IS_PAD (pad) && GST_IS_EVENT (event)) {
306 if (!gst_pad_send_event (pad, gst_event_ref (event))) {
307 /* If upstream didn't handle the event we'll post a message with it
308 * for the application in case it wants to do something with it */
309 gst_element_post_message (GST_ELEMENT_CAST (sink),
310 gst_navigation_message_new_event (GST_OBJECT_CAST (sink), event));
312 gst_event_unref (event);
313 gst_object_unref (pad);
318 gst_gtk_base_sink_navigation_interface_init (GstNavigationInterface * iface)
320 iface->send_event = gst_gtk_base_sink_navigation_send_event;
324 gst_gtk_base_sink_start_on_main (GstBaseSink * bsink)
326 GstGtkBaseSink *gst_sink = GST_GTK_BASE_SINK (bsink);
327 GstGtkBaseSinkClass *klass = GST_GTK_BASE_SINK_GET_CLASS (bsink);
330 if (gst_gtk_base_sink_get_widget (gst_sink) == NULL)
333 /* After this point, gtk_sink->widget will always be set */
335 toplevel = gtk_widget_get_toplevel (GTK_WIDGET (gst_sink->widget));
336 if (!gtk_widget_is_toplevel (toplevel)) {
338 g_assert (klass->window_title);
340 /* User did not add widget its own UI, let's popup a new GtkWindow to
341 * make gst-launch-1.0 work. */
342 gst_sink->window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
343 gtk_window_set_default_size (GTK_WINDOW (gst_sink->window), 640, 480);
344 gtk_window_set_title (GTK_WINDOW (gst_sink->window), klass->window_title);
345 gtk_container_add (GTK_CONTAINER (gst_sink->window), toplevel);
346 gst_sink->window_destroy_id = g_signal_connect (gst_sink->window, "destroy",
347 G_CALLBACK (window_destroy_cb), gst_sink);
354 gst_gtk_base_sink_start (GstBaseSink * bsink)
356 return ! !gst_gtk_invoke_on_main ((GThreadFunc)
357 gst_gtk_base_sink_start_on_main, bsink);
361 gst_gtk_base_sink_stop_on_main (GstBaseSink * bsink)
363 GstGtkBaseSink *gst_sink = GST_GTK_BASE_SINK (bsink);
365 if (gst_sink->window) {
366 gtk_widget_destroy (gst_sink->window);
367 gst_sink->window = NULL;
368 gst_sink->widget = NULL;
375 gst_gtk_base_sink_stop (GstBaseSink * bsink)
377 GstGtkBaseSink *gst_sink = GST_GTK_BASE_SINK (bsink);
379 if (gst_sink->window)
380 return ! !gst_gtk_invoke_on_main ((GThreadFunc)
381 gst_gtk_base_sink_stop_on_main, bsink);
387 gst_gtk_widget_show_all_and_unref (GtkWidget * widget)
389 gtk_widget_show_all (widget);
390 g_object_unref (widget);
393 static GstStateChangeReturn
394 gst_gtk_base_sink_change_state (GstElement * element, GstStateChange transition)
396 GstGtkBaseSink *gtk_sink = GST_GTK_BASE_SINK (element);
397 GstStateChangeReturn ret = GST_STATE_CHANGE_SUCCESS;
399 GST_DEBUG_OBJECT (element, "changing state: %s => %s",
400 gst_element_state_get_name (GST_STATE_TRANSITION_CURRENT (transition)),
401 gst_element_state_get_name (GST_STATE_TRANSITION_NEXT (transition)));
403 ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
404 if (ret == GST_STATE_CHANGE_FAILURE)
407 switch (transition) {
408 case GST_STATE_CHANGE_READY_TO_PAUSED:
410 GtkWindow *window = NULL;
412 GST_OBJECT_LOCK (gtk_sink);
413 if (gtk_sink->window)
414 window = g_object_ref (GTK_WINDOW (gtk_sink->window));
415 GST_OBJECT_UNLOCK (gtk_sink);
418 gst_gtk_invoke_on_main ((GThreadFunc) gst_gtk_widget_show_all_and_unref,
423 case GST_STATE_CHANGE_PAUSED_TO_READY:
424 GST_OBJECT_LOCK (gtk_sink);
425 if (gtk_sink->widget)
426 gtk_gst_base_widget_set_buffer (gtk_sink->widget, NULL);
427 GST_OBJECT_UNLOCK (gtk_sink);
437 gst_gtk_base_sink_get_times (GstBaseSink * bsink, GstBuffer * buf,
438 GstClockTime * start, GstClockTime * end)
440 GstGtkBaseSink *gtk_sink;
442 gtk_sink = GST_GTK_BASE_SINK (bsink);
444 if (GST_BUFFER_TIMESTAMP_IS_VALID (buf)) {
445 *start = GST_BUFFER_TIMESTAMP (buf);
446 if (GST_BUFFER_DURATION_IS_VALID (buf))
447 *end = *start + GST_BUFFER_DURATION (buf);
449 if (GST_VIDEO_INFO_FPS_N (>k_sink->v_info) > 0) {
451 gst_util_uint64_scale_int (GST_SECOND,
452 GST_VIDEO_INFO_FPS_D (>k_sink->v_info),
453 GST_VIDEO_INFO_FPS_N (>k_sink->v_info));
460 gst_gtk_base_sink_set_caps (GstBaseSink * bsink, GstCaps * caps)
462 GstGtkBaseSink *gtk_sink = GST_GTK_BASE_SINK (bsink);
464 GST_DEBUG ("set caps with %" GST_PTR_FORMAT, caps);
466 if (!gst_video_info_from_caps (>k_sink->v_info, caps))
469 GST_OBJECT_LOCK (gtk_sink);
471 if (gtk_sink->widget == NULL) {
472 GST_OBJECT_UNLOCK (gtk_sink);
473 GST_ELEMENT_ERROR (gtk_sink, RESOURCE, NOT_FOUND,
474 ("%s", "Output widget was destroyed"), (NULL));
478 if (!gtk_gst_base_widget_set_format (gtk_sink->widget, >k_sink->v_info)) {
479 GST_OBJECT_UNLOCK (gtk_sink);
482 GST_OBJECT_UNLOCK (gtk_sink);
488 gst_gtk_base_sink_show_frame (GstVideoSink * vsink, GstBuffer * buf)
490 GstGtkBaseSink *gtk_sink;
492 GST_TRACE ("rendering buffer:%p", buf);
494 gtk_sink = GST_GTK_BASE_SINK (vsink);
496 GST_OBJECT_LOCK (vsink);
498 if (gtk_sink->widget == NULL) {
499 GST_OBJECT_UNLOCK (gtk_sink);
500 GST_ELEMENT_ERROR (gtk_sink, RESOURCE, NOT_FOUND,
501 ("%s", "Output widget was destroyed"), (NULL));
502 return GST_FLOW_ERROR;
505 gtk_gst_base_widget_set_buffer (gtk_sink->widget, buf);
507 GST_OBJECT_UNLOCK (gtk_sink);