chan.attr.num_subbuf = DEFAULT_CHANNEL_SUBBUF_NUM;
chan.attr.switch_timer_interval = DEFAULT_CHANNEL_SWITCH_TIMER;
chan.attr.read_timer_interval = DEFAULT_CHANNEL_READ_TIMER;
chan.attr.num_subbuf = DEFAULT_CHANNEL_SUBBUF_NUM;
chan.attr.switch_timer_interval = DEFAULT_CHANNEL_SWITCH_TIMER;
chan.attr.read_timer_interval = DEFAULT_CHANNEL_READ_TIMER;