gstreamer/gst/timecode/gsttimecodestamper.c

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/*
* GStreamer
* Copyright (C) 2016 Vivia Nikolaidou <vivia@toolsonair.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 <stdlib.h>
#include <string.h>
GST_DEBUG_CATEGORY_STATIC (timecodestamper_debug);
#define GST_CAT_DEFAULT timecodestamper_debug
/* GstTimeCodeStamper properties */
enum
{
PROP_0,
PROP_OVERRIDE_EXISTING,
PROP_DROP_FRAME,
PROP_DAILY_JAM,
PROP_POST_MESSAGES,
PROP_FIRST_TIMECODE,
PROP_FIRST_NOW
};
#define DEFAULT_OVERRIDE_EXISTING FALSE
#define DEFAULT_DROP_FRAME FALSE
#define DEFAULT_DAILY_JAM NULL
#define DEFAULT_POST_MESSAGES FALSE
#define DEFAULT_FIRST_NOW FALSE
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 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);
G_DEFINE_TYPE (GstTimeCodeStamper, gst_timecodestamper,
GST_TYPE_BASE_TRANSFORM);
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_OVERRIDE_EXISTING,
g_param_spec_boolean ("override-existing", "Override existing timecode",
"If set to true, any existing timecode will be overridden",
DEFAULT_OVERRIDE_EXISTING,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_DROP_FRAME,
g_param_spec_boolean ("drop-frame", "Override existing timecode",
"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_DAILY_JAM,
g_param_spec_boxed ("daily-jam",
"Daily jam",
"The daily jam of the timecode",
G_TYPE_DATE_TIME, 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_FIRST_TIMECODE,
g_param_spec_boxed ("first-timecode",
"Timecode at the first frame",
"If set, take this timecode for the first frame and increment from "
"it. Only the values itself are taken, flags and frame rate are "
"always determined by timecodestamper itself. "
"If unset (and to-now is also not set), the timecode will start at 0",
GST_TYPE_VIDEO_TIME_CODE,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_FIRST_NOW,
g_param_spec_boolean ("first-timecode-to-now",
"Sets first timecode to system time",
"If true and first-timecode is unset, set it to system time "
"automatically when the first media segment is received.",
DEFAULT_FIRST_NOW, 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));
trans_class->sink_event = GST_DEBUG_FUNCPTR (gst_timecodestamper_sink_event);
trans_class->stop = GST_DEBUG_FUNCPTR (gst_timecodestamper_stop);
trans_class->transform_ip =
GST_DEBUG_FUNCPTR (gst_timecodestamper_transform_ip);
}
static void
gst_timecodestamper_init (GstTimeCodeStamper * timecodestamper)
{
timecodestamper->override_existing = DEFAULT_OVERRIDE_EXISTING;
timecodestamper->drop_frame = DEFAULT_DROP_FRAME;
timecodestamper->current_tc = gst_video_time_code_new_empty ();
timecodestamper->first_tc = NULL;
timecodestamper->current_tc->config.latest_daily_jam = DEFAULT_DAILY_JAM;
timecodestamper->post_messages = DEFAULT_POST_MESSAGES;
timecodestamper->first_tc_now = DEFAULT_FIRST_NOW;
}
static void
gst_timecodestamper_dispose (GObject * object)
{
GstTimeCodeStamper *timecodestamper = GST_TIME_CODE_STAMPER (object);
if (timecodestamper->current_tc != NULL) {
gst_video_time_code_free (timecodestamper->current_tc);
timecodestamper->current_tc = NULL;
}
if (timecodestamper->first_tc != NULL) {
gst_video_time_code_free (timecodestamper->first_tc);
timecodestamper->first_tc = NULL;
}
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);
switch (prop_id) {
case PROP_OVERRIDE_EXISTING:
timecodestamper->override_existing = g_value_get_boolean (value);
break;
case PROP_DROP_FRAME:
timecodestamper->drop_frame = g_value_get_boolean (value);
break;
case PROP_DAILY_JAM:
if (timecodestamper->current_tc->config.latest_daily_jam)
g_date_time_unref (timecodestamper->current_tc->
config.latest_daily_jam);
timecodestamper->current_tc->config.latest_daily_jam =
g_value_dup_boxed (value);
break;
case PROP_POST_MESSAGES:
timecodestamper->post_messages = g_value_get_boolean (value);
break;
case PROP_FIRST_TIMECODE:
if (timecodestamper->first_tc)
gst_video_time_code_free (timecodestamper->first_tc);
timecodestamper->first_tc = g_value_dup_boxed (value);
break;
case PROP_FIRST_NOW:
timecodestamper->first_tc_now = g_value_get_boolean (value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gst_timecodestamper_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec)
{
GstTimeCodeStamper *timecodestamper = GST_TIME_CODE_STAMPER (object);
switch (prop_id) {
case PROP_OVERRIDE_EXISTING:
g_value_set_boolean (value, timecodestamper->override_existing);
break;
case PROP_DROP_FRAME:
g_value_set_boolean (value, timecodestamper->drop_frame);
break;
case PROP_DAILY_JAM:
g_value_set_boxed (value,
timecodestamper->current_tc->config.latest_daily_jam);
break;
case PROP_POST_MESSAGES:
g_value_set_boolean (value, timecodestamper->post_messages);
break;
case PROP_FIRST_TIMECODE:
g_value_set_boxed (value, timecodestamper->first_tc);
break;
case PROP_FIRST_NOW:
g_value_set_boolean (value, timecodestamper->first_tc_now);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gst_timecodestamper_set_drop_frame (GstTimeCodeStamper * timecodestamper)
{
if (timecodestamper->drop_frame && timecodestamper->vinfo.fps_d == 1001 &&
(timecodestamper->vinfo.fps_n == 30000 ||
timecodestamper->vinfo.fps_n == 60000))
timecodestamper->current_tc->config.flags |=
GST_VIDEO_TIME_CODE_FLAGS_DROP_FRAME;
else
timecodestamper->current_tc->config.flags &=
~GST_VIDEO_TIME_CODE_FLAGS_DROP_FRAME;
}
static gboolean
gst_timecodestamper_stop (GstBaseTransform * trans)
{
GstTimeCodeStamper *timecodestamper = GST_TIME_CODE_STAMPER (trans);
gst_video_info_init (&timecodestamper->vinfo);
return TRUE;
}
/* Must be called with object lock */
static void
gst_timecodestamper_reset_timecode (GstTimeCodeStamper * timecodestamper)
{
GDateTime *jam = NULL;
if (timecodestamper->first_tc &&
timecodestamper->first_tc->config.latest_daily_jam)
jam = g_date_time_ref (timecodestamper->first_tc->config.latest_daily_jam);
else if (timecodestamper->current_tc->config.latest_daily_jam)
jam =
g_date_time_ref (timecodestamper->current_tc->config.latest_daily_jam);
gst_video_time_code_clear (timecodestamper->current_tc);
/* FIXME: What if the buffer doesn't contain both top and bottom fields? */
gst_video_time_code_init (timecodestamper->current_tc,
timecodestamper->vinfo.fps_n,
timecodestamper->vinfo.fps_d,
jam,
timecodestamper->vinfo.interlace_mode ==
GST_VIDEO_INTERLACE_MODE_PROGRESSIVE ? 0 :
GST_VIDEO_TIME_CODE_FLAGS_INTERLACED, 0, 0, 0, 0, 0);
if (jam)
g_date_time_unref (jam);
if (timecodestamper->first_tc) {
timecodestamper->current_tc->hours = timecodestamper->first_tc->hours;
timecodestamper->current_tc->minutes = timecodestamper->first_tc->minutes;
timecodestamper->current_tc->seconds = timecodestamper->first_tc->seconds;
timecodestamper->current_tc->frames = timecodestamper->first_tc->frames;
timecodestamper->current_tc->field_count =
timecodestamper->first_tc->field_count;
}
gst_timecodestamper_set_drop_frame (timecodestamper);
}
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;
guint64 frames;
gchar *tc_str;
gboolean notify = FALSE;
GST_OBJECT_LOCK (timecodestamper);
gst_event_copy_segment (event, &segment);
if (segment.format != GST_FORMAT_TIME) {
GST_OBJECT_UNLOCK (timecodestamper);
GST_ERROR_OBJECT (timecodestamper, "Invalid segment format");
return FALSE;
}
if (GST_VIDEO_INFO_FORMAT (&timecodestamper->vinfo) ==
GST_VIDEO_FORMAT_UNKNOWN) {
GST_ERROR_OBJECT (timecodestamper,
"Received segment event without caps");
GST_OBJECT_UNLOCK (timecodestamper);
return FALSE;
}
if (timecodestamper->first_tc_now && !timecodestamper->first_tc) {
GDateTime *dt = g_date_time_new_now_local ();
GstVideoTimeCode *tc;
gst_timecodestamper_set_drop_frame (timecodestamper);
tc = gst_video_time_code_new_from_date_time_full
(timecodestamper->vinfo.fps_n, timecodestamper->vinfo.fps_d, dt,
timecodestamper->current_tc->config.flags, 0);
g_date_time_unref (dt);
if (!tc) {
GST_ERROR_OBJECT (timecodestamper,
"Can't convert current time to a timecode");
GST_OBJECT_UNLOCK (timecodestamper);
return FALSE;
}
timecodestamper->first_tc = tc;
notify = TRUE;
}
frames =
gst_util_uint64_scale (segment.time, timecodestamper->vinfo.fps_n,
timecodestamper->vinfo.fps_d * GST_SECOND);
gst_timecodestamper_reset_timecode (timecodestamper);
gst_video_time_code_add_frames (timecodestamper->current_tc, frames);
GST_DEBUG_OBJECT (timecodestamper,
"Got %" G_GUINT64_FORMAT " frames when segment time is %"
GST_TIME_FORMAT, frames, GST_TIME_ARGS (segment.time));
tc_str = gst_video_time_code_to_string (timecodestamper->current_tc);
GST_DEBUG_OBJECT (timecodestamper, "New timecode is %s", tc_str);
g_free (tc_str);
GST_OBJECT_UNLOCK (timecodestamper);
if (notify)
g_object_notify (G_OBJECT (timecodestamper), "first-timecode");
break;
}
case GST_EVENT_CAPS:
{
GstCaps *caps;
GST_OBJECT_LOCK (timecodestamper);
gst_event_parse_caps (event, &caps);
if (!gst_video_info_from_caps (&timecodestamper->vinfo, caps)) {
GST_OBJECT_UNLOCK (timecodestamper);
return FALSE;
}
gst_timecodestamper_reset_timecode (timecodestamper);
GST_OBJECT_UNLOCK (timecodestamper);
break;
}
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);
GstVideoTimeCodeMeta *tc_meta;
GstVideoTimeCode *tc;
GST_OBJECT_LOCK (timecodestamper);
tc_meta = gst_buffer_get_video_time_code_meta (buffer);
if (tc_meta && !timecodestamper->override_existing) {
GST_OBJECT_UNLOCK (timecodestamper);
tc = gst_video_time_code_copy (&tc_meta->tc);
goto beach;
} else if (timecodestamper->override_existing) {
gst_buffer_foreach_meta (buffer, remove_timecode_meta, NULL);
}
gst_buffer_add_video_time_code_meta (buffer, timecodestamper->current_tc);
tc = gst_video_time_code_copy (timecodestamper->current_tc);
gst_video_time_code_increment_frame (timecodestamper->current_tc);
GST_OBJECT_UNLOCK (timecodestamper);
beach:
if (timecodestamper->post_messages) {
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);
}
gst_video_time_code_free (tc);
return GST_FLOW_OK;
}