uint32 Decompress(const unsigned char* lzoBuff, uint32 lzoBuffLen, iDynamicBuffer& rawBuff)
{
uint16 hdr;
memcpy(&hdr, lzoBuff, sizeof(uint16));
lzoBuffLen -= sizeof(uint16);
lzoBuff += sizeof(uint16);
if (hdr != LZO_BLOCK_HDR) {
check(0);
return 0;
}
unsigned long raw_buf_len;
memcpy(&raw_buf_len, lzoBuff, sizeof(unsigned long));
lzoBuffLen -= sizeof(uint32);
lzoBuff += sizeof(uint32);
if (raw_buf_len <= 0 || raw_buf_len > LZO_MAX_BUF_LEN) {
check(0);
return 0;
}
rawBuff.ReInit(raw_buf_len);
rawBuff.IncSize( raw_buf_len );
int res = lzo1x_decompress(lzoBuff,lzoBuffLen,(unsigned char*)rawBuff.GetData(),&raw_buf_len,NULL);
if (res != LZO_E_OK) {
check(0);
return 0;
}
return raw_buf_len;
}
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;
}
