avcodec/dfa: don't check for the bitstream version on every copied line

And use av_image_copy_plane() while at it to simplify things for
version != 0x100.

Signed-off-by: James Almer <jamrial@gmail.com>

1 files changed, 7 insertions, 7 deletions

diff --git a/libavcodec/dfa.c b/libavcodec/dfa.c
index 97a9bd5a1f..eaa1e7e33d 100644
--- a/libavcodec/dfa.c
+++ b/libavcodec/dfa.c
@@ -386,8 +386,8 @@ static int dfa_decode_frame(AVCodecContext *avctx,
 
     buf = s->frame_buf;
     dst = frame->data[0];
-    for (i = 0; i < avctx->height; i++) {
-        if(version == 0x100) {
+    if (version == 0x100) {
+        for (i = 0; i < avctx->height; i++) {
             int j;
             const uint8_t *buf1 = buf + (i&3)*(avctx->width/4) + (i/4)*avctx->width;
             int stride = (avctx->height/4)*avctx->width;
@@ -401,12 +401,12 @@ static int dfa_decode_frame(AVCodecContext *avctx,
             for(; j < avctx->width; j++) {
                 dst[j] = buf1[(j/4) + (j&3)*stride];
             }
-        } else {
-            memcpy(dst, buf, avctx->width);
-            buf += avctx->width;
+            dst += frame->linesize[0];
         }
-        dst += frame->linesize[0];
-    }
+    } else
+        av_image_copy_plane(dst, frame->linesize[0], buf, avctx->width,
+                            avctx->width, avctx->height);
+
     memcpy(frame->data[1], s->pal, sizeof(s->pal));
 
     *got_frame = 1;