move pango to base

Original commit message from CVS:
move pango to base

1 files changed, 0 insertions, 1017 deletions

diff --git a/ext/pango/gsttextoverlay.c b/ext/pango/gsttextoverlay.c
deleted file mode 100644
index ce0329fe..00000000
--- a/ext/pango/gsttextoverlay.c
+++ /dev/null
@@ -1,1017 +0,0 @@
-/* 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/video/video.h>
-
-#include "gsttextoverlay.h"
-#include "gsttimeoverlay.h"
-#include "gstclockoverlay.h"
-#include "gsttextrender.h"
-
-/* FIXME:
- *  - use proper strides and offset for I420
- *  - if text is wider than the video picture, it does not get
- *    clipped properly during blitting (if wrapping is disabled)
- *  - make 'shading_value' a property (or enum:  light/normal/dark/verydark)?
- */
-
-GST_DEBUG_CATEGORY (pango_debug);
-#define GST_CAT_DEFAULT pango_debug
-
-static GstElementDetails text_overlay_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_SHADING,
-  ARG_VALIGN,
-  ARG_HALIGN,
-  ARG_XPAD,
-  ARG_YPAD,
-  ARG_DELTAX,
-  ARG_DELTAY,
-  ARG_WRAP_MODE,
-  ARG_FONT_DESC
-};
-
-
-static GstStaticPadTemplate src_template_factory =
-GST_STATIC_PAD_TEMPLATE ("src",
-    GST_PAD_SRC,
-    GST_PAD_ALWAYS,
-    GST_STATIC_CAPS (GST_VIDEO_CAPS_YUV ("I420"))
-    );
-
-static GstStaticPadTemplate video_sink_template_factory =
-GST_STATIC_PAD_TEMPLATE ("video_sink",
-    GST_PAD_SINK,
-    GST_PAD_ALWAYS,
-    GST_STATIC_CAPS (GST_VIDEO_CAPS_YUV ("I420"))
-    );
-
-static GstStaticPadTemplate text_sink_template_factory =
-    GST_STATIC_PAD_TEMPLATE ("text_sink",
-    GST_PAD_SINK,
-    GST_PAD_ALWAYS,
-    GST_STATIC_CAPS ("text/x-pango-markup; text/plain")
-    );
-
-/* These macros are adapted from videotestsrc.c */
-#define I420_Y_ROWSTRIDE(width) (GST_ROUND_UP_4(width))
-#define I420_U_ROWSTRIDE(width) (GST_ROUND_UP_8(width)/2)
-#define I420_V_ROWSTRIDE(width) ((GST_ROUND_UP_8(I420_Y_ROWSTRIDE(width)))/2)
-
-#define I420_Y_OFFSET(w,h) (0)
-#define I420_U_OFFSET(w,h) (I420_Y_OFFSET(w,h)+(I420_Y_ROWSTRIDE(w)*GST_ROUND_UP_2(h)))
-#define I420_V_OFFSET(w,h) (I420_U_OFFSET(w,h)+(I420_U_ROWSTRIDE(w)*GST_ROUND_UP_2(h)/2))
-
-#define I420_SIZE(w,h)     (I420_V_OFFSET(w,h)+(I420_V_ROWSTRIDE(w)*GST_ROUND_UP_2(h)/2))
-
-
-static GstStateChangeReturn gst_text_overlay_change_state (GstElement * element,
-    GstStateChange transition);
-static GstCaps *gst_text_overlay_getcaps (GstPad * pad);
-static gboolean gst_text_overlay_setcaps (GstPad * pad, GstCaps * caps);
-static GstPadLinkReturn gst_text_overlay_text_pad_linked (GstPad * pad,
-    GstPad * peer);
-static void gst_text_overlay_text_pad_unlinked (GstPad * pad);
-static GstFlowReturn gst_text_overlay_collected (GstCollectPads * pads,
-    gpointer data);
-static void gst_text_overlay_finalize (GObject * object);
-static void gst_text_overlay_set_property (GObject * object, guint prop_id,
-    const GValue * value, GParamSpec * pspec);
-
-
-GST_BOILERPLATE (GstTextOverlay, gst_text_overlay, GstElement, GST_TYPE_ELEMENT)
-#define DEFAULT_YPAD    25
-#define DEFAULT_XPAD    25
-#define DEFAULT_DELTAX   0
-#define DEFAULT_DELTAY   0
-/* keep wrap enum in sync with string in class_init */
-#define DEFAULT_WRAP_MODE        GST_TEXT_OVERLAY_WRAP_MODE_WORD_CHAR
-#define DEFAULT_SHADING_VALUE    -80
-     static void gst_text_overlay_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 (&src_template_factory));
-  gst_element_class_add_pad_template (element_class,
-      gst_static_pad_template_get (&video_sink_template_factory));
-
-  /* ugh */
-  if (!GST_IS_TIME_OVERLAY_CLASS (g_class) &&
-      !GST_IS_CLOCK_OVERLAY_CLASS (g_class)) {
-    gst_element_class_add_pad_template (element_class,
-        gst_static_pad_template_get (&text_sink_template_factory));
-  }
-
-  gst_element_class_set_details (element_class, &text_overlay_details);
-}
-
-static gchar *
-gst_text_overlay_get_text (GstTextOverlay * overlay, GstBuffer * video_frame)
-{
-  return g_strdup (overlay->default_text);
-}
-
-static void
-gst_text_overlay_class_init (GstTextOverlayClass * klass)
-{
-  GObjectClass *gobject_class;
-  GstElementClass *gstelement_class;
-
-  gobject_class = (GObjectClass *) klass;
-  gstelement_class = (GstElementClass *) klass;
-
-  gobject_class->finalize = gst_text_overlay_finalize;
-  gobject_class->set_property = gst_text_overlay_set_property;
-
-  gstelement_class->change_state =
-      GST_DEBUG_FUNCPTR (gst_text_overlay_change_state);
-
-  klass->get_text = gst_text_overlay_get_text;
-  klass->pango_context = pango_ft2_get_context (72, 72);
-
-  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_SHADING,
-      g_param_spec_boolean ("shaded-background", "shaded background",
-          "Whether to shade the background under the text area", FALSE,
-          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_XPAD,
-      g_param_spec_int ("xpad", "horizontal paddding",
-          "Horizontal paddding when using left/right alignment",
-          0, G_MAXINT, DEFAULT_XPAD, G_PARAM_WRITABLE));
-  g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_YPAD,
-      g_param_spec_int ("ypad", "vertical padding",
-          "Vertical padding when using top/bottom alignment",
-          0, G_MAXINT, DEFAULT_YPAD, G_PARAM_WRITABLE));
-  g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_DELTAX,
-      g_param_spec_int ("deltax", "X position modifier",
-          "Shift X position to the left or to the right. Unit is pixels.",
-          G_MININT, G_MAXINT, 0, G_PARAM_WRITABLE));
-  g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_DELTAY,
-      g_param_spec_int ("deltay", "Y position modifier",
-          "Shift Y position up or down. Unit is pixels.",
-          G_MININT, G_MAXINT, 0, G_PARAM_WRITABLE));
-  g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_WRAP_MODE,
-      g_param_spec_string ("wrap-mode", "wrap mode",
-          "Whether to wrap the text and if so how."
-          "Can be either 'none', 'word', 'char' or 'wordchar'",
-          "wordchar", 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));
-}
-
-static void
-gst_text_overlay_finalize (GObject * object)
-{
-  GstTextOverlay *overlay = GST_TEXT_OVERLAY (object);
-
-  gst_collect_pads_stop (overlay->collect);
-  gst_object_unref (overlay->collect);
-
-  g_free (overlay->default_text);
-  g_free (overlay->bitmap.buffer);
-
-  if (overlay->layout)
-    g_object_unref (overlay->layout);
-
-  G_OBJECT_CLASS (parent_class)->finalize (object);
-}
-
-static void
-gst_text_overlay_init (GstTextOverlay * overlay, GstTextOverlayClass * klass)
-{
-  /* video sink */
-  overlay->video_sinkpad =
-      gst_pad_new_from_template (gst_static_pad_template_get
-      (&video_sink_template_factory), "video_sink");
-  gst_pad_set_getcaps_function (overlay->video_sinkpad,
-      GST_DEBUG_FUNCPTR (gst_text_overlay_getcaps));
-  gst_pad_set_setcaps_function (overlay->video_sinkpad,
-      GST_DEBUG_FUNCPTR (gst_text_overlay_setcaps));
-  gst_element_add_pad (GST_ELEMENT (overlay), overlay->video_sinkpad);
-
-  if (!GST_IS_TIME_OVERLAY_CLASS (klass) && !GST_IS_CLOCK_OVERLAY_CLASS (klass)) {
-    /* text sink */
-    overlay->text_sinkpad =
-        gst_pad_new_from_template (gst_static_pad_template_get
-        (&text_sink_template_factory), "text_sink");
-    gst_pad_set_link_function (overlay->text_sinkpad,
-        GST_DEBUG_FUNCPTR (gst_text_overlay_text_pad_linked));
-    gst_pad_set_unlink_function (overlay->text_sinkpad,
-        GST_DEBUG_FUNCPTR (gst_text_overlay_text_pad_unlinked));
-    gst_element_add_pad (GST_ELEMENT (overlay), overlay->text_sinkpad);
-  }
-
-  /* (video) source */
-  overlay->srcpad =
-      gst_pad_new_from_template (gst_static_pad_template_get
-      (&src_template_factory), "src");
-  gst_pad_set_getcaps_function (overlay->srcpad,
-      GST_DEBUG_FUNCPTR (gst_text_overlay_getcaps));
-  gst_element_add_pad (GST_ELEMENT (overlay), overlay->srcpad);
-
-  overlay->layout =
-      pango_layout_new (GST_TEXT_OVERLAY_GET_CLASS (overlay)->pango_context);
-  memset (&overlay->bitmap, 0, sizeof (overlay->bitmap));
-
-  overlay->halign = GST_TEXT_OVERLAY_HALIGN_CENTER;
-  overlay->valign = GST_TEXT_OVERLAY_VALIGN_BASELINE;
-  overlay->xpad = DEFAULT_XPAD;
-  overlay->ypad = DEFAULT_YPAD;
-  overlay->deltax = 0;
-  overlay->deltay = 0;
-
-  overlay->wrap_mode = DEFAULT_WRAP_MODE;
-
-  overlay->want_shading = FALSE;
-  overlay->shading_value = DEFAULT_SHADING_VALUE;
-
-  overlay->default_text = g_strdup ("");
-  overlay->need_render = TRUE;
-
-  overlay->fps_n = 0;
-  overlay->fps_d = 1;
-
-  overlay->collect = gst_collect_pads_new ();
-
-  gst_collect_pads_set_function (overlay->collect,
-      GST_DEBUG_FUNCPTR (gst_text_overlay_collected), overlay);
-
-  overlay->video_collect_data = gst_collect_pads_add_pad (overlay->collect,
-      overlay->video_sinkpad, sizeof (GstCollectData));
-
-  /* text pad will be added when it is linked */
-  overlay->text_collect_data = NULL;
-}
-
-static void
-gst_text_overlay_update_wrap_mode (GstTextOverlay * overlay)
-{
-  if (overlay->wrap_mode == GST_TEXT_OVERLAY_WRAP_MODE_NONE) {
-    GST_DEBUG_OBJECT (overlay, "Set wrap mode NONE");
-    pango_layout_set_width (overlay->layout, -1);
-  } else {
-    GST_DEBUG_OBJECT (overlay, "Set layout width %d", overlay->width);
-    GST_DEBUG_OBJECT (overlay, "Set wrap mode    %d", overlay->wrap_mode);
-    pango_layout_set_width (overlay->layout, overlay->width * PANGO_SCALE);
-    pango_layout_set_wrap (overlay->layout, (PangoWrapMode) overlay->wrap_mode);
-  }
-}
-
-
-/* FIXME: upstream nego (e.g. when the video window is resized) */
-
-static gboolean
-gst_text_overlay_setcaps (GstPad * pad, GstCaps * caps)
-{
-  GstTextOverlay *overlay;
-  GstStructure *structure;
-  gboolean ret = FALSE;
-  const GValue *fps;
-
-  if (!GST_PAD_IS_SINK (pad))
-    return TRUE;
-
-  g_return_val_if_fail (gst_caps_is_fixed (caps), FALSE);
-
-  overlay = GST_TEXT_OVERLAY (gst_pad_get_parent (pad));
-
-  overlay->width = 0;
-  overlay->height = 0;
-  structure = gst_caps_get_structure (caps, 0);
-  fps = gst_structure_get_value (structure, "framerate");
-
-  if (gst_structure_get_int (structure, "width", &overlay->width) &&
-      gst_structure_get_int (structure, "height", &overlay->height) &&
-      fps != NULL) {
-    ret = gst_pad_set_caps (overlay->srcpad, caps);
-  }
-
-  overlay->fps_n = gst_value_get_fraction_numerator (fps);
-  overlay->fps_d = gst_value_get_fraction_denominator (fps);
-
-  if (ret) {
-    GST_OBJECT_LOCK (overlay);
-    gst_text_overlay_update_wrap_mode (overlay);
-    GST_OBJECT_UNLOCK (overlay);
-  }
-
-  return ret;
-}
-
-static GstPadLinkReturn
-gst_text_overlay_text_pad_linked (GstPad * pad, GstPad * peer)
-{
-  GstTextOverlay *overlay;
-
-  overlay = GST_TEXT_OVERLAY (GST_PAD_PARENT (pad));
-
-  GST_DEBUG_OBJECT (overlay, "Text pad linked");
-
-  if (overlay->text_collect_data == NULL) {
-    overlay->text_collect_data = gst_collect_pads_add_pad (overlay->collect,
-        overlay->text_sinkpad, sizeof (GstCollectData));
-  }
-
-  overlay->need_render = TRUE;
-
-  return GST_PAD_LINK_OK;
-}
-
-static void
-gst_text_overlay_text_pad_unlinked (GstPad * pad)
-{
-  GstTextOverlay *overlay;
-
-  /* don't use gst_pad_get_parent() here, will deadlock */
-  overlay = GST_TEXT_OVERLAY (GST_PAD_PARENT (pad));
-
-  GST_DEBUG_OBJECT (overlay, "Text pad unlinked");
-
-  if (overlay->text_collect_data) {
-    gst_collect_pads_remove_pad (overlay->collect, overlay->text_sinkpad);
-    overlay->text_collect_data = NULL;
-  }
-
-  overlay->need_render = TRUE;
-}
-
-static void
-gst_text_overlay_set_property (GObject * object, guint prop_id,
-    const GValue * value, GParamSpec * pspec)
-{
-  GstTextOverlay *overlay = GST_TEXT_OVERLAY (object);
-
-  GST_OBJECT_LOCK (overlay);
-
-  switch (prop_id) {
-    case ARG_TEXT:
-      g_free (overlay->default_text);
-      overlay->default_text = g_value_dup_string (value);
-      overlay->need_render = TRUE;
-      break;
-
-    case ARG_SHADING:{
-      overlay->want_shading = g_value_get_boolean (value);
-      break;
-    }
-    case ARG_XPAD:{
-      overlay->xpad = g_value_get_int (value);
-      break;
-    }
-    case ARG_YPAD:{
-      overlay->ypad = g_value_get_int (value);
-      break;
-    }
-    case ARG_DELTAX:{
-      overlay->deltax = g_value_get_int (value);
-      break;
-    }
-    case ARG_DELTAY:{
-      overlay->deltay = g_value_get_int (value);
-      break;
-    }
-
-    case ARG_VALIGN:{
-      const gchar *s = g_value_get_string (value);
-
-      if (g_ascii_strcasecmp (s, "baseline") == 0)
-        overlay->valign = GST_TEXT_OVERLAY_VALIGN_BASELINE;
-      else if (g_ascii_strcasecmp (s, "bottom") == 0)
-        overlay->valign = GST_TEXT_OVERLAY_VALIGN_BOTTOM;
-      else if (g_ascii_strcasecmp (s, "top") == 0)
-        overlay->valign = GST_TEXT_OVERLAY_VALIGN_TOP;
-      else
-        g_warning ("Invalid 'valign' property value: %s", s);
-      break;
-    }
-
-    case ARG_HALIGN:{
-      const gchar *s = g_value_get_string (value);
-
-      if (g_ascii_strcasecmp (s, "left") == 0)
-        overlay->halign = GST_TEXT_OVERLAY_HALIGN_LEFT;
-      else if (g_ascii_strcasecmp (s, "right") == 0)
-        overlay->halign = GST_TEXT_OVERLAY_HALIGN_RIGHT;
-      else if (g_ascii_strcasecmp (s, "center") == 0)
-        overlay->halign = GST_TEXT_OVERLAY_HALIGN_CENTER;
-      else
-        g_warning ("Invalid 'halign' property value: %s", s);
-      break;
-    }
-
-    case ARG_WRAP_MODE:{
-      const gchar *s = g_value_get_string (value);
-
-      if (g_ascii_strcasecmp (s, "none") == 0)
-        overlay->wrap_mode = GST_TEXT_OVERLAY_WRAP_MODE_NONE;
-      else if (g_ascii_strcasecmp (s, "char") == 0)
-        overlay->wrap_mode = GST_TEXT_OVERLAY_WRAP_MODE_CHAR;
-      else if (g_ascii_strcasecmp (s, "word") == 0)
-        overlay->wrap_mode = GST_TEXT_OVERLAY_WRAP_MODE_WORD;
-      else if (g_ascii_strcasecmp (s, "wordchar") == 0)
-        overlay->wrap_mode = GST_TEXT_OVERLAY_WRAP_MODE_WORD_CHAR;
-      else
-        g_warning ("Invalid 'wrap-mode' property value: %s", s);
-
-      gst_text_overlay_update_wrap_mode (overlay);
-      break;
-    }
-
-    case ARG_FONT_DESC:
-    {
-      PangoFontDescription *desc;
-      const gchar *fontdesc_str;
-
-      fontdesc_str = g_value_get_string (value);
-      desc = pango_font_description_from_string (fontdesc_str);
-      if (desc) {
-        GST_LOG ("font description set: %s", fontdesc_str);
-        pango_layout_set_font_description (overlay->layout, desc);
-        pango_font_description_free (desc);
-      } else {
-        GST_WARNING ("font description parse failed: %s", fontdesc_str);
-      }
-      break;
-    }
-
-    default:
-      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
-      break;
-  }
-
-  overlay->need_render = TRUE;
-
-  GST_OBJECT_UNLOCK (overlay);
-}
-
-
-static GstCaps *
-gst_text_overlay_getcaps (GstPad * pad)
-{
-  GstTextOverlay *overlay;
-  GstPad *otherpad;
-  GstCaps *caps;
-
-  overlay = GST_TEXT_OVERLAY (gst_pad_get_parent (pad));
-
-  if (pad == overlay->srcpad)
-    otherpad = overlay->video_sinkpad;
-  else
-    otherpad = overlay->srcpad;
-
-  /* we can do what the peer can */
-  caps = gst_pad_peer_get_caps (otherpad);
-  if (caps) {
-    GstCaps *temp;
-    const GstCaps *templ;
-
-    GST_DEBUG_OBJECT (pad, "peer caps  %" GST_PTR_FORMAT, caps);
-
-    /* filtered against our padtemplate */
-    templ = gst_pad_get_pad_template_caps (otherpad);
-    GST_DEBUG_OBJECT (pad, "our template  %" GST_PTR_FORMAT, templ);
-    temp = gst_caps_intersect (caps, templ);
-    GST_DEBUG_OBJECT (pad, "intersected %" GST_PTR_FORMAT, temp);
-    gst_caps_unref (caps);
-    /* this is what we can do */
-    caps = temp;
-  } else {
-    /* no peer, our padtemplate is enough then */
-    caps = gst_caps_copy (gst_pad_get_pad_template_caps (pad));
-  }
-
-  GST_DEBUG_OBJECT (overlay, "returning  %" GST_PTR_FORMAT, caps);
-
-  gst_object_unref (overlay);
-
-  return caps;
-}
-
-#define BOX_XPAD         6
-#define BOX_YPAD         6
-
-static inline void
-gst_text_overlay_shade_y (GstTextOverlay * overlay, guchar * dest,
-    guint dest_stride, gint x0, gint x1, gint y0, gint y1)
-{
-  gint i, j;
-
-  x0 = CLAMP (x0 - BOX_XPAD, 0, overlay->width);
-  x1 = CLAMP (x1 + BOX_XPAD, 0, overlay->width);
-
-  y0 = CLAMP (y0 - BOX_YPAD, 0, overlay->height);
-  y1 = CLAMP (y1 + BOX_YPAD, 0, overlay->height);
-
-  for (i = y0; i < y1; ++i) {
-    for (j = x0; j < x1; ++j) {
-      gint y = dest[(i * dest_stride) + j] + overlay->shading_value;
-
-      dest[(i * dest_stride) + j] = CLAMP (y, 0, 255);
-    }
-  }
-}
-
-/* FIXME:
- *  - use proper strides and offset for I420
- *  - don't draw over the edge of the picture (try a longer
- *    text with a huge font size)
- */
-
-static inline void
-gst_text_overlay_blit_yuv420 (GstTextOverlay * overlay, FT_Bitmap * bitmap,
-    guint8 * yuv_pixels, gint x0, gint y0)
-{
-  int y;                        /* text bitmap coordinates */
-  int x1, y1;                   /* video buffer coordinates */
-  int bit_rowinc, uv_rowinc;
-  guint8 *p, *bitp, *u_p;
-  int video_width, video_height;
-  int bitmap_x0 = 0;            //x0 < 1 ? -(x0 - 1) : 1;       /* 1 pixel border */
-  int bitmap_y0 = y0 < 1 ? -(y0 - 1) : 1;       /* 1 pixel border */
-  int bitmap_width = bitmap->width - bitmap_x0;
-  int bitmap_height = bitmap->rows - bitmap_y0;
-  int u_plane_size;
-  int skip_y, skip_x;
-  guint8 v;
-
-  video_width = I420_Y_ROWSTRIDE (overlay->width);
-  video_height = overlay->height;
-
-/*
-  if (x0 < 0 && abs (x0) < bitmap_width) {
-    bitmap_x0 = abs (x0);
-    x0 = 0;
-  }
-*/
-
-  if (x0 + bitmap_x0 + bitmap_width > overlay->width - 1)       /* 1 pixel border */
-    bitmap_width -= x0 + bitmap_x0 + bitmap_width - overlay->width + 1;
-  if (y0 + bitmap_y0 + bitmap_height > video_height - 1)        /* 1 pixel border */
-    bitmap_height -= y0 + bitmap_y0 + bitmap_height - video_height + 1;
-
-  uv_rowinc = video_width / 2 - bitmap_width / 2;
-  bit_rowinc = bitmap->pitch - bitmap_width;
-  u_plane_size = (video_width / 2) * (video_height / 2);
-
-  y1 = y0 + bitmap_y0;
-  x1 = x0 + bitmap_x0;
-  bitp = bitmap->buffer + bitmap->pitch * bitmap_y0 + bitmap_x0;
-  for (y = bitmap_y0; y < bitmap_y0 + bitmap_height; y++) {
-    int n;
-
-    p = yuv_pixels + (y + y0) * I420_Y_ROWSTRIDE (overlay->width) + x1;
-    for (n = bitmap_width; n > 0; --n) {
-      v = *bitp;
-      if (v) {
-        p[-1] = CLAMP (p[-1] - v, 0, 255);
-        p[1] = CLAMP (p[1] - v, 0, 255);
-        p[-video_width] = CLAMP (p[-video_width] - v, 0, 255);
-        p[video_width] = CLAMP (p[video_width] - v, 0, 255);
-      }
-      p++;
-      bitp++;
-    }
-    bitp += bit_rowinc;
-  }
-
-  y = bitmap_y0;
-  y1 = y0 + bitmap_y0;
-  x1 = x0 + bitmap_x0;
-  bitp = bitmap->buffer + bitmap->pitch * bitmap_y0 + bitmap_x0;
-  p = yuv_pixels + video_width * y1 + x1;
-  u_p =
-      yuv_pixels + video_width * video_height + (video_width >> 1) * (y1 >> 1) +
-      (x1 >> 1);
-  skip_y = 0;
-  skip_x = 0;
-
-  for (; y < bitmap_y0 + bitmap_height; y++) {
-    int n;
-
-    x1 = x0 + bitmap_x0;
-    skip_x = 0;
-    for (n = bitmap_width; n > 0; --n) {
-      v = *bitp;
-      if (v) {
-        *p = v;
-        if (!skip_y) {
-          u_p[0] = u_p[u_plane_size] = 0x80;
-        }
-      }
-      if (!skip_y) {
-        skip_x = !skip_x;
-        if (!skip_x)
-          u_p++;
-      }
-      p++;
-      bitp++;
-    }
-    /*if (!skip_x && !skip_y) u_p--; */
-    p += I420_Y_ROWSTRIDE (overlay->width) - bitmap_width;
-    bitp += bit_rowinc;
-    skip_y = !skip_y;
-    u_p += skip_y ? uv_rowinc : 0;
-  }
-}
-
-static void
-gst_text_overlay_resize_bitmap (GstTextOverlay * overlay, gint width,
-    gint 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;
-  }
-  overlay->bitmap_buffer_size = size;
-  bitmap->buffer = g_realloc (bitmap->buffer, size);
-  memset (bitmap->buffer, 0, size);
-  bitmap->rows = height;
-  bitmap->width = width;
-  bitmap->pitch = pitch;
-}
-
-static void
-gst_text_overlay_render_text (GstTextOverlay * overlay,
-    const gchar * text, gint textlen)
-{
-  PangoRectangle ink_rect, logical_rect;
-  gchar *string;
-
-  if (textlen < 0)
-    textlen = strlen (text);
-
-  string = g_strndup (text, textlen);
-  g_strdelimit (string, "\n\r\t", ' ');
-  textlen = strlen (string);
-
-  /* FIXME: should we check for UTF-8 here? */
-
-  if (!overlay->need_render) {
-    GST_DEBUG ("Using previously rendered text.");
-    return;
-  }
-
-  GST_DEBUG ("Rendering '%s'", string);
-  pango_layout_set_markup (overlay->layout, string, textlen);
-
-  pango_layout_get_pixel_extents (overlay->layout, &ink_rect, &logical_rect);
-  gst_text_overlay_resize_bitmap (overlay, ink_rect.width,
-      ink_rect.height + ink_rect.y);
-  pango_ft2_render_layout (&overlay->bitmap, overlay->layout, -ink_rect.x, 0);
-  overlay->baseline_y = ink_rect.y;
-
-  g_free (string);
-
-  overlay->need_render = FALSE;
-}
-
-static GstFlowReturn
-gst_text_overlay_push_frame (GstTextOverlay * overlay, GstBuffer * video_frame)
-{
-  gint xpos, ypos;
-
-  video_frame = gst_buffer_make_writable (video_frame);
-
-  switch (overlay->halign) {
-    case GST_TEXT_OVERLAY_HALIGN_LEFT:
-      xpos = overlay->xpad;
-      break;
-    case GST_TEXT_OVERLAY_HALIGN_CENTER:
-      xpos = (overlay->width - overlay->bitmap.width) / 2;
-      break;
-    case GST_TEXT_OVERLAY_HALIGN_RIGHT:
-      xpos = overlay->width - overlay->bitmap.width - overlay->xpad;
-      break;
-    default:
-      xpos = 0;
-  }
-  xpos += overlay->deltax;
-
-
-  switch (overlay->valign) {
-    case GST_TEXT_OVERLAY_VALIGN_BOTTOM:
-      ypos = overlay->height - overlay->bitmap.rows - overlay->ypad;
-      break;
-    case GST_TEXT_OVERLAY_VALIGN_BASELINE:
-      ypos = overlay->height - (overlay->bitmap.rows + overlay->ypad);
-      break;
-    case GST_TEXT_OVERLAY_VALIGN_TOP:
-      ypos = overlay->ypad;
-      break;
-    default:
-      ypos = overlay->ypad;
-      break;
-  }
-  ypos += overlay->deltay;
-
-  /* shaded background box */
-  if (overlay->want_shading) {
-    gst_text_overlay_shade_y (overlay,
-        GST_BUFFER_DATA (video_frame),
-        I420_Y_ROWSTRIDE (overlay->width),
-        xpos, xpos + overlay->bitmap.width, ypos, ypos + overlay->bitmap.rows);
-  }
-
-
-  if (overlay->bitmap.buffer) {
-    gst_text_overlay_blit_yuv420 (overlay, &overlay->bitmap,
-        GST_BUFFER_DATA (video_frame), xpos, ypos);
-  }
-
-  return gst_pad_push (overlay->srcpad, video_frame);
-}
-
-static void
-gst_text_overlay_pop_video (GstTextOverlay * overlay)
-{
-  GstBuffer *buf;
-
-  buf = gst_collect_pads_pop (overlay->collect, overlay->video_collect_data);
-  g_return_if_fail (buf != NULL);
-  gst_buffer_unref (buf);
-}
-
-static void
-gst_text_overlay_pop_text (GstTextOverlay * overlay)
-{
-  GstBuffer *buf;
-
-  if (overlay->text_collect_data) {
-    buf = gst_collect_pads_pop (overlay->collect, overlay->text_collect_data);
-    g_return_if_fail (buf != NULL);
-    gst_buffer_unref (buf);
-  }
-
-  overlay->need_render = TRUE;
-}
-
-/* This function is called when there is data on all pads */
-static GstFlowReturn
-gst_text_overlay_collected (GstCollectPads * pads, gpointer data)
-{
-  GstTextOverlayClass *klass;
-  GstTextOverlay *overlay;
-  GstFlowReturn ret = GST_FLOW_OK;
-  GstClockTime now, txt_end, frame_end;
-  GstBuffer *video_frame = NULL;
-  GstBuffer *text_buf = NULL;
-  gchar *text;
-  gint text_len;
-
-  overlay = GST_TEXT_OVERLAY (data);
-  klass = GST_TEXT_OVERLAY_GET_CLASS (data);
-
-  GST_DEBUG ("Collecting");
-
-  video_frame = gst_collect_pads_peek (overlay->collect,
-      overlay->video_collect_data);
-
-  /* send EOS if video stream EOSed regardless of text stream */
-  if (video_frame == NULL) {
-    GST_DEBUG ("Video stream at EOS");
-    if (overlay->text_collect_data) {
-      text_buf = gst_collect_pads_pop (overlay->collect,
-          overlay->text_collect_data);
-    }
-    gst_pad_push_event (overlay->srcpad, gst_event_new_eos ());
-    ret = GST_FLOW_UNEXPECTED;
-    goto done;
-  }
-
-  if (GST_BUFFER_TIMESTAMP (video_frame) == GST_CLOCK_TIME_NONE) {
-    g_warning ("%s: video frame has invalid timestamp", G_STRLOC);
-  }
-
-  now = GST_BUFFER_TIMESTAMP (video_frame);
-
-  if (GST_BUFFER_DURATION (video_frame) != GST_CLOCK_TIME_NONE) {
-    frame_end = now + GST_BUFFER_DURATION (video_frame);
-  } else if (overlay->fps_n > 0) {
-    frame_end = now + gst_util_uint64_scale_int (GST_SECOND,
-        overlay->fps_d, overlay->fps_n);
-  } else {
-    /* magic value, does not really matter since texts
-     * tend to span quite a few frames in practice anyway */
-    frame_end = now + GST_SECOND / 25;
-  }
-
-  GST_DEBUG ("Got video frame: %" GST_TIME_FORMAT " - %" GST_TIME_FORMAT,
-      GST_TIME_ARGS (now), GST_TIME_ARGS (frame_end));
-
-  /* text pad not linked? */
-  if (overlay->text_collect_data == NULL) {
-    gchar *txt;
-
-    if (klass->get_text)
-      txt = klass->get_text (overlay, video_frame);
-    else
-      txt = g_strdup (overlay->default_text);
-
-    GST_DEBUG ("Text pad not linked, rendering default text: '%s'",
-        GST_STR_NULL (txt));
-    if (txt != NULL && *txt != '\0') {
-      gst_text_overlay_render_text (overlay, txt, -1);
-      ret = gst_text_overlay_push_frame (overlay, video_frame);
-    } else {
-      ret = gst_pad_push (overlay->srcpad, video_frame);
-    }
-    gst_text_overlay_pop_video (overlay);
-    video_frame = NULL;
-    goto done;
-  }
-
-  text_buf = gst_collect_pads_peek (overlay->collect,
-      overlay->text_collect_data);
-
-  /* just push the video frame if the text stream has EOSed */
-  if (text_buf == NULL) {
-    GST_DEBUG ("Text pad EOSed, just pushing video frame as is");
-    ret = gst_pad_push (overlay->srcpad, video_frame);
-    gst_text_overlay_pop_video (overlay);
-    video_frame = NULL;
-    goto done;
-  }
-
-  /* if the text buffer isn't stamped right, pop it off the
-   *  queue and display it for the current video frame only */
-  if (GST_BUFFER_TIMESTAMP (text_buf) == GST_CLOCK_TIME_NONE ||
-      GST_BUFFER_DURATION (text_buf) == GST_CLOCK_TIME_NONE) {
-    GST_WARNING ("Got text buffer with invalid time stamp or duration");
-    gst_text_overlay_pop_text (overlay);
-    GST_BUFFER_TIMESTAMP (text_buf) = now;
-    GST_BUFFER_DURATION (text_buf) = frame_end - now;
-  }
-
-  txt_end = GST_BUFFER_TIMESTAMP (text_buf) + GST_BUFFER_DURATION (text_buf);
-
-  GST_DEBUG ("Got text buffer: %" GST_TIME_FORMAT " - %" GST_TIME_FORMAT,
-      GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (text_buf)), GST_TIME_ARGS (txt_end));
-
-  /* if the text buffer is too old, pop it off the
-   * queue and return so we get a new one next time */
-  if (txt_end < now) {
-    GST_DEBUG ("Text buffer too old, popping off the queue");
-    gst_text_overlay_pop_text (overlay);
-    ret = GST_FLOW_OK;
-    goto done;
-  }
-
-  /* if the video frame ends before the text even starts,
-   * just push it out as is and pop it off the queue */
-  if (frame_end < GST_BUFFER_TIMESTAMP (text_buf)) {
-    GST_DEBUG ("Video buffer before text, pushing out and popping off queue");
-    ret = gst_pad_push (overlay->srcpad, video_frame);
-    gst_text_overlay_pop_video (overlay);
-    video_frame = NULL;
-    goto done;
-  }
-
-  /* text duration overlaps video frame duration */
-  text = g_strndup ((gchar *) GST_BUFFER_DATA (text_buf),
-      GST_BUFFER_SIZE (text_buf));
-  g_strdelimit (text, "\n\r\t", ' ');
-  text_len = strlen (text);
-
-  if (text_len > 0) {
-    GST_DEBUG ("Rendering text '%*s'", text_len, text);;
-    gst_text_overlay_render_text (overlay, text, text_len);
-  } else {
-    GST_DEBUG ("No text to render (empty buffer)");
-    gst_text_overlay_render_text (overlay, " ", 1);
-  }
-
-  g_free (text);
-
-  gst_text_overlay_pop_video (overlay);
-  ret = gst_text_overlay_push_frame (overlay, video_frame);
-  video_frame = NULL;
-  goto done;
-
-done:
-  {
-    if (text_buf)
-      gst_buffer_unref (text_buf);
-
-    if (video_frame)
-      gst_buffer_unref (video_frame);
-
-    return ret;
-  }
-}
-
-static GstStateChangeReturn
-gst_text_overlay_change_state (GstElement * element, GstStateChange transition)
-{
-  GstStateChangeReturn ret = GST_STATE_CHANGE_SUCCESS;
-  GstTextOverlay *overlay = GST_TEXT_OVERLAY (element);
-
-  switch (transition) {
-    case GST_STATE_CHANGE_READY_TO_PAUSED:
-      gst_collect_pads_start (overlay->collect);
-      break;
-    case GST_STATE_CHANGE_PAUSED_TO_READY:
-      /* need to unblock the collectpads before calling the
-       * parent change_state so that streaming can finish */
-      gst_collect_pads_stop (overlay->collect);
-      break;
-    default:
-      break;
-  }
-
-  ret = parent_class->change_state (element, transition);
-  if (ret == GST_STATE_CHANGE_FAILURE)
-    return ret;
-
-  switch (transition) {
-    default:
-      break;
-  }
-
-  return ret;
-}
-
-static gboolean
-plugin_init (GstPlugin * plugin)
-{
-  if (!gst_element_register (plugin, "textoverlay", GST_RANK_NONE,
-          GST_TYPE_TEXT_OVERLAY) ||
-      !gst_element_register (plugin, "timeoverlay", GST_RANK_NONE,
-          GST_TYPE_TIME_OVERLAY) ||
-      !gst_element_register (plugin, "clockoverlay", GST_RANK_NONE,
-          GST_TYPE_CLOCK_OVERLAY) ||
-      !gst_element_register (plugin, "textrender", GST_RANK_NONE,
-          GST_TYPE_TEXT_RENDER)) {
-    return FALSE;
-  }
-
-  /*texttestsrc_plugin_init(module, plugin); */
-
-  GST_DEBUG_CATEGORY_INIT (pango_debug, "pango", 0, "Pango elements");
-
-  return TRUE;
-}
-
-GST_PLUGIN_DEFINE (GST_VERSION_MAJOR, GST_VERSION_MINOR,
-    "pango", "Pango-based text rendering and overlay", plugin_init,
-    VERSION, GST_LICENSE, GST_PACKAGE_NAME, GST_PACKAGE_ORIGIN)