Skip to content

HTTPS clone URL

Subversion checkout URL

You can clone with
or
.
Download ZIP
Fetching contributors…

Cannot retrieve contributors at this time

549 lines (473 sloc) 12.543 kB
/* 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/debug.h"
#include "common/endian.h"
#include "common/system.h"
#include "common/stream.h"
#include "common/textconsole.h"
#include "graphics/surface.h"
#include "video/dxa_decoder.h"
#ifdef USE_ZLIB
#include "common/zlib.h"
#endif
namespace Video {
DXADecoder::DXADecoder() {
}
DXADecoder::~DXADecoder() {
close();
}
bool DXADecoder::loadStream(Common::SeekableReadStream *stream) {
close();
uint32 tag = stream->readUint32BE();
if (tag != MKTAG('D','E','X','A')) {
close();
return false;
}
DXAVideoTrack *track = new DXAVideoTrack(stream);
addTrack(track);
readSoundData(stream);
track->setFrameStartPos();
return true;
}
void DXADecoder::readSoundData(Common::SeekableReadStream *stream) {
// Skip over the tag by default
stream->readUint32BE();
}
DXADecoder::DXAVideoTrack::DXAVideoTrack(Common::SeekableReadStream *stream) {
_fileStream = stream;
_curFrame = -1;
_frameStartOffset = 0;
_decompBuffer = 0;
_inBuffer = 0;
memset(_palette, 0, 256 * 3);
uint8 flags = _fileStream->readByte();
_frameCount = _fileStream->readUint16BE();
int32 frameRate = _fileStream->readSint32BE();
if (frameRate > 0)
_frameRate = 1000 / frameRate;
else if (frameRate < 0)
_frameRate = 100000 / (-frameRate);
else
_frameRate = 10;
_width = _fileStream->readUint16BE();
_height = _fileStream->readUint16BE();
if (flags & 0x80) {
_scaleMode = S_INTERLACED;
_curHeight = _height / 2;
} else if (flags & 0x40) {
_scaleMode = S_DOUBLE;
_curHeight = _height / 2;
} else {
_scaleMode = S_NONE;
_curHeight = _height;
}
_surface = new Graphics::Surface();
_surface->format = Graphics::PixelFormat::createFormatCLUT8();
debug(2, "flags 0x0%x framesCount %d width %d height %d rate %d", flags, getFrameCount(), getWidth(), getHeight(), getFrameRate().toInt());
_frameSize = _width * _height;
_decompBufferSize = _frameSize;
_frameBuffer1 = new byte[_frameSize];
memset(_frameBuffer1, 0, _frameSize);
_frameBuffer2 = new byte[_frameSize];
memset(_frameBuffer2, 0, _frameSize);
_scaledBuffer = 0;
if (_scaleMode != S_NONE) {
_scaledBuffer = new byte[_frameSize];
memset(_scaledBuffer, 0, _frameSize);
}
#ifdef DXA_EXPERIMENT_MAXD
// Check for an extended header
if (flags & 1) {
uint32 size;
do {
tag = _fileStream->readUint32BE();
if (tag != 0)
size = _fileStream->readUint32BE();
switch (tag) {
case 0: // No more tags
break;
case MKTAG('M','A','X','D'):
assert(size == 4);
_decompBufferSize = _fileStream->readUint32BE();
break;
default: // Unknown tag - skip it.
while (size > 0) {
byte dummy = _fileStream->readByte();
size--;
}
break;
}
} while (tag != 0);
}
#endif
}
DXADecoder::DXAVideoTrack::~DXAVideoTrack() {
delete _fileStream;
delete _surface;
delete[] _frameBuffer1;
delete[] _frameBuffer2;
delete[] _scaledBuffer;
delete[] _inBuffer;
delete[] _decompBuffer;
}
bool DXADecoder::DXAVideoTrack::rewind() {
_curFrame = -1;
_fileStream->seek(_frameStartOffset);
return true;
}
Graphics::PixelFormat DXADecoder::DXAVideoTrack::getPixelFormat() const {
return _surface->format;
}
void DXADecoder::DXAVideoTrack::setFrameStartPos() {
_frameStartOffset = _fileStream->pos();
}
void DXADecoder::DXAVideoTrack::decodeZlib(byte *data, int size, int totalSize) {
#ifdef USE_ZLIB
unsigned long dstLen = totalSize;
Common::uncompress(data, &dstLen, _inBuffer, size);
#endif
}
#define BLOCKW 4
#define BLOCKH 4
void DXADecoder::DXAVideoTrack::decode12(int size) {
#ifdef USE_ZLIB
if (!_decompBuffer) {
_decompBuffer = new byte[_decompBufferSize];
memset(_decompBuffer, 0, _decompBufferSize);
}
/* decompress the input data */
decodeZlib(_decompBuffer, size, _decompBufferSize);
byte *dat = _decompBuffer;
memcpy(_frameBuffer2, _frameBuffer1, _frameSize);
for (uint32 by = 0; by < _height; by += BLOCKH) {
for (uint32 bx = 0; bx < _width; bx += BLOCKW) {
byte type = *dat++;
byte *b2 = _frameBuffer1 + bx + by * _width;
switch (type) {
case 0:
break;
case 10:
case 11:
case 12:
case 13:
case 14:
case 15:
case 1: {
unsigned short diffMap;
if (type >= 10 && type <= 15) {
static const struct { uint8 sh1, sh2; } shiftTbl[6] = {
{0, 0}, {8, 0}, {8, 8}, {8, 4}, {4, 0}, {4, 4}
};
diffMap = ((*dat & 0xF0) << shiftTbl[type-10].sh1) |
((*dat & 0x0F) << shiftTbl[type-10].sh2);
dat++;
} else {
diffMap = *(unsigned short*)dat;
dat += 2;
}
for (int yc = 0; yc < BLOCKH; yc++) {
for (int xc = 0; xc < BLOCKW; xc++) {
if (diffMap & 0x8000) {
b2[xc] = *dat++;
}
diffMap <<= 1;
}
b2 += _width;
}
break;
}
case 2: {
byte color = *dat++;
for (int yc = 0; yc < BLOCKH; yc++) {
for (int xc = 0; xc < BLOCKW; xc++) {
b2[xc] = color;
}
b2 += _width;
}
break;
}
case 3: {
for (int yc = 0; yc < BLOCKH; yc++) {
for (int xc = 0; xc < BLOCKW; xc++) {
b2[xc] = *dat++;
}
b2 += _width;
}
break;
}
case 4: {
byte mbyte = *dat++;
int mx = (mbyte >> 4) & 0x07;
if (mbyte & 0x80)
mx = -mx;
int my = mbyte & 0x07;
if (mbyte & 0x08)
my = -my;
byte *b1 = _frameBuffer2 + (bx+mx) + (by+my) * _width;
for (int yc = 0; yc < BLOCKH; yc++) {
memcpy(b2, b1, BLOCKW);
b1 += _width;
b2 += _width;
}
break;
}
case 5:
break;
default:
error("decode12: Unknown type %d", type);
}
}
}
#endif
}
void DXADecoder::DXAVideoTrack::decode13(int size) {
#ifdef USE_ZLIB
uint8 *codeBuf, *dataBuf, *motBuf, *maskBuf;
if (!_decompBuffer) {
_decompBuffer = new byte[_decompBufferSize];
memset(_decompBuffer, 0, _decompBufferSize);
}
/* decompress the input data */
decodeZlib(_decompBuffer, size, _decompBufferSize);
memcpy(_frameBuffer2, _frameBuffer1, _frameSize);
int codeSize = _width * _curHeight / 16;
int dataSize, motSize;
dataSize = READ_BE_UINT32(&_decompBuffer[0]);
motSize = READ_BE_UINT32(&_decompBuffer[4]);
//maskSize = READ_BE_UINT32(&_decompBuffer[8]);
codeBuf = &_decompBuffer[12];
dataBuf = &codeBuf[codeSize];
motBuf = &dataBuf[dataSize];
maskBuf = &motBuf[motSize];
for (uint32 by = 0; by < _curHeight; by += BLOCKH) {
for (uint32 bx = 0; bx < _width; bx += BLOCKW) {
uint8 type = *codeBuf++;
uint8 *b2 = (uint8 *)_frameBuffer1 + bx + by * _width;
switch (type) {
case 0:
break;
case 1: {
uint16 diffMap = READ_BE_UINT16(maskBuf);
maskBuf += 2;
for (int yc = 0; yc < BLOCKH; yc++) {
for (int xc = 0; xc < BLOCKW; xc++) {
if (diffMap & 0x8000) {
b2[xc] = *dataBuf++;
}
diffMap <<= 1;
}
b2 += _width;
}
break;
}
case 2: {
uint8 color = *dataBuf++;
for (int yc = 0; yc < BLOCKH; yc++) {
for (int xc = 0; xc < BLOCKW; xc++) {
b2[xc] = color;
}
b2 += _width;
}
break;
}
case 3: {
for (int yc = 0; yc < BLOCKH; yc++) {
for (int xc = 0; xc < BLOCKW; xc++) {
b2[xc] = *dataBuf++;
}
b2 += _width;
}
break;
}
case 4: {
uint8 mbyte = *motBuf++;
int mx = (mbyte >> 4) & 0x07;
if (mbyte & 0x80)
mx = -mx;
int my = mbyte & 0x07;
if (mbyte & 0x08)
my = -my;
uint8 *b1 = (uint8 *)_frameBuffer2 + (bx+mx) + (by+my) * _width;
for (int yc = 0; yc < BLOCKH; yc++) {
memcpy(b2, b1, BLOCKW);
b1 += _width;
b2 += _width;
}
break;
}
case 8: {
static const int subX[4] = {0, 2, 0, 2};
static const int subY[4] = {0, 0, 2, 2};
uint8 subMask = *maskBuf++;
for (int subBlock = 0; subBlock < 4; subBlock++) {
int sx = bx + subX[subBlock], sy = by + subY[subBlock];
b2 = (uint8 *)_frameBuffer1 + sx + sy * _width;
switch (subMask & 0xC0) {
// 00: skip
case 0x00:
break;
// 01: solid color
case 0x40: {
uint8 subColor = *dataBuf++;
for (int yc = 0; yc < BLOCKH / 2; yc++) {
for (int xc = 0; xc < BLOCKW / 2; xc++) {
b2[xc] = subColor;
}
b2 += _width;
}
break;
}
// 02: motion vector
case 0x80: {
uint8 mbyte = *motBuf++;
int mx = (mbyte >> 4) & 0x07;
if (mbyte & 0x80)
mx = -mx;
int my = mbyte & 0x07;
if (mbyte & 0x08)
my = -my;
uint8 *b1 = (uint8 *)_frameBuffer2 + (sx+mx) + (sy+my) * _width;
for (int yc = 0; yc < BLOCKH / 2; yc++) {
memcpy(b2, b1, BLOCKW / 2);
b1 += _width;
b2 += _width;
}
break;
}
// 03: raw
case 0xC0:
for (int yc = 0; yc < BLOCKH / 2; yc++) {
for (int xc = 0; xc < BLOCKW / 2; xc++) {
b2[xc] = *dataBuf++;
}
b2 += _width;
}
break;
}
subMask <<= 2;
}
break;
}
case 32:
case 33:
case 34: {
int count = type - 30;
uint8 pixels[4];
memcpy(pixels, dataBuf, count);
dataBuf += count;
if (count == 2) {
uint16 code = READ_BE_UINT16(maskBuf);
maskBuf += 2;
for (int yc = 0; yc < BLOCKH; yc++) {
for (int xc = 0; xc < BLOCKW; xc++) {
b2[xc] = pixels[code & 1];
code >>= 1;
}
b2 += _width;
}
} else {
uint32 code = READ_BE_UINT32(maskBuf);
maskBuf += 4;
for (int yc = 0; yc < BLOCKH; yc++) {
for (int xc = 0; xc < BLOCKW; xc++) {
b2[xc] = pixels[code & 3];
code >>= 2;
}
b2 += _width;
}
}
break;
}
default:
error("decode13: Unknown type %d", type);
}
}
}
#endif
}
const Graphics::Surface *DXADecoder::DXAVideoTrack::decodeNextFrame() {
uint32 tag = _fileStream->readUint32BE();
if (tag == MKTAG('C','M','A','P')) {
_fileStream->read(_palette, 256 * 3);
_dirtyPalette = true;
}
tag = _fileStream->readUint32BE();
if (tag == MKTAG('F','R','A','M')) {
byte type = _fileStream->readByte();
uint32 size = _fileStream->readUint32BE();
if (!_inBuffer || _inBufferSize < size) {
delete[] _inBuffer;
_inBuffer = new byte[size];
memset(_inBuffer, 0, size);
_inBufferSize = size;
}
_fileStream->read(_inBuffer, size);
switch (type) {
case 2:
decodeZlib(_frameBuffer1, size, _frameSize);
break;
case 3:
decodeZlib(_frameBuffer2, size, _frameSize);
break;
case 12:
decode12(size);
break;
case 13:
decode13(size);
break;
default:
error("decodeFrame: Unknown compression type %d", type);
}
if (type == 3) {
for (uint32 j = 0; j < _curHeight; ++j) {
for (uint32 i = 0; i < _width; ++i) {
const int offs = j * _width + i;
_frameBuffer1[offs] ^= _frameBuffer2[offs];
}
}
}
}
switch (_scaleMode) {
case S_INTERLACED:
for (int cy = 0; cy < _curHeight; cy++) {
memcpy(&_scaledBuffer[2 * cy * _width], &_frameBuffer1[cy * _width], _width);
memset(&_scaledBuffer[((2 * cy) + 1) * _width], 0, _width);
}
_surface->pixels = _scaledBuffer;
break;
case S_DOUBLE:
for (int cy = 0; cy < _curHeight; cy++) {
memcpy(&_scaledBuffer[2 * cy * _width], &_frameBuffer1[cy * _width], _width);
memcpy(&_scaledBuffer[((2 * cy) + 1) * _width], &_frameBuffer1[cy * _width], _width);
}
_surface->pixels = _scaledBuffer;
break;
case S_NONE:
_surface->pixels = _frameBuffer1;
break;
}
// Copy in the relevant info to the Surface
_surface->w = getWidth();
_surface->h = getHeight();
_surface->pitch = getWidth();
_curFrame++;
return _surface;
}
} // End of namespace Video
Jump to Line
Something went wrong with that request. Please try again.