us_to_s
double us_to_s(bigtime_t usecs);
buffers = (int) ceil(us_to_s(duration)*(format.frame_rate/frames_per_buffer(format)));
return (int64) ceil(format.frame_rate*us_to_s(duration));
double us_to_s(bigtime_t usecs);
buffers = (int) ceil(us_to_s(duration)*(format.frame_rate/frames_per_buffer(format)));
return (int64) ceil(format.frame_rate*us_to_s(duration));
double us_to_s(bigtime_t usecs);