mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
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166 lines
4.1 KiB
C
166 lines
4.1 KiB
C
/*
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* GStreamer
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* Copyright (C) 2010 Intel Corporation.
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* Copyright (C) 2012 Matthew Waters <ystreet00@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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* Authors:
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* Matthew Allum
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* Robert Bragg
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* Kristian Høgsberg
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*/
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/* code originally from clutter's wayland backend found here
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* http://git.gnome.org/browse/clutter/tree/clutter/wayland/clutter-event-wayland.c
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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 <stdint.h>
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#include <stdlib.h>
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#include <wayland-client.h>
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#include <gst/gst.h>
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#include "wayland_event_source.h"
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#define GST_CAT_DEFAULT gst_gl_wayland_event_source_debug
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GST_DEBUG_CATEGORY_STATIC (GST_CAT_DEFAULT);
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static void
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init_debug (void)
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{
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static gsize _debug;
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if (g_once_init_enter (&_debug)) {
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GST_DEBUG_CATEGORY_INIT (GST_CAT_DEFAULT, "glwaylandeventsource", 0,
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"OpenGL Wayland event source");
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g_once_init_leave (&_debug, 1);
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}
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}
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typedef struct _WaylandEventSource
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{
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GSource source;
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GPollFD pfd;
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uint32_t mask;
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struct wl_display *display;
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struct wl_event_queue *queue;
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gboolean reading;
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} WaylandEventSource;
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static gboolean
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wayland_event_source_prepare (GSource * base, gint * timeout)
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{
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WaylandEventSource *source = (WaylandEventSource *) base;
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*timeout = -1;
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/* we may be called multiple times for prepare */
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if (source->reading)
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wl_display_cancel_read (source->display);
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if (source->queue) {
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if (wl_display_prepare_read_queue (source->display, source->queue) != 0)
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return TRUE;
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} else {
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if (wl_display_prepare_read (source->display) != 0)
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return TRUE;
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}
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source->reading = TRUE;
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/* FIXME: this may return EAGAIN if the fd is full */
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if (wl_display_flush (source->display) < 0)
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g_critical ("Failed to flush Wayland connection\n");
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return FALSE;
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}
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static gboolean
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wayland_event_source_check (GSource * base)
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{
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WaylandEventSource *source = (WaylandEventSource *) base;
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source->reading = FALSE;
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if (source->pfd.revents & G_IO_IN) {
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if (wl_display_read_events (source->display) == 0)
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return TRUE;
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} else {
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wl_display_cancel_read (source->display);
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}
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return FALSE;
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}
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static gboolean
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wayland_event_source_dispatch (GSource * base,
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GSourceFunc callback, gpointer data)
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{
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WaylandEventSource *source = (WaylandEventSource *) base;
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if (source->queue) {
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wl_display_dispatch_queue_pending (source->display, source->queue);
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} else {
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wl_display_dispatch_pending (source->display);
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}
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source->pfd.revents = 0;
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if (callback)
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callback (data);
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return TRUE;
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}
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static void
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wayland_event_source_finalize (GSource * base)
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{
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WaylandEventSource *source = (WaylandEventSource *) base;
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if (source->reading) {
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wl_display_cancel_read (source->display);
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}
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source->reading = FALSE;
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}
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static GSourceFuncs wayland_event_source_funcs = {
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wayland_event_source_prepare,
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wayland_event_source_check,
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wayland_event_source_dispatch,
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wayland_event_source_finalize
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};
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GSource *
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wayland_event_source_new (struct wl_display *display,
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struct wl_event_queue *queue)
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{
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WaylandEventSource *source;
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init_debug ();
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source = (WaylandEventSource *)
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g_source_new (&wayland_event_source_funcs, sizeof (WaylandEventSource));
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source->display = display;
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source->queue = queue;
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source->pfd.fd = wl_display_get_fd (display);
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source->pfd.events = G_IO_IN | G_IO_ERR;
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g_source_add_poll (&source->source, &source->pfd);
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return &source->source;
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}
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