avcodec/decoders: Use const uint8_t* to access input packet data

These packets need not be writable, so we must not modify them.

Reviewed-by: Paul B Mahol <onemda@gmail.com>
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/libavcodec/ansi.c b/libavcodec/ansi.c
index 909ebe7396..ff4437cc61 100644
--- a/libavcodec/ansi.c
+++ b/libavcodec/ansi.c
@@ -358,7 +358,7 @@ static int decode_frame(AVCodecContext *avctx, AVFrame *rframe,
                         int *got_frame, AVPacket *avpkt)
 {
     AnsiContext *s = avctx->priv_data;
-    uint8_t *buf = avpkt->data;
+    const uint8_t *buf = avpkt->data;
     int buf_size = avpkt->size;
     const uint8_t *buf_end   = buf+buf_size;
     int ret, i, count;