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ccextractor: Add property to remove caption meta from the outgoing video buffers

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This is disabled by default to keep backwards compatibility.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gst-plugins-bad/-/merge_requests/1371>
This commit is contained in:
Sebastian Dröge 2020-06-24 13:33:39 +03:00 committed by GStreamer Merge Bot
parent 82189d6859
commit f694956511
3 changed files with 84 additions and 1 deletions
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14
docs/plugins/gst_plugins_cache.json
View file

@ -2864,6 +2864,20 @@
"presence": "always"
}
},
"properties": {
"remove-caption-meta": {
"blurb": "Remove caption meta from outgoing video buffers",
"conditionally-available": false,
"construct": false,
"construct-only": false,
"controllable": false,
"default": "false",
"mutable": "null",
"readable": true,
"type": "gboolean",
"writable": true
}
},
"rank": "none",
"signals": {}
},

69
ext/closedcaption/gstccextractor.c
View file

@ -44,6 +44,7 @@ GST_DEBUG_CATEGORY_STATIC (gst_cc_extractor_debug);
enum
{
PROP_0,
PROP_REMOVE_CAPTION_META,
};
static GstStaticPadTemplate sinktemplate = GST_STATIC_PAD_TEMPLATE ("sink",
@ -75,8 +76,12 @@ static GstFlowReturn gst_cc_extractor_chain (GstPad * pad, GstObject * parent,
GstBuffer * buf);
static GstStateChangeReturn gst_cc_extractor_change_state (GstElement *
element, GstStateChange transition);
static void gst_cc_extractor_finalize (GObject * self);
static void gst_cc_extractor_finalize (GObject * self);
static void gst_cc_extractor_set_property (GObject * self, guint prop_id,
const GValue * value, GParamSpec * pspec);
static void gst_cc_extractor_get_property (GObject * self, guint prop_id,
GValue * value, GParamSpec * pspec);
static void
gst_cc_extractor_class_init (GstCCExtractorClass * klass)
@ -88,6 +93,22 @@ gst_cc_extractor_class_init (GstCCExtractorClass * klass)
gstelement_class = (GstElementClass *) klass;
gobject_class->finalize = gst_cc_extractor_finalize;
gobject_class->set_property = gst_cc_extractor_set_property;
gobject_class->get_property = gst_cc_extractor_get_property;
/**
* GstCCExtractor:remove-caption-meta
*
* Selects whether the #GstVideoCaptionMeta should be removed from the
* outgoing video buffers or whether it should be kept.
*
* Since: 1.18
*/
g_object_class_install_property (G_OBJECT_CLASS (klass),
PROP_REMOVE_CAPTION_META, g_param_spec_boolean ("remove-caption-meta",
"Remove Caption Meta",
"Remove caption meta from outgoing video buffers", FALSE,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
gstelement_class->change_state =
GST_DEBUG_FUNCPTR (gst_cc_extractor_change_state);
@ -386,6 +407,15 @@ gst_cc_extractor_handle_meta (GstCCExtractor * filter, GstBuffer * buf,
filter->captionpad, flow);
}
static gboolean
remove_caption_meta (GstBuffer * buffer, GstMeta ** meta, gpointer user_data)
{
if ((*meta)->info->api == GST_VIDEO_CAPTION_META_API_TYPE)
*meta = NULL;
return TRUE;
}
static GstFlowReturn
gst_cc_extractor_chain (GstPad * pad, GstObject * parent, GstBuffer * buf)
{
@ -409,6 +439,11 @@ gst_cc_extractor_chain (GstPad * pad, GstObject * parent, GstBuffer * buf)
return flow;
}
if (filter->remove_caption_meta) {
buf = gst_buffer_make_writable (buf);
gst_buffer_foreach_meta (buf, remove_caption_meta, NULL);
}
/* Push the buffer downstream and return the combined flow return */
return gst_flow_combiner_update_pad_flow (filter->combiner, filter->srcpad,
gst_pad_push (filter->srcpad, buf));
@ -458,3 +493,35 @@ gst_cc_extractor_finalize (GObject * object)
G_OBJECT_CLASS (parent_class)->finalize (object);
}
static void
gst_cc_extractor_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec)
{
GstCCExtractor *filter = GST_CCEXTRACTOR (object);
switch (prop_id) {
case PROP_REMOVE_CAPTION_META:
filter->remove_caption_meta = g_value_get_boolean (value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gst_cc_extractor_get_property (GObject * object, guint prop_id, GValue * value,
GParamSpec * pspec)
{
GstCCExtractor *filter = GST_CCEXTRACTOR (object);
switch (prop_id) {
case PROP_REMOVE_CAPTION_META:
g_value_set_boolean (value, filter->remove_caption_meta);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}

2
ext/closedcaption/gstccextractor.h
View file

@ -50,6 +50,8 @@ struct _GstCCExtractor
GstVideoInfo video_info;
GstFlowCombiner *combiner;
gboolean remove_caption_meta;
};
struct _GstCCExtractorClass