C++ (Cpp) gst_camerabin_create_preview_pipelineの例

コード例 #1

ファイル: gstbasecamerasrc.c プロジェクト: Tonyton/gstreamer-ducati

static GstStateChangeReturn
gst_base_camera_src_change_state (GstElement * element,
    GstStateChange transition)
{
  GstStateChangeReturn ret = GST_STATE_CHANGE_SUCCESS;
  GstBaseCameraBinSrc *self = GST_BASE_CAMERA_SRC (element);

  GST_DEBUG_OBJECT (self, "%d -> %d",
      GST_STATE_TRANSITION_CURRENT (transition),
      GST_STATE_TRANSITION_NEXT (transition));

  switch (transition) {
    case GST_STATE_CHANGE_NULL_TO_READY:
      if (!construct_pipeline (self))
        return GST_STATE_CHANGE_FAILURE;

      /* recreate the preview pipeline */
      if (self->preview_pipeline && self->preview_filter_changed) {
        gst_camerabin_destroy_preview_pipeline (self->preview_pipeline);
        self->preview_pipeline = NULL;
      }

      if (self->preview_pipeline == NULL)
        self->preview_pipeline =
            gst_camerabin_create_preview_pipeline (GST_ELEMENT_CAST (self),
            self->preview_filter);

      g_assert (self->preview_pipeline != NULL);
      self->preview_filter_changed = FALSE;
      if (self->preview_caps) {
        GST_DEBUG_OBJECT (self,
            "Setting preview pipeline caps %" GST_PTR_FORMAT,
            self->preview_caps);
        gst_camerabin_preview_set_caps (self->preview_pipeline,
            self->preview_caps);
      }
      break;
    case GST_STATE_CHANGE_READY_TO_PAUSED:
      if (!setup_pipeline (self))
        return GST_STATE_CHANGE_FAILURE;
      gst_element_set_state (self->preview_pipeline->pipeline,
          GST_STATE_PLAYING);
      break;
    default:
      break;
  }

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

  switch (transition) {
    case GST_STATE_CHANGE_READY_TO_NULL:
      gst_element_set_state (self->preview_pipeline->pipeline, GST_STATE_NULL);
      break;
    default:
      break;
  }

  return ret;
}

コード例 #2

ファイル: gstbasecamerasrc.c プロジェクト: drothlis/gst-plugins-bad

static void
gst_base_camera_src_init (GstBaseCameraSrc * self)
{
  self->width = DEFAULT_WIDTH;
  self->height = DEFAULT_HEIGHT;
  self->zoom = DEFAULT_ZOOM;
  self->max_zoom = MAX_ZOOM;
  self->mode = MODE_IMAGE;

  self->capturing = FALSE;
  g_mutex_init (&self->capturing_mutex);

  self->post_preview = DEFAULT_POST_PREVIEW;
  self->preview_caps = gst_caps_new_any ();

  self->preview_pipeline =
      gst_camerabin_create_preview_pipeline (GST_ELEMENT_CAST (self), NULL);
}

コード例 #3

ファイル: gstbasecamerasrc.c プロジェクト: pli3/gst-plugins-bad

static void
gst_base_camera_src_init (GstBaseCameraSrc * self,
    GstBaseCameraSrcClass * klass)
{
  self->width = DEFAULT_WIDTH;
  self->height = DEFAULT_HEIGHT;
  self->zoom = DEFAULT_ZOOM;
  self->max_zoom = MAX_ZOOM;
  self->mode = MODE_IMAGE;

  self->auto_start = DEFAULT_AUTO_START;
  self->capturing = FALSE;
  self->capturing_mutex = g_mutex_new ();

  self->post_preview = DEFAULT_POST_PREVIEW;

  self->preview_pipeline =
      gst_camerabin_create_preview_pipeline (GST_ELEMENT_CAST (self), NULL);
}