--- /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.
+ */
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+#include <gst/gst.h>
+#include "gsttextoverlay.h"
+
+static GstElementDetails textoverlay_details = {
+ "Text Overlay",
+ "Filter/Editor/Video",
+ "Adds text strings on top of a video buffer",
+ "David Schleef <ds@schleef.org>"
+};
+
+enum
+{
+ ARG_0,
+ ARG_TEXT,
+ ARG_VALIGN,
+ ARG_HALIGN,
+ ARG_X0,
+ ARG_Y0,
+ ARG_FONT_DESC
+};
+
+
+static GstStaticPadTemplate textoverlay_src_template_factory =
+GST_STATIC_PAD_TEMPLATE ("src",
+ GST_PAD_SRC,
+ GST_PAD_ALWAYS,
+ GST_STATIC_CAPS ("video/x-raw-yuv, "
+ "format = (fourcc) I420, "
+ "width = (int) [ 1, MAX ], " "height = (int) [ 1, MAX ]")
+ );
+
+static GstStaticPadTemplate video_sink_template_factory =
+GST_STATIC_PAD_TEMPLATE ("video_sink",
+ GST_PAD_SINK,
+ GST_PAD_ALWAYS,
+ GST_STATIC_CAPS ("video/x-raw-yuv, "
+ "format = (fourcc) I420, "
+ "width = (int) [ 1, MAX ], " "height = (int) [ 1, MAX ]")
+ );
+
+static GstStaticPadTemplate text_sink_template_factory =
+GST_STATIC_PAD_TEMPLATE ("text_sink",
+ GST_PAD_SINK,
+ GST_PAD_ALWAYS,
+ GST_STATIC_CAPS ("text/plain")
+ );
+
+static void gst_textoverlay_base_init (gpointer g_class);
+static void gst_textoverlay_class_init (GstTextOverlayClass * klass);
+static void gst_textoverlay_init (GstTextOverlay * overlay);
+static void gst_textoverlay_set_property (GObject * object,
+ guint prop_id, const GValue * value, GParamSpec * pspec);
+static void gst_textoverlay_get_property (GObject * object,
+ guint prop_id, GValue * value, GParamSpec * pspec);
+static GstElementStateReturn gst_textoverlay_change_state (GstElement *
+ element);
+static void gst_textoverlay_finalize (GObject * object);
+
+
+static GstElementClass *parent_class = NULL;
+
+/*static guint gst_textoverlay_signals[LAST_SIGNAL] = { 0 }; */
+
+
+GType
+gst_textoverlay_get_type (void)
+{
+ static GType textoverlay_type = 0;
+
+ if (!textoverlay_type) {
+ static const GTypeInfo textoverlay_info = {
+ sizeof (GstTextOverlayClass),
+ gst_textoverlay_base_init,
+ NULL,
+ (GClassInitFunc) gst_textoverlay_class_init,
+ NULL,
+ NULL,
+ sizeof (GstTextOverlay),
+ 0,
+ (GInstanceInitFunc) gst_textoverlay_init,
+ };
+
+ textoverlay_type =
+ g_type_register_static (GST_TYPE_ELEMENT, "GstTextOverlay",
+ &textoverlay_info, 0);
+ }
+ return textoverlay_type;
+}
+
+static void
+gst_textoverlay_base_init (gpointer g_class)
+{
+ GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
+
+ gst_element_class_add_pad_template (element_class,
+ gst_static_pad_template_get (&textoverlay_src_template_factory));
+ gst_element_class_add_pad_template (element_class,
+ gst_static_pad_template_get (&video_sink_template_factory));
+ gst_element_class_add_pad_template (element_class,
+ gst_static_pad_template_get (&text_sink_template_factory));
+
+ gst_element_class_set_details (element_class, &textoverlay_details);
+}
+
+static void
+gst_textoverlay_class_init (GstTextOverlayClass * klass)
+{
+ GObjectClass *gobject_class;
+ GstElementClass *gstelement_class;
+
+ gobject_class = (GObjectClass *) klass;
+ gstelement_class = (GstElementClass *) klass;
+
+ parent_class = g_type_class_peek_parent (klass);
+
+ gobject_class->finalize = gst_textoverlay_finalize;
+ gobject_class->set_property = gst_textoverlay_set_property;
+ gobject_class->get_property = gst_textoverlay_get_property;
+
+ gstelement_class->change_state = gst_textoverlay_change_state;
+ g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_TEXT,
+ g_param_spec_string ("text", "text",
+ "Text to be display.", "", G_PARAM_WRITABLE));
+ g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_VALIGN,
+ g_param_spec_string ("valign", "vertical alignment",
+ "Vertical alignment of the text. "
+ "Can be either 'baseline', 'bottom', or 'top'",
+ "baseline", G_PARAM_WRITABLE));
+ g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_HALIGN,
+ g_param_spec_string ("halign", "horizontal alignment",
+ "Horizontal alignment of the text. "
+ "Can be either 'left', 'right', or 'center'",
+ "center", G_PARAM_WRITABLE));
+ g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_X0,
+ g_param_spec_int ("x0", "X position",
+ "Initial X position."
+ " Horizontal aligment takes this point"
+ " as reference.", G_MININT, G_MAXINT, 0, G_PARAM_WRITABLE));
+ g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_Y0,
+ g_param_spec_int ("y0", "Y position",
+ "Initial Y position."
+ " Vertical aligment takes this point"
+ " as reference.", G_MININT, G_MAXINT, 0, G_PARAM_WRITABLE));
+ g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_FONT_DESC,
+ g_param_spec_string ("font-desc", "font description",
+ "Pango font description of font "
+ "to be used for rendering. "
+ "See documentation of "
+ "pango_font_description_from_string"
+ " for syntax.", "", G_PARAM_WRITABLE));
+}
+
+
+#if 0
+static void
+resize_bitmap (GstTextOverlay * overlay, int width, int height)
+{
+ FT_Bitmap *bitmap = &overlay->bitmap;
+ int pitch = (width | 3) + 1;
+ int size = pitch * height;
+
+ /* no need to keep reallocating; just keep the maximum size so far */
+ if (size <= overlay->bitmap_buffer_size) {
+ bitmap->rows = height;
+ bitmap->width = width;
+ bitmap->pitch = pitch;
+ memset (bitmap->buffer, 0, overlay->bitmap_buffer_size);
+ return;
+ }
+ if (!bitmap->buffer) {
+ /* initialize */
+ bitmap->pixel_mode = ft_pixel_mode_grays;
+ bitmap->num_grays = 256;
+ }
+ if (bitmap->buffer)
+ bitmap->buffer = g_realloc (bitmap->buffer, size);
+ else
+ bitmap->buffer = g_malloc (size);
+ bitmap->rows = height;
+ bitmap->width = width;
+ bitmap->pitch = pitch;
+ memset (bitmap->buffer, 0, size);
+ overlay->bitmap_buffer_size = size;
+}
+#endif
+
+static void
+gst_textoverlay_render_text (GstTextOverlay * overlay, gchar * text,
+ int textlen)
+{
+ cairo_text_extents_t extents;
+ char *string;
+
+ string = g_strdup_printf ("%.*s", textlen, text);
+
+ if (overlay->pixbuf)
+ g_free (overlay->pixbuf);
+ overlay->pixbuf = g_malloc (4 * overlay->width * overlay->text_height);
+ cairo_set_target_image (overlay->cr, overlay->pixbuf, CAIRO_FORMAT_ARGB32,
+ overlay->width, overlay->text_height, overlay->width * 4);
+
+ cairo_save (overlay->cr);
+ cairo_rectangle (overlay->cr, 0, 0, overlay->width, overlay->text_height);
+ cairo_set_alpha (overlay->cr, 0.0);
+ cairo_set_operator (overlay->cr, CAIRO_OPERATOR_SRC);
+ cairo_fill (overlay->cr);
+ cairo_restore (overlay->cr);
+
+ cairo_save (overlay->cr);
+ cairo_text_extents (overlay->cr, string, &extents);
+ cairo_set_rgb_color (overlay->cr, 1, 1, 1);
+ cairo_move_to (overlay->cr, 0, overlay->text_height - 2);
+ cairo_show_text (overlay->cr, string);
+
+ cairo_text_path (overlay->cr, string);
+ cairo_set_rgb_color (overlay->cr, 0, 0, 0);
+ cairo_set_line_width (overlay->cr, 1.0);
+ cairo_stroke (overlay->cr);
+
+ g_free (string);
+
+ cairo_restore (overlay->cr);
+
+ overlay->text_width = MIN (extents.width, overlay->width);
+}
+
+/* static GstPadLinkReturn */
+/* gst_textoverlay_text_sinkconnect (GstPad *pad, GstCaps *caps) */
+/* { */
+/* return GST_PAD_LINK_DONE; */
+/* } */
+
+
+static GstPadLinkReturn
+gst_textoverlay_video_sinkconnect (GstPad * pad, const GstCaps * caps)
+{
+ GstTextOverlay *overlay;
+ GstStructure *structure;
+
+ overlay = GST_TEXTOVERLAY (gst_pad_get_parent (pad));
+
+ structure = gst_caps_get_structure (caps, 0);
+ overlay->width = overlay->height = 0;
+ gst_structure_get_int (structure, "width", &overlay->width);
+ gst_structure_get_int (structure, "height", &overlay->height);
+
+ return gst_pad_try_set_caps (overlay->srcpad, caps);
+}
+
+
+static void
+gst_text_overlay_blit_yuv420 (GstTextOverlay * overlay, guchar * pixbuf,
+ int x0, int y0)
+{
+ int i;
+ int j;
+ int x, a, y;
+
+ if (x0 < 0)
+ x0 = 0;
+ if (y0 < 0)
+ y0 = 0;
+
+ GST_LOG ("%d %d %d %d %d %d %p", overlay->text_width, overlay->text_height,
+ overlay->width, overlay->height, x0, y0, pixbuf);
+
+ for (i = 0; i < overlay->text_height; i++) {
+ for (j = 0; j < overlay->text_width; j++) {
+#if 0
+ x = pixbuf[(i + y0) * overlay->width + (j + x0)];
+ a = overlay->pixbuf[4 * (i * overlay->width + j) + 0];
+ y = overlay->pixbuf[4 * (i * overlay->width + j) + 1];
+ pixbuf[(i + y0) * overlay->width + (j + x0)] =
+ (y * a + x * (255 - a)) / 255;
+#endif
+ x = a = 0;
+ y = overlay->pixbuf[4 * (i * overlay->width + j) + 1];
+ pixbuf[(i + y0) * overlay->width + (j + x0)] = y;
+ }
+ }
+
+}
+
+
+static void
+gst_textoverlay_video_chain (GstPad * pad, GstData * _data)
+{
+ GstBuffer *buf = GST_BUFFER (_data);
+ GstTextOverlay *overlay;
+ guchar *pixbuf;
+ gint x0, y0;
+
+ g_return_if_fail (pad != NULL);
+ g_return_if_fail (GST_IS_PAD (pad));
+ g_return_if_fail (buf != NULL);
+ overlay = GST_TEXTOVERLAY (gst_pad_get_parent (pad));
+ g_return_if_fail (overlay != NULL);
+ g_return_if_fail (GST_IS_TEXTOVERLAY (overlay));
+
+ if (!GST_IS_BUFFER (_data))
+ return;
+
+ pixbuf = GST_BUFFER_DATA (buf);
+
+ x0 = overlay->x0;
+ y0 = overlay->y0;
+ switch (overlay->valign) {
+ case GST_TEXT_OVERLAY_VALIGN_BOTTOM:
+ y0 -= overlay->text_height;
+ break;
+ case GST_TEXT_OVERLAY_VALIGN_BASELINE:
+#define BASELINE 2
+ y0 -= (overlay->text_height - BASELINE);
+ break;
+ case GST_TEXT_OVERLAY_VALIGN_TOP:
+ break;
+ }
+
+ switch (overlay->halign) {
+ case GST_TEXT_OVERLAY_HALIGN_LEFT:
+ break;
+ case GST_TEXT_OVERLAY_HALIGN_RIGHT:
+ x0 -= overlay->text_width;
+ break;
+ case GST_TEXT_OVERLAY_HALIGN_CENTER:
+ x0 -= overlay->text_width;
+ break;
+ }
+
+ gst_text_overlay_blit_yuv420 (overlay, pixbuf, x0, y0);
+
+ gst_pad_push (overlay->srcpad, GST_DATA (buf));
+}
+
+#define PAST_END(buffer, time) \
+ (GST_BUFFER_TIMESTAMP (buffer) != GST_CLOCK_TIME_NONE && \
+ GST_BUFFER_DURATION (buffer) != GST_CLOCK_TIME_NONE && \
+ GST_BUFFER_TIMESTAMP (buffer) + GST_BUFFER_DURATION (buffer) \
+ < (time))
+
+static void
+gst_textoverlay_loop (GstElement * element)
+{
+ GstTextOverlay *overlay;
+ GstBuffer *video_frame;
+ guint64 now;
+
+ g_return_if_fail (element != NULL);
+ g_return_if_fail (GST_IS_TEXTOVERLAY (element));
+ overlay = GST_TEXTOVERLAY (element);
+
+ video_frame = GST_BUFFER (gst_pad_pull (overlay->video_sinkpad));
+ now = GST_BUFFER_TIMESTAMP (video_frame);
+
+ /*
+ * This state machine has a bug that can't be resolved easily.
+ * (Needs a more complicated state machine.) Basically, if the
+ * text that came from a buffer from the sink pad is being
+ * displayed, and the default text is changed by set_parameter,
+ * we'll incorrectly display the default text.
+ *
+ * Otherwise, this is a pretty decent state machine that handles
+ * buffer timestamps and durations correctly. (I think)
+ */
+
+ while (overlay->next_buffer == NULL) {
+ GST_DEBUG ("attempting to pull a buffer");
+
+ /* read all text buffers until we get one "in the future" */
+ if (!GST_PAD_IS_USABLE (overlay->text_sinkpad)) {
+ break;
+ }
+ overlay->next_buffer = GST_BUFFER (gst_pad_pull (overlay->text_sinkpad));
+ if (!overlay->next_buffer)
+ break;
+
+ if (PAST_END (overlay->next_buffer, now)) {
+ gst_buffer_unref (overlay->next_buffer);
+ overlay->next_buffer = NULL;
+ }
+ }
+
+ if (overlay->next_buffer &&
+ (GST_BUFFER_TIMESTAMP (overlay->next_buffer) <= now ||
+ GST_BUFFER_TIMESTAMP (overlay->next_buffer) == GST_CLOCK_TIME_NONE)) {
+ GST_DEBUG ("using new buffer");
+
+ if (overlay->current_buffer) {
+ gst_buffer_unref (overlay->current_buffer);
+ }
+ overlay->current_buffer = overlay->next_buffer;
+ overlay->next_buffer = NULL;
+
+ GST_DEBUG ("rendering '%*s'",
+ GST_BUFFER_SIZE (overlay->current_buffer),
+ GST_BUFFER_DATA (overlay->current_buffer));
+ gst_textoverlay_render_text (overlay,
+ GST_BUFFER_DATA (overlay->current_buffer),
+ GST_BUFFER_SIZE (overlay->current_buffer));
+ overlay->need_render = FALSE;
+ }
+
+ if (overlay->current_buffer && PAST_END (overlay->current_buffer, now)) {
+ GST_DEBUG ("dropping old buffer");
+
+ gst_buffer_unref (overlay->current_buffer);
+ overlay->current_buffer = NULL;
+
+ overlay->need_render = TRUE;
+ }
+
+ if (overlay->need_render) {
+ GST_DEBUG ("rendering '%s'", overlay->default_text);
+ gst_textoverlay_render_text (overlay,
+ overlay->default_text, strlen (overlay->default_text));
+
+ overlay->need_render = FALSE;
+ }
+
+ gst_textoverlay_video_chain (overlay->srcpad, GST_DATA (video_frame));
+}
+
+
+static GstElementStateReturn
+gst_textoverlay_change_state (GstElement * element)
+{
+ GstTextOverlay *overlay;
+
+ overlay = GST_TEXTOVERLAY (element);
+
+ switch (GST_STATE_TRANSITION (element)) {
+ case GST_STATE_PAUSED_TO_PLAYING:
+ break;
+ case GST_STATE_PLAYING_TO_PAUSED:
+ break;
+ case GST_STATE_PAUSED_TO_READY:
+ break;
+ }
+
+ parent_class->change_state (element);
+
+ return GST_STATE_SUCCESS;
+}
+
+static void
+gst_textoverlay_finalize (GObject * object)
+{
+ GstTextOverlay *overlay = GST_TEXTOVERLAY (object);
+
+ if (overlay->cr) {
+ cairo_destroy (overlay->cr);
+ }
+
+ G_OBJECT_CLASS (parent_class)->finalize (object);
+}
+
+static void
+gst_textoverlay_init (GstTextOverlay * overlay)
+{
+ cairo_font_extents_t font_extents;
+
+ /* video sink */
+ overlay->video_sinkpad =
+ gst_pad_new_from_template (gst_static_pad_template_get
+ (&video_sink_template_factory), "video_sink");
+ gst_pad_set_link_function (overlay->video_sinkpad,
+ gst_textoverlay_video_sinkconnect);
+ gst_element_add_pad (GST_ELEMENT (overlay), overlay->video_sinkpad);
+
+ /* text sink */
+ overlay->text_sinkpad =
+ gst_pad_new_from_template (gst_static_pad_template_get
+ (&text_sink_template_factory), "text_sink");
+ gst_element_add_pad (GST_ELEMENT (overlay), overlay->text_sinkpad);
+
+ /* (video) source */
+ overlay->srcpad =
+ gst_pad_new_from_template (gst_static_pad_template_get
+ (&textoverlay_src_template_factory), "src");
+ gst_element_add_pad (GST_ELEMENT (overlay), overlay->srcpad);
+
+ overlay->cr = cairo_create ();
+
+ overlay->halign = GST_TEXT_OVERLAY_HALIGN_CENTER;
+ overlay->valign = GST_TEXT_OVERLAY_VALIGN_BASELINE;
+ overlay->x0 = overlay->y0 = 0;
+
+ overlay->default_text = g_strdup ("");
+ overlay->need_render = TRUE;
+
+ cairo_select_font (overlay->cr, "sans", 0, 0);
+ cairo_scale_font (overlay->cr, 50);
+
+ cairo_current_font_extents (overlay->cr, &font_extents);
+ overlay->text_height = font_extents.height;
+
+ gst_element_set_loop_function (GST_ELEMENT (overlay), gst_textoverlay_loop);
+}
+
+
+static void
+gst_textoverlay_set_property (GObject * object, guint prop_id,
+ const GValue * value, GParamSpec * pspec)
+{
+ GstTextOverlay *overlay;
+
+ /* it's not null if we got it, but it might not be ours */
+ g_return_if_fail (GST_IS_TEXTOVERLAY (object));
+ overlay = GST_TEXTOVERLAY (object);
+
+ switch (prop_id) {
+
+ case ARG_TEXT:
+ if (overlay->default_text) {
+ g_free (overlay->default_text);
+ }
+ overlay->default_text = g_strdup (g_value_get_string (value));
+ overlay->need_render = TRUE;
+ break;
+
+ case ARG_VALIGN:
+ if (strcasecmp (g_value_get_string (value), "baseline") == 0)
+ overlay->valign = GST_TEXT_OVERLAY_VALIGN_BASELINE;
+ else if (strcasecmp (g_value_get_string (value), "bottom") == 0)
+ overlay->valign = GST_TEXT_OVERLAY_VALIGN_BOTTOM;
+ else if (strcasecmp (g_value_get_string (value), "top") == 0)
+ overlay->valign = GST_TEXT_OVERLAY_VALIGN_TOP;
+ else
+ g_warning ("Invalid 'valign' property value: %s",
+ g_value_get_string (value));
+ break;
+
+ case ARG_HALIGN:
+ if (strcasecmp (g_value_get_string (value), "left") == 0)
+ overlay->halign = GST_TEXT_OVERLAY_HALIGN_LEFT;
+ else if (strcasecmp (g_value_get_string (value), "right") == 0)
+ overlay->halign = GST_TEXT_OVERLAY_HALIGN_RIGHT;
+ else if (strcasecmp (g_value_get_string (value), "center") == 0)
+ overlay->halign = GST_TEXT_OVERLAY_HALIGN_CENTER;
+ else
+ g_warning ("Invalid 'halign' property value: %s",
+ g_value_get_string (value));
+ break;
+
+ case ARG_X0:
+ overlay->x0 = g_value_get_int (value);
+ break;
+
+ case ARG_Y0:
+ overlay->y0 = g_value_get_int (value);
+ break;
+
+ case ARG_FONT_DESC:
+ {
+#if 0
+ PangoFontDescription *desc;
+
+ desc = pango_font_description_from_string (g_value_get_string (value));
+ if (desc) {
+ g_message ("font description set: %s", g_value_get_string (value));
+ pango_layout_set_font_description (overlay->layout, desc);
+ pango_font_description_free (desc);
+ render_text (overlay);
+ } else
+ g_warning ("font description parse failed: %s",
+ g_value_get_string (value));
+#endif
+ break;
+ }
+
+ default:
+ break;
+ }
+}
+
+static void
+gst_textoverlay_get_property (GObject * object, guint prop_id, GValue * value,
+ GParamSpec * pspec)
+{
+ GstTextOverlay *overlay;
+
+ /* it's not null if we got it, but it might not be ours */
+ g_return_if_fail (GST_IS_TEXTOVERLAY (object));
+ overlay = GST_TEXTOVERLAY (object);
+
+ switch (prop_id) {
+ default:
+ G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+ break;
+ }
+}
--- /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.
+ */
+
+/*
+ * 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 <cairo.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 void
+gst_timeoverlay_setup (GstVideofilter * videofilter)
+{
+ GstTimeoverlay *timeoverlay;
+ cairo_font_extents_t font_extents;
+
+ g_return_if_fail (GST_IS_TIMEOVERLAY (videofilter));
+ timeoverlay = GST_TIMEOVERLAY (videofilter);
+
+ /* if any setup needs to be done, do it here */
+
+ timeoverlay->cr = cairo_create ();
+
+ cairo_set_rgb_color (timeoverlay->cr, 0, 0, 0);
+
+ cairo_select_font (timeoverlay->cr, "monospace", 0, 0);
+ cairo_scale_font (timeoverlay->cr, 20);
+
+ cairo_current_font_extents (timeoverlay->cr, &font_extents);
+ timeoverlay->text_height = font_extents.height;
+
+}
+
+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;
+ int b_width;
+ char *string;
+ int i, j;
+ uint8_t *image;
+ cairo_text_extents_t extents;
+
+ 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);
+
+ string =
+ gst_timeoverlay_print_smpte_time (GST_BUFFER_TIMESTAMP (videofilter->
+ in_buf));
+
+ image = g_malloc (4 * width * timeoverlay->text_height);
+
+ cairo_set_target_image (timeoverlay->cr, image, CAIRO_FORMAT_ARGB32,
+ width, timeoverlay->text_height, width * 4);
+
+ cairo_save (timeoverlay->cr);
+ cairo_rectangle (timeoverlay->cr, 0, 0, width, timeoverlay->text_height);
+ cairo_set_alpha (timeoverlay->cr, 0);
+ cairo_set_operator (timeoverlay->cr, CAIRO_OPERATOR_SRC);
+ cairo_fill (timeoverlay->cr);
+ cairo_restore (timeoverlay->cr);
+
+ cairo_save (timeoverlay->cr);
+ cairo_text_extents (timeoverlay->cr, string, &extents);
+
+ cairo_set_rgb_color (timeoverlay->cr, 1, 1, 1);
+ cairo_move_to (timeoverlay->cr, 0, timeoverlay->text_height - 2);
+ cairo_show_text (timeoverlay->cr, string);
+ g_free (string);
+#if 0
+ cairo_text_path (timeoverlay->cr, string);
+ cairo_set_rgb_color (timeoverlay->cr, 1, 1, 1);
+ cairo_set_line_width (timeoverlay->cr, 1.0);
+ cairo_stroke (timeoverlay->cr);
+#endif
+
+ cairo_restore (timeoverlay->cr);
+
+ b_width = extents.width;
+ if (b_width > width)
+ b_width = width;
+
+ memcpy (dest, src, videofilter->from_buf_size);
+ for (i = 0; i < timeoverlay->text_height; i++) {
+ for (j = 0; j < b_width; j++) {
+ ((uint8_t *) dest)[i * width + j] = image[(i * width + j) * 4 + 0];
+ }
+ }
+ for (i = 0; i < timeoverlay->text_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);
+ }
+
+ g_free (image);
+}
projects / platform / upstream / gst-plugins-good.git / commitdiff