void SeekableBinkDecoder::seekToFrame(uint32 frame) {
assert(frame < _frames.size());
// Fast path
if ((int32)frame == _curFrame + 1)
return;
// Stop all audio (for now)
stopAudio();
// Track down the keyframe
_curFrame = findKeyFrame(frame) - 1;
while (_curFrame < (int32)frame - 1)
skipNextFrame();
// Map out the starting point
Common::Rational startTime = frame * 1000 / getFrameRate();
_startTime = g_system->getMillis() - startTime.toInt();
resetPauseStartTime();
// Adjust the audio starting point
if (_audioTrack < _audioTracks.size()) {
Common::Rational audioStartTime = (frame + 1) * 1000 / getFrameRate();
_audioStartOffset = audioStartTime.toInt();
}
// Restart the audio
startAudio();
}
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();
if (frameRate == frameRate.toInt()) // The nice case (a whole number)
return Audio::Timestamp(0, frame, frameRate.toInt());
// Just convert to milliseconds.
Common::Rational time = frame * 1000;
time /= frameRate;
return Audio::Timestamp(time.toInt(), 1000);
}
Audio::Timestamp VideoDecoder::FixedRateVideoTrack::getDuration() const {
// Since Audio::Timestamp doesn't support a fractional frame rate, we're currently
// just converting to milliseconds.
Common::Rational time = getFrameCount() * 1000;
time /= getFrameRate();
return time.toInt();
}
uint32 VideoDecoder::FixedRateVideoTrack::getNextFrameStartTime() const {
if (endOfTrack() || getCurFrame() < 0)
return 0;
Common::Rational time = (getCurFrame() + 1) * 1000;
time /= getFrameRate();
return time.toInt();
}
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 ZVision::onMouseMove(const Common::Point &pos) {
Common::Point imageCoord(_renderManager->screenSpaceToImageSpace(pos));
bool cursorWasChanged = _scriptManager->onMouseMove(pos, imageCoord);
// Graph of the function governing rotation velocity:
//
// |---------------- working window ------------------|
// ^ |---------|
// | |
// +Max velocity | rotation screen edge offset
// | /|
// | / |
// | / |
// | / |
// | / |
// | / |
// | / |
// | / |
// | / |
// Zero velocity |______________________________ ______________________________/_________|__________________________>
// | Position -> | /
// | | /
// | | /
// | | /
// | | /
// | | /
// | | /
// | | /
// | | /
// -Max velocity | |/
// |
// |
// ^
if (_workingWindow.contains(pos)) {
RenderTable::RenderState renderState = _renderManager->getRenderTable()->getRenderState();
if (renderState == RenderTable::PANORAMA) {
if (pos.x >= _workingWindow.left && pos.x < _workingWindow.left + ROTATION_SCREEN_EDGE_OFFSET) {
// Linear function of distance to the left edge (y = -mx + b)
// We use fixed point math to get better accuracy
Common::Rational velocity = (Common::Rational(MAX_ROTATION_SPEED, ROTATION_SCREEN_EDGE_OFFSET) * (pos.x - _workingWindow.left)) - MAX_ROTATION_SPEED;
_renderManager->setBackgroundVelocity(velocity.toInt());
_cursorManager->setLeftCursor();
cursorWasChanged = true;
} else if (pos.x <= _workingWindow.right && pos.x > _workingWindow.right - ROTATION_SCREEN_EDGE_OFFSET) {
// Linear function of distance to the right edge (y = mx)
// We use fixed point math to get better accuracy
Common::Rational velocity = Common::Rational(MAX_ROTATION_SPEED, ROTATION_SCREEN_EDGE_OFFSET) * (pos.x - _workingWindow.right + ROTATION_SCREEN_EDGE_OFFSET);
_renderManager->setBackgroundVelocity(velocity.toInt());
_cursorManager->setRightCursor();
cursorWasChanged = true;
} else {
_renderManager->setBackgroundVelocity(0);
}
} else if (renderState == RenderTable::TILT) {
if (pos.y >= _workingWindow.top && pos.y < _workingWindow.top + ROTATION_SCREEN_EDGE_OFFSET) {
// Linear function of distance to top edge
// We use fixed point math to get better accuracy
Common::Rational velocity = (Common::Rational(MAX_ROTATION_SPEED, ROTATION_SCREEN_EDGE_OFFSET) * (pos.y - _workingWindow.top)) - MAX_ROTATION_SPEED;
_renderManager->setBackgroundVelocity(velocity.toInt());
_cursorManager->setUpCursor();
cursorWasChanged = true;
} else if (pos.y <= _workingWindow.bottom && pos.y > _workingWindow.bottom - ROTATION_SCREEN_EDGE_OFFSET) {
// Linear function of distance to the bottom edge (y = mx)
// We use fixed point math to get better accuracy
Common::Rational velocity = Common::Rational(MAX_ROTATION_SPEED, ROTATION_SCREEN_EDGE_OFFSET) * (pos.y - _workingWindow.bottom + ROTATION_SCREEN_EDGE_OFFSET);
_renderManager->setBackgroundVelocity(velocity.toInt());
_cursorManager->setDownCursor();
cursorWasChanged = true;
} else {
_renderManager->setBackgroundVelocity(0);
}
}
} else {
_renderManager->setBackgroundVelocity(0);
}
if (!cursorWasChanged) {
_cursorManager->revertToIdle();
}
}
uint32 FixedRateVideoDecoder::getFrameBeginTime(uint32 frame) const {
Common::Rational beginTime = frame * 1000;
beginTime /= getFrameRate();
return beginTime.toInt();
}
uint32 SeekableBinkDecoder::getDuration() const
{
Common::Rational duration = getFrameCount() * 1000 / getFrameRate();
return duration.toInt();
}
void SeekableBinkDecoder::seekToTime(Audio::Timestamp time) {
// Try to find the last frame that should have been decoded
Common::Rational frame = time.msecs() * getFrameRate() / 1000;
seekToFrame(frame.toInt());
}