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| author | Andriy Gelman <andriy.gelman@gmail.com> | 2019-12-05 22:15:41 -0500 |
|---|---|---|
| committer | James Almer <jamrial@gmail.com> | 2020-01-17 17:43:52 -0300 |
| commit | ad326379c6634505c9ebc46964057441761008bc (patch) | |
| tree | 75af00b336830dbbfc9a1038511f00306d8df23b /libavcodec/hevc_parse.c | |
| parent | 5b7e90b252f765d677de6882bc65a362205638fa (diff) | |
lavc/h2645_parse: Don't automatically remove nuh_layer_id > 0 packets
HEVC standard supports multi-layer streams (ITU-T H.265 02/2018 Annex
F). Each NAL unit belongs to a particular layer defined by nuh_layer_id
in the header.
Currently, all NAL units that do not belong to a base layer are
automatically removed in ff_h2645_packet_split(). Some data may
therefore be lost when future filters/decoders are designed to support
multi-layer streams.
A better approach is to forward nuh_layer_id > 0 packets and let blocks
down the chain decide how to process them. The condition to remove
packets has been moved to hevcdec and cbs.
Found-by: Andreas Rheinhardt <andreas.rheinhardt@gmail.com>
Signed-off-by: Andriy Gelman <andriy.gelman@gmail.com>
Signed-off-by: James Almer <jamrial@gmail.com>
Diffstat (limited to 'libavcodec/hevc_parse.c')
| -rw-r--r-- | libavcodec/hevc_parse.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/libavcodec/hevc_parse.c b/libavcodec/hevc_parse.c index dddb293df6..29dfd479f3 100644 --- a/libavcodec/hevc_parse.c +++ b/libavcodec/hevc_parse.c @@ -37,6 +37,8 @@ static int hevc_decode_nal_units(const uint8_t *buf, int buf_size, HEVCParamSets for (i = 0; i < pkt.nb_nals; i++) { H2645NAL *nal = &pkt.nals[i]; + if (nal->nuh_layer_id > 0) + continue; /* ignore everything except parameter sets and VCL NALUs */ switch (nal->type) { |