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| author | Justin Ruggles <justin.ruggles@gmail.com> | 2011-12-21 16:09:11 -0500 |
|---|---|---|
| committer | Justin Ruggles <justin.ruggles@gmail.com> | 2011-12-22 08:31:07 -0500 |
| commit | 9a3f10695a011861dcf5a649e3e72580b1a4eed4 (patch) | |
| tree | 645af965af1b07ddb70a6d7a4715995b68eb578c | |
| parent | 131609dc2a75e6783396853023d6f49333e3f495 (diff) | |
| download | ffmpeg-9a3f10695a011861dcf5a649e3e72580b1a4eed4.tar.gz | |
ra144enc: zero the reflection coeffs if the filter is unstable
fixes use of uninitialized values if the filter is still unstable after using
the previous frame lpc coefficients.
| -rw-r--r-- | libavcodec/ra144enc.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/libavcodec/ra144enc.c b/libavcodec/ra144enc.c index 1d260b7a22..ee38bd5c54 100644 --- a/libavcodec/ra144enc.c +++ b/libavcodec/ra144enc.c @@ -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++) { |