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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 "graphics/surface.h"
#include "pink/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;
}
uint16 CelDecoder::getTransparentColourIndex() {
CelVideoTrack *track = (CelVideoTrack *)getTrack(0);
if (!track)
return 0;
return track->getTransparentColourIndex();
}
const Graphics::Surface *CelDecoder::getCurrentFrame() {
CelVideoTrack *track = (CelVideoTrack *)getTrack(0);
if (!track)
return 0;
return track->getCurrentFrame();
}
Common::Point CelDecoder::getCenter() {
CelVideoTrack *track = (CelVideoTrack *)getTrack(0);
if (!track)
return Common::Point(0, 0);
return track->getCenter();
}
void CelDecoder::skipFrame() {
CelVideoTrack *track = (CelVideoTrack *)getTrack(0);
track->skipFrame();
}
void CelDecoder::setEndOfTrack() {
CelVideoTrack *track = (CelVideoTrack *)getTrack(0);
track->setEndOfTrack();
}
CelDecoder::CelVideoTrack::CelVideoTrack(Common::SeekableReadStream *stream, uint16 frameCount, uint16 width, uint16 height, bool skipHeader)
: FlicVideoTrack(stream, frameCount, width, height, 1), _center(0, 0), _transparentColourIndex(0) {
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;
uint32 subchunkSize = _fileStream->readUint32LE();
uint16 subchunkType = _fileStream->readUint16LE();
switch (subchunkType) {
case CEL_DATA:
_fileStream->readUint16LE();
_center.x = _fileStream->readUint16LE();
_center.y = _fileStream->readUint16LE();
break;
default:
error("Unknown subchunk type");
_fileStream->skip(subchunkSize - 6);
break;
}
}
void CelDecoder::CelVideoTrack::readHeader() {
_fileStream->readUint16LE();
_frameDelay = _startFrameDelay = _fileStream->readUint32LE();
_fileStream->seek(80);
_offsetFrame1 = _fileStream->readUint32LE();
_offsetFrame2 = _fileStream->readUint32LE();
if (_offsetFrame1 > 0x80)
readPrefixChunk();
_fileStream->seek(_offsetFrame1);
}
uint16 CelDecoder::CelVideoTrack::getTransparentColourIndex() {
return _transparentColourIndex;
}
const Graphics::Surface *CelDecoder::CelVideoTrack::getCurrentFrame() {
return _surface;
}
Common::Point CelDecoder::CelVideoTrack::getCenter() {
return _center;
}
#define FRAME_TYPE 0xF1FA
void CelDecoder::CelVideoTrack::skipFrame() {
// Read chunk
/*uint32 frameSize = */ _fileStream->readUint32LE();
uint16 frameType = _fileStream->readUint16LE();
switch (frameType) {
case FRAME_TYPE:
handleFrame();
break;
default:
error("FlicDecoder::decodeFrame(): unknown main chunk type (type = 0x%02X)", frameType);
break;
}
_curFrame++;
//_nextFrameStartTime += _frameDelay;
if (_atRingFrame) {
// If we decoded the ring frame, seek to the second frame
_atRingFrame = false;
_fileStream->seek(_offsetFrame2);
}
if (_curFrame == 0)
_transparentColourIndex = *(byte *)_surface->getBasePtr(0, 0);
}
const Graphics::Surface *CelDecoder::CelVideoTrack::decodeNextFrame() {
// Read chunk
/*uint32 frameSize = */ _fileStream->readUint32LE();
uint16 frameType = _fileStream->readUint16LE();
switch (frameType) {
case FRAME_TYPE:
handleFrame();
break;
default:
error("FlicDecoder::decodeFrame(): unknown main chunk type (type = 0x%02X)", frameType);
break;
}
_curFrame++;
_nextFrameStartTime += _frameDelay;
if (_atRingFrame) {
// If we decoded the ring frame, seek to the second frame
_atRingFrame = false;
if (_frameCount == 1) {
_fileStream->seek(_offsetFrame1);
} else
_fileStream->seek(_offsetFrame2);
}
if (_curFrame == 0)
_transparentColourIndex = *(byte *)_surface->getBasePtr(0, 0);
return _surface;
}
bool CelDecoder::CelVideoTrack::rewind() {
// this method is overriden for 2 reasons:
// 1) bug in Flic rewind(curFrame)
// 2) I changed behaviour of endOfTrack
_nextFrameStartTime = 0;
if (_curFrame >= (int)_frameCount - 1 && _fileStream->pos() < _fileStream->size())
_atRingFrame = true;
else
_fileStream->seek(_offsetFrame1);
_curFrame = -1;
_frameDelay = _startFrameDelay;
return true;
}
} // End of namepsace Pink
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