[FFmpeg-cvslog] commit: Lagarith: fix decoding of one-coloured frames by reading the per-plane ( Reimar Döffinger )

[git at videolan.org]

ffmpeg | branch: master | Reimar D?ffinger <Reimar.Doeffinger at gmx.de> | Sat Jan 15 12:44:48 2011 +0000| [b0c8b8a69d37b55a03a600d753113f4314404080] | committer: Reimar D?ffinger 

Lagarith: fix decoding of one-coloured frames by reading the per-plane
color value instead of always taking 0 (resulting in green frames).
Fixes issue issue2531.

Originally committed as revision 26363 to svn://svn.ffmpeg.org/ffmpeg/trunk

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=b0c8b8a69d37b55a03a600d753113f4314404080
---

 libavcodec/lagarith.c |    8 ++++++--
 1 files changed, 6 insertions(+), 2 deletions(-)

diff --git a/libavcodec/lagarith.c b/libavcodec/lagarith.c
index 95179df..1bf61bd 100644
--- a/libavcodec/lagarith.c
+++ b/libavcodec/lagarith.c
@@ -405,9 +405,13 @@ static int lag_decode_arith_plane(LagarithContext *l, uint8_t *dst,
             }
         }
     } else if (esc_count == 0xff) {
-        /* Plane is a solid run of 0 bytes */
+        /* Plane is a solid run of given value */
         for (i = 0; i < height; i++)
-            memset(dst + i * stride, 0, width);
+            memset(dst + i * stride, src[1], width);
+        /* Do not apply prediction.
+           Note: memset to 0 above, setting first value to src[1]
+           and applying prediction gives the same result. */
+        return 0;
     } else {
         av_log(l->avctx, AV_LOG_ERROR,
                "Invalid zero run escape code! (%#x)\n", esc_count);