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videoparseutils: Only add a single closed caption meta

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Otherwise, having a stream go through a parser multiple times would
result in duplicate closed caption meta.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gst-plugins-bad/-/merge_requests/1396>
This commit is contained in:
Vivia Nikolaidou 2020-07-01 20:27:14 +03:00 committed by GStreamer Merge Bot
parent c94675f1d4
commit 31d5d04bb1
1 changed files with 8 additions and 3 deletions
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11
gst/videoparsers/gstvideoparseutils.c
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@ -252,9 +252,14 @@ gst_video_push_user_data (GstElement * elt, GstVideoParseUserData * user_data,
/* 1. handle closed captions */
if (user_data->closedcaptions_size > 0) {
gst_buffer_add_video_caption_meta (buf,
user_data->closedcaptions_type, user_data->closedcaptions,
user_data->closedcaptions_size);
if (!gst_buffer_get_meta (buf, GST_VIDEO_CAPTION_META_API_TYPE)) {
gst_buffer_add_video_caption_meta (buf,
user_data->closedcaptions_type, user_data->closedcaptions,
user_data->closedcaptions_size);
} else {
GST_DEBUG_OBJECT (elt, "Closed caption data already found on buffer, "
"discarding to avoid duplication");
}
user_data->closedcaptions_type = GST_VIDEO_CAPTION_TYPE_UNKNOWN;
user_data->closedcaptions_size = 0;