X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=libavcodec%2Flpc.c;h=cc3ce447256cda935e3fb20191be365895112b2a;hb=73275259978e77f3dc52bfd01712249d96a585fe;hp=d1833cbed7aa3abf90a8972ec62c3d3aebc84c8d;hpb=c18365402bbb6fbfa7854b47c3288f9e31f39f44;p=ffmpeg

diff --git a/libavcodec/lpc.c b/libavcodec/lpc.c
index d1833cbed7a..cc3ce447256 100644
--- a/libavcodec/lpc.c
+++ b/libavcodec/lpc.c
@@ -1,4 +1,4 @@
-/**
+/*
  * LPC utility code
  * Copyright (c) 2006  Justin Ruggles <justin.ruggles@gmail.com>
  *
@@ -19,6 +19,7 @@
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  */
 
+#include "libavutil/common.h"
 #include "libavutil/lls.h"
 
 #define LPC_USE_DOUBLE
@@ -177,11 +178,9 @@ int ff_lpc_calc_coefs(LPCContext *s,
     }
 
     if (lpc_type == FF_LPC_TYPE_LEVINSON) {
-        double *windowed_samples = s->windowed_samples + max_order;
-
-        s->lpc_apply_welch_window(samples, blocksize, windowed_samples);
+        s->lpc_apply_welch_window(samples, blocksize, s->windowed_samples);
 
-        s->lpc_compute_autocorr(windowed_samples, blocksize, max_order, autoc);
+        s->lpc_compute_autocorr(s->windowed_samples, blocksize, max_order, autoc);
 
         compute_lpc_coefs(autoc, max_order, &lpc[0][0], MAX_LPC_ORDER, 0, 1);
 
@@ -247,10 +246,11 @@ av_cold int ff_lpc_init(LPCContext *s, int blocksize, int max_order,
     s->lpc_type  = lpc_type;
 
     if (lpc_type == FF_LPC_TYPE_LEVINSON) {
-        s->windowed_samples = av_mallocz((blocksize + max_order + 2) *
-                                         sizeof(*s->windowed_samples));
-        if (!s->windowed_samples)
+        s->windowed_buffer = av_mallocz((blocksize + 2 + FFALIGN(max_order, 4)) *
+                                        sizeof(*s->windowed_samples));
+        if (!s->windowed_buffer)
             return AVERROR(ENOMEM);
+        s->windowed_samples = s->windowed_buffer + FFALIGN(max_order, 4);
     } else {
         s->windowed_samples = NULL;
     }
@@ -266,5 +266,5 @@ av_cold int ff_lpc_init(LPCContext *s, int blocksize, int max_order,
 
 av_cold void ff_lpc_end(LPCContext *s)
 {
-    av_freep(&s->windowed_samples);
+    av_freep(&s->windowed_buffer);
 }