--- /dev/null
+/* 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
+ */
+
+
+/*#define DEBUG_ENABLED */
+#include <gsttimeoverlay.h>
+
+#include <pango/pango.h>
+#include <pango/pangoft2.h>
+
+#include <math.h>
+
+
+
+/* elementfactory information */
+static GstElementDetails timeoverlay_details = {
+ "Video Filter Template",
+ "Filter/Video",
+ "LGPL",
+ "Template for a video filter",
+ VERSION,
+ "David Schleef <ds@schleef.org>",
+ "(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;i<G_N_ELEMENTS(gst_timeoverlay_formats);i++){
+ gst_videofilter_class_add_format(gstvideofilter_class, gst_timeoverlay_formats + i);
+ }
+}
+
+static GstCaps *gst_timeoverlay_get_capslist(void)
+{
+ GstVideofilterClass *klass;
+
+ klass = g_type_class_ref(GST_TYPE_VIDEOFILTER);
+
+ return gst_videofilter_class_get_capslist(klass);
+}
+
+static GstPadTemplate *
+gst_timeoverlay_src_template_factory(void)
+{
+ static GstPadTemplate *templ = NULL;
+
+ if(!templ){
+ GstCaps *caps = GST_CAPS_NEW("src","video/raw",
+ "width", GST_PROPS_INT_RANGE (0, G_MAXINT),
+ "height", GST_PROPS_INT_RANGE (0, G_MAXINT));
+
+ caps = gst_caps_intersect(caps, gst_timeoverlay_get_capslist ());
+
+ templ = GST_PAD_TEMPLATE_NEW("src", GST_PAD_SRC, GST_PAD_ALWAYS, caps);
+ }
+ return templ;
+}
+
+static GstPadTemplate *
+gst_timeoverlay_sink_template_factory(void)
+{
+ static GstPadTemplate *templ = NULL;
+
+ if(!templ){
+ GstCaps *caps = GST_CAPS_NEW("sink","video/raw",
+ "width", GST_PROPS_INT_RANGE (0, G_MAXINT),
+ "height", GST_PROPS_INT_RANGE (0, G_MAXINT));
+
+ caps = gst_caps_intersect(caps, gst_timeoverlay_get_capslist ());
+
+ templ = GST_PAD_TEMPLATE_NEW("src", GST_PAD_SINK, GST_PAD_ALWAYS, caps);
+ }
+ return templ;
+}
+
+static void
+gst_timeoverlay_init (GstTimeoverlay *timeoverlay)
+{
+ GstVideofilter *videofilter;
+
+ GST_DEBUG("gst_timeoverlay_init");
+
+ videofilter = GST_VIDEOFILTER(timeoverlay);
+
+ videofilter->sinkpad = 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<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);
+}
projects / platform / upstream / gstreamer.git / commitdiff