mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-12-04 23:46:43 +00:00
294 lines
10 KiB
C++
294 lines
10 KiB
C++
/*
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* GStreamer
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* Copyright (C) 2008-2009 Julien Isorce <julien.isorce@gmail.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 <gst/gst.h>
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#include <gtk/gtk.h>
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#include <gdk/gdk.h>
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#include "../gstgtk.h"
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#ifdef HAVE_X11
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#include <X11/Xlib.h>
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#endif
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static GstBusSyncReply create_window (GstBus* bus, GstMessage* message, GtkWidget* widget)
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{
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GtkAllocation allocation;
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if (gst_gtk_handle_need_context (bus, message, NULL))
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return GST_BUS_DROP;
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// ignore anything but 'prepare-window-handle' element messages
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if (GST_MESSAGE_TYPE (message) != GST_MESSAGE_ELEMENT)
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return GST_BUS_PASS;
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if (!gst_is_video_overlay_prepare_window_handle_message (message))
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return GST_BUS_PASS;
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g_print ("setting window handle %p\n", widget);
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gst_video_overlay_set_gtk_window (GST_VIDEO_OVERLAY (GST_MESSAGE_SRC (message)), widget);
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gtk_widget_get_allocation (widget, &allocation);
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gst_video_overlay_set_render_rectangle (GST_VIDEO_OVERLAY (GST_MESSAGE_SRC (message)), allocation.x, allocation.y, allocation.width, allocation.height);
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gst_message_unref (message);
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return GST_BUS_DROP;
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}
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static gboolean
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resize_cb (GtkWidget * widget, GdkEvent * event, gpointer sink)
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{
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GtkAllocation allocation;
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gtk_widget_get_allocation (widget, &allocation);
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gst_video_overlay_set_render_rectangle (GST_VIDEO_OVERLAY (sink), allocation.x, allocation.y, allocation.width, allocation.height);
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return FALSE;
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}
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static void end_stream_cb(GstBus* bus, GstMessage* message, GstElement* pipeline)
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{
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GError *error = NULL;
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gchar *details;
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switch (GST_MESSAGE_TYPE (message)) {
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case GST_MESSAGE_ERROR:
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gst_message_parse_error (message, &error, &details);
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g_print("Error %s\n", error->message);
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g_print("Details %s\n", details);
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/* fallthrough */
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case GST_MESSAGE_EOS:
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g_print("End of stream\n");
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gst_element_set_state (pipeline, GST_STATE_NULL);
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gst_object_unref(pipeline);
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gtk_main_quit();
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break;
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case GST_MESSAGE_WARNING:
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gst_message_parse_warning (message, &error, &details);
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g_print("Warning %s\n", error->message);
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g_print("Details %s\n", details);
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break;
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default:
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break;
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}
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}
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static gboolean expose_cb(GtkWidget* widget, cairo_t *cr, GstElement* videosink)
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{
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g_print ("expose %p\n", widget);
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g_print ("event mask: 0x%x, button_press 0x%x\n", gtk_widget_get_events (widget), GDK_BUTTON_PRESS_MASK);
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gst_video_overlay_expose (GST_VIDEO_OVERLAY (videosink));
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return FALSE;
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}
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static gboolean on_click_drawing_area(GtkWidget* widget, GdkEventButton* event, GstElement* videosink)
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{
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GtkAllocation allocation;
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GtkWidget *parent = gtk_widget_get_parent (widget);
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g_print ("switch the drawing area %p\n", widget);
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gst_video_overlay_set_gtk_window (GST_VIDEO_OVERLAY (videosink), widget);
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gtk_widget_get_allocation (widget, &allocation);
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gst_video_overlay_set_render_rectangle (GST_VIDEO_OVERLAY (videosink), allocation.x, allocation.y, allocation.width, allocation.height);
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/* XXX: required on wayland as changing the window handle (subsurface)
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* requires a wl_surface::commit from the parent */
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if (parent)
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gtk_widget_queue_draw (parent);
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return FALSE;
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}
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static void destroy_cb(GtkWidget* widget, GdkEvent* event, GstElement* pipeline)
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{
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g_print("Close\n");
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gst_element_set_state (pipeline, GST_STATE_NULL);
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gst_object_unref(pipeline);
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gtk_main_quit();
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}
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static void button_state_null_cb(GtkWidget* widget, GstElement* pipeline)
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{
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gst_element_set_state (pipeline, GST_STATE_NULL);
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g_print ("GST_STATE_NULL\n");
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}
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static void button_state_ready_cb(GtkWidget* widget, GstElement* pipeline)
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{
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gst_element_set_state (pipeline, GST_STATE_READY);
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g_print ("GST_STATE_READY\n");
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}
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static void button_state_paused_cb(GtkWidget* widget, GstElement* pipeline)
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{
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gst_element_set_state (pipeline, GST_STATE_PAUSED);
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g_print ("GST_STATE_PAUSED\n");
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}
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static void button_state_playing_cb(GtkWidget* widget, GstElement* pipeline)
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{
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gst_element_set_state (pipeline, GST_STATE_PLAYING);
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g_print ("GST_STATE_PLAYING\n");
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}
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gint main (gint argc, gchar *argv[])
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{
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#ifdef HAVE_X11
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XInitThreads();
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#endif
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gtk_init (&argc, &argv);
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gst_init (&argc, &argv);
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GstElement* pipeline = gst_pipeline_new ("pipeline");
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//window that contains several ares where the video is drawn
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GtkWidget* window = gtk_window_new(GTK_WINDOW_TOPLEVEL);
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gtk_widget_set_size_request (window, 640, 240);
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gtk_window_move (GTK_WINDOW (window), 300, 10);
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gtk_window_set_title (GTK_WINDOW (window), "click on left, right or outside the main window to switch the drawing area");
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GdkGeometry geometry;
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geometry.min_width = 1;
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geometry.min_height = 1;
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geometry.max_width = -1;
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geometry.max_height = -1;
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gtk_window_set_geometry_hints (GTK_WINDOW (window), window, &geometry, GDK_HINT_MIN_SIZE);
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//window to control the states
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GtkWidget* window_control = gtk_window_new (GTK_WINDOW_TOPLEVEL);
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geometry.min_width = 1;
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geometry.min_height = 1;
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geometry.max_width = -1;
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geometry.max_height = -1;
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gtk_window_set_geometry_hints (GTK_WINDOW (window_control), window_control, &geometry, GDK_HINT_MIN_SIZE);
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gtk_window_set_resizable (GTK_WINDOW (window_control), FALSE);
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gtk_window_move (GTK_WINDOW (window_control), 10, 10);
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GtkWidget* table = gtk_grid_new ();
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gtk_container_add (GTK_CONTAINER (window_control), table);
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//control state null
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GtkWidget* button_state_null = gtk_button_new_with_label ("GST_STATE_NULL");
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g_signal_connect (G_OBJECT (button_state_null), "clicked",
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G_CALLBACK (button_state_null_cb), pipeline);
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gtk_grid_attach (GTK_GRID (table), button_state_null, 0, 0, 1, 1);
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gtk_widget_show (button_state_null);
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//control state ready
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GtkWidget* button_state_ready = gtk_button_new_with_label ("GST_STATE_READY");
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g_signal_connect (G_OBJECT (button_state_ready), "clicked",
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G_CALLBACK (button_state_ready_cb), pipeline);
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gtk_grid_attach (GTK_GRID (table), button_state_ready, 0, 1, 1, 1);
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gtk_widget_show (button_state_ready);
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//control state paused
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GtkWidget* button_state_paused = gtk_button_new_with_label ("GST_STATE_PAUSED");
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g_signal_connect (G_OBJECT (button_state_paused), "clicked",
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G_CALLBACK (button_state_paused_cb), pipeline);
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gtk_grid_attach (GTK_GRID (table), button_state_paused, 0, 2, 1, 1);
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gtk_widget_show (button_state_paused);
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//control state playing
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GtkWidget* button_state_playing = gtk_button_new_with_label ("GST_STATE_PLAYING");
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g_signal_connect (G_OBJECT (button_state_playing), "clicked",
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G_CALLBACK (button_state_playing_cb), pipeline);
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gtk_grid_attach (GTK_GRID (table), button_state_playing, 0, 3, 1, 1);
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gtk_widget_show (button_state_playing);
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gtk_widget_show (table);
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gtk_widget_show (window_control);
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//configure the pipeline
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g_signal_connect(G_OBJECT(window), "delete-event", G_CALLBACK(destroy_cb), pipeline);
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GstElement* videosrc = gst_element_factory_make ("videotestsrc", "videotestsrc");
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GstElement* videosink = gst_element_factory_make ("glimagesink", "glimagesink");
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gst_bin_add_many (GST_BIN (pipeline), videosrc, videosink, NULL);
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gboolean link_ok = gst_element_link_many(videosrc, videosink, NULL);
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if(!link_ok)
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{
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g_warning("Failed to link videosrc to videosink!\n") ;
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return -1;
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}
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//areas where the video is drawn
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GtkWidget* table_areas = gtk_grid_new ();
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gtk_container_add (GTK_CONTAINER (window), table_areas);
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GtkWidget* area_top_left = gtk_drawing_area_new();
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gtk_widget_add_events(area_top_left, GDK_BUTTON_PRESS_MASK);
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gtk_widget_set_size_request (area_top_left, 320, 240);
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gtk_grid_attach (GTK_GRID (table_areas), area_top_left, 0, 0, 1, 1);
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GtkWidget* area_top_right = gtk_drawing_area_new();
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gtk_widget_add_events(area_top_right, GDK_BUTTON_PRESS_MASK);
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gtk_widget_set_size_request (area_top_right, 320, 240);
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gtk_grid_attach (GTK_GRID (table_areas), area_top_right, 1, 0, 1, 1);
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gtk_widget_set_redraw_on_allocate (area_top_left, TRUE);
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gtk_widget_set_redraw_on_allocate (area_top_right, TRUE);
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gtk_widget_realize(area_top_left);
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gtk_widget_realize(area_top_right);
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GstBus* bus = gst_pipeline_get_bus (GST_PIPELINE (pipeline));
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gst_bus_set_sync_handler (bus, (GstBusSyncHandler) create_window, area_top_right, NULL);
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gst_bus_add_signal_watch (bus);
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g_signal_connect(bus, "message::error", G_CALLBACK(end_stream_cb), pipeline);
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g_signal_connect(bus, "message::warning", G_CALLBACK(end_stream_cb), pipeline);
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g_signal_connect(bus, "message::eos", G_CALLBACK(end_stream_cb), pipeline);
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gst_object_unref (bus);
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//needed when being in GST_STATE_READY, GST_STATE_PAUSED
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//or resizing/obscuring the window
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g_signal_connect(area_top_left, "draw", G_CALLBACK(expose_cb), videosink);
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g_signal_connect(area_top_left, "configure-event", G_CALLBACK(resize_cb), videosink);
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g_signal_connect(area_top_right, "draw", G_CALLBACK(expose_cb), videosink);
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g_signal_connect(area_top_right, "configure-event", G_CALLBACK(resize_cb), videosink);
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//switch the drawing area
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g_signal_connect(area_top_left, "button-press-event", G_CALLBACK(on_click_drawing_area), videosink);
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g_signal_connect(area_top_right, "button-press-event", G_CALLBACK(on_click_drawing_area), videosink);
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gtk_widget_show_all (window);
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gst_element_set_state(pipeline, GST_STATE_PLAYING);
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gtk_main();
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return 0;
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}
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