2004-02-24 00:41:20 +01:00
|
|
|
|
|
|
|
libmad - MPEG audio decoder library
|
2004-03-05 00:19:57 +01:00
|
|
|
Copyright (C) 2000-2004 Underbit Technologies, Inc.
|
2004-02-24 00:41:20 +01:00
|
|
|
|
2004-03-05 00:19:57 +01:00
|
|
|
$Id: TODO,v 1.3 2004/02/05 09:02:39 rob Exp $
|
2004-02-24 00:41:20 +01:00
|
|
|
|
|
|
|
===============================================================================
|
|
|
|
|
|
|
|
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 checks
|
|
|
|
|
|
|
|
fixed.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; \
|
|
|
|
})
|
|
|
|
# endif
|
|
|
|
|
|
|
|
libmad Layer I:
|
|
|
|
- check frame length sanity
|
|
|
|
|
|
|
|
libmad Layer II:
|
|
|
|
- check frame length sanity
|
|
|
|
|
|
|
|
libmad 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
|
|
|
|
|