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();
}
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();
}
void AVIDecoder::AVIAudioTrack::skipAudio(const Audio::Timestamp &time, const Audio::Timestamp &frameTime) {
Audio::Timestamp timeDiff = time.convertToFramerate(_wvInfo.samplesPerSec) - frameTime.convertToFramerate(_wvInfo.samplesPerSec);
int skipFrames = timeDiff.totalNumberOfFrames();
if (skipFrames <= 0)
return;
if (_audStream->isStereo())
skipFrames *= 2;
int16 *tempBuffer = new int16[skipFrames];
_audStream->readBuffer(tempBuffer, skipFrames);
delete[] tempBuffer;
}
bool VideoDecoder::seek(const Audio::Timestamp &time) {
if (!isSeekable())
return false;
// Stop all tracks so they can be seeked
if (isPlaying())
stopAudio();
// Do the actual seeking
if (!seekIntern(time))
return false;
// Seek any external track too
for (TrackListIterator it = _externalTracks.begin(); it != _externalTracks.end(); it++)
if (!(*it)->seek(time))
return false;
_lastTimeChange = time;
// Now that we've seeked, start all tracks again
// Also reset our start time
if (isPlaying()) {
startAudio();
_startTime = g_system->getMillis() - (time.msecs() / _playbackRate).toInt();
}
resetPauseStartTime();
findNextVideoTrack();
_needsUpdate = true;
return true;
}
bool VideoDecoder::seek(const Audio::Timestamp &time) {
if (!isSeekable())
return false;
// Stop all tracks so they can be seeked
if (isPlaying())
stopAudio();
for (TrackList::iterator it = _tracks.begin(); it != _tracks.end(); it++)
if (!(*it)->seek(time))
return false;
_lastTimeChange = time;
// Now that we've seeked, start all tracks again
// Also reset our start time
if (isPlaying()) {
startAudio();
_startTime = g_system->getMillis() - time.msecs();
}
resetPauseStartTime();
_needsUpdate = true;
return true;
}
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();
}
int16 ScriptFunctions::sfGetSoundEnergy(int16 argc, int16 *argv) {
// This is called while in-game voices are played to animate
// mouths when NPCs are talking
int result = 0;
if (_vm->_mixer->isSoundHandleActive(_audioStreamHandle) && _vm->_soundEnergyArray) {
while (_vm->_soundEnergyIndex < _vm->_soundEnergyArray->size()) {
SoundEnergyItem *soundEnergyItem = &(*_vm->_soundEnergyArray)[_vm->_soundEnergyIndex];
const Audio::Timestamp ts = _vm->_mixer->getElapsedTime(_audioStreamHandle);
if (ts.convertToFramerate(_vm->_soundRate).totalNumberOfFrames() < (int)soundEnergyItem->position) {
result = soundEnergyItem->energy;
break;
}
_vm->_soundEnergyIndex++;
}
if (_vm->_soundEnergyIndex >= _vm->_soundEnergyArray->size())
result = 0;
}
return result;
}
void VideoDecoder::setEndTime(const Audio::Timestamp &endTime) {
Audio::Timestamp startTime = 0;
if (isPlaying()) {
startTime = getTime();
stopAudio();
}
_endTime = endTime;
_endTimeSet = true;
if (startTime > endTime)
return;
if (isPlaying()) {
// We'll assume the audio track is going to start up at the same time it just was
// and therefore not do any seeking.
// Might want to set it anyway if we're seekable.
startAudioLimit(_endTime.msecs() - startTime.msecs());
_lastTimeChange = startTime;
}
}
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::seekToTime(const Audio::Timestamp &time) {
stopAudio();
_audioStartOffset = time;
// Sets all tracks to this time
for (uint32 i = 0; i < _handlers.size(); i++)
_handlers[i]->seekToTime(time);
startAudio();
// Reset our start time
_startTime = g_system->getMillis() - time.msecs();
_setStartTime = true;
resetPauseStartTime();
// Reset the next video track too
_nextVideoTrack = findNextVideoTrack();
_needUpdate = _nextVideoTrack != 0;
}
uint32 SoundManager::getVOCFrame() {
Audio::Timestamp timestamp = _mixer->getElapsedTime(_soundHandle);
return timestamp.secs();
}
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::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;
}
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());
}
