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coktelvideo.cpp

/* 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: https://scummvm.svn.sourceforge.net/svnroot/scummvm/scummvm/tags/release-0-11-1/engines/gob/coktelvideo.cpp $
 * $Id: coktelvideo.cpp 30944 2008-02-23 22:50:18Z sev $
 *
 */

#include "common/endian.h"
#include "common/system.h"

#include "gob/coktelvideo.h"

namespace Gob {

Imd::Imd() {
      clear(false);
}

Imd::~Imd() {
      clear();
}

00041 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->readSint16LE();
      _y = _stream->readSint16LE();
      _width = _stream->readSint16LE();
      _height = _stream->readSint16LE();
      _flags = _stream->readUint16LE();
      _firstFramePos = _stream->readUint16LE();

      // IMDs always have video
      _features |= kFeaturesVideo;

      // 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->readSint16LE();
                  _stdY = _stream->readSint16LE();
                  _stdWidth = _stream->readSint16LE();
                  _stdHeight = _stream->readSint16LE();
                  _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 uint32[_framesCount];
                  assert(_framesPos);
                  _features |= kFeaturesFramesPos;
            }
      }

      // Offset to frame coordinates
      uint32 framesCoordsPos = 0;
      if (_features & kFeaturesFrameCoords)
            framesCoordsPos = _stream->readUint32LE();

      // Sound
      if (_features & kFeaturesSound) {
            _soundFreq = _stream->readSint16LE();
            _soundSliceSize = _stream->readSint16LE();
            _soundSlicesCount = _stream->readSint16LE();

            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->readSint16LE();
                  _frameCoords[i].top = _stream->readSint16LE();
                  _frameCoords[i].right = _stream->readSint16LE();
                  _frameCoords[i].bottom = _stream->readSint16LE();
            }
      }

      // 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;
}

00184 void Imd::unload() {
      clear();
}

00188 void Imd::setXY(int16 x, int16 y) {
      // Adjusting the standard coordinates
      if (_stdX != -1) {
            if (x >= 0)
                  _stdX = _stdX - _x + x;
            if (y >= 0)
                  _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 >= 0) {
                              _frameCoords[i].left = _frameCoords[i].left - _x + x;
                              _frameCoords[i].right = _frameCoords[i].right - _x + x;
                        }
                        if (y >= 0) {
                              _frameCoords[i].top = _frameCoords[i].top - _y + y;
                              _frameCoords[i].bottom = _frameCoords[i].bottom - _y + y;
                        }
                  }
            }
      }

      if (x >= 0)
            _x = x;
      if (y >= 0)
            _y = y;
}

00219 void Imd::setVideoMemory(byte *vidMem, uint16 width, uint16 height) {
      deleteVidMem();

      _hasOwnVidMem = false;
      _vidMem = vidMem;
      _vidMemWidth = width;
      _vidMemHeight = height;
}

00228 void Imd::setVideoMemory() {
      deleteVidMem();

      if ((_width > 0) && (_height > 0)) {
            setXY(0, 0);
            _hasOwnVidMem = true;
            _vidMem = new byte[_width * _height];
            _vidMemWidth = _width;
            _vidMemHeight = _height;
      }
}

00240 void Imd::enableSound(Audio::Mixer &mixer) {
      // Only possible on the first frame
      if (_curFrame > 0)
            return;

      _mixer = &mixer;
      _soundEnabled = true;
}

00249 void Imd::disableSound() {
      if (_audioStream) {

            if (_soundStage == 2) {
                  _audioStream->finish();
                  _mixer->stopHandle(_audioHandle);
            } else
                  delete _audioStream;

            _audioStream = 0;
            _soundStage = 0;
      }
      _soundEnabled = false;
      _mixer = 0;
}

00265 void Imd::seekFrame(int32 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 < 0) || (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);
      _curFrame = frame;
}

00303 CoktelVideo::State Imd::nextFrame() {
      return processFrame(_curFrame);
}

00307 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("Video 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);
}

00328 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;

      _soundFlags = 0;
      _soundFreq = 0;
      _soundSliceSize = 0;
      _soundSlicesCount = 0;
      _soundSliceLength = 0;

      _audioStream = 0;

      _frameLength = 0;
      _lastFrameTime = 0;
}

CoktelVideo::State Imd::processFrame(uint16 frame) {
      State state;
      uint32 cmd = 0;
      bool hasNextCmd = false;
      bool startSound = false;

      if (!_stream || (frame >= _framesCount)) {
            state.flags = kStateBreak;
            return state;
      }

      if (frame != _curFrame) {
            state.flags |= kStateSeeked;
            seekFrame(frame);
      }

      if (!_vidMem)
            setVideoMemory();

      state.left = _x;
      state.top = _y;
      state.right = _width + state.left - 1;
      state.bottom = _height + state.top - 1;

      do {
            if (frame != 0) {
                  if (_stdX != -1) {
                        state.left = _stdX;
                        state.top = _stdY;
                        state.right = _stdWidth + state.left - 1;
                        state.bottom = _stdHeight + state.top - 1;
                        state.flags |= kStateStdCoords;
                  }
                  if (_frameCoords &&
                              (_frameCoords[frame].left != -1)) {
                        state.left = _frameCoords[frame].left;
                        state.top = _frameCoords[frame].top;
                        state.right = _frameCoords[frame].right;
                        state.bottom = _frameCoords[frame].bottom;
                        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;

                  // 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);

                              if (_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->readSint16LE();
                  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);

                  if (_vidMemWidth <= state.right) {
                        state.left = 0;
                        state.right -= state.left;
                  }
                  if (_vidMemWidth <= state.right)
                        state.right = _vidMemWidth - 1;
                  if (_vidMemHeight <= state.bottom) {
                        state.top = 0;
                        state.bottom -= state.top;
                  }
                  if (_vidMemHeight <= state.bottom)
                        state.bottom = _vidMemHeight -1;

                  state.flags |= renderFrame(state.left, state.top, state.right, state.bottom);
                  state.flags |= _frameData[0];

            // Frame video data
            } else if (cmd != 0) {

                  _stream->read(_frameData, cmd + 2);

                  state.flags |= renderFrame(state.left, state.top, state.right, state.bottom);
                  state.flags |= _frameData[0];

            } else
                  state.flags |= kStateNoVideoData;

      } while (hasNextCmd);

      if (startSound && _soundEnabled) {
            _mixer->playInputStream(Audio::Mixer::kSFXSoundType, &_audioHandle, _audioStream);
            _soundStartTime = g_system->getMillis();
            _skipFrames = 0;
            _soundStage = 2;
      }

      _curFrame++;
      if ((_curFrame == _framesCount) && (_soundStage == 2)) {
            _audioStream->finish();
            _mixer->stopHandle(_audioHandle);
            _audioStream = 0;
            _soundStage = 0;
      }

      _lastFrameTime = g_system->getMillis();
      return state;
}

uint32 Imd::renderFrame(int16 left, int16 top, int16 right, int16 bottom) {
      if (!_frameData || !_vidMem || (_width <= 0) || (_height <= 0))
            return 0;

      uint32 retVal = 0;
      int16 width = right - left + 1;
      int16 height = bottom - top + 1;
      int16 sW = _vidMemWidth;
      byte *dataPtr = _frameData;
      byte *imdVidMem = _vidMem + sW * top + left;
      byte *srcPtr;
      uint8 type = *dataPtr++;

      if (type & 0x10) { // Palette data
            // One byte index
            int index = *dataPtr++;
            // 16 entries with each 3 bytes (RGB)
            memcpy(_palette + index * 3, dataPtr, MIN((255 - index) * 3, 48));

            retVal = kStatePalette;
            dataPtr += 48;
            type ^= 0x10;
      }

      srcPtr = dataPtr;

      if (type & 0x80) { // Frame data is compressed
            srcPtr = _vidBuffer;
            type &= 0x7F;
            if ((type == 2) && (width == sW)) {
                  deLZ77(imdVidMem, dataPtr);
                  return retVal;
            } else
                  deLZ77(srcPtr, dataPtr);
      }

      uint16 pixCount, pixWritten;
      byte *imdVidMemBak;

      if (type == 2) { // Whole block
            for (int i = 0; i < height; i++) {
                  memcpy(imdVidMem, srcPtr, width);
                  srcPtr += width;
                  imdVidMem += sW;
            }
      } else if (type == 1) { // Sparse block
            imdVidMemBak = imdVidMem;
            for (int i = 0; i < height; i++) {
                  pixWritten = 0;
                  while (pixWritten < width) {
                        pixCount = *srcPtr++;
                        if (pixCount & 0x80) { // data
                              pixCount = MIN((pixCount & 0x7F) + 1, width - 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 < height; i++) {
                  imdVidMemBak = imdVidMem;

                  for (int j = 0; j < width; j += 4, imdVidMem += 4, srcPtr++)
                        memset(imdVidMem, *srcPtr, 4);

                  imdVidMemBak += sW;
                  imdVidMem = imdVidMemBak;
            }
      } else if ((type & 0xF) == 2) { // Whole half-high block
            for (; height > 1; height -= 2, imdVidMem += sW + sW, srcPtr += width) {
                  memcpy(imdVidMem, srcPtr, width);
                  memcpy(imdVidMem + sW, srcPtr, width);
            }
            if (height == -1)
                  memcpy(imdVidMem, srcPtr, width);
      } else { // Sparse half-high block
            imdVidMemBak = imdVidMem;
            for (int i = 0; i < height; i += 2) {
                  pixWritten = 0;
                  while (pixWritten < width) {
                        pixCount = *srcPtr++;
                        if (pixCount & 0x80) { // data
                              pixCount = MIN((pixCount & 0x7F) + 1, width - 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;
            }
      }

      return retVal;
}

void Imd::deLZ77(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_UINT32(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;

      }
}

const uint16 Vmd::_tableDPCM[128] = {
      0x0000, 0x0008, 0x0010, 0x0020, 0x0030, 0x0040, 0x0050, 0x0060, 0x0070, 0x0080,
      0x0090, 0x00A0, 0x00B0, 0x00C0, 0x00D0, 0x00E0, 0x00F0, 0x0100, 0x0110, 0x0120,
      0x0130, 0x0140, 0x0150, 0x0160, 0x0170, 0x0180, 0x0190, 0x01A0, 0x01B0, 0x01C0,
      0x01D0, 0x01E0, 0x01F0, 0x0200, 0x0208, 0x0210, 0x0218, 0x0220, 0x0228, 0x0230,
      0x0238, 0x0240, 0x0248, 0x0250, 0x0258, 0x0260, 0x0268, 0x0270, 0x0278, 0x0280,
      0x0288, 0x0290, 0x0298, 0x02A0, 0x02A8, 0x02B0, 0x02B8, 0x02C0, 0x02C8, 0x02D0,
      0x02D8, 0x02E0, 0x02E8, 0x02F0, 0x02F8, 0x0300, 0x0308, 0x0310, 0x0318, 0x0320,
      0x0328, 0x0330, 0x0338, 0x0340, 0x0348, 0x0350, 0x0358, 0x0360, 0x0368, 0x0370,
      0x0378, 0x0380, 0x0388, 0x0390, 0x0398, 0x03A0, 0x03A8, 0x03B0, 0x03B8, 0x03C0,
      0x03C8, 0x03D0, 0x03D8, 0x03E0, 0x03E8, 0x03F0, 0x03F8, 0x0400, 0x0440, 0x0480,
      0x04C0, 0x0500, 0x0540, 0x0580, 0x05C0, 0x0600, 0x0640, 0x0680, 0x06C0, 0x0700,
      0x0740, 0x0780, 0x07C0, 0x0800, 0x0900, 0x0A00, 0x0B00, 0x0C00, 0x0D00, 0x0E00,
      0x0F00, 0x1000, 0x1400, 0x1800, 0x1C00, 0x2000, 0x3000, 0x4000
};

Vmd::Vmd() {
      clear(false);
}

Vmd::~Vmd() {
      clear();
}

bool Vmd::load(Common::SeekableReadStream &stream) {
      unload();

      _stream = &stream;

      uint16 headerLength = _stream->readUint16LE();
      uint16 handle = _stream->readUint16LE();
      _version = _stream->readUint16LE();

      // Version checking
      if ((headerLength != 814) || (handle != 0) || (_version != 1)) {
            warning("VMD Version incorrect (%d, %d, %d)", headerLength, handle, _version);
            unload();
            return false;
      }

      _framesCount = _stream->readUint16LE();

      _x = _stream->readSint16LE();
      _y = _stream->readSint16LE();
      _width = _stream->readSint16LE();
      _height = _stream->readSint16LE();
      if ((_width != 0) && (_height != 0)) {
            _hasVideo = true;
            _features |= kFeaturesVideo;
      } else
            _hasVideo = false;

      _flags = _stream->readUint16LE();
      _partsPerFrame = _stream->readUint16LE();
      _firstFramePos = _stream->readUint32LE();
      _stream->skip(4); // Unknown

      _stream->read((byte *) _palette, 768);

      _frameDataSize = _stream->readUint32LE();
      _vidBufferSize = _stream->readUint32LE();

      if (_hasVideo) {
            if ((_frameDataSize == 0) || (_frameDataSize > 1048576))
                  _frameDataSize = _width * _height + 500;
            if ((_vidBufferSize == 0) || (_vidBufferSize > 1048576))
                  _vidBufferSize = _frameDataSize;

            _frameData = new byte[_frameDataSize];
            assert(_frameData);
            memset(_frameData, 0, _frameDataSize);
            _vidBuffer = new byte[_vidBufferSize];
            assert(_vidBuffer);
            memset(_vidBuffer, 0, _vidBufferSize);
      }

      _soundFreq = _stream->readSint16LE();
      _soundSliceSize = _stream->readSint16LE();
      _soundSlicesCount = _stream->readSint16LE();
      _soundFlags = _stream->readUint16LE();
      _hasSound = (_soundFreq != 0);

      if (_hasSound) {
            _features |= kFeaturesSound;

            _soundStereo = (_soundFlags & 0x8000) ? 1 : ((_soundFlags & 0x200) ? 2 : 0);
            if (_soundStereo > 0) {
                  warning("TODO: VMD stereo");
                  unload();
                  return false;
            }

            if (_soundSliceSize < 0) {
                  _soundBytesPerSample = 2;
                  _soundSliceSize = -_soundSliceSize;
            }

            _soundSliceLength = (uint16) (1000.0 /
                        ((double) _soundFreq / (double) _soundSliceSize));

            _frameLength = _soundSliceLength;

            _soundStage = 1;
            _audioStream = Audio::makeAppendableAudioStream(_soundFreq,
                        (_soundBytesPerSample == 2) ? Audio::Mixer::FLAG_16BITS : 0);
      } else
            _frameLength = 1000 / 12; // 12 FPS for a video without sound

      uint32 frameInfoOffset = _stream->readUint32LE();

      _stream->seek(frameInfoOffset);
      _frames = new Frame[_framesCount];
      for (uint16 i = 0; i < _framesCount; i++) {
            _frames[i].parts = new Part[_partsPerFrame];
            _stream->skip(2); // Unknown
            _frames[i].offset = _stream->readUint32LE();
      }
      for (uint16 i = 0; i < _framesCount; i++) {
            for (uint16 j = 0; j < _partsPerFrame; j++) {

                  _frames[i].parts[j].type = (PartType) _stream->readByte();
                  _stream->skip(1); // Unknown
                  _frames[i].parts[j].size = _stream->readUint32LE();

                  if (_frames[i].parts[j].type == kPartTypeAudio) {

                        _frames[i].parts[j].flags = _stream->readByte();
                        _stream->skip(9); // Unknown

                  } else if (_frames[i].parts[j].type == kPartTypeVideo) {

                        _frames[i].parts[j].left = _stream->readUint16LE();
                        _frames[i].parts[j].top = _stream->readUint16LE();
                        _frames[i].parts[j].right = _stream->readUint16LE();
                        _frames[i].parts[j].bottom = _stream->readUint16LE();
                        _stream->skip(1); // Unknown
                        _frames[i].parts[j].flags = _stream->readByte();

                  } else {
                        // Unknow type
                        _stream->skip(10);
                  }

            }
      }

      return true;
}

void Vmd::unload() {
      clear();
}

void Vmd::setXY(int16 x, int16 y) {

      for (int i = 0; i < _framesCount; i++) {
            for (int j = 0; j < _partsPerFrame; j++) {

                  if (_frames[i].parts[j].type == kPartTypeVideo) {
                        if (x >= 0) {
                              _frames[i].parts[j].left = _frames[i].parts[j].left - _x + x;
                              _frames[i].parts[j].right = _frames[i].parts[j].right - _x + x;
                        }
                        if (y >= 0) {
                              _frames[i].parts[j].top = _frames[i].parts[j].top - _y + y;
                              _frames[i].parts[j].bottom = _frames[i].parts[j].bottom - _y + y;
                        }
                  }

            }
      }

      if (x >= 0)
            _x = x;
      if (y >= 0)
            _y = y;
}

void Vmd::seekFrame(int32 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 < 0) || (frame >= _framesCount))
            // Nothing to do
            return;

      // Seek
      _stream->seek(_frames[frame].offset);
      _curFrame = frame;
}

CoktelVideo::State Vmd::nextFrame() {
      State state;

      state = processFrame(_curFrame);
      _curFrame++;
      return state;
}

void Vmd::clear(bool del) {
      Imd::clear(del);

      if (del) {
            delete[] _frames;
      }

      _hasVideo = true;

      _partsPerFrame = 0;
      _frames = 0;

      _soundBytesPerSample = 1;
      _soundStereo = 0;
}

CoktelVideo::State Vmd::processFrame(uint16 frame) {
      State state;
      bool startSound = false;

      seekFrame(frame);

      state.flags |= kStateNoVideoData;
      state.left = 0x7FFF;
      state.right = 0x7FFF;
      state.top = 0;
      state.bottom = 0;

      if (!_vidMem)
            setVideoMemory();

      for (uint16 i = 0; i < _partsPerFrame; i++) {
            Part &part = _frames[frame].parts[i];

            if (part.type == kPartTypeAudio) {
                  // Next sound slice data
                  if (part.flags == 1) {

                        if (_soundEnabled) {
                              filledSoundSlice(part.size);

                              if (_soundStage == 1)
                                    startSound = true;

                        } else
                              _stream->skip(part.size);

                  // Initial sound data (all slices)
                  } else if (part.flags == 2) {

                        if (_soundEnabled) {
                              uint32 mask = _stream->readUint32LE();
                              filledSoundSlices(part.size - 4, mask);

                              if (_soundStage == 1)
                                    startSound = true;

                        } else
                              _stream->skip(part.size);

                  // Empty sound slice
                  } else if (part.flags == 3) {

                        if (_soundEnabled) {
                              emptySoundSlice(_soundSliceSize * _soundBytesPerSample);

                              if (_soundStage == 1)
                                    startSound = true;
                        }

                        _stream->skip(part.size);
                  } else {
                        warning("Unknown sound part type %d", part.flags);
                        _stream->skip(part.size);
                  }

            } else if (part.type == kPartTypeVideo) {
                  state.flags &= ~kStateNoVideoData;

                  // New palette
                  if (part.flags & 2) {
                        uint8 index = _stream->readByte();
                        uint8 count = _stream->readByte();

                        _stream->read(_palette + index * 3, (count + 1) * 3);
                        _stream->skip((255 - count) * 3);

                        state.flags |= kStatePalette;
                  }

                  _stream->read(_frameData, part.size);
                  if (renderFrame(part.left, part.top, part.right, part.bottom)) {
                        // Rendering succeeded, merging areas
                        state.left = MIN(state.left, part.left);
                        state.top = MIN(state.top, part.top);
                        state.right = MAX(state.right, part.right);
                        state.bottom = MAX(state.bottom, part.bottom);
                  }

            } else if (part.type == 4) {
                  // Unknown
                  _stream->skip(part.size);
            } else {
                  // Unknow type
//                warning("Unknown frame part type %d, size %d (%d of %d)", part.type, part.size, i + 1, _partsPerFrame);
            }
      }

      if (startSound && _soundEnabled) {
            _mixer->playInputStream(Audio::Mixer::kSFXSoundType, &_audioHandle, _audioStream);
            _soundStartTime = g_system->getMillis();
            _skipFrames = 0;
            _soundStage = 2;
      }

      if ((_curFrame == (_framesCount - 1)) && (_soundStage == 2)) {
            _audioStream->finish();
            _mixer->stopHandle(_audioHandle);
            _audioStream = 0;
            _soundStage = 0;
      }

      _lastFrameTime = g_system->getMillis();
      return state;
}

uint32 Vmd::renderFrame(int16 left, int16 top, int16 right, int16 bottom) {
      if (!_frameData || !_vidMem || (_width <= 0) || (_height <= 0))
            return 0;

      int16 width = right - left + 1;
      int16 height = bottom - top + 1;
      int16 sW = _vidMemWidth;
      byte *dataPtr = _frameData;
      byte *imdVidMem = _vidMem + sW * top + left;
      byte *srcPtr;
      uint8 type = *dataPtr++;

      srcPtr = dataPtr;

      if (type & 0x80) { // Frame data is compressed
            srcPtr = _vidBuffer;
            type &= 0x7F;
            if ((type == 2) && (width == sW)) {
                  deLZ77(imdVidMem, dataPtr);
                  return 1;
            } else
                  deLZ77(srcPtr, dataPtr);
      }

      uint16 pixCount, pixWritten;
      byte *imdVidMemBak;

      if (type == 1) { // Sparse block
            imdVidMemBak = imdVidMem;
            for (int i = 0; i < height; i++) {
                  pixWritten = 0;
                  while (pixWritten < width) {
                        pixCount = *srcPtr++;
                        if (pixCount & 0x80) { // data
                              pixCount = MIN((pixCount & 0x7F) + 1, width - 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 == 2) { // Whole block
            for (int i = 0; i < height; i++) {
                  memcpy(imdVidMem, srcPtr, width);
                  srcPtr += width;
                  imdVidMem += sW;
            }
      } else if (type == 3) { // RLE block
            warning("Frame render method 3: RLE block");
            return 0;
      } else {
            warning("Unkown frame rendering method %d (0x%X)", type, type);
            return 0;
      }

      return 1;
}

void Vmd::emptySoundSlice(uint32 size) {
      byte *soundBuf = new byte[size];
      assert(soundBuf);

      memset(soundBuf, 0, size);

      _audioStream->queueBuffer(soundBuf, size);
}

void Vmd::soundSlice8bit(uint32 size) {
      byte *soundBuf = new byte[size];
      assert(soundBuf);

      _stream->read(soundBuf, size);
      unsignedToSigned(soundBuf, size);

      _audioStream->queueBuffer(soundBuf, size);
}

void Vmd::soundSlice16bit(uint32 size, int16 &init) {
      byte *dataBuf = new byte[size];
      byte *soundBuf = new byte[size * 2];

      _stream->read(dataBuf, size);
      deDPCM(soundBuf, dataBuf, init, size);
      _audioStream->queueBuffer(soundBuf, size * 2);

      delete[] dataBuf;
}

void Vmd::filledSoundSlice(uint32 size) {
      if (_soundBytesPerSample == 1) {
            soundSlice8bit(size);
      } else if (_soundBytesPerSample == 2) {
            int16 init = _stream->readSint16LE();
            soundSlice16bit(size - 1, init);
      }
}

void Vmd::filledSoundSlices(uint32 size, uint32 mask) {
      int n = MIN<int>(_soundSlicesCount - 1, 31);
      for (int i = 0; i < n; i++) {

            if (mask & 1)
                  emptySoundSlice(_soundSliceSize * _soundBytesPerSample);
            else
                  filledSoundSlice(_soundSliceSize);

            mask >>= 1;
      }
      if (_soundSlicesCount > 32)
            filledSoundSlice((_soundSlicesCount - 32) * _soundSliceSize);
}

void Vmd::deDPCM(byte *soundBuf, byte *dataBuf, int16 &init, uint32 n) {
      int16 *out = (int16 *) soundBuf;

      int32 s = init;
      for (uint32 i = 0; i < n; i++) {
            if (dataBuf[i] & 0x80)
                  s -= _tableDPCM[dataBuf[i] & 0x7F];
            else
                  s += _tableDPCM[dataBuf[i]];

            s = CLIP<int32>(s, -32768, 32767);
            *out++ = TO_BE_16(s);
      }
}

} // End of namespace Gob

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