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2551b1d976
... and add gst_video_center_rect() method as a replacement. The method is useful for outside of videosink subclasses as well but the old naming might be able to mislead people. Part-of: <https://gitlab.freedesktop.org/gstreamer/gst-plugins-base/-/merge_requests/1156>
153 lines
4.7 KiB
C
153 lines
4.7 KiB
C
/* GStreamer video sink base class
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* Copyright (C) <2003> Julien Moutte <julien@moutte.net>
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* Copyright (C) <2009> Tim-Philipp Müller <tim centricular net>
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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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/* FIXME 0.11: turn this into a proper base class */
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#ifndef __GST_VIDEO_SINK_H__
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#define __GST_VIDEO_SINK_H__
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#include <gst/gst.h>
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#include <gst/base/gstbasesink.h>
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#include <gst/video/video-prelude.h>
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#include <gst/video/video-info.h>
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G_BEGIN_DECLS
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#define GST_TYPE_VIDEO_SINK (gst_video_sink_get_type())
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#define GST_VIDEO_SINK(obj) \
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(G_TYPE_CHECK_INSTANCE_CAST ((obj), GST_TYPE_VIDEO_SINK, GstVideoSink))
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#define GST_VIDEO_SINK_CLASS(klass) \
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(G_TYPE_CHECK_CLASS_CAST ((klass), GST_TYPE_VIDEO_SINK, GstVideoSinkClass))
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#define GST_IS_VIDEO_SINK(obj) \
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(G_TYPE_CHECK_INSTANCE_TYPE ((obj), GST_TYPE_VIDEO_SINK))
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#define GST_IS_VIDEO_SINK_CLASS(klass) \
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(G_TYPE_CHECK_CLASS_TYPE ((klass), GST_TYPE_VIDEO_SINK))
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#define GST_VIDEO_SINK_GET_CLASS(klass) \
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(G_TYPE_INSTANCE_GET_CLASS ((klass), GST_TYPE_VIDEO_SINK, GstVideoSinkClass))
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/**
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* GST_VIDEO_SINK_CAST:
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* @obj: a #GstVideoSink or derived object
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*
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* Cast @obj to a #GstVideoSink without runtime type check.
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*/
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#define GST_VIDEO_SINK_CAST(obj) ((GstVideoSink *) (obj))
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/**
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* GST_VIDEO_SINK_PAD:
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* @obj: a #GstVideoSink
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*
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* Get the sink #GstPad of @obj.
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*/
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#define GST_VIDEO_SINK_PAD(obj) GST_BASE_SINK_PAD(obj)
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#define GST_VIDEO_SINK_WIDTH(obj) (GST_VIDEO_SINK_CAST (obj)->width)
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#define GST_VIDEO_SINK_HEIGHT(obj) (GST_VIDEO_SINK_CAST (obj)->height)
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typedef struct _GstVideoSink GstVideoSink;
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typedef struct _GstVideoSinkClass GstVideoSinkClass;
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typedef struct _GstVideoRectangle GstVideoRectangle;
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typedef struct _GstVideoSinkPrivate GstVideoSinkPrivate;
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/**
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* GstVideoRectangle:
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* @x: X coordinate of rectangle's top-left point
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* @y: Y coordinate of rectangle's top-left point
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* @w: width of the rectangle
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* @h: height of the rectangle
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*
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* Helper structure representing a rectangular area.
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*/
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struct _GstVideoRectangle {
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gint x;
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gint y;
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gint w;
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gint h;
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};
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/**
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* GstVideoSink:
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* @height: video height (derived class needs to set this)
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* @width: video width (derived class needs to set this)
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*
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* The video sink instance structure. Derived video sinks should set the
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* @height and @width members.
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*/
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struct _GstVideoSink {
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GstBaseSink element; /* FIXME 0.11: this should not be called 'element' */
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/*< public >*/
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gint width, height;
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/*< private >*/
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GstVideoSinkPrivate *priv;
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gpointer _gst_reserved[GST_PADDING];
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};
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/**
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* GstVideoSinkClass:
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* @parent_class: the parent class structure
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* @show_frame: render a video frame. Maps to #GstBaseSinkClass.render() and
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* #GstBaseSinkClass.preroll() vfuncs. Rendering during preroll will be
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* suppressed if the #GstVideoSink:show-preroll-frame property is set to
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* %FALSE.
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*
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* The video sink class structure. Derived classes should override the
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* @show_frame virtual function.
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*/
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struct _GstVideoSinkClass {
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GstBaseSinkClass parent_class;
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GstFlowReturn (*show_frame) (GstVideoSink *video_sink, GstBuffer *buf);
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/**
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* GstVideoSinkClass::set_info:
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* @caps: A #GstCaps.
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* @info: A #GstVideoInfo corresponding to @caps.
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*
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* Notifies the subclass of changed #GstVideoInfo.
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*
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* Since: 1.20
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*/
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gboolean (*set_info) (GstVideoSink *video_sink, GstCaps *caps, const GstVideoInfo *info);
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/*< private >*/
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gpointer _gst_reserved[GST_PADDING-1];
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};
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GST_VIDEO_API
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GType gst_video_sink_get_type (void);
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GST_VIDEO_DEPRECATED_FOR(gst_video_center_rect)
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void gst_video_sink_center_rect (GstVideoRectangle src, GstVideoRectangle dst,
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GstVideoRectangle *result, gboolean scaling);
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GST_VIDEO_API
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void gst_video_center_rect (const GstVideoRectangle * src,
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const GstVideoRectangle * dst,
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GstVideoRectangle * result,
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gboolean scaling);
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G_DEFINE_AUTOPTR_CLEANUP_FUNC(GstVideoSink, gst_object_unref)
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G_END_DECLS
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#endif /* __GST_VIDEO_SINK_H__ */
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