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/* ScummVM - Graphic Adventure Engine
*
* ScummVM is the legal property of its developers, whose names
* are too numerous to list here. Please refer to the COPYRIGHT
* file distributed with this source distribution.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
*/
#include <common/stream.h>
#include "cel_decoder.h"
namespace Pink {
bool CelDecoder::loadStream(Common::SeekableReadStream *stream) {
close();
/* uint32 frameSize = */ stream->readUint32LE();
uint16 frameType = stream->readUint16LE();
// Check FLC magic number
if (frameType != 0xAF12) {
warning("FlicDecoder::loadStream(): attempted to load non-FLC data (type = 0x%04X)", frameType);
return false;
}
uint16 frameCount = stream->readUint16LE();
uint16 width = stream->readUint16LE();
uint16 height = stream->readUint16LE();
uint16 colorDepth = stream->readUint16LE();
if (colorDepth != 8) {
warning("FlicDecoder::loadStream(): attempted to load an FLC with a palette of color depth %d. Only 8-bit color palettes are supported", colorDepth);
return false;
}
addTrack(new CelVideoTrack(stream, frameCount, width, height));
return true;
}
uint32 CelDecoder::getX(){
CelVideoTrack *track = (CelVideoTrack*) getTrack(0);
if (!track)
return -1;
return track->getX();
}
uint32 CelDecoder::getY() {
CelVideoTrack *track = (CelVideoTrack*) getTrack(0);
if (!track)
return -1;
return track->getY();
}
CelDecoder::CelVideoTrack::CelVideoTrack(Common::SeekableReadStream *stream, uint16 frameCount, uint16 width, uint16 height, bool skipHeader)
: FlicVideoTrack(stream, frameCount, width, height, 1) {
readHeader();
}
#define PREFIX_TYPE 0xF100
#define CEL_DATA 3
void CelDecoder::CelVideoTrack::readPrefixChunk() {
_fileStream->seek(0x80);
uint32 chunkSize = _fileStream->readUint32LE();
uint16 chunkType = _fileStream->readUint16LE();
if (chunkType != PREFIX_TYPE)
return;
uint32 offset = 6;
while (offset < chunkSize) {
uint32 subchunkSize = _fileStream->readUint32LE();
uint16 subchunkType = _fileStream->readUint16LE();
switch (subchunkType) {
case CEL_DATA:
_fileStream->skip(2); // Unknown field
_center.x = _fileStream->readUint16LE();
_center.y = _fileStream->readUint16LE();
_fileStream->skip(subchunkSize - 6 - 6);
break;
default:
_fileStream->skip(subchunkSize - 6);
break;
}
offset += subchunkSize;
}
}
void CelDecoder::CelVideoTrack::readHeader() {
_fileStream->readUint16LE(); // flags
// Note: The normal delay is a 32-bit integer (dword), whereas the overridden delay is a 16-bit integer (word)
// the frame delay is the FLIC "speed", in milliseconds.
_frameDelay = _startFrameDelay = _fileStream->readUint32LE();
_fileStream->seek(80);
_offsetFrame1 = _fileStream->readUint32LE();
_offsetFrame2 = _fileStream->readUint32LE();
if (_offsetFrame1 > 0x80) {
readPrefixChunk();
}
// Seek to the first frame
_fileStream->seek(_offsetFrame1);
}
uint32 CelDecoder::CelVideoTrack::getX() const {
return _center.x - getWidth() / 2;
}
uint32 CelDecoder::CelVideoTrack::getY() const {
return _center.y - getHeight() / 2;
}
} // End of namepsace Pink
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