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.
30 #include "gstgtkbasesink.h"
31 #include "gstgtkutils.h"
33 GST_DEBUG_CATEGORY (gst_debug_gtk_base_sink);
34 #define GST_CAT_DEFAULT gst_debug_gtk_base_sink
36 #define DEFAULT_FORCE_ASPECT_RATIO TRUE
37 #define DEFAULT_PAR_N 0
38 #define DEFAULT_PAR_D 1
39 #define DEFAULT_IGNORE_ALPHA TRUE
41 static void gst_gtk_base_sink_finalize (GObject * object);
42 static void gst_gtk_base_sink_set_property (GObject * object, guint prop_id,
43 const GValue * value, GParamSpec * param_spec);
44 static void gst_gtk_base_sink_get_property (GObject * object, guint prop_id,
45 GValue * value, GParamSpec * param_spec);
47 static gboolean gst_gtk_base_sink_start (GstBaseSink * bsink);
48 static gboolean gst_gtk_base_sink_stop (GstBaseSink * bsink);
50 static GstStateChangeReturn
51 gst_gtk_base_sink_change_state (GstElement * element,
52 GstStateChange transition);
54 static void gst_gtk_base_sink_get_times (GstBaseSink * bsink, GstBuffer * buf,
55 GstClockTime * start, GstClockTime * end);
56 static gboolean gst_gtk_base_sink_set_caps (GstBaseSink * bsink,
58 static GstFlowReturn gst_gtk_base_sink_show_frame (GstVideoSink * bsink,
62 gst_gtk_base_sink_navigation_interface_init (GstNavigationInterface * iface);
68 PROP_FORCE_ASPECT_RATIO,
69 PROP_PIXEL_ASPECT_RATIO,
73 #define gst_gtk_base_sink_parent_class parent_class
74 G_DEFINE_ABSTRACT_TYPE_WITH_CODE (GstGtkBaseSink, gst_gtk_base_sink,
76 G_IMPLEMENT_INTERFACE (GST_TYPE_NAVIGATION,
77 gst_gtk_base_sink_navigation_interface_init);
78 GST_DEBUG_CATEGORY_INIT (gst_debug_gtk_base_sink,
79 "gtkbasesink", 0, "Gtk Video Sink base class"));
83 gst_gtk_base_sink_class_init (GstGtkBaseSinkClass * klass)
85 GObjectClass *gobject_class;
86 GstElementClass *gstelement_class;
87 GstBaseSinkClass *gstbasesink_class;
88 GstVideoSinkClass *gstvideosink_class;
90 gobject_class = (GObjectClass *) klass;
91 gstelement_class = (GstElementClass *) klass;
92 gstbasesink_class = (GstBaseSinkClass *) klass;
93 gstvideosink_class = (GstVideoSinkClass *) klass;
95 gobject_class->set_property = gst_gtk_base_sink_set_property;
96 gobject_class->get_property = gst_gtk_base_sink_get_property;
98 g_object_class_install_property (gobject_class, PROP_WIDGET,
99 g_param_spec_object ("widget", "Gtk Widget",
100 "The GtkWidget to place in the widget hierarchy "
101 "(must only be get from the GTK main thread)",
102 GTK_TYPE_WIDGET, G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
104 g_object_class_install_property (gobject_class, PROP_FORCE_ASPECT_RATIO,
105 g_param_spec_boolean ("force-aspect-ratio",
106 "Force aspect ratio",
107 "When enabled, scaling will respect original aspect ratio",
108 DEFAULT_FORCE_ASPECT_RATIO,
109 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
111 g_object_class_install_property (gobject_class, PROP_PIXEL_ASPECT_RATIO,
112 gst_param_spec_fraction ("pixel-aspect-ratio", "Pixel Aspect Ratio",
113 "The pixel aspect ratio of the device", DEFAULT_PAR_N, DEFAULT_PAR_D,
114 G_MAXINT, 1, 1, 1, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
116 g_object_class_install_property (gobject_class, PROP_IGNORE_ALPHA,
117 g_param_spec_boolean ("ignore-alpha", "Ignore Alpha",
118 "When enabled, alpha will be ignored and converted to black",
119 DEFAULT_IGNORE_ALPHA, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
121 gobject_class->finalize = gst_gtk_base_sink_finalize;
123 gstelement_class->change_state = gst_gtk_base_sink_change_state;
124 gstbasesink_class->set_caps = gst_gtk_base_sink_set_caps;
125 gstbasesink_class->get_times = gst_gtk_base_sink_get_times;
126 gstbasesink_class->start = gst_gtk_base_sink_start;
127 gstbasesink_class->stop = gst_gtk_base_sink_stop;
129 gstvideosink_class->show_frame = gst_gtk_base_sink_show_frame;
133 gst_gtk_base_sink_init (GstGtkBaseSink * gtk_sink)
135 gtk_sink->force_aspect_ratio = DEFAULT_FORCE_ASPECT_RATIO;
136 gtk_sink->par_n = DEFAULT_PAR_N;
137 gtk_sink->par_d = DEFAULT_PAR_D;
138 gtk_sink->ignore_alpha = DEFAULT_IGNORE_ALPHA;
142 gst_gtk_base_sink_finalize (GObject * object)
144 GstGtkBaseSink *gtk_sink = GST_GTK_BASE_SINK (object);
146 GST_OBJECT_LOCK (gtk_sink);
147 if (gtk_sink->window && gtk_sink->window_destroy_id)
148 g_signal_handler_disconnect (gtk_sink->window, gtk_sink->window_destroy_id);
149 if (gtk_sink->widget && gtk_sink->widget_destroy_id)
150 g_signal_handler_disconnect (gtk_sink->widget, gtk_sink->widget_destroy_id);
152 g_clear_object (>k_sink->widget);
153 GST_OBJECT_UNLOCK (gtk_sink);
155 G_OBJECT_CLASS (parent_class)->finalize (object);
159 widget_destroy_cb (GtkWidget * widget, GstGtkBaseSink * gtk_sink)
161 GST_OBJECT_LOCK (gtk_sink);
162 g_clear_object (>k_sink->widget);
163 GST_OBJECT_UNLOCK (gtk_sink);
167 window_destroy_cb (GtkWidget * widget, GstGtkBaseSink * gtk_sink)
169 GST_OBJECT_LOCK (gtk_sink);
170 gtk_sink->window = NULL;
171 GST_OBJECT_UNLOCK (gtk_sink);
174 static GtkGstBaseWidget *
175 gst_gtk_base_sink_get_widget (GstGtkBaseSink * gtk_sink)
177 if (gtk_sink->widget != NULL)
178 return gtk_sink->widget;
180 /* Ensure GTK is initialized, this has no side effect if it was already
181 * initialized. Also, we do that lazily, so the application can be first */
182 if (!gtk_init_check (NULL, NULL)) {
183 GST_ERROR_OBJECT (gtk_sink, "Could not ensure GTK initialization.");
187 g_assert (GST_GTK_BASE_SINK_GET_CLASS (gtk_sink)->create_widget);
188 gtk_sink->widget = (GtkGstBaseWidget *)
189 GST_GTK_BASE_SINK_GET_CLASS (gtk_sink)->create_widget ();
191 gtk_sink->bind_aspect_ratio =
192 g_object_bind_property (gtk_sink, "force-aspect-ratio", gtk_sink->widget,
193 "force-aspect-ratio", G_BINDING_BIDIRECTIONAL | G_BINDING_SYNC_CREATE);
194 gtk_sink->bind_pixel_aspect_ratio =
195 g_object_bind_property (gtk_sink, "pixel-aspect-ratio", gtk_sink->widget,
196 "pixel-aspect-ratio", G_BINDING_BIDIRECTIONAL | G_BINDING_SYNC_CREATE);
197 gtk_sink->bind_ignore_alpha =
198 g_object_bind_property (gtk_sink, "ignore-alpha", gtk_sink->widget,
199 "ignore-alpha", G_BINDING_BIDIRECTIONAL | G_BINDING_SYNC_CREATE);
201 /* Take the floating ref, other wise the destruction of the container will
202 * make this widget disapear possibly before we are done. */
203 gst_object_ref_sink (gtk_sink->widget);
204 gtk_sink->widget_destroy_id = g_signal_connect (gtk_sink->widget, "destroy",
205 G_CALLBACK (widget_destroy_cb), gtk_sink);
208 gtk_gst_base_widget_set_element (GTK_GST_BASE_WIDGET (gtk_sink->widget),
209 GST_ELEMENT (gtk_sink));
211 return gtk_sink->widget;
215 gst_gtk_base_sink_get_property (GObject * object, guint prop_id,
216 GValue * value, GParamSpec * pspec)
218 GstGtkBaseSink *gtk_sink = GST_GTK_BASE_SINK (object);
223 GObject *widget = NULL;
225 GST_OBJECT_LOCK (gtk_sink);
226 if (gtk_sink->widget != NULL)
227 widget = G_OBJECT (gtk_sink->widget);
228 GST_OBJECT_UNLOCK (gtk_sink);
232 gst_gtk_invoke_on_main ((GThreadFunc) gst_gtk_base_sink_get_widget,
235 g_value_set_object (value, widget);
238 case PROP_FORCE_ASPECT_RATIO:
239 g_value_set_boolean (value, gtk_sink->force_aspect_ratio);
241 case PROP_PIXEL_ASPECT_RATIO:
242 gst_value_set_fraction (value, gtk_sink->par_n, gtk_sink->par_d);
244 case PROP_IGNORE_ALPHA:
245 g_value_set_boolean (value, gtk_sink->ignore_alpha);
248 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
254 gst_gtk_base_sink_set_property (GObject * object, guint prop_id,
255 const GValue * value, GParamSpec * pspec)
257 GstGtkBaseSink *gtk_sink = GST_GTK_BASE_SINK (object);
260 case PROP_FORCE_ASPECT_RATIO:
261 gtk_sink->force_aspect_ratio = g_value_get_boolean (value);
263 case PROP_PIXEL_ASPECT_RATIO:
264 gtk_sink->par_n = gst_value_get_fraction_numerator (value);
265 gtk_sink->par_d = gst_value_get_fraction_denominator (value);
267 case PROP_IGNORE_ALPHA:
268 gtk_sink->ignore_alpha = g_value_get_boolean (value);
271 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
277 gst_gtk_base_sink_navigation_send_event (GstNavigation * navigation,
278 GstStructure * structure)
280 GstGtkBaseSink *sink = GST_GTK_BASE_SINK (navigation);
284 event = gst_event_new_navigation (structure);
285 pad = gst_pad_get_peer (GST_VIDEO_SINK_PAD (sink));
287 GST_TRACE_OBJECT (sink, "navigation event %" GST_PTR_FORMAT, structure);
289 if (GST_IS_PAD (pad)) {
290 if (GST_IS_EVENT (event))
291 gst_pad_send_event (pad, event);
293 gst_object_unref (pad);
298 gst_gtk_base_sink_navigation_interface_init (GstNavigationInterface * iface)
300 iface->send_event = gst_gtk_base_sink_navigation_send_event;
304 gst_gtk_base_sink_start_on_main (GstBaseSink * bsink)
306 GstGtkBaseSink *gst_sink = GST_GTK_BASE_SINK (bsink);
307 GstGtkBaseSinkClass *klass = GST_GTK_BASE_SINK_GET_CLASS (bsink);
310 if (gst_gtk_base_sink_get_widget (gst_sink) == NULL)
313 /* After this point, gtk_sink->widget will always be set */
315 toplevel = gtk_widget_get_toplevel (GTK_WIDGET (gst_sink->widget));
316 if (!gtk_widget_is_toplevel (toplevel)) {
318 g_assert (klass->window_title);
320 /* User did not add widget its own UI, let's popup a new GtkWindow to
321 * make gst-launch-1.0 work. */
322 gst_sink->window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
323 gtk_window_set_default_size (GTK_WINDOW (gst_sink->window), 640, 480);
324 gtk_window_set_title (GTK_WINDOW (gst_sink->window), klass->window_title);
325 gtk_container_add (GTK_CONTAINER (gst_sink->window), toplevel);
326 gst_sink->window_destroy_id = g_signal_connect (gst_sink->window, "destroy",
327 G_CALLBACK (window_destroy_cb), gst_sink);
334 gst_gtk_base_sink_start (GstBaseSink * bsink)
336 return ! !gst_gtk_invoke_on_main ((GThreadFunc)
337 gst_gtk_base_sink_start_on_main, bsink);
341 gst_gtk_base_sink_stop_on_main (GstBaseSink * bsink)
343 GstGtkBaseSink *gst_sink = GST_GTK_BASE_SINK (bsink);
345 if (gst_sink->window) {
346 gtk_widget_destroy (gst_sink->window);
347 gst_sink->window = NULL;
348 gst_sink->widget = NULL;
355 gst_gtk_base_sink_stop (GstBaseSink * bsink)
357 GstGtkBaseSink *gst_sink = GST_GTK_BASE_SINK (bsink);
359 if (gst_sink->window)
360 return ! !gst_gtk_invoke_on_main ((GThreadFunc)
361 gst_gtk_base_sink_stop_on_main, bsink);
367 gst_gtk_widget_show_all_and_unref (GtkWidget * widget)
369 gtk_widget_show_all (widget);
370 g_object_unref (widget);
373 static GstStateChangeReturn
374 gst_gtk_base_sink_change_state (GstElement * element, GstStateChange transition)
376 GstGtkBaseSink *gtk_sink = GST_GTK_BASE_SINK (element);
377 GstStateChangeReturn ret = GST_STATE_CHANGE_SUCCESS;
379 GST_DEBUG_OBJECT (element, "changing state: %s => %s",
380 gst_element_state_get_name (GST_STATE_TRANSITION_CURRENT (transition)),
381 gst_element_state_get_name (GST_STATE_TRANSITION_NEXT (transition)));
383 ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
384 if (ret == GST_STATE_CHANGE_FAILURE)
387 switch (transition) {
388 case GST_STATE_CHANGE_READY_TO_PAUSED:
390 GtkWindow *window = NULL;
392 GST_OBJECT_LOCK (gtk_sink);
393 if (gtk_sink->window)
394 window = g_object_ref (gtk_sink->window);
395 GST_OBJECT_UNLOCK (gtk_sink);
398 gst_gtk_invoke_on_main ((GThreadFunc) gst_gtk_widget_show_all_and_unref,
403 case GST_STATE_CHANGE_PAUSED_TO_READY:
404 GST_OBJECT_LOCK (gtk_sink);
405 if (gtk_sink->widget)
406 gtk_gst_base_widget_set_buffer (gtk_sink->widget, NULL);
407 GST_OBJECT_UNLOCK (gtk_sink);
417 gst_gtk_base_sink_get_times (GstBaseSink * bsink, GstBuffer * buf,
418 GstClockTime * start, GstClockTime * end)
420 GstGtkBaseSink *gtk_sink;
422 gtk_sink = GST_GTK_BASE_SINK (bsink);
424 if (GST_BUFFER_TIMESTAMP_IS_VALID (buf)) {
425 *start = GST_BUFFER_TIMESTAMP (buf);
426 if (GST_BUFFER_DURATION_IS_VALID (buf))
427 *end = *start + GST_BUFFER_DURATION (buf);
429 if (GST_VIDEO_INFO_FPS_N (>k_sink->v_info) > 0) {
431 gst_util_uint64_scale_int (GST_SECOND,
432 GST_VIDEO_INFO_FPS_D (>k_sink->v_info),
433 GST_VIDEO_INFO_FPS_N (>k_sink->v_info));
440 gst_gtk_base_sink_set_caps (GstBaseSink * bsink, GstCaps * caps)
442 GstGtkBaseSink *gtk_sink = GST_GTK_BASE_SINK (bsink);
444 GST_DEBUG ("set caps with %" GST_PTR_FORMAT, caps);
446 if (!gst_video_info_from_caps (>k_sink->v_info, caps))
449 GST_OBJECT_LOCK (gtk_sink);
451 if (gtk_sink->widget == NULL) {
452 GST_OBJECT_UNLOCK (gtk_sink);
453 GST_ELEMENT_ERROR (gtk_sink, RESOURCE, NOT_FOUND,
454 ("%s", "Output widget was destroyed"), (NULL));
458 if (!gtk_gst_base_widget_set_format (gtk_sink->widget, >k_sink->v_info)) {
459 GST_OBJECT_UNLOCK (gtk_sink);
462 GST_OBJECT_UNLOCK (gtk_sink);
468 gst_gtk_base_sink_show_frame (GstVideoSink * vsink, GstBuffer * buf)
470 GstGtkBaseSink *gtk_sink;
472 GST_TRACE ("rendering buffer:%p", buf);
474 gtk_sink = GST_GTK_BASE_SINK (vsink);
476 GST_OBJECT_LOCK (vsink);
478 if (gtk_sink->widget == NULL) {
479 GST_OBJECT_UNLOCK (gtk_sink);
480 GST_ELEMENT_ERROR (gtk_sink, RESOURCE, NOT_FOUND,
481 ("%s", "Output widget was destroyed"), (NULL));
482 return GST_FLOW_ERROR;
485 gtk_gst_base_widget_set_buffer (gtk_sink->widget, buf);
487 GST_OBJECT_UNLOCK (gtk_sink);