From 6d627eae3cd5ff80382b76a67a596caf48869715 Mon Sep 17 00:00:00 2001
From: Nicolas George <nicolas.george@normalesup.org>
Date: Sat, 23 Jun 2012 11:50:19 +0200
Subject: [PATCH] showwaves: fix first sample of frame test.

Avoids a huge memleak when n != 1.
---
 libavfilter/avf_showwaves.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/libavfilter/avf_showwaves.c b/libavfilter/avf_showwaves.c
index 645065f33d..90d3ec9441 100644
--- a/libavfilter/avf_showwaves.c
+++ b/libavfilter/avf_showwaves.c
@@ -196,7 +196,7 @@ static void filter_samples(AVFilterLink *inlink, AVFilterBufferRef *insamples)
 
     /* draw data in the buffer */
     for (i = 0; i < nb_samples; i++) {
-        if (showwaves->buf_idx == 0) {
+        if (showwaves->buf_idx == 0 && showwaves->sample_count_mod == 0) {
             showwaves->outpicref = outpicref =
                 ff_get_video_buffer(outlink, AV_PERM_WRITE|AV_PERM_ALIGN,
                                     outlink->w, outlink->h);