[Flac-dev] RE: basic encoder help

[Andrew Gatt]

>I'm currently facing the same problem.
>I added the libFLAC++ libraries to my MSVC application.
>I implemented the same quality levels (0-8) as used in the FLAC frontend application.
>But the resulting files are remarkable different between my application and the FLAC frontend >(although using the same settings).

It did turn out to be something in my byte ordering in the end as suggested. I tested the decompressed file against the original wav file and it checked out and played fine, but when i rearranged the byte ordering to use signed char instead of the unsigned chars i was feeding it, the compression ratio was greatly improved. As a quick hack i ended up with:

for (int i=0; i<2352; i+=4) {			// 2352 because number of bytes in frame of CDDA
		sample[j++]=(((char)buffer[i+1]<<8)|(0x00ff&(int)(char)buffer[i]));
		sample[j++]=(((char)buffer[i+3]<<8)|(0x00ff&(int)(char)buffer[i+2]));
		}

the (char) casts made all the difference. I'll change the software to use all signed chars, but this works for now.

HTH.

Andrew