c93: use the AVFrame API properly.

libavcodec/c93.c

@@ -24,7 +24,7 @@
 #include "internal.h"
 
 typedef struct {
-    AVFrame pictures[2];
+    AVFrame *pictures[2];
     int currentpic;
 } C93DecoderContext;
 
@@ -46,21 +46,27 @@ typedef enum {
 #define C93_HAS_PALETTE 0x01
 #define C93_FIRST_FRAME 0x02
 
-static av_cold int decode_init(AVCodecContext *avctx)
+static av_cold int decode_end(AVCodecContext *avctx)
 {
-    C93DecoderContext *s = avctx->priv_data;
-    avctx->pix_fmt = AV_PIX_FMT_PAL8;
-    avcodec_get_frame_defaults(&s->pictures[0]);
-    avcodec_get_frame_defaults(&s->pictures[1]);
+    C93DecoderContext * const c93 = avctx->priv_data;
+
+    av_frame_free(&c93->pictures[0]);
+    av_frame_free(&c93->pictures[1]);
+
     return 0;
 }
 
-static av_cold int decode_end(AVCodecContext *avctx)
+static av_cold int decode_init(AVCodecContext *avctx)
 {
-    C93DecoderContext * const c93 = avctx->priv_data;
+    C93DecoderContext *s = avctx->priv_data;
+    avctx->pix_fmt = AV_PIX_FMT_PAL8;
 
-    av_frame_unref(&c93->pictures[0]);
-    av_frame_unref(&c93->pictures[1]);
+    s->pictures[0] = av_frame_alloc();
+    s->pictures[1] = av_frame_alloc();
+    if (!s->pictures[0] || !s->pictures[1]) {
+        decode_end(avctx);
+        return AVERROR(ENOMEM);
+    }
 
     return 0;
 }
@@ -121,8 +127,8 @@ static int decode_frame(AVCodecContext *avctx, void *data,
     const uint8_t *buf = avpkt->data;
     int buf_size = avpkt->size;
     C93DecoderContext * const c93 = avctx->priv_data;
-    AVFrame * const newpic = &c93->pictures[c93->currentpic];
-    AVFrame * const oldpic = &c93->pictures[c93->currentpic^1];
+    AVFrame * const newpic = c93->pictures[c93->currentpic];
+    AVFrame * const oldpic = c93->pictures[c93->currentpic^1];
     GetByteContext gb;
     uint8_t *out;
     int stride, ret, i, x, y, b, bt = 0;