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