C++ (Cpp) Timestamp::framerate示例

示例#1

uint VideoDecoder::FixedRateVideoTrack::getFrameAtTime(const Audio::Timestamp &time) const {
	Common::Rational frameRate = getFrameRate();

	// Easy conversion
	if (frameRate == time.framerate())
		return time.totalNumberOfFrames();

	// Default case
	return (time.totalNumberOfFrames() * frameRate / time.framerate()).toInt();
}

示例#2

文件： video_decoder.cpp 项目： 86400/scummvm

uint VideoDecoder::FixedRateVideoTrack::getFrameAtTime(const Audio::Timestamp &time) const {
	Common::Rational frameRate = getFrameRate();

	// Easy conversion
	if (frameRate == time.framerate())
		return time.totalNumberOfFrames();

	// Create the rational based on the time first to hopefully cancel out
	// *something* when multiplying by the frameRate (which can be large in
	// some AVI videos).
	return (Common::Rational(time.totalNumberOfFrames(), time.framerate()) * frameRate).toInt();
}