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78 lines
2.6 KiB
C
78 lines
2.6 KiB
C
/* Gstreamer video blending utility functions
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*
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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> Thibault Saunier <thibault.saunier@collabora.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., 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_BLEND__
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#define __GST_VIDEO_BLEND__
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#include <gst/gst.h>
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#include <gst/video/video.h>
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#define MAX_VIDEO_PLANES 4
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typedef struct _GstBlendVideoFormatInfo GstBlendVideoFormatInfo;
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/**
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* GstBlendVideoFormatInfo:
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* @fmt: The #GstVideoFormat describing the video format
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* @width: The width of the video
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* @height: The height of the video
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* @pixels: The buffer containing the pixels of the video
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* @size: The size in byte of @pixels
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* @offset: The offsets of the different component of the video
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* @stride: The stride of the different component of the video
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*
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* Information describing image properties containing necessary
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* fields to do video blending.
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*/
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struct _GstBlendVideoFormatInfo
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{
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GstVideoFormat fmt;
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gint width;
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gint height;
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gint dest_width;
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gint dest_height;
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guint8 * pixels;
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gsize size;
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/* YUV components: Y=0, U=1, V=2, A=3
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* RGB components: R=0, G=1, B=2, A=3 */
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gint offset[MAX_VIDEO_PLANES];
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gint stride[MAX_VIDEO_PLANES];
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};
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void video_blend_format_info_init (GstBlendVideoFormatInfo * info,
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guint8 *pixels, guint height,
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guint width, GstVideoFormat fmt);
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void video_blend_scale_linear_RGBA (GstBlendVideoFormatInfo * src,
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gint dest_height, gint dest_width);
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gboolean video_blend (GstBlendVideoFormatInfo * dest,
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GstBlendVideoFormatInfo * src,
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guint x, guint y);
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#endif
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