ChannelType       483 libbase/RTMP.h     bool hasPacket(ChannelType t, size_t channel) const;
ChannelType       489 libbase/RTMP.h     RTMPPacket& getPacket(ChannelType t, size_t channel);
ChannelType       495 libbase/RTMP.h     RTMPPacket& storePacket(ChannelType t, size_t channel, const RTMPPacket& p);