[FFmpeg-cvslog] avfilter/afir_template: skip useless moving of samples

[Paul B Mahol]

ffmpeg | branch: master | Paul B Mahol <onemda at gmail.com> | Wed Dec 21 18:05:20 2022 +0100| [54ebe1e8dcc07ac2e02d84fb8155fabf200dd8e6] | committer: Paul B Mahol

avfilter/afir_template: skip useless moving of samples

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=54ebe1e8dcc07ac2e02d84fb8155fabf200dd8e6
---

 libavfilter/afir_template.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/libavfilter/afir_template.c b/libavfilter/afir_template.c
index 8766119d39..ca994f4352 100644
--- a/libavfilter/afir_template.c
+++ b/libavfilter/afir_template.c
@@ -403,7 +403,8 @@ static int fn(fir_quantum)(AVFilterContext *ctx, AVFrame *out, int ch, int offse
 
         seg->part_index[ch] = (seg->part_index[ch] + 1) % nb_partitions;
 
-        memmove(src, src + min_part_size, (seg->input_size - min_part_size) * sizeof(*src));
+        if (part_size != min_part_size)
+            memmove(src, src + min_part_size, (seg->input_size - min_part_size) * sizeof(*src));
 
         fn(fir_fadd)(s, ptr, dst, nb_samples);
     }