public bool Decode(byte[] dst, byte[] src)
{
if ((_tableBig == null) || (_tableSmall == null) || (_deltaBuf == null))
{
return(false);
}
_offset1 = _deltaBufs[1] - _curBuf;
_offset2 = _deltaBufs[0] - _curBuf;
int seq_nb = BitConverter.ToUInt16(src, 0);
int gfx_data = 26;
if (seq_nb == 0)
{
MakeTables47(_width);
ScummHelper.ArraySet(_deltaBuf, src[12], 0);
ScummHelper.ArraySet(_deltaBuf, src[13], _frameSize);
_prevSeqNb = -1;
}
if ((src[4] & 1) != 0)
{
gfx_data += 32896;
}
switch (src[2])
{
case 0:
Array.Copy(src, gfx_data, _deltaBuf, _curBuf, _frameSize);
break;
case 1:
// Used by Outlaws, but not by any SCUMM game.
throw new NotImplementedException("codec47: not implemented decode1 proc");
case 2:
if (seq_nb == _prevSeqNb + 1)
{
Decode2(_deltaBuf, _curBuf, src, gfx_data, _width, _height, src, 8);
}
break;
case 3:
Array.Copy(_deltaBuf, _deltaBufs[1], _deltaBuf, _curBuf, _frameSize);
break;
case 4:
Array.Copy(_deltaBuf, _deltaBufs[0], _deltaBuf, _curBuf, _frameSize);
break;
case 5:
Codec37Decoder.BompDecodeLine(src, gfx_data, _deltaBuf, _curBuf, BitConverter.ToInt32(src, 14));
break;
}
Array.Copy(_deltaBuf, _curBuf, dst, 0, _frameSize);
if (seq_nb == _prevSeqNb + 1)
{
if (src[3] == 1)
{
ScummHelper.Swap(ref _curBuf, ref _deltaBufs[1]);
}
else if (src[3] == 2)
{
ScummHelper.Swap(ref _deltaBufs[0], ref _deltaBufs[1]);
ScummHelper.Swap(ref _deltaBufs[1], ref _curBuf);
}
}
_prevSeqNb = seq_nb;
return(true);
}
void DecodeFrameObject(int codec, byte[] src, int left, int top, int width, int height)
{
if ((height == 242) && (width == 384))
{
if (_specialBuffer == null)
_specialBuffer = new byte[242 * 384];
_dst = _specialBuffer;
}
else if ((height > _vm.ScreenHeight) || (width > _vm.ScreenWidth))
return;
// FT Insane uses smaller frames to draw overlays with moving objects
// Other .san files do have them as well but their purpose in unknown
// and often it causes memory overdraw. So just skip those frames
else if (!_insanity && ((height != _vm.ScreenHeight) || (width != _vm.ScreenWidth)))
return;
if ((height == 242) && (width == 384))
{
_width = width;
_height = height;
}
else
{
_width = _vm.ScreenWidth;
_height = _vm.ScreenHeight;
}
switch (codec)
{
case 1:
case 3:
SmushDecodeCodec1(_dst, 0, src, 0, left, top, width, height, _vm.ScreenWidth);
break;
case 37:
if (_codec37 == null)
_codec37 = new Codec37Decoder(width, height);
_codec37.Decode(_dst, src);
break;
case 47:
if (_codec47 == null)
_codec47 = new Codec47Decoder(width, height);
_codec47.Decode(_dst, src);
break;
default:
throw new InvalidOperationException(string.Format("Invalid codec for frame object : {0}", codec));
}
if (_storeFrame)
{
if (_frameBuffer == null)
{
_frameBuffer = new byte[_width * _height];
}
Array.Copy(_dst, _frameBuffer, width * height);
_storeFrame = false;
}
}
void DecodeFrameObject(int codec, byte[] src, int left, int top, int width, int height)
{
if ((height == 242) && (width == 384))
{
if (_specialBuffer == null)
{
_specialBuffer = new byte[242 * 384];
}
_dst = _specialBuffer;
}
else if ((height > _vm.ScreenHeight) || (width > _vm.ScreenWidth))
{
return;
}
// FT Insane uses smaller frames to draw overlays with moving objects
// Other .san files do have them as well but their purpose in unknown
// and often it causes memory overdraw. So just skip those frames
else if (!_insanity && ((height != _vm.ScreenHeight) || (width != _vm.ScreenWidth)))
{
return;
}
if ((height == 242) && (width == 384))
{
_width = width;
_height = height;
}
else
{
_width = _vm.ScreenWidth;
_height = _vm.ScreenHeight;
}
switch (codec)
{
case 1:
case 3:
SmushDecodeCodec1(_dst, 0, src, 0, left, top, width, height, _vm.ScreenWidth);
break;
case 37:
if (_codec37 == null)
{
_codec37 = new Codec37Decoder(width, height);
}
_codec37.Decode(_dst, src);
break;
case 47:
if (_codec47 == null)
{
_codec47 = new Codec47Decoder(width, height);
}
_codec47.Decode(_dst, src);
break;
default:
throw new InvalidOperationException(string.Format("Invalid codec for frame object : {0}", codec));
}
if (_storeFrame)
{
if (_frameBuffer == null)
{
_frameBuffer = new byte[_width * _height];
}
Array.Copy(_dst, _frameBuffer, width * height);
_storeFrame = false;
}
}
