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6ea4557271
Based on a patch by Georg Lippitsch <glippitsch@toolsonair.com> Vivia Nikolaidou <vivia@toolsonair.com> Using libltc from https://github.com/x42/libltc
148 lines
4.5 KiB
C
148 lines
4.5 KiB
C
/*
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* GStreamer
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* Copyright (C) 2016 Vivia Nikolaidou <vivia@toolsonair.com>
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*
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* gsttimecodestamper.h
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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_TIME_CODE_STAMPER_H__
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#define __GST_TIME_CODE_STAMPER_H__
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#include <gst/gst.h>
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#include <gst/video/video.h>
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#include <gst/audio/audio.h>
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#if HAVE_LTC
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#include <ltc.h>
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#endif
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#define GST_TYPE_TIME_CODE_STAMPER (gst_timecodestamper_get_type())
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#define GST_TIME_CODE_STAMPER(obj) (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_TIME_CODE_STAMPER,GstTimeCodeStamper))
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#define GST_TIME_CODE_STAMPER_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST((klass), GST_TYPE_TIME_CODE_STAMPER,GstTimeCodeStamperClass))
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#define GST_TIME_CODE_STAMPER_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS((obj), GST_TYPE_TIME_CODE_STAMPER,GstTimeCodeStamperClass))
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#define GST_IS_TIME_CODE_STAMPER(obj) (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_TIME_CODE_STAMPER))
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#define GST_IS_TIME_CODE_STAMPER_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE((klass), GST_TYPE_TIME_CODE_STAMPER))
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#define GST_TYPE_TIME_CODE_STAMPER_SOURCE (gst_timecodestamper_source_get_type())
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#define GST_TYPE_TIME_CODE_STAMPER_SET (gst_timecodestamper_set_get_type())
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typedef struct _GstTimeCodeStamper GstTimeCodeStamper;
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typedef struct _GstTimeCodeStamperClass GstTimeCodeStamperClass;
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typedef enum GstTimeCodeStamperSource
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{
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GST_TIME_CODE_STAMPER_SOURCE_INTERNAL,
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GST_TIME_CODE_STAMPER_SOURCE_ZERO,
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GST_TIME_CODE_STAMPER_SOURCE_LAST_KNOWN,
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GST_TIME_CODE_STAMPER_SOURCE_LTC,
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GST_TIME_CODE_STAMPER_SOURCE_RTC,
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} GstTimeCodeStamperSource;
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typedef enum GstTimeCodeStamperSet {
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GST_TIME_CODE_STAMPER_SET_NEVER,
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GST_TIME_CODE_STAMPER_SET_KEEP,
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GST_TIME_CODE_STAMPER_SET_ALWAYS,
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} GstTimeCodeStamperSet;
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/**
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* GstTimeCodeStamper:
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*
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* Opaque data structure.
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*/
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struct _GstTimeCodeStamper
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{
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GstBaseTransform videofilter;
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/* protected by object lock */
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GstPad *ltcpad;
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/* < private > */
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/* Properties, protected by object lock */
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GstTimeCodeStamperSource tc_source;
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GstTimeCodeStamperSet tc_set;
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gboolean drop_frame;
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gboolean post_messages;
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GstVideoTimeCode *set_internal_tc;
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GDateTime *ltc_daily_jam;
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gboolean ltc_auto_resync;
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GstClockTime rtc_max_drift;
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gboolean rtc_auto_resync;
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gint timecode_offset;
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/* Timecode tracking, protected by object lock */
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GstVideoTimeCode *internal_tc;
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GstVideoTimeCode *last_tc;
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GstVideoTimeCode *rtc_tc;
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/* Internal state */
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GstVideoInfo vinfo; /* protected by object lock, changed only from video streaming thread */
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/* LTC specific fields */
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#if HAVE_LTC
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GMutex mutex;
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GCond ltc_cond_video;
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GCond ltc_cond_audio;
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/* Only accessed from audio streaming thread */
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GstAudioInfo ainfo;
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GstAudioStreamAlign *stream_align;
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GstSegment ltc_segment;
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/* Running time of the first audio buffer passed to the LTC decoder */
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GstClockTime ltc_first_running_time;
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/* Running time of the last sample we passed to the LTC decoder so far */
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GstClockTime ltc_current_running_time;
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/* Protected by object lock */
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/* Current LTC timecode that we last read close
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* to our video running time */
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GstVideoTimeCode *ltc_current_tc;
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GstClockTime ltc_current_tc_running_time;
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/* LTC timecode we last synced to and potentially incremented manually since
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* then */
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GstVideoTimeCode *ltc_internal_tc;
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/* Protected by mutex above */
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LTCDecoder *ltc_dec;
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ltc_off_t ltc_total;
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/* Protected by mutex above */
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gboolean video_flushing;
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gboolean video_eos;
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/* Protected by mutex above */
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gboolean ltc_flushing;
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gboolean ltc_eos;
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GstPadActivateModeFunction video_activatemode_default;
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#endif
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};
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struct _GstTimeCodeStamperClass
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{
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GstBaseTransformClass parent_class;
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};
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GType gst_timecodestamper_get_type (void);
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GType gst_timecodestamper_source_get_type (void);
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GType gst_timecodestamper_set_get_type (void);
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G_END_DECLS
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#endif /* __GST_TIME_CODE_STAMPER_H__ */
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