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avviddec: do not add 708 caption meta if already exists

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(this is only used for CEA 708 raw data). another element
such as mpegvideoparse may have already added the meta.
This commit is contained in:
Aaron Boxer 2019-03-28 14:24:42 -04:00
parent be579c426d
commit b2cc8a57d4
1 changed files with 28 additions and 5 deletions
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33
ext/libav/gstavviddec.c
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@ -1598,12 +1598,35 @@ gst_ffmpegviddec_video_frame (GstFFMpegVidDec * ffmpegdec,
AVFrameSideData *side_data =
av_frame_get_side_data (ffmpegdec->picture, AV_FRAME_DATA_A53_CC);
if (side_data) {
GST_LOG_OBJECT (ffmpegdec, "Found CC of size %d", side_data->size);
GstVideoCaptionMeta *cc_meta = NULL;
gpointer iter = NULL;
gboolean found_708_raw_meta = FALSE;
GST_LOG_OBJECT (ffmpegdec,
"Found CC side data of type AV_FRAME_DATA_A53_CC, size %d",
side_data->size);
GST_MEMDUMP ("A53 CC", side_data->data, side_data->size);
out_frame->output_buffer =
gst_buffer_make_writable (out_frame->output_buffer);
gst_buffer_add_video_caption_meta (out_frame->output_buffer,
GST_VIDEO_CAPTION_TYPE_CEA708_RAW, side_data->data, side_data->size);
while ((cc_meta = (GstVideoCaptionMeta *)
gst_buffer_iterate_meta_filtered (out_frame->input_buffer, &iter,
GST_VIDEO_CAPTION_META_API_TYPE))) {
if (cc_meta->caption_type != GST_VIDEO_CAPTION_TYPE_CEA708_RAW)
continue;
found_708_raw_meta = TRUE;
break;
}
/* do not add CEA 708 caption meta if it already exists */
if (!found_708_raw_meta) {
out_frame->output_buffer =
gst_buffer_make_writable (out_frame->output_buffer);
gst_buffer_add_video_caption_meta (out_frame->output_buffer,
GST_VIDEO_CAPTION_TYPE_CEA708_RAW, side_data->data,
side_data->size);
} else {
GST_LOG_OBJECT (ffmpegdec,
"CEA 708 caption meta already exists: will not add new caption meta");
}
}
}