avcodec/avuienc: Allow user-supplied buffers

Trivial given that this encoder knows the size of the output buffer
in advance.

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

libavcodec/avuienc.c

@@ -21,6 +21,7 @@
  */
 
 #include "avcodec.h"
+#include "encode.h"
 #include "internal.h"
 #include "libavutil/intreadwrite.h"
 
@@ -62,7 +63,7 @@ static int avui_encode_frame(AVCodecContext *avctx, AVPacket *pkt,
         skip = 16;
     }
     size = 2 * avctx->width * (avctx->height + skip) + 8 * interlaced;
-    if ((ret = ff_alloc_packet2(avctx, pkt, size, size)) < 0)
+    if ((ret = ff_get_encode_buffer(avctx, pkt, size, 0)) < 0)
         return ret;
     dst = pkt->data;
     if (!interlaced) {
@@ -98,7 +99,7 @@ const AVCodec ff_avui_encoder = {
     .id           = AV_CODEC_ID_AVUI,
     .init         = avui_encode_init,
     .encode2      = avui_encode_frame,
-    .capabilities = AV_CODEC_CAP_EXPERIMENTAL,
+    .capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_EXPERIMENTAL,
     .pix_fmts     = (const enum AVPixelFormat[]){ AV_PIX_FMT_UYVY422, AV_PIX_FMT_NONE },
     .caps_internal = FF_CODEC_CAP_INIT_THREADSAFE,
 };