X-Git-Url: https://git.nihav.org/?p=nihav.git;a=blobdiff_plain;f=nihav-realmedia%2Fsrc%2Fcodecs%2Frv3040.rs;h=d19e3fe5c520805d8ae760e84da98ec7b78b7b4d;hp=640de417ebeb572a8ad0a5b145feb96a54dadb4a;hb=6e24ec0bcf9d521c66551eebd198400c5342b0be;hpb=d8ee06da85fe5e695f4eeaf3db72c99e1ac506d2

diff --git a/nihav-realmedia/src/codecs/rv3040.rs b/nihav-realmedia/src/codecs/rv3040.rs
index 640de41..d19e3fe 100644
--- a/nihav-realmedia/src/codecs/rv3040.rs
+++ b/nihav-realmedia/src/codecs/rv3040.rs
@@ -1106,6 +1106,22 @@ impl RV34Decoder {
                 self.base_ts += 1 << 13;
             }
         }
+        match hdr0.ftype {
+            FrameType::P => {
+                if self.ipbs.get_lastref().is_none() {
+                    return Err(DecoderError::MissingReference);
+                }
+            },
+            FrameType::B => {
+                if self.ipbs.get_lastref().is_none() {
+                    return Err(DecoderError::MissingReference);
+                }
+                if self.ipbs.get_nextref().is_none() {
+                    return Err(DecoderError::MissingReference);
+                }
+            },
+            _ => {},
+        };
         let ts_diff = (self.next_ts << 3).wrapping_sub(hdr0.pts << 3) >> 3;
         let ts = self.base_ts + (self.next_ts as u64) - (ts_diff as u64);
         sstate.trd = (self.next_ts << 3).wrapping_sub(self.last_ts << 3) >> 3;