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.
27 #include "gtkgstglwidget.h"
28 #include <gst/video/video.h>
30 #if GST_GL_HAVE_WINDOW_X11 && defined (GDK_WINDOWING_X11)
32 #include <gst/gl/x11/gstgldisplay_x11.h>
33 #include <gst/gl/x11/gstglcontext_glx.h>
36 #if GST_GL_HAVE_WINDOW_WAYLAND && defined (GDK_WINDOWING_WAYLAND)
37 #include <gdk/gdkwayland.h>
38 #include <gst/gl/wayland/gstgldisplay_wayland.h>
42 * SECTION:gtkgstglwidget
43 * @short_description: a #GtkGLArea that renders GStreamer video #GstBuffers
44 * @see_also: #GtkGLArea, #GstBuffer
46 * #GtkGstGLWidget is an #GtkWidget that renders GStreamer video buffers.
49 #define GST_CAT_DEFAULT gtk_gst_gl_widget_debug
50 GST_DEBUG_CATEGORY_STATIC (GST_CAT_DEFAULT);
52 G_DEFINE_TYPE_WITH_CODE (GtkGstGLWidget, gtk_gst_gl_widget, GTK_TYPE_GL_AREA,
53 GST_DEBUG_CATEGORY_INIT (GST_CAT_DEFAULT, "gtkgstglwidget", 0,
54 "Gtk Gst GL Widget"););
56 #define GTK_GST_GL_WIDGET_GET_PRIVATE(obj) (G_TYPE_INSTANCE_GET_PRIVATE ((obj), \
57 GTK_TYPE_GST_GL_WIDGET, GtkGstGLWidgetPrivate))
59 #define DEFAULT_FORCE_ASPECT_RATIO TRUE
60 #define DEFAULT_PAR_N 0
61 #define DEFAULT_PAR_D 1
62 #define DEFAULT_IGNORE_ALPHA TRUE
67 PROP_FORCE_ASPECT_RATIO,
68 PROP_PIXEL_ASPECT_RATIO,
72 struct _GtkGstGLWidgetPrivate
77 gboolean force_aspect_ratio;
79 gboolean ignore_alpha;
92 GstGLDisplay *display;
93 GdkGLContext *gdk_context;
94 GstGLContext *other_context;
95 GstGLContext *context;
104 /* Pending queued idles callback */
110 gtk_gst_gl_widget_get_preferred_width (GtkWidget * widget, gint * min,
113 GtkGstGLWidget *gst_widget = (GtkGstGLWidget *) widget;
114 gint video_width = gst_widget->priv->display_width;
116 if (!gst_widget->priv->negotiated)
122 *natural = video_width;
126 gtk_gst_gl_widget_get_preferred_height (GtkWidget * widget, gint * min,
129 GtkGstGLWidget *gst_widget = (GtkGstGLWidget *) widget;
130 gint video_height = gst_widget->priv->display_height;
132 if (!gst_widget->priv->negotiated)
138 *natural = video_height;
141 static const GLfloat vertices[] = {
142 1.0f, 1.0f, 0.0f, 1.0f, 0.0f,
143 -1.0f, 1.0f, 0.0f, 0.0f, 0.0f,
144 -1.0f, -1.0f, 0.0f, 0.0f, 1.0f,
145 1.0f, -1.0f, 0.0f, 1.0f, 1.0f
149 gtk_gst_gl_widget_bind_buffer (GtkGstGLWidget * gst_widget)
151 const GstGLFuncs *gl = gst_widget->priv->context->gl_vtable;
153 gl->BindBuffer (GL_ARRAY_BUFFER, gst_widget->priv->vertex_buffer);
155 /* Load the vertex position */
156 gl->VertexAttribPointer (gst_widget->priv->attr_position, 3, GL_FLOAT,
157 GL_FALSE, 5 * sizeof (GLfloat), (void *) 0);
159 /* Load the texture coordinate */
160 gl->VertexAttribPointer (gst_widget->priv->attr_texture, 2, GL_FLOAT,
161 GL_FALSE, 5 * sizeof (GLfloat), (void *) (3 * sizeof (GLfloat)));
163 gl->EnableVertexAttribArray (gst_widget->priv->attr_position);
164 gl->EnableVertexAttribArray (gst_widget->priv->attr_texture);
168 gtk_gst_gl_widget_unbind_buffer (GtkGstGLWidget * gst_widget)
170 const GstGLFuncs *gl = gst_widget->priv->context->gl_vtable;
172 gl->BindBuffer (GL_ARRAY_BUFFER, 0);
174 gl->DisableVertexAttribArray (gst_widget->priv->attr_position);
175 gl->DisableVertexAttribArray (gst_widget->priv->attr_texture);
179 gtk_gst_gl_widget_init_redisplay (GtkGstGLWidget * gst_widget)
181 const GstGLFuncs *gl = gst_widget->priv->context->gl_vtable;
183 gst_widget->priv->shader = gst_gl_shader_new (gst_widget->priv->context);
185 gst_gl_shader_compile_with_default_vf_and_check
186 (gst_widget->priv->shader, &gst_widget->priv->attr_position,
187 &gst_widget->priv->attr_texture);
189 if (gl->GenVertexArrays) {
190 gl->GenVertexArrays (1, &gst_widget->priv->vao);
191 gl->BindVertexArray (gst_widget->priv->vao);
194 gl->GenBuffers (1, &gst_widget->priv->vertex_buffer);
195 gl->BindBuffer (GL_ARRAY_BUFFER, gst_widget->priv->vertex_buffer);
196 gl->BufferData (GL_ARRAY_BUFFER, 4 * 5 * sizeof (GLfloat), vertices,
199 if (gl->GenVertexArrays) {
200 gtk_gst_gl_widget_bind_buffer (gst_widget);
201 gl->BindVertexArray (0);
204 gl->BindBuffer (GL_ARRAY_BUFFER, 0);
206 gst_widget->priv->initted = TRUE;
210 _redraw_texture (GtkGstGLWidget * gst_widget, guint tex)
212 const GstGLFuncs *gl = gst_widget->priv->context->gl_vtable;
213 const GLushort indices[] = { 0, 1, 2, 0, 2, 3 };
215 if (gst_widget->priv->force_aspect_ratio) {
216 GstVideoRectangle src, dst, result;
217 gint widget_width, widget_height, widget_scale;
219 gl->ClearColor (0.0, 0.0, 0.0, 0.0);
220 gl->Clear (GL_COLOR_BUFFER_BIT);
222 widget_scale = gtk_widget_get_scale_factor ((GtkWidget *) gst_widget);
223 widget_width = gtk_widget_get_allocated_width ((GtkWidget *) gst_widget);
224 widget_height = gtk_widget_get_allocated_height ((GtkWidget *) gst_widget);
228 src.w = gst_widget->priv->display_width;
229 src.h = gst_widget->priv->display_height;
233 dst.w = widget_width * widget_scale;
234 dst.h = widget_height * widget_scale;
236 gst_video_sink_center_rect (src, dst, &result, TRUE);
238 gl->Viewport (result.x, result.y, result.w, result.h);
241 gst_gl_shader_use (gst_widget->priv->shader);
243 if (gl->BindVertexArray)
244 gl->BindVertexArray (gst_widget->priv->vao);
246 gtk_gst_gl_widget_bind_buffer (gst_widget);
248 gl->ActiveTexture (GL_TEXTURE0);
249 gl->BindTexture (GL_TEXTURE_2D, tex);
250 gst_gl_shader_set_uniform_1i (gst_widget->priv->shader, "tex", 0);
252 gl->DrawElements (GL_TRIANGLES, 6, GL_UNSIGNED_SHORT, indices);
254 if (gl->BindVertexArray)
255 gl->BindVertexArray (0);
257 gtk_gst_gl_widget_unbind_buffer (gst_widget);
259 gl->BindTexture (GL_TEXTURE_2D, 0);
263 gtk_gst_gl_widget_render (GtkGLArea * widget, GdkGLContext * context)
265 GtkGstGLWidget *gst_widget = (GtkGstGLWidget *) widget;
267 g_mutex_lock (&gst_widget->priv->lock);
269 if (!gst_widget->priv->initted && gst_widget->priv->context)
270 gtk_gst_gl_widget_init_redisplay (gst_widget);
272 if (gst_widget->priv->initted && gst_widget->priv->negotiated
273 && gst_widget->priv->buffer) {
274 GST_DEBUG ("rendering buffer %p with gdk context %p",
275 gst_widget->priv->buffer, context);
277 gst_gl_context_activate (gst_widget->priv->other_context, TRUE);
279 if (gst_widget->priv->new_buffer || gst_widget->priv->current_tex == 0) {
280 GstVideoFrame gl_frame;
281 GstGLSyncMeta *sync_meta;
283 if (!gst_video_frame_map (&gl_frame, &gst_widget->priv->v_info,
284 gst_widget->priv->buffer, GST_MAP_READ | GST_MAP_GL)) {
288 sync_meta = gst_buffer_get_gl_sync_meta (gst_widget->priv->buffer);
290 gst_gl_sync_meta_set_sync_point (sync_meta, gst_widget->priv->context);
291 gst_gl_sync_meta_wait (sync_meta, gst_widget->priv->other_context);
294 gst_widget->priv->current_tex = *(guint *) gl_frame.data[0];
296 gst_video_frame_unmap (&gl_frame);
299 _redraw_texture (gst_widget, gst_widget->priv->current_tex);
300 gst_widget->priv->new_buffer = FALSE;
303 /* FIXME: nothing to display */
304 glClearColor (0.0, 0.0, 0.0, 0.0);
305 glClear (GL_COLOR_BUFFER_BIT);
308 if (gst_widget->priv->other_context)
309 gst_gl_context_activate (gst_widget->priv->other_context, FALSE);
311 g_mutex_unlock (&gst_widget->priv->lock);
315 typedef void (*ThreadFunc) (gpointer data);
317 struct invoke_context
327 _invoke_func (struct invoke_context *info)
329 g_mutex_lock (&info->lock);
330 info->func (info->data);
332 g_cond_signal (&info->cond);
333 g_mutex_unlock (&info->lock);
335 return G_SOURCE_REMOVE;
339 _invoke_on_main (ThreadFunc func, gpointer data)
341 GMainContext *main_context = g_main_context_default ();
342 struct invoke_context info;
344 g_mutex_init (&info.lock);
345 g_cond_init (&info.cond);
350 g_main_context_invoke (main_context, (GSourceFunc) _invoke_func, &info);
352 g_mutex_lock (&info.lock);
354 g_cond_wait (&info.cond, &info.lock);
355 g_mutex_unlock (&info.lock);
357 g_mutex_clear (&info.lock);
358 g_cond_clear (&info.cond);
362 _reset_gl (GtkGstGLWidget * gst_widget)
364 const GstGLFuncs *gl = gst_widget->priv->other_context->gl_vtable;
366 if (!gst_widget->priv->gdk_context)
367 gst_widget->priv->gdk_context =
368 gtk_gl_area_get_context (GTK_GL_AREA (gst_widget));
369 if (gst_widget->priv->gdk_context == NULL)
372 gdk_gl_context_make_current (gst_widget->priv->gdk_context);
373 gst_gl_context_activate (gst_widget->priv->other_context, TRUE);
375 if (gst_widget->priv->vao) {
376 gl->DeleteVertexArrays (1, &gst_widget->priv->vao);
377 gst_widget->priv->vao = 0;
380 if (gst_widget->priv->vertex_buffer) {
381 gl->DeleteBuffers (1, &gst_widget->priv->vertex_buffer);
382 gst_widget->priv->vertex_buffer = 0;
385 if (gst_widget->priv->upload) {
386 gst_object_unref (gst_widget->priv->upload);
387 gst_widget->priv->upload = NULL;
390 if (gst_widget->priv->shader) {
391 gst_object_unref (gst_widget->priv->shader);
392 gst_widget->priv->shader = NULL;
395 gst_gl_context_activate (gst_widget->priv->other_context, FALSE);
397 gst_object_unref (gst_widget->priv->other_context);
398 gst_widget->priv->other_context = NULL;
400 gdk_gl_context_clear_current ();
402 g_object_unref (gst_widget->priv->gdk_context);
403 gst_widget->priv->gdk_context = NULL;
407 _reset (GtkGstGLWidget * gst_widget)
409 gst_buffer_replace (&gst_widget->priv->buffer, NULL);
411 gst_caps_replace (&gst_widget->priv->caps, NULL);
412 gst_caps_replace (&gst_widget->priv->gl_caps, NULL);
414 gst_widget->priv->negotiated = FALSE;
415 gst_widget->priv->initted = FALSE;
416 gst_widget->priv->vao = 0;
417 gst_widget->priv->vertex_buffer = 0;
418 gst_widget->priv->attr_position = 0;
419 gst_widget->priv->attr_texture = 0;
420 gst_widget->priv->current_tex = 0;
421 gst_widget->priv->new_buffer = TRUE;
425 gtk_gst_gl_widget_finalize (GObject * object)
427 GtkGstGLWidget *widget = GTK_GST_GL_WIDGET_CAST (object);
429 g_mutex_clear (&widget->priv->lock);
433 if (widget->priv->other_context) {
434 _invoke_on_main ((ThreadFunc) _reset_gl, widget);
437 if (widget->priv->context)
438 gst_object_unref (widget->priv->context);
440 if (widget->priv->display)
441 gst_object_unref (widget->priv->display);
443 if (widget->priv->draw_id)
444 g_source_remove (widget->priv->draw_id);
446 if (widget->priv->resize_id)
447 g_source_remove (widget->priv->resize_id);
449 G_OBJECT_CLASS (gtk_gst_gl_widget_parent_class)->finalize (object);
453 gtk_gst_gl_widget_set_property (GObject * object, guint prop_id,
454 const GValue * value, GParamSpec * pspec)
456 GtkGstGLWidget *gtk_widget = GTK_GST_GL_WIDGET (object);
459 case PROP_FORCE_ASPECT_RATIO:
460 gtk_widget->priv->force_aspect_ratio = g_value_get_boolean (value);
462 case PROP_PIXEL_ASPECT_RATIO:
463 gtk_widget->priv->par_n = gst_value_get_fraction_numerator (value);
464 gtk_widget->priv->par_d = gst_value_get_fraction_denominator (value);
466 case PROP_IGNORE_ALPHA:
467 gtk_widget->priv->ignore_alpha = g_value_get_boolean (value);
468 gtk_gl_area_set_has_alpha ((GtkGLArea *) gtk_widget,
469 !gtk_widget->priv->ignore_alpha);
472 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
478 gtk_gst_gl_widget_get_property (GObject * object, guint prop_id, GValue * value,
481 GtkGstGLWidget *gtk_widget = GTK_GST_GL_WIDGET (object);
484 case PROP_FORCE_ASPECT_RATIO:
485 g_value_set_boolean (value, gtk_widget->priv->force_aspect_ratio);
487 case PROP_PIXEL_ASPECT_RATIO:
488 gst_value_set_fraction (value, gtk_widget->priv->par_n,
489 gtk_widget->priv->par_d);
491 case PROP_IGNORE_ALPHA:
492 g_value_set_boolean (value, gtk_widget->priv->ignore_alpha);
495 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
501 gtk_gst_gl_widget_class_init (GtkGstGLWidgetClass * klass)
503 GObjectClass *gobject_klass = (GObjectClass *) klass;
504 GtkWidgetClass *widget_klass = (GtkWidgetClass *) klass;
505 GtkGLAreaClass *gl_widget_klass = (GtkGLAreaClass *) klass;
507 g_type_class_add_private (klass, sizeof (GtkGstGLWidgetPrivate));
509 gobject_klass->set_property = gtk_gst_gl_widget_set_property;
510 gobject_klass->get_property = gtk_gst_gl_widget_get_property;
511 gobject_klass->finalize = gtk_gst_gl_widget_finalize;
513 g_object_class_install_property (gobject_klass, PROP_FORCE_ASPECT_RATIO,
514 g_param_spec_boolean ("force-aspect-ratio",
515 "Force aspect ratio",
516 "When enabled, scaling will respect original aspect ratio",
517 DEFAULT_FORCE_ASPECT_RATIO,
518 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
520 g_object_class_install_property (gobject_klass, PROP_PIXEL_ASPECT_RATIO,
521 gst_param_spec_fraction ("pixel-aspect-ratio", "Pixel Aspect Ratio",
522 "The pixel aspect ratio of the device", DEFAULT_PAR_N, DEFAULT_PAR_D,
523 G_MAXINT, 1, 1, 1, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
525 g_object_class_install_property (gobject_klass, PROP_IGNORE_ALPHA,
526 g_param_spec_boolean ("ignore-alpha", "Ignore Alpha",
527 "When enabled, alpha will be ignored and converted to black",
528 DEFAULT_IGNORE_ALPHA, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
530 gl_widget_klass->render = gtk_gst_gl_widget_render;
532 widget_klass->get_preferred_width = gtk_gst_gl_widget_get_preferred_width;
533 widget_klass->get_preferred_height = gtk_gst_gl_widget_get_preferred_height;
537 gtk_gst_gl_widget_init (GtkGstGLWidget * widget)
541 widget->priv = GTK_GST_GL_WIDGET_GET_PRIVATE (widget);
543 widget->priv->force_aspect_ratio = DEFAULT_FORCE_ASPECT_RATIO;
544 widget->priv->par_n = DEFAULT_PAR_N;
545 widget->priv->par_d = DEFAULT_PAR_D;
546 widget->priv->ignore_alpha = DEFAULT_IGNORE_ALPHA;
548 g_mutex_init (&widget->priv->lock);
550 display = gdk_display_get_default ();
552 #if GST_GL_HAVE_WINDOW_X11 && defined (GDK_WINDOWING_X11)
553 if (GDK_IS_X11_DISPLAY (display))
554 widget->priv->display = (GstGLDisplay *)
555 gst_gl_display_x11_new_with_display (gdk_x11_display_get_xdisplay
558 #if GST_GL_HAVE_WINDOW_WAYLAND && defined (GDK_WINDOWING_WAYLAND)
559 if (GDK_IS_WAYLAND_DISPLAY (display)) {
560 struct wl_display *wayland_display =
561 gdk_wayland_display_get_wl_display (display);
562 widget->priv->display = (GstGLDisplay *)
563 gst_gl_display_wayland_new_with_display (wayland_display);
569 if (!widget->priv->display)
570 widget->priv->display = gst_gl_display_new ();
572 gtk_gl_area_set_has_alpha ((GtkGLArea *) widget, !widget->priv->ignore_alpha);
576 gtk_gst_gl_widget_new (void)
578 return (GtkWidget *) g_object_new (GTK_TYPE_GST_GL_WIDGET, NULL);
582 _queue_draw (GtkGstGLWidget * widget)
584 g_mutex_lock (&widget->priv->lock);
585 widget->priv->draw_id = 0;
586 g_mutex_unlock (&widget->priv->lock);
588 gtk_widget_queue_draw (GTK_WIDGET (widget));
590 return G_SOURCE_REMOVE;
594 gtk_gst_gl_widget_set_buffer (GtkGstGLWidget * widget, GstBuffer * buffer)
596 g_return_if_fail (GTK_IS_GST_GL_WIDGET (widget));
597 g_return_if_fail (buffer == NULL || widget->priv->negotiated);
599 g_mutex_lock (&widget->priv->lock);
601 gst_buffer_replace (&widget->priv->buffer, buffer);
602 widget->priv->new_buffer = TRUE;
604 if (!widget->priv->draw_id) {
605 widget->priv->draw_id = g_idle_add_full (G_PRIORITY_DEFAULT,
606 (GSourceFunc) _queue_draw, widget, NULL);
609 g_mutex_unlock (&widget->priv->lock);
613 _get_gl_context (GtkGstGLWidget * gst_widget)
615 GstGLPlatform platform;
619 gtk_widget_realize (GTK_WIDGET (gst_widget));
621 if (gst_widget->priv->gdk_context)
622 g_object_unref (gst_widget->priv->gdk_context);
623 gst_widget->priv->gdk_context =
624 gtk_gl_area_get_context (GTK_GL_AREA (gst_widget));
625 if (gst_widget->priv->gdk_context == NULL) {
626 g_assert_not_reached ();
630 g_object_ref (gst_widget->priv->gdk_context);
632 gdk_gl_context_make_current (gst_widget->priv->gdk_context);
634 #if GST_GL_HAVE_WINDOW_X11 && defined (GDK_WINDOWING_X11)
635 if (GST_IS_GL_DISPLAY_X11 (gst_widget->priv->display)) {
636 platform = GST_GL_PLATFORM_GLX;
637 gl_api = gst_gl_context_get_current_gl_api (NULL, NULL);
638 gl_handle = gst_gl_context_get_current_gl_context (platform);
640 gst_widget->priv->other_context =
641 gst_gl_context_new_wrapped (gst_widget->priv->display, gl_handle,
645 #if GST_GL_HAVE_WINDOW_WAYLAND && defined (GDK_WINDOWING_WAYLAND)
646 if (GST_IS_GL_DISPLAY_WAYLAND (gst_widget->priv->display)) {
647 platform = GST_GL_PLATFORM_EGL;
648 gl_api = gst_gl_context_get_current_gl_api (NULL, NULL);
649 gl_handle = gst_gl_context_get_current_gl_context (platform);
651 gst_widget->priv->other_context =
652 gst_gl_context_new_wrapped (gst_widget->priv->display, gl_handle,
661 if (gst_widget->priv->other_context) {
662 GError *error = NULL;
664 gst_gl_context_activate (gst_widget->priv->other_context, TRUE);
665 if (!gst_gl_context_fill_info (gst_widget->priv->other_context, &error)) {
666 GST_ERROR ("failed to retreive gdk context info: %s", error->message);
667 g_object_unref (gst_widget->priv->other_context);
668 gst_widget->priv->other_context = NULL;
670 gst_gl_context_activate (gst_widget->priv->other_context, FALSE);
676 _queue_resize (GtkGstGLWidget * widget)
678 g_mutex_lock (&widget->priv->lock);
679 widget->priv->resize_id = 0;
680 g_mutex_unlock (&widget->priv->lock);
682 gtk_widget_queue_resize (GTK_WIDGET (widget));
684 return G_SOURCE_REMOVE;
688 gtk_gst_gl_widget_init_winsys (GtkGstGLWidget * widget)
690 g_return_val_if_fail (GTK_IS_GST_GL_WIDGET (widget), FALSE);
692 g_mutex_lock (&widget->priv->lock);
694 if (widget->priv->display && widget->priv->gdk_context
695 && widget->priv->other_context) {
696 g_mutex_unlock (&widget->priv->lock);
700 if (!widget->priv->other_context) {
701 g_mutex_unlock (&widget->priv->lock);
702 _invoke_on_main ((ThreadFunc) _get_gl_context, widget);
703 g_mutex_lock (&widget->priv->lock);
706 if (!GST_GL_IS_CONTEXT (widget->priv->other_context)) {
707 g_mutex_unlock (&widget->priv->lock);
711 widget->priv->context = gst_gl_context_new (widget->priv->display);
713 if (!widget->priv->context) {
714 g_mutex_unlock (&widget->priv->lock);
718 gst_gl_context_create (widget->priv->context, widget->priv->other_context,
721 g_mutex_unlock (&widget->priv->lock);
726 _calculate_par (GtkGstGLWidget * widget, GstVideoInfo * info)
731 gint display_par_n, display_par_d;
732 guint display_ratio_num, display_ratio_den;
734 width = GST_VIDEO_INFO_WIDTH (info);
735 height = GST_VIDEO_INFO_HEIGHT (info);
737 par_n = GST_VIDEO_INFO_PAR_N (info);
738 par_d = GST_VIDEO_INFO_PAR_D (info);
743 /* get display's PAR */
744 if (widget->priv->par_n != 0 && widget->priv->par_d != 0) {
745 display_par_n = widget->priv->par_n;
746 display_par_d = widget->priv->par_d;
752 ok = gst_video_calculate_display_ratio (&display_ratio_num,
753 &display_ratio_den, width, height, par_n, par_d, display_par_n,
759 GST_LOG ("PAR: %u/%u DAR:%u/%u", par_n, par_d, display_par_n, display_par_d);
761 if (height % display_ratio_den == 0) {
762 GST_DEBUG ("keeping video height");
763 widget->priv->display_width = (guint)
764 gst_util_uint64_scale_int (height, display_ratio_num,
766 widget->priv->display_height = height;
767 } else if (width % display_ratio_num == 0) {
768 GST_DEBUG ("keeping video width");
769 widget->priv->display_width = width;
770 widget->priv->display_height = (guint)
771 gst_util_uint64_scale_int (width, display_ratio_den, display_ratio_num);
773 GST_DEBUG ("approximating while keeping video height");
774 widget->priv->display_width = (guint)
775 gst_util_uint64_scale_int (height, display_ratio_num,
777 widget->priv->display_height = height;
779 GST_DEBUG ("scaling to %dx%d", widget->priv->display_width,
780 widget->priv->display_height);
786 gtk_gst_gl_widget_set_caps (GtkGstGLWidget * widget, GstCaps * caps)
790 g_return_val_if_fail (GTK_IS_GST_GL_WIDGET (widget), FALSE);
791 g_return_val_if_fail (GST_IS_CAPS (caps), FALSE);
792 g_return_val_if_fail (gst_caps_is_fixed (caps), FALSE);
794 if (widget->priv->caps && gst_caps_is_equal_fixed (widget->priv->caps, caps))
797 if (!gst_video_info_from_caps (&v_info, caps))
800 g_mutex_lock (&widget->priv->lock);
804 gst_caps_replace (&widget->priv->caps, caps);
806 widget->priv->gl_caps = gst_video_info_to_caps (&v_info);
807 gst_caps_set_features (widget->priv->gl_caps, 0,
808 gst_caps_features_from_string (GST_CAPS_FEATURE_MEMORY_GL_MEMORY));
810 if (!_calculate_par (widget, &v_info)) {
811 g_mutex_unlock (&widget->priv->lock);
815 widget->priv->v_info = v_info;
816 widget->priv->negotiated = TRUE;
818 if (!widget->priv->resize_id) {
819 widget->priv->resize_id = g_idle_add_full (G_PRIORITY_DEFAULT,
820 (GSourceFunc) _queue_resize, widget, NULL);
823 g_mutex_unlock (&widget->priv->lock);
829 gtk_gst_gl_widget_get_gtk_context (GtkGstGLWidget * gst_widget)
831 if (!gst_widget->priv->other_context)
834 return gst_object_ref (gst_widget->priv->other_context);
838 gtk_gst_gl_widget_get_context (GtkGstGLWidget * gst_widget)
840 if (!gst_widget->priv->context)
843 return gst_object_ref (gst_widget->priv->context);
847 gtk_gst_gl_widget_get_display (GtkGstGLWidget * gst_widget)
849 if (!gst_widget->priv->display)
852 return gst_object_ref (gst_widget->priv->display);