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/* GStreamer
* Copyright (C) 2023 Seungha Yang <seungha@centricular.com>
*
* 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.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "gstdwriteclockoverlay.h"
#include <mutex>
#include <time.h>
GST_DEBUG_CATEGORY_STATIC (dwrite_clock_overlay_debug);
#define GST_CAT_DEFAULT dwrite_clock_overlay_debug
enum
{
PROP_0,
PROP_TIME_FORMAT,
};
#define DEFAULT_TIME_FORMAT "%H:%M:%S"
struct GstDWriteClockOverlayPrivate
{
std::mutex lock;
std::string format;
WString wformat;
};
struct _GstDWriteClockOverlay
{
GstDWriteBaseOverlay parent;
GstDWriteClockOverlayPrivate *priv;
};
static void gst_dwrite_clock_overlay_finalize (GObject * object);
static void gst_dwrite_clock_overlay_set_property (GObject * object,
guint prop_id, const GValue * value, GParamSpec * pspec);
static void gst_dwrite_clock_overlay_get_property (GObject * object,
guint prop_id, GValue * value, GParamSpec * pspec);
static WString
gst_dwrite_clock_overlay_get_text (GstDWriteBaseOverlay * overlay,
const WString & default_text, GstBuffer * buffer);
#define gst_dwrite_clock_overlay_parent_class parent_class
G_DEFINE_TYPE (GstDWriteClockOverlay, gst_dwrite_clock_overlay,
GST_TYPE_DWRITE_BASE_OVERLAY);
static void
gst_dwrite_clock_overlay_class_init (GstDWriteClockOverlayClass * klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
GstDWriteBaseOverlayClass *overlay_class =
GST_DWRITE_BASE_OVERLAY_CLASS (klass);
object_class->finalize = gst_dwrite_clock_overlay_finalize;
object_class->set_property = gst_dwrite_clock_overlay_set_property;
object_class->get_property = gst_dwrite_clock_overlay_get_property;
g_object_class_install_property (object_class, PROP_TIME_FORMAT,
g_param_spec_string ("time-format", "Date/Time Format",
"Format to use for time and date value, as in strftime.",
DEFAULT_TIME_FORMAT,
(GParamFlags) (G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)));
gst_element_class_set_static_metadata (element_class,
"DirectWrite Clock Overlay", "Filter/Editor/Video",
"Overlays the current clock time on a video stream",
"Seungha Yang <seungha@centricular.com>");
overlay_class->get_text =
GST_DEBUG_FUNCPTR (gst_dwrite_clock_overlay_get_text);
GST_DEBUG_CATEGORY_INIT (dwrite_clock_overlay_debug,
"dwriteclockoverlay", 0, "dwriteclockoverlay");
}
static void
gst_dwrite_clock_overlay_init (GstDWriteClockOverlay * self)
{
g_object_set (self, "text-alignment", DWRITE_TEXT_ALIGNMENT_LEADING,
"paragraph-alignment", DWRITE_PARAGRAPH_ALIGNMENT_NEAR, nullptr);
self->priv = new GstDWriteClockOverlayPrivate ();
self->priv->format = DEFAULT_TIME_FORMAT;
self->priv->wformat = gst_dwrite_string_to_wstring (DEFAULT_TIME_FORMAT);
}
static void
gst_dwrite_clock_overlay_finalize (GObject * object)
{
GstDWriteClockOverlay *self = GST_DWRITE_CLOCK_OVERLAY (object);
delete self->priv;
G_OBJECT_CLASS (parent_class)->finalize (object);
}
static void
gst_dwrite_clock_overlay_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec)
{
GstDWriteClockOverlay *self = GST_DWRITE_CLOCK_OVERLAY (object);
GstDWriteClockOverlayPrivate *priv = self->priv;
std::lock_guard < std::mutex > lk (priv->lock);
switch (prop_id) {
case PROP_TIME_FORMAT:
{
const gchar *format = g_value_get_string (value);
if (format)
priv->format = format;
else
priv->format = DEFAULT_TIME_FORMAT;
priv->wformat = gst_dwrite_string_to_wstring (priv->format);
break;
}
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gst_dwrite_clock_overlay_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec)
{
GstDWriteClockOverlay *self = GST_DWRITE_CLOCK_OVERLAY (object);
GstDWriteClockOverlayPrivate *priv = self->priv;
std::lock_guard < std::mutex > lk (priv->lock);
switch (prop_id) {
case PROP_TIME_FORMAT:
g_value_set_string (value, priv->format.c_str ());
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static WString
gst_dwrite_clock_overlay_render_time (GstDWriteClockOverlay * self)
{
GstDWriteClockOverlayPrivate *priv = self->priv;
struct tm *t;
time_t now;
wchar_t text[256];
now = time (nullptr);
t = localtime (&now);
if (!t)
return WString (L"--:--:--");
if (wcsftime (text, G_N_ELEMENTS (text), priv->wformat.c_str (), t) == 0)
return WString (L"--:--:--");
return WString (text);
}
static WString
gst_dwrite_clock_overlay_get_text (GstDWriteBaseOverlay * overlay,
const WString & default_text, GstBuffer * buffer)
{
GstDWriteClockOverlay *self = GST_DWRITE_CLOCK_OVERLAY (overlay);
WString time_str = gst_dwrite_clock_overlay_render_time (self);
if (default_text.empty ())
return time_str;
return default_text + WString (L" ") + time_str;
}
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