mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
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438 lines
15 KiB
C++
438 lines
15 KiB
C++
/* 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 "gstdwritetimeoverlay.h"
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#include <mutex>
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#include <strsafe.h>
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GST_DEBUG_CATEGORY_STATIC (dwrite_time_overlay_debug);
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#define GST_CAT_DEFAULT dwrite_time_overlay_debug
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typedef enum
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{
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GST_DWRITE_TIME_OVERLAY_TIME_LINE_BUFFER_TIME,
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GST_DWRITE_TIME_OVERLAY_TIME_LINE_STREAM_TIME,
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GST_DWRITE_TIME_OVERLAY_TIME_LINE_RUNNING_TIME,
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GST_DWRITE_TIME_OVERLAY_TIME_LINE_TIME_CODE,
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GST_DWRITE_TIME_OVERLAY_TIME_LINE_ELAPSED_RUNNING_TIME,
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GST_DWRITE_TIME_OVERLAY_TIME_LINE_REFERENCE_TIMESTAMP,
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GST_DWRITE_TIME_OVERLAY_TIME_LINE_BUFFER_COUNT,
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GST_DWRITE_TIME_OVERLAY_TIME_LINE_BUFFER_OFFSET,
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} GstDWriteTimeOverlayTimeLine;
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#define GST_TYPE_DWrite_TIME_OVERLAY_TIME_LINE (gst_dwrite_time_overlay_time_line_type ())
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static GType
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gst_dwrite_time_overlay_time_line_type (void)
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{
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static GType type;
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static const GEnumValue modes[] = {
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{GST_DWRITE_TIME_OVERLAY_TIME_LINE_BUFFER_TIME,
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"buffer-time", "buffer-time"},
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{GST_DWRITE_TIME_OVERLAY_TIME_LINE_STREAM_TIME,
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"stream-time", "stream-time"},
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{GST_DWRITE_TIME_OVERLAY_TIME_LINE_RUNNING_TIME,
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"running-time", "running-time"},
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{GST_DWRITE_TIME_OVERLAY_TIME_LINE_TIME_CODE, "time-code", "time-code"},
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{GST_DWRITE_TIME_OVERLAY_TIME_LINE_ELAPSED_RUNNING_TIME,
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"elapsed-running-time", "elapsed-running-time"},
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{GST_DWRITE_TIME_OVERLAY_TIME_LINE_REFERENCE_TIMESTAMP,
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"reference-timestamp", "reference-timestamp"},
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{GST_DWRITE_TIME_OVERLAY_TIME_LINE_BUFFER_COUNT,
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"buffer-count", "buffer-count"},
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{GST_DWRITE_TIME_OVERLAY_TIME_LINE_BUFFER_OFFSET,
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"buffer-offset", "buffer-offset"},
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{0, nullptr, nullptr},
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};
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GST_DWRITE_CALL_ONCE_BEGIN {
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type = g_enum_register_static ("GstDWriteTimeOverlayTimeLine", modes);
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} GST_DWRITE_CALL_ONCE_END;
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return type;
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}
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enum
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{
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PROP_0,
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PROP_TIME_LINE,
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PROP_SHOW_TIMES_AS_DATES,
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PROP_DATETIME_EPOCH,
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PROP_DATETIME_FORMAT,
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PROP_REFERENCE_TIMESTAMP_CAPS,
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};
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#define DEFAULT_TIME_LINE GST_DWRITE_TIME_OVERLAY_TIME_LINE_BUFFER_TIME
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#define DEFAULT_SHOW_TIMES_AS_DATES FALSE
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#define DEFAULT_DATETIME_FORMAT "%F %T" /* YYYY-MM-DD hh:mm:ss */
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static GstStaticCaps ntp_reference_timestamp_caps =
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GST_STATIC_CAPS ("timestamp/x-ntp");
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struct GstDWriteTimeOverlayPrivate
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{
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GstDWriteTimeOverlayPrivate ()
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{
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datetime_epoch = g_date_time_new_utc (1900, 1, 1, 0, 0, 0);
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reference_timestamp_caps =
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gst_static_caps_get (&ntp_reference_timestamp_caps);
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}
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~GstDWriteTimeOverlayPrivate ()
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{
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if (datetime_epoch)
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g_date_time_unref (datetime_epoch);
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gst_clear_caps (&reference_timestamp_caps);
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}
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std::mutex lock;
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GstDWriteTimeOverlayTimeLine time_line = DEFAULT_TIME_LINE;
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gboolean show_times_as_dates = DEFAULT_SHOW_TIMES_AS_DATES;
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guint64 buffer_count = 0;
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std::string datetime_format = DEFAULT_DATETIME_FORMAT;
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GDateTime *datetime_epoch;
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GstCaps *reference_timestamp_caps;
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GstClockTime first_running_time = GST_CLOCK_TIME_NONE;
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};
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struct _GstDWriteTimeOverlay
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{
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GstDWriteBaseOverlay parent;
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GstDWriteTimeOverlayPrivate *priv;
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};
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static void gst_dwrite_time_overlay_finalize (GObject * object);
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static void gst_dwrite_time_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_time_overlay_get_property (GObject * object,
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guint prop_id, GValue * value, GParamSpec * pspec);
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static gboolean gst_dwrite_time_overlay_sink_event (GstBaseTransform * trans,
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GstEvent * event);
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static gboolean gst_dwrite_time_overlay_start (GstBaseTransform * overlay);
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static WString gst_dwrite_time_overlay_get_text (GstDWriteBaseOverlay * overlay,
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const WString & default_text, GstBuffer * buffer);
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#define gst_dwrite_time_overlay_parent_class parent_class
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G_DEFINE_TYPE (GstDWriteTimeOverlay, gst_dwrite_time_overlay,
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GST_TYPE_DWRITE_BASE_OVERLAY);
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static void
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gst_dwrite_time_overlay_class_init (GstDWriteTimeOverlayClass * 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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GstBaseTransformClass *trans_class = GST_BASE_TRANSFORM_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_time_overlay_finalize;
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object_class->set_property = gst_dwrite_time_overlay_set_property;
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object_class->get_property = gst_dwrite_time_overlay_get_property;
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g_object_class_install_property (object_class, PROP_TIME_LINE,
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g_param_spec_enum ("time-mode", "Time Mode", "What time to show",
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GST_TYPE_DWrite_TIME_OVERLAY_TIME_LINE, DEFAULT_TIME_LINE,
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(GParamFlags) (G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)));
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g_object_class_install_property (object_class, PROP_DATETIME_EPOCH,
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g_param_spec_boxed ("datetime-epoch", "Datetime Epoch",
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"When showing times as dates, the initial date from which time "
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"is counted, if not specified prime epoch is used (1900-01-01)",
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G_TYPE_DATE_TIME,
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(GParamFlags) (G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)));
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g_object_class_install_property (object_class, PROP_DATETIME_FORMAT,
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g_param_spec_string ("datetime-format", "Datetime Format",
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"When showing times as dates, the format to render date and time in",
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DEFAULT_DATETIME_FORMAT,
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(GParamFlags) (G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)));
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g_object_class_install_property (object_class, PROP_SHOW_TIMES_AS_DATES,
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g_param_spec_boolean ("show-times-as-dates", "Show times as dates",
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"Whether to display times, counted from datetime-epoch, as dates",
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DEFAULT_SHOW_TIMES_AS_DATES,
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(GParamFlags) (G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)));
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g_object_class_install_property (object_class, PROP_REFERENCE_TIMESTAMP_CAPS,
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g_param_spec_boxed ("reference-timestamp-caps",
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"Reference Timestamp Caps",
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"Caps to use for the reference timestamp time mode",
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GST_TYPE_CAPS,
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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 Time Overlay", "Filter/Editor/Video",
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"Overlays buffer time stamps on a video stream",
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"Seungha Yang <seungha@centricular.com>");
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trans_class->sink_event =
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GST_DEBUG_FUNCPTR (gst_dwrite_time_overlay_sink_event);
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trans_class->start = GST_DEBUG_FUNCPTR (gst_dwrite_time_overlay_start);
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overlay_class->get_text =
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GST_DEBUG_FUNCPTR (gst_dwrite_time_overlay_get_text);
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GST_DEBUG_CATEGORY_INIT (dwrite_time_overlay_debug,
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"dwritetimeoverlay", 0, "dwritetimeoverlay");
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gst_type_mark_as_plugin_api (GST_TYPE_DWrite_TIME_OVERLAY_TIME_LINE,
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(GstPluginAPIFlags) 0);
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}
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static void
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gst_dwrite_time_overlay_init (GstDWriteTimeOverlay * 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 GstDWriteTimeOverlayPrivate ();
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}
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static void
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gst_dwrite_time_overlay_finalize (GObject * object)
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{
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GstDWriteTimeOverlay *self = GST_DWRITE_TIME_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_time_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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GstDWriteTimeOverlay *self = GST_DWRITE_TIME_OVERLAY (object);
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GstDWriteTimeOverlayPrivate *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_LINE:
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priv->time_line = (GstDWriteTimeOverlayTimeLine) g_value_get_enum (value);
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break;
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case PROP_SHOW_TIMES_AS_DATES:
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priv->show_times_as_dates = g_value_get_boolean (value);
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break;
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case PROP_DATETIME_EPOCH:
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g_date_time_unref (priv->datetime_epoch);
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priv->datetime_epoch = (GDateTime *) g_value_dup_boxed (value);
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break;
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case PROP_DATETIME_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->datetime_format = format;
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else
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priv->datetime_format = DEFAULT_DATETIME_FORMAT;
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break;
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}
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case PROP_REFERENCE_TIMESTAMP_CAPS:
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gst_clear_caps (&priv->reference_timestamp_caps);
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priv->reference_timestamp_caps = (GstCaps *) g_value_dup_boxed (value);
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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 void
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gst_dwrite_time_overlay_get_property (GObject * object, guint prop_id,
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GValue * value, GParamSpec * pspec)
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{
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GstDWriteTimeOverlay *self = GST_DWRITE_TIME_OVERLAY (object);
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GstDWriteTimeOverlayPrivate *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_LINE:
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g_value_set_enum (value, priv->time_line);
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break;
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case PROP_SHOW_TIMES_AS_DATES:
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g_value_set_boolean (value, priv->show_times_as_dates);
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break;
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case PROP_DATETIME_EPOCH:
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g_value_set_boxed (value, priv->datetime_epoch);
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break;
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case PROP_DATETIME_FORMAT:
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g_value_set_string (value, priv->datetime_format.c_str ());
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break;
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case PROP_REFERENCE_TIMESTAMP_CAPS:
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g_value_set_boxed (value, priv->reference_timestamp_caps);
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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 gboolean
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gst_dwrite_time_overlay_start (GstBaseTransform * trans)
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{
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GstDWriteTimeOverlay *self = GST_DWRITE_TIME_OVERLAY (trans);
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GstDWriteTimeOverlayPrivate *priv = self->priv;
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priv->first_running_time = GST_CLOCK_TIME_NONE;
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priv->buffer_count = 0;
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return GST_BASE_TRANSFORM_CLASS (parent_class)->start (trans);
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}
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static gboolean
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gst_dwrite_time_overlay_sink_event (GstBaseTransform * trans, GstEvent * event)
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{
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GstDWriteTimeOverlay *self = GST_DWRITE_TIME_OVERLAY (trans);
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GstDWriteTimeOverlayPrivate *priv = self->priv;
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switch (GST_EVENT_TYPE (event)) {
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case GST_EVENT_FLUSH_STOP:
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priv->first_running_time = GST_CLOCK_TIME_NONE;
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break;
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default:
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break;
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}
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return GST_BASE_TRANSFORM_CLASS (parent_class)->sink_event (trans, event);
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}
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static WString
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gst_dwrite_time_overlay_render_time (GstDWriteTimeOverlay * self,
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GstClockTime time)
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{
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wchar_t text[256];
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HRESULT hr;
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guint h, m, s, ms;
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if (!GST_CLOCK_TIME_IS_VALID (time))
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return WString ();
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h = (guint) (time / (GST_SECOND * 60 * 60));
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m = (guint) ((time / (GST_SECOND * 60)) % 60);
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s = (guint) ((time / GST_SECOND) % 60);
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ms = (guint) ((time % GST_SECOND) / (1000 * 1000));
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hr = StringCbPrintfW (text, sizeof (text), L"%u:%02u:%02u.%03u", h, m, s, ms);
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if (FAILED (hr))
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return WString ();
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return WString (text);
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}
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static WString
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gst_dwrite_time_overlay_get_text (GstDWriteBaseOverlay * overlay,
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const WString & default_text, GstBuffer * buffer)
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{
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GstDWriteTimeOverlay *self = GST_DWRITE_TIME_OVERLAY (overlay);
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GstDWriteTimeOverlayPrivate *priv = self->priv;
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WString time_str;
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WString ret;
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std::lock_guard < std::mutex > lk (priv->lock);
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gboolean show_buffer_count = FALSE;
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if (priv->time_line == GST_DWRITE_TIME_OVERLAY_TIME_LINE_TIME_CODE) {
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GstVideoTimeCodeMeta *tc_meta =
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gst_buffer_get_video_time_code_meta (buffer);
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if (!tc_meta) {
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GST_DEBUG_OBJECT (self, "buffer without valid timecode");
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time_str = L"00:00:00:00";
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} else {
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gchar *str = gst_video_time_code_to_string (&tc_meta->tc);
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GST_DEBUG_OBJECT (self, "buffer with timecode %s", str);
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time_str = gst_dwrite_string_to_wstring (str);
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g_free (str);
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}
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} else {
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GstBaseTransform *trans = GST_BASE_TRANSFORM (overlay);
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GstClockTime ts, ts_buffer;
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GstSegment *seg = &trans->segment;
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ts = ts_buffer = GST_BUFFER_TIMESTAMP (buffer);
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if (GST_CLOCK_TIME_IS_VALID (ts)) {
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switch (priv->time_line) {
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case GST_DWRITE_TIME_OVERLAY_TIME_LINE_STREAM_TIME:
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ts = gst_segment_to_stream_time (seg, GST_FORMAT_TIME, ts_buffer);
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break;
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case GST_DWRITE_TIME_OVERLAY_TIME_LINE_RUNNING_TIME:
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ts = gst_segment_to_running_time (seg, GST_FORMAT_TIME, ts_buffer);
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break;
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case GST_DWRITE_TIME_OVERLAY_TIME_LINE_ELAPSED_RUNNING_TIME:
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ts = gst_segment_to_running_time (seg, GST_FORMAT_TIME, ts_buffer);
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if (!GST_CLOCK_TIME_IS_VALID (priv->first_running_time))
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priv->first_running_time = ts;
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ts -= priv->first_running_time;
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break;
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case GST_DWRITE_TIME_OVERLAY_TIME_LINE_REFERENCE_TIMESTAMP:
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{
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GstReferenceTimestampMeta *meta;
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if (priv->reference_timestamp_caps) {
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meta = gst_buffer_get_reference_timestamp_meta (buffer,
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priv->reference_timestamp_caps);
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if (meta)
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ts = meta->timestamp;
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else
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ts = 0;
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} else {
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ts = 0;
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}
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break;
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}
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case GST_DWRITE_TIME_OVERLAY_TIME_LINE_BUFFER_COUNT:
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show_buffer_count = TRUE;
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priv->buffer_count++;
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break;
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case GST_DWRITE_TIME_OVERLAY_TIME_LINE_BUFFER_OFFSET:
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show_buffer_count = TRUE;
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ts = gst_segment_to_running_time (seg, GST_FORMAT_TIME, ts_buffer);
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priv->buffer_count = gst_util_uint64_scale (ts, overlay->info.fps_n,
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overlay->info.fps_d * GST_SECOND);
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break;
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case GST_DWRITE_TIME_OVERLAY_TIME_LINE_BUFFER_TIME:
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default:
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ts = ts_buffer;
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break;
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}
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if (show_buffer_count) {
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time_str = std::to_wstring (priv->buffer_count);
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} else if (priv->show_times_as_dates) {
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GDateTime *datetime;
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gchar *str;
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datetime =
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g_date_time_add_seconds (priv->datetime_epoch,
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((gdouble) ts) / GST_SECOND);
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str = g_date_time_format (datetime, priv->datetime_format.c_str ());
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time_str = gst_dwrite_string_to_wstring (str);
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g_free (str);
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g_date_time_unref (datetime);
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} else {
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time_str = gst_dwrite_time_overlay_render_time (self, ts);
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}
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}
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}
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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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