av(format|device): Add const to muxer packet data pointers

The packets given to muxers need not be writable,
so it is best to access them via const uint8_t*.

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/libavdevice/sndio_enc.c b/libavdevice/sndio_enc.c
index a595438d8a..0cf58fdc6a 100644
--- a/libavdevice/sndio_enc.c
+++ b/libavdevice/sndio_enc.c
@@ -46,7 +46,7 @@ static av_cold int audio_write_header(AVFormatContext *s1)
 static int audio_write_packet(AVFormatContext *s1, AVPacket *pkt)
 {
     SndioData *s = s1->priv_data;
-    uint8_t *buf= pkt->data;
+    const uint8_t *buf = pkt->data;
     int size = pkt->size;
     int len, ret;