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ec062ef3f2
API: GstVideoRate:force-fps Changing the framerate during playback is not possible with a capsfilter downstream if upstream is not using gst_pad_alloc_buffer(). In that case there's no way in 0.10 to signal to videorate that the preferred framerate has changed. This new property will force the output framerate to a specific value and can be changed during playback.
92 lines
2.8 KiB
C
92 lines
2.8 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., 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_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 \
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(gst_video_rate_get_type())
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#define GST_VIDEO_RATE(obj) \
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(G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_VIDEO_RATE,GstVideoRate))
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#define GST_VIDEO_RATE_CLASS(klass) \
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(G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_VIDEO_RATE,GstVideoRateClass))
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#define GST_IS_VIDEO_RATE(obj) \
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(G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_VIDEO_RATE))
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#define GST_IS_VIDEO_RATE_CLASS(klass) \
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(G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_VIDEO_RATE))
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typedef struct _GstVideoRate GstVideoRate;
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typedef struct _GstVideoRateClass GstVideoRateClass;
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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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GstBuffer *prevbuf;
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guint64 prev_ts; /* Previous buffer 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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/* 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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guint64 average_period_set;
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volatile int max_rate;
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};
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struct _GstVideoRateClass
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{
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GstBaseTransformClass parent_class;
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};
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GType gst_video_rate_get_type (void);
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G_END_DECLS
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#endif /* __GST_VIDEO_RATE_H__ */
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