From fce2200da05d66d59f3e34e5af836a7c7550cb44 Mon Sep 17 00:00:00 2001
From: Steven Johnson <>
Date: Fri, 24 Nov 2006 00:16:32 +0000
Subject: [PATCH] Implement DELTA_FLI opcodes correctly. Patch by Steven
 Johnson

Originally committed as revision 7165 to svn://svn.ffmpeg.org/ffmpeg/trunk
---
 libavcodec/flicvideo.c | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/libavcodec/flicvideo.c b/libavcodec/flicvideo.c
index 6a80a15767..9cbc4f3f32 100644
--- a/libavcodec/flicvideo.c
+++ b/libavcodec/flicvideo.c
@@ -246,9 +246,15 @@ static int flic_decode_frame_8BPP(AVCodecContext *avctx,
             while (compressed_lines > 0) {
                 line_packets = LE_16(&buf[stream_ptr]);
                 stream_ptr += 2;
-                if (line_packets < 0) {
+                if ((line_packets & 0xC000) == 0xC000) {
+                    // line skip opcode
                     line_packets = -line_packets;
                     y_ptr += line_packets * s->frame.linesize[0];
+                } else if ((line_packets & 0xC000) == 0x4000) {
+                    av_log(avctx, AV_LOG_ERROR, "Undefined opcode (%x) in DELTA_FLI\n", line_packets);
+                } else if ((line_packets & 0xC000) == 0x8000) {
+                    // "last byte" opcode
+                    pixels[y_ptr + s->frame.linesize[0] - 1] = line_packets & 0xff;
                 } else {
                     compressed_lines--;
                     pixel_ptr = y_ptr;