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avcodec/utils: Fix signed integer overflow in rc_initial_buffer_occupancy initialization

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Signed integer overflow is undefined behavior.
Detected with clang and -fsanitize=signed-integer-overflow

Signed-off-by: Vitaly Buka <vitalybuka@google.com>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
(cherry picked from commit 8c2bb10ddfef1f151b9455d152c9aca91140a4b0)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Vitaly Buka 2017-08-20 11:56:47 -07:00 committed by Michael Niedermayer
parent 6da5e63ba7
commit febea34f91
1 changed files with 1 additions and 1 deletions
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libavcodec/utils.c
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@ -1570,7 +1570,7 @@ FF_ENABLE_DEPRECATION_WARNINGS
} }
if (!avctx->rc_initial_buffer_occupancy) if (!avctx->rc_initial_buffer_occupancy)
avctx->rc_initial_buffer_occupancy = avctx->rc_buffer_size * 3 / 4; avctx->rc_initial_buffer_occupancy = avctx->rc_buffer_size * 3LL / 4;
if (avctx->ticks_per_frame && avctx->time_base.num && if (avctx->ticks_per_frame && avctx->time_base.num &&
avctx->ticks_per_frame > INT_MAX / avctx->time_base.num) { avctx->ticks_per_frame > INT_MAX / avctx->time_base.num) {