mirror of
https://github.com/libretro/scummvm.git
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293 lines
7.6 KiB
C++
293 lines
7.6 KiB
C++
/* ScummVM - Scumm Interpreter
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* Copyright (C) 2004-2006 The ScummVM project
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*
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* $URL$
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* $Id$
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*
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*/
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#include "common/stdafx.h"
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#include "common/endian.h"
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#include "common/system.h"
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#include "kyra/kyra.h"
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#include "kyra/kyra3.h"
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#include "kyra/screen.h"
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#include "kyra/wsamovie.h"
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namespace Kyra {
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WSAMovieV1::WSAMovieV1(KyraEngine *vm) : Movie(vm) {}
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WSAMovieV1::~WSAMovieV1() { close(); }
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int WSAMovieV1::open(const char *filename, int offscreenDecode, uint8 *palBuf) {
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debugC(9, kDebugLevelMovie, "WSAMovieV1::open('%s', %d, %p)", filename, offscreenDecode, (const void *)palBuf);
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close();
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uint32 flags = 0;
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uint32 fileSize;
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uint8 *p = _vm->resource()->fileData(filename, &fileSize);
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if (!p)
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return 0;
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const uint8 *wsaData = p;
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_numFrames = READ_LE_UINT16(wsaData); wsaData += 2;
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_width = READ_LE_UINT16(wsaData); wsaData += 2;
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_height = READ_LE_UINT16(wsaData); wsaData += 2;
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_deltaBufferSize = READ_LE_UINT16(wsaData); wsaData += 2;
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_offscreenBuffer = NULL;
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_flags = 0;
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if (_vm->gameFlags().isTalkie) {
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flags = READ_LE_UINT16(wsaData); wsaData += 2;
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}
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uint32 offsPal = 0;
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if (flags & 1) {
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offsPal = 0x300;
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_flags |= WF_HAS_PALETTE;
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if (palBuf) {
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memcpy(palBuf, wsaData + (_numFrames + 2) * 4, 0x300);
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}
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}
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if (offscreenDecode) {
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_flags |= WF_OFFSCREEN_DECODE;
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const int offscreenBufferSize = _width * _height;
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_offscreenBuffer = new uint8[offscreenBufferSize];
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memset(_offscreenBuffer, 0, offscreenBufferSize);
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}
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if (_numFrames & 0x8000) {
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warning("Unhandled wsa flags 0x80");
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_flags |= 0x80;
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_numFrames &= 0x7FFF;
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}
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_currentFrame = _numFrames;
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_deltaBuffer = new uint8[_deltaBufferSize];
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memset(_deltaBuffer, 0, _deltaBufferSize);
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// read frame offsets
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_frameOffsTable = new uint32[_numFrames + 2];
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_frameOffsTable[0] = 0;
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uint32 frameDataOffs = READ_LE_UINT32(wsaData); wsaData += 4;
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bool firstFrame = true;
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if (frameDataOffs == 0) {
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firstFrame = false;
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frameDataOffs = READ_LE_UINT32(wsaData);
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_flags |= WF_NO_FIRST_FRAME;
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}
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for (int i = 1; i < _numFrames + 2; ++i) {
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_frameOffsTable[i] = READ_LE_UINT32(wsaData) - frameDataOffs;
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wsaData += 4;
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}
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// skip palette
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wsaData += offsPal;
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// read frame data
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const int frameDataSize = p + fileSize - wsaData;
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_frameData = new uint8[frameDataSize];
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memcpy(_frameData, wsaData, frameDataSize);
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// decode first frame
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if (firstFrame) {
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Screen::decodeFrame4(_frameData, _deltaBuffer, _deltaBufferSize);
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}
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delete [] p;
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_opened = true;
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return _numFrames;
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}
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void WSAMovieV1::close() {
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debugC(9, kDebugLevelMovie, "WSAMovieV1::close()");
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if (_opened) {
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delete [] _deltaBuffer;
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delete [] _offscreenBuffer;
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delete [] _frameOffsTable;
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delete [] _frameData;
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_opened = false;
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}
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}
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void WSAMovieV1::displayFrame(int frameNum) {
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debugC(9, kDebugLevelMovie, "WSAMovieV1::displayFrame(%d)", frameNum);
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if (frameNum >= _numFrames || !_opened)
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return;
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uint8 *dst;
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if (_flags & WF_OFFSCREEN_DECODE) {
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dst = _offscreenBuffer;
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} else {
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dst = _vm->screen()->getPageRect(_drawPage, _x, _y, _width, _height);
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}
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if (_currentFrame == _numFrames) {
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if (!(_flags & WF_NO_FIRST_FRAME)) {
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if (_flags & WF_OFFSCREEN_DECODE) {
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Screen::decodeFrameDelta(dst, _deltaBuffer);
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} else {
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Screen::decodeFrameDeltaPage(dst, _deltaBuffer, _width, 1);
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}
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}
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_currentFrame = 0;
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}
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// try to reduce the number of needed frame operations
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int diffCount = ABS(_currentFrame - frameNum);
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int frameStep = 1;
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int frameCount;
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if (_currentFrame < frameNum) {
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frameCount = _numFrames - frameNum + _currentFrame;
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if (diffCount > frameCount) {
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frameStep = -1;
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} else {
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frameCount = diffCount;
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}
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} else {
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frameCount = _numFrames - _currentFrame + frameNum;
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if (frameCount >= diffCount) {
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frameStep = -1;
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frameCount = diffCount;
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}
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}
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// process
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if (frameStep > 0) {
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uint16 cf = _currentFrame;
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while (frameCount--) {
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cf += frameStep;
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processFrame(cf, dst);
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if (cf == _numFrames) {
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cf = 0;
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}
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}
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} else {
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uint16 cf = _currentFrame;
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while (frameCount--) {
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if (cf == 0) {
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cf = _numFrames;
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}
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processFrame(cf, dst);
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cf += frameStep;
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}
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}
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// display
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_currentFrame = frameNum;
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if (_flags & WF_OFFSCREEN_DECODE) {
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_vm->screen()->copyBlockToPage(_drawPage, _x, _y, _width, _height, _offscreenBuffer);
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}
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}
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void WSAMovieV1::processFrame(int frameNum, uint8 *dst) {
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debugC(9, kDebugLevelMovie, "WSAMovieV1::processFrame(%d, %p)", frameNum, (const void *)dst);
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if (!_opened)
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return;
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assert(frameNum <= _numFrames);
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const uint8 *src = _frameData + _frameOffsTable[frameNum];
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Screen::decodeFrame4(src, _deltaBuffer, _deltaBufferSize);
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if (_flags & WF_OFFSCREEN_DECODE) {
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Screen::decodeFrameDelta(dst, _deltaBuffer);
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} else {
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Screen::decodeFrameDeltaPage(dst, _deltaBuffer, _width, 0);
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}
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}
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#pragma mark -
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WSAMovieV2::WSAMovieV2(KyraEngine *vm) : WSAMovieV1(vm), _xAdd(0), _yAdd(0) {}
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int WSAMovieV2::open(const char *filename, int unk1, uint8 *palBuf) {
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debugC(9, kDebugLevelMovie, "WSAMovieV3::open('%s', %d, %p)", filename, unk1, (const void *)palBuf);
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close();
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uint32 flags = 0;
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uint32 fileSize;
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uint8 *p = _vm->resource()->fileData(filename, &fileSize);
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if (!p) {
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warning("couldn't load wsa file: '%s'", filename);
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return 0;
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}
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const uint8 *wsaData = p;
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_numFrames = READ_LE_UINT16(wsaData); wsaData += 2;
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_xAdd = (int16)(READ_LE_UINT16(wsaData)); wsaData += 2;
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_yAdd = (int16)(READ_LE_UINT16(wsaData)); wsaData += 2;
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_width = READ_LE_UINT16(wsaData); wsaData += 2;
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_height = READ_LE_UINT16(wsaData); wsaData += 2;
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_deltaBufferSize = READ_LE_UINT16(wsaData); wsaData += 2;
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_offscreenBuffer = NULL;
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_flags = 0;
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flags = READ_LE_UINT16(wsaData); wsaData += 2;
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uint32 offsPal = 0;
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if (flags & 1) {
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offsPal = 0x300;
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_flags |= WF_HAS_PALETTE;
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if (palBuf) {
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memcpy(palBuf, wsaData + 8 + ((_numFrames << 2) & 0xFFFF), 0x300);
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}
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}
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if (!(unk1 & 2)) {
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_flags |= WF_OFFSCREEN_DECODE;
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const int offscreenBufferSize = _width * _height;
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_offscreenBuffer = new uint8[offscreenBufferSize];
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memset(_offscreenBuffer, 0, offscreenBufferSize);
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}
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if (_numFrames & 0x8000) {
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warning("Unhandled wsa flags 0x80");
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_flags |= 0x80;
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_numFrames &= 0x7FFF;
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}
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_currentFrame = _numFrames;
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_deltaBuffer = new uint8[_deltaBufferSize];
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memset(_deltaBuffer, 0, _deltaBufferSize);
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// read frame offsets
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_frameOffsTable = new uint32[_numFrames + 2];
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_frameOffsTable[0] = 0;
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uint32 frameDataOffs = READ_LE_UINT32(wsaData); wsaData += 4;
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for (int i = 1; i < _numFrames + 2; ++i) {
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_frameOffsTable[i] = READ_LE_UINT32(wsaData) - frameDataOffs;
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wsaData += 4;
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}
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// skip palette
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wsaData += offsPal;
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// read frame data
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const int frameDataSize = p + fileSize - wsaData;
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_frameData = new uint8[frameDataSize];
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memcpy(_frameData, wsaData, frameDataSize);
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// decode first frame
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Screen::decodeFrame4(_frameData, _deltaBuffer, _deltaBufferSize);
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delete [] p;
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_opened = true;
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return _numFrames;
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}
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} // end of namespace Kyra
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