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260 lines
11 KiB
C
260 lines
11 KiB
C
/* GStreamer Video Overlay Composition
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* Copyright (C) 2011 Intel Corporation
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* Copyright (C) 2011 Collabora Ltd.
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* Copyright (C) 2011 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., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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#ifndef __GST_VIDEO_OVERLAY_COMPOSITION_H__
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#define __GST_VIDEO_OVERLAY_COMPOSITION_H__
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#include <gst/gst.h>
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#include <gst/video/video.h>
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G_BEGIN_DECLS
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/**
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* GstVideoOverlayRectangle:
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*
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* An opaque video overlay rectangle object. A rectangle contains a single
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* overlay rectangle which can be added to a composition.
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*/
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#define GST_TYPE_VIDEO_OVERLAY_RECTANGLE \
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(gst_video_overlay_rectangle_get_type ())
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#define GST_VIDEO_OVERLAY_RECTANGLE_CAST(obj) \
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((GstVideoOverlayRectangle *)(obj)
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#define GST_VIDEO_OVERLAY_RECTANGLE(obj) \
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(GST_VIDEO_OVERLAY_RECTANGLE_CAST(obj))
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#define GST_IS_VIDEO_OVERLAY_RECTANGLE(obj) \
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(GST_IS_MINI_OBJECT_TYPE(obj, GST_TYPE_VIDEO_OVERLAY_RECTANGLE))
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typedef struct _GstVideoOverlayRectangle GstVideoOverlayRectangle;
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/**
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* gst_video_overlay_rectangle_ref:
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* @comp: a a #GstVideoOverlayRectangle.
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*
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* Increases the refcount of the given rectangle by one.
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*
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* Note that the refcount affects the writeability
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* of @comp, use gst_video_overlay_rectangle_copy() to ensure a rectangle can
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* be modified (there is no gst_video_overlay_rectangle_make_writable() because
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* it is unlikely that someone will hold the single reference to the rectangle
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* and not know that that's the case).
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*
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* Returns: (transfer full): @comp
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*/
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#ifdef _FOOL_GTK_DOC_
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G_INLINE_FUNC GstVideoOverlayRectangle *
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gst_video_overlay_rectangle_ref (GstVideoOverlayRectangle * comp);
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#endif
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static inline GstVideoOverlayRectangle *
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gst_video_overlay_rectangle_ref (GstVideoOverlayRectangle * comp)
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{
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return (GstVideoOverlayRectangle *) gst_mini_object_ref (GST_MINI_OBJECT_CAST (comp));
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}
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/**
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* gst_video_overlay_rectangle_unref:
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* @comp: (transfer full): a #GstVideoOverlayRectangle.
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*
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* Decreases the refcount of the rectangle. If the refcount reaches 0, the
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* rectangle will be freed.
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*/
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#ifdef _FOOL_GTK_DOC_
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G_INLINE_FUNC void
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gst_video_overlay_rectangle_unref (GstVideoOverlayRectangle * comp);
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#endif
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static inline void
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gst_video_overlay_rectangle_unref (GstVideoOverlayRectangle * comp)
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{
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gst_mini_object_unref (GST_MINI_OBJECT_CAST (comp));
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}
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/**
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* GstVideoOverlayFormatFlags:
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* @GST_VIDEO_OVERLAY_FORMAT_FLAG_NONE: no flags
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* @GST_VIDEO_OVERLAY_FORMAT_FLAG_PREMULTIPLIED_ALPHA: RGB are premultiplied by A/255.
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* @GST_VIDEO_OVERLAY_FORMAT_FLAG_GLOBAL_ALPHA: a global-alpha value != 1 is set.
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*
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* Overlay format flags.
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*/
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typedef enum {
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GST_VIDEO_OVERLAY_FORMAT_FLAG_NONE = 0,
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GST_VIDEO_OVERLAY_FORMAT_FLAG_PREMULTIPLIED_ALPHA = 1,
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GST_VIDEO_OVERLAY_FORMAT_FLAG_GLOBAL_ALPHA = 2
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} GstVideoOverlayFormatFlags;
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GType gst_video_overlay_rectangle_get_type (void);
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GstVideoOverlayRectangle * gst_video_overlay_rectangle_new_argb (GstBuffer * pixels,
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guint width, guint height, guint stride,
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gint render_x, gint render_y,
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guint render_width, guint render_height,
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GstVideoOverlayFormatFlags flags);
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GstVideoOverlayRectangle * gst_video_overlay_rectangle_copy (GstVideoOverlayRectangle * rectangle);
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guint gst_video_overlay_rectangle_get_seqnum (GstVideoOverlayRectangle * rectangle);
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void gst_video_overlay_rectangle_set_render_rectangle (GstVideoOverlayRectangle * rectangle,
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gint render_x,
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gint render_y,
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guint render_width,
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guint render_height);
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gboolean gst_video_overlay_rectangle_get_render_rectangle (GstVideoOverlayRectangle * rectangle,
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gint * render_x,
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gint * render_y,
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guint * render_width,
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guint * render_height);
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GstBuffer * gst_video_overlay_rectangle_get_pixels_argb (GstVideoOverlayRectangle * rectangle,
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guint * stride,
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GstVideoOverlayFormatFlags flags);
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GstBuffer * gst_video_overlay_rectangle_get_pixels_unscaled_argb (GstVideoOverlayRectangle * rectangle,
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guint * width,
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guint * height,
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guint * stride,
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GstVideoOverlayFormatFlags flags);
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GstVideoOverlayFormatFlags gst_video_overlay_rectangle_get_flags (GstVideoOverlayRectangle * rectangle);
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gfloat gst_video_overlay_rectangle_get_global_alpha (GstVideoOverlayRectangle * rectangle);
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void gst_video_overlay_rectangle_set_global_alpha (GstVideoOverlayRectangle * rectangle,
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gfloat global_alpha);
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/**
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* GstVideoOverlayComposition:
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*
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* An opaque video overlay composition object. A composition contains
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* multiple overlay rectangles.
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*/
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#define GST_TYPE_VIDEO_OVERLAY_COMPOSITION \
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(gst_video_overlay_composition_get_type ())
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#define GST_VIDEO_OVERLAY_COMPOSITION_CAST(obj) \
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((GstVideoOverlayComposition *)(obj)
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#define GST_VIDEO_OVERLAY_COMPOSITION(obj) \
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(GST_VIDEO_OVERLAY_COMPOSITION_CAST(obj))
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#define GST_IS_VIDEO_OVERLAY_COMPOSITION(obj) \
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(GST_IS_MINI_OBJECT_TYPE(obj, GST_TYPE_VIDEO_OVERLAY_COMPOSITION))
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typedef struct _GstVideoOverlayComposition GstVideoOverlayComposition;
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/**
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* gst_video_overlay_composition_ref:
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* @comp: a a #GstVideoOverlayComposition.
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*
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* Increases the refcount of the given composition by one.
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*
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* Note that the refcount affects the writeability
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* of @comp, use gst_video_overlay_composition_make_writable() to ensure
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* a composition and its rectangles can be modified.
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*
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* Returns: (transfer full): @comp
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*/
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#ifdef _FOOL_GTK_DOC_
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G_INLINE_FUNC GstVideoOverlayComposition *
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gst_video_overlay_composition_ref (GstVideoOverlayComposition * comp);
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#endif
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static inline GstVideoOverlayComposition *
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gst_video_overlay_composition_ref (GstVideoOverlayComposition * comp)
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{
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return (GstVideoOverlayComposition *) gst_mini_object_ref (GST_MINI_OBJECT_CAST (comp));
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}
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/**
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* gst_video_overlay_composition_unref:
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* @comp: (transfer full): a #GstVideoOverlayComposition.
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*
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* Decreases the refcount of the composition. If the refcount reaches 0, the
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* composition will be freed.
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*/
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#ifdef _FOOL_GTK_DOC_
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G_INLINE_FUNC void
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gst_video_overlay_composition_unref (GstVideoOverlayComposition * comp);
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#endif
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static inline void
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gst_video_overlay_composition_unref (GstVideoOverlayComposition * comp)
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{
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gst_mini_object_unref (GST_MINI_OBJECT_CAST (comp));
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}
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GType gst_video_overlay_composition_get_type (void);
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GstVideoOverlayComposition * gst_video_overlay_composition_copy (GstVideoOverlayComposition * comp);
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GstVideoOverlayComposition * gst_video_overlay_composition_make_writable (GstVideoOverlayComposition * comp);
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GstVideoOverlayComposition * gst_video_overlay_composition_new (GstVideoOverlayRectangle * rectangle);
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void gst_video_overlay_composition_add_rectangle (GstVideoOverlayComposition * comp,
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GstVideoOverlayRectangle * rectangle);
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guint gst_video_overlay_composition_n_rectangles (GstVideoOverlayComposition * comp);
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GstVideoOverlayRectangle * gst_video_overlay_composition_get_rectangle (GstVideoOverlayComposition * comp, guint n);
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guint gst_video_overlay_composition_get_seqnum (GstVideoOverlayComposition * comp);
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/* blend composition onto raw video buffer */
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gboolean gst_video_overlay_composition_blend (GstVideoOverlayComposition * comp,
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GstVideoFrame * video_buf);
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/* attach/retrieve composition from buffers */
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#define GST_VIDEO_OVERLAY_COMPOSITION_META_API_TYPE \
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(gst_video_overlay_composition_meta_api_get_type())
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#define GST_VIDEO_OVERLAY_COMPOSITION_META_INFO \
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(gst_video_overlay_composition_meta_get_info())
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typedef struct _GstVideoOverlayCompositionMeta GstVideoOverlayCompositionMeta;
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/**
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* GstVideoOverlayCompositionMeta:
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* @meta: parent #GstMeta
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* @overlay: the attached #GstVideoOverlayComposition
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*
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* Extra buffer metadata describing image overlay data.
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*/
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struct _GstVideoOverlayCompositionMeta
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{
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GstMeta meta;
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GstVideoOverlayComposition *overlay;
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};
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GType gst_video_overlay_composition_meta_api_get_type (void);
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const GstMetaInfo *gst_video_overlay_composition_meta_get_info (void);
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GstVideoOverlayCompositionMeta * gst_buffer_add_video_overlay_composition_meta (GstBuffer * buf,
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GstVideoOverlayComposition * comp);
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#define gst_buffer_get_video_overlay_composition_meta(b) \
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((GstVideoOverlayCompositionMeta*)gst_buffer_get_meta((b),GST_VIDEO_OVERLAY_COMPOSITION_META_API_TYPE))
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#define gst_buffer_remove_video_overlay_composition_meta(b,m) \
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gst_buffer_remove_meta((b),((GstMeta *) m))
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G_END_DECLS
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#endif /* __GST_VIDEO_OVERLAY_COMPOSITION_H__ */
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