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https://gitlab.freedesktop.org/gstreamer/gstreamer.git
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59c5ae2817
Fixes the time calculations when dealing with a slaved clock (as
will occur with more than one decklink video sink), when performing
flushing seeks causing stalls in the output timeline, pausing.
Tighten up the calculations by relying solely on the internal time
(from the internal clock) for determining when to schedule display
frames instead attempting to track pause lengths from the external
clock and converting to internal time. This results in a much easier
offset calculation for choosing the output time and ensures that the
clock is always advancing when we need it to.
This is fixup to the 'monotonically increasing output timestamps' goal
in: bf849e9a69
86 lines
2.6 KiB
C
86 lines
2.6 KiB
C
/* GStreamer
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*
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* Copyright (C) 2011 David Schleef <ds@schleef.org>
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* Copyright (C) 2014 Sebastian Dröge <sebastian@centricular.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., 51 Franklin St, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*/
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#ifndef __GST_DECKLINK_VIDEO_SINK_H__
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#define __GST_DECKLINK_VIDEO_SINK_H__
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#include <gst/gst.h>
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#include <gst/base/base.h>
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#include <gst/video/video.h>
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#include "gstdecklink.h"
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G_BEGIN_DECLS
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#define GST_TYPE_DECKLINK_VIDEO_SINK \
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(gst_decklink_video_sink_get_type())
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#define GST_DECKLINK_VIDEO_SINK(obj) \
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(G_TYPE_CHECK_INSTANCE_CAST((obj), GST_TYPE_DECKLINK_VIDEO_SINK, GstDecklinkVideoSink))
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#define GST_DECKLINK_VIDEO_SINK_CAST(obj) \
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((GstDecklinkVideoSink*)obj)
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#define GST_DECKLINK_VIDEO_SINK_CLASS(klass) \
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(G_TYPE_CHECK_CLASS_CAST((klass), GST_TYPE_DECKLINK_VIDEO_SINK, GstDecklinkVideoSinkClass))
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#define GST_IS_DECKLINK_VIDEO_SINK(obj) \
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(G_TYPE_CHECK_INSTANCE_TYPE((obj), GST_TYPE_DECKLINK_VIDEO_SINK))
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#define GST_IS_DECKLINK_VIDEO_SINK_CLASS(klass) \
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(G_TYPE_CHECK_CLASS_TYPE((klass), GST_TYPE_DECKLINK_VIDEO_SINK))
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typedef struct _GstDecklinkVideoSink GstDecklinkVideoSink;
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typedef struct _GstDecklinkVideoSinkClass GstDecklinkVideoSinkClass;
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struct _GstDecklinkVideoSink
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{
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GstBaseSink parent;
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GstDecklinkModeEnum mode;
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gint device_number;
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GstDecklinkVideoFormat video_format;
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BMDTimecodeFormat timecode_format;
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BMDKeyerMode keyer_mode;
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gint keyer_level;
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GstVideoInfo info;
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GstClockTime internal_base_time;
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GstClockTime external_base_time;
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/* really an internal start time */
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GstClockTime internal_time_offset;
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GstDecklinkOutput *output;
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GstVideoVBIEncoder *vbiencoder;
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GstVideoFormat anc_vformat;
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gint caption_line;
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};
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struct _GstDecklinkVideoSinkClass
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{
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GstBaseSinkClass parent_class;
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};
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GType gst_decklink_video_sink_get_type (void);
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void gst_decklink_video_sink_convert_to_internal_clock (GstDecklinkVideoSink * self,
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GstClockTime * timestamp, GstClockTime * duration);
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G_END_DECLS
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#endif /* __GST_DECKLINK_VIDEO_SINK_H__ */
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