avcodec/mvcdec: simplify, no need to use reget buffer

Signed-off-by: Paul B Mahol <onemda@gmail.com>

libavcodec/mvcdec.c

@@ -31,7 +31,6 @@
 #include "internal.h"
 
 typedef struct MvcContext {
-    AVFrame *frame;
     int vflip;
 } MvcContext;
 
@@ -53,10 +52,6 @@ static av_cold int mvc_decode_init(AVCodecContext *avctx)
 
     avctx->pix_fmt = (avctx->codec_id == AV_CODEC_ID_MVC1) ? AV_PIX_FMT_RGB555
                                                            : AV_PIX_FMT_RGB32;
-    s->frame       = av_frame_alloc();
-    if (!s->frame)
-        return AVERROR(ENOMEM);
-
     s->vflip = avctx->extradata_size >= 9 &&
                !memcmp(avctx->extradata + avctx->extradata_size - 9, "BottomUp", 9);
     return 0;
@@ -231,39 +226,32 @@ static int mvc_decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
                             AVPacket *avpkt)
 {
     MvcContext *s = avctx->priv_data;
+    AVFrame *frame = data;
     GetByteContext gb;
     int ret;
 
-    if ((ret = ff_reget_buffer(avctx, s->frame)) < 0)
+    if ((ret = ff_get_buffer(avctx, frame, 0)) < 0)
         return ret;
 
     bytestream2_init(&gb, avpkt->data, avpkt->size);
     if (avctx->codec_id == AV_CODEC_ID_MVC1)
-        ret = decode_mvc1(avctx, &gb, s->frame->data[0],
-                          avctx->width, avctx->height, s->frame->linesize[0]);
+        ret = decode_mvc1(avctx, &gb, frame->data[0],
+                          avctx->width, avctx->height, frame->linesize[0]);
     else
-        ret = decode_mvc2(avctx, &gb, s->frame->data[0],
-                          avctx->width, avctx->height, s->frame->linesize[0],
+        ret = decode_mvc2(avctx, &gb, frame->data[0],
+                          avctx->width, avctx->height, frame->linesize[0],
                           s->vflip);
     if (ret < 0)
         return ret;
 
+    frame->pict_type = AV_PICTURE_TYPE_I;
+    frame->key_frame = 1;
+
     *got_frame = 1;
-    if ((ret = av_frame_ref(data, s->frame)) < 0)
-        return ret;
 
     return avpkt->size;
 }
 
-static av_cold int mvc_decode_end(AVCodecContext *avctx)
-{
-    MvcContext *s = avctx->priv_data;
-
-    av_frame_free(&s->frame);
-
-    return 0;
-}
-
 #if CONFIG_MVC1_DECODER
 AVCodec ff_mvc1_decoder = {
     .name           = "mvc1",
@@ -272,7 +260,6 @@ AVCodec ff_mvc1_decoder = {
     .id             = AV_CODEC_ID_MVC1,
     .priv_data_size = sizeof(MvcContext),
     .init           = mvc_decode_init,
-    .close          = mvc_decode_end,
     .decode         = mvc_decode_frame,
     .capabilities   = AV_CODEC_CAP_DR1,
 };
@@ -286,7 +273,6 @@ AVCodec ff_mvc2_decoder = {
     .id             = AV_CODEC_ID_MVC2,
     .priv_data_size = sizeof(MvcContext),
     .init           = mvc_decode_init,
-    .close          = mvc_decode_end,
     .decode         = mvc_decode_frame,
     .capabilities   = AV_CODEC_CAP_DR1,
 };