/**
* gst_camerabin_create_and_add_element:
* @bin: tries adding an element to this bin
* @elem_name: name of the element to be created
*
* Creates an element according to given name and
* adds it to given @bin. Looks for an unconnected src pad
* from the @bin and links the element to it.
*
* Returns: pointer to the new element if successful, NULL otherwise.
*/
GstElement *
gst_camerabin_create_and_add_element (GstBin * bin, const gchar * elem_name)
{
GstElement *new_elem = NULL;
new_elem = gst_element_factory_make (elem_name, NULL);
if (!new_elem) {
GST_ELEMENT_ERROR (bin, CORE, MISSING_PLUGIN, (NULL),
("could not create \"%s\" element.", elem_name));
} else if (!gst_camerabin_add_element (bin, new_elem)) {
new_elem = NULL;
}
return new_elem;
}
/**
* gst_camerabin_create_and_add_element:
* @bin: tries adding an element to this bin
* @elem_name: name of the element to be created
* @instance_name: name of the instance of the element to be created
*
* Creates an element according to given name and
* adds it to given @bin. Looks for an unconnected src pad
* from the @bin and links the element to it.
*
* Returns: pointer to the new element if successful, NULL otherwise.
*/
GstElement *
gst_camerabin_create_and_add_element (GstBin * bin, const gchar * elem_name,
const gchar * instance_name)
{
GstElement *new_elem;
g_return_val_if_fail (bin, FALSE);
g_return_val_if_fail (elem_name, FALSE);
new_elem = gst_element_factory_make (elem_name, instance_name);
if (!new_elem) {
GST_ELEMENT_ERROR (bin, CORE, MISSING_PLUGIN,
(_("Missing element '%s' - check your GStreamer installation."),
elem_name), (NULL));
} else if (!gst_camerabin_add_element (bin, new_elem)) {
new_elem = NULL;
}
return new_elem;
}
/**
* gst_wrapper_camera_bin_src_construct_pipeline:
* @bcamsrc: camerasrc object
*
* This function creates and links the elements of the camerasrc bin
* videosrc ! cspconv ! srcfilter ! cspconv ! capsfilter ! crop ! scale ! \
* capsfilter ! tee name=t
* t. ! ... (viewfinder pad)
* t. ! output-selector name=outsel
* outsel. ! (image pad)
* outsel. ! (video pad)
*
* Returns: TRUE, if elements were successfully created, FALSE otherwise
*/
static gboolean
gst_wrapper_camera_bin_src_construct_pipeline (GstBaseCameraSrc * bcamsrc)
{
GstWrapperCameraBinSrc *self = GST_WRAPPER_CAMERA_BIN_SRC (bcamsrc);
GstBin *cbin = GST_BIN (bcamsrc);
GstElement *tee;
GstElement *filter_csp;
GstElement *src_csp;
GstElement *capsfilter;
gboolean ret = FALSE;
GstPad *vf_pad;
GstPad *tee_capture_pad;
GstPad *src_caps_src_pad;
/* checks and adds a new video src if needed */
if (!check_and_replace_src (self))
goto done;
if (!self->elements_created) {
GST_DEBUG_OBJECT (self, "constructing pipeline");
if (!gst_camerabin_create_and_add_element (cbin, "videoconvert",
"src-videoconvert"))
goto done;
if (self->app_vid_filter) {
self->video_filter = gst_object_ref (self->app_vid_filter);
if (!gst_camerabin_add_element (cbin, self->video_filter))
goto done;
if (!gst_camerabin_create_and_add_element (cbin, "videoconvert",
"filter-videoconvert"))
goto done;
}
if (!(self->src_filter =
gst_camerabin_create_and_add_element (cbin, "capsfilter",
"src-capsfilter")))
goto done;
/* attach to notify::caps on the first capsfilter and use a callback
* to recalculate the zoom properties when these caps change and to
* propagate the caps to the second capsfilter */
src_caps_src_pad = gst_element_get_static_pad (self->src_filter, "src");
g_signal_connect (src_caps_src_pad, "notify::caps",
G_CALLBACK (gst_wrapper_camera_bin_src_caps_cb), self);
gst_object_unref (src_caps_src_pad);
if (!(self->src_zoom_crop =
gst_camerabin_create_and_add_element (cbin, "videocrop",
"zoom-crop")))
goto done;
if (!(self->src_zoom_scale =
gst_camerabin_create_and_add_element (cbin, "videoscale",
"zoom-scale")))
goto done;
if (!(self->src_zoom_filter =
gst_camerabin_create_and_add_element (cbin, "capsfilter",
"zoom-capsfilter")))
goto done;
if (!(tee =
gst_camerabin_create_and_add_element (cbin, "tee",
"camerasrc-tee")))
goto done;
/* viewfinder pad */
vf_pad = gst_element_get_request_pad (tee, "src_%u");
g_object_set (tee, "alloc-pad", vf_pad, NULL);
gst_ghost_pad_set_target (GST_GHOST_PAD (self->vfsrc), vf_pad);
gst_object_unref (vf_pad);
/* image/video pad from tee */
tee_capture_pad = gst_element_get_request_pad (tee, "src_%u");
self->output_selector =
gst_element_factory_make ("output-selector", "outsel");
g_object_set (self->output_selector, "pad-negotiation-mode", 2, NULL);
gst_bin_add (GST_BIN (self), self->output_selector);
{
GstPad *pad = gst_element_get_static_pad (self->output_selector, "sink");
/* check return TODO */
gst_pad_link (tee_capture_pad, pad);
gst_object_unref (pad);
}
gst_object_unref (tee_capture_pad);
/* Create the 2 output pads for video and image */
self->outsel_vidpad =
gst_element_get_request_pad (self->output_selector, "src_%u");
self->outsel_imgpad =
gst_element_get_request_pad (self->output_selector, "src_%u");
g_assert (self->outsel_vidpad != NULL);
g_assert (self->outsel_imgpad != NULL);
gst_pad_add_probe (self->outsel_imgpad, GST_PAD_PROBE_TYPE_BUFFER,
gst_wrapper_camera_bin_src_imgsrc_probe, gst_object_ref (self),
gst_object_unref);
gst_pad_add_probe (self->outsel_vidpad, GST_PAD_PROBE_TYPE_BUFFER,
gst_wrapper_camera_bin_src_vidsrc_probe, gst_object_ref (self),
gst_object_unref);
gst_ghost_pad_set_target (GST_GHOST_PAD (self->imgsrc),
self->outsel_imgpad);
gst_ghost_pad_set_target (GST_GHOST_PAD (self->vidsrc),
self->outsel_vidpad);
if (bcamsrc->mode == MODE_IMAGE) {
g_object_set (self->output_selector, "active-pad", self->outsel_imgpad,
NULL);
} else {
g_object_set (self->output_selector, "active-pad", self->outsel_vidpad,
NULL);
}
gst_pad_set_active (self->vfsrc, TRUE);
gst_pad_set_active (self->imgsrc, TRUE); /* XXX ??? */
gst_pad_set_active (self->vidsrc, TRUE); /* XXX ??? */
}
/* Do this even if pipeline is constructed */
if (self->video_filter) {
/* check if we need to replace the current one */
if (self->video_filter != self->app_vid_filter) {
gst_bin_remove (cbin, self->video_filter);
gst_object_unref (self->video_filter);
self->video_filter = NULL;
filter_csp = gst_bin_get_by_name (cbin, "filter-videoconvert");
gst_bin_remove (cbin, filter_csp);
gst_object_unref (filter_csp);
filter_csp = NULL;
}
}
if (!self->video_filter) {
if (self->app_vid_filter) {
self->video_filter = gst_object_ref (self->app_vid_filter);
filter_csp = gst_element_factory_make ("videoconvert",
"filter-videoconvert");
gst_bin_add_many (cbin, self->video_filter, filter_csp, NULL);
src_csp = gst_bin_get_by_name (cbin, "src-videoconvert");
capsfilter = gst_bin_get_by_name (cbin, "src-capsfilter");
if (gst_pad_is_linked (gst_element_get_static_pad (src_csp, "src")))
gst_element_unlink (src_csp, capsfilter);
if (!gst_element_link_many (src_csp, self->video_filter, filter_csp,
capsfilter, NULL))
goto done;
}
}
ret = TRUE;
self->elements_created = TRUE;
done:
return ret;
}
/**
* gst_wrapper_camera_bin_src_construct_pipeline:
* @bcamsrc: camerasrc object
*
* This function creates and links the elements of the camerasrc bin
* videosrc ! cspconv ! capsfilter ! crop ! scale ! capsfilter ! tee name=t !
* t. ! ... (viewfinder pad)
* t. ! output-selector name=outsel
* outsel. ! (image pad)
* outsel. ! (video pad)
*
* Returns: TRUE, if elements were successfully created, FALSE otherwise
*/
static gboolean
gst_wrapper_camera_bin_src_construct_pipeline (GstBaseCameraSrc * bcamsrc)
{
GstWrapperCameraBinSrc *self = GST_WRAPPER_CAMERA_BIN_SRC (bcamsrc);
GstBin *cbin = GST_BIN (bcamsrc);
GstElement *tee;
gboolean ret = FALSE;
GstElement *videoscale;
GstPad *vf_pad;
GstPad *tee_capture_pad;
if (self->elements_created)
return TRUE;
GST_DEBUG_OBJECT (self, "constructing pipeline");
/* Add application set or default video src element */
if (!(self->src_vid_src = gst_camerabin_setup_default_element (cbin,
self->app_vid_src, "autovideosrc", DEFAULT_VIDEOSRC))) {
self->src_vid_src = NULL;
goto done;
} else {
if (!gst_camerabin_add_element (cbin, self->src_vid_src)) {
goto done;
}
}
/* we lost the reference */
self->app_vid_src = NULL;
/* add a buffer probe to the src elemento to drop EOS from READY->NULL */
{
GstPad *pad;
pad = gst_element_get_static_pad (self->src_vid_src, "src");
self->src_event_probe_id = gst_pad_add_event_probe (pad,
(GCallback) src_event_probe, self);
gst_object_unref (pad);
}
if (!gst_camerabin_create_and_add_element (cbin, "ffmpegcolorspace"))
goto done;
if (!(self->src_filter =
gst_camerabin_create_and_add_element (cbin, "capsfilter")))
goto done;
if (!(self->src_zoom_crop =
gst_camerabin_create_and_add_element (cbin, "videocrop")))
goto done;
if (!(self->src_zoom_scale =
gst_camerabin_create_and_add_element (cbin, "videoscale")))
goto done;
if (!(self->src_zoom_filter =
gst_camerabin_create_and_add_element (cbin, "capsfilter")))
goto done;
if (!(tee = gst_camerabin_create_and_add_element (cbin, "tee")))
goto done;
/* viewfinder pad */
vf_pad = gst_element_get_request_pad (tee, "src%d");
g_object_set (tee, "alloc-pad", vf_pad, NULL);
gst_object_unref (vf_pad);
/* the viewfinder should always work, so we add some converters to it */
if (!gst_camerabin_create_and_add_element (cbin, "ffmpegcolorspace"))
goto done;
if (!(videoscale = gst_camerabin_create_and_add_element (cbin, "videoscale")))
goto done;
/* image/video pad from tee */
tee_capture_pad = gst_element_get_request_pad (tee, "src%d");
self->output_selector =
gst_element_factory_make ("output-selector", "outsel");
gst_bin_add (GST_BIN (self), self->output_selector);
{
GstPad *pad = gst_element_get_static_pad (self->output_selector, "sink");
/* check return TODO */
gst_pad_link (tee_capture_pad, pad);
gst_object_unref (pad);
}
gst_object_unref (tee_capture_pad);
/* Create the 2 output pads for video and image */
self->outsel_vidpad =
gst_element_get_request_pad (self->output_selector, "src%d");
self->outsel_imgpad =
gst_element_get_request_pad (self->output_selector, "src%d");
g_assert (self->outsel_vidpad != NULL);
g_assert (self->outsel_imgpad != NULL);
gst_pad_add_buffer_probe (self->outsel_imgpad,
G_CALLBACK (gst_wrapper_camera_bin_src_imgsrc_probe), self);
gst_pad_add_buffer_probe (self->outsel_vidpad,
G_CALLBACK (gst_wrapper_camera_bin_src_vidsrc_probe), self);
gst_ghost_pad_set_target (GST_GHOST_PAD (self->imgsrc), self->outsel_imgpad);
gst_ghost_pad_set_target (GST_GHOST_PAD (self->vidsrc), self->outsel_vidpad);
if (bcamsrc->mode == MODE_IMAGE) {
g_object_set (self->output_selector, "active-pad", self->outsel_imgpad,
NULL);
} else {
g_object_set (self->output_selector, "active-pad", self->outsel_vidpad,
NULL);
}
/* hook-up the vf ghostpad */
vf_pad = gst_element_get_static_pad (videoscale, "src");
gst_ghost_pad_set_target (GST_GHOST_PAD (self->vfsrc), vf_pad);
gst_object_unref (vf_pad);
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;
self->elements_created = TRUE;
done:
return ret;
}
/**
* gst_wrapper_camera_bin_src_construct_pipeline:
* @bcamsrc: camerasrc object
*
* This function creates and links the elements of the camerasrc bin
* videosrc ! cspconv ! srcfilter ! cspconv ! capsfilter ! crop ! scale ! \
* capsfilter ! tee name=t
* t. ! ... (viewfinder pad)
* t. ! output-selector name=outsel
* outsel. ! (image pad)
* outsel. ! (video pad)
*
* Returns: TRUE, if elements were successfully created, FALSE otherwise
*/
static gboolean
gst_wrapper_camera_bin_src_construct_pipeline (GstBaseCameraSrc * bcamsrc)
{
GstWrapperCameraBinSrc *self = GST_WRAPPER_CAMERA_BIN_SRC (bcamsrc);
GstBin *cbin = GST_BIN (bcamsrc);
GstElement *tee;
GstElement *filter_csp;
GstElement *src_csp;
GstElement *capsfilter;
gboolean ret = FALSE;
GstPad *vf_pad;
GstPad *tee_capture_pad;
GstPad *src_caps_src_pad;
if (!self->elements_created) {
GST_DEBUG_OBJECT (self, "constructing pipeline");
/* Add application set or default video src element */
if (!(self->src_vid_src = gst_camerabin_setup_default_element (cbin,
self->app_vid_src, "autovideosrc", DEFAULT_VIDEOSRC,
"camerasrc-real-src"))) {
self->src_vid_src = NULL;
goto done;
} else {
if (!gst_camerabin_add_element (cbin, self->src_vid_src)) {
goto done;
}
}
/* we lost the reference */
self->app_vid_src = NULL;
/* we listen for changes to max-zoom in the video src so that
* we can proxy them to the basecamerasrc property */
if (g_object_class_find_property (G_OBJECT_GET_CLASS (bcamsrc), "max-zoom")) {
g_signal_connect (G_OBJECT (self->src_vid_src), "notify::max-zoom",
(GCallback) gst_wrapper_camera_bin_src_max_zoom_cb, bcamsrc);
}
/* add a buffer probe to the src elemento to drop EOS from READY->NULL */
{
GstPad *pad;
pad = gst_element_get_static_pad (self->src_vid_src, "src");
self->src_event_probe_id = gst_pad_add_event_probe (pad,
(GCallback) gst_wrapper_camera_src_src_event_probe, self);
gst_object_unref (pad);
}
if (!gst_camerabin_create_and_add_element (cbin, "ffmpegcolorspace",
"src-colorspace"))
goto done;
if (!(self->src_filter =
gst_camerabin_create_and_add_element (cbin, "capsfilter",
"src-capsfilter")))
goto done;
/* attach to notify::caps on the first capsfilter and use a callback
* to recalculate the zoom properties when these caps change and to
* propagate the caps to the second capsfilter */
src_caps_src_pad = gst_element_get_static_pad (self->src_filter, "src");
g_signal_connect (src_caps_src_pad, "notify::caps",
G_CALLBACK (gst_wrapper_camera_bin_src_caps_cb), self);
gst_object_unref (src_caps_src_pad);
if (!(self->src_zoom_crop =
gst_camerabin_create_and_add_element (cbin, "videocrop",
"zoom-crop")))
goto done;
if (!(self->src_zoom_scale =
gst_camerabin_create_and_add_element (cbin, "videoscale",
"zoom-scale")))
goto done;
if (!(self->src_zoom_filter =
gst_camerabin_create_and_add_element (cbin, "capsfilter",
"zoom-capsfilter")))
goto done;
if (!(tee =
gst_camerabin_create_and_add_element (cbin, "tee",
"camerasrc-tee")))
goto done;
/* viewfinder pad */
vf_pad = gst_element_get_request_pad (tee, "src%d");
g_object_set (tee, "alloc-pad", vf_pad, NULL);
gst_ghost_pad_set_target (GST_GHOST_PAD (self->vfsrc), vf_pad);
gst_object_unref (vf_pad);
/* image/video pad from tee */
tee_capture_pad = gst_element_get_request_pad (tee, "src%d");
self->output_selector =
gst_element_factory_make ("output-selector", "outsel");
g_object_set (self->output_selector, "pad-negotiation-mode", 0, NULL);
gst_bin_add (GST_BIN (self), self->output_selector);
{
GstPad *pad = gst_element_get_static_pad (self->output_selector, "sink");
/* check return TODO */
gst_pad_link (tee_capture_pad, pad);
gst_object_unref (pad);
}
gst_object_unref (tee_capture_pad);
/* Create the 2 output pads for video and image */
self->outsel_vidpad =
gst_element_get_request_pad (self->output_selector, "src%d");
self->outsel_imgpad =
gst_element_get_request_pad (self->output_selector, "src%d");
g_assert (self->outsel_vidpad != NULL);
g_assert (self->outsel_imgpad != NULL);
gst_pad_add_buffer_probe (self->outsel_imgpad,
G_CALLBACK (gst_wrapper_camera_bin_src_imgsrc_probe), self);
gst_pad_add_buffer_probe (self->outsel_vidpad,
G_CALLBACK (gst_wrapper_camera_bin_src_vidsrc_probe), self);
gst_ghost_pad_set_target (GST_GHOST_PAD (self->imgsrc),
self->outsel_imgpad);
gst_ghost_pad_set_target (GST_GHOST_PAD (self->vidsrc),
self->outsel_vidpad);
if (bcamsrc->mode == MODE_IMAGE) {
g_object_set (self->output_selector, "active-pad", self->outsel_imgpad,
NULL);
} else {
g_object_set (self->output_selector, "active-pad", self->outsel_vidpad,
NULL);
}
gst_pad_set_active (self->vfsrc, TRUE);
gst_pad_set_active (self->imgsrc, TRUE); /* XXX ??? */
gst_pad_set_active (self->vidsrc, TRUE); /* XXX ??? */
}
/* Do this even if pipeline is constructed */
if (self->video_filter) {
/* check if we need to replace the current one */
if (self->video_filter != self->app_vid_filter) {
gst_bin_remove (cbin, self->video_filter);
gst_object_unref (self->video_filter);
self->video_filter = NULL;
filter_csp = gst_bin_get_by_name (cbin, "filter-colorspace");
gst_bin_remove (cbin, filter_csp);
gst_object_unref (filter_csp);
filter_csp = NULL;
}
}
if (!self->video_filter) {
if (self->app_vid_filter) {
self->video_filter = gst_object_ref (self->app_vid_filter);
filter_csp = gst_element_factory_make ("ffmpegcolorspace",
"filter-colorspace");
gst_bin_add_many (cbin, self->video_filter, filter_csp, NULL);
src_csp = gst_bin_get_by_name (cbin, "src-colorspace");
capsfilter = gst_bin_get_by_name (cbin, "src-capsfilter");
if (gst_pad_is_linked (gst_element_get_static_pad (src_csp, "src")))
gst_element_unlink (src_csp, capsfilter);
if (!gst_element_link_many (src_csp, self->video_filter, filter_csp,
capsfilter, NULL))
goto done;
}
}
ret = TRUE;
self->elements_created = TRUE;
done:
return ret;
}
