Audio::Timestamp VideoDecoder::FixedRateVideoTrack::getFrameTime(uint frame) const {
// Try to get as accurate as possible, considering we have a fractional frame rate
// (which Audio::Timestamp doesn't support).
Common::Rational frameRate = getFrameRate();
// Try to keep it in terms of the frame rate, if the frame rate is a whole
// number.
if (frameRate.getDenominator() == 1)
return Audio::Timestamp(0, frame, frameRate.toInt());
// Convert as best as possible
Common::Rational time = frameRate.getInverse() * frame;
return Audio::Timestamp(0, time.getNumerator(), time.getDenominator());
}
void Movie::setTime(const TimeValue time, const TimeScale scale) {
if (_video) {
// Don't go past the ends of the movie
Common::Rational timeFrac = Common::Rational(time, ((scale == 0) ? getScale() : scale));
if (timeFrac < Common::Rational(_startTime, _startScale))
timeFrac = Common::Rational(_startTime, _startScale);
else if (timeFrac >= Common::Rational(_stopTime, _stopScale))
return;
_video->seek(Audio::Timestamp(0, timeFrac.getNumerator(), timeFrac.getDenominator()));
_time = timeFrac;
_lastMillis = 0;
}
}