mpeg12: move mpeg_decode_frame() lower

Avoids a forward declaration of decode_chunks().

libavcodec/mpeg12.c

@@ -2185,54 +2185,6 @@ int ff_mpeg1_find_frame_end(ParseContext *pc, const uint8_t *buf, int buf_size,
     return END_NOT_FOUND;
 }
 
-static int decode_chunks(AVCodecContext *avctx,
-                         AVFrame *picture, int *data_size,
-                         const uint8_t *buf, int buf_size);
-
-/* handle buffering and image synchronisation */
-static int mpeg_decode_frame(AVCodecContext *avctx,
-                             void *data, int *data_size,
-                             AVPacket *avpkt)
-{
-    const uint8_t *buf = avpkt->data;
-    int buf_size = avpkt->size;
-    Mpeg1Context *s = avctx->priv_data;
-    AVFrame *picture = data;
-    MpegEncContext *s2 = &s->mpeg_enc_ctx;
-    av_dlog(avctx, "fill_buffer\n");
-
-    if (buf_size == 0 || (buf_size == 4 && AV_RB32(buf) == SEQ_END_CODE)) {
-        /* special case for last picture */
-        if (s2->low_delay == 0 && s2->next_picture_ptr) {
-            *picture = s2->next_picture_ptr->f;
-            s2->next_picture_ptr = NULL;
-
-            *data_size = sizeof(AVFrame);
-        }
-        return buf_size;
-    }
-
-    if (s2->flags & CODEC_FLAG_TRUNCATED) {
-        int next = ff_mpeg1_find_frame_end(&s2->parse_context, buf, buf_size, NULL);
-
-        if (ff_combine_frame(&s2->parse_context, next, (const uint8_t **)&buf, &buf_size) < 0)
-            return buf_size;
-    }
-
-    if (s->mpeg_enc_ctx_allocated == 0 && avctx->codec_tag == AV_RL32("VCR2"))
-        vcr2_init_sequence(avctx);
-
-    s->slice_count = 0;
-
-    if (avctx->extradata && !avctx->frame_number) {
-        int ret = decode_chunks(avctx, picture, data_size, avctx->extradata, avctx->extradata_size);
-        if (ret < 0 && (avctx->err_recognition & AV_EF_EXPLODE))
-            return ret;
-    }
-
-    return decode_chunks(avctx, picture, data_size, buf, buf_size);
-}
-
 static int decode_chunks(AVCodecContext *avctx,
                          AVFrame *picture, int *data_size,
                          const uint8_t *buf, int buf_size)
@@ -2464,6 +2416,50 @@ static int decode_chunks(AVCodecContext *avctx,
     }
 }
 
+static int mpeg_decode_frame(AVCodecContext *avctx,
+                             void *data, int *data_size,
+                             AVPacket *avpkt)
+{
+    const uint8_t *buf = avpkt->data;
+    int buf_size = avpkt->size;
+    Mpeg1Context *s = avctx->priv_data;
+    AVFrame *picture = data;
+    MpegEncContext *s2 = &s->mpeg_enc_ctx;
+    av_dlog(avctx, "fill_buffer\n");
+
+    if (buf_size == 0 || (buf_size == 4 && AV_RB32(buf) == SEQ_END_CODE)) {
+        /* special case for last picture */
+        if (s2->low_delay == 0 && s2->next_picture_ptr) {
+            *picture = s2->next_picture_ptr->f;
+            s2->next_picture_ptr = NULL;
+
+            *data_size = sizeof(AVFrame);
+        }
+        return buf_size;
+    }
+
+    if (s2->flags & CODEC_FLAG_TRUNCATED) {
+        int next = ff_mpeg1_find_frame_end(&s2->parse_context, buf, buf_size, NULL);
+
+        if (ff_combine_frame(&s2->parse_context, next, (const uint8_t **)&buf, &buf_size) < 0)
+            return buf_size;
+    }
+
+    if (s->mpeg_enc_ctx_allocated == 0 && avctx->codec_tag == AV_RL32("VCR2"))
+        vcr2_init_sequence(avctx);
+
+    s->slice_count = 0;
+
+    if (avctx->extradata && !avctx->frame_number) {
+        int ret = decode_chunks(avctx, picture, data_size, avctx->extradata, avctx->extradata_size);
+        if (ret < 0 && (avctx->err_recognition & AV_EF_EXPLODE))
+            return ret;
+    }
+
+    return decode_chunks(avctx, picture, data_size, buf, buf_size);
+}
+
+
 static void flush(AVCodecContext *avctx)
 {
     Mpeg1Context *s = avctx->priv_data;