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;
106 gtk_gst_gl_widget_get_preferred_width (GtkWidget * widget, gint * min,
109 GtkGstGLWidget *gst_widget = (GtkGstGLWidget *) widget;
110 gint video_width = gst_widget->priv->display_width;
112 if (!gst_widget->priv->negotiated)
118 *natural = video_width;
122 gtk_gst_gl_widget_get_preferred_height (GtkWidget * widget, gint * min,
125 GtkGstGLWidget *gst_widget = (GtkGstGLWidget *) widget;
126 gint video_height = gst_widget->priv->display_height;
128 if (!gst_widget->priv->negotiated)
134 *natural = video_height;
137 static const GLfloat vertices[] = {
138 1.0f, 1.0f, 0.0f, 1.0f, 0.0f,
139 -1.0f, 1.0f, 0.0f, 0.0f, 0.0f,
140 -1.0f, -1.0f, 0.0f, 0.0f, 1.0f,
141 1.0f, -1.0f, 0.0f, 1.0f, 1.0f
145 gtk_gst_gl_widget_bind_buffer (GtkGstGLWidget * gst_widget)
147 const GstGLFuncs *gl = gst_widget->priv->context->gl_vtable;
149 gl->BindBuffer (GL_ARRAY_BUFFER, gst_widget->priv->vertex_buffer);
151 /* Load the vertex position */
152 gl->VertexAttribPointer (gst_widget->priv->attr_position, 3, GL_FLOAT,
153 GL_FALSE, 5 * sizeof (GLfloat), (void *) 0);
155 /* Load the texture coordinate */
156 gl->VertexAttribPointer (gst_widget->priv->attr_texture, 2, GL_FLOAT,
157 GL_FALSE, 5 * sizeof (GLfloat), (void *) (3 * sizeof (GLfloat)));
159 gl->EnableVertexAttribArray (gst_widget->priv->attr_position);
160 gl->EnableVertexAttribArray (gst_widget->priv->attr_texture);
164 gtk_gst_gl_widget_unbind_buffer (GtkGstGLWidget * gst_widget)
166 const GstGLFuncs *gl = gst_widget->priv->context->gl_vtable;
168 gl->BindBuffer (GL_ARRAY_BUFFER, 0);
170 gl->DisableVertexAttribArray (gst_widget->priv->attr_position);
171 gl->DisableVertexAttribArray (gst_widget->priv->attr_texture);
175 gtk_gst_gl_widget_init_redisplay (GtkGstGLWidget * gst_widget)
177 const GstGLFuncs *gl = gst_widget->priv->context->gl_vtable;
179 gst_widget->priv->shader = gst_gl_shader_new (gst_widget->priv->context);
181 gst_gl_shader_compile_with_default_vf_and_check
182 (gst_widget->priv->shader, &gst_widget->priv->attr_position,
183 &gst_widget->priv->attr_texture);
185 if (gl->GenVertexArrays) {
186 gl->GenVertexArrays (1, &gst_widget->priv->vao);
187 gl->BindVertexArray (gst_widget->priv->vao);
190 gl->GenBuffers (1, &gst_widget->priv->vertex_buffer);
191 gl->BindBuffer (GL_ARRAY_BUFFER, gst_widget->priv->vertex_buffer);
192 gl->BufferData (GL_ARRAY_BUFFER, 4 * 5 * sizeof (GLfloat), vertices,
195 if (gl->GenVertexArrays) {
196 gtk_gst_gl_widget_bind_buffer (gst_widget);
197 gl->BindVertexArray (0);
200 gl->BindBuffer (GL_ARRAY_BUFFER, 0);
202 gst_widget->priv->initted = TRUE;
206 _redraw_texture (GtkGstGLWidget * gst_widget, guint tex)
208 const GstGLFuncs *gl = gst_widget->priv->context->gl_vtable;
209 GLushort indices[] = { 0, 1, 2, 0, 2, 3 };
211 if (gst_widget->priv->force_aspect_ratio) {
212 GstVideoRectangle src, dst, result;
213 gint gtk_viewport[4];
215 gl->ClearColor (0.0, 0.0, 0.0, 0.0);
216 gl->Clear (GL_COLOR_BUFFER_BIT);
218 gl->GetIntegerv (GL_VIEWPORT, gtk_viewport);
222 src.w = gst_widget->priv->display_width;
223 src.h = gst_widget->priv->display_height;
225 dst.x = gtk_viewport[0];
226 dst.y = gtk_viewport[1];
227 dst.w = gtk_viewport[2];
228 dst.h = gtk_viewport[3];
230 gst_video_sink_center_rect (src, dst, &result, TRUE);
232 gl->Viewport (result.x, result.y, result.w, result.h);
235 gst_gl_shader_use (gst_widget->priv->shader);
237 if (gl->BindVertexArray)
238 gl->BindVertexArray (gst_widget->priv->vao);
240 gtk_gst_gl_widget_bind_buffer (gst_widget);
242 gl->ActiveTexture (GL_TEXTURE0);
243 gl->BindTexture (GL_TEXTURE_2D, tex);
244 gst_gl_shader_set_uniform_1i (gst_widget->priv->shader, "tex", 0);
246 gl->DrawElements (GL_TRIANGLES, 6, GL_UNSIGNED_SHORT, indices);
248 if (gl->BindVertexArray)
249 gl->BindVertexArray (0);
251 gtk_gst_gl_widget_unbind_buffer (gst_widget);
253 gl->BindTexture (GL_TEXTURE_2D, 0);
257 gtk_gst_gl_widget_render (GtkGLArea * widget, GdkGLContext * context)
259 GtkGstGLWidget *gst_widget = (GtkGstGLWidget *) widget;
261 g_mutex_lock (&gst_widget->priv->lock);
263 if (!gst_widget->priv->initted && gst_widget->priv->context)
264 gtk_gst_gl_widget_init_redisplay (gst_widget);
266 if (gst_widget->priv->initted && gst_widget->priv->negotiated
267 && gst_widget->priv->buffer) {
268 GST_DEBUG ("rendering buffer %p with gdk context %p",
269 gst_widget->priv->buffer, context);
271 gst_gl_context_activate (gst_widget->priv->other_context, TRUE);
273 if (gst_widget->priv->new_buffer || gst_widget->priv->current_tex == 0) {
274 GstVideoFrame gl_frame;
275 GstGLSyncMeta *sync_meta;
277 if (!gst_video_frame_map (&gl_frame, &gst_widget->priv->v_info,
278 gst_widget->priv->buffer, GST_MAP_READ | GST_MAP_GL)) {
282 sync_meta = gst_buffer_get_gl_sync_meta (gst_widget->priv->buffer);
284 gst_gl_sync_meta_set_sync_point (sync_meta, gst_widget->priv->context);
285 gst_gl_sync_meta_wait (sync_meta, gst_widget->priv->other_context);
288 gst_widget->priv->current_tex = *(guint *) gl_frame.data[0];
290 gst_video_frame_unmap (&gl_frame);
293 _redraw_texture (gst_widget, gst_widget->priv->current_tex);
294 gst_widget->priv->new_buffer = FALSE;
297 /* FIXME: nothing to display */
298 glClearColor (0.0, 0.0, 0.0, 0.0);
299 glClear (GL_COLOR_BUFFER_BIT);
302 if (gst_widget->priv->other_context)
303 gst_gl_context_activate (gst_widget->priv->other_context, FALSE);
305 g_mutex_unlock (&gst_widget->priv->lock);
309 typedef void (*ThreadFunc) (gpointer data);
311 struct invoke_context
321 _invoke_func (struct invoke_context *info)
323 g_mutex_lock (&info->lock);
324 info->func (info->data);
326 g_cond_signal (&info->cond);
327 g_mutex_unlock (&info->lock);
329 return G_SOURCE_REMOVE;
333 _invoke_on_main (ThreadFunc func, gpointer data)
335 GMainContext *main_context = g_main_context_default ();
336 struct invoke_context info;
338 g_mutex_init (&info.lock);
339 g_cond_init (&info.cond);
344 g_main_context_invoke (main_context, (GSourceFunc) _invoke_func, &info);
346 g_mutex_lock (&info.lock);
348 g_cond_wait (&info.cond, &info.lock);
349 g_mutex_unlock (&info.lock);
351 g_mutex_clear (&info.lock);
352 g_cond_clear (&info.cond);
356 _reset_gl (GtkGstGLWidget * gst_widget)
358 const GstGLFuncs *gl = gst_widget->priv->other_context->gl_vtable;
360 if (!gst_widget->priv->gdk_context)
361 gst_widget->priv->gdk_context =
362 gtk_gl_area_get_context (GTK_GL_AREA (gst_widget));
363 if (gst_widget->priv->gdk_context == NULL)
366 gdk_gl_context_make_current (gst_widget->priv->gdk_context);
367 gst_gl_context_activate (gst_widget->priv->other_context, TRUE);
369 if (gst_widget->priv->vao) {
370 gl->DeleteVertexArrays (1, &gst_widget->priv->vao);
371 gst_widget->priv->vao = 0;
374 if (gst_widget->priv->vertex_buffer) {
375 gl->DeleteBuffers (1, &gst_widget->priv->vertex_buffer);
376 gst_widget->priv->vertex_buffer = 0;
379 if (gst_widget->priv->upload) {
380 gst_object_unref (gst_widget->priv->upload);
381 gst_widget->priv->upload = NULL;
384 if (gst_widget->priv->shader) {
385 gst_object_unref (gst_widget->priv->shader);
386 gst_widget->priv->shader = NULL;
389 gst_gl_context_activate (gst_widget->priv->other_context, FALSE);
391 gst_object_unref (gst_widget->priv->other_context);
392 gst_widget->priv->other_context = NULL;
394 gdk_gl_context_clear_current ();
396 g_object_unref (gst_widget->priv->gdk_context);
397 gst_widget->priv->gdk_context = NULL;
401 _reset (GtkGstGLWidget * gst_widget)
403 gst_buffer_replace (&gst_widget->priv->buffer, NULL);
405 gst_caps_replace (&gst_widget->priv->caps, NULL);
406 gst_caps_replace (&gst_widget->priv->gl_caps, NULL);
408 gst_widget->priv->negotiated = FALSE;
409 gst_widget->priv->initted = FALSE;
410 gst_widget->priv->vao = 0;
411 gst_widget->priv->vertex_buffer = 0;
412 gst_widget->priv->attr_position = 0;
413 gst_widget->priv->attr_texture = 0;
414 gst_widget->priv->current_tex = 0;
415 gst_widget->priv->new_buffer = TRUE;
419 gtk_gst_gl_widget_finalize (GObject * object)
421 GtkGstGLWidget *widget = GTK_GST_GL_WIDGET_CAST (object);
423 g_mutex_clear (&widget->priv->lock);
427 if (widget->priv->other_context) {
428 _invoke_on_main ((ThreadFunc) _reset_gl, widget);
431 if (widget->priv->context) {
432 gst_object_unref (widget->priv->context);
433 widget->priv->context = NULL;
436 if (widget->priv->display) {
437 gst_object_unref (widget->priv->display);
438 widget->priv->display = NULL;
441 G_OBJECT_CLASS (gtk_gst_gl_widget_parent_class)->finalize (object);
445 gtk_gst_gl_widget_set_property (GObject * object, guint prop_id,
446 const GValue * value, GParamSpec * pspec)
448 GtkGstGLWidget *gtk_widget = GTK_GST_GL_WIDGET (object);
451 case PROP_FORCE_ASPECT_RATIO:
452 gtk_widget->priv->force_aspect_ratio = g_value_get_boolean (value);
454 case PROP_PIXEL_ASPECT_RATIO:
455 gtk_widget->priv->par_n = gst_value_get_fraction_numerator (value);
456 gtk_widget->priv->par_d = gst_value_get_fraction_denominator (value);
458 case PROP_IGNORE_ALPHA:
459 gtk_widget->priv->ignore_alpha = g_value_get_boolean (value);
460 gtk_gl_area_set_has_alpha ((GtkGLArea *) gtk_widget,
461 !gtk_widget->priv->ignore_alpha);
464 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
470 gtk_gst_gl_widget_get_property (GObject * object, guint prop_id, GValue * value,
473 GtkGstGLWidget *gtk_widget = GTK_GST_GL_WIDGET (object);
476 case PROP_FORCE_ASPECT_RATIO:
477 g_value_set_boolean (value, gtk_widget->priv->force_aspect_ratio);
479 case PROP_PIXEL_ASPECT_RATIO:
480 gst_value_set_fraction (value, gtk_widget->priv->par_n,
481 gtk_widget->priv->par_d);
483 case PROP_IGNORE_ALPHA:
484 g_value_set_boolean (value, gtk_widget->priv->ignore_alpha);
487 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
493 gtk_gst_gl_widget_class_init (GtkGstGLWidgetClass * klass)
495 GObjectClass *gobject_klass = (GObjectClass *) klass;
496 GtkWidgetClass *widget_klass = (GtkWidgetClass *) klass;
497 GtkGLAreaClass *gl_widget_klass = (GtkGLAreaClass *) klass;
499 g_type_class_add_private (klass, sizeof (GtkGstGLWidgetPrivate));
501 gobject_klass->set_property = gtk_gst_gl_widget_set_property;
502 gobject_klass->get_property = gtk_gst_gl_widget_get_property;
503 gobject_klass->finalize = gtk_gst_gl_widget_finalize;
505 g_object_class_install_property (gobject_klass, PROP_FORCE_ASPECT_RATIO,
506 g_param_spec_boolean ("force-aspect-ratio",
507 "Force aspect ratio",
508 "When enabled, scaling will respect original aspect ratio",
509 DEFAULT_FORCE_ASPECT_RATIO,
510 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
512 g_object_class_install_property (gobject_klass, PROP_PIXEL_ASPECT_RATIO,
513 gst_param_spec_fraction ("pixel-aspect-ratio", "Pixel Aspect Ratio",
514 "The pixel aspect ratio of the device", DEFAULT_PAR_N, DEFAULT_PAR_D,
515 G_MAXINT, 1, 1, 1, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
517 g_object_class_install_property (gobject_klass, PROP_IGNORE_ALPHA,
518 g_param_spec_boolean ("ignore-alpha", "Ignore Alpha",
519 "When enabled, alpha will be ignored and converted to black",
520 DEFAULT_IGNORE_ALPHA, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
522 gl_widget_klass->render = gtk_gst_gl_widget_render;
524 widget_klass->get_preferred_width = gtk_gst_gl_widget_get_preferred_width;
525 widget_klass->get_preferred_height = gtk_gst_gl_widget_get_preferred_height;
529 gtk_gst_gl_widget_init (GtkGstGLWidget * widget)
533 widget->priv = GTK_GST_GL_WIDGET_GET_PRIVATE (widget);
535 widget->priv->force_aspect_ratio = DEFAULT_FORCE_ASPECT_RATIO;
536 widget->priv->par_n = DEFAULT_PAR_N;
537 widget->priv->par_d = DEFAULT_PAR_D;
538 widget->priv->ignore_alpha = DEFAULT_IGNORE_ALPHA;
540 g_mutex_init (&widget->priv->lock);
542 display = gdk_display_get_default ();
544 #if GST_GL_HAVE_WINDOW_X11 && defined (GDK_WINDOWING_X11)
545 if (GDK_IS_X11_DISPLAY (display))
546 widget->priv->display = (GstGLDisplay *)
547 gst_gl_display_x11_new_with_display (gdk_x11_display_get_xdisplay
550 #if GST_GL_HAVE_WINDOW_WAYLAND && defined (GDK_WINDOWING_WAYLAND)
551 if (GDK_IS_WAYLAND_DISPLAY (display)) {
552 struct wl_display *wayland_display =
553 gdk_wayland_display_get_wl_display (display);
554 widget->priv->display = (GstGLDisplay *)
555 gst_gl_display_wayland_new_with_display (wayland_display);
561 if (!widget->priv->display)
562 widget->priv->display = gst_gl_display_new ();
564 gtk_gl_area_set_has_alpha ((GtkGLArea *) widget, !widget->priv->ignore_alpha);
568 gtk_gst_gl_widget_new (void)
570 return (GtkWidget *) g_object_new (GTK_TYPE_GST_GL_WIDGET, NULL);
574 _queue_draw (GtkGstGLWidget * widget)
576 gtk_widget_queue_draw (GTK_WIDGET (widget));
578 return G_SOURCE_REMOVE;
582 gtk_gst_gl_widget_set_buffer (GtkGstGLWidget * widget, GstBuffer * buffer)
584 GMainContext *main_context = g_main_context_default ();
586 g_return_if_fail (GTK_IS_GST_GL_WIDGET (widget));
587 g_return_if_fail (widget->priv->negotiated);
589 g_mutex_lock (&widget->priv->lock);
591 gst_buffer_replace (&widget->priv->buffer, buffer);
592 widget->priv->new_buffer = TRUE;
594 g_mutex_unlock (&widget->priv->lock);
596 g_main_context_invoke (main_context, (GSourceFunc) _queue_draw, widget);
600 _get_gl_context (GtkGstGLWidget * gst_widget)
602 GstGLPlatform platform;
606 gtk_widget_realize (GTK_WIDGET (gst_widget));
608 if (gst_widget->priv->gdk_context)
609 g_object_unref (gst_widget->priv->gdk_context);
610 gst_widget->priv->gdk_context =
611 gtk_gl_area_get_context (GTK_GL_AREA (gst_widget));
612 if (gst_widget->priv->gdk_context == NULL) {
613 g_assert_not_reached ();
617 g_object_ref (gst_widget->priv->gdk_context);
619 gdk_gl_context_make_current (gst_widget->priv->gdk_context);
621 #if GST_GL_HAVE_WINDOW_X11 && defined (GDK_WINDOWING_X11)
622 if (GST_IS_GL_DISPLAY_X11 (gst_widget->priv->display)) {
623 platform = GST_GL_PLATFORM_GLX;
624 gl_api = gst_gl_context_get_current_gl_api (NULL, NULL);
625 gl_handle = gst_gl_context_get_current_gl_context (platform);
627 gst_widget->priv->other_context =
628 gst_gl_context_new_wrapped (gst_widget->priv->display, gl_handle,
632 #if GST_GL_HAVE_WINDOW_WAYLAND && defined (GDK_WINDOWING_WAYLAND)
633 if (GST_IS_GL_DISPLAY_WAYLAND (gst_widget->priv->display)) {
634 platform = GST_GL_PLATFORM_EGL;
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,
648 if (gst_widget->priv->other_context) {
649 GError *error = NULL;
651 gst_gl_context_activate (gst_widget->priv->other_context, TRUE);
652 if (!gst_gl_context_fill_info (gst_widget->priv->other_context, &error)) {
653 GST_ERROR ("failed to retreive gdk context info: %s", error->message);
654 g_object_unref (gst_widget->priv->other_context);
655 gst_widget->priv->other_context = NULL;
657 gst_gl_context_activate (gst_widget->priv->other_context, FALSE);
663 _queue_resize (GtkGstGLWidget * widget)
665 gtk_widget_queue_resize (GTK_WIDGET (widget));
667 return G_SOURCE_REMOVE;
671 gtk_gst_gl_widget_init_winsys (GtkGstGLWidget * widget)
673 g_return_val_if_fail (GTK_IS_GST_GL_WIDGET (widget), FALSE);
675 g_mutex_lock (&widget->priv->lock);
677 if (widget->priv->display && widget->priv->gdk_context
678 && widget->priv->other_context) {
679 g_mutex_unlock (&widget->priv->lock);
683 if (!widget->priv->other_context) {
684 _invoke_on_main ((ThreadFunc) _get_gl_context, widget);
687 if (!GST_GL_IS_CONTEXT (widget->priv->other_context)) {
688 g_mutex_unlock (&widget->priv->lock);
692 widget->priv->context = gst_gl_context_new (widget->priv->display);
694 if (!widget->priv->context) {
695 g_mutex_unlock (&widget->priv->lock);
699 gst_gl_context_create (widget->priv->context, widget->priv->other_context,
702 g_mutex_unlock (&widget->priv->lock);
707 _calculate_par (GtkGstGLWidget * widget, GstVideoInfo * info)
712 gint display_par_n, display_par_d;
713 guint display_ratio_num, display_ratio_den;
715 width = GST_VIDEO_INFO_WIDTH (info);
716 height = GST_VIDEO_INFO_HEIGHT (info);
718 par_n = GST_VIDEO_INFO_PAR_N (info);
719 par_d = GST_VIDEO_INFO_PAR_D (info);
724 /* get display's PAR */
725 if (widget->priv->par_n != 0 && widget->priv->par_d != 0) {
726 display_par_n = widget->priv->par_n;
727 display_par_d = widget->priv->par_d;
733 ok = gst_video_calculate_display_ratio (&display_ratio_num,
734 &display_ratio_den, width, height, par_n, par_d, display_par_n,
740 GST_LOG ("PAR: %u/%u DAR:%u/%u", par_n, par_d, display_par_n, display_par_d);
742 if (height % display_ratio_den == 0) {
743 GST_DEBUG ("keeping video height");
744 widget->priv->display_width = (guint)
745 gst_util_uint64_scale_int (height, display_ratio_num,
747 widget->priv->display_height = height;
748 } else if (width % display_ratio_num == 0) {
749 GST_DEBUG ("keeping video width");
750 widget->priv->display_width = width;
751 widget->priv->display_height = (guint)
752 gst_util_uint64_scale_int (width, display_ratio_den, display_ratio_num);
754 GST_DEBUG ("approximating while keeping video height");
755 widget->priv->display_width = (guint)
756 gst_util_uint64_scale_int (height, display_ratio_num,
758 widget->priv->display_height = height;
760 GST_DEBUG ("scaling to %dx%d", widget->priv->display_width,
761 widget->priv->display_height);
767 gtk_gst_gl_widget_set_caps (GtkGstGLWidget * widget, GstCaps * caps)
769 GMainContext *main_context = g_main_context_default ();
772 g_return_val_if_fail (GTK_IS_GST_GL_WIDGET (widget), FALSE);
773 g_return_val_if_fail (GST_IS_CAPS (caps), FALSE);
774 g_return_val_if_fail (gst_caps_is_fixed (caps), FALSE);
776 if (widget->priv->caps && gst_caps_is_equal_fixed (widget->priv->caps, caps))
779 if (!gst_video_info_from_caps (&v_info, caps))
782 g_mutex_lock (&widget->priv->lock);
786 gst_caps_replace (&widget->priv->caps, caps);
788 widget->priv->gl_caps = gst_video_info_to_caps (&v_info);
789 gst_caps_set_features (widget->priv->gl_caps, 0,
790 gst_caps_features_from_string (GST_CAPS_FEATURE_MEMORY_GL_MEMORY));
792 if (!_calculate_par (widget, &v_info)) {
793 g_mutex_unlock (&widget->priv->lock);
797 widget->priv->v_info = v_info;
798 widget->priv->negotiated = TRUE;
800 g_mutex_unlock (&widget->priv->lock);
802 g_main_context_invoke (main_context, (GSourceFunc) _queue_resize, widget);
808 gtk_gst_gl_widget_get_gtk_context (GtkGstGLWidget * gst_widget)
810 if (!gst_widget->priv->other_context)
813 return gst_object_ref (gst_widget->priv->other_context);
817 gtk_gst_gl_widget_get_context (GtkGstGLWidget * gst_widget)
819 if (!gst_widget->priv->context)
822 return gst_object_ref (gst_widget->priv->context);
826 gtk_gst_gl_widget_get_display (GtkGstGLWidget * gst_widget)
828 if (!gst_widget->priv->display)
831 return gst_object_ref (gst_widget->priv->display);