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timeoverlay: add a property to show times as dates

Browse source 
In this mode, buffer timestamps are displayed as an absolute date
since a user-specifiable epoch. The format is also specifiable as
a string property, that will be passed to g_date_time_format().
This commit is contained in:
Mathieu Duponchelle 2019-07-10 14:00:56 +02:00 committed by Mathieu Duponchelle
parent 355736fc93
commit 72eb7c6a74
2 changed files with 75 additions and 3 deletions
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71
ext/pango/gsttimeoverlay.c
View file

@ -53,11 +53,16 @@
#include "gsttimeoverlay.h"
#define DEFAULT_TIME_LINE GST_TIME_OVERLAY_TIME_LINE_BUFFER_TIME
#define DEFAULT_SHOW_TIMES_AS_DATES FALSE
#define DEFAULT_DATETIME_FORMAT "%F %T" /* YYYY-MM-DD hh:mm:ss */
enum
{
PROP_0,
PROP_TIME_LINE
PROP_TIME_LINE,
PROP_SHOW_TIMES_AS_DATES,
PROP_DATETIME_EPOCH,
PROP_DATETIME_FORMAT,
};
#define gst_time_overlay_parent_class parent_class
@ -108,6 +113,7 @@ static gchar *
gst_time_overlay_get_text (GstBaseTextOverlay * overlay,
GstBuffer * video_frame)
{
GstTimeOverlay *self = GST_TIME_OVERLAY (overlay);
GstTimeOverlayTimeLine time_line;
gchar *time_str, *txt, *ret;
@ -150,8 +156,19 @@ gst_time_overlay_get_text (GstBaseTextOverlay * overlay,
break;
}
time_str = gst_time_overlay_render_time (GST_TIME_OVERLAY (overlay), ts);
if (self->show_times_as_dates) {
GDateTime *datetime;
datetime =
g_date_time_add_seconds (self->datetime_epoch,
(gdouble) GST_BUFFER_TIMESTAMP (video_frame) / GST_SECOND);
time_str = g_date_time_format (datetime, self->datetime_format);
g_date_time_unref (datetime);
} else {
time_str = gst_time_overlay_render_time (GST_TIME_OVERLAY (overlay), ts);
}
}
txt = g_strdup (overlay->default_text);
if (txt != NULL && *txt != '\0') {
@ -167,6 +184,15 @@ gst_time_overlay_get_text (GstBaseTextOverlay * overlay,
return ret;
}
static void
gst_time_overlay_finalize (GObject * gobject)
{
GstTimeOverlay *self = GST_TIME_OVERLAY (gobject);
g_date_time_unref (self->datetime_epoch);
g_free (self->datetime_format);
}
static void
gst_time_overlay_class_init (GstTimeOverlayClass * klass)
{
@ -185,6 +211,7 @@ gst_time_overlay_class_init (GstTimeOverlayClass * klass)
gsttextoverlay_class->get_text = gst_time_overlay_get_text;
gobject_class->finalize = gst_time_overlay_finalize;
gobject_class->set_property = gst_time_overlay_set_property;
gobject_class->get_property = gst_time_overlay_get_property;
@ -192,6 +219,23 @@ gst_time_overlay_class_init (GstTimeOverlayClass * klass)
g_param_spec_enum ("time-mode", "Time Mode", "What time to show",
GST_TYPE_TIME_OVERLAY_TIME_LINE, DEFAULT_TIME_LINE,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_DATETIME_EPOCH,
g_param_spec_boxed ("datetime-epoch", "Datetime Epoch",
"When showing times as dates, the initial date from which time "
"is counted, if not specified prime epoch is used (1900-01-01)",
G_TYPE_DATE_TIME, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_DATETIME_FORMAT,
g_param_spec_string ("datetime-format", "Datetime Format",
"When showing times as dates, the format to render date and time in",
DEFAULT_DATETIME_FORMAT, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_SHOW_TIMES_AS_DATES,
g_param_spec_boolean ("show-times-as-dates", "Show times as dates",
"Whether to display times, counted from datetime-epoch, as dates",
DEFAULT_SHOW_TIMES_AS_DATES,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
}
static void
@ -207,6 +251,9 @@ gst_time_overlay_init (GstTimeOverlay * overlay)
textoverlay->halign = GST_BASE_TEXT_OVERLAY_HALIGN_LEFT;
overlay->time_line = DEFAULT_TIME_LINE;
overlay->show_times_as_dates = DEFAULT_SHOW_TIMES_AS_DATES;
overlay->datetime_epoch = g_date_time_new_utc (1900, 1, 1, 0, 0, 0);
overlay->datetime_format = g_strdup (DEFAULT_DATETIME_FORMAT);
context = textoverlay->pango_context;
@ -234,6 +281,17 @@ gst_time_overlay_set_property (GObject * object, guint prop_id,
case PROP_TIME_LINE:
g_atomic_int_set (&overlay->time_line, g_value_get_enum (value));
break;
case PROP_SHOW_TIMES_AS_DATES:
overlay->show_times_as_dates = g_value_get_boolean (value);
break;
case PROP_DATETIME_EPOCH:
g_date_time_unref (overlay->datetime_epoch);
overlay->datetime_epoch = (GDateTime *) g_value_dup_boxed (value);
break;
case PROP_DATETIME_FORMAT:
g_free (overlay->datetime_format);
overlay->datetime_format = g_value_dup_string (value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
@ -250,6 +308,15 @@ gst_time_overlay_get_property (GObject * object, guint prop_id,
case PROP_TIME_LINE:
g_value_set_enum (value, g_atomic_int_get (&overlay->time_line));
break;
case PROP_SHOW_TIMES_AS_DATES:
g_value_set_boolean (value, overlay->show_times_as_dates);
break;
case PROP_DATETIME_EPOCH:
g_value_set_boxed (value, overlay->datetime_epoch);
break;
case PROP_DATETIME_FORMAT:
g_value_set_string (value, overlay->datetime_format);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;

7
ext/pango/gsttimeoverlay.h
View file

@ -45,7 +45,7 @@ typedef enum {
GST_TIME_OVERLAY_TIME_LINE_BUFFER_TIME,
GST_TIME_OVERLAY_TIME_LINE_STREAM_TIME,
GST_TIME_OVERLAY_TIME_LINE_RUNNING_TIME,
GST_TIME_OVERLAY_TIME_LINE_TIME_CODE
GST_TIME_OVERLAY_TIME_LINE_TIME_CODE,
} GstTimeOverlayTimeLine;
/**
@ -58,6 +58,11 @@ struct _GstTimeOverlay {
/*< private >*/
GstTimeOverlayTimeLine time_line;
/* For datetime mode */
gboolean show_times_as_dates;
gchar *datetime_format;
GDateTime *datetime_epoch;
};
struct _GstTimeOverlayClass {