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aacenc: update max_sfb when num_swb changes

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This fixes out-of-bounds reads in avoid_clipping.

Reviewed-by: Rostislav Pehlivanov <atomnuker@gmail.com>
Signed-off-by: Andreas Cadhalpun <Andreas.Cadhalpun@googlemail.com>
This commit is contained in:
Andreas Cadhalpun 2015-12-06 21:35:08 +01:00
parent 3d09065316
commit 5b0da6999f
1 changed files with 1 additions and 0 deletions
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libavcodec/aacenc.c
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@ -574,6 +574,7 @@ static int aac_encode_frame(AVCodecContext *avctx, AVPacket *avpkt,
ics->num_windows = wi[ch].num_windows;
ics->swb_sizes = s->psy.bands [ics->num_windows == 8];
ics->num_swb = tag == TYPE_LFE ? ics->num_swb : s->psy.num_bands[ics->num_windows == 8];
ics->max_sfb = FFMIN(ics->max_sfb, ics->num_swb);
ics->swb_offset = wi[ch].window_type[0] == EIGHT_SHORT_SEQUENCE ?
ff_swb_offset_128 [s->samplerate_index]:
ff_swb_offset_1024[s->samplerate_index];