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videoscale: Support for alternate-field interlacing

Browse source 
Accept the negotiation, video-converter.c is aware of the half-height
already

Part-of: <https://gitlab.freedesktop.org/gstreamer/gst-plugins-base/-/merge_requests/1027>
This commit is contained in:
Vivia Nikolaidou 2021-02-04 18:22:15 +02:00
parent ca4240bd03
commit b7b3ec6a6e
1 changed files with 16 additions and 6 deletions
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22
gst/videoscale/gstvideoscale.c
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@ -211,6 +211,9 @@ static void gst_video_scale_get_property (GObject * object, guint prop_id,
#define gst_video_scale_parent_class parent_class
G_DEFINE_TYPE (GstVideoScale, gst_video_scale, GST_TYPE_VIDEO_FILTER);
static GstCapsFeatures *features_format_interlaced,
*features_format_interlaced_sysmem;
static void
gst_video_scale_class_init (GstVideoScaleClass * klass)
{
@ -470,8 +473,11 @@ gst_video_scale_transform_caps (GstBaseTransform * trans,
/* If the features are non-sysmem we can only do passthrough */
if (!gst_caps_features_is_any (features)
&& gst_caps_features_is_equal (features,
GST_CAPS_FEATURES_MEMORY_SYSTEM_MEMORY)) {
&& (gst_caps_features_is_equal (features,
GST_CAPS_FEATURES_MEMORY_SYSTEM_MEMORY)
|| gst_caps_features_is_equal (features, features_format_interlaced)
|| gst_caps_features_is_equal (features,
features_format_interlaced_sysmem))) {
gst_structure_set (structure, "width", GST_TYPE_INT_RANGE, 1, G_MAXINT,
"height", GST_TYPE_INT_RANGE, 1, G_MAXINT, NULL);
@ -1221,15 +1227,19 @@ gst_video_scale_src_event (GstBaseTransform * trans, GstEvent * event)
static gboolean
plugin_init (GstPlugin * plugin)
{
if (!gst_element_register (plugin, "videoscale", GST_RANK_NONE,
GST_TYPE_VIDEO_SCALE))
return FALSE;
features_format_interlaced =
gst_caps_features_new (GST_CAPS_FEATURE_FORMAT_INTERLACED, NULL);
features_format_interlaced_sysmem =
gst_caps_features_copy (features_format_interlaced);
gst_caps_features_add (features_format_interlaced_sysmem,
GST_CAPS_FEATURE_MEMORY_SYSTEM_MEMORY);
GST_DEBUG_CATEGORY_INIT (video_scale_debug, "videoscale", 0,
"videoscale element");
GST_DEBUG_CATEGORY_GET (CAT_PERFORMANCE, "GST_PERFORMANCE");
return TRUE;
return gst_element_register (plugin, "videoscale", GST_RANK_NONE,
GST_TYPE_VIDEO_SCALE);
}
GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,