libmad - MPEG audio decoder library Copyright (C) 2000-2003 Underbit Technologies, Inc. $Id: TODO,v 1.1 2003/05/29 04:39:34 rob Exp $===============================================================================libmad:  - more API layers (buffering, PCM samples, dithering, etc.)  - x86 performance optimization compiler flags  - function documentation, general docs  - finish async API  - parse system streams?  - MPEG-2 MC, AAC?  - logarithmic multiplication?  - multiple frame decoding for better locality of reference?  - frame serial numbers, Layer III frame continuity checksfixed.h:  - experiment with FPM_INTEL:# if 1#    define mad_f_scale64(hi, lo)  \    ({ mad_fixed_t __result;  \       asm ("shrl %3,%1\n\t"  \	    "shll %4,%2\n\t"  \	    "orl %2,%1"  \	    : "=rm" (__result)  \	    : "0" (lo), "r" (hi),  \	      "I" (MAD_F_SCALEBITS), "I" (32 - MAD_F_SCALEBITS)  \	    : "cc");  \       __result;  \    })# else#    define mad_f_scale64(hi, lo)  \    ({ mad_fixed64hi_t __hi_;  \       mad_fixed64lo_t __lo_;  \       mad_fixed_t __result;  \       asm ("sall %2,%1"  \	    : "=r" (__hi_)  \	    : "0" (hi), "I" (32 - MAD_F_SCALEBITS)  \	    : "cc");  \       asm ("shrl %2,%1"  \	    : "=r" (__lo_)  \	    : "0" (lo), "I" (MAD_F_SCALEBITS)  \	    : "cc");  \       asm ("orl %1,%2"  \	    : "=rm" (__result)  \	    : "r" (__hi_), "0" (__lo_)  \	    : "cc");  \       __result;  \    })# endiflibmad Layer I:  - check frame length sanitylibmad Layer II:  - check legal bitrate/mode combinations  - check frame length sanitylibmad Layer III:  - circular buffer  - optimize zero_part from Huffman decoding throughout  - MPEG 2.5 8000 Hz sf bands? mixed blocks?  - stereo->mono conversion optimization?  - enable frame-at-a-time decoding  - improve portability of huffman.c