Merge commit '8629149816930a43bf5a66b11c6224446cabd044'

[ffmpeg] / libavcodec / opus_silk.c

diff --git a/libavcodec/opus_silk.c b/libavcodec/opus_silk.c
index 344333cc180f05d7833b9ee48fe90091bad1b39c..2fcbf3b9d3ce6533aa73d98d252309fdb12f0a77 100644 (file)
--- a/libavcodec/opus_silk.c
+++ b/libavcodec/opus_silk.c
@@ -239,8 +239,10 @@ static void silk_lsf2lpc(const int16_t nlsf[16], float lpcf[16], int order)
 
     /* reconstruct A(z) */
     for (k = 0; k < order>>1; k++) {
-        lpc32[k]         = -p[k + 1] - p[k] - q[k + 1] + q[k];
-        lpc32[order-k-1] = -p[k + 1] - p[k] + q[k + 1] - q[k];
+        int32_t p_tmp = p[k + 1] + p[k];
+        int32_t q_tmp = q[k + 1] - q[k];
+        lpc32[k]         = -q_tmp - p_tmp;
+        lpc32[order-k-1] =  q_tmp - p_tmp;
     }
 
     /* limit the range of the LPC coefficients to each fit within an int16_t */