| /* GStreamer Wayland video sink |
| * |
| * Copyright (C) 2014 Collabora Ltd. |
| * |
| * This library is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU Library General Public |
| * License as published by the Free Software Foundation; either |
| * version 2 of the License, or (at your option) any later version. |
| * |
| * This library is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| * Library General Public License for more details. |
| * |
| * You should have received a copy of the GNU Library General Public |
| * License along with this library; if not, write to the Free |
| * Software Foundation, Inc., 51 Franklin Street, Fifth Floor, |
| * Boston, MA 02110-1301 USA. |
| */ |
| |
| #ifdef HAVE_CONFIG_H |
| #include <config.h> |
| #endif |
| |
| #include "wldisplay.h" |
| |
| #include <errno.h> |
| |
| GST_DEBUG_CATEGORY_EXTERN (gstwayland_debug); |
| #define GST_CAT_DEFAULT gstwayland_debug |
| |
| G_DEFINE_TYPE (GstWlDisplay, gst_wl_display, G_TYPE_OBJECT); |
| |
| static void gst_wl_display_finalize (GObject * gobject); |
| |
| static void |
| gst_wl_display_class_init (GstWlDisplayClass * klass) |
| { |
| GObjectClass *gobject_class = G_OBJECT_CLASS (klass); |
| gobject_class->finalize = gst_wl_display_finalize; |
| } |
| |
| static void |
| gst_wl_display_init (GstWlDisplay * self) |
| { |
| self->formats = g_array_new (FALSE, FALSE, sizeof (uint32_t)); |
| self->wl_fd_poll = gst_poll_new (TRUE); |
| } |
| |
| static void |
| gst_wl_display_finalize (GObject * gobject) |
| { |
| GstWlDisplay *self = GST_WL_DISPLAY (gobject); |
| |
| gst_poll_set_flushing (self->wl_fd_poll, TRUE); |
| |
| if (self->thread) |
| g_thread_join (self->thread); |
| |
| g_array_unref (self->formats); |
| gst_poll_free (self->wl_fd_poll); |
| |
| if (self->shm) |
| wl_shm_destroy (self->shm); |
| |
| if (self->shell) |
| wl_shell_destroy (self->shell); |
| |
| if (self->compositor) |
| wl_compositor_destroy (self->compositor); |
| |
| if (self->subcompositor) |
| wl_subcompositor_destroy (self->subcompositor); |
| |
| if (self->registry) |
| wl_registry_destroy (self->registry); |
| |
| if (self->queue) |
| wl_event_queue_destroy (self->queue); |
| |
| if (self->own_display) { |
| wl_display_flush (self->display); |
| wl_display_disconnect (self->display); |
| } |
| |
| G_OBJECT_CLASS (gst_wl_display_parent_class)->finalize (gobject); |
| } |
| |
| static void |
| sync_callback (void *data, struct wl_callback *callback, uint32_t serial) |
| { |
| gboolean *done = data; |
| *done = TRUE; |
| } |
| |
| static const struct wl_callback_listener sync_listener = { |
| sync_callback |
| }; |
| |
| static gint |
| gst_wl_display_roundtrip (GstWlDisplay * self) |
| { |
| struct wl_callback *callback; |
| gint ret = 0; |
| gboolean done = FALSE; |
| |
| g_return_val_if_fail (self != NULL, -1); |
| |
| /* We don't own the display, process only our queue */ |
| callback = wl_display_sync (self->display); |
| wl_callback_add_listener (callback, &sync_listener, &done); |
| wl_proxy_set_queue ((struct wl_proxy *) callback, self->queue); |
| while (ret != -1 && !done) |
| ret = wl_display_dispatch_queue (self->display, self->queue); |
| wl_callback_destroy (callback); |
| |
| return ret; |
| } |
| |
| static void |
| shm_format (void *data, struct wl_shm *wl_shm, uint32_t format) |
| { |
| GstWlDisplay *self = data; |
| |
| g_array_append_val (self->formats, format); |
| } |
| |
| static const struct wl_shm_listener shm_listener = { |
| shm_format |
| }; |
| |
| static void |
| registry_handle_global (void *data, struct wl_registry *registry, |
| uint32_t id, const char *interface, uint32_t version) |
| { |
| GstWlDisplay *self = data; |
| |
| if (g_strcmp0 (interface, "wl_compositor") == 0) { |
| self->compositor = wl_registry_bind (registry, id, &wl_compositor_interface, |
| MIN (version, 3)); |
| } else if (g_strcmp0 (interface, "wl_subcompositor") == 0) { |
| self->subcompositor = |
| wl_registry_bind (registry, id, &wl_subcompositor_interface, 1); |
| } else if (g_strcmp0 (interface, "wl_shell") == 0) { |
| self->shell = wl_registry_bind (registry, id, &wl_shell_interface, 1); |
| } else if (g_strcmp0 (interface, "wl_shm") == 0) { |
| self->shm = wl_registry_bind (registry, id, &wl_shm_interface, 1); |
| wl_shm_add_listener (self->shm, &shm_listener, self); |
| } else if (g_strcmp0 (interface, "wl_scaler") == 0) { |
| self->scaler = wl_registry_bind (registry, id, &wl_scaler_interface, 2); |
| } |
| } |
| |
| static const struct wl_registry_listener registry_listener = { |
| registry_handle_global |
| }; |
| |
| static gpointer |
| gst_wl_display_thread_run (gpointer data) |
| { |
| GstWlDisplay *self = data; |
| GstPollFD pollfd = GST_POLL_FD_INIT; |
| |
| pollfd.fd = wl_display_get_fd (self->display); |
| gst_poll_add_fd (self->wl_fd_poll, &pollfd); |
| gst_poll_fd_ctl_read (self->wl_fd_poll, &pollfd, TRUE); |
| |
| /* main loop */ |
| while (1) { |
| while (wl_display_prepare_read_queue (self->display, self->queue) != 0) |
| wl_display_dispatch_queue_pending (self->display, self->queue); |
| wl_display_flush (self->display); |
| |
| if (gst_poll_wait (self->wl_fd_poll, GST_CLOCK_TIME_NONE) < 0) { |
| gboolean normal = (errno == EBUSY); |
| wl_display_cancel_read (self->display); |
| if (normal) |
| break; |
| else |
| goto error; |
| } else { |
| wl_display_read_events (self->display); |
| wl_display_dispatch_queue_pending (self->display, self->queue); |
| } |
| } |
| |
| return NULL; |
| |
| error: |
| GST_ERROR ("Error communicating with the wayland server"); |
| return NULL; |
| } |
| |
| GstWlDisplay * |
| gst_wl_display_new (const gchar * name, GError ** error) |
| { |
| struct wl_display *display; |
| |
| display = wl_display_connect (name); |
| |
| if (!display) { |
| *error = g_error_new (g_quark_from_static_string ("GstWlDisplay"), 0, |
| "Failed to connect to the wayland display '%s'", |
| name ? name : "(default)"); |
| return NULL; |
| } else { |
| return gst_wl_display_new_existing (display, TRUE, error); |
| } |
| } |
| |
| GstWlDisplay * |
| gst_wl_display_new_existing (struct wl_display * display, |
| gboolean take_ownership, GError ** error) |
| { |
| GstWlDisplay *self; |
| GError *err = NULL; |
| gint i; |
| |
| g_return_val_if_fail (display != NULL, NULL); |
| |
| self = g_object_new (GST_TYPE_WL_DISPLAY, NULL); |
| self->display = display; |
| self->own_display = take_ownership; |
| |
| self->queue = wl_display_create_queue (self->display); |
| self->registry = wl_display_get_registry (self->display); |
| wl_proxy_set_queue ((struct wl_proxy *) self->registry, self->queue); |
| wl_registry_add_listener (self->registry, ®istry_listener, self); |
| |
| /* we need exactly 2 roundtrips to discover global objects and their state */ |
| for (i = 0; i < 2; i++) { |
| if (gst_wl_display_roundtrip (self) < 0) { |
| *error = g_error_new (g_quark_from_static_string ("GstWlDisplay"), 0, |
| "Error communicating with the wayland display"); |
| g_object_unref (self); |
| return NULL; |
| } |
| } |
| |
| /* verify we got all the required interfaces */ |
| #define VERIFY_INTERFACE_EXISTS(var, interface) \ |
| if (!self->var) { \ |
| g_set_error (error, g_quark_from_static_string ("GstWlDisplay"), 0, \ |
| "Could not bind to " interface ". Either it is not implemented in " \ |
| "the compositor, or the implemented version doesn't match"); \ |
| g_object_unref (self); \ |
| return NULL; \ |
| } |
| |
| VERIFY_INTERFACE_EXISTS (compositor, "wl_compositor"); |
| VERIFY_INTERFACE_EXISTS (subcompositor, "wl_subcompositor"); |
| VERIFY_INTERFACE_EXISTS (shell, "wl_shell"); |
| VERIFY_INTERFACE_EXISTS (shm, "wl_shm"); |
| VERIFY_INTERFACE_EXISTS (scaler, "wl_scaler"); |
| |
| #undef VERIFY_INTERFACE_EXISTS |
| |
| self->thread = g_thread_try_new ("GstWlDisplay", gst_wl_display_thread_run, |
| self, &err); |
| if (err) { |
| g_propagate_prefixed_error (error, err, |
| "Failed to start thread for the display's events"); |
| g_object_unref (self); |
| return NULL; |
| } |
| |
| return self; |
| } |