https://github.com/alibaba/CicadaPlayer/blob/release/0.4.4/mediaPlayer/SuperMediaPlayer.cpp核心关键函数 int64_t SuperMediaPlayer::getPlayerBufferDuration(bool gotMax, bool internal) 17个地方出现: getPlayerBufferDuration的durations 数组 分别 对音频、视频、字幕处理。因此,设置了一个三个元素的durations数组