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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 /libavcodec | |
| 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.
Diffstat (limited to 'libavcodec')
| -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++) { |