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fb44ea8a85
For an operation like synchronizing audio to video playback, we need to be able to predict the time that a frame will be presented. The details of this depend on the windowing system, so make the backend predict a presentation time for ::begin-frame and set it on the GdkFrameTimings. The timing algorithm of GdkFrameClockIdle is adjusted to give predictable presentation times for frames that are not throttled by the windowing system. Helper functions: gdk_frame_clock_get_current_frame_timings() gdk_frame_clock_get_refresh_info() are added for operations that would otherwise be needed multiple times in different locations. https://bugzilla.gnome.org/show_bug.cgi?id=685460
278 lines
6.2 KiB
C
278 lines
6.2 KiB
C
/* GDK - The GIMP Drawing Kit
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* Copyright (C) 2012 Red Hat, Inc.
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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 Lesser 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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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "config.h"
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#include "gdkframetimings.h"
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struct _GdkFrameTimings
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{
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guint ref_count;
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gint64 frame_counter;
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guint64 cookie;
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gint64 frame_time;
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gint64 drawn_time;
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gint64 presentation_time;
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gint64 refresh_interval;
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gint64 predicted_presentation_time;
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#ifdef G_ENABLE_DEBUG
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gint64 layout_start_time;
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gint64 paint_start_time;
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gint64 frame_end_time;
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#endif /* G_ENABLE_DEBUG */
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guint complete : 1;
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guint slept_before : 1;
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};
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G_DEFINE_BOXED_TYPE (GdkFrameTimings, gdk_frame_timings,
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gdk_frame_timings_ref,
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gdk_frame_timings_unref)
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GdkFrameTimings *
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gdk_frame_timings_new (gint64 frame_counter)
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{
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GdkFrameTimings *timings;
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timings = g_slice_new0 (GdkFrameTimings);
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timings->ref_count = 1;
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timings->frame_counter = frame_counter;
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return timings;
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}
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GdkFrameTimings *
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gdk_frame_timings_ref (GdkFrameTimings *timings)
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{
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g_return_val_if_fail (timings != NULL, NULL);
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timings->ref_count++;
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return timings;
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}
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void
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gdk_frame_timings_unref (GdkFrameTimings *timings)
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{
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g_return_if_fail (timings != NULL);
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g_return_if_fail (timings->ref_count > 0);
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timings->ref_count--;
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if (timings->ref_count == 0)
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{
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g_slice_free (GdkFrameTimings, timings);
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}
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}
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gint64
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gdk_frame_timings_get_frame_counter (GdkFrameTimings *timings)
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{
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return timings->frame_counter;
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}
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guint64
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gdk_frame_timings_get_cookie (GdkFrameTimings *timings)
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{
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g_return_val_if_fail (timings != NULL, 0);
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return timings->cookie;
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}
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void
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gdk_frame_timings_set_cookie (GdkFrameTimings *timings,
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guint64 cookie)
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{
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g_return_if_fail (timings != NULL);
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timings->cookie = cookie;
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}
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gboolean
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gdk_frame_timings_get_complete (GdkFrameTimings *timings)
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{
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g_return_val_if_fail (timings != NULL, FALSE);
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return timings->complete;
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}
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void
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gdk_frame_timings_set_complete (GdkFrameTimings *timings,
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gboolean complete)
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{
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g_return_if_fail (timings != NULL);
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timings->complete = complete;
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}
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gboolean
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gdk_frame_timings_get_slept_before (GdkFrameTimings *timings)
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{
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g_return_val_if_fail (timings != NULL, FALSE);
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return timings->slept_before;
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}
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void
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gdk_frame_timings_set_slept_before (GdkFrameTimings *timings,
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gboolean slept_before)
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{
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g_return_if_fail (timings != NULL);
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timings->slept_before = slept_before;
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}
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gint64
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gdk_frame_timings_get_frame_time (GdkFrameTimings *timings)
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{
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g_return_val_if_fail (timings != NULL, 0);
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return timings->frame_time;
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}
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void
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gdk_frame_timings_set_frame_time (GdkFrameTimings *timings,
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gint64 frame_time)
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{
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g_return_if_fail (timings != NULL);
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timings->frame_time = frame_time;
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}
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gint64
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gdk_frame_timings_get_drawn_time (GdkFrameTimings *timings)
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{
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g_return_val_if_fail (timings != NULL, 0);
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return timings->drawn_time;
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}
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void
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gdk_frame_timings_set_drawn_time (GdkFrameTimings *timings,
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gint64 drawn_time)
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{
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g_return_if_fail (timings != NULL);
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timings->drawn_time = drawn_time;
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}
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gint64
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gdk_frame_timings_get_presentation_time (GdkFrameTimings *timings)
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{
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g_return_val_if_fail (timings != NULL, 0);
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return timings->presentation_time;
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}
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void
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gdk_frame_timings_set_presentation_time (GdkFrameTimings *timings,
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gint64 presentation_time)
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{
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g_return_if_fail (timings != NULL);
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timings->presentation_time = presentation_time;
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}
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gint64
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gdk_frame_timings_get_predicted_presentation_time (GdkFrameTimings *timings)
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{
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g_return_val_if_fail (timings != NULL, 0);
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return timings->predicted_presentation_time;
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}
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void
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gdk_frame_timings_set_predicted_presentation_time (GdkFrameTimings *timings,
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gint64 predicted_presentation_time)
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{
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g_return_if_fail (timings != NULL);
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timings->predicted_presentation_time = predicted_presentation_time;
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}
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gint64
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gdk_frame_timings_get_refresh_interval (GdkFrameTimings *timings)
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{
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g_return_val_if_fail (timings != NULL, 0);
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return timings->refresh_interval;
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}
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void
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gdk_frame_timings_set_refresh_interval (GdkFrameTimings *timings,
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gint64 refresh_interval)
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{
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g_return_if_fail (timings != NULL);
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timings->refresh_interval = refresh_interval;
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}
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#ifdef G_ENABLE_DEBUG
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gint64
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_gdk_frame_timings_get_layout_start_time (GdkFrameTimings *timings)
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{
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g_return_val_if_fail (timings != NULL, 0);
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return timings->layout_start_time;
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}
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void
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_gdk_frame_timings_set_layout_start_time (GdkFrameTimings *timings,
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gint64 layout_start_time)
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{
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g_return_if_fail (timings != NULL);
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timings->layout_start_time = layout_start_time;
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}
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gint64
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_gdk_frame_timings_get_paint_start_time (GdkFrameTimings *timings)
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{
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g_return_val_if_fail (timings != NULL, 0);
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return timings->paint_start_time;
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}
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void
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_gdk_frame_timings_set_paint_start_time (GdkFrameTimings *timings,
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gint64 paint_start_time)
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{
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g_return_if_fail (timings != NULL);
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timings->paint_start_time = paint_start_time;
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}
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gint64
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_gdk_frame_timings_get_frame_end_time (GdkFrameTimings *timings)
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{
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g_return_val_if_fail (timings != NULL, 0);
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return timings->frame_end_time;
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}
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void
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_gdk_frame_timings_set_frame_end_time (GdkFrameTimings *timings,
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gint64 frame_end_time)
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{
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g_return_if_fail (timings != NULL);
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timings->frame_end_time = frame_end_time;
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}
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#endif /* G_ENABLE_DEBUG */
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