mirror of
https://github.com/libretro/scummvm.git
synced 2024-12-24 02:36:27 +00:00
994408a770
svn-id: r45391
242 lines
5.9 KiB
C++
242 lines
5.9 KiB
C++
/* 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.
|
|
*
|
|
* $URL$
|
|
* $Id$
|
|
*
|
|
*/
|
|
|
|
#include "common/debug.h"
|
|
#include "common/endian.h"
|
|
#include "common/archive.h"
|
|
#include "common/system.h"
|
|
#include "common/util.h"
|
|
|
|
#include "graphics/surface.h"
|
|
|
|
#include "sci/seq_decoder.h"
|
|
|
|
namespace Sci {
|
|
|
|
enum seqPalTypes {
|
|
kSeqPalVariable = 0,
|
|
kSeqPalConstant = 1
|
|
};
|
|
|
|
enum seqFrameTypes {
|
|
kSeqFrameFull = 0,
|
|
kSeqFrameDiff = 1
|
|
};
|
|
|
|
SeqDecoder::~SeqDecoder() {
|
|
closeFile();
|
|
}
|
|
|
|
bool SeqDecoder::loadFile(const char *fileName, int frameDelay) {
|
|
closeFile();
|
|
|
|
_fileStream = SearchMan.createReadStreamForMember(fileName);
|
|
if (!_fileStream)
|
|
return false;
|
|
|
|
// Seek to the first frame
|
|
_videoInfo.currentFrame = 0;
|
|
|
|
_videoInfo.width = 320;
|
|
_videoInfo.height = 200;
|
|
_videoInfo.frameCount = _fileStream->readUint16LE();
|
|
// Our frameDelay is calculated in 1/100 ms, so we convert it here
|
|
_videoInfo.frameDelay = 100 * frameDelay * 1000 / 60;
|
|
_videoFrameBuffer = new byte[_videoInfo.width * _videoInfo.height];
|
|
|
|
// Set palette
|
|
int paletteSize = _fileStream->readUint32LE();
|
|
|
|
byte *paletteData = new byte[paletteSize];
|
|
_fileStream->read(paletteData, paletteSize);
|
|
|
|
// SCI1.1 palette
|
|
byte palFormat = paletteData[32];
|
|
uint16 palColorStart = READ_LE_UINT16(paletteData + 25);
|
|
uint16 palColorCount = READ_LE_UINT16(paletteData + 29);
|
|
|
|
byte palette[256 * 4];
|
|
int palOffset = 37;
|
|
|
|
for (uint16 colorNo = palColorStart; colorNo < palColorStart + palColorCount; colorNo++) {
|
|
if (palFormat == kSeqPalVariable)
|
|
palOffset++;
|
|
palette[colorNo * 4 + 0] = paletteData[palOffset++];
|
|
palette[colorNo * 4 + 1] = paletteData[palOffset++];
|
|
palette[colorNo * 4 + 2] = paletteData[palOffset++];
|
|
palette[colorNo * 4 + 3] = 0;
|
|
}
|
|
|
|
g_system->setPalette(palette, 0, 256);
|
|
|
|
delete[] paletteData;
|
|
|
|
_videoInfo.firstframeOffset = _fileStream->pos();
|
|
|
|
return true;
|
|
}
|
|
|
|
void SeqDecoder::closeFile() {
|
|
if (!_fileStream)
|
|
return;
|
|
|
|
delete _fileStream;
|
|
_fileStream = 0;
|
|
|
|
delete[] _videoFrameBuffer;
|
|
_videoFrameBuffer = 0;
|
|
}
|
|
|
|
bool SeqDecoder::decodeNextFrame() {
|
|
int16 frameWidth = _fileStream->readUint16LE();
|
|
int16 frameHeight = _fileStream->readUint16LE();
|
|
int16 frameLeft = _fileStream->readUint16LE();
|
|
int16 frameTop = _fileStream->readUint16LE();
|
|
byte colorKey = _fileStream->readByte();
|
|
byte frameType = _fileStream->readByte();
|
|
_fileStream->skip(2);
|
|
uint16 frameSize = _fileStream->readUint16LE();
|
|
_fileStream->skip(2);
|
|
uint16 rleSize = _fileStream->readUint16LE();
|
|
_fileStream->skip(6);
|
|
uint32 offset = _fileStream->readUint32LE();
|
|
|
|
_fileStream->seek(offset);
|
|
|
|
if (_videoInfo.currentFrame == 0)
|
|
_videoInfo.startTime = g_system->getMillis();
|
|
|
|
if (frameType == kSeqFrameFull) {
|
|
byte *dst = _videoFrameBuffer + frameTop * 320 + frameLeft;
|
|
|
|
byte *linebuf = new byte[frameWidth];
|
|
|
|
do {
|
|
_fileStream->read(linebuf, frameWidth);
|
|
memcpy(dst, linebuf, frameWidth);
|
|
dst += 320;
|
|
} while (--frameHeight);
|
|
|
|
delete[] linebuf;
|
|
} else {
|
|
byte *buf = new byte[frameSize];
|
|
_fileStream->read(buf, frameSize);
|
|
decodeFrame(buf, rleSize, buf + rleSize, frameSize - rleSize, _videoFrameBuffer + 320 * frameTop, frameLeft, frameWidth, frameHeight, colorKey);
|
|
delete[] buf;
|
|
}
|
|
|
|
return ++_videoInfo.currentFrame < _videoInfo.frameCount;
|
|
}
|
|
|
|
#define WRITE_TO_BUFFER(n) \
|
|
if (writeRow * 320 + writeCol + (n) > 320 * height) { \
|
|
warning("SEQ player: writing out of bounds, aborting"); \
|
|
return false; \
|
|
} \
|
|
if (litPos + (n) > litSize) { \
|
|
warning("SEQ player: reading out of bounds, aborting"); \
|
|
} \
|
|
memcpy(dest + writeRow * 320 + writeCol, litData + litPos, n);
|
|
|
|
bool SeqDecoder::decodeFrame(byte *rleData, int rleSize, byte *litData, int litSize, byte *dest, int left, int width, int height, int colorKey) {
|
|
int writeRow = 0;
|
|
int writeCol = left;
|
|
int litPos = 0;
|
|
int rlePos = 0;
|
|
|
|
while (rlePos < rleSize) {
|
|
int op = rleData[rlePos++];
|
|
|
|
if ((op & 0xc0) == 0xc0) {
|
|
op &= 0x3f;
|
|
if (op == 0) {
|
|
// Go to next line in target buffer
|
|
writeRow++;
|
|
writeCol = left;
|
|
} else {
|
|
// Skip bytes on current line
|
|
writeCol += op;
|
|
}
|
|
} else if (op & 0x80) {
|
|
op &= 0x3f;
|
|
if (op == 0) {
|
|
// Copy remainder of current line
|
|
int rem = width - (writeCol - left);
|
|
|
|
WRITE_TO_BUFFER(rem);
|
|
writeRow++;
|
|
writeCol = left;
|
|
litPos += rem;
|
|
} else {
|
|
// Copy bytes
|
|
WRITE_TO_BUFFER(op);
|
|
writeCol += op;
|
|
litPos += op;
|
|
}
|
|
} else {
|
|
uint16 count = ((op & 7) << 8) | rleData[rlePos++];
|
|
|
|
switch (op >> 3) {
|
|
case 2:
|
|
// Skip bytes
|
|
writeCol += count;
|
|
break;
|
|
case 3:
|
|
// Copy bytes
|
|
WRITE_TO_BUFFER(count);
|
|
writeCol += count;
|
|
litPos += count;
|
|
break;
|
|
case 6: {
|
|
// Copy rows
|
|
if (count == 0)
|
|
count = height - writeRow;
|
|
|
|
for (int i = 0; i < count; i++) {
|
|
WRITE_TO_BUFFER(width);
|
|
litPos += width;
|
|
writeRow++;
|
|
}
|
|
break;
|
|
}
|
|
case 7:
|
|
// Skip rows
|
|
if (count == 0)
|
|
count = height - writeRow;
|
|
|
|
writeRow += count;
|
|
break;
|
|
default:
|
|
warning("Unsupported operation %i encountered", op >> 3);
|
|
return false;
|
|
}
|
|
}
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
} // End of namespace Sci
|