bool iMemoryDib::Bit2Byte(const iDynamicBuffer& in_buff, iDynamicBuffer& out_buff)
{
check(in_buff.GetSize());
uint32 nsiz = in_buff.GetSize()*8;
out_buff.ReInit(nsiz);
for (uint32 xx=0; xx<in_buff.GetSize(); ++xx){
uint8 data;
in_buff.Read(data);
for (uint32 zz=0; zz<8; ++zz){
uint8 bd = (uint8)(((data >> zz)&1)?255:0);
out_buff.Write(bd);
}
}
return true;
}
bool iMemoryDib::Byte2Bit(const iDynamicBuffer& in_buff, iDynamicBuffer& out_buff)
{
check(in_buff.GetSize());
uint32 nsiz = in_buff.GetSize()/8 + ((in_buff.GetSize()%8==0)?0:1);
out_buff.ReInit(nsiz);
for (uint32 xx=0; xx<nsiz; ++xx){
uint32 cnt=0;
uint8 data=0;
uint8 odata=0;
while (cnt<8 && in_buff.Read(data)) {
odata |= (data?1<<cnt:0);
cnt++;
}
out_buff.Write(odata);
}
out_buff.Seek(0);
return true;
}
uint32 Compress(const unsigned char* rawBuff, uint32 rawBuffLen, iDynamicBuffer& lzoBuff)
{
check(rawBuffLen > 0 && rawBuffLen <= LZO_MAX_BUF_LEN);
unsigned long out_len = (rawBuffLen + rawBuffLen / 16 + 64 + 3);
unsigned char* buff = new unsigned char[out_len];
// compress from `in' to `out' with LZO1X-1
int res = lzo1x_1_compress(rawBuff,rawBuffLen,buff,&out_len,wrkmem);
if (res != LZO_E_OK) {
// this should NEVER happen
delete[] buff;
check(0);
return 0;
}
lzoBuff.Write(LZO_BLOCK_HDR);
lzoBuff.Write(rawBuffLen);
lzoBuff.Write(buff, out_len);
delete[] buff;
return lzoBuff.GetSize();
}
