- if self.frames.len() < self.max_depth {
- let cur_ft = fref.get_frame_type();
- if cur_ft != FrameType::B {
- self.frames.push(fref);
- self.last_ft = cur_ft;
- } else {
- let pframe = self.frames.pop();
- if pframe.is_some() {
- self.frames.push(fref);
- self.frames.push(pframe.unwrap());
- } else {
- self.last_ft = cur_ft;
- }
- }
- true
+ if self.rframe.is_some() && self.bframe.is_some() { return false; }
+ let is_b = fref.get_frame_type() == FrameType::B;
+ if is_b && self.bframe.is_some() { return false; }
+ if is_b {
+ self.bframe = Some(fref);