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();
}
void QuickTimeDecoder::VideoTrackHandler::enterNewEditList(bool bufferFrames) {
// Bypass all empty edit lists first
while (!atLastEdit() && _parent->editList[_curEdit].mediaTime == -1)
_curEdit++;
if (atLastEdit())
return;
uint32 frameNum = 0;
bool done = false;
uint32 totalDuration = 0;
uint32 prevDuration = 0;
// Track down where the mediaTime is in the media
// This is basically time -> frame mapping
// Note that this code uses first frame = 0
for (int32 i = 0; i < _parent->timeToSampleCount && !done; i++) {
for (int32 j = 0; j < _parent->timeToSample[i].count; j++) {
if (totalDuration == (uint32)_parent->editList[_curEdit].mediaTime) {
done = true;
prevDuration = totalDuration;
break;
} else if (totalDuration > (uint32)_parent->editList[_curEdit].mediaTime) {
done = true;
frameNum--;
break;
}
prevDuration = totalDuration;
totalDuration += _parent->timeToSample[i].duration;
frameNum++;
}
}
if (bufferFrames) {
// Track down the keyframe
// Then decode until the frame before target
_curFrame = findKeyFrame(frameNum) - 1;
while (_curFrame < (int32)frameNum - 1)
bufferNextFrame();
} else {
// Since frameNum is the frame that needs to be displayed
// we'll set _curFrame to be the "last frame displayed"
_curFrame = frameNum - 1;
}
_nextFrameStartTime = getCurEditTimeOffset();
// Set an override for the duration since we came up in-between two frames
if (prevDuration != totalDuration)
_durationOverride = totalDuration - prevDuration;
else
_durationOverride = -1;
}
void QuickTimeDecoder::VideoTrackHandler::enterNewEditList(bool bufferFrames) {
// Bypass all empty edit lists first
while (!endOfTrack() && _parent->editList[_curEdit].mediaTime == -1)
_curEdit++;
if (endOfTrack())
return;
uint32 frameNum = 0;
bool done = false;
uint32 totalDuration = 0;
uint32 prevDuration = 0;
// Track down where the mediaTime is in the media
for (int32 i = 0; i < _parent->timeToSampleCount && !done; i++) {
for (int32 j = 0; j < _parent->timeToSample[i].count; j++) {
if (totalDuration == (uint32)_parent->editList[_curEdit].mediaTime) {
done = true;
prevDuration = totalDuration;
break;
} else if (totalDuration > (uint32)_parent->editList[_curEdit].mediaTime) {
done = true;
frameNum--;
break;
}
prevDuration = totalDuration;
totalDuration += _parent->timeToSample[i].duration;
frameNum++;
}
}
if (bufferFrames) {
// Track down the keyframe
_curFrame = findKeyFrame(frameNum) - 1;
while (_curFrame < (int32)frameNum - 1)
bufferNextFrame();
} else {
_curFrame = frameNum - 1;
}
_nextFrameStartTime = getCurEditTimeOffset();
// Set an override for the duration since we came up in-between two frames
if (prevDuration != totalDuration)
_durationOverride = totalDuration - prevDuration;
}
void QuickTimeDecoder::VideoTrackHandler::seekToTime(Audio::Timestamp time) {
// First, figure out what edit we're in
time = time.convertToFramerate(_parent->timeScale);
// Continue until we get to where we need to be
for (_curEdit = 0; !endOfTrack(); _curEdit++)
if ((uint32)time.totalNumberOfFrames() >= getCurEditTimeOffset() && (uint32)time.totalNumberOfFrames() < getCurEditTimeOffset() + getCurEditTrackDuration())
break;
// This track is done
if (endOfTrack())
return;
enterNewEditList(false);
// One extra check for the end of a track
if (endOfTrack())
return;
// Now we're in the edit and need to figure out what frame we need
while (getRateAdjustedFrameTime() < (uint32)time.totalNumberOfFrames()) {
_curFrame++;
if (_durationOverride >= 0) {
_nextFrameStartTime += _durationOverride;
_durationOverride = -1;
} else {
_nextFrameStartTime += getFrameDuration();
}
}
// All that's left is to figure out what our starting time is going to be
// Compare the starting point for the frame to where we need to be
_holdNextFrameStartTime = getRateAdjustedFrameTime() != (uint32)time.totalNumberOfFrames();
// If we went past the time, go back a frame
if (_holdNextFrameStartTime)
_curFrame--;
// Handle the keyframe here
int32 destinationFrame = _curFrame + 1;
assert(destinationFrame < (int32)_parent->frameCount);
_curFrame = findKeyFrame(destinationFrame) - 1;
while (_curFrame < destinationFrame - 1)
bufferNextFrame();
}
void QuickTimeDecoder::seekToFrame(uint32 frame) {
assert(_videoTrackIndex >= 0);
assert(frame < _tracks[_videoTrackIndex]->frameCount);
// Stop all audio (for now)
stopAudio();
// Track down the keyframe
_curFrame = findKeyFrame(frame) - 1;
while (_curFrame < (int32)frame - 1)
decodeNextFrame();
// Map out the starting point
_nextFrameStartTime = 0;
uint32 curFrame = 0;
for (int32 i = 0; i < _tracks[_videoTrackIndex]->timeToSampleCount && curFrame < frame; i++) {
for (int32 j = 0; j < _tracks[_videoTrackIndex]->timeToSample[i].count && curFrame < frame; j++) {
curFrame++;
_nextFrameStartTime += _tracks[_videoTrackIndex]->timeToSample[i].duration;
}
}
// Adjust the video starting point
const Audio::Timestamp curVideoTime(0, _nextFrameStartTime, _tracks[_videoTrackIndex]->timeScale);
_startTime = g_system->getMillis() - curVideoTime.msecs();
resetPauseStartTime();
// Adjust the audio starting point
if (_audioTrackIndex >= 0) {
_audioStartOffset = curVideoTime;
// Seek to the new audio location
setAudioStreamPos(_audioStartOffset);
// Restart the audio
startAudio();
}
}
void QuickTimeDecoder::seekToFrame(uint32 frame) {
assert(_videoStreamIndex >= 0);
assert(frame < _streams[_videoStreamIndex]->nb_frames);
// Stop all audio (for now)
stopAudio();
// Track down the keyframe
_curFrame = findKeyFrame(frame) - 1;
while (_curFrame < (int32)frame - 1)
decodeNextFrame();
// Map out the starting point
_nextFrameStartTime = 0;
uint32 curFrame = 0;
for (int32 i = 0; i < _streams[_videoStreamIndex]->stts_count && curFrame < frame; i++) {
for (int32 j = 0; j < _streams[_videoStreamIndex]->stts_data[i].count && curFrame < frame; j++) {
curFrame++;
_nextFrameStartTime += _streams[_videoStreamIndex]->stts_data[i].duration;
}
}
// Adjust the video starting point
const Audio::Timestamp curVideoTime(0, _nextFrameStartTime, _streams[_videoStreamIndex]->time_scale);
_startTime = g_system->getMillis() - curVideoTime.msecs();
resetPauseStartTime();
// Adjust the audio starting point
if (_audioStreamIndex >= 0) {
_audioStartOffset = curVideoTime;
// Re-create the audio stream
STSDEntry *entry = &_streams[_audioStreamIndex]->stsdEntries[0];
_audStream = Audio::makeQueuingAudioStream(entry->sampleRate, entry->channels == 2);
// First, we need to track down what audio sample we need
Audio::Timestamp curAudioTime(0, _streams[_audioStreamIndex]->time_scale);
uint sample = 0;
bool done = false;
for (int32 i = 0; i < _streams[_audioStreamIndex]->stts_count && !done; i++) {
for (int32 j = 0; j < _streams[_audioStreamIndex]->stts_data[i].count; j++) {
curAudioTime = curAudioTime.addFrames(_streams[_audioStreamIndex]->stts_data[i].duration);
if (curAudioTime > curVideoTime) {
done = true;
break;
}
sample++;
}
}
// Now to track down what chunk it's in
_curAudioChunk = 0;
uint32 totalSamples = 0;
for (uint32 i = 0; i < _streams[_audioStreamIndex]->chunk_count; i++, _curAudioChunk++) {
int sampleToChunkIndex = -1;
for (uint32 j = 0; j < _streams[_audioStreamIndex]->sample_to_chunk_sz; j++)
if (i >= _streams[_audioStreamIndex]->sample_to_chunk[j].first)
sampleToChunkIndex = j;
assert(sampleToChunkIndex >= 0);
totalSamples += _streams[_audioStreamIndex]->sample_to_chunk[sampleToChunkIndex].count;
if (sample < totalSamples) {
totalSamples -= _streams[_audioStreamIndex]->sample_to_chunk[sampleToChunkIndex].count;
break;
}
}
// Reposition the audio stream
readNextAudioChunk();
if (sample != totalSamples) {
// HACK: Skip a certain amount of samples from the stream
// (There's got to be a better way to do this!)
int16 *tempBuffer = new int16[sample - totalSamples];
_audStream->readBuffer(tempBuffer, sample - totalSamples);
delete[] tempBuffer;
debug(3, "Skipping %d audio samples", sample - totalSamples);
}
// Restart the audio
startAudio();
}
}
bool QuickTimeDecoder::VideoTrackHandler::setReverse(bool reverse) {
_reversed = reverse;
if (_reversed) {
if (_parent->editCount != 1) {
// TODO: Myst's holo.mov needs this :(
warning("Can only set reverse without edits");
return false;
}
if (atLastEdit()) {
// If we're at the end of the video, go to the penultimate edit.
// The current frame is set to one beyond the last frame here;
// one "past" the currently displayed frame.
_curEdit = _parent->editCount - 1;
_curFrame = _parent->frameCount;
_nextFrameStartTime = _parent->editList[_curEdit].trackDuration + _parent->editList[_curEdit].timeOffset;
} else if (_holdNextFrameStartTime) {
// We just seeked, so "pivot" around the frame that should be displayed
_curFrame++;
_nextFrameStartTime -= getFrameDuration();
_curFrame++;
} else {
// We need to put _curFrame to be the one after the one that should be displayed.
// Since we're on the frame that should be displaying right now, add one.
_curFrame++;
}
} else {
// Update the edit list, if applicable
// HACK: We're also accepting the time minus one because edit lists
// aren't as accurate as one would hope.
if (!atLastEdit() && getRateAdjustedFrameTime() >= getCurEditTimeOffset() + getCurEditTrackDuration() - 1) {
_curEdit++;
if (atLastEdit())
return true;
}
if (_holdNextFrameStartTime) {
// We just seeked, so "pivot" around the frame that should be displayed
_curFrame--;
_nextFrameStartTime += getFrameDuration();
}
// We need to put _curFrame to be the one before the one that should be displayed.
// Since we're on the frame that should be displaying right now, subtract one.
// (As long as the current frame isn't -1, of course)
if (_curFrame > 0) {
// We then need to handle the keyframe situation
int targetFrame = _curFrame - 1;
_curFrame = findKeyFrame(targetFrame) - 1;
while (_curFrame < targetFrame)
bufferNextFrame();
} else if (_curFrame == 0) {
// Make us start at the first frame (no keyframe needed)
_curFrame--;
}
}
return true;
}
const Graphics::Surface *QuickTimeDecoder::VideoTrackHandler::decodeNextFrame() {
if (endOfTrack())
return 0;
if (_reversed) {
// Subtract one to place us on the frame before the current displayed frame.
_curFrame--;
// We have one "dummy" frame at the end to so the last frame is displayed
// for the right amount of time.
if (_curFrame < 0)
return 0;
// Decode from the last key frame to the frame before the one we need.
// TODO: Probably would be wise to do some caching
int targetFrame = _curFrame;
_curFrame = findKeyFrame(targetFrame) - 1;
while (_curFrame != targetFrame - 1)
bufferNextFrame();
}
const Graphics::Surface *frame = bufferNextFrame();
if (_reversed) {
if (_holdNextFrameStartTime) {
// Don't set the next frame start time here; we just did a seek
_holdNextFrameStartTime = false;
} else {
// Just need to subtract the time
_nextFrameStartTime -= getFrameDuration();
}
} else {
if (_holdNextFrameStartTime) {
// Don't set the next frame start time here; we just did a seek
_holdNextFrameStartTime = false;
} else if (_durationOverride >= 0) {
// Use our own duration from the edit list calculation
_nextFrameStartTime += _durationOverride;
_durationOverride = -1;
} else {
_nextFrameStartTime += getFrameDuration();
}
// Update the edit list, if applicable
// HACK: We're also accepting the time minus one because edit lists
// aren't as accurate as one would hope.
if (!atLastEdit() && getRateAdjustedFrameTime() >= getCurEditTimeOffset() + getCurEditTrackDuration() - 1) {
_curEdit++;
if (!atLastEdit())
enterNewEditList(true);
}
}
if (frame && (_parent->scaleFactorX != 1 || _parent->scaleFactorY != 1)) {
if (!_scaledSurface) {
_scaledSurface = new Graphics::Surface();
_scaledSurface->create(getScaledWidth().toInt(), getScaledHeight().toInt(), getPixelFormat());
}
_decoder->scaleSurface(frame, _scaledSurface, _parent->scaleFactorX, _parent->scaleFactorY);
return _scaledSurface;
}
return frame;
}
bool QuickTimeDecoder::VideoTrackHandler::seek(const Audio::Timestamp &requestedTime) {
uint32 convertedFrames = requestedTime.convertToFramerate(_decoder->_timeScale).totalNumberOfFrames();
for (_curEdit = 0; !atLastEdit(); _curEdit++)
if (convertedFrames >= _parent->editList[_curEdit].timeOffset && convertedFrames < _parent->editList[_curEdit].timeOffset + _parent->editList[_curEdit].trackDuration)
break;
// If we did reach the end of the track, break out
if (atLastEdit())
return true;
// If this track is in an empty edit, position us at the next non-empty
// edit. There's nothing else to do after this.
if (_parent->editList[_curEdit].mediaTime == -1) {
while (!atLastEdit() && _parent->editList[_curEdit].mediaTime == -1)
_curEdit++;
if (!atLastEdit())
enterNewEditList(true);
return true;
}
enterNewEditList(false);
// One extra check for the end of a track
if (atLastEdit())
return true;
// Now we're in the edit and need to figure out what frame we need
Audio::Timestamp time = requestedTime.convertToFramerate(_parent->timeScale);
while (getRateAdjustedFrameTime() < (uint32)time.totalNumberOfFrames()) {
_curFrame++;
if (_durationOverride >= 0) {
_nextFrameStartTime += _durationOverride;
_durationOverride = -1;
} else {
_nextFrameStartTime += getFrameDuration();
}
}
// All that's left is to figure out what our starting time is going to be
// Compare the starting point for the frame to where we need to be
_holdNextFrameStartTime = getRateAdjustedFrameTime() != (uint32)time.totalNumberOfFrames();
// If we went past the time, go back a frame. _curFrame before this point is at the frame
// that should be displayed. This adjustment ensures it is on the frame before the one that
// should be displayed.
if (_holdNextFrameStartTime)
_curFrame--;
if (_reversed) {
// Call setReverse again to update
setReverse(true);
} else {
// Handle the keyframe here
int32 destinationFrame = _curFrame + 1;
assert(destinationFrame < (int32)_parent->frameCount);
_curFrame = findKeyFrame(destinationFrame) - 1;
while (_curFrame < destinationFrame - 1)
bufferNextFrame();
}
return true;
}
