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-rw-r--r--ext/pango/gsttimeoverlay.c151
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diff --git a/ext/pango/gsttimeoverlay.c b/ext/pango/gsttimeoverlay.c
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--- a/ext/pango/gsttimeoverlay.c
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-/* GStreamer
- * Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
- * Copyright (C) <2005> Tim-Philipp Müller <tim@centricular.net>
- *
- * 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., 59 Temple Place - Suite 330,
- * Boston, MA 02111-1307, USA.
- */
-
-/**
- * SECTION:element-timeoverlay
- * @see_also: #GstTextOverlay, #GstClockOverlay
- *
- * This element overlays the buffer time stamps of a video stream on
- * top of itself. You can position the text and configure the font details
- * using the properties of the #GstTextOverlay class. By default, the
- * time stamp is displayed in the top left corner of the picture, with some
- * padding to the left and to the top.
- *
- * <refsect2>
- * |[
- * gst-launch -v videotestsrc ! timeoverlay ! xvimagesink
- * ]| Display the time stamps in the top left
- * corner of the video picture.
- * |[
- * gst-launch -v videotestsrc ! timeoverlay halign=right valign=bottom text="Stream time:" shaded-background=true ! xvimagesink
- * ]| Another pipeline that displays the time stamps with some leading
- * text in the bottom right corner of the video picture, with the background
- * of the text being shaded in order to make it more legible on top of a
- * bright video background.
- * </refsect2>
- */
-
-#ifdef HAVE_CONFIG_H
-#include "config.h"
-#endif
-
-#include <gst/video/video.h>
-
-#include <gsttimeoverlay.h>
-
-GST_BOILERPLATE (GstTimeOverlay, gst_time_overlay, GstTextOverlay,
- GST_TYPE_TEXT_OVERLAY);
-
-static void
-gst_time_overlay_base_init (gpointer g_class)
-{
- GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
-
- gst_element_class_set_details_simple (element_class, "Time overlay",
- "Filter/Editor/Video",
- "Overlays buffer time stamps on a video stream",
- "Tim-Philipp Müller <tim@centricular.net>");
-}
-
-static gchar *
-gst_time_overlay_render_time (GstTimeOverlay * overlay, GstClockTime time)
-{
- guint hours, mins, secs, msecs;
-
- if (!GST_CLOCK_TIME_IS_VALID (time))
- return g_strdup ("");
-
- hours = (guint) (time / (GST_SECOND * 60 * 60));
- mins = (guint) ((time / (GST_SECOND * 60)) % 60);
- secs = (guint) ((time / GST_SECOND) % 60);
- msecs = (guint) ((time % GST_SECOND) / (1000 * 1000));
-
- return g_strdup_printf ("%u:%02u:%02u.%03u", hours, mins, secs, msecs);
-}
-
-/* Called with lock held */
-static gchar *
-gst_time_overlay_get_text (GstTextOverlay * overlay, GstBuffer * video_frame)
-{
- GstClockTime time = GST_BUFFER_TIMESTAMP (video_frame);
- gchar *time_str, *txt, *ret;
-
- overlay->need_render = TRUE;
-
- if (!GST_CLOCK_TIME_IS_VALID (time)) {
- GST_DEBUG ("buffer without valid timestamp");
- return g_strdup ("");
- }
-
- GST_DEBUG ("buffer with timestamp %" GST_TIME_FORMAT, GST_TIME_ARGS (time));
-
- txt = g_strdup (overlay->default_text);
-
- time_str = gst_time_overlay_render_time (GST_TIME_OVERLAY (overlay), time);
- if (txt != NULL && *txt != '\0') {
- ret = g_strdup_printf ("%s %s", txt, time_str);
- } else {
- ret = time_str;
- time_str = NULL;
- }
-
- g_free (txt);
- g_free (time_str);
-
- return ret;
-}
-
-static void
-gst_time_overlay_class_init (GstTimeOverlayClass * klass)
-{
- GstTextOverlayClass *gsttextoverlay_class;
-
- gsttextoverlay_class = (GstTextOverlayClass *) klass;
-
- gsttextoverlay_class->get_text = gst_time_overlay_get_text;
-}
-
-static void
-gst_time_overlay_init (GstTimeOverlay * overlay, GstTimeOverlayClass * klass)
-{
- PangoFontDescription *font_description;
- GstTextOverlay *textoverlay;
- PangoContext *context;
-
- textoverlay = GST_TEXT_OVERLAY (overlay);
-
- context = GST_TEXT_OVERLAY_CLASS (klass)->pango_context;
-
- pango_context_set_language (context, pango_language_from_string ("en_US"));
- pango_context_set_base_dir (context, PANGO_DIRECTION_LTR);
-
- font_description = pango_font_description_new ();
- pango_font_description_set_family_static (font_description, "Monospace");
- pango_font_description_set_style (font_description, PANGO_STYLE_NORMAL);
- pango_font_description_set_variant (font_description, PANGO_VARIANT_NORMAL);
- pango_font_description_set_weight (font_description, PANGO_WEIGHT_NORMAL);
- pango_font_description_set_stretch (font_description, PANGO_STRETCH_NORMAL);
- pango_font_description_set_size (font_description, 18 * PANGO_SCALE);
- pango_context_set_font_description (context, font_description);
- pango_font_description_free (font_description);
-
- textoverlay->valign = GST_TEXT_OVERLAY_VALIGN_TOP;
- textoverlay->halign = GST_TEXT_OVERLAY_HALIGN_LEFT;
-}