[FFmpeg-cvslog] atrac9dec: relax gradient value requirements

[Rostislav Pehlivanov]

ffmpeg | branch: master | Rostislav Pehlivanov <atomnuker at gmail.com> | Mon Aug 27 23:12:36 2018 +0100| [6213cf73945db1dd488ec51d6c4214b496833d7b] | committer: Rostislav Pehlivanov

atrac9dec: relax gradient value requirements

Unlike the range, the gradient start value does not have to be lower
than the end value.
Does allow more files to be correctly decoded without errors.

Signed-off-by: Rostislav Pehlivanov <atomnuker at gmail.com>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=6213cf73945db1dd488ec51d6c4214b496833d7b
---

 libavcodec/atrac9dec.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/libavcodec/atrac9dec.c b/libavcodec/atrac9dec.c
index 629757f63d..28f8fef174 100644
--- a/libavcodec/atrac9dec.c
+++ b/libavcodec/atrac9dec.c
@@ -123,7 +123,7 @@ static inline int parse_gradient(ATRAC9Context *s, ATRAC9BlockData *b,
     if (grad_range[0] >= grad_range[1] || grad_range[1] > 47)
         return AVERROR_INVALIDDATA;
 
-    if (grad_value[0] >= grad_value[1] || grad_value[1] >= 32)
+    if (grad_value[0] > 31 || grad_value[1] > 31)
         return AVERROR_INVALIDDATA;
 
     if (b->grad_boundary > b->q_unit_cnt)