mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-12-04 23:46:43 +00:00
7f95a809e9
Some embedded platforms will use EGL instead of GLX within the X11 ecosystem.
581 lines
16 KiB
C
581 lines
16 KiB
C
/*
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* GStreamer
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* Copyright (C) 2015 Matthew Waters <matthew@centricular.com>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include <stdio.h>
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#include "gtkgstglwidget.h"
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#include "gstgtkutils.h"
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#include <gst/gl/gstglfuncs.h>
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#include <gst/video/video.h>
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#if GST_GL_HAVE_WINDOW_X11 && defined (GDK_WINDOWING_X11)
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#include <gdk/gdkx.h>
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#include <gst/gl/x11/gstgldisplay_x11.h>
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#endif
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#if GST_GL_HAVE_WINDOW_WAYLAND && defined (GDK_WINDOWING_WAYLAND)
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#include <gdk/gdkwayland.h>
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#include <gst/gl/wayland/gstgldisplay_wayland.h>
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#endif
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/**
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* SECTION:gtkgstglwidget
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* @title: GtkGstGlWidget
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* @short_description: a #GtkGLArea that renders GStreamer video #GstBuffers
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* @see_also: #GtkGLArea, #GstBuffer
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*
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* #GtkGstGLWidget is an #GtkWidget that renders GStreamer video buffers.
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*/
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#define GST_CAT_DEFAULT gtk_gst_gl_widget_debug
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GST_DEBUG_CATEGORY_STATIC (GST_CAT_DEFAULT);
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struct _GtkGstGLWidgetPrivate
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{
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gboolean initted;
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GstGLDisplay *display;
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GdkGLContext *gdk_context;
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GstGLContext *other_context;
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GstGLContext *context;
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GstGLUpload *upload;
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GstGLShader *shader;
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GLuint vao;
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GLuint vertex_buffer;
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GLint attr_position;
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GLint attr_texture;
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GLuint current_tex;
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GstGLOverlayCompositor *overlay_compositor;
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};
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static const GLfloat vertices[] = {
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1.0f, 1.0f, 0.0f, 1.0f, 0.0f,
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-1.0f, 1.0f, 0.0f, 0.0f, 0.0f,
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-1.0f, -1.0f, 0.0f, 0.0f, 1.0f,
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1.0f, -1.0f, 0.0f, 1.0f, 1.0f
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};
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G_DEFINE_TYPE_WITH_CODE (GtkGstGLWidget, gtk_gst_gl_widget, GTK_TYPE_GL_AREA,
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G_ADD_PRIVATE (GtkGstGLWidget)
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GST_DEBUG_CATEGORY_INIT (GST_CAT_DEFAULT, "gtkgstglwidget", 0,
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"Gtk Gst GL Widget");
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);
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static void
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gtk_gst_gl_widget_bind_buffer (GtkGstGLWidget * gst_widget)
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{
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GtkGstGLWidgetPrivate *priv = gst_widget->priv;
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const GstGLFuncs *gl = priv->context->gl_vtable;
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gl->BindBuffer (GL_ARRAY_BUFFER, priv->vertex_buffer);
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/* Load the vertex position */
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gl->VertexAttribPointer (priv->attr_position, 3, GL_FLOAT, GL_FALSE,
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5 * sizeof (GLfloat), (void *) 0);
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/* Load the texture coordinate */
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gl->VertexAttribPointer (priv->attr_texture, 2, GL_FLOAT, GL_FALSE,
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5 * sizeof (GLfloat), (void *) (3 * sizeof (GLfloat)));
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gl->EnableVertexAttribArray (priv->attr_position);
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gl->EnableVertexAttribArray (priv->attr_texture);
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}
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static void
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gtk_gst_gl_widget_unbind_buffer (GtkGstGLWidget * gst_widget)
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{
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GtkGstGLWidgetPrivate *priv = gst_widget->priv;
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const GstGLFuncs *gl = priv->context->gl_vtable;
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gl->BindBuffer (GL_ARRAY_BUFFER, 0);
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gl->DisableVertexAttribArray (priv->attr_position);
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gl->DisableVertexAttribArray (priv->attr_texture);
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}
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static void
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gtk_gst_gl_widget_init_redisplay (GtkGstGLWidget * gst_widget)
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{
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GtkGstGLWidgetPrivate *priv = gst_widget->priv;
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const GstGLFuncs *gl = priv->context->gl_vtable;
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GError *error = NULL;
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gst_gl_insert_debug_marker (priv->other_context, "initializing redisplay");
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if (!(priv->shader = gst_gl_shader_new_default (priv->context, &error))) {
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GST_ERROR ("Failed to initialize shader: %s", error->message);
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return;
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}
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priv->attr_position =
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gst_gl_shader_get_attribute_location (priv->shader, "a_position");
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priv->attr_texture =
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gst_gl_shader_get_attribute_location (priv->shader, "a_texcoord");
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if (gl->GenVertexArrays) {
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gl->GenVertexArrays (1, &priv->vao);
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gl->BindVertexArray (priv->vao);
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}
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gl->GenBuffers (1, &priv->vertex_buffer);
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gl->BindBuffer (GL_ARRAY_BUFFER, priv->vertex_buffer);
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gl->BufferData (GL_ARRAY_BUFFER, 4 * 5 * sizeof (GLfloat), vertices,
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GL_STATIC_DRAW);
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if (gl->GenVertexArrays) {
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gtk_gst_gl_widget_bind_buffer (gst_widget);
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gl->BindVertexArray (0);
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}
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gl->BindBuffer (GL_ARRAY_BUFFER, 0);
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priv->overlay_compositor =
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gst_gl_overlay_compositor_new (priv->other_context);
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priv->initted = TRUE;
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}
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static void
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_redraw_texture (GtkGstGLWidget * gst_widget, guint tex)
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{
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GtkGstGLWidgetPrivate *priv = gst_widget->priv;
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const GstGLFuncs *gl = priv->context->gl_vtable;
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const GLushort indices[] = { 0, 1, 2, 0, 2, 3 };
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if (gst_widget->base.force_aspect_ratio) {
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GstVideoRectangle src, dst, result;
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gint widget_width, widget_height, widget_scale;
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gl->ClearColor (0.0, 0.0, 0.0, 0.0);
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gl->Clear (GL_COLOR_BUFFER_BIT);
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widget_scale = gtk_widget_get_scale_factor ((GtkWidget *) gst_widget);
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widget_width = gtk_widget_get_allocated_width ((GtkWidget *) gst_widget);
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widget_height = gtk_widget_get_allocated_height ((GtkWidget *) gst_widget);
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src.x = 0;
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src.y = 0;
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src.w = gst_widget->base.display_width;
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src.h = gst_widget->base.display_height;
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dst.x = 0;
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dst.y = 0;
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dst.w = widget_width * widget_scale;
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dst.h = widget_height * widget_scale;
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gst_video_sink_center_rect (src, dst, &result, TRUE);
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gl->Viewport (result.x, result.y, result.w, result.h);
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}
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gst_gl_shader_use (priv->shader);
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if (gl->BindVertexArray)
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gl->BindVertexArray (priv->vao);
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gtk_gst_gl_widget_bind_buffer (gst_widget);
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gl->ActiveTexture (GL_TEXTURE0);
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gl->BindTexture (GL_TEXTURE_2D, tex);
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gst_gl_shader_set_uniform_1i (priv->shader, "tex", 0);
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gl->DrawElements (GL_TRIANGLES, 6, GL_UNSIGNED_SHORT, indices);
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if (gl->BindVertexArray)
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gl->BindVertexArray (0);
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else
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gtk_gst_gl_widget_unbind_buffer (gst_widget);
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gl->BindTexture (GL_TEXTURE_2D, 0);
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}
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static inline void
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_draw_black (GstGLContext * context)
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{
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const GstGLFuncs *gl = context->gl_vtable;
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gst_gl_insert_debug_marker (context, "no buffer. rendering black");
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gl->ClearColor (0.0, 0.0, 0.0, 0.0);
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gl->Clear (GL_COLOR_BUFFER_BIT);
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}
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static gboolean
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gtk_gst_gl_widget_render (GtkGLArea * widget, GdkGLContext * context)
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{
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GtkGstGLWidgetPrivate *priv = GTK_GST_GL_WIDGET (widget)->priv;
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GtkGstBaseWidget *base_widget = GTK_GST_BASE_WIDGET (widget);
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GTK_GST_BASE_WIDGET_LOCK (widget);
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if (!priv->context || !priv->other_context)
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goto done;
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gst_gl_context_activate (priv->other_context, TRUE);
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if (!priv->initted)
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gtk_gst_gl_widget_init_redisplay (GTK_GST_GL_WIDGET (widget));
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if (!priv->initted || !base_widget->negotiated) {
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_draw_black (priv->other_context);
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goto done;
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}
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/* Upload latest buffer */
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if (base_widget->pending_buffer) {
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GstBuffer *buffer = base_widget->pending_buffer;
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GstVideoFrame gl_frame;
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GstGLSyncMeta *sync_meta;
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if (!gst_video_frame_map (&gl_frame, &base_widget->v_info, buffer,
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GST_MAP_READ | GST_MAP_GL)) {
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_draw_black (priv->other_context);
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goto done;
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}
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priv->current_tex = *(guint *) gl_frame.data[0];
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gst_gl_insert_debug_marker (priv->other_context, "redrawing texture %u",
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priv->current_tex);
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gst_gl_overlay_compositor_upload_overlays (priv->overlay_compositor,
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buffer);
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sync_meta = gst_buffer_get_gl_sync_meta (buffer);
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if (sync_meta) {
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/* XXX: the set_sync() seems to be needed for resizing */
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gst_gl_sync_meta_set_sync_point (sync_meta, priv->context);
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gst_gl_sync_meta_wait (sync_meta, priv->other_context);
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}
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gst_video_frame_unmap (&gl_frame);
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if (base_widget->buffer)
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gst_buffer_unref (base_widget->buffer);
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/* Keep the buffer to ensure current_tex stay valid */
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base_widget->buffer = buffer;
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base_widget->pending_buffer = NULL;
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}
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GST_DEBUG ("rendering buffer %p with gdk context %p",
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base_widget->buffer, context);
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_redraw_texture (GTK_GST_GL_WIDGET (widget), priv->current_tex);
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gst_gl_overlay_compositor_draw_overlays (priv->overlay_compositor);
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gst_gl_insert_debug_marker (priv->other_context, "texture %u redrawn",
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priv->current_tex);
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done:
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if (priv->other_context)
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gst_gl_context_activate (priv->other_context, FALSE);
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GTK_GST_BASE_WIDGET_UNLOCK (widget);
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return FALSE;
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}
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static void
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_reset_gl (GtkGstGLWidget * gst_widget)
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{
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GtkGstGLWidgetPrivate *priv = gst_widget->priv;
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const GstGLFuncs *gl = priv->other_context->gl_vtable;
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if (!priv->gdk_context)
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priv->gdk_context = gtk_gl_area_get_context (GTK_GL_AREA (gst_widget));
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if (priv->gdk_context == NULL)
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return;
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gdk_gl_context_make_current (priv->gdk_context);
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gst_gl_context_activate (priv->other_context, TRUE);
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if (priv->vao) {
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gl->DeleteVertexArrays (1, &priv->vao);
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priv->vao = 0;
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}
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if (priv->vertex_buffer) {
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gl->DeleteBuffers (1, &priv->vertex_buffer);
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priv->vertex_buffer = 0;
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}
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if (priv->upload) {
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gst_object_unref (priv->upload);
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priv->upload = NULL;
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}
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if (priv->shader) {
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gst_object_unref (priv->shader);
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priv->shader = NULL;
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}
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if (priv->overlay_compositor)
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gst_object_unref (priv->overlay_compositor);
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gst_gl_context_activate (priv->other_context, FALSE);
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gst_object_unref (priv->other_context);
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priv->other_context = NULL;
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gdk_gl_context_clear_current ();
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g_object_unref (priv->gdk_context);
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priv->gdk_context = NULL;
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}
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static void
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gtk_gst_gl_widget_finalize (GObject * object)
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{
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GtkGstGLWidgetPrivate *priv = GTK_GST_GL_WIDGET (object)->priv;
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GtkGstBaseWidget *base_widget = GTK_GST_BASE_WIDGET (object);
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if (priv->other_context)
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gst_gtk_invoke_on_main ((GThreadFunc) _reset_gl, base_widget);
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if (priv->context)
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gst_object_unref (priv->context);
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if (priv->display)
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gst_object_unref (priv->display);
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gtk_gst_base_widget_finalize (object);
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G_OBJECT_CLASS (gtk_gst_gl_widget_parent_class)->finalize (object);
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}
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static void
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gtk_gst_gl_widget_class_init (GtkGstGLWidgetClass * klass)
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{
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GObjectClass *gobject_klass = (GObjectClass *) klass;
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GtkGLAreaClass *gl_widget_klass = (GtkGLAreaClass *) klass;
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gtk_gst_base_widget_class_init (GTK_GST_BASE_WIDGET_CLASS (klass));
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gobject_klass->finalize = gtk_gst_gl_widget_finalize;
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gl_widget_klass->render = gtk_gst_gl_widget_render;
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}
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static void
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gtk_gst_gl_widget_init (GtkGstGLWidget * gst_widget)
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{
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GtkGstBaseWidget *base_widget = GTK_GST_BASE_WIDGET (gst_widget);
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GdkDisplay *display;
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GtkGstGLWidgetPrivate *priv;
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gtk_gst_base_widget_init (base_widget);
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gst_widget->priv = priv = gtk_gst_gl_widget_get_instance_private (gst_widget);
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display = gdk_display_get_default ();
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#if GST_GL_HAVE_WINDOW_X11 && defined (GDK_WINDOWING_X11)
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if (GDK_IS_X11_DISPLAY (display)) {
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priv->display = (GstGLDisplay *)
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gst_gl_display_x11_new_with_display (gdk_x11_display_get_xdisplay
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(display));
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}
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#endif
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#if GST_GL_HAVE_WINDOW_WAYLAND && defined (GDK_WINDOWING_WAYLAND)
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if (GDK_IS_WAYLAND_DISPLAY (display)) {
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struct wl_display *wayland_display =
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gdk_wayland_display_get_wl_display (display);
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priv->display = (GstGLDisplay *)
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gst_gl_display_wayland_new_with_display (wayland_display);
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}
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#endif
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(void) display;
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if (!priv->display)
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priv->display = gst_gl_display_new ();
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GST_INFO ("Created %" GST_PTR_FORMAT, priv->display);
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gtk_gl_area_set_has_alpha (GTK_GL_AREA (gst_widget),
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!base_widget->ignore_alpha);
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}
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static void
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_get_gl_context (GtkGstGLWidget * gst_widget)
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{
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GtkGstGLWidgetPrivate *priv = gst_widget->priv;
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GstGLPlatform platform = GST_GL_PLATFORM_NONE;
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GstGLAPI gl_api = GST_GL_API_NONE;
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guintptr gl_handle = 0;
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gtk_widget_realize (GTK_WIDGET (gst_widget));
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if (priv->other_context)
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gst_object_unref (priv->other_context);
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priv->other_context = NULL;
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if (priv->gdk_context)
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g_object_unref (priv->gdk_context);
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priv->gdk_context = gtk_gl_area_get_context (GTK_GL_AREA (gst_widget));
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if (priv->gdk_context == NULL) {
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GError *error = gtk_gl_area_get_error (GTK_GL_AREA (gst_widget));
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GST_ERROR_OBJECT (gst_widget, "Error creating GdkGLContext : %s",
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error ? error->message : "No error set by Gdk");
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g_clear_error (&error);
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return;
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}
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g_object_ref (priv->gdk_context);
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gdk_gl_context_make_current (priv->gdk_context);
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#if GST_GL_HAVE_WINDOW_X11 && defined (GDK_WINDOWING_X11)
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if (GST_IS_GL_DISPLAY_X11 (priv->display)) {
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#if GST_GL_HAVE_PLATFORM_GLX
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if (!gl_handle) {
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platform = GST_GL_PLATFORM_GLX;
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gl_handle = gst_gl_context_get_current_gl_context (platform);
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}
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#endif
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#if GST_GL_HAVE_PLATFORM_EGL
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if (!gl_handle) {
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platform = GST_GL_PLATFORM_EGL;
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gl_handle = gst_gl_context_get_current_gl_context (platform);
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}
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#endif
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|
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if (gl_handle) {
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gl_api = gst_gl_context_get_current_gl_api (platform, NULL, NULL);
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priv->other_context =
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gst_gl_context_new_wrapped (priv->display, gl_handle,
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platform, gl_api);
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}
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}
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#endif
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#if GST_GL_HAVE_WINDOW_WAYLAND && GST_GL_HAVE_PLATFORM_EGL && defined (GDK_WINDOWING_WAYLAND)
|
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if (GST_IS_GL_DISPLAY_WAYLAND (priv->display)) {
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platform = GST_GL_PLATFORM_EGL;
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gl_api = gst_gl_context_get_current_gl_api (platform, NULL, NULL);
|
|
gl_handle = gst_gl_context_get_current_gl_context (platform);
|
|
if (gl_handle)
|
|
priv->other_context =
|
|
gst_gl_context_new_wrapped (priv->display, gl_handle,
|
|
platform, gl_api);
|
|
}
|
|
#endif
|
|
|
|
(void) platform;
|
|
(void) gl_api;
|
|
(void) gl_handle;
|
|
|
|
if (priv->other_context) {
|
|
GError *error = NULL;
|
|
|
|
GST_INFO ("Retrieved Gdk OpenGL context %" GST_PTR_FORMAT,
|
|
priv->other_context);
|
|
gst_gl_context_activate (priv->other_context, TRUE);
|
|
if (!gst_gl_context_fill_info (priv->other_context, &error)) {
|
|
GST_ERROR ("failed to retrieve gdk context info: %s", error->message);
|
|
g_clear_error (&error);
|
|
g_object_unref (priv->other_context);
|
|
priv->other_context = NULL;
|
|
} else {
|
|
gst_gl_context_activate (priv->other_context, FALSE);
|
|
}
|
|
} else {
|
|
GST_WARNING ("Could not retrieve Gdk OpenGL context");
|
|
}
|
|
}
|
|
|
|
GtkWidget *
|
|
gtk_gst_gl_widget_new (void)
|
|
{
|
|
return (GtkWidget *) g_object_new (GTK_TYPE_GST_GL_WIDGET, NULL);
|
|
}
|
|
|
|
gboolean
|
|
gtk_gst_gl_widget_init_winsys (GtkGstGLWidget * gst_widget)
|
|
{
|
|
GtkGstGLWidgetPrivate *priv = gst_widget->priv;
|
|
GError *error = NULL;
|
|
|
|
g_return_val_if_fail (GTK_IS_GST_GL_WIDGET (gst_widget), FALSE);
|
|
g_return_val_if_fail (priv->display != NULL, FALSE);
|
|
|
|
GTK_GST_BASE_WIDGET_LOCK (gst_widget);
|
|
|
|
if (priv->display && priv->gdk_context && priv->other_context) {
|
|
GST_TRACE ("have already initialized contexts");
|
|
GTK_GST_BASE_WIDGET_UNLOCK (gst_widget);
|
|
return TRUE;
|
|
}
|
|
|
|
if (!priv->other_context) {
|
|
GTK_GST_BASE_WIDGET_UNLOCK (gst_widget);
|
|
gst_gtk_invoke_on_main ((GThreadFunc) _get_gl_context, gst_widget);
|
|
GTK_GST_BASE_WIDGET_LOCK (gst_widget);
|
|
}
|
|
|
|
if (!GST_IS_GL_CONTEXT (priv->other_context)) {
|
|
GST_FIXME ("Could not retrieve Gdk OpenGL context");
|
|
GTK_GST_BASE_WIDGET_UNLOCK (gst_widget);
|
|
return FALSE;
|
|
}
|
|
|
|
GST_OBJECT_LOCK (priv->display);
|
|
if (!gst_gl_display_create_context (priv->display, priv->other_context,
|
|
&priv->context, &error)) {
|
|
GST_WARNING ("Could not create OpenGL context: %s",
|
|
error ? error->message : "Unknown");
|
|
g_clear_error (&error);
|
|
GST_OBJECT_UNLOCK (priv->display);
|
|
GTK_GST_BASE_WIDGET_UNLOCK (gst_widget);
|
|
return FALSE;
|
|
}
|
|
gst_gl_display_add_context (priv->display, priv->context);
|
|
GST_OBJECT_UNLOCK (priv->display);
|
|
|
|
GTK_GST_BASE_WIDGET_UNLOCK (gst_widget);
|
|
return TRUE;
|
|
}
|
|
|
|
GstGLContext *
|
|
gtk_gst_gl_widget_get_gtk_context (GtkGstGLWidget * gst_widget)
|
|
{
|
|
if (!gst_widget->priv->other_context)
|
|
return NULL;
|
|
|
|
return gst_object_ref (gst_widget->priv->other_context);
|
|
}
|
|
|
|
GstGLContext *
|
|
gtk_gst_gl_widget_get_context (GtkGstGLWidget * gst_widget)
|
|
{
|
|
if (!gst_widget->priv->context)
|
|
return NULL;
|
|
|
|
return gst_object_ref (gst_widget->priv->context);
|
|
}
|
|
|
|
GstGLDisplay *
|
|
gtk_gst_gl_widget_get_display (GtkGstGLWidget * gst_widget)
|
|
{
|
|
if (!gst_widget->priv->display)
|
|
return NULL;
|
|
|
|
return gst_object_ref (gst_widget->priv->display);
|
|
}
|