/* GStreamer * Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu> * Copyright (C) <2003> David Schleef <ds@schleef.org> * * 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. */ /* portions derived from: * Pango * pangoft2topgm.c: Example program to view a UTF-8 encoding file * using Pango to render result. * * Copyright (C) 1999 Red Hat Software * Copyright (C) 2001 Sun Microsystems */ /* * This file was (probably) generated from gsttimeoverlay.c, * gsttimeoverlay.c,v 1.7 2003/11/08 02:48:59 dschleef Exp */ #ifdef HAVE_CONFIG_H #include "config.h" #endif /*#define DEBUG_ENABLED */ #include <gsttimeoverlay.h> #include <string.h> #include <math.h> #include <pango/pango.h> #include <pango/pangoft2.h> /* GstTimeoverlay signals and args */ enum { /* FILL ME */ LAST_SIGNAL }; enum { ARG_0, /* FILL ME */ }; static void gst_timeoverlay_base_init (gpointer g_class); static void gst_timeoverlay_class_init (gpointer g_class, gpointer class_data); static void gst_timeoverlay_init (GTypeInstance * instance, gpointer g_class); static void gst_timeoverlay_set_property (GObject * object, guint prop_id, const GValue * value, GParamSpec * pspec); static void gst_timeoverlay_get_property (GObject * object, guint prop_id, GValue * value, GParamSpec * pspec); static void gst_timeoverlay_planar411 (GstVideofilter * videofilter, void *dest, void *src); static void gst_timeoverlay_setup (GstVideofilter * videofilter); GType gst_timeoverlay_get_type (void) { static GType timeoverlay_type = 0; if (!timeoverlay_type) { static const GTypeInfo timeoverlay_info = { sizeof (GstTimeoverlayClass), gst_timeoverlay_base_init, NULL, gst_timeoverlay_class_init, NULL, NULL, sizeof (GstTimeoverlay), 0, gst_timeoverlay_init, }; timeoverlay_type = g_type_register_static (GST_TYPE_VIDEOFILTER, "GstTimeoverlay", &timeoverlay_info, 0); } return timeoverlay_type; } static GstVideofilterFormat gst_timeoverlay_formats[] = { {"I420", 12, gst_timeoverlay_planar411,}, }; static void gst_timeoverlay_base_init (gpointer g_class) { static GstElementDetails timeoverlay_details = GST_ELEMENT_DETAILS ("Time Overlay", "Filter/Editor/Video", "Overlays the time on a video stream", "David Schleef <ds@schleef.org>"); GstElementClass *element_class = GST_ELEMENT_CLASS (g_class); GstVideofilterClass *videofilter_class = GST_VIDEOFILTER_CLASS (g_class); int i; gst_element_class_set_details (element_class, &timeoverlay_details); for (i = 0; i < G_N_ELEMENTS (gst_timeoverlay_formats); i++) { gst_videofilter_class_add_format (videofilter_class, gst_timeoverlay_formats + i); } gst_videofilter_class_add_pad_templates (GST_VIDEOFILTER_CLASS (g_class)); } static void gst_timeoverlay_class_init (gpointer g_class, gpointer class_data) { GObjectClass *gobject_class; GstVideofilterClass *videofilter_class; gobject_class = G_OBJECT_CLASS (g_class); videofilter_class = GST_VIDEOFILTER_CLASS (g_class); #if 0 g_object_class_install_property (gobject_class, ARG_METHOD, g_param_spec_enum ("method", "method", "method", GST_TYPE_TIMEOVERLAY_METHOD, GST_TIMEOVERLAY_METHOD_1, G_PARAM_READWRITE)); #endif gobject_class->set_property = gst_timeoverlay_set_property; gobject_class->get_property = gst_timeoverlay_get_property; videofilter_class->setup = gst_timeoverlay_setup; } static void gst_timeoverlay_init (GTypeInstance * instance, gpointer g_class) { GstTimeoverlay *timeoverlay = GST_TIMEOVERLAY (instance); GstVideofilter *videofilter; GST_DEBUG ("gst_timeoverlay_init"); videofilter = GST_VIDEOFILTER (timeoverlay); /* do stuff */ } static void gst_timeoverlay_set_property (GObject * object, guint prop_id, const GValue * value, GParamSpec * pspec) { GstTimeoverlay *src; /* it's not null if we got it, but it might not be ours */ g_return_if_fail (GST_IS_TIMEOVERLAY (object)); src = GST_TIMEOVERLAY (object); GST_DEBUG ("gst_timeoverlay_set_property"); switch (prop_id) { #if 0 case ARG_METHOD: src->method = g_value_get_enum (value); break; #endif default: break; } } static void gst_timeoverlay_get_property (GObject * object, guint prop_id, GValue * value, GParamSpec * pspec) { GstTimeoverlay *src; /* it's not null if we got it, but it might not be ours */ g_return_if_fail (GST_IS_TIMEOVERLAY (object)); src = GST_TIMEOVERLAY (object); switch (prop_id) { #if 0 case ARG_METHOD: g_value_set_enum (value, src->method); break; #endif default: G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); break; } } static gboolean plugin_init (GstPlugin * plugin) { if (!gst_library_load ("gstvideofilter")) return FALSE; return gst_element_register (plugin, "timeoverlay", GST_RANK_NONE, GST_TYPE_TIMEOVERLAY); } GST_PLUGIN_DEFINE (GST_VERSION_MAJOR, GST_VERSION_MINOR, "timeoverlay", "Time overlay", plugin_init, VERSION, GST_LICENSE, GST_PACKAGE, GST_ORIGIN) static void gst_timeoverlay_setup (GstVideofilter * videofilter) { GstTimeoverlay *timeoverlay; PangoFontDescription *font_description; PangoContext *context; g_return_if_fail (GST_IS_TIMEOVERLAY (videofilter)); timeoverlay = GST_TIMEOVERLAY (videofilter); /* if any setup needs to be done, do it here */ /* what does this affect? */ context = pango_ft2_get_context (100, 100); 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 (font_description, g_strdup ("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, 12 * PANGO_SCALE); pango_context_set_font_description (context, font_description); timeoverlay->context = context; timeoverlay->font_description = font_description; } static char * gst_timeoverlay_print_smpte_time (guint64 time) { int hours; int minutes; int seconds; int ms; double x; x = rint ((time + 500000) * 1e-6); hours = floor (x / (60 * 60 * 1000)); x -= hours * 60 * 60 * 1000; minutes = floor (x / (60 * 1000)); x -= minutes * 60 * 1000; seconds = floor (x / (1000)); x -= seconds * 1000; ms = rint (x); return g_strdup_printf ("%02d:%02d:%02d.%03d", hours, minutes, seconds, ms); } static void gst_timeoverlay_planar411 (GstVideofilter * videofilter, void *dest, void *src) { GstTimeoverlay *timeoverlay; int width; int height; PangoRectangle logical_rect; PangoLayout *layout; int b_height, b_width; FT_Bitmap bitmap; char *string; int i; g_return_if_fail (GST_IS_TIMEOVERLAY (videofilter)); timeoverlay = GST_TIMEOVERLAY (videofilter); width = gst_videofilter_get_input_width (videofilter); height = gst_videofilter_get_input_height (videofilter); width = gst_videofilter_get_input_width (videofilter); height = gst_videofilter_get_input_height (videofilter); layout = pango_layout_new (timeoverlay->context); string = gst_timeoverlay_print_smpte_time (GST_BUFFER_TIMESTAMP (videofilter-> in_buf)); pango_layout_set_text (layout, string, strlen (string)); g_free (string); pango_layout_set_alignment (layout, PANGO_ALIGN_LEFT); pango_layout_set_width (layout, -1); pango_layout_get_extents (layout, NULL, &logical_rect); b_height = PANGO_PIXELS (logical_rect.height); b_width = PANGO_PIXELS (logical_rect.width); //hheight = 20; memcpy (dest, src, videofilter->from_buf_size); for (i = 0; i < b_height; i++) { memset (dest + i * width, 0, b_width); } for (i = 0; i < b_height / 2; i++) { memset (dest + width * height + i * (width / 2), 128, b_width / 2); memset (dest + width * height + (width / 2) * (height / 2) + i * (width / 2), 128, b_width / 2); } bitmap.rows = b_height; bitmap.width = b_width; bitmap.pitch = width; bitmap.buffer = dest; bitmap.num_grays = 256; bitmap.pixel_mode = ft_pixel_mode_grays; pango_ft2_render_layout (&bitmap, layout, 0, 0); }