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-rw-r--r--engines/gob/coktelvideo.cpp935
1 files changed, 935 insertions, 0 deletions
diff --git a/engines/gob/coktelvideo.cpp b/engines/gob/coktelvideo.cpp
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index 0000000000..8f17810430
--- /dev/null
+++ b/engines/gob/coktelvideo.cpp
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+/* 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/stdafx.h"
+#include "common/endian.h"
+#include "common/system.h"
+
+#include "gob/coktelvideo.h"
+
+namespace Gob {
+
+Imd::Imd() {
+ clear(false);
+}
+
+Imd::~Imd() {
+ clear();
+}
+
+bool Imd::load(Common::SeekableReadStream &stream) {
+ unload();
+
+ _stream = &stream;
+
+ // Version
+ uint16 handle = _stream->readUint16LE();
+ _version = _stream->readByte();
+
+ // Version checking
+ if ((handle != 0) || (_version < 2)) {
+ warning("IMD Version incorrect (%d,%X)", handle, _version);
+ unload();
+ return false;
+ }
+
+ // Rest header
+ _features = _stream->readByte();
+ _framesCount = _stream->readUint16LE();
+ _x = _stream->readUint16LE();
+ _y = _stream->readUint16LE();
+ _width = _stream->readUint16LE();
+ _height = _stream->readUint16LE();
+ _flags = _stream->readUint16LE();
+ _firstFramePos = _stream->readUint16LE();
+
+ // Palette
+ _stream->read((byte *) _palette, 768);
+
+ // Standard coordinates
+ if (_version >= 3) {
+ _stdX = _stream->readUint16LE();
+ if (_stdX > 1) {
+ warning("IMD: More than one standard coordinate quad found (%d)", _stdX);
+ unload();
+ return false;
+ }
+ if (_stdX != 0) {
+ _stdX = _stream->readUint16LE();
+ _stdY = _stream->readUint16LE();
+ _stdWidth = _stream->readUint16LE();
+ _stdHeight = _stream->readUint16LE();
+ _features |= kFeaturesStdCoords;
+ } else
+ _stdX = -1;
+ } else
+ _stdX = -1;
+
+ // Offset to frame positions table
+ uint32 framesPosPos = 0;
+ if (_version >= 4) {
+ framesPosPos = _stream->readUint32LE();
+ if (framesPosPos != 0) {
+ _framesPos = new int32[_framesCount];
+ assert(_framesPos);
+ _features |= kFeaturesFramesPos;
+ }
+ }
+
+ // Offset to frame coordinates
+ uint32 framesCoordsPos = 0;
+ if (_features & kFeaturesFrameCoords)
+ framesCoordsPos = _stream->readUint32LE();
+
+ // Sound
+ if (_features & kFeaturesSound) {
+ _soundFreq = _stream->readUint16LE();
+ _soundSliceSize = _stream->readUint16LE();
+ _soundSlicesCount = _stream->readUint16LE();
+
+ if (_soundFreq < 0)
+ _soundFreq = -_soundFreq;
+
+ if (_soundSlicesCount < 0)
+ _soundSlicesCount = -_soundSlicesCount - 1;
+
+ if (_soundSlicesCount > 40) {
+ warning("IMD: More than 40 sound slices found (%d)", _soundSlicesCount);
+ unload();
+ return false;
+ }
+
+ _soundSliceLength = 1000 / (_soundFreq / _soundSliceSize);
+ _frameLength = _soundSliceLength;
+
+ _soundStage = 1;
+ _hasSound = true;
+
+ _audioStream = Audio::makeAppendableAudioStream(_soundFreq, 0);
+ } else
+ _frameLength = 1000 / 12; // 12 FPS for a video without sound
+
+ // Sizes of the frame data and extra video buffer
+ if (_features & kFeaturesDataSize) {
+ _frameDataSize = _stream->readUint16LE();
+ if (_frameDataSize == 0) {
+ _frameDataSize = _stream->readUint32LE();
+ _vidBufferSize = _stream->readUint32LE();
+ } else
+ _vidBufferSize = _stream->readUint16LE();
+ } else {
+ _frameDataSize = _width * _height + 500;
+ if (!(_flags & 0x100) || (_flags & 0x1000))
+ _vidBufferSize = _frameDataSize;
+ }
+
+ // Frame positions table
+ if (_framesPos) {
+ _stream->seek(framesPosPos, SEEK_SET);
+ for (int i = 0; i < _framesCount; i++)
+ _framesPos[i] = _stream->readUint32LE();
+ }
+
+ // Frame coordinates table
+ if (_features & kFeaturesFrameCoords) {
+ _stream->seek(framesCoordsPos, SEEK_SET);
+ _frameCoords = new Coord[_framesCount];
+ assert(_frameCoords);
+ for (int i = 0; i < _framesCount; i++) {
+ _frameCoords[i].left = _stream->readUint16LE();
+ _frameCoords[i].top = _stream->readUint16LE();
+ _frameCoords[i].right = _stream->readUint16LE();
+ _frameCoords[i].bottom = _stream->readUint16LE();
+ }
+ }
+
+ // Seek to the first frame
+ _stream->seek(_firstFramePos, SEEK_SET);
+
+ // Allocating working memory
+ _frameData = new byte[_frameDataSize + 500];
+ assert(_frameData);
+ memset(_frameData, 0, _frameDataSize + 500);
+ _vidBuffer = new byte[_vidBufferSize + 500];
+ assert(_vidBuffer);
+ memset(_vidBuffer, 0, _vidBufferSize + 500);
+
+ return true;
+}
+
+void Imd::unload() {
+ clear();
+}
+
+void Imd::setXY(int16 x, int16 y) {
+ // Adjusting the standard coordinates
+ if (_stdX != -1) {
+ if (x != -1)
+ _stdX = _stdX - _x + x;
+ if (y != -1)
+ _stdY = _stdY - _y + y;
+ }
+
+ // Going through the coordinate table as well
+ if (_frameCoords) {
+ for (int i = 0; i < _framesCount; i++) {
+ if (_frameCoords[i].left != -1) {
+ if (x != -1) {
+ _frameCoords[i].left = _frameCoords[i].left - _x + x;
+ _frameCoords[i].right = _frameCoords[i].right - _x + x;
+ }
+ if (y != -1) {
+ _frameCoords[i].top = _frameCoords[i].top - _y + y;
+ _frameCoords[i].bottom = _frameCoords[i].bottom - _y + y;
+ }
+ }
+ }
+ }
+
+ if (x != -1)
+ _x = x;
+ if (y != -1)
+ _y = y;
+}
+
+void Imd::setVideoMemory(byte *vidMem, uint16 width, uint16 height) {
+ deleteVidMem();
+
+ _hasOwnVidMem = false;
+ _vidMem = vidMem;
+ _vidMemWidth = width;
+ _vidMemHeight = height;
+}
+
+void Imd::setVideoMemory() {
+ deleteVidMem();
+
+ if ((_width > 0) && (_height > 0)) {
+ setXY(0, 0);
+ _hasOwnVidMem = true;
+ _vidMem = new byte[_width * _height];
+ _vidMemWidth = _width;
+ _vidMemHeight = _height;
+ }
+}
+
+void Imd::enableSound(Audio::Mixer &mixer) {
+ // Only possible on the first frame
+ if (_curFrame > 0)
+ return;
+
+ _mixer = &mixer;
+ _soundEnabled = true;
+}
+
+void Imd::disableSound() {
+ if (_audioStream) {
+
+ if (_soundStage == 2) {
+ _audioStream->finish();
+ _mixer->stopHandle(_audioHandle);
+ } else
+ delete _audioStream;
+
+ _audioStream = 0;
+ }
+ _soundEnabled = false;
+ _mixer = 0;
+}
+
+void Imd::seekFrame(int16 frame, int16 whence, bool restart) {
+ if (!_stream)
+ // Nothing to do
+ return;
+
+ // Find the frame to which to seek
+ if (whence == SEEK_CUR)
+ frame += _curFrame;
+ else if (whence == SEEK_END)
+ frame = _framesCount - frame - 1;
+ else if (whence != SEEK_SET)
+ return;
+
+ if ((frame >= _framesCount) || (frame == _curFrame))
+ // Nothing to do
+ return;
+
+ // Try every possible way to find a file offset to that frame
+ uint32 framePos = 0;
+ if (frame == 0) {
+ framePos = _firstFramePos;
+ } else if (frame == 1) {
+ framePos = _firstFramePos;
+ _stream->seek(framePos, SEEK_SET);
+ framePos += _stream->readUint16LE() + 4;
+ } else if (_framesPos) {
+ framePos = _framesPos[frame];
+ } else if (restart && (_soundStage == 0)) {
+ for (int i = ((frame > _curFrame) ? _curFrame : 0); i <= frame; i++)
+ processFrame(i);
+ } else
+ error("Frame %d is not directly accessible", frame);
+
+ // Seek
+ _stream->seek(framePos, SEEK_SET);
+ _curFrame = frame;
+}
+
+CoktelVideo::State Imd::nextFrame() {
+ return processFrame(_curFrame);
+}
+
+void Imd::waitEndFrame() {
+ if (_soundEnabled && _hasSound) {
+ if (_soundStage != 2)
+ return;
+
+ if (_skipFrames == 0) {
+ int32 waitTime = (_curFrame * _soundSliceLength) -
+ (g_system->getMillis() - _soundStartTime);
+
+ if (waitTime < 0) {
+ _skipFrames = -waitTime / _soundSliceLength;
+ warning("IMD A/V sync broken, skipping %d frame(s)", _skipFrames + 1);
+ } else if (waitTime > 0)
+ g_system->delayMillis(waitTime);
+
+ } else
+ _skipFrames--;
+ } else
+ g_system->delayMillis(_frameLength);
+}
+
+void Imd::copyCurrentFrame(byte *dest, uint16 x, uint16 y, uint16 width, int16 transp) {
+ if (!_vidMem)
+ return;
+
+ dest += width * y;
+
+ uint16 copyWidth = MIN<int16>(width - x, _width);
+ uint16 destPitch = width - x;
+ byte *vidMem = _vidMem;
+
+ if (transp < 0) {
+ // No transparency
+ if ((x > 0) || (_width != width)) {
+ // Copy row-by-row
+ for (int i = 0; i < _height; i++) {
+ dest += x;
+ memcpy(dest, vidMem, copyWidth);
+ dest += destPitch;
+ vidMem += _width;
+ }
+
+ } else
+ // Dimensions fit, copy everything at once
+ memcpy(dest, _vidMem, _width * _height);
+
+ return;
+ }
+
+ // Transparency, copy per pixel
+ for (int i = 0; i < _height; i++) {
+ byte *s = vidMem;
+ byte *d = dest;
+
+ d += x;
+ for (int j = 0; j < _width; j++) {
+ if (*s != transp)
+ *d = *s;
+
+ s++;
+ d++;
+ }
+
+ dest += width;;
+ vidMem += _width;
+ }
+}
+
+void Imd::deleteVidMem(bool del) {
+ if (del) {
+ if (_hasOwnVidMem)
+ delete[] _vidMem;
+ }
+
+ _hasOwnVidMem = false;
+ _vidMem = 0;
+ _vidMemWidth = _vidMemHeight = 0;
+}
+
+void Imd::clear(bool del) {
+ if (del) {
+ delete[] _framesPos;
+ delete[] _frameCoords;
+ delete[] _frameData;
+ delete[] _vidBuffer;
+
+ disableSound();
+ }
+
+ _stream = 0;
+
+ _version = 0;
+ _features = 0;
+ _flags = 0;
+ _x = _y = _width = _height = 0;
+ _stdX = _stdY = _stdWidth = _stdHeight = 0;
+ _framesCount = _curFrame = 0;
+ _framesPos = 0;
+ _firstFramePos = 0;
+ _frameCoords = 0;
+
+ _frameDataSize = _vidBufferSize = 0;
+ _frameData = _vidBuffer = 0;
+
+ memset(_palette, 0, 768);
+
+ deleteVidMem(del);
+
+ _hasSound = false;
+ _soundEnabled = false;
+ _soundStage = 0;
+ _soundStartTime = 0;
+ _skipFrames = 0;
+
+ _soundFreq = 0;
+ _soundSliceSize = 0;
+ _soundSlicesCount = 0;
+ _soundSliceLength = 0;
+
+ _audioStream = 0;
+
+ _frameLength = 0;
+ _lastFrameTime = 0;
+}
+
+CoktelVideo::State Imd::processFrame(int16 frame) {
+ State state;
+ uint32 cmd = 0;
+ int16 xBak, yBak, heightBak, widthBak;
+ bool hasNextCmd = false;
+ bool startSound = false;
+
+ if (!_stream || (frame >= _framesCount)) {
+ state.flags = kStateBreak;
+ return state;
+ }
+
+ if (frame != _curFrame) {
+ state.flags |= kStateSeeked;
+ seekFrame(frame, SEEK_SET);
+ }
+
+ state.left = xBak = _x;
+ state.top = yBak = _y;
+ state.bottom = heightBak = _height;
+ state.right = widthBak = _width;
+ state.right += state.left - 1;
+ state.bottom += state.top - 1;
+
+/* if ((frame == 0) && (_features & 0x8))
+ _vm->_video->setPalette(_palette);*/
+
+ do {
+ if (frame != 0) {
+ if (_stdX != -1) {
+ state.left = _x = _stdX;
+ state.top = _y = _stdY;
+ state.right = _width = _stdWidth;
+ state.bottom = _height = _stdHeight;
+ state.right += state.left - 1;
+ state.bottom += state.top - 1;
+ state.flags |= kStateStdCoords;
+ }
+ if (_frameCoords &&
+ (_frameCoords[frame].left != -1)) {
+ state.left = _x = _frameCoords[frame].left;
+ state.top = _y = _frameCoords[frame].top;
+ state.right = _width =
+ _frameCoords[frame].right - _x + 1;
+ state.bottom = _height =
+ _frameCoords[frame].bottom - _y + 1;
+ state.right += state.left - 1;
+ state.bottom += state.top - 1;
+ state.flags |= kStateFrameCoords;
+ }
+ }
+
+ cmd = _stream->readUint16LE();
+
+ if ((cmd & 0xFFF8) == 0xFFF0) {
+ if (cmd == 0xFFF0) {
+ _stream->seek(2, SEEK_CUR);
+ cmd = _stream->readUint16LE();
+ }
+
+ if (cmd == 0xFFF1) {
+ state.flags = kStateBreak;
+ continue;
+ } else if (cmd == 0xFFF2) { // Skip (16 bit)
+ cmd = _stream->readUint16LE();
+ _stream->seek(cmd, SEEK_CUR);
+ state.flags = kStateBreak;
+ continue;
+ } else if (cmd == 0xFFF3) { // Skip (32 bit)
+ cmd = _stream->readUint32LE();
+ _stream->seek(cmd, SEEK_CUR);
+ state.flags = kStateBreak;
+ continue;
+ }
+ }
+
+ if (_soundStage != 0) {
+ byte *soundBuf;
+
+/* if (!hasNextCmd)
+ waitEndSoundSlice();*/
+
+ // Next sound slice data
+ if (cmd == 0xFF00) {
+
+ if (!hasNextCmd && _soundEnabled) {
+ soundBuf = new byte[_soundSliceSize];
+ assert(soundBuf);
+
+ _stream->read(soundBuf, _soundSliceSize);
+ unsignedToSigned(soundBuf, _soundSliceSize);
+ _audioStream->queueBuffer(soundBuf, _soundSliceSize);
+ } else
+ _stream->seek(_soundSliceSize, SEEK_CUR);
+
+ cmd = _stream->readUint16LE();
+
+ // Initial sound data (all slices)
+ } else if (cmd == 0xFF01) {
+ int dataLength = _soundSliceSize * _soundSlicesCount;
+
+ if (!hasNextCmd && _soundEnabled) {
+ soundBuf = new byte[dataLength];
+ assert(soundBuf);
+
+ _stream->read(soundBuf, dataLength);
+ unsignedToSigned(soundBuf, dataLength);
+
+ _soundStage = 1;
+ startSound = true;
+ _audioStream->queueBuffer(soundBuf, dataLength);
+ } else
+ _stream->seek(dataLength, SEEK_CUR);
+
+ cmd = _stream->readUint16LE();
+
+ // Empty sound slice
+ } else if (!hasNextCmd && (_soundEnabled)) {
+ soundBuf = new byte[_soundSliceSize];
+ assert(soundBuf);
+
+ memset(soundBuf, 0, _soundSliceSize);
+ _audioStream->queueBuffer(soundBuf, _soundSliceSize);
+ }
+ }
+
+ // Set palette
+ if (cmd == 0xFFF4) {
+ _stream->seek(2, SEEK_CUR);
+ state.flags |= kStatePalette;
+ _stream->read(_palette, 768);
+ cmd = _stream->readUint16LE();
+ }
+
+ hasNextCmd = false;
+
+ // Jump to frame
+ if (cmd == 0xFFFD) {
+
+ frame = _stream->readUint16LE();
+ if (_framesPos) {
+ _curFrame = frame;
+ _stream->seek(_framesPos[frame], SEEK_SET);
+
+ hasNextCmd = true;
+ state.flags |= kStateJump;
+ }
+
+ } else if (cmd == 0xFFFC) {
+
+ state.flags |= 1;
+ cmd = _stream->readUint32LE();
+ _stream->read(_frameData, cmd + 2);
+
+ int16 left = _x;
+ int16 top = _y;
+ int16 right = _width + left;
+ int16 bottom = _height + top;
+
+ if (!_vidMem)
+ setVideoMemory();
+
+ if (_vidMemWidth < right) {
+ left = 0;
+ right = _width;
+ }
+ if (_vidMemWidth < right)
+ right = _vidMemWidth;
+ if (_vidMemHeight < bottom) {
+ top = 0;
+ bottom = _height;
+ }
+ if (_vidMemHeight < bottom)
+ bottom = _vidMemHeight;
+
+ _x = left;
+ _y = top;
+ _height = bottom - top;
+ _width = right - left;
+
+ renderFrame();
+
+ state.flags |= _frameData[0];
+
+ // Frame video data
+ } else if (cmd != 0) {
+
+ _stream->read(_frameData, cmd + 2);
+
+ renderFrame();
+
+ state.flags |= _frameData[0];
+
+ } else
+ state.flags |= kStateNoData;
+
+ } while (hasNextCmd);
+
+ if (startSound && _soundEnabled) {
+ _mixer->playInputStream(Audio::Mixer::kSFXSoundType, &_audioHandle, _audioStream);
+ _soundStartTime = g_system->getMillis();
+ _skipFrames = 0;
+ _soundStage = 2;
+ }
+
+ _x = xBak;
+ _y = yBak;
+ _width = widthBak;
+ _height = heightBak;
+
+ _curFrame++;
+ if ((_curFrame == _framesCount) && (_soundStage == 2)) {
+ _audioStream->finish();
+ _mixer->stopHandle(_audioHandle);
+ _audioStream = 0;
+ _soundStage = 0;
+ }
+
+ _lastFrameTime = g_system->getMillis();
+ return state;
+}
+
+CoktelVideo::State Imd::peekFrame(int16 frame) {
+ State state;
+ uint32 posBak;
+ uint32 tmp;
+ uint16 cmd;
+ int16 frameBak;
+
+ if (!_stream) {
+ state.flags = kStateBreak;
+ return state;
+ }
+
+ posBak = _stream->pos();
+ frameBak = _curFrame;
+
+ if (_curFrame != frame) {
+ state.flags |= kStateSeeked;
+ seekFrame(frame, SEEK_SET);
+ }
+
+ do {
+ if (frame != 0) {
+ if (_stdX != -1)
+ state.flags |= kStateStdCoords;
+ if (_frameCoords && (_frameCoords[frame].left != -1))
+ state.flags |= kStateFrameCoords;
+ }
+
+ cmd = _stream->readUint16LE();
+
+ if ((cmd & 0xFFF8) == 0xFFF0) {
+ if (cmd == 0xFFF0) {
+ _stream->seek(2, SEEK_CUR);
+ cmd = _stream->readUint16LE();
+ }
+
+ if (cmd == 0xFFF1) {
+ state.flags = kStateBreak;
+ continue;
+ } else if (cmd == 0xFFF2) { // Skip (16 bit)
+ cmd = _stream->readUint16LE();
+ _stream->seek(cmd, SEEK_CUR);
+ state.flags = kStateBreak;
+ continue;
+ } else if (cmd == 0xFFF3) { // Skip (32 bit)
+ tmp = _stream->readUint32LE();
+ _stream->seek(cmd, SEEK_CUR);
+ state.flags = kStateBreak;
+ continue;
+ }
+ }
+
+ // Jump to frame
+ if (cmd == 0xFFFD) {
+ frame = _stream->readUint16LE();
+ if (_framesPos) {
+ _stream->seek(_framesPos[frame], SEEK_SET);
+ state.flags |= kStateJump;
+ continue;
+ }
+ break;
+ }
+
+ // Next sound slice data
+ if (cmd == 0xFF00) {
+ _stream->seek(_soundSliceSize, SEEK_CUR);
+ cmd = _stream->readUint16LE();
+ // Initial sound data (all slices)
+ } else if (cmd == 0xFF01) {
+ _stream->seek(_soundSliceSize * _soundSlicesCount, SEEK_CUR);
+ cmd = _stream->readUint16LE();
+ }
+
+ // Frame video data
+ if (cmd != 0) {
+ _stream->read(_frameData, 5);
+ state.flags |= _frameData[0];
+ } else
+ state.flags |= kStateNoData;
+
+ break;
+
+ } while (true);
+
+ _stream->seek(posBak, SEEK_SET);
+ _curFrame = frameBak;
+ return state;
+}
+
+void Imd::renderFrame() {
+ if (!_frameData || (_width <= 0) || (_height <= 0))
+ return;
+
+ if (!_vidMem)
+ setVideoMemory();
+
+ byte *dataPtr = _frameData;
+ int16 imdX = _x;
+ int16 imdY = _y;
+ int16 imdW = _width;
+ int16 imdH = _height;
+ int16 sW = _vidMemWidth;
+ byte *imdVidMem = _vidMem + sW * imdY + imdX;
+ uint8 type = *dataPtr++;
+ byte *srcPtr = dataPtr;
+
+
+ if (type & 0x10) { // Palette data
+ type ^= 0x10;
+ dataPtr += 49;
+ }
+
+ srcPtr = dataPtr;
+ if (type & 0x80) { // Frame data is compressed
+ srcPtr = _vidBuffer;
+ type &= 0x7F;
+ if ((type == 2) && (imdW == sW)) {
+ frameUncompressor(imdVidMem, dataPtr);
+ return;
+ } else
+ frameUncompressor(srcPtr, dataPtr);
+ }
+
+ uint16 pixCount, pixWritten;
+ byte *imdVidMemBak;
+
+ if (type == 2) { // Whole block
+ for (int i = 0; i < imdH; i++) {
+ memcpy(imdVidMem, srcPtr, imdW);
+ srcPtr += imdW;
+ imdVidMem += sW;
+ }
+ } else if (type == 1) { // Sparse block
+ imdVidMemBak = imdVidMem;
+ for (int i = 0; i < imdH; i++) {
+ pixWritten = 0;
+ while (pixWritten < imdW) {
+ pixCount = *srcPtr++;
+ if (pixCount & 0x80) { // data
+ pixCount = MIN((pixCount & 0x7F) + 1, imdW - pixWritten);
+ memcpy(imdVidMem, srcPtr, pixCount);
+
+ pixWritten += pixCount;
+ imdVidMem += pixCount;
+ srcPtr += pixCount;
+ } else { // "hole"
+ pixCount = (pixCount + 1) % 256;
+ pixWritten += pixCount;
+ imdVidMem += pixCount;
+ }
+ }
+ imdVidMemBak += sW;
+ imdVidMem = imdVidMemBak;
+ }
+ } else if (type == 0x42) { // Whole quarter-wide block
+ for (int i = 0; i < imdH; i++) {
+ imdVidMemBak = imdVidMem;
+
+ for (int j = 0; j < imdW; j += 4, imdVidMem += 4, srcPtr++)
+ memset(imdVidMem, *srcPtr, 4);
+
+ imdVidMemBak += sW;
+ imdVidMem = imdVidMemBak;
+ }
+ } else if ((type & 0xF) == 2) { // Whole half-high block
+ for (; imdH > 1; imdH -= 2, imdVidMem += sW + sW, srcPtr += imdW) {
+ memcpy(imdVidMem, srcPtr, imdW);
+ memcpy(imdVidMem + sW, srcPtr, imdW);
+ }
+ if (imdH == -1)
+ memcpy(imdVidMem, srcPtr, imdW);
+ } else { // Sparse half-high block
+ imdVidMemBak = imdVidMem;
+ for (int i = 0; i < imdH; i += 2) {
+ pixWritten = 0;
+ while (pixWritten < imdW) {
+ pixCount = *srcPtr++;
+ if (pixCount & 0x80) { // data
+ pixCount = MIN((pixCount & 0x7F) + 1, imdW - pixWritten);
+ memcpy(imdVidMem, srcPtr, pixCount);
+ memcpy(imdVidMem + sW, srcPtr, pixCount);
+
+ pixWritten += pixCount;
+ imdVidMem += pixCount;
+ srcPtr += pixCount;
+ } else { // "hole"
+ pixCount = (pixCount + 1) % 256;
+ pixWritten += pixCount;
+ imdVidMem += pixCount;
+ }
+ }
+ imdVidMemBak += sW + sW;
+ imdVidMem = imdVidMemBak;
+ }
+ }
+}
+
+void Imd::frameUncompressor(byte *dest, byte *src) {
+ int i;
+ byte buf[4370];
+ uint16 chunkLength;
+ uint16 frameLength;
+ uint16 bufPos1;
+ uint16 bufPos2;
+ uint16 tmp;
+ uint8 chunkBitField;
+ uint8 chunkCount;
+ bool mode;
+
+ frameLength = READ_LE_UINT16(src);
+ src += 4;
+
+ if ((READ_LE_UINT16(src) == 0x1234) && (READ_LE_UINT16(src + 2) == 0x5678)) {
+ src += 4;
+ bufPos1 = 273;
+ mode = 1; // 123Ch (cmp al, 12h)
+ } else {
+ bufPos1 = 4078;
+ mode = 0; // 275h (jnz +2)
+ }
+
+ memset(buf, 32, bufPos1);
+ chunkCount = 1;
+ chunkBitField = 0;
+
+ while (frameLength > 0) {
+ chunkCount--;
+ if (chunkCount == 0) {
+ tmp = *src++;
+ chunkCount = 8;
+ chunkBitField = tmp;
+ }
+ if (chunkBitField % 2) {
+ chunkBitField >>= 1;
+ buf[bufPos1] = *src;
+ *dest++ = *src++;
+ bufPos1 = (bufPos1 + 1) % 4096;
+ frameLength--;
+ continue;
+ }
+ chunkBitField >>= 1;
+
+ tmp = READ_LE_UINT16(src);
+ src += 2;
+ chunkLength = ((tmp & 0xF00) >> 8) + 3;
+
+ if ((mode && ((chunkLength & 0xFF) == 0x12)) ||
+ (!mode && (chunkLength == 0)))
+ chunkLength = *src++ + 0x12;
+
+ bufPos2 = (tmp & 0xFF) + ((tmp >> 4) & 0x0F00);
+ if (((tmp + chunkLength) >= 4096) ||
+ ((chunkLength + bufPos1) >= 4096)) {
+
+ for (i = 0; i < chunkLength; i++, dest++) {
+ *dest = buf[bufPos2];
+ buf[bufPos1] = buf[bufPos2];
+ bufPos1 = (bufPos1 + 1) % 4096;
+ bufPos2 = (bufPos2 + 1) % 4096;
+ }
+
+ } else if (((tmp + chunkLength) < bufPos1) ||
+ ((chunkLength + bufPos1) < bufPos2)) {
+
+ memcpy(dest, buf + bufPos2, chunkLength);
+ memmove(buf + bufPos1, buf + bufPos2, chunkLength);
+
+ dest += chunkLength;
+ bufPos1 += chunkLength;
+ bufPos2 += chunkLength;
+
+ } else {
+
+ for (i = 0; i < chunkLength; i++, dest++, bufPos1++, bufPos2++) {
+ *dest = buf[bufPos2];
+ buf[bufPos1] = buf[bufPos2];
+ }
+
+ }
+ frameLength -= chunkLength;
+
+ }
+}
+
+} // End of namespace Gob
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