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https://github.com/Rafostar/clapper.git
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f351982067
Add support for premultiplied alpha flag detection when creating GdkMemoryTextures. Also check if overlays have premultiplied alpha and if they do set this flag for their video info, so it will be detected when creating a GdkMemoryTexture out of them. Fixes performance issues with karaoke subtitles, as now GTK does not have to perform unnecessary multiplication.
143 lines
4.0 KiB
C
Vendored
143 lines
4.0 KiB
C
Vendored
/*
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* GStreamer
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* Copyright (C) 2015 Matthew Waters <matthew@centricular.com>
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* Copyright (C) 2015 Thibault Saunier <tsaunier@gnome.org>
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* Copyright (C) 2022 Rafał Dzięgiel <rafostar.github@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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#include "gstgtkutils.h"
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#define _IS_FRAME_PREMULTIPLIED(f) (GST_VIDEO_INFO_FLAG_IS_SET (&(f)->info, GST_VIDEO_FLAG_PREMULTIPLIED_ALPHA))
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struct invoke_context
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{
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GThreadFunc func;
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gpointer data;
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GMutex lock;
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GCond cond;
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gboolean fired;
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gpointer res;
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};
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static gboolean
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gst_gtk_invoke_func (struct invoke_context *info)
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{
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g_mutex_lock (&info->lock);
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info->res = info->func (info->data);
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info->fired = TRUE;
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g_cond_signal (&info->cond);
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g_mutex_unlock (&info->lock);
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return G_SOURCE_REMOVE;
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}
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gpointer
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gst_gtk_invoke_on_main (GThreadFunc func, gpointer data)
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{
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GMainContext *main_context = g_main_context_default ();
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struct invoke_context info;
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g_mutex_init (&info.lock);
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g_cond_init (&info.cond);
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info.fired = FALSE;
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info.func = func;
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info.data = data;
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g_main_context_invoke (main_context, (GSourceFunc) gst_gtk_invoke_func,
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&info);
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g_mutex_lock (&info.lock);
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while (!info.fired)
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g_cond_wait (&info.cond, &info.lock);
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g_mutex_unlock (&info.lock);
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g_mutex_clear (&info.lock);
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g_cond_clear (&info.cond);
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return info.res;
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}
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static GdkMemoryFormat
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gst_gdk_memory_format_from_frame (GstVideoFrame *frame)
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{
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switch (GST_VIDEO_FRAME_FORMAT (frame)) {
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case GST_VIDEO_FORMAT_RGBA64_LE:
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case GST_VIDEO_FORMAT_RGBA64_BE:
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return (_IS_FRAME_PREMULTIPLIED (frame))
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? GDK_MEMORY_R16G16B16A16_PREMULTIPLIED
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: GDK_MEMORY_R16G16B16A16;
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case GST_VIDEO_FORMAT_RGBA:
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return (_IS_FRAME_PREMULTIPLIED (frame))
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? GDK_MEMORY_R8G8B8A8_PREMULTIPLIED
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: GDK_MEMORY_R8G8B8A8;
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case GST_VIDEO_FORMAT_BGRA:
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return (_IS_FRAME_PREMULTIPLIED (frame))
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? GDK_MEMORY_B8G8R8A8_PREMULTIPLIED
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: GDK_MEMORY_B8G8R8A8;
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case GST_VIDEO_FORMAT_ARGB:
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return (_IS_FRAME_PREMULTIPLIED (frame))
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? GDK_MEMORY_A8R8G8B8_PREMULTIPLIED
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: GDK_MEMORY_A8R8G8B8;
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case GST_VIDEO_FORMAT_ABGR:
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/* GTK is missing premultiplied ABGR support */
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return GDK_MEMORY_A8B8G8R8;
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case GST_VIDEO_FORMAT_RGBx:
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return GDK_MEMORY_R8G8B8A8_PREMULTIPLIED;
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case GST_VIDEO_FORMAT_BGRx:
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return GDK_MEMORY_B8G8R8A8_PREMULTIPLIED;
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case GST_VIDEO_FORMAT_RGB:
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return GDK_MEMORY_R8G8B8;
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case GST_VIDEO_FORMAT_BGR:
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return GDK_MEMORY_B8G8R8;
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default:
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break;
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}
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/* This should never happen as long as above switch statement
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* is updated when new formats are added to caps */
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g_assert_not_reached ();
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/* Fallback format */
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return GDK_MEMORY_R8G8B8A8_PREMULTIPLIED;
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}
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GdkTexture *
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gst_video_frame_into_gdk_texture (GstVideoFrame *frame)
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{
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GdkTexture *texture;
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GBytes *bytes;
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bytes = g_bytes_new_with_free_func (
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GST_VIDEO_FRAME_PLANE_DATA (frame, 0),
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GST_VIDEO_FRAME_HEIGHT (frame) * GST_VIDEO_FRAME_PLANE_STRIDE (frame, 0),
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(GDestroyNotify) gst_buffer_unref,
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gst_buffer_ref (frame->buffer));
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texture = gdk_memory_texture_new (
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GST_VIDEO_FRAME_WIDTH (frame),
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GST_VIDEO_FRAME_HEIGHT (frame),
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gst_gdk_memory_format_from_frame (frame),
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bytes,
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GST_VIDEO_FRAME_PLANE_STRIDE (frame, 0));
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g_bytes_unref (bytes);
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return texture;
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}
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