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5b8d7a443e
Allows callers to properly reference count the buffers used for rendering. Fixes a redraw race in glimagesink where the previous buffer (the one used for redraw operations) is freed as soon as the next buffer is uploaded. 1. glimagesink uploads in _prepare() to texture n 1.1 glupload holds buffer n 2. glimagesink _render()s texture n 3. glimagesink uploads texture n+1 3.1 glupload free previous buffer which deletes texture n 3.2 glupload holds buffer n+1 4. glwindow resize/expose 5. glimagesink redraws with texture n The race is that the buffer n (the one used for redrawing) is freed as soon as the buffer n+1 arrives. There could be any amount of time and number of redraws between this event and when buffer n+1 is actually rendered and thus replaces buffer n as the redraw source. https://bugzilla.gnome.org/show_bug.cgi?id=736740
102 lines
2.6 KiB
C
102 lines
2.6 KiB
C
/*
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* GStreamer
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* Copyright (C) 2003 Julien Moutte <julien@moutte.net>
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* Copyright (C) 2005,2006,2007 David A. Schleef <ds@schleef.org>
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* Copyright (C) 2008 Julien Isorce <julien.isorce@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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#ifndef _GLIMAGESINK_H_
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#define _GLIMAGESINK_H_
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#include <gst/gst.h>
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#include <gst/video/gstvideosink.h>
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#include <gst/video/video.h>
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#include <gst/gl/gl.h>
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G_BEGIN_DECLS
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GST_DEBUG_CATEGORY_EXTERN (gst_debug_glimage_sink);
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#define GST_TYPE_GLIMAGE_SINK \
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(gst_glimage_sink_get_type())
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#define GST_GLIMAGE_SINK(obj) \
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(G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_GLIMAGE_SINK,GstGLImageSink))
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#define GST_GLIMAGE_SINK_CLASS(klass) \
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(G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_GLIMAGE_SINK,GstGLImageSinkClass))
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#define GST_IS_GLIMAGE_SINK(obj) \
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(G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_GLIMAGE_SINK))
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#define GST_IS_GLIMAGE_SINK_CLASS(klass) \
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(G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_GLIMAGE_SINK))
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typedef struct _GstGLImageSink GstGLImageSink;
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typedef struct _GstGLImageSinkClass GstGLImageSinkClass;
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struct _GstGLImageSink
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{
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GstVideoSink video_sink;
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//properties
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gchar *display_name;
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guintptr window_id;
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guintptr new_window_id;
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gulong mouse_sig_id;
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gulong key_sig_id;
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//caps
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GstVideoInfo info;
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GstGLDisplay *display;
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GstGLContext *context;
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GstGLContext *other_context;
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GstGLUpload *upload;
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guint next_tex;
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GstBuffer *next_buffer;
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volatile gint to_quit;
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gboolean keep_aspect_ratio;
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gint par_n, par_d;
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GstBufferPool *pool;
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/* avoid replacing the stored_buffer while drawing */
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GMutex drawing_lock;
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GstBuffer *stored_buffer;
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GLuint redisplay_texture;
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#if GST_GL_HAVE_GLES2
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GstGLShader *redisplay_shader;
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GLint redisplay_attr_position_loc;
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GLint redisplay_attr_texture_loc;
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#endif
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};
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struct _GstGLImageSinkClass
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{
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GstVideoSinkClass video_sink_class;
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};
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GType gst_glimage_sink_get_type(void);
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G_END_DECLS
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#endif
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