/* GStreamer * Copyright (C) <1999> Erik Walthinsen * Copyright (C) <2003> David Schleef * * 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 */ /*#define DEBUG_ENABLED */ #include #include #include #include /* elementfactory information */ static GstElementDetails timeoverlay_details = { "Video Filter Template", "Filter/Video", "LGPL", "Template for a video filter", VERSION, "David Schleef ", "(C) 2003", }; /* GstTimeoverlay signals and args */ enum { /* FILL ME */ LAST_SIGNAL }; enum { ARG_0, /* FILL ME */ }; static void gst_timeoverlay_class_init (GstTimeoverlayClass *klass); static void gst_timeoverlay_init (GstTimeoverlay *timeoverlay); 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); static GstTimeoverlayClass *this_class = NULL; static GstVideofilterClass *parent_class = NULL; static GstElementClass *element_class = NULL; GType gst_timeoverlay_get_type (void) { static GType timeoverlay_type = 0; if (!timeoverlay_type) { static const GTypeInfo timeoverlay_info = { sizeof(GstTimeoverlayClass), NULL, NULL, (GClassInitFunc)gst_timeoverlay_class_init, NULL, NULL, sizeof(GstTimeoverlay), 0, (GInstanceInitFunc)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_class_init (GstTimeoverlayClass *klass) { GObjectClass *gobject_class; GstElementClass *gstelement_class; GstVideofilterClass *gstvideofilter_class; int i; gobject_class = (GObjectClass*)klass; gstelement_class = (GstElementClass*)klass; gstvideofilter_class = (GstVideofilterClass *)klass; #if 0 g_object_class_install_property(G_OBJECT_CLASS(klass), ARG_METHOD, g_param_spec_enum("method","method","method", GST_TYPE_TIMEOVERLAY_METHOD, GST_TIMEOVERLAY_METHOD_90R, G_PARAM_READWRITE)); #endif this_class = klass; parent_class = g_type_class_ref(GST_TYPE_VIDEOFILTER); element_class = g_type_class_ref(GST_TYPE_ELEMENT); gobject_class->set_property = gst_timeoverlay_set_property; gobject_class->get_property = gst_timeoverlay_get_property; gstvideofilter_class->setup = gst_timeoverlay_setup; for(i=0;isinkpad = gst_pad_new_from_template ( GST_PAD_TEMPLATE_GET (gst_timeoverlay_sink_template_factory), "sink"); videofilter->srcpad = gst_pad_new_from_template ( GST_PAD_TEMPLATE_GET (gst_timeoverlay_src_template_factory), "src"); gst_videofilter_postinit(GST_VIDEOFILTER(timeoverlay)); } 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 (GModule *module, GstPlugin *plugin) { GstElementFactory *factory; if(!gst_library_load("gstvideofilter")) return FALSE; /* create an elementfactory for the timeoverlay element */ factory = gst_element_factory_new("timeoverlay",GST_TYPE_TIMEOVERLAY, &timeoverlay_details); g_return_val_if_fail(factory != NULL, FALSE); gst_element_factory_add_pad_template (factory, GST_PAD_TEMPLATE_GET (gst_timeoverlay_sink_template_factory)); gst_element_factory_add_pad_template (factory, GST_PAD_TEMPLATE_GET (gst_timeoverlay_src_template_factory)); gst_plugin_add_feature (plugin, GST_PLUGIN_FEATURE (factory)); return TRUE; } GstPluginDesc plugin_desc = { GST_VERSION_MAJOR, GST_VERSION_MINOR, "timeoverlay", plugin_init }; 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 height; int width; 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); 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