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camerabin: Forward tag events to preview pipeline

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Forward tag events from image pipeline to preview pipeline so
that preview elements can use capture tags information
This commit is contained in:
Thiago Santos 2010-06-21 09:34:43 -03:00
parent f0f8df1a30
commit 9c3692cc4f
3 changed files with 95 additions and 45 deletions
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27
gst/camerabin/camerabinpreview.c
View file

@ -287,3 +287,30 @@ no_pipeline:
return NULL;
}
}
/**
* gst_camerabin_preview_send_event:
* @camera: the #GstCameraBin
* @evt: The #GstEvent to be pushed, takes ownership
*
* Pushes an event to the preview pipeline.
*
* Returns: True if the event was handled
*/
gboolean
gst_camerabin_preview_send_event (GstCameraBin * camera, GstElement * pipeline,
GstEvent * evt)
{
GstElement *src;
src = gst_bin_get_by_name (GST_BIN (pipeline), "prev_src");
if (!src) {
GST_WARNING ("Preview pipeline doesn't have src element, can't push event");
gst_event_unref (evt);
return FALSE;
}
GST_DEBUG_OBJECT (camera, "Pushing event %p to preview pipeline", evt);
return gst_element_send_event (src, evt);
}

3
gst/camerabin/camerabinpreview.h
View file

@ -35,5 +35,8 @@ void gst_camerabin_preview_destroy_pipeline (GstCameraBin * camera,
GstBuffer *gst_camerabin_preview_convert (GstCameraBin * camera,
GstElement * pipeline, GstBuffer * buf);
gboolean gst_camerabin_preview_send_event (GstCameraBin * camera,
GstElement * pipeline, GstEvent * event);
G_END_DECLS
#endif /* __CAMERABINPREVIEW_H__ */

28
gst/camerabin/gstcamerabin.c
View file

@ -261,7 +261,7 @@ static void
camerabin_pad_blocked (GstPad * pad, gboolean blocked, gpointer user_data);
static gboolean
gst_camerabin_have_img_buffer (GstPad * pad, GstBuffer * buffer,
gst_camerabin_have_img_buffer (GstPad * pad, GstMiniObject * obj,
gpointer u_data);
static gboolean
gst_camerabin_have_vid_buffer (GstPad * pad, GstBuffer * buffer,
@ -715,7 +715,7 @@ camerabin_create_elements (GstCameraBin * camera)
camera->pad_src_img =
gst_element_get_request_pad (camera->src_out_sel, "src%d");
gst_pad_add_buffer_probe (camera->pad_src_img,
gst_pad_add_data_probe (camera->pad_src_img,
G_CALLBACK (gst_camerabin_have_img_buffer), camera);
/* Add queue leading to image bin */
@ -1713,10 +1713,13 @@ gst_camerabin_send_preview (GstCameraBin * camera, GstBuffer * buffer)
* Generates and sends preview image as gst message if requested.
*/
static gboolean
gst_camerabin_have_img_buffer (GstPad * pad, GstBuffer * buffer,
gst_camerabin_have_img_buffer (GstPad * pad, GstMiniObject * obj,
gpointer u_data)
{
GstCameraBin *camera = (GstCameraBin *) u_data;
if (GST_IS_BUFFER (obj)) {
GstBuffer *buffer = GST_BUFFER_CAST (obj);
GstStructure *fn_ev_struct = NULL;
gboolean ret = TRUE;
GstPad *os_sink = NULL;
@ -1751,7 +1754,7 @@ gst_camerabin_have_img_buffer (GstPad * pad, GstBuffer * buffer,
G_CALLBACK (gst_camerabin_have_src_buffer), camera);
gst_object_unref (os_sink);
done:
done:
/* HACK: v4l2camsrc changes to view finder resolution automatically
after one captured still image */
@ -1763,6 +1766,23 @@ done:
GST_DEBUG_OBJECT (camera, "switched back to viewfinder");
return TRUE;
} else if (GST_IS_EVENT (obj)) {
GstEvent *event = GST_EVENT_CAST (obj);
GST_DEBUG_OBJECT (camera, "Received event in image pipeline");
/* forward tag events to preview pipeline */
if (camera->preview_caps && GST_EVENT_TYPE (event) == GST_EVENT_TAG) {
GstElement *pipeline;
pipeline = (camera->mode == MODE_IMAGE) ?
camera->preview_pipeline : camera->video_preview_pipeline;
gst_camerabin_preview_send_event (camera, pipeline,
gst_event_ref (event));
}
}
return TRUE;
}