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ra144enc: zero the reflection coeffs if the filter is unstable

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fixes use of uninitialized values if the filter is still unstable after using
the previous frame lpc coefficients.
This commit is contained in:
Justin Ruggles 2011-12-21 16:09:11 -05:00
parent 131609dc2a
commit 9a3f10695a
1 changed files with 4 additions and 1 deletions
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5
libavcodec/ra144enc.c
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@ -477,7 +477,10 @@ static int ra144_encode_frame(AVCodecContext *avctx, uint8_t *frame,
* The filter is unstable: use the coefficients of the previous frame.
*/
ff_int_to_int16(block_coefs[NBLOCKS - 1], ractx->lpc_coef[1]);
ff_eval_refl(lpc_refl, block_coefs[NBLOCKS - 1], avctx);
if (ff_eval_refl(lpc_refl, block_coefs[NBLOCKS - 1], avctx)) {
/* the filter is still unstable. set reflection coeffs to zero. */
memset(lpc_refl, 0, sizeof(lpc_refl));
}
}
init_put_bits(&pb, frame, buf_size);
for (i = 0; i < LPC_ORDER; i++) {