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aac: Relax reserved_bit validation 

Although the specification mandates this bit to zero, it may happen
that software tools incorrectly flip it to one, invalidating a possibly
valid stream.

Relax this restriction, by failing only when AV_EF_BITSTREAM is set.
This behaviour is similar to aac decoders in Firefox and Quicktime.

Signed-off-by: Vittorio Giovara <vittorio.giovara@gmail.com>
This commit is contained in:
Vittorio Giovara 2015-03-03 19:38:32 +00:00
parent 25f613f8be
commit 87e85a133f
1 changed files with 2 additions and 1 deletions
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3
libavcodec/aacdec.c
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@ -1143,7 +1143,8 @@ static int decode_ics_info(AACContext *ac, IndividualChannelStream *ics,
if (aot != AOT_ER_AAC_ELD) {
if (get_bits1(gb)) {
av_log(ac->avctx, AV_LOG_ERROR, "Reserved bit set.\n");
return AVERROR_INVALIDDATA;
if (ac->avctx->err_recognition & AV_EF_BITSTREAM)
return AVERROR_INVALIDDATA;
}
ics->window_sequence[1] = ics->window_sequence[0];
ics->window_sequence[0] = get_bits(gb, 2);