From 2c78a76cb0443f8a12a5eadc3b58373aa2f4ab22 Mon Sep 17 00:00:00 2001 From: Michael Niedermayer Date: Thu, 17 Oct 2019 11:54:12 +0200 Subject: [PATCH] avcodec/g729dec: Avoid computing invalid temporary pointers for ff_acelp_weighted_vector_sum() Fixes: Ticket8176 Reviewed-by: Paul B Mahol Signed-off-by: Michael Niedermayer --- libavcodec/g729dec.c | 13 +++++++------ 1 file changed, 7 insertions(+), 6 deletions(-) diff --git a/libavcodec/g729dec.c b/libavcodec/g729dec.c index 25951716ef..67054b71df 100644 --- a/libavcodec/g729dec.c +++ b/libavcodec/g729dec.c @@ -557,12 +557,13 @@ 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];