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d7bb5b8a16
Directly read them out of the decoder as soon as we passed audio and then store them in a queue that we handle internally together with their timestamps. This cleans up memory management and gives us proper control over the queue instead of guessing how the queue inside the LTC decoder actually works and when it overflows.
163 lines
5 KiB
C
163 lines
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_LAST_KNOWN_OR_ZERO,
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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 tc_auto_resync;
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GstClockTime tc_timeout;
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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 ltc_timeout;
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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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GstClockTime last_tc_running_time;
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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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/* Queue of LTC timecodes we took out of the LTC decoder already
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* together with their corresponding running times */
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GQueue ltc_current_tcs;
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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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GstClockTime ltc_internal_running_time;
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/* Running time of last video frame we received */
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GstClockTime video_current_running_time;
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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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/* Latency information for LTC audio and video stream */
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GstClockTime audio_latency, video_latency;
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gboolean audio_live, video_live;
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/* Latency we report to downstream */
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GstClockTime latency;
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GstClockID video_clock_id;
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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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