s3tc-dxt-decompression | S3TC DXT1/DXT5 texture decompression routines | Compression library

I've read a lot of articles and code but I still cannot get this to work, I've read all the 128 bytes of the header in my texture and them read 65536 bytes of compressed data of the actual texture(the texture's resolution is 256x256 and each compressed pixel uses 1 byte). I've tried to create my decompression algorithm with no success, them I've decided to use someone's else, so I found this code here. This is the arguments I was trying to pass to it so it would decompress my DDS texture.BlockDecompressImageDXT5(textureHeader.dwWidth, textureHeader.dwHeight, temp, packedData) Note: textureHeader is a valid struct with the DDS texture's header data loaded into it, temp is a unsigned char array holding all the DDS data that was read from the DDS texture and packedData is a unsigned long array I was expecting to receive the final decompressed data. So in the code I've linked, the RGBA channels for each pixel were packed in the PackRGBA function, one byte for each color in the packedData. Before pointing the data to the texture's data at D3D11_SUBRESOURCE_DATApSysMem, I've distributed each byte from the unsigned long packedData to 4 different unsigned char m_DDSData this way: