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/* ScummVM - Scumm Interpreter
* Copyright (C) 2004-2006 The ScummVM project
*
* 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.
*
* $URL$
* $Id$
*
*/
#include "common/stdafx.h"
#include "kyra/kyra.h"
#include "kyra/screen.h"
#include "kyra/wsamovie.h"
namespace Kyra {
WSAMovieV1::WSAMovieV1(KyraEngine *vm) : Movie(vm) {}
WSAMovieV1::~WSAMovieV1() { close(); }
void WSAMovieV1::open(const char *filename, int offscreenDecode, uint8 *palBuf) {
debug(9, "WSAMovieV1::open('%s', %d, 0x%X)", filename, offscreenDecode, palBuf);
close();
uint32 flags = 0;
uint32 fileSize;
uint8 *p = _vm->resource()->fileData(filename, &fileSize);
if (!p)
return;
const uint8 *wsaData = p;
_numFrames = READ_LE_UINT16(wsaData); wsaData += 2;
_width = READ_LE_UINT16(wsaData); wsaData += 2;
_height = READ_LE_UINT16(wsaData); wsaData += 2;
_deltaBufferSize = READ_LE_UINT16(wsaData); wsaData += 2;
_offscreenBuffer = NULL;
_flags = 0;
if (_vm->features() & GF_TALKIE) {
flags = READ_LE_UINT16(wsaData); wsaData += 2;
}
uint32 offsPal = 0;
if (flags & 1) {
offsPal = 0x300;
_flags |= WF_HAS_PALETTE;
if (palBuf) {
memcpy(palBuf, wsaData + (_numFrames + 2) * 4, 0x300);
}
}
if (offscreenDecode) {
_flags |= WF_OFFSCREEN_DECODE;
const int offscreenBufferSize = _width * _height;
_offscreenBuffer = new uint8[offscreenBufferSize];
memset(_offscreenBuffer, 0, offscreenBufferSize);
}
if (_numFrames & 0x8000) {
warning("Unhandled wsa flags 0x80");
_flags |= 0x80;
_numFrames &= 0x7FFF;
}
_currentFrame = _numFrames;
_deltaBuffer = new uint8[_deltaBufferSize];
memset(_deltaBuffer, 0, _deltaBufferSize);
// read frame offsets
_frameOffsTable = new uint32[_numFrames + 2];
_frameOffsTable[0] = 0;
uint32 frameDataOffs = READ_LE_UINT32(wsaData); wsaData += 4;
bool firstFrame = true;
if (frameDataOffs == 0) {
firstFrame = false;
frameDataOffs = READ_LE_UINT32(wsaData);
_flags |= WF_NO_FIRST_FRAME;
}
for (int i = 1; i < _numFrames + 2; ++i) {
_frameOffsTable[i] = READ_LE_UINT32(wsaData) - frameDataOffs;
wsaData += 4;
}
// skip palette
wsaData += offsPal;
// read frame data
const int frameDataSize = p + fileSize - wsaData;
_frameData = new uint8[frameDataSize];
memcpy(_frameData, wsaData, frameDataSize);
// decode first frame
if (firstFrame) {
Screen::decodeFrame4(_frameData, _deltaBuffer, _deltaBufferSize);
}
delete [] p;
_opened = true;
}
void WSAMovieV1::close() {
debug(9, "WSAMovieV1::close()");
if (_opened) {
delete [] _deltaBuffer;
delete [] _offscreenBuffer;
delete [] _frameOffsTable;
delete [] _frameData;
_opened = false;
}
}
void WSAMovieV1::displayFrame(int frameNum) {
debug(9, "WSAMovieV1::displayFrame(%d)", frameNum);
if (frameNum >= _numFrames || !_opened)
return;
uint8 *dst;
if (_flags & WF_OFFSCREEN_DECODE) {
dst = _offscreenBuffer;
} else {
dst = _vm->screen()->getPagePtr(_drawPage) + _y * Screen::SCREEN_W + _x;
}
if (_currentFrame == _numFrames) {
if (!(_flags & WF_NO_FIRST_FRAME)) {
if (_flags & WF_OFFSCREEN_DECODE) {
Screen::decodeFrameDelta(dst, _deltaBuffer);
} else {
Screen::decodeFrameDeltaPage(dst, _deltaBuffer, _width, 1);
}
}
_currentFrame = 0;
}
// try to reduce the number of needed frame operations
int diffCount = ABS(_currentFrame - frameNum);
int frameStep = 1;
int frameCount;
if (_currentFrame < frameNum) {
frameCount = _numFrames - frameNum + _currentFrame;
if (diffCount > frameCount) {
frameStep = -1;
} else {
frameCount = diffCount;
}
} else {
frameCount = _numFrames - _currentFrame + frameNum;
if (frameCount >= diffCount) {
frameStep = -1;
frameCount = diffCount;
}
}
// process
if (frameStep > 0) {
uint16 cf = _currentFrame;
while (frameCount--) {
cf += frameStep;
processFrame(cf, dst);
if (cf == _numFrames) {
cf = 0;
}
}
} else {
uint16 cf = _currentFrame;
while (frameCount--) {
if (cf == 0) {
cf = _numFrames;
}
processFrame(cf, dst);
cf += frameStep;
}
}
// display
_currentFrame = frameNum;
if (_flags & WF_OFFSCREEN_DECODE) {
_vm->screen()->copyBlockToPage(_drawPage, _x, _y, _width, _height, _offscreenBuffer);
}
}
void WSAMovieV1::processFrame(int frameNum, uint8 *dst) {
debug(9, "WSAMovieV1::processFrame(%d, 0x%X)", frameNum, dst);
if (!_opened)
return;
assert(frameNum <= _numFrames);
const uint8 *src = _frameData + _frameOffsTable[frameNum];
Screen::decodeFrame4(src, _deltaBuffer, _deltaBufferSize);
if (_flags & WF_OFFSCREEN_DECODE) {
Screen::decodeFrameDelta(dst, _deltaBuffer);
} else {
Screen::decodeFrameDeltaPage(dst, _deltaBuffer, _width, 0);
}
}
} // end of namespace Kyra
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