duration_for_frames
const bigtime_t timeBase = duration_for_frames(fMixBufferFrameRate, frameBase);
buffer_duration = duration_for_frames(fInput.format.u.raw_audio.frame_rate,
start + duration_for_frames(fInput.format.u.raw_audio.frame_rate,
start + duration_for_frames(fInput.format.u.raw_audio.frame_rate,
bigtime_t inputBufferLength = duration_for_frames(
bigtime_t outputBufferLength = duration_for_frames(framerate, frames);
if (time < (fLastDataAvailableTime - duration_for_frames(
|| (time + duration_for_frames(fMixBufferFrameRate,
fLastDataAvailableTime - duration_for_frames(fMixBufferFrameRate,
time + duration_for_frames(fMixBufferFrameRate,
bigtime_t duration_for_frames(double framerate, int64 frames);