两个重要的IntervalBudget

webrtc-checkout\src\modules\pacing\pacing_controller.h
class PacingController {
**
  // This is the media budget, keeping track of how many bits of media
  // we can pace out during the current interval.
  IntervalBudget media_budget_;
  // This is the padding budget, keeping track of how many bits of padding we're
  // allowed to send out during the current interval. This budget will be
  // utilized when there's no media to send.
  IntervalBudget padding_budget_;
**

两种设置目标码率的途径

第一种

第二种

再看ProcessPackets

《12-19 Pacer》