avcodec/decode: add a flags parameter to ff_reget_buffer()

Some decoders may not need a writable buffer in some specific cases, but only
a reference to the existing buffer with updated frame properties instead, for
the purpose of returning duplicate frames. For this, the
FF_REGET_BUFFER_FLAG_READONLY flag is added, which will prevent potential
allocations and buffer copies when they are not needed.

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

1 files changed, 1 insertions, 1 deletions

diff --git a/libavcodec/rscc.c b/libavcodec/rscc.c
index f494c30ed8..bd0520950f 100644
--- a/libavcodec/rscc.c
+++ b/libavcodec/rscc.c
@@ -310,7 +310,7 @@ static int rscc_decode_frame(AVCodecContext *avctx, void *data,
     }
 
     /* Allocate when needed */
-    ret = ff_reget_buffer(avctx, ctx->reference);
+    ret = ff_reget_buffer(avctx, ctx->reference, 0);
     if (ret < 0)
         goto end;