sunrastenc: use the AVFrame API properly.

libavcodec/sunrastenc.c

@@ -25,7 +25,6 @@
 #include "sunrast.h"
 
 typedef struct SUNRASTContext {
-    AVFrame picture;
     PutByteContext p;
     int depth;      ///< depth of pixel
     int length;     ///< length (bytes) of image
@@ -154,7 +153,10 @@ static av_cold int sunrast_encode_init(AVCodecContext *avctx)
         return AVERROR(EINVAL);
     }
 
-    avctx->coded_frame            = &s->picture;
+    avctx->coded_frame = av_frame_alloc();
+    if (!avctx->coded_frame)
+        return AVERROR(ENOMEM);
+
     avctx->coded_frame->key_frame = 1;
     avctx->coded_frame->pict_type = AV_PICTURE_TYPE_I;
     s->maptype                    = RMT_NONE;
@@ -207,6 +209,12 @@ static int sunrast_encode_frame(AVCodecContext *avctx,  AVPacket *avpkt,
     return 0;
 }
 
+static av_cold int sunrast_encode_close(AVCodecContext *avctx)
+{
+    av_frame_free(&avctx->coded_frame);
+    return 0;
+}
+
 static const AVCodecDefault sunrast_defaults[] = {
      { "coder", "rle" },
      { NULL },
@@ -219,6 +227,7 @@ AVCodec ff_sunrast_encoder = {
     .id             = AV_CODEC_ID_SUNRAST,
     .priv_data_size = sizeof(SUNRASTContext),
     .init           = sunrast_encode_init,
+    .close          = sunrast_encode_close,
     .encode2        = sunrast_encode_frame,
     .defaults       = sunrast_defaults,
     .pix_fmts       = (const enum AVPixelFormat[]){ AV_PIX_FMT_BGR24,