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gstreamer/gst/timecode/gsttimecodestamper.c
Sebastian Dröge 6ea4557271 timecodestamper: Add support for linear timecode (LTC) from an audio stream 
Based on a patch by
  Georg Lippitsch <glippitsch@toolsonair.com>
  Vivia Nikolaidou <vivia@toolsonair.com>

Using libltc from https://github.com/x42/libltc
2019-07-08 16:45:12 +00:00

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/*
* GStreamer
* Copyright (C) 2016 Vivia Nikolaidou <vivia@toolsonair.com>
* Copyright (C) 2019 Sebastian Dröge <sebastian@centricular.com>
*
* gsttimecodestamper.c
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
/**
* SECTION:element-timecodestamper
* @title: timecodestamper
* @short_description: Attach a timecode into incoming video frames
*
* This element attaches a timecode into every incoming video frame. It starts
* counting from the stream time of each segment start, which it converts into
* a timecode.
*
* ## Example launch line
* |[
* gst-launch-1.0 videotestsrc ! timecodestamper ! autovideosink
* ]|
*
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "gsttimecodestamper.h"
#include <gst/gst.h>
#include <gst/video/video.h>
#include <gst/audio/audio.h>
#include <stdlib.h>
#include <string.h>
#define ABSDIFF(a,b) (((a) > (b)) ? ((a) - (b)) : ((b) - (a)))
GST_DEBUG_CATEGORY_STATIC (timecodestamper_debug);
#define GST_CAT_DEFAULT timecodestamper_debug
/* GstTimeCodeStamper properties */
enum
{
PROP_0,
PROP_SOURCE,
PROP_SET,
PROP_DROP_FRAME,
PROP_POST_MESSAGES,
PROP_SET_INTERNAL_TIMECODE,
PROP_LTC_DAILY_JAM,
PROP_LTC_AUTO_RESYNC,
PROP_RTC_MAX_DRIFT,
PROP_RTC_AUTO_RESYNC,
PROP_TIMECODE_OFFSET
};
#define DEFAULT_SOURCE GST_TIME_CODE_STAMPER_SOURCE_INTERNAL
#define DEFAULT_SET GST_TIME_CODE_STAMPER_SET_KEEP
#define DEFAULT_DROP_FRAME FALSE
#define DEFAULT_POST_MESSAGES FALSE
#define DEFAULT_SET_INTERNAL_TIMECODE NULL
#define DEFAULT_LTC_DAILY_JAM NULL
#define DEFAULT_LTC_AUTO_RESYNC TRUE
#define DEFAULT_RTC_MAX_DRIFT 250000000
#define DEFAULT_RTC_AUTO_RESYNC TRUE
#define DEFAULT_TIMECODE_OFFSET 0
#define DEFAULT_LTC_QUEUE 100
static GstStaticPadTemplate gst_timecodestamper_src_template =
GST_STATIC_PAD_TEMPLATE ("src",
GST_PAD_SRC,
GST_PAD_ALWAYS,
GST_STATIC_CAPS ("video/x-raw")
);
static GstStaticPadTemplate gst_timecodestamper_sink_template =
GST_STATIC_PAD_TEMPLATE ("sink",
GST_PAD_SINK,
GST_PAD_ALWAYS,
GST_STATIC_CAPS ("video/x-raw")
);
static GstStaticPadTemplate gst_timecodestamper_ltc_template =
GST_STATIC_PAD_TEMPLATE ("ltc_sink",
GST_PAD_SINK,
GST_PAD_REQUEST,
GST_STATIC_CAPS ("audio/x-raw,format=U8,rate=[1,max],channels=1")
);
static void gst_timecodestamper_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec);
static void gst_timecodestamper_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec);
static void gst_timecodestamper_dispose (GObject * object);
static gboolean gst_timecodestamper_sink_event (GstBaseTransform * trans,
GstEvent * event);
static GstFlowReturn gst_timecodestamper_transform_ip (GstBaseTransform *
vfilter, GstBuffer * buffer);
static gboolean gst_timecodestamper_stop (GstBaseTransform * trans);
static gboolean gst_timecodestamper_start (GstBaseTransform * trans);
static GstPad *gst_timecodestamper_request_new_pad (GstElement * element,
GstPadTemplate * temp, const gchar * unused, const GstCaps * caps);
static void gst_timecodestamper_release_pad (GstElement * element,
GstPad * pad);
#if HAVE_LTC
static GstFlowReturn gst_timecodestamper_ltcpad_chain (GstPad * pad,
GstObject * parent, GstBuffer * buffer);
static gboolean gst_timecodestamper_ltcpad_event (GstPad * pad,
GstObject * parent, GstEvent * event);
static gboolean gst_timecodestamper_ltcpad_query (GstPad * pad,
GstObject * parent, GstQuery * query);
static gboolean gst_timecodestamper_ltcpad_activatemode (GstPad * pad,
GstObject * parent, GstPadMode mode, gboolean active);
static gboolean gst_timecodestamper_videopad_activatemode (GstPad * pad,
GstObject * parent, GstPadMode mode, gboolean active);
static GstIterator *gst_timecodestamper_src_iterate_internal_link (GstPad * pad,
GstObject * parent);
#endif
static void gst_timecodestamper_update_drop_frame (GstTimeCodeStamper *
timecodestamper);
G_DEFINE_TYPE (GstTimeCodeStamper, gst_timecodestamper,
GST_TYPE_BASE_TRANSFORM);
GType
gst_timecodestamper_source_get_type (void)
{
static GType type = 0;
static const GEnumValue values[] = {
{GST_TIME_CODE_STAMPER_SOURCE_INTERNAL,
"Use internal timecode counter, starting at zero or value set by property",
"internal"},
{GST_TIME_CODE_STAMPER_SOURCE_ZERO,
"Always use zero", "zero"},
{GST_TIME_CODE_STAMPER_SOURCE_LAST_KNOWN,
"Count up from the last known upstream timecode or internal if unknown",
"last-known"},
{GST_TIME_CODE_STAMPER_SOURCE_LTC,
"Linear timecode from an audio device", "ltc"},
{GST_TIME_CODE_STAMPER_SOURCE_RTC,
"Timecode from real time clock", "rtc"},
{0, NULL, NULL},
};
if (!type) {
type = g_enum_register_static ("GstTimeCodeStamperSource", values);
}
return type;
}
GType
gst_timecodestamper_set_get_type (void)
{
static GType type = 0;
static const GEnumValue values[] = {
{GST_TIME_CODE_STAMPER_SET_NEVER,
"Never set timecodes", "never"},
{GST_TIME_CODE_STAMPER_SET_KEEP,
"Keep upstream timecodes and only set if no upstream timecode", "keep"},
{GST_TIME_CODE_STAMPER_SET_ALWAYS,
"Always set timecode and remove upstream timecode", "always"},
{0, NULL, NULL},
};
if (!type) {
type = g_enum_register_static ("GstTimeCodeStamperSet", values);
}
return type;
}
static void
gst_timecodestamper_class_init (GstTimeCodeStamperClass * klass)
{
GObjectClass *gobject_class = (GObjectClass *) klass;
GstElementClass *element_class = (GstElementClass *) klass;
GstBaseTransformClass *trans_class = (GstBaseTransformClass *) klass;
GST_DEBUG_CATEGORY_INIT (timecodestamper_debug, "timecodestamper", 0,
"timecodestamper");
gst_element_class_set_static_metadata (element_class, "Timecode stamper",
"Filter/Video", "Attaches a timecode meta into each video frame",
"Vivia Nikolaidou <vivia@toolsonair.com>");
gobject_class->set_property = gst_timecodestamper_set_property;
gobject_class->get_property = gst_timecodestamper_get_property;
gobject_class->dispose = gst_timecodestamper_dispose;
g_object_class_install_property (gobject_class, PROP_SOURCE,
g_param_spec_enum ("source", "Timecode Source",
"Choose from what source the timecode should be taken",
GST_TYPE_TIME_CODE_STAMPER_SOURCE,
DEFAULT_SOURCE, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_SET,
g_param_spec_enum ("set", "Timecode Set",
"Choose whether timecodes should be overridden or not",
GST_TYPE_TIME_CODE_STAMPER_SET,
DEFAULT_SET, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_DROP_FRAME,
g_param_spec_boolean ("drop-frame", "Drop Frame",
"Use drop-frame timecodes for 29.97 and 59.94 FPS",
DEFAULT_DROP_FRAME, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_POST_MESSAGES,
g_param_spec_boolean ("post-messages", "Post element message",
"Post element message containing the current timecode",
DEFAULT_POST_MESSAGES, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_SET_INTERNAL_TIMECODE,
g_param_spec_boxed ("set-internal-timecode",
"Set Internal Timecode",
"If set, take this timecode as the internal timecode for the first "
"frame and increment from it. Only the values itself and daily jam are taken, "
"flags and frame rate are always determined by timecodestamper "
"itself. If unset (and to-now is also not set), the internal timecode will "
"start at 0 with the daily jam being the current real-time clock time",
GST_TYPE_VIDEO_TIME_CODE,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_LTC_DAILY_JAM,
g_param_spec_boxed ("ltc-daily-jam",
"LTC Daily jam",
"The daily jam of the LTC timecode",
G_TYPE_DATE_TIME, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_LTC_AUTO_RESYNC,
g_param_spec_boolean ("ltc-auto-resync",
"LTC Auto Resync",
"If true and LTC timecode is used, it will be automatically "
"resynced if it drifts, otherwise it will only be initialised once",
DEFAULT_LTC_AUTO_RESYNC, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_RTC_MAX_DRIFT,
g_param_spec_uint64 ("rtc-max-drift",
"RTC Maximum Offset",
"Maximum number of nanoseconds the RTC clock is allowed to drift from "
"the video before it is resynced",
0, G_MAXUINT64, DEFAULT_RTC_MAX_DRIFT,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_RTC_AUTO_RESYNC,
g_param_spec_boolean ("rtc-auto-resync",
"RTC Auto Resync",
"If true and RTC timecode is used, it will be automatically "
"resynced if it drifts, otherwise it will only be initialised once",
DEFAULT_RTC_AUTO_RESYNC, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_TIMECODE_OFFSET,
g_param_spec_int ("timecode-offset",
"Timecode Offset",
"Add this offset in frames to internal, LTC or RTC timecode, "
"useful if there is an offset between the timecode source and video",
G_MININT, G_MAXINT, 0, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&gst_timecodestamper_sink_template));
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&gst_timecodestamper_src_template));
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&gst_timecodestamper_ltc_template));
element_class->request_new_pad =
GST_DEBUG_FUNCPTR (gst_timecodestamper_request_new_pad);
element_class->release_pad =
GST_DEBUG_FUNCPTR (gst_timecodestamper_release_pad);
trans_class->sink_event = GST_DEBUG_FUNCPTR (gst_timecodestamper_sink_event);
trans_class->stop = GST_DEBUG_FUNCPTR (gst_timecodestamper_stop);
trans_class->start = GST_DEBUG_FUNCPTR (gst_timecodestamper_start);
trans_class->transform_ip =
GST_DEBUG_FUNCPTR (gst_timecodestamper_transform_ip);
}
static void
gst_timecodestamper_init (GstTimeCodeStamper * timecodestamper)
{
timecodestamper->ltcpad = NULL;
timecodestamper->tc_source = GST_TIME_CODE_STAMPER_SOURCE_INTERNAL;
timecodestamper->tc_set = GST_TIME_CODE_STAMPER_SET_KEEP;
timecodestamper->drop_frame = DEFAULT_DROP_FRAME;
timecodestamper->post_messages = DEFAULT_POST_MESSAGES;
timecodestamper->set_internal_tc = NULL;
timecodestamper->ltc_daily_jam = DEFAULT_LTC_DAILY_JAM;
timecodestamper->ltc_auto_resync = DEFAULT_LTC_AUTO_RESYNC;
timecodestamper->rtc_max_drift = DEFAULT_RTC_MAX_DRIFT;
timecodestamper->rtc_auto_resync = DEFAULT_RTC_AUTO_RESYNC;
timecodestamper->timecode_offset = 0;
timecodestamper->internal_tc = NULL;
timecodestamper->last_tc = NULL;
timecodestamper->rtc_tc = NULL;
#if HAVE_LTC
g_mutex_init (&timecodestamper->mutex);
g_cond_init (&timecodestamper->ltc_cond_video);
g_cond_init (&timecodestamper->ltc_cond_audio);
gst_segment_init (&timecodestamper->ltc_segment, GST_FORMAT_UNDEFINED);
timecodestamper->ltc_first_running_time = GST_CLOCK_TIME_NONE;
timecodestamper->ltc_current_running_time = GST_CLOCK_TIME_NONE;
timecodestamper->ltc_current_tc = NULL;
timecodestamper->ltc_current_tc_running_time = GST_CLOCK_TIME_NONE;
timecodestamper->ltc_internal_tc = NULL;
timecodestamper->ltc_dec = NULL;
timecodestamper->ltc_total = 0;
timecodestamper->ltc_eos = TRUE;
timecodestamper->ltc_flushing = TRUE;
timecodestamper->video_activatemode_default =
GST_PAD_ACTIVATEMODEFUNC (GST_BASE_TRANSFORM_SINK_PAD (timecodestamper));
GST_PAD_ACTIVATEMODEFUNC (GST_BASE_TRANSFORM_SINK_PAD (timecodestamper)) =
gst_timecodestamper_videopad_activatemode;
gst_pad_set_iterate_internal_links_function (GST_BASE_TRANSFORM_SRC_PAD
(timecodestamper), gst_timecodestamper_src_iterate_internal_link);
#endif
}
static void
gst_timecodestamper_dispose (GObject * object)
{
GstTimeCodeStamper *timecodestamper = GST_TIME_CODE_STAMPER (object);
if (timecodestamper->ltc_daily_jam) {
g_date_time_unref (timecodestamper->ltc_daily_jam);
timecodestamper->ltc_daily_jam = NULL;
}
if (timecodestamper->internal_tc != NULL) {
gst_video_time_code_free (timecodestamper->internal_tc);
timecodestamper->internal_tc = NULL;
}
if (timecodestamper->set_internal_tc != NULL) {
gst_video_time_code_free (timecodestamper->set_internal_tc);
timecodestamper->set_internal_tc = NULL;
}
if (timecodestamper->last_tc != NULL) {
gst_video_time_code_free (timecodestamper->last_tc);
timecodestamper->last_tc = NULL;
}
if (timecodestamper->rtc_tc != NULL) {
gst_video_time_code_free (timecodestamper->rtc_tc);
timecodestamper->rtc_tc = NULL;
}
#if HAVE_LTC
g_cond_clear (&timecodestamper->ltc_cond_video);
g_cond_clear (&timecodestamper->ltc_cond_audio);
g_mutex_clear (&timecodestamper->mutex);
if (timecodestamper->ltc_current_tc != NULL) {
gst_video_time_code_free (timecodestamper->ltc_current_tc);
timecodestamper->ltc_current_tc = NULL;
}
if (timecodestamper->ltc_internal_tc != NULL) {
gst_video_time_code_free (timecodestamper->ltc_internal_tc);
timecodestamper->ltc_internal_tc = NULL;
}
if (timecodestamper->ltc_dec) {
ltc_decoder_free (timecodestamper->ltc_dec);
timecodestamper->ltc_dec = NULL;
}
if (timecodestamper->stream_align) {
gst_audio_stream_align_free (timecodestamper->stream_align);
timecodestamper->stream_align = NULL;
}
#endif
G_OBJECT_CLASS (gst_timecodestamper_parent_class)->dispose (object);
}
static void
gst_timecodestamper_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec)
{
GstTimeCodeStamper *timecodestamper = GST_TIME_CODE_STAMPER (object);
GST_OBJECT_LOCK (timecodestamper);
switch (prop_id) {
case PROP_SOURCE:
timecodestamper->tc_source = (GstTimeCodeStamperSource)
g_value_get_enum (value);
break;
case PROP_SET:
timecodestamper->tc_set = (GstTimeCodeStamperSet)
g_value_get_enum (value);
break;
case PROP_DROP_FRAME:
timecodestamper->drop_frame = g_value_get_boolean (value);
gst_timecodestamper_update_drop_frame (timecodestamper);
break;
case PROP_LTC_DAILY_JAM:
if (timecodestamper->ltc_daily_jam)
g_date_time_unref (timecodestamper->ltc_daily_jam);
timecodestamper->ltc_daily_jam = g_value_dup_boxed (value);
#if HAVE_LTC
if (timecodestamper->ltc_current_tc) {
if (timecodestamper->ltc_current_tc->config.latest_daily_jam) {
g_date_time_unref (timecodestamper->ltc_current_tc->config.
latest_daily_jam);
}
timecodestamper->ltc_current_tc->config.latest_daily_jam =
g_date_time_ref (timecodestamper->ltc_daily_jam);
}
if (timecodestamper->ltc_internal_tc) {
if (timecodestamper->ltc_internal_tc->config.latest_daily_jam) {
g_date_time_unref (timecodestamper->ltc_internal_tc->config.
latest_daily_jam);
}
timecodestamper->ltc_internal_tc->config.latest_daily_jam =
g_date_time_ref (timecodestamper->ltc_daily_jam);
}
#endif
break;
case PROP_POST_MESSAGES:
timecodestamper->post_messages = g_value_get_boolean (value);
break;
case PROP_SET_INTERNAL_TIMECODE:{
if (timecodestamper->set_internal_tc)
gst_video_time_code_free (timecodestamper->set_internal_tc);
timecodestamper->set_internal_tc = g_value_dup_boxed (value);
/* Reset the internal timecode on the next opportunity if a new
* timecode was set here. If none was set we just continue counting
* from the previous one */
if (timecodestamper->set_internal_tc && timecodestamper->internal_tc) {
gst_video_time_code_free (timecodestamper->internal_tc);
timecodestamper->internal_tc = NULL;
}
break;
}
case PROP_LTC_AUTO_RESYNC:
timecodestamper->ltc_auto_resync = g_value_get_boolean (value);
break;
case PROP_RTC_MAX_DRIFT:
timecodestamper->rtc_max_drift = g_value_get_uint64 (value);
break;
case PROP_RTC_AUTO_RESYNC:
timecodestamper->rtc_auto_resync = g_value_get_boolean (value);
break;
case PROP_TIMECODE_OFFSET:
timecodestamper->timecode_offset = g_value_get_int (value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
GST_OBJECT_UNLOCK (timecodestamper);
}
static void
gst_timecodestamper_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec)
{
GstTimeCodeStamper *timecodestamper = GST_TIME_CODE_STAMPER (object);
GST_OBJECT_LOCK (timecodestamper);
switch (prop_id) {
case PROP_SOURCE:
g_value_set_enum (value, timecodestamper->tc_source);
break;
case PROP_SET:
g_value_set_enum (value, timecodestamper->tc_set);
break;
case PROP_DROP_FRAME:
g_value_set_boolean (value, timecodestamper->drop_frame);
break;
case PROP_LTC_DAILY_JAM:
g_value_set_boxed (value, timecodestamper->ltc_daily_jam);
break;
case PROP_POST_MESSAGES:
g_value_set_boolean (value, timecodestamper->post_messages);
break;
case PROP_SET_INTERNAL_TIMECODE:
g_value_set_boxed (value, timecodestamper->set_internal_tc);
break;
case PROP_LTC_AUTO_RESYNC:
g_value_set_boolean (value, timecodestamper->ltc_auto_resync);
break;
case PROP_RTC_MAX_DRIFT:
g_value_set_uint64 (value, timecodestamper->rtc_max_drift);
break;
case PROP_RTC_AUTO_RESYNC:
g_value_set_boolean (value, timecodestamper->rtc_auto_resync);
break;
case PROP_TIMECODE_OFFSET:
g_value_set_int (value, timecodestamper->timecode_offset);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
GST_OBJECT_UNLOCK (timecodestamper);
}
static gboolean
gst_timecodestamper_stop (GstBaseTransform * trans)
{
GstTimeCodeStamper *timecodestamper = GST_TIME_CODE_STAMPER (trans);
#if HAVE_LTC
g_mutex_lock (&timecodestamper->mutex);
timecodestamper->video_flushing = TRUE;
timecodestamper->ltc_flushing = TRUE;
g_cond_signal (&timecodestamper->ltc_cond_video);
g_cond_signal (&timecodestamper->ltc_cond_audio);
g_mutex_unlock (&timecodestamper->mutex);
#endif
gst_video_info_init (&timecodestamper->vinfo);
if (timecodestamper->internal_tc != NULL) {
gst_video_time_code_free (timecodestamper->internal_tc);
timecodestamper->internal_tc = NULL;
}
if (timecodestamper->rtc_tc != NULL) {
gst_video_time_code_free (timecodestamper->rtc_tc);
timecodestamper->rtc_tc = NULL;
}
if (timecodestamper->last_tc != NULL) {
gst_video_time_code_free (timecodestamper->last_tc);
timecodestamper->last_tc = NULL;
}
#if HAVE_LTC
g_mutex_lock (&timecodestamper->mutex);
gst_audio_info_init (&timecodestamper->ainfo);
gst_segment_init (&timecodestamper->ltc_segment, GST_FORMAT_UNDEFINED);
timecodestamper->ltc_first_running_time = GST_CLOCK_TIME_NONE;
timecodestamper->ltc_current_running_time = GST_CLOCK_TIME_NONE;
if (timecodestamper->ltc_internal_tc != NULL) {
gst_video_time_code_free (timecodestamper->ltc_internal_tc);
timecodestamper->ltc_internal_tc = NULL;
}
if (timecodestamper->ltc_current_tc != NULL) {
gst_video_time_code_free (timecodestamper->ltc_current_tc);
timecodestamper->ltc_current_tc = NULL;
}
timecodestamper->ltc_current_tc_running_time = GST_CLOCK_TIME_NONE;
if (timecodestamper->ltc_dec) {
ltc_decoder_free (timecodestamper->ltc_dec);
timecodestamper->ltc_dec = NULL;
}
if (timecodestamper->stream_align) {
gst_audio_stream_align_free (timecodestamper->stream_align);
timecodestamper->stream_align = NULL;
}
timecodestamper->ltc_total = 0;
g_mutex_unlock (&timecodestamper->mutex);
#endif
return TRUE;
}
static gboolean
gst_timecodestamper_start (GstBaseTransform * trans)
{
#if HAVE_LTC
GstTimeCodeStamper *timecodestamper = GST_TIME_CODE_STAMPER (trans);
g_mutex_lock (&timecodestamper->mutex);
timecodestamper->video_flushing = FALSE;
timecodestamper->video_eos = FALSE;
g_mutex_unlock (&timecodestamper->mutex);
#endif
return TRUE;
}
/* Must be called with object lock */
static void
gst_timecodestamper_update_drop_frame (GstTimeCodeStamper * timecodestamper)
{
if (timecodestamper->drop_frame && timecodestamper->vinfo.fps_d == 1001 &&
(timecodestamper->vinfo.fps_n == 30000 ||
timecodestamper->vinfo.fps_n == 60000)) {
if (timecodestamper->internal_tc)
timecodestamper->internal_tc->config.flags |=
GST_VIDEO_TIME_CODE_FLAGS_DROP_FRAME;
if (timecodestamper->rtc_tc)
timecodestamper->rtc_tc->config.flags |=
GST_VIDEO_TIME_CODE_FLAGS_DROP_FRAME;
#if HAVE_LTC
if (timecodestamper->ltc_current_tc)
timecodestamper->ltc_current_tc->config.flags |=
GST_VIDEO_TIME_CODE_FLAGS_DROP_FRAME;
if (timecodestamper->ltc_internal_tc)
timecodestamper->ltc_internal_tc->config.flags |=
GST_VIDEO_TIME_CODE_FLAGS_DROP_FRAME;
#endif
} else {
if (timecodestamper->internal_tc)
timecodestamper->internal_tc->config.flags &=
~GST_VIDEO_TIME_CODE_FLAGS_DROP_FRAME;
if (timecodestamper->rtc_tc)
timecodestamper->rtc_tc->config.flags &=
~GST_VIDEO_TIME_CODE_FLAGS_DROP_FRAME;
#if HAVE_LTC
if (timecodestamper->ltc_current_tc)
timecodestamper->ltc_current_tc->config.flags &=
~GST_VIDEO_TIME_CODE_FLAGS_DROP_FRAME;
if (timecodestamper->ltc_internal_tc)
timecodestamper->ltc_internal_tc->config.flags &=
~GST_VIDEO_TIME_CODE_FLAGS_DROP_FRAME;
#endif
}
}
static void
gst_timecodestamper_update_timecode_framerate (GstTimeCodeStamper *
timecodestamper, const GstVideoInfo * vinfo, GstVideoTimeCode * timecode)
{
guint64 nframes;
GstClockTime time;
GDateTime *jam = NULL;
GstVideoTimeCodeFlags tc_flags = 0;
if (!timecode)
return;
if (timecodestamper->vinfo.interlace_mode !=
GST_VIDEO_INTERLACE_MODE_PROGRESSIVE)
tc_flags |= GST_VIDEO_TIME_CODE_FLAGS_INTERLACED;
if (timecodestamper->drop_frame && timecodestamper->vinfo.fps_d == 1001 &&
(timecodestamper->vinfo.fps_n == 30000 ||
timecodestamper->vinfo.fps_n == 60000))
tc_flags |= GST_VIDEO_TIME_CODE_FLAGS_DROP_FRAME;
nframes = gst_video_time_code_frames_since_daily_jam (timecode);
time =
gst_util_uint64_scale (nframes, GST_SECOND * timecodestamper->vinfo.fps_d,
timecodestamper->vinfo.fps_n);
jam =
timecode->config.latest_daily_jam ? g_date_time_ref (timecode->
config.latest_daily_jam) : NULL;
gst_video_time_code_clear (timecode);
gst_video_time_code_init (timecode, timecodestamper->vinfo.fps_n,
timecodestamper->vinfo.fps_d, jam, tc_flags, 0, 0, 0, 0, 0);
if (jam)
g_date_time_unref (jam);
nframes =
gst_util_uint64_scale (time, vinfo->fps_n, GST_SECOND * vinfo->fps_d);
gst_video_time_code_add_frames (timecode, nframes);
}
/* Must be called with object lock */
static void
gst_timecodestamper_update_framerate (GstTimeCodeStamper * timecodestamper,
const GstVideoInfo * vinfo)
{
/* Nothing changed */
if (vinfo->fps_n == timecodestamper->vinfo.fps_n &&
vinfo->fps_d == timecodestamper->vinfo.fps_d)
return;
gst_timecodestamper_update_timecode_framerate (timecodestamper, vinfo,
timecodestamper->internal_tc);
gst_timecodestamper_update_timecode_framerate (timecodestamper, vinfo,
timecodestamper->last_tc);
gst_timecodestamper_update_timecode_framerate (timecodestamper, vinfo,
timecodestamper->rtc_tc);
#if HAVE_LTC
gst_timecodestamper_update_timecode_framerate (timecodestamper, vinfo,
timecodestamper->ltc_current_tc);
gst_timecodestamper_update_timecode_framerate (timecodestamper, vinfo,
timecodestamper->ltc_internal_tc);
#endif
}
static gboolean
gst_timecodestamper_sink_event (GstBaseTransform * trans, GstEvent * event)
{
gboolean ret = FALSE;
GstTimeCodeStamper *timecodestamper = GST_TIME_CODE_STAMPER (trans);
GST_DEBUG_OBJECT (trans, "received event %" GST_PTR_FORMAT, event);
switch (GST_EVENT_TYPE (event)) {
case GST_EVENT_SEGMENT:
{
GstSegment segment;
gst_event_copy_segment (event, &segment);
if (segment.format != GST_FORMAT_TIME) {
GST_ERROR_OBJECT (timecodestamper, "Invalid segment format");
gst_event_unref (event);
return FALSE;
}
break;
}
case GST_EVENT_CAPS:
{
GstCaps *caps;
GstVideoInfo info;
GST_OBJECT_LOCK (timecodestamper);
gst_event_parse_caps (event, &caps);
if (!gst_video_info_from_caps (&info, caps)) {
GST_OBJECT_UNLOCK (timecodestamper);
gst_event_unref (event);
return FALSE;
}
if (info.fps_n == 0) {
GST_WARNING_OBJECT (timecodestamper,
"Non-constant frame rate found. Refusing to create a timecode");
GST_OBJECT_UNLOCK (timecodestamper);
gst_event_unref (event);
return FALSE;
}
gst_timecodestamper_update_framerate (timecodestamper, &info);
timecodestamper->vinfo = info;
GST_OBJECT_UNLOCK (timecodestamper);
break;
}
#if HAVE_LTC
case GST_EVENT_FLUSH_START:
g_mutex_lock (&timecodestamper->mutex);
timecodestamper->video_flushing = TRUE;
g_cond_signal (&timecodestamper->ltc_cond_video);
g_mutex_unlock (&timecodestamper->mutex);
break;
case GST_EVENT_FLUSH_STOP:
g_mutex_lock (&timecodestamper->mutex);
timecodestamper->video_flushing = FALSE;
timecodestamper->video_eos = FALSE;
g_mutex_unlock (&timecodestamper->mutex);
break;
case GST_EVENT_EOS:
g_mutex_lock (&timecodestamper->mutex);
timecodestamper->video_eos = TRUE;
g_cond_signal (&timecodestamper->ltc_cond_audio);
g_mutex_unlock (&timecodestamper->mutex);
break;
#endif
default:
break;
}
ret =
GST_BASE_TRANSFORM_CLASS (gst_timecodestamper_parent_class)->sink_event
(trans, event);
return ret;
}
static gboolean
remove_timecode_meta (GstBuffer * buffer, GstMeta ** meta, gpointer user_data)
{
if (meta && *meta && (*meta)->info->api == GST_VIDEO_TIME_CODE_META_API_TYPE) {
*meta = NULL;
}
return TRUE;
}
static GstFlowReturn
gst_timecodestamper_transform_ip (GstBaseTransform * vfilter,
GstBuffer * buffer)
{
GstTimeCodeStamper *timecodestamper = GST_TIME_CODE_STAMPER (vfilter);
GstClockTime running_time, base_time, clock_time;
GstClock *clock;
GstClockTime clock_time_now;
GDateTime *dt_now, *dt_frame;
GstVideoTimeCode *tc = NULL;
gboolean free_tc = FALSE;
GstVideoTimeCodeMeta *tc_meta;
GstFlowReturn flow_ret = GST_FLOW_OK;
GstVideoTimeCodeFlags tc_flags = 0;
if (timecodestamper->vinfo.fps_n == 0 || timecodestamper->vinfo.fps_d == 0
|| !GST_BUFFER_PTS_IS_VALID (buffer)) {
gst_buffer_unref (buffer);
return GST_FLOW_NOT_NEGOTIATED;
}
/* Collect all the current times */
base_time = gst_element_get_base_time (GST_ELEMENT (timecodestamper));
clock = gst_element_get_clock (GST_ELEMENT (timecodestamper));
if (clock) {
clock_time_now = gst_clock_get_time (clock);
gst_object_unref (clock);
} else {
clock_time_now = GST_CLOCK_TIME_NONE;
}
dt_now = g_date_time_new_now_local ();
running_time =
gst_segment_to_running_time (&vfilter->segment, GST_FORMAT_TIME,
GST_BUFFER_PTS (buffer));
if (clock_time_now != GST_CLOCK_TIME_NONE) {
gdouble seconds_diff;
clock_time = running_time + base_time;
if (clock_time_now > clock_time) {
seconds_diff = (clock_time_now - clock_time) / -1000000000.0;
} else {
seconds_diff = (clock_time - clock_time_now) / 1000000000.0;
}
dt_frame = g_date_time_add_seconds (dt_now, seconds_diff);
} else {
/* If we have no clock we can't really know the time of the frame */
dt_frame = g_date_time_ref (dt_now);
}
GST_DEBUG_OBJECT (timecodestamper,
"Handling video frame with running time %" GST_TIME_FORMAT,
GST_TIME_ARGS (running_time));
tc_meta = gst_buffer_get_video_time_code_meta (buffer);
/* Update all our internal timecodes as needed */
GST_OBJECT_LOCK (timecodestamper);
if (timecodestamper->vinfo.interlace_mode !=
GST_VIDEO_INTERLACE_MODE_PROGRESSIVE)
tc_flags |= GST_VIDEO_TIME_CODE_FLAGS_INTERLACED;
if (timecodestamper->drop_frame && timecodestamper->vinfo.fps_d == 1001 &&
(timecodestamper->vinfo.fps_n == 30000 ||
timecodestamper->vinfo.fps_n == 60000))
tc_flags |= GST_VIDEO_TIME_CODE_FLAGS_DROP_FRAME;
/* If we don't have an internal timecode yet then either a new one was just
* set via the property or we just started. Initialize it here, otherwise
* increment it by one */
if (!timecodestamper->internal_tc) {
gchar *tc_str;
if (timecodestamper->set_internal_tc)
timecodestamper->internal_tc =
gst_video_time_code_new (timecodestamper->vinfo.fps_n,
timecodestamper->vinfo.fps_d,
timecodestamper->set_internal_tc->config.latest_daily_jam,
tc_flags,
timecodestamper->set_internal_tc->hours,
timecodestamper->set_internal_tc->minutes,
timecodestamper->set_internal_tc->seconds,
timecodestamper->set_internal_tc->frames,
timecodestamper->set_internal_tc->field_count);
else
timecodestamper->internal_tc =
gst_video_time_code_new (timecodestamper->vinfo.fps_n,
timecodestamper->vinfo.fps_d, dt_frame, tc_flags, 0, 0, 0, 0, 0);
tc_str = gst_video_time_code_to_string (timecodestamper->internal_tc);
GST_DEBUG_OBJECT (timecodestamper, "Initialized internal timecode to %s",
tc_str);
g_free (tc_str);
} else {
gchar *tc_str;
gst_video_time_code_increment_frame (timecodestamper->internal_tc);
tc_str = gst_video_time_code_to_string (timecodestamper->internal_tc);
GST_DEBUG_OBJECT (timecodestamper, "Incremented internal timecode to %s",
tc_str);
g_free (tc_str);
}
/* If we have a new timecode on the incoming frame, update our last known
* timecode or otherwise increment it by one */
if (tc_meta) {
gchar *tc_str;
if (timecodestamper->last_tc)
gst_video_time_code_free (timecodestamper->last_tc);
timecodestamper->last_tc = gst_video_time_code_copy (&tc_meta->tc);
tc_str = gst_video_time_code_to_string (timecodestamper->last_tc);
GST_DEBUG_OBJECT (timecodestamper, "Updated upstream timecode to %s",
tc_str);
g_free (tc_str);
} else {
gchar *tc_str;
if (timecodestamper->last_tc) {
gst_video_time_code_increment_frame (timecodestamper->last_tc);
} else {
/* We have no last known timecode so initialize with 0 here */
timecodestamper->last_tc =
gst_video_time_code_new (timecodestamper->vinfo.fps_n,
timecodestamper->vinfo.fps_d, dt_frame, tc_flags, 0, 0, 0, 0, 0);
}
tc_str = gst_video_time_code_to_string (timecodestamper->last_tc);
GST_DEBUG_OBJECT (timecodestamper, "Incremented upstream timecode to %s",
tc_str);
g_free (tc_str);
}
/* Update RTC-based timecode */
{
GstVideoTimeCode rtc_timecode_now;
gchar *tc_str, *dt_str;
/* Create timecode for the current frame time */
memset (&rtc_timecode_now, 0, sizeof (rtc_timecode_now));
gst_video_time_code_init_from_date_time_full (&rtc_timecode_now,
timecodestamper->vinfo.fps_n, timecodestamper->vinfo.fps_d, dt_frame,
tc_flags, 0);
tc_str = gst_video_time_code_to_string (&rtc_timecode_now);
dt_str = g_date_time_format (dt_frame, "%F %R %z");
GST_DEBUG_OBJECT (timecodestamper,
"Created RTC timecode %s for %s (%06u us)", tc_str, dt_str,
g_date_time_get_microsecond (dt_frame));
g_free (dt_str);
g_free (tc_str);
/* If we don't have an RTC timecode yet, directly initialize with this one */
if (!timecodestamper->rtc_tc) {
timecodestamper->rtc_tc = gst_video_time_code_copy (&rtc_timecode_now);
tc_str = gst_video_time_code_to_string (timecodestamper->rtc_tc);
GST_DEBUG_OBJECT (timecodestamper, "Initialized RTC timecode to %s",
tc_str);
g_free (tc_str);
} else {
GstClockTime rtc_now_time, rtc_tc_time;
GstClockTime rtc_diff;
/* Increment the old RTC timecode to this frame */
gst_video_time_code_increment_frame (timecodestamper->rtc_tc);
/* Otherwise check if we drifted too much and need to resync */
rtc_tc_time =
gst_video_time_code_nsec_since_daily_jam (timecodestamper->rtc_tc);
rtc_now_time =
gst_video_time_code_nsec_since_daily_jam (&rtc_timecode_now);
if (rtc_tc_time > rtc_now_time)
rtc_diff = rtc_tc_time - rtc_now_time;
else
rtc_diff = rtc_now_time - rtc_tc_time;
if (timecodestamper->rtc_auto_resync
&& timecodestamper->rtc_max_drift != GST_CLOCK_TIME_NONE
&& rtc_diff > timecodestamper->rtc_max_drift) {
gst_video_time_code_free (timecodestamper->rtc_tc);
timecodestamper->rtc_tc = gst_video_time_code_copy (&rtc_timecode_now);
tc_str = gst_video_time_code_to_string (timecodestamper->rtc_tc);
GST_DEBUG_OBJECT (timecodestamper,
"Updated RTC timecode to %s (%s%" GST_TIME_FORMAT " drift)", tc_str,
(rtc_tc_time > rtc_now_time ? "-" : "+"), GST_TIME_ARGS (rtc_diff));
g_free (tc_str);
} else {
/* Else nothing to do here, we use the current one */
tc_str = gst_video_time_code_to_string (timecodestamper->rtc_tc);
GST_DEBUG_OBJECT (timecodestamper,
"Incremented RTC timecode to %s (%s%" GST_TIME_FORMAT " drift)",
tc_str, (rtc_tc_time > rtc_now_time ? "-" : "+"),
GST_TIME_ARGS (rtc_diff));
g_free (tc_str);
}
}
gst_video_time_code_clear (&rtc_timecode_now);
}
GST_OBJECT_UNLOCK (timecodestamper);
/* Update LTC-based timecode as needed */
#if HAVE_LTC
{
GstClockTime frame_duration;
gchar *tc_str;
LTCFrameExt ltc_frame;
gboolean updated_internal = FALSE;
frame_duration = gst_util_uint64_scale_int_ceil (GST_SECOND,
timecodestamper->vinfo.fps_d, timecodestamper->vinfo.fps_n);
g_mutex_lock (&timecodestamper->mutex);
/* Wait until the the audio is at least 2 frame durations ahead of the
* video to allow for some slack, or the video pad is flushing or the
* LTC pad is EOS. */
while ((timecodestamper->ltc_current_running_time == GST_CLOCK_TIME_NONE
|| timecodestamper->ltc_current_running_time <
running_time + 2 * frame_duration)
&& !timecodestamper->video_flushing && !timecodestamper->ltc_eos) {
g_cond_wait (&timecodestamper->ltc_cond_video, &timecodestamper->mutex);
}
if (timecodestamper->video_flushing) {
g_mutex_unlock (&timecodestamper->mutex);
flow_ret = GST_FLOW_FLUSHING;
goto out;
}
GST_OBJECT_LOCK (timecodestamper);
/* Take timecodes out of the queue until we're at the current video
* position, but first check the last timecode we took out of the queue
* if any. */
while (timecodestamper->ltc_dec && (timecodestamper->ltc_current_tc
|| ltc_decoder_read (timecodestamper->ltc_dec, &ltc_frame) == 1)) {
GstVideoTimeCode ltc_read_tc, *ltc_read_tc_ptr = NULL;
GstClockTime ltc_running_time;
memset (&ltc_read_tc, 0, sizeof (ltc_read_tc));
if (timecodestamper->ltc_current_tc) {
ltc_running_time = timecodestamper->ltc_current_tc_running_time;
ltc_read_tc_ptr = timecodestamper->ltc_current_tc;
tc_str =
gst_video_time_code_to_string (timecodestamper->ltc_current_tc);
GST_INFO_OBJECT (timecodestamper,
"Using previous LTC timecode %s at %" GST_TIME_FORMAT, tc_str,
GST_TIME_ARGS (ltc_running_time));
g_free (tc_str);
} else {
SMPTETimecode stc;
gint fps_n_div;
if (ltc_frame.off_start < 0) {
GstClockTime offset =
gst_util_uint64_scale (GST_SECOND, -ltc_frame.off_start,
timecodestamper->ainfo.rate);
if (offset > timecodestamper->ltc_first_running_time)
ltc_running_time = 0;
else
ltc_running_time = timecodestamper->ltc_first_running_time - offset;
} else {
ltc_running_time = timecodestamper->ltc_first_running_time +
gst_util_uint64_scale (GST_SECOND, ltc_frame.off_start,
timecodestamper->ainfo.rate);
}
ltc_frame_to_time (&stc, &ltc_frame.ltc, 0);
GST_INFO_OBJECT (timecodestamper,
"Got LTC timecode %02d:%02d:%02d:%02d at %" GST_TIME_FORMAT,
stc.hours, stc.mins, stc.secs, stc.frame,
GST_TIME_ARGS (ltc_running_time));
fps_n_div =
((gdouble) timecodestamper->vinfo.fps_n) /
timecodestamper->vinfo.fps_d > 30 ? 2 : 1;
gst_video_time_code_clear (&ltc_read_tc);
gst_video_time_code_init (&ltc_read_tc,
timecodestamper->vinfo.fps_n / fps_n_div,
timecodestamper->vinfo.fps_d,
timecodestamper->ltc_daily_jam,
tc_flags, stc.hours, stc.mins, stc.secs, stc.frame, 0);
ltc_read_tc_ptr = &ltc_read_tc;
}
/* A timecode frame that starts +/- half a frame to the
* video frame is considered belonging to that video frame.
*
* If it's further ahead than half a frame duration, break out of
* the loop here and reconsider on the next frame. */
if (ABSDIFF (running_time, ltc_running_time) <= frame_duration / 2) {
/* If we're resyncing LTC in general, directly replace the current
* LTC timecode with the new one we read. Otherwise we'll continue
* counting based on the previous timecode we had
*/
if (timecodestamper->ltc_auto_resync) {
if (timecodestamper->ltc_internal_tc)
gst_video_time_code_free (timecodestamper->ltc_internal_tc);
timecodestamper->ltc_internal_tc =
gst_video_time_code_copy (ltc_read_tc_ptr);
updated_internal = TRUE;
GST_INFO_OBJECT (timecodestamper, "Resynced internal LTC counter");
}
/* And store it for the next frame in case it has more or less the
* same running time */
timecodestamper->ltc_current_tc =
gst_video_time_code_copy (ltc_read_tc_ptr);
timecodestamper->ltc_current_tc_running_time = ltc_running_time;
gst_video_time_code_clear (&ltc_read_tc);
break;
} else if (ltc_running_time > running_time
&& ltc_running_time - running_time > frame_duration / 2) {
/* Store it for the next frame */
timecodestamper->ltc_current_tc =
gst_video_time_code_copy (ltc_read_tc_ptr);
timecodestamper->ltc_current_tc_running_time = ltc_running_time;
gst_video_time_code_clear (&ltc_read_tc);
break;
}
/* otherwise it's in the past and we need to consider the next
* timecode. Forget the current timecode and read a new one */
if (timecodestamper->ltc_current_tc) {
gst_video_time_code_free (timecodestamper->ltc_current_tc);
timecodestamper->ltc_current_tc = NULL;
timecodestamper->ltc_current_tc_running_time = GST_CLOCK_TIME_NONE;
}
gst_video_time_code_clear (&ltc_read_tc);
}
/* If we didn't update from LTC above, increment our internal timecode
* for this frame */
if (!updated_internal && timecodestamper->ltc_internal_tc) {
gst_video_time_code_increment_frame (timecodestamper->ltc_internal_tc);
}
if (timecodestamper->ltc_internal_tc) {
tc_str = gst_video_time_code_to_string (timecodestamper->ltc_internal_tc);
GST_DEBUG_OBJECT (timecodestamper, "Updated LTC timecode to %s", tc_str);
g_free (tc_str);
} else {
GST_DEBUG_OBJECT (timecodestamper, "Have no LTC timecode yet");
}
GST_OBJECT_UNLOCK (timecodestamper);
g_cond_signal (&timecodestamper->ltc_cond_audio);
g_mutex_unlock (&timecodestamper->mutex);
}
#endif
GST_OBJECT_LOCK (timecodestamper);
switch (timecodestamper->tc_source) {
case GST_TIME_CODE_STAMPER_SOURCE_INTERNAL:
tc = timecodestamper->internal_tc;
break;
case GST_TIME_CODE_STAMPER_SOURCE_ZERO:
tc = gst_video_time_code_new (timecodestamper->vinfo.fps_n,
timecodestamper->vinfo.fps_d, NULL, tc_flags, 0, 0, 0, 0, 0);
free_tc = TRUE;
break;
case GST_TIME_CODE_STAMPER_SOURCE_LAST_KNOWN:
tc = timecodestamper->last_tc;
break;
case GST_TIME_CODE_STAMPER_SOURCE_LTC:
#if HAVE_LTC
if (timecodestamper->ltc_current_tc)
tc = timecodestamper->ltc_current_tc;
#endif
if (!tc) {
tc = gst_video_time_code_new (timecodestamper->vinfo.fps_n,
timecodestamper->vinfo.fps_d, NULL, tc_flags, 0, 0, 0, 0, 0);
free_tc = TRUE;
}
break;
case GST_TIME_CODE_STAMPER_SOURCE_RTC:
tc = timecodestamper->rtc_tc;
break;
}
switch (timecodestamper->tc_set) {
case GST_TIME_CODE_STAMPER_SET_NEVER:
break;
case GST_TIME_CODE_STAMPER_SET_KEEP:
if (!tc_meta && tc) {
gchar *tc_str;
if (timecodestamper->timecode_offset) {
if (!free_tc) {
tc = gst_video_time_code_copy (tc);
free_tc = TRUE;
}
gst_video_time_code_add_frames (tc, timecodestamper->timecode_offset);
}
tc_str = gst_video_time_code_to_string (tc);
GST_DEBUG_OBJECT (timecodestamper, "Storing timecode %s", tc_str);
g_free (tc_str);
gst_buffer_add_video_time_code_meta (buffer, tc);
}
break;
case GST_TIME_CODE_STAMPER_SET_ALWAYS:
gst_buffer_foreach_meta (buffer, remove_timecode_meta, NULL);
if (tc) {
gchar *tc_str;
if (timecodestamper->timecode_offset) {
if (!free_tc) {
tc = gst_video_time_code_copy (tc);
free_tc = TRUE;
}
gst_video_time_code_add_frames (tc, timecodestamper->timecode_offset);
}
tc_str = gst_video_time_code_to_string (tc);
GST_DEBUG_OBJECT (timecodestamper, "Storing timecode %s", tc_str);
g_free (tc_str);
gst_buffer_add_video_time_code_meta (buffer, tc);
}
break;
}
GST_OBJECT_UNLOCK (timecodestamper);
if (timecodestamper->post_messages && tc) {
GstClockTime stream_time, running_time, duration;
GstStructure *s;
GstMessage *msg;
running_time =
gst_segment_to_running_time (&vfilter->segment, GST_FORMAT_TIME,
GST_BUFFER_PTS (buffer));
stream_time =
gst_segment_to_stream_time (&vfilter->segment, GST_FORMAT_TIME,
GST_BUFFER_PTS (buffer));
duration =
gst_util_uint64_scale_int (GST_SECOND, timecodestamper->vinfo.fps_d,
timecodestamper->vinfo.fps_n);
s = gst_structure_new ("timecodestamper", "timestamp", G_TYPE_UINT64,
GST_BUFFER_PTS (buffer), "stream-time", G_TYPE_UINT64, stream_time,
"running-time", G_TYPE_UINT64, running_time, "duration",
G_TYPE_UINT64, duration, "timecode", GST_TYPE_VIDEO_TIME_CODE, tc,
NULL);
msg = gst_message_new_element (GST_OBJECT (timecodestamper), s);
gst_element_post_message (GST_ELEMENT (timecodestamper), msg);
}
#if HAVE_LTC
out:
#endif
if (dt_now)
g_date_time_unref (dt_now);
if (dt_frame)
g_date_time_unref (dt_frame);
if (free_tc && tc)
gst_video_time_code_free (tc);
return flow_ret;
}
static GstPad *
gst_timecodestamper_request_new_pad (GstElement * element,
GstPadTemplate * templ, const gchar * name_templ, const GstCaps * caps)
{
#if HAVE_LTC
GstTimeCodeStamper *timecodestamper = GST_TIME_CODE_STAMPER (element);
GST_OBJECT_LOCK (timecodestamper);
if (timecodestamper->ltcpad) {
GST_OBJECT_UNLOCK (timecodestamper);
return NULL;
}
timecodestamper->ltcpad = gst_pad_new_from_static_template
(&gst_timecodestamper_ltc_template, "ltc");
gst_pad_set_chain_function (timecodestamper->ltcpad,
GST_DEBUG_FUNCPTR (gst_timecodestamper_ltcpad_chain));
gst_pad_set_event_function (timecodestamper->ltcpad,
GST_DEBUG_FUNCPTR (gst_timecodestamper_ltcpad_event));
gst_pad_set_query_function (timecodestamper->ltcpad,
GST_DEBUG_FUNCPTR (gst_timecodestamper_ltcpad_query));
gst_pad_set_activatemode_function (timecodestamper->ltcpad,
GST_DEBUG_FUNCPTR (gst_timecodestamper_ltcpad_activatemode));
GST_OBJECT_UNLOCK (timecodestamper);
gst_element_add_pad (element, timecodestamper->ltcpad);
return timecodestamper->ltcpad;
#else
return NULL;
#endif
}
static void
gst_timecodestamper_release_pad (GstElement * element, GstPad * pad)
{
#if HAVE_LTC
GstTimeCodeStamper *timecodestamper = GST_TIME_CODE_STAMPER (element);
GST_OBJECT_LOCK (timecodestamper);
if (timecodestamper->ltcpad != pad) {
GST_OBJECT_UNLOCK (timecodestamper);
return;
}
timecodestamper->ltcpad = NULL;
if (timecodestamper->ltc_internal_tc != NULL) {
gst_video_time_code_free (timecodestamper->ltc_internal_tc);
timecodestamper->ltc_internal_tc = NULL;
}
if (timecodestamper->ltc_current_tc != NULL) {
gst_video_time_code_free (timecodestamper->ltc_current_tc);
timecodestamper->ltc_current_tc = NULL;
}
timecodestamper->ltc_current_tc_running_time = GST_CLOCK_TIME_NONE;
GST_OBJECT_UNLOCK (timecodestamper);
gst_pad_set_active (pad, FALSE);
g_mutex_lock (&timecodestamper->mutex);
timecodestamper->ltc_flushing = TRUE;
timecodestamper->ltc_eos = TRUE;
g_cond_signal (&timecodestamper->ltc_cond_video);
g_cond_signal (&timecodestamper->ltc_cond_audio);
gst_audio_info_init (&timecodestamper->ainfo);
gst_segment_init (&timecodestamper->ltc_segment, GST_FORMAT_UNDEFINED);
timecodestamper->ltc_first_running_time = GST_CLOCK_TIME_NONE;
timecodestamper->ltc_current_running_time = GST_CLOCK_TIME_NONE;
if (timecodestamper->ltc_dec) {
ltc_decoder_free (timecodestamper->ltc_dec);
timecodestamper->ltc_dec = NULL;
}
if (timecodestamper->stream_align) {
gst_audio_stream_align_free (timecodestamper->stream_align);
timecodestamper->stream_align = NULL;
}
timecodestamper->ltc_total = 0;
g_mutex_unlock (&timecodestamper->mutex);
gst_element_remove_pad (element, pad);
#endif
}
#if HAVE_LTC
static GstFlowReturn
gst_timecodestamper_ltcpad_chain (GstPad * pad,
GstObject * parent, GstBuffer * buffer)
{
GstFlowReturn fr = GST_FLOW_OK;
GstTimeCodeStamper *timecodestamper = GST_TIME_CODE_STAMPER (parent);
GstMapInfo map;
GstClockTime timestamp, running_time, duration;
guint nsamples;
gboolean discont;
g_mutex_lock (&timecodestamper->mutex);
if (timecodestamper->ltc_flushing) {
g_mutex_unlock (&timecodestamper->mutex);
gst_buffer_unref (buffer);
return GST_FLOW_FLUSHING;
}
nsamples = gst_buffer_get_size (buffer) /
GST_AUDIO_INFO_BPF (&timecodestamper->ainfo);
if (!timecodestamper->stream_align) {
timecodestamper->stream_align =
gst_audio_stream_align_new (timecodestamper->ainfo.rate, GST_SECOND,
40 * GST_MSECOND);
}
discont =
gst_audio_stream_align_process (timecodestamper->stream_align,
GST_BUFFER_IS_DISCONT (buffer), GST_BUFFER_PTS (buffer), nsamples,
&timestamp, &duration, NULL);
if (discont) {
if (timecodestamper->ltc_dec)
ltc_decoder_queue_flush (timecodestamper->ltc_dec);
timecodestamper->ltc_total = 0;
}
if (!timecodestamper->ltc_dec) {
gint samples_per_frame = 1920;
GST_OBJECT_LOCK (timecodestamper);
/* This is only for initialization and needs to be somewhat close to the
* real value. It will be tracked automatically afterwards */
if (timecodestamper->vinfo.fps_n) {
samples_per_frame = timecodestamper->ainfo.rate *
timecodestamper->vinfo.fps_d / timecodestamper->vinfo.fps_n;
}
GST_OBJECT_UNLOCK (timecodestamper);
timecodestamper->ltc_dec =
ltc_decoder_create (samples_per_frame, DEFAULT_LTC_QUEUE);
timecodestamper->ltc_total = 0;
}
running_time = gst_segment_to_running_time (&timecodestamper->ltc_segment,
GST_FORMAT_TIME, timestamp);
timecodestamper->ltc_current_running_time = running_time + duration;
GST_DEBUG_OBJECT (timecodestamper,
"Handling LTC audio buffer at %" GST_TIME_FORMAT " - %" GST_TIME_FORMAT
" (offset %" G_GUINT64_FORMAT ")",
GST_TIME_ARGS (running_time),
GST_TIME_ARGS (timecodestamper->ltc_current_running_time),
(guint64) timecodestamper->ltc_total);
if (timecodestamper->ltc_total == 0) {
timecodestamper->ltc_first_running_time = running_time;
}
gst_buffer_map (buffer, &map, GST_MAP_READ);
ltc_decoder_write (timecodestamper->ltc_dec, map.data, map.size,
timecodestamper->ltc_total);
timecodestamper->ltc_total += map.size;
gst_buffer_unmap (buffer, &map);
g_cond_signal (&timecodestamper->ltc_cond_video);
/* Wait until the video caught up if we already queued up a lot of pending
* timecodes, or until video is EOS or the LTC pad is flushing. */
while (ltc_decoder_queue_length (timecodestamper->ltc_dec) >
DEFAULT_LTC_QUEUE / 2 && !timecodestamper->video_eos
&& !timecodestamper->ltc_flushing) {
g_cond_wait (&timecodestamper->ltc_cond_audio, &timecodestamper->mutex);
}
if (timecodestamper->ltc_flushing)
fr = GST_FLOW_FLUSHING;
else
fr = GST_FLOW_OK;
g_mutex_unlock (&timecodestamper->mutex);
gst_buffer_unref (buffer);
return fr;
}
static gboolean
gst_timecodestamper_ltcpad_event (GstPad * pad,
GstObject * parent, GstEvent * event)
{
GstTimeCodeStamper *timecodestamper = GST_TIME_CODE_STAMPER (parent);
GstCaps *caps;
gboolean ret = TRUE;
switch (GST_EVENT_TYPE (event)) {
case GST_EVENT_CAPS:
gst_event_parse_caps (event, &caps);
if (!gst_audio_info_from_caps (&timecodestamper->ainfo, caps)) {
gst_event_unref (event);
return FALSE;
}
if (timecodestamper->stream_align) {
gst_audio_stream_align_set_rate (timecodestamper->stream_align,
timecodestamper->ainfo.rate);
}
break;
case GST_EVENT_SEGMENT:
gst_event_copy_segment (event, &timecodestamper->ltc_segment);
break;
case GST_EVENT_FLUSH_START:
g_mutex_lock (&timecodestamper->mutex);
timecodestamper->ltc_flushing = TRUE;
g_cond_signal (&timecodestamper->ltc_cond_audio);
g_mutex_unlock (&timecodestamper->mutex);
break;
case GST_EVENT_FLUSH_STOP:
g_mutex_lock (&timecodestamper->mutex);
timecodestamper->ltc_flushing = FALSE;
timecodestamper->ltc_eos = FALSE;
gst_segment_init (&timecodestamper->ltc_segment, GST_FORMAT_UNDEFINED);
g_mutex_unlock (&timecodestamper->mutex);
break;
case GST_EVENT_EOS:
g_mutex_lock (&timecodestamper->mutex);
timecodestamper->ltc_eos = TRUE;
g_cond_signal (&timecodestamper->ltc_cond_video);
g_mutex_unlock (&timecodestamper->mutex);
break;
default:
break;
}
gst_event_unref (event);
return ret;
}
static gboolean
gst_timecodestamper_ltcpad_query (GstPad * pad,
GstObject * parent, GstQuery * query)
{
GstCaps *caps, *filter, *tcaps;
switch (GST_QUERY_TYPE (query)) {
case GST_QUERY_CAPS:
gst_query_parse_caps (query, &filter);
tcaps = gst_pad_get_pad_template_caps (pad);
if (filter)
caps = gst_caps_intersect_full (tcaps, filter,
GST_CAPS_INTERSECT_FIRST);
else
caps = gst_caps_ref (tcaps);
gst_query_set_caps_result (query, caps);
gst_caps_unref (tcaps);
gst_caps_unref (caps);
return TRUE;
default:
return gst_pad_query_default (pad, parent, query);
}
}
static gboolean
gst_timecodestamper_ltcpad_activatemode (GstPad * pad,
GstObject * parent, GstPadMode mode, gboolean active)
{
GstTimeCodeStamper *timecodestamper = GST_TIME_CODE_STAMPER (parent);
if (active) {
g_mutex_lock (&timecodestamper->mutex);
timecodestamper->ltc_flushing = FALSE;
timecodestamper->ltc_eos = FALSE;
g_mutex_unlock (&timecodestamper->mutex);
} else {
g_mutex_lock (&timecodestamper->mutex);
timecodestamper->ltc_flushing = TRUE;
timecodestamper->ltc_eos = TRUE;
g_cond_signal (&timecodestamper->ltc_cond_audio);
g_mutex_unlock (&timecodestamper->mutex);
}
return TRUE;
}
static gboolean
gst_timecodestamper_videopad_activatemode (GstPad * pad,
GstObject * parent, GstPadMode mode, gboolean active)
{
GstTimeCodeStamper *timecodestamper = GST_TIME_CODE_STAMPER (parent);
if (active) {
g_mutex_lock (&timecodestamper->mutex);
timecodestamper->video_flushing = FALSE;
timecodestamper->video_eos = FALSE;
g_mutex_unlock (&timecodestamper->mutex);
} else {
g_mutex_lock (&timecodestamper->mutex);
timecodestamper->video_flushing = TRUE;
g_cond_signal (&timecodestamper->ltc_cond_video);
g_mutex_unlock (&timecodestamper->mutex);
}
return timecodestamper->video_activatemode_default (pad, parent, mode,
active);
}
static GstIterator *
gst_timecodestamper_src_iterate_internal_link (GstPad * pad, GstObject * parent)
{
GstTimeCodeStamper *timecodestamper = GST_TIME_CODE_STAMPER (parent);
GValue value = G_VALUE_INIT;
GstIterator *it;
g_value_init (&value, GST_TYPE_PAD);
g_value_set_object (&value, GST_BASE_TRANSFORM_SINK_PAD (timecodestamper));
it = gst_iterator_new_single (GST_TYPE_PAD, &value);
g_value_unset (&value);
return it;
}
#endif
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