gstreamer/subprojects/gst-plugins-base/gst/videorate/gstvideorate.h

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/* GStreamer
* Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
*
* 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., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#ifndef __GST_VIDEO_RATE_H__
#define __GST_VIDEO_RATE_H__
#include <gst/gst.h>
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#include <gst/base/gstbasetransform.h>
G_BEGIN_DECLS
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#define GST_TYPE_VIDEO_RATE (gst_video_rate_get_type())
G_DECLARE_FINAL_TYPE (GstVideoRate, gst_video_rate, GST, VIDEO_RATE,
GstBaseTransform)
/**
* GstVideoRate:
*
* Opaque data structure.
*/
struct _GstVideoRate
{
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GstBaseTransform parent;
/* video state */
gint from_rate_numerator, from_rate_denominator;
gint to_rate_numerator, to_rate_denominator;
guint64 next_ts; /* Timestamp of next buffer to output */
GstBuffer *prevbuf;
guint64 prev_ts; /* Previous buffer timestamp */
guint64 out_frame_count; /* number of frames output since the beginning
* of the segment or the last frame rate caps
* change, whichever was later */
guint64 base_ts; /* used in next_ts calculation after a
* frame rate caps change */
gboolean discont;
guint64 last_ts; /* Timestamp of last input buffer */
guint64 average_period;
GstClockTimeDiff wanted_diff; /* target average diff */
GstClockTimeDiff average; /* moving average period */
gboolean force_variable_rate;
gboolean updating_caps;
guint64 max_duplication_time;
guint64 max_closing_segment_duplication_duration;
/* segment handling */
GstSegment segment;
/* properties */
guint64 in, out, dup, drop;
gboolean silent;
gdouble new_pref;
gboolean skip_to_first;
gboolean drop_only;
guint64 average_period_set;
int max_rate;
gdouble rate;
gdouble pending_rate;
GstCaps *in_caps;
/* Only set right after caps were set so that we still have a reference to
* the caps matching the content of `->prevbuf`, this way, if we get an EOS
* right after a CAPS, we can reset to those caps and close the segment with
* it */
GstCaps *prev_caps;
};
GST_ELEMENT_REGISTER_DECLARE (videorate);
G_END_DECLS
#endif /* __GST_VIDEO_RATE_H__ */