[FFmpeg-cvslog] avcodec/pngdec: apng: fix output buffer filling when no blending is needed.

[Benoit Fouet]

ffmpeg | branch: master | Benoit Fouet <benoit.fouet at free.fr> | Fri Nov 28 16:54:09 2014 +0100| [ebf2052a6177ccdb16c1b50ffb49b4bf8bd11358] | committer: Michael Niedermayer

avcodec/pngdec: apng: fix output buffer filling when no blending is needed.

Signed-off-by: Michael Niedermayer <michaelni at gmx.at>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=ebf2052a6177ccdb16c1b50ffb49b4bf8bd11358
---

 libavcodec/pngdec.c |   10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/libavcodec/pngdec.c b/libavcodec/pngdec.c
index a330d36..9e52d0b 100644
--- a/libavcodec/pngdec.c
+++ b/libavcodec/pngdec.c
@@ -927,7 +927,17 @@ static int handle_p_frame_apng(AVCodecContext *avctx, PNGDecContext *s,
             pd      += s->image_linesize;
             pd_last += s->image_linesize;
         }
+    } else {
+        for (j = s->y_offset; j < s->y_offset + s->cur_h; j++) {
+            for (i = 0; i < s->x_offset * s->bpp; i++)
+                pd[i] = pd_last[i];
+            for (i = (s->x_offset + s->cur_w) * s->bpp; i < ls; i++)
+                pd[i] = pd_last[i];
+            pd      += s->image_linesize;
+            pd_last += s->image_linesize;
+        }
     }
+
     for (j = s->y_offset + s->cur_h; j < s->height; j++) {
         for (i = 0; i < ls; i++)
             pd[i] = pd_last[i];