mirror of
https://github.com/libretro/scummvm.git
synced 2024-12-17 15:18:11 +00:00
563 lines
12 KiB
C++
563 lines
12 KiB
C++
/* ScummVM - Graphic Adventure Engine
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*
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* ScummVM is the legal property of its developers, whose names
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* are too numerous to list here. Please refer to the COPYRIGHT
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* file distributed with this source distribution.
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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/debug.h"
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#include "common/endian.h"
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#include "common/archive.h"
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#include "common/system.h"
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#include "common/stream.h"
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#include "common/util.h"
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#include "video/dxa_decoder.h"
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#ifdef USE_ZLIB
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#include "common/zlib.h"
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#endif
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namespace Video {
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DXADecoder::DXADecoder() {
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_fileStream = 0;
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_surface = 0;
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_dirtyPalette = false;
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_frameBuffer1 = 0;
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_frameBuffer2 = 0;
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_scaledBuffer = 0;
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_inBuffer = 0;
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_inBufferSize = 0;
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_decompBuffer = 0;
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_decompBufferSize = 0;
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_width = 0;
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_height = 0;
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_frameSize = 0;
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_frameCount = 0;
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_frameRate = 0;
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_scaleMode = S_NONE;
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}
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DXADecoder::~DXADecoder() {
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close();
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}
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bool DXADecoder::load(Common::SeekableReadStream *stream) {
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close();
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_fileStream = stream;
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uint32 tag = _fileStream->readUint32BE();
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assert(tag == MKID_BE('DEXA'));
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uint8 flags = _fileStream->readByte();
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_frameCount = _fileStream->readUint16BE();
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int32 frameRate = _fileStream->readSint32BE();
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if (frameRate > 0)
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_frameRate = 1000 / frameRate;
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else if (frameRate < 0)
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_frameRate = 100000 / (-frameRate);
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else
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_frameRate = 10;
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_width = _fileStream->readUint16BE();
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_height = _fileStream->readUint16BE();
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if (flags & 0x80) {
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_scaleMode = S_INTERLACED;
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_curHeight = _height / 2;
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} else if (flags & 0x40) {
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_scaleMode = S_DOUBLE;
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_curHeight = _height / 2;
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} else {
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_scaleMode = S_NONE;
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_curHeight = _height;
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}
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_surface = new Graphics::Surface();
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_surface->bytesPerPixel = 1;
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debug(2, "flags 0x0%x framesCount %d width %d height %d rate %d", flags, getFrameCount(), getWidth(), getHeight(), getFrameRate().toInt());
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_frameSize = _width * _height;
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_decompBufferSize = _frameSize;
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_frameBuffer1 = (uint8 *)malloc(_frameSize);
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memset(_frameBuffer1, 0, _frameSize);
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_frameBuffer2 = (uint8 *)malloc(_frameSize);
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memset(_frameBuffer2, 0, _frameSize);
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if (!_frameBuffer1 || !_frameBuffer2)
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error("DXADecoder: Error allocating frame buffers (size %u)", _frameSize);
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_scaledBuffer = 0;
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if (_scaleMode != S_NONE) {
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_scaledBuffer = (uint8 *)malloc(_frameSize);
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memset(_scaledBuffer, 0, _frameSize);
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if (!_scaledBuffer)
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error("Error allocating scale buffer (size %u)", _frameSize);
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}
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#ifdef DXA_EXPERIMENT_MAXD
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// Check for an extended header
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if (flags & 1) {
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uint32 size;
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do {
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tag = _fileStream->readUint32BE();
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if (tag != 0)
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size = _fileStream->readUint32BE();
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switch (tag) {
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case 0: // No more tags
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break;
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case MKID_BE('MAXD'):
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assert(size == 4);
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_decompBufferSize = _fileStream->readUint32BE();
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break;
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default: // Unknown tag - skip it.
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while (size > 0) {
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byte dummy = _fileStream->readByte();
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size--;
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}
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break;
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}
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} while (tag != 0);
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}
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#endif
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// Read the sound header
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_soundTag = _fileStream->readUint32BE();
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return true;
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}
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void DXADecoder::close() {
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if (!_fileStream)
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return;
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delete _fileStream;
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_fileStream = 0;
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delete _surface;
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_surface = 0;
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free(_frameBuffer1);
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free(_frameBuffer2);
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free(_scaledBuffer);
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free(_inBuffer);
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free(_decompBuffer);
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_inBuffer = 0;
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_decompBuffer = 0;
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reset();
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}
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void DXADecoder::decodeZlib(byte *data, int size, int totalSize) {
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#ifdef USE_ZLIB
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unsigned long dstLen = totalSize;
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Common::uncompress(data, &dstLen, _inBuffer, size);
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#endif
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}
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#define BLOCKW 4
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#define BLOCKH 4
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void DXADecoder::decode12(int size) {
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#ifdef USE_ZLIB
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if (_decompBuffer == NULL) {
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_decompBuffer = (byte *)malloc(_decompBufferSize);
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memset(_decompBuffer, 0, _decompBufferSize);
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if (_decompBuffer == NULL)
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error("Error allocating decomp buffer (size %u)", _decompBufferSize);
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}
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/* decompress the input data */
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decodeZlib(_decompBuffer, size, _decompBufferSize);
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byte *dat = _decompBuffer;
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memcpy(_frameBuffer2, _frameBuffer1, _frameSize);
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for (uint32 by = 0; by < _height; by += BLOCKH) {
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for (uint32 bx = 0; bx < _width; bx += BLOCKW) {
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byte type = *dat++;
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byte *b2 = _frameBuffer1 + bx + by * _width;
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switch (type) {
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case 0:
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break;
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case 10:
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case 11:
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case 12:
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case 13:
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case 14:
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case 15:
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case 1: {
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unsigned short diffMap;
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if (type >= 10 && type <= 15) {
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static const struct { uint8 sh1, sh2; } shiftTbl[6] = {
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{0, 0}, {8, 0}, {8, 8}, {8, 4}, {4, 0}, {4, 4}
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};
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diffMap = ((*dat & 0xF0) << shiftTbl[type-10].sh1) |
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((*dat & 0x0F) << shiftTbl[type-10].sh2);
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dat++;
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} else {
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diffMap = *(unsigned short*)dat;
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dat += 2;
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}
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for (int yc = 0; yc < BLOCKH; yc++) {
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for (int xc = 0; xc < BLOCKW; xc++) {
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if (diffMap & 0x8000) {
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b2[xc] = *dat++;
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}
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diffMap <<= 1;
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}
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b2 += _width;
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}
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break;
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}
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case 2: {
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byte color = *dat++;
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for (int yc = 0; yc < BLOCKH; yc++) {
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for (int xc = 0; xc < BLOCKW; xc++) {
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b2[xc] = color;
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}
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b2 += _width;
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}
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break;
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}
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case 3: {
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for (int yc = 0; yc < BLOCKH; yc++) {
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for (int xc = 0; xc < BLOCKW; xc++) {
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b2[xc] = *dat++;
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}
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b2 += _width;
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}
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break;
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}
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case 4: {
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byte mbyte = *dat++;
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int mx = (mbyte >> 4) & 0x07;
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if (mbyte & 0x80)
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mx = -mx;
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int my = mbyte & 0x07;
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if (mbyte & 0x08)
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my = -my;
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byte *b1 = _frameBuffer2 + (bx+mx) + (by+my) * _width;
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for (int yc = 0; yc < BLOCKH; yc++) {
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memcpy(b2, b1, BLOCKW);
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b1 += _width;
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b2 += _width;
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}
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break;
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}
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case 5:
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break;
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default:
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error("decode12: Unknown type %d", type);
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}
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}
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}
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#endif
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}
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void DXADecoder::decode13(int size) {
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#ifdef USE_ZLIB
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uint8 *codeBuf, *dataBuf, *motBuf, *maskBuf;
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if (_decompBuffer == NULL) {
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_decompBuffer = (byte *)malloc(_decompBufferSize);
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memset(_decompBuffer, 0, _decompBufferSize);
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if (_decompBuffer == NULL)
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error("Error allocating decomp buffer (size %u)", _decompBufferSize);
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}
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/* decompress the input data */
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decodeZlib(_decompBuffer, size, _decompBufferSize);
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memcpy(_frameBuffer2, _frameBuffer1, _frameSize);
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int codeSize = _width * _curHeight / 16;
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int dataSize, motSize, maskSize;
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dataSize = READ_BE_UINT32(&_decompBuffer[0]);
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motSize = READ_BE_UINT32(&_decompBuffer[4]);
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maskSize = READ_BE_UINT32(&_decompBuffer[8]);
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codeBuf = &_decompBuffer[12];
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dataBuf = &codeBuf[codeSize];
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motBuf = &dataBuf[dataSize];
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maskBuf = &motBuf[motSize];
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for (uint32 by = 0; by < _curHeight; by += BLOCKH) {
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for (uint32 bx = 0; bx < _width; bx += BLOCKW) {
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uint8 type = *codeBuf++;
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uint8 *b2 = (uint8*)_frameBuffer1 + bx + by * _width;
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switch (type) {
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case 0:
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break;
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case 1: {
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uint16 diffMap = READ_BE_UINT16(maskBuf);
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maskBuf += 2;
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for (int yc = 0; yc < BLOCKH; yc++) {
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for (int xc = 0; xc < BLOCKW; xc++) {
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if (diffMap & 0x8000) {
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b2[xc] = *dataBuf++;
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}
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diffMap <<= 1;
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}
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b2 += _width;
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}
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break;
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}
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case 2: {
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uint8 color = *dataBuf++;
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for (int yc = 0; yc < BLOCKH; yc++) {
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for (int xc = 0; xc < BLOCKW; xc++) {
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b2[xc] = color;
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}
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b2 += _width;
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}
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break;
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}
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case 3: {
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for (int yc = 0; yc < BLOCKH; yc++) {
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for (int xc = 0; xc < BLOCKW; xc++) {
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b2[xc] = *dataBuf++;
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}
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b2 += _width;
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}
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break;
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}
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case 4: {
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uint8 mbyte = *motBuf++;
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int mx = (mbyte >> 4) & 0x07;
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if (mbyte & 0x80)
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mx = -mx;
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int my = mbyte & 0x07;
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if (mbyte & 0x08)
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my = -my;
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uint8 *b1 = (uint8*)_frameBuffer2 + (bx+mx) + (by+my) * _width;
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for (int yc = 0; yc < BLOCKH; yc++) {
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memcpy(b2, b1, BLOCKW);
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b1 += _width;
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b2 += _width;
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}
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break;
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}
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case 8: {
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static const int subX[4] = {0, 2, 0, 2};
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static const int subY[4] = {0, 0, 2, 2};
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uint8 subMask = *maskBuf++;
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for (int subBlock = 0; subBlock < 4; subBlock++) {
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int sx = bx + subX[subBlock], sy = by + subY[subBlock];
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b2 = (uint8*)_frameBuffer1 + sx + sy * _width;
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switch (subMask & 0xC0) {
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// 00: skip
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case 0x00:
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break;
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// 01: solid color
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case 0x40: {
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uint8 subColor = *dataBuf++;
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for (int yc = 0; yc < BLOCKH / 2; yc++) {
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for (int xc = 0; xc < BLOCKW / 2; xc++) {
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b2[xc] = subColor;
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}
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b2 += _width;
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}
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break;
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}
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// 02: motion vector
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case 0x80: {
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uint8 mbyte = *motBuf++;
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int mx = (mbyte >> 4) & 0x07;
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if (mbyte & 0x80)
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mx = -mx;
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int my = mbyte & 0x07;
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if (mbyte & 0x08)
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my = -my;
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uint8 *b1 = (uint8*)_frameBuffer2 + (sx+mx) + (sy+my) * _width;
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for (int yc = 0; yc < BLOCKH / 2; yc++) {
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memcpy(b2, b1, BLOCKW / 2);
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b1 += _width;
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b2 += _width;
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}
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break;
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}
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// 03: raw
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case 0xC0:
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for (int yc = 0; yc < BLOCKH / 2; yc++) {
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for (int xc = 0; xc < BLOCKW / 2; xc++) {
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b2[xc] = *dataBuf++;
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}
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b2 += _width;
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}
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break;
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}
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subMask <<= 2;
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}
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break;
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}
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case 32:
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case 33:
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case 34: {
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int count = type - 30;
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uint8 pixels[4];
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memcpy(pixels, dataBuf, count);
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dataBuf += count;
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if (count == 2) {
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uint16 code = READ_BE_UINT16(maskBuf);
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maskBuf += 2;
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for (int yc = 0; yc < BLOCKH; yc++) {
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for (int xc = 0; xc < BLOCKW; xc++) {
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b2[xc] = pixels[code & 1];
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code >>= 1;
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}
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b2 += _width;
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}
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} else {
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uint32 code = READ_BE_UINT32(maskBuf);
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maskBuf += 4;
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for (int yc = 0; yc < BLOCKH; yc++) {
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for (int xc = 0; xc < BLOCKW; xc++) {
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b2[xc] = pixels[code & 3];
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code >>= 2;
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}
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b2 += _width;
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}
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}
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break;
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}
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default:
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error("decode13: Unknown type %d", type);
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}
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}
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}
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#endif
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}
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const Graphics::Surface *DXADecoder::decodeNextFrame() {
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uint32 tag = _fileStream->readUint32BE();
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if (tag == MKID_BE('CMAP')) {
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_fileStream->read(_palette, 256 * 3);
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_dirtyPalette = true;
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}
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tag = _fileStream->readUint32BE();
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if (tag == MKID_BE('FRAM')) {
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byte type = _fileStream->readByte();
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uint32 size = _fileStream->readUint32BE();
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if ((_inBuffer == NULL) || (_inBufferSize < size)) {
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free(_inBuffer);
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_inBuffer = (byte *)malloc(size);
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memset(_inBuffer, 0, size);
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if (_inBuffer == NULL)
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error("Error allocating input buffer (size %u)", size);
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_inBufferSize = size;
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}
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_fileStream->read(_inBuffer, size);
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switch (type) {
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case 2:
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decodeZlib(_frameBuffer1, size, _frameSize);
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break;
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case 3:
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decodeZlib(_frameBuffer2, size, _frameSize);
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break;
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case 12:
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decode12(size);
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break;
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case 13:
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decode13(size);
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break;
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default:
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error("decodeFrame: Unknown compression type %d", type);
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}
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if (type == 3) {
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for (uint32 j = 0; j < _curHeight; ++j) {
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for (uint32 i = 0; i < _width; ++i) {
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const int offs = j * _width + i;
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_frameBuffer1[offs] ^= _frameBuffer2[offs];
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}
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}
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}
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}
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switch (_scaleMode) {
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case S_INTERLACED:
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for (int cy = 0; cy < _curHeight; cy++) {
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memcpy(&_scaledBuffer[2 * cy * _width], &_frameBuffer1[cy * _width], _width);
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memset(&_scaledBuffer[((2 * cy) + 1) * _width], 0, _width);
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}
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_surface->pixels = _scaledBuffer;
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break;
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case S_DOUBLE:
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for (int cy = 0; cy < _curHeight; cy++) {
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memcpy(&_scaledBuffer[2 * cy * _width], &_frameBuffer1[cy * _width], _width);
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memcpy(&_scaledBuffer[((2 * cy) + 1) * _width], &_frameBuffer1[cy * _width], _width);
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}
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_surface->pixels = _scaledBuffer;
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break;
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case S_NONE:
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_surface->pixels = _frameBuffer1;
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break;
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}
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// Copy in the relevant info to the Surface
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_surface->w = getWidth();
|
|
_surface->h = getHeight();
|
|
_surface->pitch = getWidth();
|
|
|
|
_curFrame++;
|
|
|
|
if (_curFrame == 0)
|
|
_startTime = g_system->getMillis();
|
|
|
|
return _surface;
|
|
}
|
|
|
|
} // End of namespace Video
|