[FFmpeg-cvslog] lavfi/avf_showspectrum: Fix the memory leak in error handle path

[Jun Zhao]

ffmpeg | branch: master | Jun Zhao <barryjzhao at tencent.com> | Tue Dec  3 18:16:24 2019 +0800| [46d2a67f80e60128791d3d254fc6c17db6b94db9] | committer: Jun Zhao

lavfi/avf_showspectrum: Fix the memory leak in error handle path

Fix the memory leak in error handle path.

Reviewed-by: Michael Niedermayer <michael at niedermayer.cc>
Signed-off-by: Jun Zhao <barryjzhao at tencent.com>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=46d2a67f80e60128791d3d254fc6c17db6b94db9
---

 libavfilter/avf_showspectrum.c | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/libavfilter/avf_showspectrum.c b/libavfilter/avf_showspectrum.c
index d5785af252..3a3ef7eb31 100644
--- a/libavfilter/avf_showspectrum.c
+++ b/libavfilter/avf_showspectrum.c
@@ -700,16 +700,15 @@ static int draw_legend(AVFilterContext *ctx, int samples)
 
     drawtext(s->outpicref, 2, outlink->h - 10, "CREATED BY LIBAVFILTER", 0);
     drawtext(s->outpicref, outlink->w - 2 - strlen(text) * 10, outlink->h - 10, text, 0);
+    av_freep(&text);
     if (s->stop) {
-        char *text = av_asprintf("Zoom: %d Hz - %d Hz", s->start, s->stop);
+        text = av_asprintf("Zoom: %d Hz - %d Hz", s->start, s->stop);
         if (!text)
             return AVERROR(ENOMEM);
         drawtext(s->outpicref, outlink->w - 2 - strlen(text) * 10, 3, text, 0);
         av_freep(&text);
     }
 
-    av_freep(&text);
-
     dst = s->outpicref->data[0] + (s->start_y - 1) * s->outpicref->linesize[0] + s->start_x - 1;
     for (x = 0; x < s->w + 1; x++)
         dst[x] = 200;