gst/smpte/gstsmpte.c - mtk-gst-plugins-good - Git at Google

 /* GStreamer
  * Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
  *
  * 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., 51 Franklin St, Fifth Floor,
  * Boston, MA 02110-1301, USA.
  */

 /**
  * SECTION:element-smpte
  *
  * smpte can accept I420 video streams with the same width, height and
  * framerate. The two incomming buffers are blended together using an effect
  * specific alpha mask.
  *
  * The #GstSmpte:depth property defines the presision in bits of the mask. A
  * higher presision will create a mask with smoother gradients in order to avoid
  * banding.
  *
  * <refsect2>
  * <title>Sample pipelines</title>
  * |[
  * gst-launch-1.0 -v videotestsrc pattern=1 ! smpte name=s border=20000 type=234 duration=2000000000 ! videoconvert ! ximagesink videotestsrc ! s.
  * ]| A pipeline to demonstrate the smpte transition.
  * It shows a pinwheel transition a from a snow videotestsrc to an smpte
  * pattern videotestsrc. The transition will take 2 seconds to complete. The
  * edges of the transition are smoothed with a 20000 big border.
  * </refsect2>
  */

 #ifdef HAVE_CONFIG_H
 #include "config.h"
 #endif
 #include <string.h>
 #include "gstsmpte.h"
 #include "paint.h"

 GST_DEBUG_CATEGORY_STATIC (gst_smpte_debug);
 #define GST_CAT_DEFAULT gst_smpte_debug

 static GstStaticPadTemplate gst_smpte_src_template =
 GST_STATIC_PAD_TEMPLATE ("src",
     GST_PAD_SRC,
     GST_PAD_ALWAYS,
     GST_STATIC_CAPS (GST_VIDEO_CAPS_MAKE ("I420")
     )
     );

 static GstStaticPadTemplate gst_smpte_sink1_template =
 GST_STATIC_PAD_TEMPLATE ("sink1",
     GST_PAD_SINK,
     GST_PAD_ALWAYS,
     GST_STATIC_CAPS (GST_VIDEO_CAPS_MAKE ("I420")
     )
     );

 static GstStaticPadTemplate gst_smpte_sink2_template =
 GST_STATIC_PAD_TEMPLATE ("sink2",
     GST_PAD_SINK,
     GST_PAD_ALWAYS,
     GST_STATIC_CAPS (GST_VIDEO_CAPS_MAKE ("I420")
     )
     );


 /* SMPTE signals and args */
 enum
 {
   /* FILL ME */
   LAST_SIGNAL
 };

 #define DEFAULT_PROP_TYPE	1
 #define DEFAULT_PROP_BORDER	0
 #define DEFAULT_PROP_DEPTH	16
 #define DEFAULT_PROP_DURATION	GST_SECOND
 #define DEFAULT_PROP_INVERT   FALSE

 enum
 {
   PROP_0,
   PROP_TYPE,
   PROP_BORDER,
   PROP_DEPTH,
   PROP_DURATION,
   PROP_INVERT
 };

 #define GST_TYPE_SMPTE_TRANSITION_TYPE (gst_smpte_transition_type_get_type())
 static GType
 gst_smpte_transition_type_get_type (void)
 {
   static GType smpte_transition_type = 0;
   GEnumValue *smpte_transitions;

   if (!smpte_transition_type) {
     const GList *definitions;
     gint i = 0;

     definitions = gst_mask_get_definitions ();
     smpte_transitions =
         g_new0 (GEnumValue, g_list_length ((GList *) definitions) + 1);

     while (definitions) {
       GstMaskDefinition *definition = (GstMaskDefinition *) definitions->data;

       definitions = g_list_next (definitions);

       smpte_transitions[i].value = definition->type;
       /* older GLib versions have the two fields as non-const, hence the cast */
       smpte_transitions[i].value_nick = (gchar *) definition->short_name;
       smpte_transitions[i].value_name = (gchar *) definition->long_name;

       i++;
     }

     smpte_transition_type =
         g_enum_register_static ("GstSMPTETransitionType", smpte_transitions);
   }
   return smpte_transition_type;
 }


 static void gst_smpte_finalize (GstSMPTE * smpte);

 static GstFlowReturn gst_smpte_collected (GstCollectPads * pads,
     GstSMPTE * smpte);

 static void gst_smpte_set_property (GObject * object, guint prop_id,
     const GValue * value, GParamSpec * pspec);
 static void gst_smpte_get_property (GObject * object, guint prop_id,
     GValue * value, GParamSpec * pspec);

 static GstStateChangeReturn gst_smpte_change_state (GstElement * element,
     GstStateChange transition);

 /*static guint gst_smpte_signals[LAST_SIGNAL] = { 0 }; */

 #define gst_smpte_parent_class parent_class
 G_DEFINE_TYPE (GstSMPTE, gst_smpte, GST_TYPE_ELEMENT);

 static void
 gst_smpte_class_init (GstSMPTEClass * 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->set_property = gst_smpte_set_property;
   gobject_class->get_property = gst_smpte_get_property;
   gobject_class->finalize = (GObjectFinalizeFunc) gst_smpte_finalize;

   _gst_mask_init ();

   g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_TYPE,
       g_param_spec_enum ("type", "Type", "The type of transition to use",
           GST_TYPE_SMPTE_TRANSITION_TYPE, DEFAULT_PROP_TYPE,
           G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
   g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_BORDER,
       g_param_spec_int ("border", "Border",
           "The border width of the transition", 0, G_MAXINT,
           DEFAULT_PROP_BORDER, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
   g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_DEPTH,
       g_param_spec_int ("depth", "Depth", "Depth of the mask in bits", 1, 24,
           DEFAULT_PROP_DEPTH, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
   g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_DURATION,
       g_param_spec_uint64 ("duration", "Duration",
           "Duration of the transition effect in nanoseconds", 0, G_MAXUINT64,
           DEFAULT_PROP_DURATION, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
   g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_INVERT,
       g_param_spec_boolean ("invert", "Invert",
           "Invert transition mask", DEFAULT_PROP_INVERT,
           G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));

   gstelement_class->change_state = GST_DEBUG_FUNCPTR (gst_smpte_change_state);

   gst_element_class_add_static_pad_template (gstelement_class,
       &gst_smpte_sink1_template);
   gst_element_class_add_static_pad_template (gstelement_class,
       &gst_smpte_sink2_template);
   gst_element_class_add_static_pad_template (gstelement_class,
       &gst_smpte_src_template);
   gst_element_class_set_static_metadata (gstelement_class, "SMPTE transitions",
       "Filter/Editor/Video",
       "Apply the standard SMPTE transitions on video images",
       "Wim Taymans <wim.taymans@chello.be>");
 }

 /*                              wht  yel  cya  grn  mag  red  blu  blk   -I    Q */
 static const int y_colors[] = { 255, 226, 179, 150, 105, 76, 29, 16, 16, 0 };
 static const int u_colors[] = { 128, 0, 170, 46, 212, 85, 255, 128, 0, 128 };
 static const int v_colors[] = { 128, 155, 0, 21, 235, 255, 107, 128, 128, 255 };

 static void
 fill_i420 (GstVideoInfo * vinfo, guint8 * data, gint height, gint color)
 {
   gint size = GST_VIDEO_INFO_COMP_STRIDE (vinfo, 0) * GST_ROUND_UP_2 (height);
   gint size4 = size >> 2;
   guint8 *yp = data;
   guint8 *up = data + GST_VIDEO_INFO_COMP_OFFSET (vinfo, 1);
   guint8 *vp = data + GST_VIDEO_INFO_COMP_OFFSET (vinfo, 2);

   memset (yp, y_colors[color], size);
   memset (up, u_colors[color], size4);
   memset (vp, v_colors[color], size4);
 }

 static gboolean
 gst_smpte_update_mask (GstSMPTE * smpte, gint type, gboolean invert,
     gint depth, gint width, gint height)
 {
   GstMask *newmask;

   if (smpte->mask) {
     if (smpte->type == type &&
         smpte->invert == invert &&
         smpte->depth == depth &&
         smpte->width == width && smpte->height == height)
       return TRUE;
   }

   newmask = gst_mask_factory_new (type, invert, depth, width, height);
   if (newmask) {
     if (smpte->mask) {
       gst_mask_destroy (smpte->mask);
     }
     smpte->mask = newmask;
     smpte->type = type;
     smpte->invert = invert;
     smpte->depth = depth;
     smpte->width = width;
     smpte->height = height;

     return TRUE;
   }
   return FALSE;
 }

 static gboolean
 gst_smpte_setcaps (GstPad * pad, GstCaps * caps)
 {
   GstSMPTE *smpte;
   gboolean ret;
   GstVideoInfo vinfo;

   smpte = GST_SMPTE (GST_PAD_PARENT (pad));

   gst_video_info_init (&vinfo);
   if (!gst_video_info_from_caps (&vinfo, caps))
     return FALSE;

   smpte->width = GST_VIDEO_INFO_WIDTH (&vinfo);
   smpte->height = GST_VIDEO_INFO_HEIGHT (&vinfo);
   smpte->fps_num = GST_VIDEO_INFO_FPS_N (&vinfo);
   smpte->fps_denom = GST_VIDEO_INFO_FPS_D (&vinfo);

   /* figure out the duration in frames */
   smpte->end_position = gst_util_uint64_scale (smpte->duration,
       smpte->fps_num, GST_SECOND * smpte->fps_denom);

   GST_DEBUG_OBJECT (smpte, "duration: %d frames", smpte->end_position);

   ret =
       gst_smpte_update_mask (smpte, smpte->type, smpte->invert, smpte->depth,
       smpte->width, smpte->height);

   if (pad == smpte->sinkpad1) {
     GST_DEBUG_OBJECT (smpte, "setting pad1 info");
     smpte->vinfo1 = vinfo;
   } else {
     GST_DEBUG_OBJECT (smpte, "setting pad2 info");
     smpte->vinfo2 = vinfo;
   }

   return ret;
 }

 static gboolean
 gst_smpte_sink_event (GstCollectPads * pads,
     GstCollectData * data, GstEvent * event, gpointer user_data)
 {
   GstPad *pad;
   gboolean ret = FALSE;

   pad = data->pad;

   switch (GST_EVENT_TYPE (event)) {
     case GST_EVENT_CAPS:
     {
       GstCaps *caps;

       gst_event_parse_caps (event, &caps);
       ret = gst_smpte_setcaps (pad, caps);
       gst_event_unref (event);
       event = NULL;
       break;
     }
     default:
       break;
   }

   if (event != NULL)
     return gst_collect_pads_event_default (pads, data, event, FALSE);

   return ret;
 }

 static void
 gst_smpte_init (GstSMPTE * smpte)
 {
   smpte->sinkpad1 =
       gst_pad_new_from_static_template (&gst_smpte_sink1_template, "sink1");
   GST_PAD_SET_PROXY_CAPS (smpte->sinkpad1);
   gst_element_add_pad (GST_ELEMENT (smpte), smpte->sinkpad1);

   smpte->sinkpad2 =
       gst_pad_new_from_static_template (&gst_smpte_sink2_template, "sink2");
   GST_PAD_SET_PROXY_CAPS (smpte->sinkpad2);
   gst_element_add_pad (GST_ELEMENT (smpte), smpte->sinkpad2);

   smpte->srcpad =
       gst_pad_new_from_static_template (&gst_smpte_src_template, "src");
   gst_element_add_pad (GST_ELEMENT (smpte), smpte->srcpad);

   smpte->collect = gst_collect_pads_new ();
   gst_collect_pads_set_function (smpte->collect,
       (GstCollectPadsFunction) GST_DEBUG_FUNCPTR (gst_smpte_collected), smpte);
   gst_collect_pads_set_event_function (smpte->collect,
       GST_DEBUG_FUNCPTR (gst_smpte_sink_event), smpte);

   gst_collect_pads_add_pad (smpte->collect, smpte->sinkpad1,
       sizeof (GstCollectData), NULL, TRUE);
   gst_collect_pads_add_pad (smpte->collect, smpte->sinkpad2,
       sizeof (GstCollectData), NULL, TRUE);

   smpte->type = DEFAULT_PROP_TYPE;
   smpte->border = DEFAULT_PROP_BORDER;
   smpte->depth = DEFAULT_PROP_DEPTH;
   smpte->duration = DEFAULT_PROP_DURATION;
   smpte->invert = DEFAULT_PROP_INVERT;
   smpte->fps_num = 0;
   smpte->fps_denom = 1;
 }

 static void
 gst_smpte_finalize (GstSMPTE * smpte)
 {
   if (smpte->collect) {
     gst_object_unref (smpte->collect);
   }
   if (smpte->mask) {
     gst_mask_destroy (smpte->mask);
   }

   G_OBJECT_CLASS (parent_class)->finalize ((GObject *) smpte);
 }

 static void
 gst_smpte_reset (GstSMPTE * smpte)
 {
   smpte->width = -1;
   smpte->height = -1;
   smpte->position = 0;
   smpte->end_position = 0;
   smpte->send_stream_start = TRUE;
 }

 static void
 gst_smpte_blend_i420 (GstVideoFrame * frame1, GstVideoFrame * frame2,
     GstVideoFrame * oframe, GstMask * mask, gint border, gint pos)
 {
   guint32 *maskp;
   gint value;
   gint i, j;
   gint min, max;
   guint8 *in1, *in2, *out, *in1u, *in1v, *in2u, *in2v, *outu, *outv;
   gint width, height;

   if (border == 0)
     border++;

   min = pos - border;
   max = pos;

   width = GST_VIDEO_FRAME_WIDTH (frame1);
   height = GST_VIDEO_FRAME_HEIGHT (frame1);

   in1 = GST_VIDEO_FRAME_COMP_DATA (frame1, 0);
   in2 = GST_VIDEO_FRAME_COMP_DATA (frame2, 0);
   out = GST_VIDEO_FRAME_COMP_DATA (oframe, 0);

   in1u = GST_VIDEO_FRAME_COMP_DATA (frame1, 1);
   in1v = GST_VIDEO_FRAME_COMP_DATA (frame1, 2);
   in2u = GST_VIDEO_FRAME_COMP_DATA (frame2, 1);
   in2v = GST_VIDEO_FRAME_COMP_DATA (frame2, 2);
   outu = GST_VIDEO_FRAME_COMP_DATA (oframe, 1);
   outv = GST_VIDEO_FRAME_COMP_DATA (oframe, 2);

   maskp = mask->data;

   for (i = 0; i < height; i++) {
     for (j = 0; j < width; j++) {
       value = *maskp++;
       value = ((CLAMP (value, min, max) - min) << 8) / border;

       out[j] = ((in1[j] * value) + (in2[j] * (256 - value))) >> 8;
       if (!(i & 1) && !(j & 1)) {
         outu[j / 2] =
             ((in1u[j / 2] * value) + (in2u[j / 2] * (256 - value))) >> 8;
         outv[j / 2] =
             ((in1v[j / 2] * value) + (in2v[j / 2] * (256 - value))) >> 8;
       }
     }

     in1 += GST_VIDEO_FRAME_COMP_STRIDE (frame1, 0);
     in2 += GST_VIDEO_FRAME_COMP_STRIDE (frame2, 0);
     out += GST_VIDEO_FRAME_COMP_STRIDE (oframe, 0);

     if (!(i & 1)) {
       in1u += GST_VIDEO_FRAME_COMP_STRIDE (frame1, 1);
       in2u += GST_VIDEO_FRAME_COMP_STRIDE (frame2, 1);
       in1v += GST_VIDEO_FRAME_COMP_STRIDE (frame1, 2);
       in2v += GST_VIDEO_FRAME_COMP_STRIDE (frame1, 2);
       outu += GST_VIDEO_FRAME_COMP_STRIDE (oframe, 1);
       outv += GST_VIDEO_FRAME_COMP_STRIDE (oframe, 2);
     }
   }
 }

 static GstFlowReturn
 gst_smpte_collected (GstCollectPads * pads, GstSMPTE * smpte)
 {
   GstBuffer *outbuf;
   GstClockTime ts;
   GstBuffer *in1 = NULL, *in2 = NULL;
   GSList *collected;
   GstMapInfo map;
   GstVideoFrame frame1, frame2, oframe;

   if (G_UNLIKELY (smpte->fps_num == 0))
     goto not_negotiated;

   if (!gst_pad_has_current_caps (smpte->sinkpad1) ||
       !gst_pad_has_current_caps (smpte->sinkpad2))
     goto not_negotiated;

   if (!gst_video_info_is_equal (&smpte->vinfo1, &smpte->vinfo2))
     goto input_formats_do_not_match;

   if (smpte->send_stream_start) {
     gchar s_id[32];

     /* stream-start (FIXME: create id based on input ids) */
     g_snprintf (s_id, sizeof (s_id), "smpte-%08x", g_random_int ());
     gst_pad_push_event (smpte->srcpad, gst_event_new_stream_start (s_id));
     smpte->send_stream_start = FALSE;
   }

   ts = gst_util_uint64_scale_int (smpte->position * GST_SECOND,
       smpte->fps_denom, smpte->fps_num);

   for (collected = pads->data; collected; collected = g_slist_next (collected)) {
     GstCollectData *data;

     data = (GstCollectData *) collected->data;

     if (data->pad == smpte->sinkpad1)
       in1 = gst_collect_pads_pop (pads, data);
     else if (data->pad == smpte->sinkpad2)
       in2 = gst_collect_pads_pop (pads, data);
   }

   if (in1 == NULL) {
     /* if no input, make picture black */
     in1 = gst_buffer_new_and_alloc (GST_VIDEO_INFO_SIZE (&smpte->vinfo1));
     gst_buffer_map (in1, &map, GST_MAP_WRITE);
     fill_i420 (&smpte->vinfo1, map.data, smpte->height, 7);
     gst_buffer_unmap (in1, &map);
   }
   if (in2 == NULL) {
     /* if no input, make picture white */
     in2 = gst_buffer_new_and_alloc (GST_VIDEO_INFO_SIZE (&smpte->vinfo2));
     gst_buffer_map (in2, &map, GST_MAP_WRITE);
     fill_i420 (&smpte->vinfo2, map.data, smpte->height, 0);
     gst_buffer_unmap (in2, &map);
   }

   if (smpte->position < smpte->end_position) {
     outbuf = gst_buffer_new_and_alloc (GST_VIDEO_INFO_SIZE (&smpte->vinfo1));

     /* set caps if not done yet */
     if (!gst_pad_has_current_caps (smpte->srcpad)) {
       GstCaps *caps;
       GstSegment segment;

       caps = gst_video_info_to_caps (&smpte->vinfo1);

       gst_pad_set_caps (smpte->srcpad, caps);
       gst_caps_unref (caps);

       gst_segment_init (&segment, GST_FORMAT_TIME);
       gst_pad_push_event (smpte->srcpad, gst_event_new_segment (&segment));
     }

     gst_video_frame_map (&frame1, &smpte->vinfo1, in1, GST_MAP_READ);
     gst_video_frame_map (&frame2, &smpte->vinfo2, in2, GST_MAP_READ);
     /* re-use either info, now know they are essentially identical */
     gst_video_frame_map (&oframe, &smpte->vinfo1, outbuf, GST_MAP_WRITE);
     gst_smpte_blend_i420 (&frame1, &frame2, &oframe, smpte->mask, smpte->border,
         ((1 << smpte->depth) + smpte->border) *
         smpte->position / smpte->end_position);
     gst_video_frame_unmap (&frame1);
     gst_video_frame_unmap (&frame2);
     gst_video_frame_unmap (&oframe);
   } else {
     outbuf = in2;
     gst_buffer_ref (in2);
   }

   smpte->position++;

   if (in1)
     gst_buffer_unref (in1);
   if (in2)
     gst_buffer_unref (in2);

   GST_BUFFER_TIMESTAMP (outbuf) = ts;

   return gst_pad_push (smpte->srcpad, outbuf);

   /* ERRORS */
 not_negotiated:
   {
     GST_ELEMENT_ERROR (smpte, CORE, NEGOTIATION, (NULL),
         ("No input format negotiated"));
     return GST_FLOW_NOT_NEGOTIATED;
   }
 input_formats_do_not_match:
   {
     GstCaps *caps1, *caps2;

     caps1 = gst_pad_get_current_caps (smpte->sinkpad1);
     caps2 = gst_pad_get_current_caps (smpte->sinkpad2);
     GST_ELEMENT_ERROR (smpte, CORE, NEGOTIATION, (NULL),
         ("input formats don't match: %" GST_PTR_FORMAT " vs. %" GST_PTR_FORMAT,
             caps1, caps2));
     if (caps1)
       gst_caps_unref (caps1);
     if (caps2)
       gst_caps_unref (caps2);
     return GST_FLOW_ERROR;
   }
 }

 static void
 gst_smpte_set_property (GObject * object, guint prop_id,
     const GValue * value, GParamSpec * pspec)
 {
   GstSMPTE *smpte;

   smpte = GST_SMPTE (object);

   switch (prop_id) {
     case PROP_TYPE:
       smpte->type = g_value_get_enum (value);
       break;
     case PROP_BORDER:
       smpte->border = g_value_get_int (value);
       break;
     case PROP_DEPTH:
       smpte->depth = g_value_get_int (value);
       break;
     case PROP_DURATION:
       smpte->duration = g_value_get_uint64 (value);
       break;
     case PROP_INVERT:
       smpte->invert = g_value_get_boolean (value);
       break;
     default:
       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
       break;
   }
 }

 static void
 gst_smpte_get_property (GObject * object, guint prop_id,
     GValue * value, GParamSpec * pspec)
 {
   GstSMPTE *smpte;

   smpte = GST_SMPTE (object);

   switch (prop_id) {
     case PROP_TYPE:
       g_value_set_enum (value, smpte->type);
       break;
     case PROP_BORDER:
       g_value_set_int (value, smpte->border);
       break;
     case PROP_DEPTH:
       g_value_set_int (value, smpte->depth);
       break;
     case PROP_DURATION:
       g_value_set_uint64 (value, smpte->duration);
       break;
     case PROP_INVERT:
       g_value_set_boolean (value, smpte->invert);
       break;
     default:
       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
       break;
   }
 }

 static GstStateChangeReturn
 gst_smpte_change_state (GstElement * element, GstStateChange transition)
 {
   GstStateChangeReturn ret;
   GstSMPTE *smpte;

   smpte = GST_SMPTE (element);

   switch (transition) {
     case GST_STATE_CHANGE_READY_TO_PAUSED:
       gst_smpte_reset (smpte);
       GST_LOG_OBJECT (smpte, "starting collectpads");
       gst_collect_pads_start (smpte->collect);
       break;
     case GST_STATE_CHANGE_PAUSED_TO_READY:
       GST_LOG_OBJECT (smpte, "stopping collectpads");
       gst_collect_pads_stop (smpte->collect);
       break;
     default:
       break;
   }

   ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);

   switch (transition) {
     case GST_STATE_CHANGE_PAUSED_TO_READY:
       gst_smpte_reset (smpte);
       break;
     default:
       break;
   }
   return ret;
 }

 gboolean
 gst_smpte_plugin_init (GstPlugin * plugin)
 {
   GST_DEBUG_CATEGORY_INIT (gst_smpte_debug, "smpte", 0,
       "SMPTE transition effect");

   return gst_element_register (plugin, "smpte", GST_RANK_NONE, GST_TYPE_SMPTE);
 }
	/* GStreamer
	* Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
	*
	* 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., 51 Franklin St, Fifth Floor,
	* Boston, MA 02110-1301, USA.
	*/

	/**
	* SECTION:element-smpte
	*
	* smpte can accept I420 video streams with the same width, height and
	* framerate. The two incomming buffers are blended together using an effect
	* specific alpha mask.
	*
	* The #GstSmpte:depth property defines the presision in bits of the mask. A
	* higher presision will create a mask with smoother gradients in order to avoid
	* banding.
	*
	* <refsect2>
	* <title>Sample pipelines</title>
	* \|[
	* gst-launch-1.0 -v videotestsrc pattern=1 ! smpte name=s border=20000 type=234 duration=2000000000 ! videoconvert ! ximagesink videotestsrc ! s.
	* ]\| A pipeline to demonstrate the smpte transition.
	* It shows a pinwheel transition a from a snow videotestsrc to an smpte
	* pattern videotestsrc. The transition will take 2 seconds to complete. The
	* edges of the transition are smoothed with a 20000 big border.
	* </refsect2>
	*/

	#ifdef HAVE_CONFIG_H
	#include "config.h"
	#endif
	#include <string.h>
	#include "gstsmpte.h"
	#include "paint.h"

	GST_DEBUG_CATEGORY_STATIC (gst_smpte_debug);
	#define GST_CAT_DEFAULT gst_smpte_debug

	static GstStaticPadTemplate gst_smpte_src_template =
	GST_STATIC_PAD_TEMPLATE ("src",
	GST_PAD_SRC,
	GST_PAD_ALWAYS,
	GST_STATIC_CAPS (GST_VIDEO_CAPS_MAKE ("I420")
	)
	);

	static GstStaticPadTemplate gst_smpte_sink1_template =
	GST_STATIC_PAD_TEMPLATE ("sink1",
	GST_PAD_SINK,
	GST_PAD_ALWAYS,
	GST_STATIC_CAPS (GST_VIDEO_CAPS_MAKE ("I420")
	)
	);

	static GstStaticPadTemplate gst_smpte_sink2_template =
	GST_STATIC_PAD_TEMPLATE ("sink2",
	GST_PAD_SINK,
	GST_PAD_ALWAYS,
	GST_STATIC_CAPS (GST_VIDEO_CAPS_MAKE ("I420")
	)
	);


	/* SMPTE signals and args */
	enum
	{
	/* FILL ME */
	LAST_SIGNAL
	};

	#define DEFAULT_PROP_TYPE 1
	#define DEFAULT_PROP_BORDER 0
	#define DEFAULT_PROP_DEPTH 16
	#define DEFAULT_PROP_DURATION GST_SECOND
	#define DEFAULT_PROP_INVERT FALSE

	enum
	{
	PROP_0,
	PROP_TYPE,
	PROP_BORDER,
	PROP_DEPTH,
	PROP_DURATION,
	PROP_INVERT
	};

	#define GST_TYPE_SMPTE_TRANSITION_TYPE (gst_smpte_transition_type_get_type())
	static GType
	gst_smpte_transition_type_get_type (void)
	{
	static GType smpte_transition_type = 0;
	GEnumValue *smpte_transitions;

	if (!smpte_transition_type) {
	const GList *definitions;
	gint i = 0;

	definitions = gst_mask_get_definitions ();
	smpte_transitions =
	g_new0 (GEnumValue, g_list_length ((GList *) definitions) + 1);

	while (definitions) {
	GstMaskDefinition definition = (GstMaskDefinition ) definitions->data;

	definitions = g_list_next (definitions);

	smpte_transitions[i].value = definition->type;
	/* older GLib versions have the two fields as non-const, hence the cast */
	smpte_transitions[i].value_nick = (gchar *) definition->short_name;
	smpte_transitions[i].value_name = (gchar *) definition->long_name;

	i++;
	}

	smpte_transition_type =
	g_enum_register_static ("GstSMPTETransitionType", smpte_transitions);
	}
	return smpte_transition_type;
	}


	static void gst_smpte_finalize (GstSMPTE * smpte);

	static GstFlowReturn gst_smpte_collected (GstCollectPads * pads,
	GstSMPTE * smpte);

	static void gst_smpte_set_property (GObject * object, guint prop_id,
	const GValue * value, GParamSpec * pspec);
	static void gst_smpte_get_property (GObject * object, guint prop_id,
	GValue * value, GParamSpec * pspec);

	static GstStateChangeReturn gst_smpte_change_state (GstElement * element,
	GstStateChange transition);

	/static guint gst_smpte_signals[LAST_SIGNAL] = { 0 }; /

	#define gst_smpte_parent_class parent_class
	G_DEFINE_TYPE (GstSMPTE, gst_smpte, GST_TYPE_ELEMENT);

	static void
	gst_smpte_class_init (GstSMPTEClass * 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->set_property = gst_smpte_set_property;
	gobject_class->get_property = gst_smpte_get_property;
	gobject_class->finalize = (GObjectFinalizeFunc) gst_smpte_finalize;

	_gst_mask_init ();

	g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_TYPE,
	g_param_spec_enum ("type", "Type", "The type of transition to use",
	GST_TYPE_SMPTE_TRANSITION_TYPE, DEFAULT_PROP_TYPE,
	G_PARAM_READWRITE \| G_PARAM_STATIC_STRINGS));
	g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_BORDER,
	g_param_spec_int ("border", "Border",
	"The border width of the transition", 0, G_MAXINT,
	DEFAULT_PROP_BORDER, G_PARAM_READWRITE \| G_PARAM_STATIC_STRINGS));
	g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_DEPTH,
	g_param_spec_int ("depth", "Depth", "Depth of the mask in bits", 1, 24,
	DEFAULT_PROP_DEPTH, G_PARAM_READWRITE \| G_PARAM_STATIC_STRINGS));
	g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_DURATION,
	g_param_spec_uint64 ("duration", "Duration",
	"Duration of the transition effect in nanoseconds", 0, G_MAXUINT64,
	DEFAULT_PROP_DURATION, G_PARAM_READWRITE \| G_PARAM_STATIC_STRINGS));
	g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_INVERT,
	g_param_spec_boolean ("invert", "Invert",
	"Invert transition mask", DEFAULT_PROP_INVERT,
	G_PARAM_READWRITE \| G_PARAM_STATIC_STRINGS));

	gstelement_class->change_state = GST_DEBUG_FUNCPTR (gst_smpte_change_state);

	gst_element_class_add_static_pad_template (gstelement_class,
	&gst_smpte_sink1_template);
	gst_element_class_add_static_pad_template (gstelement_class,
	&gst_smpte_sink2_template);
	gst_element_class_add_static_pad_template (gstelement_class,
	&gst_smpte_src_template);
	gst_element_class_set_static_metadata (gstelement_class, "SMPTE transitions",
	"Filter/Editor/Video",
	"Apply the standard SMPTE transitions on video images",
	"Wim Taymans <wim.taymans@chello.be>");
	}

	/* wht yel cya grn mag red blu blk -I Q */
	static const int y_colors[] = { 255, 226, 179, 150, 105, 76, 29, 16, 16, 0 };
	static const int u_colors[] = { 128, 0, 170, 46, 212, 85, 255, 128, 0, 128 };
	static const int v_colors[] = { 128, 155, 0, 21, 235, 255, 107, 128, 128, 255 };

	static void
	fill_i420 (GstVideoInfo * vinfo, guint8 * data, gint height, gint color)
	{
	gint size = GST_VIDEO_INFO_COMP_STRIDE (vinfo, 0) * GST_ROUND_UP_2 (height);
	gint size4 = size >> 2;
	guint8 *yp = data;
	guint8 *up = data + GST_VIDEO_INFO_COMP_OFFSET (vinfo, 1);
	guint8 *vp = data + GST_VIDEO_INFO_COMP_OFFSET (vinfo, 2);

	memset (yp, y_colors[color], size);
	memset (up, u_colors[color], size4);
	memset (vp, v_colors[color], size4);
	}

	static gboolean
	gst_smpte_update_mask (GstSMPTE * smpte, gint type, gboolean invert,
	gint depth, gint width, gint height)
	{
	GstMask *newmask;

	if (smpte->mask) {
	if (smpte->type == type &&
	smpte->invert == invert &&
	smpte->depth == depth &&
	smpte->width == width && smpte->height == height)
	return TRUE;
	}

	newmask = gst_mask_factory_new (type, invert, depth, width, height);
	if (newmask) {
	if (smpte->mask) {
	gst_mask_destroy (smpte->mask);
	}
	smpte->mask = newmask;
	smpte->type = type;
	smpte->invert = invert;
	smpte->depth = depth;
	smpte->width = width;
	smpte->height = height;

	return TRUE;
	}
	return FALSE;
	}

	static gboolean
	gst_smpte_setcaps (GstPad * pad, GstCaps * caps)
	{
	GstSMPTE *smpte;
	gboolean ret;
	GstVideoInfo vinfo;

	smpte = GST_SMPTE (GST_PAD_PARENT (pad));

	gst_video_info_init (&vinfo);
	if (!gst_video_info_from_caps (&vinfo, caps))
	return FALSE;

	smpte->width = GST_VIDEO_INFO_WIDTH (&vinfo);
	smpte->height = GST_VIDEO_INFO_HEIGHT (&vinfo);
	smpte->fps_num = GST_VIDEO_INFO_FPS_N (&vinfo);
	smpte->fps_denom = GST_VIDEO_INFO_FPS_D (&vinfo);

	/* figure out the duration in frames */
	smpte->end_position = gst_util_uint64_scale (smpte->duration,
	smpte->fps_num, GST_SECOND * smpte->fps_denom);

	GST_DEBUG_OBJECT (smpte, "duration: %d frames", smpte->end_position);

	ret =
	gst_smpte_update_mask (smpte, smpte->type, smpte->invert, smpte->depth,
	smpte->width, smpte->height);

	if (pad == smpte->sinkpad1) {
	GST_DEBUG_OBJECT (smpte, "setting pad1 info");
	smpte->vinfo1 = vinfo;
	} else {
	GST_DEBUG_OBJECT (smpte, "setting pad2 info");
	smpte->vinfo2 = vinfo;
	}

	return ret;
	}

	static gboolean
	gst_smpte_sink_event (GstCollectPads * pads,
	GstCollectData * data, GstEvent * event, gpointer user_data)
	{
	GstPad *pad;
	gboolean ret = FALSE;

	pad = data->pad;

	switch (GST_EVENT_TYPE (event)) {
	case GST_EVENT_CAPS:
	{
	GstCaps *caps;

	gst_event_parse_caps (event, &caps);
	ret = gst_smpte_setcaps (pad, caps);
	gst_event_unref (event);
	event = NULL;
	break;
	}
	default:
	break;
	}

	if (event != NULL)
	return gst_collect_pads_event_default (pads, data, event, FALSE);

	return ret;
	}

	static void
	gst_smpte_init (GstSMPTE * smpte)
	{
	smpte->sinkpad1 =
	gst_pad_new_from_static_template (&gst_smpte_sink1_template, "sink1");
	GST_PAD_SET_PROXY_CAPS (smpte->sinkpad1);
	gst_element_add_pad (GST_ELEMENT (smpte), smpte->sinkpad1);

	smpte->sinkpad2 =
	gst_pad_new_from_static_template (&gst_smpte_sink2_template, "sink2");
	GST_PAD_SET_PROXY_CAPS (smpte->sinkpad2);
	gst_element_add_pad (GST_ELEMENT (smpte), smpte->sinkpad2);

	smpte->srcpad =
	gst_pad_new_from_static_template (&gst_smpte_src_template, "src");
	gst_element_add_pad (GST_ELEMENT (smpte), smpte->srcpad);

	smpte->collect = gst_collect_pads_new ();
	gst_collect_pads_set_function (smpte->collect,
	(GstCollectPadsFunction) GST_DEBUG_FUNCPTR (gst_smpte_collected), smpte);
	gst_collect_pads_set_event_function (smpte->collect,
	GST_DEBUG_FUNCPTR (gst_smpte_sink_event), smpte);

	gst_collect_pads_add_pad (smpte->collect, smpte->sinkpad1,
	sizeof (GstCollectData), NULL, TRUE);
	gst_collect_pads_add_pad (smpte->collect, smpte->sinkpad2,
	sizeof (GstCollectData), NULL, TRUE);

	smpte->type = DEFAULT_PROP_TYPE;
	smpte->border = DEFAULT_PROP_BORDER;
	smpte->depth = DEFAULT_PROP_DEPTH;
	smpte->duration = DEFAULT_PROP_DURATION;
	smpte->invert = DEFAULT_PROP_INVERT;
	smpte->fps_num = 0;
	smpte->fps_denom = 1;
	}

	static void
	gst_smpte_finalize (GstSMPTE * smpte)
	{
	if (smpte->collect) {
	gst_object_unref (smpte->collect);
	}
	if (smpte->mask) {
	gst_mask_destroy (smpte->mask);
	}

	G_OBJECT_CLASS (parent_class)->finalize ((GObject *) smpte);
	}

	static void
	gst_smpte_reset (GstSMPTE * smpte)
	{
	smpte->width = -1;
	smpte->height = -1;
	smpte->position = 0;
	smpte->end_position = 0;
	smpte->send_stream_start = TRUE;
	}

	static void
	gst_smpte_blend_i420 (GstVideoFrame * frame1, GstVideoFrame * frame2,
	GstVideoFrame * oframe, GstMask * mask, gint border, gint pos)
	{
	guint32 *maskp;
	gint value;
	gint i, j;
	gint min, max;
	guint8 in1, in2, out, in1u, in1v, in2u, in2v, outu, *outv;
	gint width, height;

	if (border == 0)
	border++;

	min = pos - border;
	max = pos;

	width = GST_VIDEO_FRAME_WIDTH (frame1);
	height = GST_VIDEO_FRAME_HEIGHT (frame1);

	in1 = GST_VIDEO_FRAME_COMP_DATA (frame1, 0);
	in2 = GST_VIDEO_FRAME_COMP_DATA (frame2, 0);
	out = GST_VIDEO_FRAME_COMP_DATA (oframe, 0);

	in1u = GST_VIDEO_FRAME_COMP_DATA (frame1, 1);
	in1v = GST_VIDEO_FRAME_COMP_DATA (frame1, 2);
	in2u = GST_VIDEO_FRAME_COMP_DATA (frame2, 1);
	in2v = GST_VIDEO_FRAME_COMP_DATA (frame2, 2);
	outu = GST_VIDEO_FRAME_COMP_DATA (oframe, 1);
	outv = GST_VIDEO_FRAME_COMP_DATA (oframe, 2);

	maskp = mask->data;

	for (i = 0; i < height; i++) {
	for (j = 0; j < width; j++) {
	value = *maskp++;
	value = ((CLAMP (value, min, max) - min) << 8) / border;

	out[j] = ((in1[j] * value) + (in2[j] * (256 - value))) >> 8;
	if (!(i & 1) && !(j & 1)) {
	outu[j / 2] =
	((in1u[j / 2] * value) + (in2u[j / 2] * (256 - value))) >> 8;
	outv[j / 2] =
	((in1v[j / 2] * value) + (in2v[j / 2] * (256 - value))) >> 8;
	}
	}

	in1 += GST_VIDEO_FRAME_COMP_STRIDE (frame1, 0);
	in2 += GST_VIDEO_FRAME_COMP_STRIDE (frame2, 0);
	out += GST_VIDEO_FRAME_COMP_STRIDE (oframe, 0);

	if (!(i & 1)) {
	in1u += GST_VIDEO_FRAME_COMP_STRIDE (frame1, 1);
	in2u += GST_VIDEO_FRAME_COMP_STRIDE (frame2, 1);
	in1v += GST_VIDEO_FRAME_COMP_STRIDE (frame1, 2);
	in2v += GST_VIDEO_FRAME_COMP_STRIDE (frame1, 2);
	outu += GST_VIDEO_FRAME_COMP_STRIDE (oframe, 1);
	outv += GST_VIDEO_FRAME_COMP_STRIDE (oframe, 2);
	}
	}
	}

	static GstFlowReturn
	gst_smpte_collected (GstCollectPads * pads, GstSMPTE * smpte)
	{
	GstBuffer *outbuf;
	GstClockTime ts;
	GstBuffer in1 = NULL, in2 = NULL;
	GSList *collected;
	GstMapInfo map;
	GstVideoFrame frame1, frame2, oframe;

	if (G_UNLIKELY (smpte->fps_num == 0))
	goto not_negotiated;

	if (!gst_pad_has_current_caps (smpte->sinkpad1) \|\|
	!gst_pad_has_current_caps (smpte->sinkpad2))
	goto not_negotiated;

	if (!gst_video_info_is_equal (&smpte->vinfo1, &smpte->vinfo2))
	goto input_formats_do_not_match;

	if (smpte->send_stream_start) {
	gchar s_id[32];

	/* stream-start (FIXME: create id based on input ids) */
	g_snprintf (s_id, sizeof (s_id), "smpte-%08x", g_random_int ());
	gst_pad_push_event (smpte->srcpad, gst_event_new_stream_start (s_id));
	smpte->send_stream_start = FALSE;
	}

	ts = gst_util_uint64_scale_int (smpte->position * GST_SECOND,
	smpte->fps_denom, smpte->fps_num);

	for (collected = pads->data; collected; collected = g_slist_next (collected)) {
	GstCollectData *data;

	data = (GstCollectData *) collected->data;

	if (data->pad == smpte->sinkpad1)
	in1 = gst_collect_pads_pop (pads, data);
	else if (data->pad == smpte->sinkpad2)
	in2 = gst_collect_pads_pop (pads, data);
	}

	if (in1 == NULL) {
	/* if no input, make picture black */
	in1 = gst_buffer_new_and_alloc (GST_VIDEO_INFO_SIZE (&smpte->vinfo1));
	gst_buffer_map (in1, &map, GST_MAP_WRITE);
	fill_i420 (&smpte->vinfo1, map.data, smpte->height, 7);
	gst_buffer_unmap (in1, &map);
	}
	if (in2 == NULL) {
	/* if no input, make picture white */
	in2 = gst_buffer_new_and_alloc (GST_VIDEO_INFO_SIZE (&smpte->vinfo2));
	gst_buffer_map (in2, &map, GST_MAP_WRITE);
	fill_i420 (&smpte->vinfo2, map.data, smpte->height, 0);
	gst_buffer_unmap (in2, &map);
	}

	if (smpte->position < smpte->end_position) {
	outbuf = gst_buffer_new_and_alloc (GST_VIDEO_INFO_SIZE (&smpte->vinfo1));

	/* set caps if not done yet */
	if (!gst_pad_has_current_caps (smpte->srcpad)) {
	GstCaps *caps;
	GstSegment segment;

	caps = gst_video_info_to_caps (&smpte->vinfo1);

	gst_pad_set_caps (smpte->srcpad, caps);
	gst_caps_unref (caps);

	gst_segment_init (&segment, GST_FORMAT_TIME);
	gst_pad_push_event (smpte->srcpad, gst_event_new_segment (&segment));
	}

	gst_video_frame_map (&frame1, &smpte->vinfo1, in1, GST_MAP_READ);
	gst_video_frame_map (&frame2, &smpte->vinfo2, in2, GST_MAP_READ);
	/* re-use either info, now know they are essentially identical */
	gst_video_frame_map (&oframe, &smpte->vinfo1, outbuf, GST_MAP_WRITE);
	gst_smpte_blend_i420 (&frame1, &frame2, &oframe, smpte->mask, smpte->border,
	((1 << smpte->depth) + smpte->border) *
	smpte->position / smpte->end_position);
	gst_video_frame_unmap (&frame1);
	gst_video_frame_unmap (&frame2);
	gst_video_frame_unmap (&oframe);
	} else {
	outbuf = in2;
	gst_buffer_ref (in2);
	}

	smpte->position++;

	if (in1)
	gst_buffer_unref (in1);
	if (in2)
	gst_buffer_unref (in2);

	GST_BUFFER_TIMESTAMP (outbuf) = ts;

	return gst_pad_push (smpte->srcpad, outbuf);

	/* ERRORS */
	not_negotiated:
	{
	GST_ELEMENT_ERROR (smpte, CORE, NEGOTIATION, (NULL),
	("No input format negotiated"));
	return GST_FLOW_NOT_NEGOTIATED;
	}
	input_formats_do_not_match:
	{
	GstCaps caps1, caps2;

	caps1 = gst_pad_get_current_caps (smpte->sinkpad1);
	caps2 = gst_pad_get_current_caps (smpte->sinkpad2);
	GST_ELEMENT_ERROR (smpte, CORE, NEGOTIATION, (NULL),
	("input formats don't match: %" GST_PTR_FORMAT " vs. %" GST_PTR_FORMAT,
	caps1, caps2));
	if (caps1)
	gst_caps_unref (caps1);
	if (caps2)
	gst_caps_unref (caps2);
	return GST_FLOW_ERROR;
	}
	}

	static void
	gst_smpte_set_property (GObject * object, guint prop_id,
	const GValue * value, GParamSpec * pspec)
	{
	GstSMPTE *smpte;

	smpte = GST_SMPTE (object);

	switch (prop_id) {
	case PROP_TYPE:
	smpte->type = g_value_get_enum (value);
	break;
	case PROP_BORDER:
	smpte->border = g_value_get_int (value);
	break;
	case PROP_DEPTH:
	smpte->depth = g_value_get_int (value);
	break;
	case PROP_DURATION:
	smpte->duration = g_value_get_uint64 (value);
	break;
	case PROP_INVERT:
	smpte->invert = g_value_get_boolean (value);
	break;
	default:
	G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
	break;
	}
	}

	static void
	gst_smpte_get_property (GObject * object, guint prop_id,
	GValue * value, GParamSpec * pspec)
	{
	GstSMPTE *smpte;

	smpte = GST_SMPTE (object);

	switch (prop_id) {
	case PROP_TYPE:
	g_value_set_enum (value, smpte->type);
	break;
	case PROP_BORDER:
	g_value_set_int (value, smpte->border);
	break;
	case PROP_DEPTH:
	g_value_set_int (value, smpte->depth);
	break;
	case PROP_DURATION:
	g_value_set_uint64 (value, smpte->duration);
	break;
	case PROP_INVERT:
	g_value_set_boolean (value, smpte->invert);
	break;
	default:
	G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
	break;
	}
	}

	static GstStateChangeReturn
	gst_smpte_change_state (GstElement * element, GstStateChange transition)
	{
	GstStateChangeReturn ret;
	GstSMPTE *smpte;

	smpte = GST_SMPTE (element);

	switch (transition) {
	case GST_STATE_CHANGE_READY_TO_PAUSED:
	gst_smpte_reset (smpte);
	GST_LOG_OBJECT (smpte, "starting collectpads");
	gst_collect_pads_start (smpte->collect);
	break;
	case GST_STATE_CHANGE_PAUSED_TO_READY:
	GST_LOG_OBJECT (smpte, "stopping collectpads");
	gst_collect_pads_stop (smpte->collect);
	break;
	default:
	break;
	}

	ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);

	switch (transition) {
	case GST_STATE_CHANGE_PAUSED_TO_READY:
	gst_smpte_reset (smpte);
	break;
	default:
	break;
	}
	return ret;
	}

	gboolean
	gst_smpte_plugin_init (GstPlugin * plugin)
	{
	GST_DEBUG_CATEGORY_INIT (gst_smpte_debug, "smpte", 0,
	"SMPTE transition effect");

	return gst_element_register (plugin, "smpte", GST_RANK_NONE, GST_TYPE_SMPTE);
	}