成员的完整列表，这些成员属于 com.netease.lava.nertc.sdk.audio.NERtcAudioFrameObserver,包括所有继承而来的类成员

onMixedAudioFrame(NERtcAudioFrame audioFrame)	com.netease.lava.nertc.sdk.audio.NERtcAudioFrameObserver
onPlaybackAudioFrameBeforeMixingForPlayStreaming(String playStreamId, NERtcAudioFrame audioFrame)	com.netease.lava.nertc.sdk.audio.NERtcAudioFrameObserver
onPlaybackAudioFrameBeforeMixingWithUserID(long userID, NERtcAudioFrame audioFrame)	com.netease.lava.nertc.sdk.audio.NERtcAudioFrameObserver
onPlaybackAudioFrameBeforeMixingWithUserID(long userID, NERtcAudioFrame audioFrame, long channelId)	com.netease.lava.nertc.sdk.audio.NERtcAudioFrameObserver
onPlaybackFrame(NERtcAudioFrame audioFrame)	com.netease.lava.nertc.sdk.audio.NERtcAudioFrameObserver
onPlaybackSubStreamAudioFrameBeforeMixingWithUserID(long userID, NERtcAudioFrame audioFrame, long channelId)	com.netease.lava.nertc.sdk.audio.NERtcAudioFrameObserver
onRecordFrame(NERtcAudioFrame audioFrame)	com.netease.lava.nertc.sdk.audio.NERtcAudioFrameObserver
onRecordSubStreamAudioFrame(NERtcAudioFrame audioFrame)	com.netease.lava.nertc.sdk.audio.NERtcAudioFrameObserver