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camerabin2: Add custom filter properties

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Adds custom filter properties for camerabin2. Custom filters
can be added to video/image/preview branches.
This commit is contained in:
Thiago Santos 2011-01-26 15:27:19 -03:00
parent 4724ecfd06
commit 675632b382
2 changed files with 129 additions and 1 deletions
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123
gst/camerabin2/gstcamerabin2.c
View file

@ -40,7 +40,10 @@
* have room to set the destination filename).
* There is no problem to leave it on playing after an EOS, so
* no action is taken on stop-capture.
*
* - TODO: What happens when an error pops?
* - TODO: Should we split properties in image/video variants? We already do so
* for some of them
*
*
*/
@ -69,7 +72,10 @@ enum
PROP_VIDEO_CAPTURE_CAPS,
PROP_POST_PREVIEWS,
PROP_PREVIEW_CAPS,
PROP_VIDEO_ENCODING_PROFILE
PROP_VIDEO_ENCODING_PROFILE,
PROP_IMAGE_FILTER,
PROP_VIDEO_FILTER,
PROP_VIEWFINDER_FILTER
};
enum
@ -278,6 +284,20 @@ gst_camera_bin_dispose (GObject * object)
if (camerabin->imagebin_capsfilter)
gst_object_unref (camerabin->imagebin_capsfilter);
if (camerabin->video_filter)
gst_object_unref (camerabin->video_filter);
if (camerabin->image_filter)
gst_object_unref (camerabin->image_filter);
if (camerabin->viewfinder_filter)
gst_object_unref (camerabin->viewfinder_filter);
if (camerabin->user_video_filter)
gst_object_unref (camerabin->user_video_filter);
if (camerabin->user_image_filter)
gst_object_unref (camerabin->user_image_filter);
if (camerabin->user_viewfinder_filter)
gst_object_unref (camerabin->user_viewfinder_filter);
if (camerabin->video_profile)
gst_encoding_profile_unref (camerabin->video_profile);
@ -394,6 +414,25 @@ gst_camera_bin_class_init (GstCameraBinClass * klass)
GST_TYPE_ENCODING_PROFILE,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (object_class, PROP_IMAGE_FILTER,
g_param_spec_object ("image-filter", "Image filter",
"The element that will process captured image frames. (Should be"
" set on NULL state)",
GST_TYPE_ELEMENT, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (object_class, PROP_VIDEO_FILTER,
g_param_spec_object ("video-filter", "Video filter",
"The element that will process captured video frames. (Should be"
" set on NULL state)",
GST_TYPE_ELEMENT, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (object_class, PROP_VIEWFINDER_FILTER,
g_param_spec_object ("viewfinder-filter", "Viewfinder filter",
"The element that will process frames going to the viewfinder."
" (Should be set on NULL state)",
GST_TYPE_ELEMENT, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
/**
* GstCameraBin::capture-start:
* @camera: the camera bin element
@ -479,6 +518,48 @@ gst_camera_bin_handle_message (GstBin * bin, GstMessage * message)
GST_BIN_CLASS (parent_class)->handle_message (bin, message);
}
/*
* Transforms:
* ... ! previous_element [ ! current_filter ] ! next_element ! ...
*
* into:
* ... ! previous_element [ ! new_filter ] ! next_element ! ...
*
* Where current_filter and new_filter might or might not be NULL
*/
static void
gst_camera_bin_check_and_replace_filter (GstCameraBin * camera,
GstElement ** current_filter, GstElement * new_filter,
GstElement * previous_element, GstElement * next_element)
{
if (*current_filter == new_filter) {
GST_DEBUG_OBJECT (camera, "Current filter is the same as the previous, "
"no switch needed.");
return;
}
GST_DEBUG_OBJECT (camera, "Replacing current filter (%s) with new filter "
"(%s)", *current_filter ? GST_ELEMENT_NAME (*current_filter) : "null",
new_filter ? GST_ELEMENT_NAME (new_filter) : "null");
if (*current_filter) {
gst_bin_remove (GST_BIN_CAST (camera), *current_filter);
gst_object_unref (*current_filter);
*current_filter = NULL;
} else {
/* unlink the pads */
gst_element_unlink (previous_element, next_element);
}
if (new_filter) {
*current_filter = gst_object_ref (new_filter);
gst_bin_add (GST_BIN_CAST (camera), gst_object_ref (new_filter));
gst_element_link_many (previous_element, new_filter, next_element, NULL);
} else {
gst_element_link (previous_element, next_element);
}
}
/**
* gst_camera_bin_create_elements:
* @param camera: the #GstCameraBin
@ -612,6 +693,16 @@ gst_camera_bin_create_elements (GstCameraBin * camera)
"sink");
}
gst_camera_bin_check_and_replace_filter (camera, &camera->image_filter,
camera->user_image_filter, camera->imagebin_queue,
camera->imagebin_capsfilter);
gst_camera_bin_check_and_replace_filter (camera, &camera->video_filter,
camera->user_video_filter, camera->videobin_queue,
camera->videobin_capsfilter);
gst_camera_bin_check_and_replace_filter (camera, &camera->viewfinder_filter,
camera->user_viewfinder_filter, camera->viewfinderbin_queue,
camera->viewfinderbin_capsfilter);
camera->elements_created = TRUE;
return TRUE;
}
@ -763,6 +854,24 @@ gst_camera_bin_set_property (GObject * object, guint prop_id,
camera->video_profile =
(GstEncodingProfile *) gst_value_dup_mini_object (value);
break;
case PROP_IMAGE_FILTER:
if (camera->user_image_filter)
g_object_unref (camera->user_image_filter);
camera->user_image_filter = g_value_dup_object (value);
break;
case PROP_VIDEO_FILTER:
if (camera->user_video_filter)
g_object_unref (camera->user_video_filter);
camera->user_video_filter = g_value_dup_object (value);
break;
case PROP_VIEWFINDER_FILTER:
if (camera->user_viewfinder_filter)
g_object_unref (camera->user_viewfinder_filter);
camera->user_viewfinder_filter = g_value_dup_object (value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
@ -851,6 +960,18 @@ gst_camera_bin_get_property (GObject * object, guint prop_id,
(GstMiniObject *) camera->video_profile);
}
break;
case PROP_VIDEO_FILTER:
if (camera->video_filter)
g_value_set_object (value, camera->video_filter);
break;
case PROP_IMAGE_FILTER:
if (camera->image_filter)
g_value_set_object (value, camera->image_filter);
break;
case PROP_VIEWFINDER_FILTER:
if (camera->viewfinder_filter)
g_value_set_object (value, camera->viewfinder_filter);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;

7
gst/camerabin2/gstcamerabin2.h
View file

@ -55,6 +55,13 @@ struct _GstCameraBin
GstElement *imagebin_queue;
GstElement *imagebin_capsfilter;
GstElement *video_filter;
GstElement *image_filter;
GstElement *viewfinder_filter;
GstElement *user_video_filter;
GstElement *user_image_filter;
GstElement *user_viewfinder_filter;
/* Index of the auto incrementing file index for video recordings */
gint video_index;