const Graphics::Surface *QuickTimeDecoder::decodeNextFrame() {
if (_videoStreamIndex < 0 || _curFrame >= (int32)getFrameCount() - 1)
return 0;
if (_startTime == 0)
_startTime = g_system->getMillis();
_curFrame++;
_nextFrameStartTime += getFrameDuration();
// Update the audio while we're at it
updateAudioBuffer();
// Get the next packet
uint32 descId;
Common::SeekableReadStream *frameData = getNextFramePacket(descId);
if (!frameData || !descId || descId > _streams[_videoStreamIndex]->stsdEntryCount)
return 0;
// Find which video description entry we want
STSDEntry *entry = &_streams[_videoStreamIndex]->stsdEntries[descId - 1];
if (!entry->videoCodec)
return 0;
const Graphics::Surface *frame = entry->videoCodec->decodeImage(frameData);
delete frameData;
// Update the palette
if (entry->videoCodec->containsPalette()) {
// The codec itself contains a palette
if (entry->videoCodec->hasDirtyPalette()) {
_palette = entry->videoCodec->getPalette();
_dirtyPalette = true;
}
} else {
// Check if the video description has been updated
byte *palette = entry->palette;
if (palette != _palette) {
_palette = palette;
_dirtyPalette = true;
}
}
return scaleSurface(frame);
}
const Graphics::Surface *QuickTimeDecoder::VideoTrackHandler::bufferNextFrame() {
_curFrame++;
// Get the next packet
uint32 descId;
Common::SeekableReadStream *frameData = getNextFramePacket(descId);
if (!frameData || !descId || descId > _parent->sampleDescs.size()) {
delete frameData;
return 0;
}
// Find which video description entry we want
VideoSampleDesc *entry = (VideoSampleDesc *)_parent->sampleDescs[descId - 1];
if (!entry->_videoCodec) {
delete frameData;
return 0;
}
const Graphics::Surface *frame = entry->_videoCodec->decodeImage(frameData);
delete frameData;
// Update the palette
if (entry->_videoCodec->containsPalette()) {
// The codec itself contains a palette
if (entry->_videoCodec->hasDirtyPalette()) {
_curPalette = entry->_videoCodec->getPalette();
_dirtyPalette = true;
}
} else {
// Check if the video description has been updated
byte *palette = entry->_palette;
if (palette != _curPalette) {
_curPalette = palette;
_dirtyPalette = true;
}
}
return frame;
}
void QuickTimeDecoder::processData() {
if (_curFrame >= (int32)_tracks[_videoTrackIndex]->frameCount - 1) {
finish();
return;
}
if (getTimeToNextFrame() > 0)
return;
_curFrame++;
_nextFrameStartTime += getFrameDuration();
// Update the audio while we're at it
updateAudioBuffer();
// Get the next packet
uint32 descId;
Common::SeekableReadStream *frameData = getNextFramePacket(descId);
if (!frameData || !descId || descId > _tracks[_videoTrackIndex]->sampleDescs.size()) {
delete frameData;
return;
}
// Find which video description entry we want
VideoSampleDesc *entry = (VideoSampleDesc *)_tracks[_videoTrackIndex]->sampleDescs[descId - 1];
if (entry->_videoCodec) {
assert(_surface);
entry->_videoCodec->decodeFrame(*_surface, *frameData);
_needCopy = true;
}
delete frameData;
}