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https://gitlab.freedesktop.org/gstreamer/gstreamer.git
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307 lines
8.1 KiB
C
307 lines
8.1 KiB
C
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/* GStreamer
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* Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
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* Copyright (C) <2003> David Schleef <ds@schleef.org>
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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., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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/*
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* This file was (probably) generated from gsttimeoverlay.c,
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* gsttimeoverlay.c,v 1.7 2003/11/08 02:48:59 dschleef Exp
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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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/*#define DEBUG_ENABLED */
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#include <gsttimeoverlay.h>
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#include <string.h>
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#include <math.h>
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#include <cairo.h>
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/* GstTimeoverlay signals and args */
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enum
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{
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/* FILL ME */
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LAST_SIGNAL
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};
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enum
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{
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ARG_0
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/* FILL ME */
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};
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static void gst_timeoverlay_base_init (gpointer g_class);
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static void gst_timeoverlay_class_init (gpointer g_class, gpointer class_data);
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static void gst_timeoverlay_init (GTypeInstance * instance, gpointer g_class);
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static void gst_timeoverlay_set_property (GObject * object, guint prop_id,
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const GValue * value, GParamSpec * pspec);
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static void gst_timeoverlay_get_property (GObject * object, guint prop_id,
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GValue * value, GParamSpec * pspec);
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static void gst_timeoverlay_planar411 (GstVideofilter * videofilter, void *dest,
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void *src);
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static void gst_timeoverlay_setup (GstVideofilter * videofilter);
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GType
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gst_timeoverlay_get_type (void)
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{
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static GType timeoverlay_type = 0;
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if (!timeoverlay_type) {
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static const GTypeInfo timeoverlay_info = {
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sizeof (GstTimeoverlayClass),
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gst_timeoverlay_base_init,
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NULL,
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gst_timeoverlay_class_init,
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NULL,
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NULL,
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sizeof (GstTimeoverlay),
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0,
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gst_timeoverlay_init,
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};
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timeoverlay_type = g_type_register_static (GST_TYPE_VIDEOFILTER,
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"GstTimeoverlay", &timeoverlay_info, 0);
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}
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return timeoverlay_type;
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}
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static GstVideofilterFormat gst_timeoverlay_formats[] = {
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{"I420", 12, gst_timeoverlay_planar411,},
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};
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static void
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gst_timeoverlay_base_init (gpointer g_class)
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{
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static GstElementDetails timeoverlay_details =
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GST_ELEMENT_DETAILS ("Time Overlay",
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"Filter/Editor/Video",
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"Overlays the time on a video stream",
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"David Schleef <ds@schleef.org>");
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GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
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GstVideofilterClass *videofilter_class = GST_VIDEOFILTER_CLASS (g_class);
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int i;
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gst_element_class_set_details (element_class, &timeoverlay_details);
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for (i = 0; i < G_N_ELEMENTS (gst_timeoverlay_formats); i++) {
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gst_videofilter_class_add_format (videofilter_class,
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gst_timeoverlay_formats + i);
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}
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gst_videofilter_class_add_pad_templates (GST_VIDEOFILTER_CLASS (g_class));
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}
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static void
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gst_timeoverlay_class_init (gpointer g_class, gpointer class_data)
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{
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GObjectClass *gobject_class;
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GstVideofilterClass *videofilter_class;
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gobject_class = G_OBJECT_CLASS (g_class);
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videofilter_class = GST_VIDEOFILTER_CLASS (g_class);
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#if 0
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g_object_class_install_property (gobject_class, ARG_METHOD,
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g_param_spec_enum ("method", "method", "method",
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GST_TYPE_TIMEOVERLAY_METHOD, GST_TIMEOVERLAY_METHOD_1,
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G_PARAM_READWRITE));
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#endif
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gobject_class->set_property = gst_timeoverlay_set_property;
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gobject_class->get_property = gst_timeoverlay_get_property;
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videofilter_class->setup = gst_timeoverlay_setup;
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}
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static void
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gst_timeoverlay_init (GTypeInstance * instance, gpointer g_class)
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{
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GstTimeoverlay *timeoverlay = GST_TIMEOVERLAY (instance);
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GstVideofilter *videofilter;
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GST_DEBUG ("gst_timeoverlay_init");
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videofilter = GST_VIDEOFILTER (timeoverlay);
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/* do stuff */
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}
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static void
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gst_timeoverlay_set_property (GObject * object, guint prop_id,
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const GValue * value, GParamSpec * pspec)
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{
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GstTimeoverlay *src;
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/* it's not null if we got it, but it might not be ours */
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g_return_if_fail (GST_IS_TIMEOVERLAY (object));
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src = GST_TIMEOVERLAY (object);
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GST_DEBUG ("gst_timeoverlay_set_property");
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switch (prop_id) {
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#if 0
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case ARG_METHOD:
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src->method = g_value_get_enum (value);
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break;
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#endif
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default:
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break;
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}
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}
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static void
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gst_timeoverlay_get_property (GObject * object, guint prop_id, GValue * value,
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GParamSpec * pspec)
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{
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GstTimeoverlay *src;
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/* it's not null if we got it, but it might not be ours */
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g_return_if_fail (GST_IS_TIMEOVERLAY (object));
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src = GST_TIMEOVERLAY (object);
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switch (prop_id) {
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#if 0
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case ARG_METHOD:
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g_value_set_enum (value, src->method);
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break;
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#endif
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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_timeoverlay_setup (GstVideofilter * videofilter)
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{
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GstTimeoverlay *timeoverlay;
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cairo_font_extents_t font_extents;
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g_return_if_fail (GST_IS_TIMEOVERLAY (videofilter));
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timeoverlay = GST_TIMEOVERLAY (videofilter);
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/* if any setup needs to be done, do it here */
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timeoverlay->cr = cairo_create ();
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cairo_set_rgb_color (timeoverlay->cr, 0, 0, 0);
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cairo_select_font (timeoverlay->cr, "monospace", 0, 0);
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cairo_scale_font (timeoverlay->cr, 20);
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cairo_current_font_extents (timeoverlay->cr, &font_extents);
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timeoverlay->text_height = font_extents.height;
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}
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static char *
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gst_timeoverlay_print_smpte_time (guint64 time)
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{
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int hours;
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int minutes;
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int seconds;
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int ms;
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double x;
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x = rint ((time + 500000) * 1e-6);
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hours = floor (x / (60 * 60 * 1000));
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x -= hours * 60 * 60 * 1000;
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minutes = floor (x / (60 * 1000));
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x -= minutes * 60 * 1000;
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seconds = floor (x / (1000));
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x -= seconds * 1000;
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ms = rint (x);
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return g_strdup_printf ("%02d:%02d:%02d.%03d", hours, minutes, seconds, ms);
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}
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static void
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gst_timeoverlay_planar411 (GstVideofilter * videofilter, void *dest, void *src)
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{
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GstTimeoverlay *timeoverlay;
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int width;
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int height;
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int b_width;
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char *string;
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int i, j;
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uint8_t *image;
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cairo_text_extents_t extents;
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g_return_if_fail (GST_IS_TIMEOVERLAY (videofilter));
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timeoverlay = GST_TIMEOVERLAY (videofilter);
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width = gst_videofilter_get_input_width (videofilter);
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height = gst_videofilter_get_input_height (videofilter);
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string =
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gst_timeoverlay_print_smpte_time (GST_BUFFER_TIMESTAMP (videofilter->
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in_buf));
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image = g_malloc (4 * width * timeoverlay->text_height);
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cairo_set_target_image (timeoverlay->cr, image, CAIRO_FORMAT_ARGB32,
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width, timeoverlay->text_height, width * 4);
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cairo_save (timeoverlay->cr);
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cairo_rectangle (timeoverlay->cr, 0, 0, width, timeoverlay->text_height);
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cairo_set_alpha (timeoverlay->cr, 0);
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cairo_set_operator (timeoverlay->cr, CAIRO_OPERATOR_SRC);
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cairo_fill (timeoverlay->cr);
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cairo_restore (timeoverlay->cr);
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cairo_save (timeoverlay->cr);
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cairo_text_extents (timeoverlay->cr, string, &extents);
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cairo_set_rgb_color (timeoverlay->cr, 1, 1, 1);
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cairo_move_to (timeoverlay->cr, 0, timeoverlay->text_height - 2);
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cairo_show_text (timeoverlay->cr, string);
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g_free (string);
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#if 0
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cairo_text_path (timeoverlay->cr, string);
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cairo_set_rgb_color (timeoverlay->cr, 1, 1, 1);
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cairo_set_line_width (timeoverlay->cr, 1.0);
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cairo_stroke (timeoverlay->cr);
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#endif
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cairo_restore (timeoverlay->cr);
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b_width = extents.width;
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if (b_width > width)
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b_width = width;
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memcpy (dest, src, videofilter->from_buf_size);
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for (i = 0; i < timeoverlay->text_height; i++) {
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for (j = 0; j < b_width; j++) {
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((uint8_t *) dest)[i * width + j] = image[(i * width + j) * 4 + 0];
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}
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}
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for (i = 0; i < timeoverlay->text_height / 2; i++) {
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memset (dest + width * height + i * (width / 2), 128, b_width / 2);
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memset (dest + width * height + (width / 2) * (height / 2) +
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i * (width / 2), 128, b_width / 2);
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}
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g_free (image);
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}
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