From: Kostya Shishkov <kostya.shishkov@gmail.com>
Date: Tue, 7 Apr 2020 14:33:48 +0000 (+0200)
Subject: rv10: check quantiser
X-Git-Url: https://git.nihav.org/?a=commitdiff_plain;h=f8b4bb7b585c736a76aabc2af6757978fce649ad;p=nihav.git

rv10: check quantiser
---

diff --git a/nihav-realmedia/src/codecs/rv10.rs b/nihav-realmedia/src/codecs/rv10.rs
index 7cfc4c3..be4c76d 100644
--- a/nihav-realmedia/src/codecs/rv10.rs
+++ b/nihav-realmedia/src/codecs/rv10.rs
@@ -258,6 +258,7 @@ impl<'a> BlockDecoder for RealVideo10BR<'a> {
                     if dquant {
                         let idx = br.read(2)? as usize;
                         q = ((q as i16) + (H263_DQUANT_TAB[idx] as i16)) as u8;
+                        validate!(q < 32);
                     }
                     Ok(BlockInfo::new(Type::I, cbp, q))
                 },
@@ -276,6 +277,7 @@ impl<'a> BlockDecoder for RealVideo10BR<'a> {
                         if dquant {
                             let idx = br.read(2)? as usize;
                             q = ((q as i16) + (H263_DQUANT_TAB[idx] as i16)) as u8;
+                            validate!(q < 32);
                         }
                         let binfo = BlockInfo::new(Type::I, cbp, q);
                         return Ok(binfo);
@@ -289,6 +291,7 @@ impl<'a> BlockDecoder for RealVideo10BR<'a> {
                     if dquant {
                         let idx = br.read(2)? as usize;
                         q = ((q as i16) + (H263_DQUANT_TAB[idx] as i16)) as u8;
+                        validate!(q < 32);
                     }
                     let mut binfo = BlockInfo::new(Type::P, cbp, q);
                     if !is_4x4 {