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author | Sean Bartell <wingedtachikoma@gmail.com> | 2011-06-25 21:32:25 -0400 |
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committer | Nils Wallménius <nils@rockbox.org> | 2012-04-25 22:13:20 +0200 |
commit | f40bfc9267b13b54e6379dfe7539447662879d24 (patch) | |
tree | 9b20069d5e62809ff434061ad730096836f916f2 /lib/rbcodec/codecs/libmad/TODO | |
parent | a0009907de7a0107d49040d8a180f140e2eff299 (diff) | |
download | rockbox-f40bfc9267b13b54e6379dfe7539447662879d24.tar.gz rockbox-f40bfc9267b13b54e6379dfe7539447662879d24.zip |
Add codecs to librbcodec.
Change-Id: Id7f4717d51ed02d67cb9f9cb3c0ada4a81843f97
Reviewed-on: http://gerrit.rockbox.org/137
Reviewed-by: Nils Wallménius <nils@rockbox.org>
Tested-by: Nils Wallménius <nils@rockbox.org>
Diffstat (limited to 'lib/rbcodec/codecs/libmad/TODO')
-rw-r--r-- | lib/rbcodec/codecs/libmad/TODO | 69 |
1 files changed, 69 insertions, 0 deletions
diff --git a/lib/rbcodec/codecs/libmad/TODO b/lib/rbcodec/codecs/libmad/TODO new file mode 100644 index 0000000000..a397655c6c --- /dev/null +++ b/lib/rbcodec/codecs/libmad/TODO | |||
@@ -0,0 +1,69 @@ | |||
1 | |||
2 | libmad - MPEG audio decoder library | ||
3 | Copyright (C) 2000-2004 Underbit Technologies, Inc. | ||
4 | |||
5 | $Id$ | ||
6 | |||
7 | =============================================================================== | ||
8 | |||
9 | libmad: | ||
10 | - more API layers (buffering, PCM samples, dithering, etc.) | ||
11 | - x86 performance optimization compiler flags | ||
12 | - function documentation, general docs | ||
13 | - finish async API | ||
14 | - parse system streams? | ||
15 | - MPEG-2 MC, AAC? | ||
16 | - logarithmic multiplication? | ||
17 | - multiple frame decoding for better locality of reference? | ||
18 | - frame serial numbers, Layer III frame continuity checks | ||
19 | |||
20 | fixed.h: | ||
21 | - experiment with FPM_INTEL: | ||
22 | |||
23 | # if 1 | ||
24 | # define mad_f_scale64(hi, lo) \ | ||
25 | ({ mad_fixed_t __result; \ | ||
26 | asm ("shrl %3,%1\n\t" \ | ||
27 | "shll %4,%2\n\t" \ | ||
28 | "orl %2,%1" \ | ||
29 | : "=rm" (__result) \ | ||
30 | : "0" (lo), "r" (hi), \ | ||
31 | "I" (MAD_F_SCALEBITS), "I" (32 - MAD_F_SCALEBITS) \ | ||
32 | : "cc"); \ | ||
33 | __result; \ | ||
34 | }) | ||
35 | # else | ||
36 | # define mad_f_scale64(hi, lo) \ | ||
37 | ({ mad_fixed64hi_t __hi_; \ | ||
38 | mad_fixed64lo_t __lo_; \ | ||
39 | mad_fixed_t __result; \ | ||
40 | asm ("sall %2,%1" \ | ||
41 | : "=r" (__hi_) \ | ||
42 | : "0" (hi), "I" (32 - MAD_F_SCALEBITS) \ | ||
43 | : "cc"); \ | ||
44 | asm ("shrl %2,%1" \ | ||
45 | : "=r" (__lo_) \ | ||
46 | : "0" (lo), "I" (MAD_F_SCALEBITS) \ | ||
47 | : "cc"); \ | ||
48 | asm ("orl %1,%2" \ | ||
49 | : "=rm" (__result) \ | ||
50 | : "r" (__hi_), "0" (__lo_) \ | ||
51 | : "cc"); \ | ||
52 | __result; \ | ||
53 | }) | ||
54 | # endif | ||
55 | |||
56 | libmad Layer I: | ||
57 | - check frame length sanity | ||
58 | |||
59 | libmad Layer II: | ||
60 | - check frame length sanity | ||
61 | |||
62 | libmad Layer III: | ||
63 | - circular buffer | ||
64 | - optimize zero_part from Huffman decoding throughout | ||
65 | - MPEG 2.5 8000 Hz sf bands? mixed blocks? | ||
66 | - stereo->mono conversion optimization? | ||
67 | - enable frame-at-a-time decoding | ||
68 | - improve portability of huffman.c | ||
69 | |||