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codecs: h264picture: Count only complete complementary field pair for dpb fullness decision

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Our DPB implementation was designed as such that allowing
temporary DPB overflow in the middle of field picture decoding
and incomplete field pair should not trigger DPB bumping.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gst-plugins-bad/-/merge_requests/1947>
This commit is contained in:
Seungha Yang 2021-01-10 23:16:55 +09:00
parent e14bbd7f5c
commit ae7c20a6ed
1 changed files with 3 additions and 2 deletions
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5
gst-libs/gst/codecs/gsth264picture.c
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@ -596,7 +596,7 @@ gst_h264_dpb_has_empty_frame_buffer (GstH264Dpb * dpb)
} else {
gint i;
gint count = 0;
/* Count pictures without second fields */
/* Count the number of complementary field pairs */
for (i = 0; i < dpb->pic_list->len; i++) {
GstH264Picture *picture =
g_array_index (dpb->pic_list, GstH264Picture *, i);
@ -604,7 +604,8 @@ gst_h264_dpb_has_empty_frame_buffer (GstH264Dpb * dpb)
if (picture->second_field)
continue;
count++;
if (GST_H264_PICTURE_IS_FRAME (picture) || picture->other_field)
count++;
}
if (count <= dpb->max_num_frames)