basecamerasrc: Remove ghostpads

Remove ghost pads from basecamerasrc. Different implementations
of camera sources might not use ghostpads and use default pads.

gst/camerabin2/gstbasecamerasrc.c

@@ -50,17 +50,20 @@ GST_DEBUG_CATEGORY (base_camera_src_debug);
 
 GST_BOILERPLATE (GstBaseCameraSrc, gst_base_camera_src, GstBin, GST_TYPE_BIN);
 
-static GstStaticPadTemplate vfsrc_template = GST_STATIC_PAD_TEMPLATE ("vfsrc",
+static GstStaticPadTemplate vfsrc_template =
+GST_STATIC_PAD_TEMPLATE (GST_BASE_CAMERA_SRC_VIEWFINDER_PAD_NAME,
     GST_PAD_SRC,
     GST_PAD_ALWAYS,
     GST_STATIC_CAPS_ANY);
 
-static GstStaticPadTemplate imgsrc_template = GST_STATIC_PAD_TEMPLATE ("imgsrc",
+static GstStaticPadTemplate imgsrc_template =
+GST_STATIC_PAD_TEMPLATE (GST_BASE_CAMERA_SRC_IMAGE_PAD_NAME,
     GST_PAD_SRC,
     GST_PAD_ALWAYS,
     GST_STATIC_CAPS_ANY);
 
-static GstStaticPadTemplate vidsrc_template = GST_STATIC_PAD_TEMPLATE ("vidsrc",
+static GstStaticPadTemplate vidsrc_template =
+GST_STATIC_PAD_TEMPLATE (GST_BASE_CAMERA_SRC_VIDEO_PAD_NAME,
     GST_PAD_SRC,
     GST_PAD_ALWAYS,
     GST_STATIC_CAPS_ANY);
@@ -368,35 +371,14 @@ static gboolean
 construct_pipeline (GstBaseCameraSrc * self)
 {
   GstBaseCameraSrcClass *bclass = GST_BASE_CAMERA_SRC_GET_CLASS (self);
-  GstPad *vfsrc = NULL;
-  GstPad *imgsrc = NULL;
-  GstPad *vidsrc = NULL;
 
   g_return_val_if_fail (bclass->construct_pipeline, FALSE);
 
-  if (!bclass->construct_pipeline (self, &vfsrc, &imgsrc, &vidsrc)) {
+  if (!bclass->construct_pipeline (self)) {
     GST_ERROR_OBJECT (self, "pipeline construction failed");
     return FALSE;
   }
 
-  if (!vfsrc || !imgsrc || !vidsrc) {
-    GST_ERROR_OBJECT (self, "derived class must return src pads");
-    return FALSE;
-  }
-
-  GST_DEBUG_OBJECT (self, "vfsrc:  %" GST_PTR_FORMAT, vfsrc);
-  GST_DEBUG_OBJECT (self, "imgsrc: %" GST_PTR_FORMAT, imgsrc);
-  GST_DEBUG_OBJECT (self, "vidsrc: %" GST_PTR_FORMAT, vidsrc);
-
-  /* hook-up the ghostpads */
-  gst_ghost_pad_set_target (GST_GHOST_PAD (self->vfsrc), vfsrc);
-  gst_ghost_pad_set_target (GST_GHOST_PAD (self->imgsrc), imgsrc);
-  gst_ghost_pad_set_target (GST_GHOST_PAD (self->vidsrc), vidsrc);
-
-  gst_pad_set_active (self->vfsrc, TRUE);
-  gst_pad_set_active (self->imgsrc, TRUE);      /* XXX ??? */
-  gst_pad_set_active (self->vidsrc, TRUE);      /* XXX ??? */
-
   return TRUE;
 }
 
@@ -527,15 +509,6 @@ static void
 gst_base_camera_src_init (GstBaseCameraSrc * self,
     GstBaseCameraSrcClass * klass)
 {
-  self->vfsrc = gst_ghost_pad_new_no_target ("vfsrc", GST_PAD_SRC);
-  gst_element_add_pad (GST_ELEMENT (self), self->vfsrc);
-
-  self->imgsrc = gst_ghost_pad_new_no_target ("imgsrc", GST_PAD_SRC);
-  gst_element_add_pad (GST_ELEMENT (self), self->imgsrc);
-
-  self->vidsrc = gst_ghost_pad_new_no_target ("vidsrc", GST_PAD_SRC);
-  gst_element_add_pad (GST_ELEMENT (self), self->vidsrc);
-
   self->width = DEFAULT_WIDTH;
   self->height = DEFAULT_HEIGHT;
   self->zoom = DEFAULT_ZOOM;

gst/camerabin2/gstbasecamerasrc.h

@@ -48,6 +48,9 @@ GType gst_base_camera_src_get_type (void);
 typedef struct _GstBaseCameraSrc GstBaseCameraSrc;
 typedef struct _GstBaseCameraSrcClass GstBaseCameraSrcClass;
 
+#define GST_BASE_CAMERA_SRC_VIEWFINDER_PAD_NAME "vfsrc"
+#define GST_BASE_CAMERA_SRC_IMAGE_PAD_NAME "imgsrc"
+#define GST_BASE_CAMERA_SRC_VIDEO_PAD_NAME "vidsrc"
 
 /**
  * GstBaseCameraSrc:
@@ -56,10 +59,6 @@ struct _GstBaseCameraSrc
 {
   GstBin parent;
 
-  GstPad *vfsrc;
-  GstPad *imgsrc;
-  GstPad *vidsrc;
-
   gint mode;
 
   gboolean capturing;
@@ -105,13 +104,8 @@ struct _GstBaseCameraSrcClass
 {
   GstBinClass parent;
 
-  /* construct pipeline must be implemented by derived class, and return by
-   * reference vfsrc, imgsrc, and vidsrc pads of the contained pipeline, which
-   * will be ghosted to the src pads of the camerasrc bin (and optionally the
-   * preview src pads?) */
-  gboolean    (*construct_pipeline)  (GstBaseCameraSrc *self,
-                                      GstPad **vfsrc, GstPad **imgsrc,
-                                      GstPad **vidsrc);
+  /* construct pipeline must be implemented by derived class */
+  gboolean    (*construct_pipeline)  (GstBaseCameraSrc *self);
 
   /* optional */
   gboolean    (*setup_pipeline)      (GstBaseCameraSrc *self);
@@ -131,7 +125,6 @@ struct _GstBaseCameraSrcClass
   gboolean (*start_capture) (GstBaseCameraSrc * src);
   void (*stop_capture) (GstBaseCameraSrc * src);
 
-
   gpointer _gst_reserved[GST_PADDING_LARGE];
 };
 

gst/camerabin2/gstv4l2camerasrc.c

@@ -199,9 +199,6 @@ gst_v4l2_camera_src_vidsrc_probe (GstPad * pad, GstBuffer * buffer,
 /**
  * gst_v4l2_camera_src_construct_pipeline:
  * @bcamsrc: camerasrc object
- * @vfsrc: viewfinder src element (returned by reference)
- * @imgsrc: image src element (returned by reference)
- * @vidsrc: video src element (returned by reference)
  *
  * This function creates and links the elements of the camerasrc bin
  * videosrc ! cspconv ! capsfilter ! crop ! scale ! capsfilter ! tee ! ..
@@ -209,8 +206,7 @@ gst_v4l2_camera_src_vidsrc_probe (GstPad * pad, GstBuffer * buffer,
  * Returns: TRUE, if elements were successfully created, FALSE otherwise
  */
 static gboolean
-gst_v4l2_camera_src_construct_pipeline (GstBaseCameraSrc * bcamsrc,
-    GstPad ** vfsrc, GstPad ** imgsrc, GstPad ** vidsrc)
+gst_v4l2_camera_src_construct_pipeline (GstBaseCameraSrc * bcamsrc)
 {
   GstV4l2CameraSrc *self = GST_V4L2_CAMERA_SRC (bcamsrc);
   GstBin *cbin = GST_BIN (bcamsrc);
@@ -265,9 +261,17 @@ gst_v4l2_camera_src_construct_pipeline (GstBaseCameraSrc * bcamsrc,
   gst_pad_add_buffer_probe (self->tee_video_srcpad,
       G_CALLBACK (gst_v4l2_camera_src_vidsrc_probe), self);
 
-  *vfsrc = self->tee_vf_srcpad;
-  *imgsrc = self->tee_image_srcpad;
-  *vidsrc = self->tee_video_srcpad;
+  /* hook-up the ghostpads */
+  gst_ghost_pad_set_target (GST_GHOST_PAD (self->vfsrc), self->tee_vf_srcpad);
+  gst_ghost_pad_set_target (GST_GHOST_PAD (self->imgsrc),
+      self->tee_image_srcpad);
+  gst_ghost_pad_set_target (GST_GHOST_PAD (self->vidsrc),
+      self->tee_video_srcpad);
+
+  gst_pad_set_active (self->vfsrc, TRUE);
+  gst_pad_set_active (self->imgsrc, TRUE);      /* XXX ??? */
+  gst_pad_set_active (self->vidsrc, TRUE);      /* XXX ??? */
+
 
   ret = TRUE;
 done:
@@ -1036,6 +1040,22 @@ static void
 gst_v4l2_camera_src_init (GstV4l2CameraSrc * self,
     GstV4l2CameraSrcClass * klass)
 {
+  self->vfsrc =
+      gst_ghost_pad_new_no_target (GST_BASE_CAMERA_SRC_VIEWFINDER_PAD_NAME,
+      GST_PAD_SRC);
+  gst_element_add_pad (GST_ELEMENT (self), self->vfsrc);
+
+  self->imgsrc =
+      gst_ghost_pad_new_no_target (GST_BASE_CAMERA_SRC_IMAGE_PAD_NAME,
+      GST_PAD_SRC);
+  gst_element_add_pad (GST_ELEMENT (self), self->imgsrc);
+
+  self->vidsrc =
+      gst_ghost_pad_new_no_target (GST_BASE_CAMERA_SRC_VIDEO_PAD_NAME,
+      GST_PAD_SRC);
+  gst_element_add_pad (GST_ELEMENT (self), self->vidsrc);
+
+
   /* TODO where are variables reset? */
   self->image_capture_count = 0;
   self->video_rec_status = GST_VIDEO_RECORDING_STATUS_DONE;

gst/camerabin2/gstv4l2camerasrc.h

@@ -57,6 +57,10 @@ struct _GstV4l2CameraSrc
 {
   GstBaseCameraSrc parent;
 
+  GstPad *vfsrc;
+  GstPad *imgsrc;
+  GstPad *vidsrc;
+
   /* video recording controls */
   gint video_rec_status;