52033d6ea1
The VUI part an SPS may specify max_num_reorder_frames and max_dec_frame_buffering. These may cause a decoder to buffer a number of frame prior allowing decode, leading to delays, even if no frames using such references (ie B-frames) are sent. Because of this we update any SPS block emitted by the encoder. Also, a bunch of refactoring of H264-related code to reduce code duplication. BUG= Review-Url: https://codereview.webrtc.org/1979443004 Cr-Commit-Position: refs/heads/master@{#13010}