[FFmpeg-cvslog] avutil/samplefmt: don't add offsets to NULL pointers

[James Almer]

ffmpeg | branch: master | James Almer <jamrial at gmail.com> | Mon Jun  7 00:04:21 2021 -0300| [8a6103326e165b30510378cbd0e7953910f2b55c] | committer: James Almer

avutil/samplefmt: don't add offsets to NULL pointers

Signed-off-by: James Almer <jamrial at gmail.com>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=8a6103326e165b30510378cbd0e7953910f2b55c
---

 libavutil/samplefmt.c | 13 ++++++++++---
 1 file changed, 10 insertions(+), 3 deletions(-)

diff --git a/libavutil/samplefmt.c b/libavutil/samplefmt.c
index fc077f6444..c7428940e1 100644
--- a/libavutil/samplefmt.c
+++ b/libavutil/samplefmt.c
@@ -160,13 +160,20 @@ int av_samples_fill_arrays(uint8_t **audio_data, int *linesize,
     if (buf_size < 0)
         return buf_size;
 
+    if (linesize)
+        *linesize = line_size;
+
+    memset(audio_data, 0, planar
+                          ? sizeof(*audio_data) * nb_channels
+                          : sizeof(*audio_data));
+
+    if (!buf)
+        return buf_size;
+
     audio_data[0] = (uint8_t *)buf;
     for (ch = 1; planar && ch < nb_channels; ch++)
         audio_data[ch] = audio_data[ch-1] + line_size;
 
-    if (linesize)
-        *linesize = line_size;
-
     return buf_size;
 }