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;
134 gst_gtk_base_sink_init (GstGtkBaseSink * gtk_sink)
136 gtk_sink->force_aspect_ratio = DEFAULT_FORCE_ASPECT_RATIO;
137 gtk_sink->par_n = DEFAULT_PAR_N;
138 gtk_sink->par_d = DEFAULT_PAR_D;
139 gtk_sink->ignore_alpha = DEFAULT_IGNORE_ALPHA;
143 gst_gtk_base_sink_finalize (GObject * object)
145 GstGtkBaseSink *gtk_sink = GST_GTK_BASE_SINK (object);
147 GST_OBJECT_LOCK (gtk_sink);
148 if (gtk_sink->window && gtk_sink->window_destroy_id)
149 g_signal_handler_disconnect (gtk_sink->window, gtk_sink->window_destroy_id);
150 if (gtk_sink->widget && gtk_sink->widget_destroy_id)
151 g_signal_handler_disconnect (gtk_sink->widget, gtk_sink->widget_destroy_id);
153 g_clear_object (>k_sink->widget);
154 GST_OBJECT_UNLOCK (gtk_sink);
156 G_OBJECT_CLASS (parent_class)->finalize (object);
160 widget_destroy_cb (GtkWidget * widget, GstGtkBaseSink * gtk_sink)
162 GST_OBJECT_LOCK (gtk_sink);
163 g_clear_object (>k_sink->widget);
164 GST_OBJECT_UNLOCK (gtk_sink);
168 window_destroy_cb (GtkWidget * widget, GstGtkBaseSink * gtk_sink)
170 GST_OBJECT_LOCK (gtk_sink);
171 gtk_sink->window = NULL;
172 GST_OBJECT_UNLOCK (gtk_sink);
175 static GtkGstBaseWidget *
176 gst_gtk_base_sink_get_widget (GstGtkBaseSink * gtk_sink)
178 if (gtk_sink->widget != NULL)
179 return gtk_sink->widget;
181 /* Ensure GTK is initialized, this has no side effect if it was already
182 * initialized. Also, we do that lazily, so the application can be first */
183 if (!gtk_init_check (NULL, NULL)) {
184 GST_ERROR_OBJECT (gtk_sink, "Could not ensure GTK initialization.");
188 g_assert (GST_GTK_BASE_SINK_GET_CLASS (gtk_sink)->create_widget);
189 gtk_sink->widget = (GtkGstBaseWidget *)
190 GST_GTK_BASE_SINK_GET_CLASS (gtk_sink)->create_widget ();
192 gtk_sink->bind_aspect_ratio =
193 g_object_bind_property (gtk_sink, "force-aspect-ratio", gtk_sink->widget,
194 "force-aspect-ratio", G_BINDING_BIDIRECTIONAL | G_BINDING_SYNC_CREATE);
195 gtk_sink->bind_pixel_aspect_ratio =
196 g_object_bind_property (gtk_sink, "pixel-aspect-ratio", gtk_sink->widget,
197 "pixel-aspect-ratio", G_BINDING_BIDIRECTIONAL | G_BINDING_SYNC_CREATE);
198 gtk_sink->bind_ignore_alpha =
199 g_object_bind_property (gtk_sink, "ignore-alpha", gtk_sink->widget,
200 "ignore-alpha", G_BINDING_BIDIRECTIONAL | G_BINDING_SYNC_CREATE);
202 /* Take the floating ref, other wise the destruction of the container will
203 * make this widget disapear possibly before we are done. */
204 gst_object_ref_sink (gtk_sink->widget);
205 gtk_sink->widget_destroy_id = g_signal_connect (gtk_sink->widget, "destroy",
206 G_CALLBACK (widget_destroy_cb), gtk_sink);
209 gtk_gst_base_widget_set_element (GTK_GST_BASE_WIDGET (gtk_sink->widget),
210 GST_ELEMENT (gtk_sink));
212 return gtk_sink->widget;
216 gst_gtk_base_sink_get_property (GObject * object, guint prop_id,
217 GValue * value, GParamSpec * pspec)
219 GstGtkBaseSink *gtk_sink = GST_GTK_BASE_SINK (object);
224 GObject *widget = NULL;
226 GST_OBJECT_LOCK (gtk_sink);
227 if (gtk_sink->widget != NULL)
228 widget = G_OBJECT (gtk_sink->widget);
229 GST_OBJECT_UNLOCK (gtk_sink);
233 gst_gtk_invoke_on_main ((GThreadFunc) gst_gtk_base_sink_get_widget,
236 g_value_set_object (value, widget);
239 case PROP_FORCE_ASPECT_RATIO:
240 g_value_set_boolean (value, gtk_sink->force_aspect_ratio);
242 case PROP_PIXEL_ASPECT_RATIO:
243 gst_value_set_fraction (value, gtk_sink->par_n, gtk_sink->par_d);
245 case PROP_IGNORE_ALPHA:
246 g_value_set_boolean (value, gtk_sink->ignore_alpha);
249 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
255 gst_gtk_base_sink_set_property (GObject * object, guint prop_id,
256 const GValue * value, GParamSpec * pspec)
258 GstGtkBaseSink *gtk_sink = GST_GTK_BASE_SINK (object);
261 case PROP_FORCE_ASPECT_RATIO:
262 gtk_sink->force_aspect_ratio = g_value_get_boolean (value);
264 case PROP_PIXEL_ASPECT_RATIO:
265 gtk_sink->par_n = gst_value_get_fraction_numerator (value);
266 gtk_sink->par_d = gst_value_get_fraction_denominator (value);
268 case PROP_IGNORE_ALPHA:
269 gtk_sink->ignore_alpha = g_value_get_boolean (value);
272 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
278 gst_gtk_base_sink_navigation_send_event (GstNavigation * navigation,
279 GstStructure * structure)
281 GstGtkBaseSink *sink = GST_GTK_BASE_SINK (navigation);
285 event = gst_event_new_navigation (structure);
286 pad = gst_pad_get_peer (GST_VIDEO_SINK_PAD (sink));
288 GST_TRACE_OBJECT (sink, "navigation event %" GST_PTR_FORMAT, structure);
290 if (GST_IS_PAD (pad) && GST_IS_EVENT (event)) {
291 if (!gst_pad_send_event (pad, gst_event_ref (event))) {
292 /* If upstream didn't handle the event we'll post a message with it
293 * for the application in case it wants to do something with it */
294 gst_element_post_message (GST_ELEMENT_CAST (sink),
295 gst_navigation_message_new_event (GST_OBJECT_CAST (sink), event));
297 gst_event_unref (event);
298 gst_object_unref (pad);
303 gst_gtk_base_sink_navigation_interface_init (GstNavigationInterface * iface)
305 iface->send_event = gst_gtk_base_sink_navigation_send_event;
309 gst_gtk_base_sink_start_on_main (GstBaseSink * bsink)
311 GstGtkBaseSink *gst_sink = GST_GTK_BASE_SINK (bsink);
312 GstGtkBaseSinkClass *klass = GST_GTK_BASE_SINK_GET_CLASS (bsink);
315 if (gst_gtk_base_sink_get_widget (gst_sink) == NULL)
318 /* After this point, gtk_sink->widget will always be set */
320 toplevel = gtk_widget_get_toplevel (GTK_WIDGET (gst_sink->widget));
321 if (!gtk_widget_is_toplevel (toplevel)) {
323 g_assert (klass->window_title);
325 /* User did not add widget its own UI, let's popup a new GtkWindow to
326 * make gst-launch-1.0 work. */
327 gst_sink->window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
328 gtk_window_set_default_size (GTK_WINDOW (gst_sink->window), 640, 480);
329 gtk_window_set_title (GTK_WINDOW (gst_sink->window), klass->window_title);
330 gtk_container_add (GTK_CONTAINER (gst_sink->window), toplevel);
331 gst_sink->window_destroy_id = g_signal_connect (gst_sink->window, "destroy",
332 G_CALLBACK (window_destroy_cb), gst_sink);
339 gst_gtk_base_sink_start (GstBaseSink * bsink)
341 return ! !gst_gtk_invoke_on_main ((GThreadFunc)
342 gst_gtk_base_sink_start_on_main, bsink);
346 gst_gtk_base_sink_stop_on_main (GstBaseSink * bsink)
348 GstGtkBaseSink *gst_sink = GST_GTK_BASE_SINK (bsink);
350 if (gst_sink->window) {
351 gtk_widget_destroy (gst_sink->window);
352 gst_sink->window = NULL;
353 gst_sink->widget = NULL;
360 gst_gtk_base_sink_stop (GstBaseSink * bsink)
362 GstGtkBaseSink *gst_sink = GST_GTK_BASE_SINK (bsink);
364 if (gst_sink->window)
365 return ! !gst_gtk_invoke_on_main ((GThreadFunc)
366 gst_gtk_base_sink_stop_on_main, bsink);
372 gst_gtk_widget_show_all_and_unref (GtkWidget * widget)
374 gtk_widget_show_all (widget);
375 g_object_unref (widget);
378 static GstStateChangeReturn
379 gst_gtk_base_sink_change_state (GstElement * element, GstStateChange transition)
381 GstGtkBaseSink *gtk_sink = GST_GTK_BASE_SINK (element);
382 GstStateChangeReturn ret = GST_STATE_CHANGE_SUCCESS;
384 GST_DEBUG_OBJECT (element, "changing state: %s => %s",
385 gst_element_state_get_name (GST_STATE_TRANSITION_CURRENT (transition)),
386 gst_element_state_get_name (GST_STATE_TRANSITION_NEXT (transition)));
388 ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
389 if (ret == GST_STATE_CHANGE_FAILURE)
392 switch (transition) {
393 case GST_STATE_CHANGE_READY_TO_PAUSED:
395 GtkWindow *window = NULL;
397 GST_OBJECT_LOCK (gtk_sink);
398 if (gtk_sink->window)
399 window = g_object_ref (GTK_WINDOW (gtk_sink->window));
400 GST_OBJECT_UNLOCK (gtk_sink);
403 gst_gtk_invoke_on_main ((GThreadFunc) gst_gtk_widget_show_all_and_unref,
408 case GST_STATE_CHANGE_PAUSED_TO_READY:
409 GST_OBJECT_LOCK (gtk_sink);
410 if (gtk_sink->widget)
411 gtk_gst_base_widget_set_buffer (gtk_sink->widget, NULL);
412 GST_OBJECT_UNLOCK (gtk_sink);
422 gst_gtk_base_sink_get_times (GstBaseSink * bsink, GstBuffer * buf,
423 GstClockTime * start, GstClockTime * end)
425 GstGtkBaseSink *gtk_sink;
427 gtk_sink = GST_GTK_BASE_SINK (bsink);
429 if (GST_BUFFER_TIMESTAMP_IS_VALID (buf)) {
430 *start = GST_BUFFER_TIMESTAMP (buf);
431 if (GST_BUFFER_DURATION_IS_VALID (buf))
432 *end = *start + GST_BUFFER_DURATION (buf);
434 if (GST_VIDEO_INFO_FPS_N (>k_sink->v_info) > 0) {
436 gst_util_uint64_scale_int (GST_SECOND,
437 GST_VIDEO_INFO_FPS_D (>k_sink->v_info),
438 GST_VIDEO_INFO_FPS_N (>k_sink->v_info));
445 gst_gtk_base_sink_set_caps (GstBaseSink * bsink, GstCaps * caps)
447 GstGtkBaseSink *gtk_sink = GST_GTK_BASE_SINK (bsink);
449 GST_DEBUG ("set caps with %" GST_PTR_FORMAT, caps);
451 if (!gst_video_info_from_caps (>k_sink->v_info, caps))
454 GST_OBJECT_LOCK (gtk_sink);
456 if (gtk_sink->widget == NULL) {
457 GST_OBJECT_UNLOCK (gtk_sink);
458 GST_ELEMENT_ERROR (gtk_sink, RESOURCE, NOT_FOUND,
459 ("%s", "Output widget was destroyed"), (NULL));
463 if (!gtk_gst_base_widget_set_format (gtk_sink->widget, >k_sink->v_info)) {
464 GST_OBJECT_UNLOCK (gtk_sink);
467 GST_OBJECT_UNLOCK (gtk_sink);
473 gst_gtk_base_sink_show_frame (GstVideoSink * vsink, GstBuffer * buf)
475 GstGtkBaseSink *gtk_sink;
477 GST_TRACE ("rendering buffer:%p", buf);
479 gtk_sink = GST_GTK_BASE_SINK (vsink);
481 GST_OBJECT_LOCK (vsink);
483 if (gtk_sink->widget == NULL) {
484 GST_OBJECT_UNLOCK (gtk_sink);
485 GST_ELEMENT_ERROR (gtk_sink, RESOURCE, NOT_FOUND,
486 ("%s", "Output widget was destroyed"), (NULL));
487 return GST_FLOW_ERROR;
490 gtk_gst_base_widget_set_buffer (gtk_sink->widget, buf);
492 GST_OBJECT_UNLOCK (gtk_sink);