[FFmpeg-cvslog] avcodec/g729dec: Avoid computing invalid temporary pointers for ff_acelp_weighted_vector_sum()
Michael Niedermayer
git at videolan.org
Sat Apr 23 18:44:47 EEST 2022
ffmpeg | branch: release/2.8 | Michael Niedermayer <michael at niedermayer.cc> | Thu Oct 17 11:54:12 2019 +0200| [db26d829edf83b8cb730d50831770c508fc6436f] | committer: Michael Niedermayer
avcodec/g729dec: Avoid computing invalid temporary pointers for ff_acelp_weighted_vector_sum()
Fixes: Ticket8176
Reviewed-by: Paul B Mahol <onemda at gmail.com>
Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>
(cherry picked from commit 2c78a76cb0443f8a12a5eadc3b58373aa2f4ab22)
Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>
> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=db26d829edf83b8cb730d50831770c508fc6436f
---
libavcodec/g729dec.c | 13 +++++++------
1 file changed, 7 insertions(+), 6 deletions(-)
diff --git a/libavcodec/g729dec.c b/libavcodec/g729dec.c
index 42e1b4402c..1b70a0cc60 100644
--- a/libavcodec/g729dec.c
+++ b/libavcodec/g729dec.c
@@ -544,12 +544,13 @@ static int decode_frame(AVCodecContext *avctx, void *data, int *got_frame_ptr,
fc_v[i] = <
\ fc_v[i] + gain_pitch * fc_v[i-pitch_delay], i >= pitch_delay
*/
- ff_acelp_weighted_vector_sum(fc + pitch_delay_int[i],
- fc + pitch_delay_int[i],
- fc, 1 << 14,
- av_clip(ctx->past_gain_pitch[0], SHARP_MIN, SHARP_MAX),
- 0, 14,
- SUBFRAME_SIZE - pitch_delay_int[i]);
+ if (SUBFRAME_SIZE > pitch_delay_int[i])
+ ff_acelp_weighted_vector_sum(fc + pitch_delay_int[i],
+ fc + pitch_delay_int[i],
+ fc, 1 << 14,
+ av_clip(ctx->past_gain_pitch[0], SHARP_MIN, SHARP_MAX),
+ 0, 14,
+ SUBFRAME_SIZE - pitch_delay_int[i]);
memmove(ctx->past_gain_pitch+1, ctx->past_gain_pitch, 5 * sizeof(int16_t));
ctx->past_gain_code[1] = ctx->past_gain_code[0];
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