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a3a7d2e0ff
When we receive a video or audio buffer, we calculate the next stream time based on the current stream time + buffer duration. If the next buffer's stream time is after that, we issue a warning. This happens because the stream time incoming from Decklink should be really constant and without gaps. If there is a gap, it means that something went wrong, e.g. the internal buffer pool is empty (too many buffers queued up downstream). https://bugzilla.gnome.org/show_bug.cgi?id=781776
95 lines
2.7 KiB
C
95 lines
2.7 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_AUDIO_SRC_H__
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#define __GST_DECKLINK_AUDIO_SRC_H__
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#include <gst/gst.h>
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#include <gst/base/base.h>
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#include <gst/audio/audio.h>
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#include "gstdecklink.h"
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G_BEGIN_DECLS
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#define GST_TYPE_DECKLINK_AUDIO_SRC \
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(gst_decklink_audio_src_get_type())
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#define GST_DECKLINK_AUDIO_SRC(obj) \
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(G_TYPE_CHECK_INSTANCE_CAST((obj), GST_TYPE_DECKLINK_AUDIO_SRC, GstDecklinkAudioSrc))
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#define GST_DECKLINK_AUDIO_SRC_CAST(obj) \
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((GstDecklinkAudioSrc*)obj)
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#define GST_DECKLINK_AUDIO_SRC_CLASS(klass) \
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(G_TYPE_CHECK_CLASS_CAST((klass), GST_TYPE_DECKLINK_AUDIO_SRC, GstDecklinkAudioSrcClass))
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#define GST_IS_DECKLINK_AUDIO_SRC(obj) \
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(G_TYPE_CHECK_INSTANCE_TYPE((obj), GST_TYPE_DECKLINK_AUDIO_SRC))
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#define GST_IS_DECKLINK_AUDIO_SRC_CLASS(klass) \
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(G_TYPE_CHECK_CLASS_TYPE((klass), GST_TYPE_DECKLINK_AUDIO_SRC))
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typedef struct _GstDecklinkAudioSrc GstDecklinkAudioSrc;
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typedef struct _GstDecklinkAudioSrcClass GstDecklinkAudioSrcClass;
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struct _GstDecklinkAudioSrc
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{
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GstPushSrc parent;
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GstDecklinkModeEnum mode;
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GstDecklinkAudioConnectionEnum connection;
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gint device_number;
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GstDecklinkAudioChannelsEnum channels;
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gint64 channels_found;
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GstAudioInfo info;
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GstDecklinkInput *input;
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GCond cond;
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GMutex lock;
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gboolean flushing;
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GstQueueArray *current_packets;
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/* properties for handling jittery timestamps */
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GstClockTime alignment_threshold;
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GstClockTime discont_wait;
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/* counter to keep track of timestamps */
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guint64 next_offset;
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/* detect gaps in stream time */
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GstClockTime expected_stream_time;
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guint64 processed;
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guint64 dropped;
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/* Last time we noticed a discont */
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GstClockTime discont_time;
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guint buffer_size;
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};
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struct _GstDecklinkAudioSrcClass
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{
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GstPushSrcClass parent_class;
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};
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GType gst_decklink_audio_src_get_type (void);
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G_END_DECLS
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#endif /* __GST_DECKLINK_AUDIO_SRC_H__ */
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