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h264parse: Drop filler data

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When skipping data, check if they are filler bytes. If so, drop the
data instead of skipping. We don't want to output filler bytes, but they
shouldn't cause a discontinuity.

https://bugzilla.gnome.org/show_bug.cgi?id=768125
This commit is contained in:
Edward Hervey 2016-06-29 18:36:56 +02:00 committed by Edward Hervey
parent 11a7362993
commit c19d1b46c3
1 changed files with 21 additions and 0 deletions
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21
gst/videoparsers/gsth264parse.c
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@ -1053,6 +1053,7 @@ gst_h264_parse_handle_frame (GstBaseParse * parse,
GstH264NalUnit nalu;
GstH264ParserResult pres;
gint framesize;
GstFlowReturn ret;
if (G_UNLIKELY (GST_BUFFER_FLAG_IS_SET (frame->buffer,
GST_BUFFER_FLAG_DISCONT))) {
@ -1105,6 +1106,22 @@ gst_h264_parse_handle_frame (GstBaseParse * parse,
switch (pres) {
case GST_H264_PARSER_OK:
if (nalu.sc_offset > 0) {
int i;
gboolean is_filler_data = TRUE;
/* Handle filler data */
for (i = 0; i < nalu.sc_offset; i++) {
if (data[i] != 0x00) {
is_filler_data = FALSE;
break;
}
}
if (is_filler_data) {
GST_DEBUG_OBJECT (parse, "Dropping filler data %d", nalu.sc_offset);
frame->flags |= GST_BASE_PARSE_FRAME_FLAG_DROP;
gst_buffer_unmap (buffer, &map);
ret = gst_base_parse_finish_frame (parse, frame, nalu.sc_offset);
goto drop;
}
*skipsize = nalu.sc_offset;
goto skip;
}
@ -1240,6 +1257,10 @@ out:
gst_buffer_unmap (buffer, &map);
return GST_FLOW_OK;
drop:
GST_DEBUG_OBJECT (h264parse, "Dropped data");
return ret;
skip:
GST_DEBUG_OBJECT (h264parse, "skipping %d", *skipsize);
/* If we are collecting access units, we need to preserve the initial