gstreamer/gst-libs/gst/video/video.h

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/* GStreamer
* Copyright (C) <2011> Wim Taymans <wim.taymans@gmail.com>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#ifndef __GST_VIDEO_H__
#define __GST_VIDEO_H__
#include <gst/gst.h>
typedef struct _GstVideoAlignment GstVideoAlignment;
#include <gst/video/video-event.h>
#include <gst/video/video-format.h>
#include <gst/video/video-color.h>
#include <gst/video/video-info.h>
#include <gst/video/video-frame.h>
#include <gst/video/video-enumtypes.h>
G_BEGIN_DECLS
/**
* GstVideoAlignment:
* @padding_left: extra pixels on the left side
* @padding_right: extra pixels on the right side
* @padding_top: extra pixels on the top
* @padding_bottom: extra pixels on the bottom
* @stride_align: array with extra alignment requirements for the strides
*
* Extra alignment paramters for the memory of video buffers. This
* structure is usually used to configure the bufferpool if it supports the
* #GST_BUFFER_POOL_OPTION_VIDEO_ALIGNMENT.
*/
struct _GstVideoAlignment
{
guint padding_top;
guint padding_bottom;
guint padding_left;
guint padding_right;
guint stride_align[GST_VIDEO_MAX_PLANES];
};
void gst_video_alignment_reset (GstVideoAlignment *align);
/* some helper functions */
gboolean gst_video_calculate_display_ratio (guint * dar_n,
guint * dar_d,
guint video_width,
guint video_height,
guint video_par_n,
guint video_par_d,
guint display_par_n,
guint display_par_d);
/* convert/encode video sample from one format to another */
typedef void (*GstVideoConvertSampleCallback) (GstSample * sample, GError *error, gpointer user_data);
void gst_video_convert_sample_async (GstSample * sample,
const GstCaps * to_caps,
GstClockTime timeout,
GstVideoConvertSampleCallback callback,
gpointer user_data,
GDestroyNotify destroy_notify);
GstSample * gst_video_convert_sample (GstSample * sample,
const GstCaps * to_caps,
GstClockTime timeout,
GError ** error);
G_END_DECLS
#endif /* __GST_VIDEO_H__ */