Module: libav
Branch: release/11
Commit: 34f4d09a77fe2f8f677bf32b6fecfeb4a4fe9182
Author: Alex Converse <alex.conve...@gmail.com>
Committer: Sean McGovern <gsean...@gmail.com>
Date: Mon Mar 20 12:44:42 2017 -0700
aacsbr: Turnoff in the event of over read.
Aliased compressed AAC bytes are almost certainly not meaningful SBR
data. In the wild this causes harsh artifacts switching HE-AAC streams
that don't have SBR headers aligned with segment boundaries.
Turning off SBR falls back to a default set of upsampling parameters
that can function as a sort of error concealment. This is consistent
with how the decoder handles other sorts of errors.
Bug-Id: 1047
CC: libav-sta...@libav.org
Signed-off-by: Sean McGovern <gsean...@gmail.com>
---
libavcodec/aacsbr.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/libavcodec/aacsbr.c b/libavcodec/aacsbr.c
index 7d156e5..20c7e93 100644
--- a/libavcodec/aacsbr.c
+++ b/libavcodec/aacsbr.c
@@ -1104,6 +1104,7 @@ int ff_decode_sbr_extension(AACContext *ac,
SpectralBandReplication *sbr,
if (bytes_read > cnt) {
av_log(ac->avctx, AV_LOG_ERROR,
"Expected to read %d SBR bytes actually read %d.\n", cnt,
bytes_read);
+ sbr_turnoff(sbr);
}
return cnt;
}
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