C++ GST_VIDEO_SINK_WIDTH函數代碼示例

static GdkPixbuf *
gst_gdk_pixbuf_sink_get_pixbuf_from_buffer (GstGdkPixbufSink * sink,
    GstBuffer * buf)
{
  GdkPixbuf *pix = NULL;
  GstVideoFrame *frame;
  gint minsize, bytes_per_pixel;

  g_return_val_if_fail (GST_VIDEO_SINK_WIDTH (sink) > 0, NULL);
  g_return_val_if_fail (GST_VIDEO_SINK_HEIGHT (sink) > 0, NULL);

  frame = g_slice_new0 (GstVideoFrame);
  gst_video_frame_map (frame, &sink->info, buf, GST_MAP_READ);

  bytes_per_pixel = (sink->has_alpha) ? 4 : 3;

  /* last row needn't have row padding */
  minsize = (GST_VIDEO_FRAME_COMP_STRIDE (frame, 0) *
      (GST_VIDEO_SINK_HEIGHT (sink) - 1)) +
      (bytes_per_pixel * GST_VIDEO_SINK_WIDTH (sink));

  g_return_val_if_fail (gst_buffer_get_size (buf) >= minsize, NULL);

  gst_buffer_ref (buf);
  pix = gdk_pixbuf_new_from_data (GST_VIDEO_FRAME_COMP_DATA (frame, 0),
      GDK_COLORSPACE_RGB, sink->has_alpha, 8, GST_VIDEO_SINK_WIDTH (sink),
      GST_VIDEO_SINK_HEIGHT (sink), GST_VIDEO_FRAME_COMP_STRIDE (frame, 0),
      (GdkPixbufDestroyNotify) gst_gdk_pixbuf_sink_pixbuf_destroy_notify,
      frame);

  return pix;
}

static GdkPixbuf *
gst_gdk_pixbuf_sink_get_pixbuf_from_buffer (GstGdkPixbufSink * sink,
    GstBuffer * buf)
{
  GdkPixbuf *pix = NULL;
  gint minsize, bytes_per_pixel;

  g_return_val_if_fail (GST_VIDEO_SINK_WIDTH (sink) > 0, NULL);
  g_return_val_if_fail (GST_VIDEO_SINK_HEIGHT (sink) > 0, NULL);

  bytes_per_pixel = (sink->has_alpha) ? 4 : 3;

  /* last row needn't have row padding */
  minsize = (sink->rowstride * (GST_VIDEO_SINK_HEIGHT (sink) - 1)) +
      (bytes_per_pixel * GST_VIDEO_SINK_WIDTH (sink));

  g_return_val_if_fail (GST_BUFFER_SIZE (buf) >= minsize, NULL);

  pix = gdk_pixbuf_new_from_data (GST_BUFFER_DATA (buf),
      GDK_COLORSPACE_RGB, sink->has_alpha, 8, GST_VIDEO_SINK_WIDTH (sink),
      GST_VIDEO_SINK_HEIGHT (sink), sink->rowstride,
      (GdkPixbufDestroyNotify) gst_gdk_pixbuf_sink_pixbuf_destroy_notify,
      gst_buffer_ref (buf));

  return pix;
}

static gboolean
gst_kms_sink_calculate_display_ratio (GstKMSSink * self, GstVideoInfo * vinfo)
{
  guint dar_n, dar_d;
  guint video_width, video_height;
  guint video_par_n, video_par_d;
  guint dpy_par_n, dpy_par_d;

  video_width = GST_VIDEO_INFO_WIDTH (vinfo);
  video_height = GST_VIDEO_INFO_HEIGHT (vinfo);
  video_par_n = GST_VIDEO_INFO_PAR_N (vinfo);
  video_par_d = GST_VIDEO_INFO_PAR_D (vinfo);

  gst_video_calculate_device_ratio (self->hdisplay, self->vdisplay,
      self->mm_width, self->mm_height, &dpy_par_n, &dpy_par_d);

  if (!gst_video_calculate_display_ratio (&dar_n, &dar_d, video_width,
          video_height, video_par_n, video_par_d, dpy_par_n, dpy_par_d))
    return FALSE;

  GST_DEBUG_OBJECT (self, "video calculated display ratio: %d/%d", dar_n,
      dar_d);

  /* now find a width x height that respects this display ratio.
   * prefer those that have one of w/h the same as the incoming video
   * using wd / hd = dar_n / dar_d */

  /* start with same height, because of interlaced video */
  /* check hd / dar_d is an integer scale factor, and scale wd with the PAR */
  if (video_height % dar_d == 0) {
    GST_DEBUG_OBJECT (self, "keeping video height");
    GST_VIDEO_SINK_WIDTH (self) = (guint)
        gst_util_uint64_scale_int (video_height, dar_n, dar_d);
    GST_VIDEO_SINK_HEIGHT (self) = video_height;
  } else if (video_width % dar_n == 0) {
    GST_DEBUG_OBJECT (self, "keeping video width");
    GST_VIDEO_SINK_WIDTH (self) = video_width;
    GST_VIDEO_SINK_HEIGHT (self) = (guint)
        gst_util_uint64_scale_int (video_width, dar_d, dar_n);
  } else {
    GST_DEBUG_OBJECT (self, "approximating while keeping video height");
    GST_VIDEO_SINK_WIDTH (self) = (guint)
        gst_util_uint64_scale_int (video_height, dar_n, dar_d);
    GST_VIDEO_SINK_HEIGHT (self) = video_height;
  }
  GST_DEBUG_OBJECT (self, "scaling to %dx%d", GST_VIDEO_SINK_WIDTH (self),
      GST_VIDEO_SINK_HEIGHT (self));

  return TRUE;
}

static void
gst_sdlvideosink_navigation_send_event (GstNavigation * navigation,
                                        GstStructure * structure)
{
    GstSDLVideoSink *sdlvideosink = GST_SDLVIDEOSINK (navigation);
    GstEvent *event;
    GstVideoRectangle dst = { 0, };
    GstVideoRectangle src = { 0, };
    GstVideoRectangle result;
    double x, y, old_x, old_y;
    GstPad *pad = NULL;

    src.w = GST_VIDEO_SINK_WIDTH (sdlvideosink);
    src.h = GST_VIDEO_SINK_HEIGHT (sdlvideosink);
    dst.w = sdlvideosink->width;
    dst.h = sdlvideosink->height;
    gst_video_sink_center_rect (src, dst, &result, FALSE);

    event = gst_event_new_navigation (structure);

    /* Our coordinates can be wrong here if we centered the video */

    /* Converting pointer coordinates to the non scaled geometry */
    if (gst_structure_get_double (structure, "pointer_x", &old_x)) {
        x = old_x;

        if (x >= result.x && x <= (result.x + result.w)) {
            x -= result.x;
            x *= sdlvideosink->width;
            x /= result.w;
        } else {
            x = 0;
        }
        GST_DEBUG_OBJECT (sdlvideosink, "translated navigation event x "
                          "coordinate from %f to %f", old_x, x);
        gst_structure_set (structure, "pointer_x", G_TYPE_DOUBLE, x, NULL);
    }
    if (gst_structure_get_double (structure, "pointer_y", &old_y)) {
        y = old_y;

        if (y >= result.y && y <= (result.y + result.h)) {
            y -= result.y;
            y *= sdlvideosink->height;
            y /= result.h;
        } else {
            y = 0;
        }
        GST_DEBUG_OBJECT (sdlvideosink, "translated navigation event y "
                          "coordinate from %f to %f", old_y, y);
        gst_structure_set (structure, "pointer_y", G_TYPE_DOUBLE, y, NULL);
    }

    pad = gst_pad_get_peer (GST_VIDEO_SINK_PAD (sdlvideosink));

    if (GST_IS_PAD (pad) && GST_IS_EVENT (event)) {
        gst_pad_send_event (pad, event);

        gst_object_unref (pad);
    }
}

static gboolean
gst_glimage_sink_redisplay (GstGLImageSink * gl_sink)
{
  GstGLWindow *window;
  gboolean alive;

  window = gst_gl_context_get_window (gl_sink->context);

  if (window && gst_gl_window_is_running (window)) {

#if GST_GL_HAVE_GLES2
    if (USING_GLES2 (gl_sink->context)) {
      if (!gl_sink->redisplay_shader) {
        gst_gl_window_send_message (window,
            GST_GL_WINDOW_CB (gst_glimage_sink_thread_init_redisplay), gl_sink);
      }
    }
#endif

    /* Drawing is asynchrone: gst_gl_window_draw is not blocking
     * It means that it does not wait for stuff being executed in other threads
     */
    gst_gl_window_draw (window, GST_VIDEO_SINK_WIDTH (gl_sink),
        GST_VIDEO_SINK_HEIGHT (gl_sink));
  }
  alive = gst_gl_window_is_running (window);
  gst_object_unref (window);

  return alive;
}

static gboolean
gst_v4l2sink_set_caps (GstBaseSink * bsink, GstCaps * caps)
{
  GstV4l2Sink *v4l2sink = GST_V4L2SINK (bsink);
  GstV4l2Object *obj = v4l2sink->v4l2object;

  LOG_CAPS (v4l2sink, caps);

  if (!GST_V4L2_IS_OPEN (v4l2sink->v4l2object)) {
    GST_DEBUG_OBJECT (v4l2sink, "device is not open");
    return FALSE;
  }

  /* make sure the caps changed before doing anything */
  if (gst_v4l2_object_caps_equal (obj, caps))
    return TRUE;

  if (!gst_v4l2_object_stop (obj))
    goto stop_failed;

  if (!gst_v4l2_object_set_format (v4l2sink->v4l2object, caps))
    goto invalid_format;

  gst_v4l2sink_sync_overlay_fields (v4l2sink);
  gst_v4l2sink_sync_crop_fields (v4l2sink);

#ifdef HAVE_XVIDEO
  gst_v4l2_video_overlay_prepare_window_handle (v4l2sink->v4l2object, TRUE);
#endif

  GST_INFO_OBJECT (v4l2sink, "outputting buffers via mmap()");

  v4l2sink->video_width = GST_V4L2_WIDTH (v4l2sink->v4l2object);
  v4l2sink->video_height = GST_V4L2_HEIGHT (v4l2sink->v4l2object);

  /* TODO: videosink width/height should be scaled according to
   * pixel-aspect-ratio
   */
  GST_VIDEO_SINK_WIDTH (v4l2sink) = v4l2sink->video_width;
  GST_VIDEO_SINK_HEIGHT (v4l2sink) = v4l2sink->video_height;

  return TRUE;

  /* ERRORS */
stop_failed:
  {
    GST_DEBUG_OBJECT (v4l2sink, "failed to stop streaming");
    return FALSE;
  }
invalid_format:
  {
    /* error already posted */
    GST_DEBUG_OBJECT (v4l2sink, "can't set format");
    return FALSE;
  }
}

static void
gst_glimage_sink_navigation_send_event (GstNavigation * navigation, GstStructure
    * structure)
{
  GstGLImageSink *sink = GST_GLIMAGE_SINK (navigation);
  GstEvent *event = NULL;
  GstPad *pad = NULL;
  GstGLWindow *window = gst_gl_context_get_window (sink->context);
  guint width, height;
  gdouble x, y, xscale, yscale;

  g_return_if_fail (GST_GL_IS_WINDOW (window));

  width = GST_VIDEO_SINK_WIDTH (sink);
  height = GST_VIDEO_SINK_HEIGHT (sink);
  gst_gl_window_get_surface_dimensions (window, &width, &height);

  event = gst_event_new_navigation (structure);

  pad = gst_pad_get_peer (GST_VIDEO_SINK_PAD (sink));
  /* Converting pointer coordinates to the non scaled geometry */
  if (width != GST_VIDEO_SINK_WIDTH (sink) &&
      width != 0 && gst_structure_get_double (structure, "pointer_x", &x)) {
    xscale = (gdouble) GST_VIDEO_SINK_WIDTH (sink) / width;
    gst_structure_set (structure, "pointer_x", G_TYPE_DOUBLE,
        (gdouble) x * xscale, NULL);
  }
  if (height != GST_VIDEO_SINK_HEIGHT (sink) &&
      height != 0 && gst_structure_get_double (structure, "pointer_y", &y)) {
    yscale = (gdouble) GST_VIDEO_SINK_HEIGHT (sink) / height;
    gst_structure_set (structure, "pointer_y", G_TYPE_DOUBLE,
        (gdouble) y * yscale, NULL);
  }


  if (GST_IS_PAD (pad) && GST_IS_EVENT (event))
    gst_pad_send_event (pad, event);

  gst_object_unref (pad);
  gst_object_unref (window);
}

static GstFlowReturn
gst_glimage_sink_show_frame (GstVideoSink * vsink, GstBuffer * buf)
{
  GstGLImageSink *glimage_sink;
  GstBuffer *stored_buffer;

  GST_TRACE ("rendering buffer:%p", buf);

  glimage_sink = GST_GLIMAGE_SINK (vsink);

  GST_TRACE ("redisplay texture:%u of size:%ux%u, window size:%ux%u",
      glimage_sink->next_tex, GST_VIDEO_INFO_WIDTH (&glimage_sink->info),
      GST_VIDEO_INFO_HEIGHT (&glimage_sink->info),
      GST_VIDEO_SINK_WIDTH (glimage_sink),
      GST_VIDEO_SINK_HEIGHT (glimage_sink));

  /* Avoid to release the texture while drawing */
  GST_GLIMAGE_SINK_LOCK (glimage_sink);
  glimage_sink->redisplay_texture = glimage_sink->next_tex;
  stored_buffer = glimage_sink->stored_buffer;
  glimage_sink->stored_buffer = gst_buffer_ref (buf);
  GST_GLIMAGE_SINK_UNLOCK (glimage_sink);
  if (stored_buffer)
    gst_buffer_unref (stored_buffer);

  /* Ask the underlying window to redraw its content */
  if (!gst_glimage_sink_redisplay (glimage_sink))
    goto redisplay_failed;

  GST_TRACE ("post redisplay");

  if (g_atomic_int_get (&glimage_sink->to_quit) != 0) {
    GST_ELEMENT_ERROR (glimage_sink, RESOURCE, NOT_FOUND,
        ("%s", gst_gl_context_get_error ()), (NULL));
    gst_gl_upload_release_buffer (glimage_sink->upload);
    return GST_FLOW_ERROR;
  }

  return GST_FLOW_OK;

/* ERRORS */
redisplay_failed:
  {
    gst_gl_upload_release_buffer (glimage_sink->upload);
    GST_ELEMENT_ERROR (glimage_sink, RESOURCE, NOT_FOUND,
        ("%s", gst_gl_context_get_error ()), (NULL));
    return GST_FLOW_ERROR;
  }
}

static gboolean
gst_glimage_sink_set_caps (GstBaseSink * bsink, GstCaps * caps)
{
  GstGLImageSink *glimage_sink;
  gint width;
  gint height;
  gboolean ok;
  gint fps_n, fps_d;
  gint par_n, par_d;
  GstVideoFormat format;
  GstStructure *structure;
  gboolean is_gl;

  GST_DEBUG ("set caps with %" GST_PTR_FORMAT, caps);

  glimage_sink = GST_GLIMAGE_SINK (bsink);

  structure = gst_caps_get_structure (caps, 0);
  if (gst_structure_has_name (structure, "video/x-raw-gl")) {
    is_gl = TRUE;
    format = GST_VIDEO_FORMAT_UNKNOWN;
    ok = gst_structure_get_int (structure, "width", &width);
    ok &= gst_structure_get_int (structure, "height", &height);
  } else {
    is_gl = FALSE;
    ok = gst_video_format_parse_caps (caps, &format, &width, &height);
  }
  ok &= gst_video_parse_caps_framerate (caps, &fps_n, &fps_d);
  ok &= gst_video_parse_caps_pixel_aspect_ratio (caps, &par_n, &par_d);

  if (!ok)
    return FALSE;

  GST_VIDEO_SINK_WIDTH (glimage_sink) = width;
  GST_VIDEO_SINK_HEIGHT (glimage_sink) = height;
  glimage_sink->is_gl = is_gl;
  glimage_sink->format = format;
  glimage_sink->width = width;
  glimage_sink->height = height;
  glimage_sink->fps_n = fps_n;
  glimage_sink->fps_d = fps_d;
  glimage_sink->par_n = par_n;
  glimage_sink->par_d = par_d;

  if (!glimage_sink->window_id && !glimage_sink->new_window_id)
    gst_x_overlay_prepare_xwindow_id (GST_X_OVERLAY (glimage_sink));

  return TRUE;
}

static GstStateChangeReturn
gst_pvrvideosink_change_state (GstElement * element, GstStateChange transition)
{
  GstPVRVideoSink *pvrvideosink;
  GstStateChangeReturn ret = GST_STATE_CHANGE_SUCCESS;
  GstDrawContext *dcontext;

  pvrvideosink = GST_PVRVIDEOSINK (element);

  switch (transition) {
    case GST_STATE_CHANGE_NULL_TO_READY:
      if (pvrvideosink->dcontext == NULL) {
        dcontext = gst_pvrvideosink_get_dcontext (pvrvideosink);
        if (dcontext == NULL)
          return GST_STATE_CHANGE_FAILURE;
        GST_OBJECT_LOCK (pvrvideosink);
        pvrvideosink->dcontext = dcontext;
        GST_OBJECT_UNLOCK (pvrvideosink);
      }
      gst_pvrvideosink_manage_event_thread (pvrvideosink);
      break;
    case GST_STATE_CHANGE_READY_TO_PAUSED:
      break;
    case GST_STATE_CHANGE_PAUSED_TO_READY:
      break;
    case GST_STATE_CHANGE_PAUSED_TO_PLAYING:
      break;
    default:
      break;
  }

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

  switch (transition) {
    case GST_STATE_CHANGE_PLAYING_TO_PAUSED:
      break;
    case GST_STATE_CHANGE_PAUSED_TO_READY:
      GST_VIDEO_SINK_WIDTH (pvrvideosink) = 0;
      GST_VIDEO_SINK_HEIGHT (pvrvideosink) = 0;
      break;
    case GST_STATE_CHANGE_READY_TO_NULL:
      gst_pvrvideosink_reset (pvrvideosink);
      break;
    default:
      break;
  }

  return ret;
}

static void
gst_vdp_sink_navigation_send_event (GstNavigation * navigation,
    GstStructure * structure)
{
  VdpSink *vdp_sink = GST_VDP_SINK (navigation);
  GstEvent *event;
  gint x_offset, y_offset;
  gdouble x, y;
  GstPad *pad = NULL;

  event = gst_event_new_navigation (structure);

  /* We are not converting the pointer coordinates as there's no hardware
     scaling done here. The only possible scaling is done by videoscale and
     videoscale will have to catch those events and tranform the coordinates
     to match the applied scaling. So here we just add the offset if the image
     is centered in the window.  */

  /* We take the flow_lock while we look at the window */
  g_mutex_lock (vdp_sink->flow_lock);

  if (!vdp_sink->window) {
    g_mutex_unlock (vdp_sink->flow_lock);
    return;
  }

  x_offset = vdp_sink->window->width - GST_VIDEO_SINK_WIDTH (vdp_sink);
  y_offset = vdp_sink->window->height - GST_VIDEO_SINK_HEIGHT (vdp_sink);

  g_mutex_unlock (vdp_sink->flow_lock);

  if (x_offset > 0 && gst_structure_get_double (structure, "pointer_x", &x)) {
    x -= x_offset / 2;
    gst_structure_set (structure, "pointer_x", G_TYPE_DOUBLE, x, NULL);
  }
  if (y_offset > 0 && gst_structure_get_double (structure, "pointer_y", &y)) {
    y -= y_offset / 2;
    gst_structure_set (structure, "pointer_y", G_TYPE_DOUBLE, y, NULL);
  }

  pad = gst_pad_get_peer (GST_VIDEO_SINK_PAD (vdp_sink));

  if (GST_IS_PAD (pad) && GST_IS_EVENT (event)) {
    gst_pad_send_event (pad, event);

    gst_object_unref (pad);
  }
}

static void
gst_glimage_sink_on_resize (GstGLImageSink * gl_sink, gint width, gint height)
{
  /* Here gl_sink members (ex:gl_sink->info) have a life time of set_caps.
   * It means that they cannot not change between two set_caps
   */
  const GstGLFuncs *gl = gl_sink->context->gl_vtable;
  gboolean do_reshape;

  GST_TRACE ("GL Window resized to %ux%u", width, height);

  /* check if a client reshape callback is registered */
  g_signal_emit (gl_sink, gst_glimage_sink_signals[CLIENT_RESHAPE_SIGNAL], 0,
      gl_sink->context, width, height, &do_reshape);

  /* default reshape */
  if (!do_reshape) {
    if (gl_sink->keep_aspect_ratio) {
      GstVideoRectangle src, dst, result;

      src.x = 0;
      src.y = 0;
      src.w = GST_VIDEO_SINK_WIDTH (gl_sink);
      src.h = GST_VIDEO_SINK_HEIGHT (gl_sink);

      dst.x = 0;
      dst.y = 0;
      dst.w = width;
      dst.h = height;

      gst_video_sink_center_rect (src, dst, &result, TRUE);
      gl->Viewport (result.x, result.y, result.w, result.h);
    } else {
      gl->Viewport (0, 0, width, height);
    }
#if GST_GL_HAVE_OPENGL
    if (USING_OPENGL (gl_sink->context)) {
      gl->MatrixMode (GL_PROJECTION);
      gl->LoadIdentity ();
      gluOrtho2D (0, width, 0, height);
      gl->MatrixMode (GL_MODELVIEW);
    }
#endif
  }
}

static GstStateChangeReturn
gst_glimage_sink_change_state (GstElement * element, GstStateChange transition)
{
  GstGLImageSink *glimage_sink;
  GstStateChangeReturn ret = GST_STATE_CHANGE_SUCCESS;

  GST_DEBUG ("change state");

  glimage_sink = GST_GLIMAGE_SINK (element);

  switch (transition) {
    case GST_STATE_CHANGE_NULL_TO_READY:
      break;
    case GST_STATE_CHANGE_READY_TO_PAUSED:
      break;
    case GST_STATE_CHANGE_PAUSED_TO_PLAYING:
      break;
    default:
      break;
  }

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

  switch (transition) {
    case GST_STATE_CHANGE_PLAYING_TO_PAUSED:
      break;
    case GST_STATE_CHANGE_PAUSED_TO_READY:
      gst_glimage_sink_stop (GST_BASE_SINK (glimage_sink));
      glimage_sink->fps_n = 0;
      glimage_sink->fps_d = 1;
      GST_VIDEO_SINK_WIDTH (glimage_sink) = 0;
      GST_VIDEO_SINK_HEIGHT (glimage_sink) = 0;
      break;
    case GST_STATE_CHANGE_READY_TO_NULL:
      break;
    default:
      break;
  }

  return ret;
}

static gboolean
gst_gdk_pixbuf_sink_set_caps (GstBaseSink * basesink, GstCaps * caps)
{
  GstGdkPixbufSink *sink = GST_GDK_PIXBUF_SINK (basesink);
  GstVideoInfo info;
  GstVideoFormat fmt;
  gint w, h, s, par_n, par_d;

  GST_LOG_OBJECT (sink, "caps: %" GST_PTR_FORMAT, caps);

  if (!gst_video_info_from_caps (&info, caps)) {
    GST_WARNING_OBJECT (sink, "parse_caps failed");
    return FALSE;
  }

  fmt = GST_VIDEO_INFO_FORMAT (&info);
  w = GST_VIDEO_INFO_WIDTH (&info);
  h = GST_VIDEO_INFO_HEIGHT (&info);
  s = GST_VIDEO_INFO_COMP_PSTRIDE (&info, 0);
  par_n = GST_VIDEO_INFO_PAR_N (&info);
  par_d = GST_VIDEO_INFO_PAR_N (&info);

  g_assert ((fmt == GST_VIDEO_FORMAT_RGB && s == 3) ||
      (fmt == GST_VIDEO_FORMAT_RGBA && s == 4));

  GST_VIDEO_SINK_WIDTH (sink) = w;
  GST_VIDEO_SINK_HEIGHT (sink) = h;

  sink->par_n = par_n;
  sink->par_d = par_d;

  sink->has_alpha = GST_VIDEO_INFO_HAS_ALPHA (&info);

  GST_INFO_OBJECT (sink, "format             : %d", fmt);
  GST_INFO_OBJECT (sink, "width x height     : %d x %d", w, h);
  GST_INFO_OBJECT (sink, "pixel-aspect-ratio : %d/%d", par_n, par_d);

  sink->info = info;

  return TRUE;
}

static gboolean
gst_gdk_pixbuf_sink_stop (GstBaseSink * basesink)
{
  GstGdkPixbufSink *sink = GST_GDK_PIXBUF_SINK (basesink);

  GST_VIDEO_SINK_WIDTH (sink) = 0;
  GST_VIDEO_SINK_HEIGHT (sink) = 0;

  sink->par_n = 0;
  sink->par_d = 0;
  sink->has_alpha = FALSE;

  if (sink->last_pixbuf) {
    g_object_unref (sink->last_pixbuf);
    sink->last_pixbuf = NULL;
  }

  GST_LOG_OBJECT (sink, "stop");

  return TRUE;
}