[FFmpeg-cvslog] sgi: fix end of line boundary detection

[Michael Niedermayer]

ffmpeg | branch: master | Michael Niedermayer <michaelni at gmx.at> | Sun Aug 12 05:32:07 2012 +0200| [0279d1d0946a854aa08919abd05b7f2da433823e] | committer: Vittorio Giovara

sgi: fix end of line boundary detection

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=0279d1d0946a854aa08919abd05b7f2da433823e
---

 libavcodec/sgidec.c |    6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/libavcodec/sgidec.c b/libavcodec/sgidec.c
index 91b68eb..112a181 100644
--- a/libavcodec/sgidec.c
+++ b/libavcodec/sgidec.c
@@ -48,13 +48,14 @@ static int expand_rle_row(SgiState *s, uint8_t *out_buf,
 {
     unsigned char pixel, count;
     unsigned char *orig = out_buf;
+    uint8_t *out_end = out_buf + len;
 
-    while (1) {
+    while (out_buf < out_end) {
         if (bytestream2_get_bytes_left(&s->g) < 1)
             return AVERROR_INVALIDDATA;
         pixel = bytestream2_get_byteu(&s->g);
         if (!(count = (pixel & 0x7f))) {
-            return (out_buf - orig) / pixelstride;
+            break;
         }
 
         /* Check for buffer overflow. */
@@ -77,6 +78,7 @@ static int expand_rle_row(SgiState *s, uint8_t *out_buf,
             }
         }
     }
+    return (out_buf - orig) / pixelstride;
 }
 
 /**