6f623af4d7
The 'new-pref' property sets the preference to use the new (next) instead of the old (previous) buffer. The default is set to 0.5 to get a similar behaviour as before the change. Value 0.0 makes sure that only frames are shown where it's known that the frame content is visible at that time, always show the old frame until the new frame timestamp is reached. Then, if the next buffer replaces the previous buffer the new buffer is pushed as often as possible until PTS is reached. Before the new buffer was only pushed once the new next buffer arrived. Use GstClockTimeDiff because it's known that the current buffer time is inside the time interval of previous buffer and next buffer the calculation can be done with building absolute values. Special macros are not needed here. Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/8579>
94 lines
3.0 KiB
C
94 lines
3.0 KiB
C
/* GStreamer
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* Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
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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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#ifndef __GST_VIDEO_RATE_H__
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#define __GST_VIDEO_RATE_H__
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#include <gst/gst.h>
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#include <gst/base/gstbasetransform.h>
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G_BEGIN_DECLS
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#define GST_TYPE_VIDEO_RATE (gst_video_rate_get_type())
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G_DECLARE_FINAL_TYPE (GstVideoRate, gst_video_rate, GST, VIDEO_RATE,
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GstBaseTransform)
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/**
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* GstVideoRate:
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*
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* Opaque data structure.
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*/
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struct _GstVideoRate
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{
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GstBaseTransform parent;
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/* video state */
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gint from_rate_numerator, from_rate_denominator;
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gint to_rate_numerator, to_rate_denominator;
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guint64 next_ts; /* Timestamp of next buffer to output */
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guint64 next_end_ts; /* Timestamp of end of next buffer to output */
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GstBuffer *prevbuf;
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gboolean prevbuf_pushed;
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guint64 prev_ts; /* Previous buffer timestamp */
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guint64 prev_end_ts; /* Previous buffer end timestamp */
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guint64 out_frame_count; /* number of frames output since the beginning
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* of the segment or the last frame rate caps
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* change, whichever was later */
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guint64 base_ts; /* used in next_ts calculation after a
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* frame rate caps change */
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gboolean discont;
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guint64 last_ts; /* Timestamp of last input buffer */
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guint64 average_period;
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GstClockTimeDiff wanted_diff; /* target average diff */
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GstClockTimeDiff average; /* moving average period */
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gboolean force_variable_rate;
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gboolean updating_caps;
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guint64 max_duplication_time;
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guint64 max_closing_segment_duplication_duration;
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/* segment handling */
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GstSegment segment;
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/* properties */
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guint64 in, out, dup, drop;
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gboolean silent;
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gdouble new_pref;
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gboolean skip_to_first;
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gboolean drop_only;
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gboolean drop_out_of_segment;
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guint64 average_period_set;
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int max_rate;
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gdouble rate;
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gdouble pending_rate;
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GstCaps *in_caps;
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/* Only set right after caps were set so that we still have a reference to
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* the caps matching the content of `->prevbuf`, this way, if we get an EOS
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* right after a CAPS, we can reset to those caps and close the segment with
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* it */
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GstCaps *prev_caps;
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};
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GST_ELEMENT_REGISTER_DECLARE (videorate);
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G_END_DECLS
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#endif /* __GST_VIDEO_RATE_H__ */
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