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;
91 GstGLDisplay *display;
92 GdkGLContext *gdk_context;
93 GstGLContext *other_context;
94 GstGLContext *context;
103 /* Pending queued idles callback */
109 gtk_gst_gl_widget_get_preferred_width (GtkWidget * widget, gint * min,
112 GtkGstGLWidget *gst_widget = (GtkGstGLWidget *) widget;
113 gint video_width = gst_widget->priv->display_width;
115 if (!gst_widget->priv->negotiated)
121 *natural = video_width;
125 gtk_gst_gl_widget_get_preferred_height (GtkWidget * widget, gint * min,
128 GtkGstGLWidget *gst_widget = (GtkGstGLWidget *) widget;
129 gint video_height = gst_widget->priv->display_height;
131 if (!gst_widget->priv->negotiated)
137 *natural = video_height;
140 static const GLfloat vertices[] = {
141 1.0f, 1.0f, 0.0f, 1.0f, 0.0f,
142 -1.0f, 1.0f, 0.0f, 0.0f, 0.0f,
143 -1.0f, -1.0f, 0.0f, 0.0f, 1.0f,
144 1.0f, -1.0f, 0.0f, 1.0f, 1.0f
148 gtk_gst_gl_widget_bind_buffer (GtkGstGLWidget * gst_widget)
150 const GstGLFuncs *gl = gst_widget->priv->context->gl_vtable;
152 gl->BindBuffer (GL_ARRAY_BUFFER, gst_widget->priv->vertex_buffer);
154 /* Load the vertex position */
155 gl->VertexAttribPointer (gst_widget->priv->attr_position, 3, GL_FLOAT,
156 GL_FALSE, 5 * sizeof (GLfloat), (void *) 0);
158 /* Load the texture coordinate */
159 gl->VertexAttribPointer (gst_widget->priv->attr_texture, 2, GL_FLOAT,
160 GL_FALSE, 5 * sizeof (GLfloat), (void *) (3 * sizeof (GLfloat)));
162 gl->EnableVertexAttribArray (gst_widget->priv->attr_position);
163 gl->EnableVertexAttribArray (gst_widget->priv->attr_texture);
167 gtk_gst_gl_widget_unbind_buffer (GtkGstGLWidget * gst_widget)
169 const GstGLFuncs *gl = gst_widget->priv->context->gl_vtable;
171 gl->BindBuffer (GL_ARRAY_BUFFER, 0);
173 gl->DisableVertexAttribArray (gst_widget->priv->attr_position);
174 gl->DisableVertexAttribArray (gst_widget->priv->attr_texture);
178 gtk_gst_gl_widget_init_redisplay (GtkGstGLWidget * gst_widget)
180 const GstGLFuncs *gl = gst_widget->priv->context->gl_vtable;
182 gst_widget->priv->shader = gst_gl_shader_new (gst_widget->priv->context);
184 gst_gl_shader_compile_with_default_vf_and_check
185 (gst_widget->priv->shader, &gst_widget->priv->attr_position,
186 &gst_widget->priv->attr_texture);
188 if (gl->GenVertexArrays) {
189 gl->GenVertexArrays (1, &gst_widget->priv->vao);
190 gl->BindVertexArray (gst_widget->priv->vao);
193 gl->GenBuffers (1, &gst_widget->priv->vertex_buffer);
194 gl->BindBuffer (GL_ARRAY_BUFFER, gst_widget->priv->vertex_buffer);
195 gl->BufferData (GL_ARRAY_BUFFER, 4 * 5 * sizeof (GLfloat), vertices,
198 if (gl->GenVertexArrays) {
199 gtk_gst_gl_widget_bind_buffer (gst_widget);
200 gl->BindVertexArray (0);
203 gl->BindBuffer (GL_ARRAY_BUFFER, 0);
205 gst_widget->priv->initted = TRUE;
209 _redraw_texture (GtkGstGLWidget * gst_widget, guint tex)
211 const GstGLFuncs *gl = gst_widget->priv->context->gl_vtable;
212 const GLushort indices[] = { 0, 1, 2, 0, 2, 3 };
214 if (gst_widget->priv->force_aspect_ratio) {
215 GstVideoRectangle src, dst, result;
216 gint widget_width, widget_height, widget_scale;
218 gl->ClearColor (0.0, 0.0, 0.0, 0.0);
219 gl->Clear (GL_COLOR_BUFFER_BIT);
221 widget_scale = gtk_widget_get_scale_factor ((GtkWidget *) gst_widget);
222 widget_width = gtk_widget_get_allocated_width ((GtkWidget *) gst_widget);
223 widget_height = gtk_widget_get_allocated_height ((GtkWidget *) gst_widget);
227 src.w = gst_widget->priv->display_width;
228 src.h = gst_widget->priv->display_height;
232 dst.w = widget_width * widget_scale;
233 dst.h = widget_height * widget_scale;
235 gst_video_sink_center_rect (src, dst, &result, TRUE);
237 gl->Viewport (result.x, result.y, result.w, result.h);
240 gst_gl_shader_use (gst_widget->priv->shader);
242 if (gl->BindVertexArray)
243 gl->BindVertexArray (gst_widget->priv->vao);
245 gtk_gst_gl_widget_bind_buffer (gst_widget);
247 gl->ActiveTexture (GL_TEXTURE0);
248 gl->BindTexture (GL_TEXTURE_2D, tex);
249 gst_gl_shader_set_uniform_1i (gst_widget->priv->shader, "tex", 0);
251 gl->DrawElements (GL_TRIANGLES, 6, GL_UNSIGNED_SHORT, indices);
253 if (gl->BindVertexArray)
254 gl->BindVertexArray (0);
256 gtk_gst_gl_widget_unbind_buffer (gst_widget);
258 gl->BindTexture (GL_TEXTURE_2D, 0);
262 gtk_gst_gl_widget_render (GtkGLArea * widget, GdkGLContext * context)
264 GtkGstGLWidget *gst_widget = (GtkGstGLWidget *) widget;
266 g_mutex_lock (&gst_widget->priv->lock);
268 if (!gst_widget->priv->initted && gst_widget->priv->context)
269 gtk_gst_gl_widget_init_redisplay (gst_widget);
271 if (gst_widget->priv->initted && gst_widget->priv->negotiated
272 && gst_widget->priv->buffer) {
273 GST_DEBUG ("rendering buffer %p with gdk context %p",
274 gst_widget->priv->buffer, context);
276 gst_gl_context_activate (gst_widget->priv->other_context, TRUE);
278 if (gst_widget->priv->new_buffer || gst_widget->priv->current_tex == 0) {
279 GstVideoFrame gl_frame;
280 GstGLSyncMeta *sync_meta;
282 if (!gst_video_frame_map (&gl_frame, &gst_widget->priv->v_info,
283 gst_widget->priv->buffer, GST_MAP_READ | GST_MAP_GL)) {
287 sync_meta = gst_buffer_get_gl_sync_meta (gst_widget->priv->buffer);
289 gst_gl_sync_meta_set_sync_point (sync_meta, gst_widget->priv->context);
290 gst_gl_sync_meta_wait (sync_meta, gst_widget->priv->other_context);
293 gst_widget->priv->current_tex = *(guint *) gl_frame.data[0];
295 gst_video_frame_unmap (&gl_frame);
298 _redraw_texture (gst_widget, gst_widget->priv->current_tex);
299 gst_widget->priv->new_buffer = FALSE;
302 /* FIXME: nothing to display */
303 glClearColor (0.0, 0.0, 0.0, 0.0);
304 glClear (GL_COLOR_BUFFER_BIT);
307 if (gst_widget->priv->other_context)
308 gst_gl_context_activate (gst_widget->priv->other_context, FALSE);
310 g_mutex_unlock (&gst_widget->priv->lock);
314 typedef void (*ThreadFunc) (gpointer data);
316 struct invoke_context
326 _invoke_func (struct invoke_context *info)
328 g_mutex_lock (&info->lock);
329 info->func (info->data);
331 g_cond_signal (&info->cond);
332 g_mutex_unlock (&info->lock);
334 return G_SOURCE_REMOVE;
338 _invoke_on_main (ThreadFunc func, gpointer data)
340 GMainContext *main_context = g_main_context_default ();
341 struct invoke_context info;
343 g_mutex_init (&info.lock);
344 g_cond_init (&info.cond);
349 g_main_context_invoke (main_context, (GSourceFunc) _invoke_func, &info);
351 g_mutex_lock (&info.lock);
353 g_cond_wait (&info.cond, &info.lock);
354 g_mutex_unlock (&info.lock);
356 g_mutex_clear (&info.lock);
357 g_cond_clear (&info.cond);
361 _reset_gl (GtkGstGLWidget * gst_widget)
363 const GstGLFuncs *gl = gst_widget->priv->other_context->gl_vtable;
365 if (!gst_widget->priv->gdk_context)
366 gst_widget->priv->gdk_context =
367 gtk_gl_area_get_context (GTK_GL_AREA (gst_widget));
368 if (gst_widget->priv->gdk_context == NULL)
371 gdk_gl_context_make_current (gst_widget->priv->gdk_context);
372 gst_gl_context_activate (gst_widget->priv->other_context, TRUE);
374 if (gst_widget->priv->vao) {
375 gl->DeleteVertexArrays (1, &gst_widget->priv->vao);
376 gst_widget->priv->vao = 0;
379 if (gst_widget->priv->vertex_buffer) {
380 gl->DeleteBuffers (1, &gst_widget->priv->vertex_buffer);
381 gst_widget->priv->vertex_buffer = 0;
384 if (gst_widget->priv->upload) {
385 gst_object_unref (gst_widget->priv->upload);
386 gst_widget->priv->upload = NULL;
389 if (gst_widget->priv->shader) {
390 gst_object_unref (gst_widget->priv->shader);
391 gst_widget->priv->shader = NULL;
394 gst_gl_context_activate (gst_widget->priv->other_context, FALSE);
396 gst_object_unref (gst_widget->priv->other_context);
397 gst_widget->priv->other_context = NULL;
399 gdk_gl_context_clear_current ();
401 g_object_unref (gst_widget->priv->gdk_context);
402 gst_widget->priv->gdk_context = NULL;
406 _reset (GtkGstGLWidget * gst_widget)
408 gst_buffer_replace (&gst_widget->priv->buffer, NULL);
410 gst_caps_replace (&gst_widget->priv->caps, NULL);
412 gst_widget->priv->negotiated = FALSE;
413 gst_widget->priv->initted = FALSE;
414 gst_widget->priv->vao = 0;
415 gst_widget->priv->vertex_buffer = 0;
416 gst_widget->priv->attr_position = 0;
417 gst_widget->priv->attr_texture = 0;
418 gst_widget->priv->current_tex = 0;
419 gst_widget->priv->new_buffer = TRUE;
423 gtk_gst_gl_widget_finalize (GObject * object)
425 GtkGstGLWidget *widget = GTK_GST_GL_WIDGET_CAST (object);
427 g_mutex_clear (&widget->priv->lock);
431 if (widget->priv->other_context) {
432 _invoke_on_main ((ThreadFunc) _reset_gl, widget);
435 if (widget->priv->context)
436 gst_object_unref (widget->priv->context);
438 if (widget->priv->display)
439 gst_object_unref (widget->priv->display);
441 if (widget->priv->draw_id)
442 g_source_remove (widget->priv->draw_id);
444 if (widget->priv->resize_id)
445 g_source_remove (widget->priv->resize_id);
447 G_OBJECT_CLASS (gtk_gst_gl_widget_parent_class)->finalize (object);
451 gtk_gst_gl_widget_set_property (GObject * object, guint prop_id,
452 const GValue * value, GParamSpec * pspec)
454 GtkGstGLWidget *gtk_widget = GTK_GST_GL_WIDGET (object);
457 case PROP_FORCE_ASPECT_RATIO:
458 gtk_widget->priv->force_aspect_ratio = g_value_get_boolean (value);
460 case PROP_PIXEL_ASPECT_RATIO:
461 gtk_widget->priv->par_n = gst_value_get_fraction_numerator (value);
462 gtk_widget->priv->par_d = gst_value_get_fraction_denominator (value);
464 case PROP_IGNORE_ALPHA:
465 gtk_widget->priv->ignore_alpha = g_value_get_boolean (value);
466 gtk_gl_area_set_has_alpha ((GtkGLArea *) gtk_widget,
467 !gtk_widget->priv->ignore_alpha);
470 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
476 gtk_gst_gl_widget_get_property (GObject * object, guint prop_id, GValue * value,
479 GtkGstGLWidget *gtk_widget = GTK_GST_GL_WIDGET (object);
482 case PROP_FORCE_ASPECT_RATIO:
483 g_value_set_boolean (value, gtk_widget->priv->force_aspect_ratio);
485 case PROP_PIXEL_ASPECT_RATIO:
486 gst_value_set_fraction (value, gtk_widget->priv->par_n,
487 gtk_widget->priv->par_d);
489 case PROP_IGNORE_ALPHA:
490 g_value_set_boolean (value, gtk_widget->priv->ignore_alpha);
493 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
499 gtk_gst_gl_widget_class_init (GtkGstGLWidgetClass * klass)
501 GObjectClass *gobject_klass = (GObjectClass *) klass;
502 GtkWidgetClass *widget_klass = (GtkWidgetClass *) klass;
503 GtkGLAreaClass *gl_widget_klass = (GtkGLAreaClass *) klass;
505 g_type_class_add_private (klass, sizeof (GtkGstGLWidgetPrivate));
507 gobject_klass->set_property = gtk_gst_gl_widget_set_property;
508 gobject_klass->get_property = gtk_gst_gl_widget_get_property;
509 gobject_klass->finalize = gtk_gst_gl_widget_finalize;
511 g_object_class_install_property (gobject_klass, PROP_FORCE_ASPECT_RATIO,
512 g_param_spec_boolean ("force-aspect-ratio",
513 "Force aspect ratio",
514 "When enabled, scaling will respect original aspect ratio",
515 DEFAULT_FORCE_ASPECT_RATIO,
516 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
518 g_object_class_install_property (gobject_klass, PROP_PIXEL_ASPECT_RATIO,
519 gst_param_spec_fraction ("pixel-aspect-ratio", "Pixel Aspect Ratio",
520 "The pixel aspect ratio of the device", DEFAULT_PAR_N, DEFAULT_PAR_D,
521 G_MAXINT, 1, 1, 1, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
523 g_object_class_install_property (gobject_klass, PROP_IGNORE_ALPHA,
524 g_param_spec_boolean ("ignore-alpha", "Ignore Alpha",
525 "When enabled, alpha will be ignored and converted to black",
526 DEFAULT_IGNORE_ALPHA, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
528 gl_widget_klass->render = gtk_gst_gl_widget_render;
530 widget_klass->get_preferred_width = gtk_gst_gl_widget_get_preferred_width;
531 widget_klass->get_preferred_height = gtk_gst_gl_widget_get_preferred_height;
535 gtk_gst_gl_widget_init (GtkGstGLWidget * widget)
539 widget->priv = GTK_GST_GL_WIDGET_GET_PRIVATE (widget);
541 widget->priv->force_aspect_ratio = DEFAULT_FORCE_ASPECT_RATIO;
542 widget->priv->par_n = DEFAULT_PAR_N;
543 widget->priv->par_d = DEFAULT_PAR_D;
544 widget->priv->ignore_alpha = DEFAULT_IGNORE_ALPHA;
546 g_mutex_init (&widget->priv->lock);
548 display = gdk_display_get_default ();
550 #if GST_GL_HAVE_WINDOW_X11 && defined (GDK_WINDOWING_X11)
551 if (GDK_IS_X11_DISPLAY (display))
552 widget->priv->display = (GstGLDisplay *)
553 gst_gl_display_x11_new_with_display (gdk_x11_display_get_xdisplay
556 #if GST_GL_HAVE_WINDOW_WAYLAND && defined (GDK_WINDOWING_WAYLAND)
557 if (GDK_IS_WAYLAND_DISPLAY (display)) {
558 struct wl_display *wayland_display =
559 gdk_wayland_display_get_wl_display (display);
560 widget->priv->display = (GstGLDisplay *)
561 gst_gl_display_wayland_new_with_display (wayland_display);
567 if (!widget->priv->display)
568 widget->priv->display = gst_gl_display_new ();
570 gtk_gl_area_set_has_alpha ((GtkGLArea *) widget, !widget->priv->ignore_alpha);
574 gtk_gst_gl_widget_new (void)
576 return (GtkWidget *) g_object_new (GTK_TYPE_GST_GL_WIDGET, NULL);
580 _queue_draw (GtkGstGLWidget * widget)
582 g_mutex_lock (&widget->priv->lock);
583 widget->priv->draw_id = 0;
584 g_mutex_unlock (&widget->priv->lock);
586 gtk_widget_queue_draw (GTK_WIDGET (widget));
588 return G_SOURCE_REMOVE;
592 gtk_gst_gl_widget_set_buffer (GtkGstGLWidget * widget, GstBuffer * buffer)
594 g_return_if_fail (GTK_IS_GST_GL_WIDGET (widget));
595 g_return_if_fail (buffer == NULL || widget->priv->negotiated);
597 g_mutex_lock (&widget->priv->lock);
599 gst_buffer_replace (&widget->priv->buffer, buffer);
600 widget->priv->new_buffer = TRUE;
602 if (!widget->priv->draw_id) {
603 widget->priv->draw_id = g_idle_add_full (G_PRIORITY_DEFAULT,
604 (GSourceFunc) _queue_draw, widget, NULL);
607 g_mutex_unlock (&widget->priv->lock);
611 _get_gl_context (GtkGstGLWidget * gst_widget)
613 GstGLPlatform platform;
617 gtk_widget_realize (GTK_WIDGET (gst_widget));
619 if (gst_widget->priv->gdk_context)
620 g_object_unref (gst_widget->priv->gdk_context);
621 gst_widget->priv->gdk_context =
622 gtk_gl_area_get_context (GTK_GL_AREA (gst_widget));
623 if (gst_widget->priv->gdk_context == NULL) {
624 g_assert_not_reached ();
628 g_object_ref (gst_widget->priv->gdk_context);
630 gdk_gl_context_make_current (gst_widget->priv->gdk_context);
632 #if GST_GL_HAVE_WINDOW_X11 && defined (GDK_WINDOWING_X11)
633 if (GST_IS_GL_DISPLAY_X11 (gst_widget->priv->display)) {
634 platform = GST_GL_PLATFORM_GLX;
635 gl_api = gst_gl_context_get_current_gl_api (NULL, NULL);
636 gl_handle = gst_gl_context_get_current_gl_context (platform);
638 gst_widget->priv->other_context =
639 gst_gl_context_new_wrapped (gst_widget->priv->display, gl_handle,
643 #if GST_GL_HAVE_WINDOW_WAYLAND && defined (GDK_WINDOWING_WAYLAND)
644 if (GST_IS_GL_DISPLAY_WAYLAND (gst_widget->priv->display)) {
645 platform = GST_GL_PLATFORM_EGL;
646 gl_api = gst_gl_context_get_current_gl_api (NULL, NULL);
647 gl_handle = gst_gl_context_get_current_gl_context (platform);
649 gst_widget->priv->other_context =
650 gst_gl_context_new_wrapped (gst_widget->priv->display, gl_handle,
659 if (gst_widget->priv->other_context) {
660 GError *error = NULL;
662 gst_gl_context_activate (gst_widget->priv->other_context, TRUE);
663 if (!gst_gl_context_fill_info (gst_widget->priv->other_context, &error)) {
664 GST_ERROR ("failed to retreive gdk context info: %s", error->message);
665 g_object_unref (gst_widget->priv->other_context);
666 gst_widget->priv->other_context = NULL;
668 gst_gl_context_activate (gst_widget->priv->other_context, FALSE);
674 _queue_resize (GtkGstGLWidget * widget)
676 g_mutex_lock (&widget->priv->lock);
677 widget->priv->resize_id = 0;
678 g_mutex_unlock (&widget->priv->lock);
680 gtk_widget_queue_resize (GTK_WIDGET (widget));
682 return G_SOURCE_REMOVE;
686 gtk_gst_gl_widget_init_winsys (GtkGstGLWidget * widget)
688 g_return_val_if_fail (GTK_IS_GST_GL_WIDGET (widget), FALSE);
690 g_mutex_lock (&widget->priv->lock);
692 if (widget->priv->display && widget->priv->gdk_context
693 && widget->priv->other_context) {
694 g_mutex_unlock (&widget->priv->lock);
698 if (!widget->priv->other_context) {
699 g_mutex_unlock (&widget->priv->lock);
700 _invoke_on_main ((ThreadFunc) _get_gl_context, widget);
701 g_mutex_lock (&widget->priv->lock);
704 if (!GST_GL_IS_CONTEXT (widget->priv->other_context)) {
705 g_mutex_unlock (&widget->priv->lock);
709 widget->priv->context = gst_gl_context_new (widget->priv->display);
711 if (!widget->priv->context) {
712 g_mutex_unlock (&widget->priv->lock);
716 gst_gl_context_create (widget->priv->context, widget->priv->other_context,
719 g_mutex_unlock (&widget->priv->lock);
724 _calculate_par (GtkGstGLWidget * widget, GstVideoInfo * info)
729 gint display_par_n, display_par_d;
730 guint display_ratio_num, display_ratio_den;
732 width = GST_VIDEO_INFO_WIDTH (info);
733 height = GST_VIDEO_INFO_HEIGHT (info);
735 par_n = GST_VIDEO_INFO_PAR_N (info);
736 par_d = GST_VIDEO_INFO_PAR_D (info);
741 /* get display's PAR */
742 if (widget->priv->par_n != 0 && widget->priv->par_d != 0) {
743 display_par_n = widget->priv->par_n;
744 display_par_d = widget->priv->par_d;
750 ok = gst_video_calculate_display_ratio (&display_ratio_num,
751 &display_ratio_den, width, height, par_n, par_d, display_par_n,
757 GST_LOG ("PAR: %u/%u DAR:%u/%u", par_n, par_d, display_par_n, display_par_d);
759 if (height % display_ratio_den == 0) {
760 GST_DEBUG ("keeping video height");
761 widget->priv->display_width = (guint)
762 gst_util_uint64_scale_int (height, display_ratio_num,
764 widget->priv->display_height = height;
765 } else if (width % display_ratio_num == 0) {
766 GST_DEBUG ("keeping video width");
767 widget->priv->display_width = width;
768 widget->priv->display_height = (guint)
769 gst_util_uint64_scale_int (width, display_ratio_den, display_ratio_num);
771 GST_DEBUG ("approximating while keeping video height");
772 widget->priv->display_width = (guint)
773 gst_util_uint64_scale_int (height, display_ratio_num,
775 widget->priv->display_height = height;
777 GST_DEBUG ("scaling to %dx%d", widget->priv->display_width,
778 widget->priv->display_height);
784 gtk_gst_gl_widget_set_caps (GtkGstGLWidget * widget, GstCaps * caps)
788 g_return_val_if_fail (GTK_IS_GST_GL_WIDGET (widget), FALSE);
789 g_return_val_if_fail (GST_IS_CAPS (caps), FALSE);
790 g_return_val_if_fail (gst_caps_is_fixed (caps), FALSE);
792 if (widget->priv->caps && gst_caps_is_equal_fixed (widget->priv->caps, caps))
795 if (!gst_video_info_from_caps (&v_info, caps))
798 g_mutex_lock (&widget->priv->lock);
802 gst_caps_replace (&widget->priv->caps, caps);
804 if (!_calculate_par (widget, &v_info)) {
805 g_mutex_unlock (&widget->priv->lock);
809 widget->priv->v_info = v_info;
810 widget->priv->negotiated = TRUE;
812 if (!widget->priv->resize_id) {
813 widget->priv->resize_id = g_idle_add_full (G_PRIORITY_DEFAULT,
814 (GSourceFunc) _queue_resize, widget, NULL);
817 g_mutex_unlock (&widget->priv->lock);
823 gtk_gst_gl_widget_get_gtk_context (GtkGstGLWidget * gst_widget)
825 if (!gst_widget->priv->other_context)
828 return gst_object_ref (gst_widget->priv->other_context);
832 gtk_gst_gl_widget_get_context (GtkGstGLWidget * gst_widget)
834 if (!gst_widget->priv->context)
837 return gst_object_ref (gst_widget->priv->context);
841 gtk_gst_gl_widget_get_display (GtkGstGLWidget * gst_widget)
843 if (!gst_widget->priv->display)
846 return gst_object_ref (gst_widget->priv->display);