From 7c4d198b5e5024f70ef4b566b34bd15905c69406 Mon Sep 17 00:00:00 2001
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From: Randy Li <ayaka@soulik.info>
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Date: Thu, 29 Oct 2020 06:13:05 +0000
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Subject: [PATCH 02/40] waylandsink: release frame callback when destroyed
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We would use a frame callback from the surface to indicate
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that last buffer is rendered, but when we destroy the surface
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and that callback is not back yet, it may cause the wayland event
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queue crash.
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Part-of: <https://gitlab.freedesktop.org/gstreamer/gst-plugins-bad/-/merge_requests/1729>
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(cherry picked from commit 6d8133e41e3e2c2f2bc65e22675a4c68a8539ac8)
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Signed-off-by: Jeffy Chen <jeffy.chen@rock-chips.com>
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---
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ext/wayland/gstwaylandsink.c | 2 ++
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ext/wayland/wlwindow.c | 4 ++++
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ext/wayland/wlwindow.h | 1 +
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3 files changed, 7 insertions(+)
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diff --git a/ext/wayland/gstwaylandsink.c b/ext/wayland/gstwaylandsink.c
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index 8c6fdd0..47192df 100644
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--- a/ext/wayland/gstwaylandsink.c
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+++ b/ext/wayland/gstwaylandsink.c
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@@ -637,6 +637,7 @@ frame_redraw_callback (void *data, struct wl_callback *callback, uint32_t time)
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g_mutex_lock (&sink->render_lock);
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sink->redraw_pending = FALSE;
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+ sink->window->callback = NULL;
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g_mutex_unlock (&sink->render_lock);
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wl_callback_destroy (callback);
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@@ -660,6 +661,7 @@ render_last_buffer (GstWaylandSink * sink, gboolean redraw)
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sink->redraw_pending = TRUE;
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callback = wl_surface_frame (surface);
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+ sink->window->callback = callback;
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wl_callback_add_listener (callback, &frame_callback_listener, sink);
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if (G_UNLIKELY (sink->video_info_changed && !redraw)) {
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diff --git a/ext/wayland/wlwindow.c b/ext/wayland/wlwindow.c
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index 66a05be..2a09b93 100644
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--- a/ext/wayland/wlwindow.c
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+++ b/ext/wayland/wlwindow.c
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@@ -157,6 +157,9 @@ gst_wl_window_finalize (GObject * gobject)
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{
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GstWlWindow *self = GST_WL_WINDOW (gobject);
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+ if (self->callback)
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+ wl_callback_destroy (self->callback);
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+
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if (self->wl_shell_surface)
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wl_shell_surface_destroy (self->wl_shell_surface);
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@@ -197,6 +200,7 @@ gst_wl_window_new_internal (GstWlDisplay * display, GMutex * render_lock)
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window->render_lock = render_lock;
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g_cond_init (&window->configure_cond);
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+ window->callback = NULL;
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window->area_surface = wl_compositor_create_surface (display->compositor);
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window->video_surface = wl_compositor_create_surface (display->compositor);
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diff --git a/ext/wayland/wlwindow.h b/ext/wayland/wlwindow.h
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index c3f0172..cecbda6 100644
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--- a/ext/wayland/wlwindow.h
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+++ b/ext/wayland/wlwindow.h
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@@ -55,6 +55,7 @@ struct _GstWlWindow
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struct wl_shell_surface *wl_shell_surface;
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struct xdg_surface *xdg_surface;
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struct xdg_toplevel *xdg_toplevel;
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+ struct wl_callback *callback;
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gboolean configured;
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GCond configure_cond;
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GMutex configure_mutex;
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--
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2.17.1
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