1
0
mirror of https://github.com/FFmpeg/FFmpeg.git synced 2024-12-02 03:06:28 +02:00
Commit Graph

2 Commits

Author SHA1 Message Date
Ganesh Ajjanagadde
cb93df0dcb avcodec/aacsbr_tablegen: always initialize tables at runtime
This gets rid of virtually useless hardcoded tables hackery. The reason
it is useless is that a 320 element lut is anyway placed regardless of
--enable-hardcoded-tables, from which all necessary tables are trivially
derived at runtime at very low cost:

sample benchmark (x86-64, Haswell, GNU/Linux, single run is really
what is relevant here since looping drastically changes the bench). Fluctuations
are on the order of 10% for the single run test:
39400 decicycles in aacsbr_tableinit,       1 runs,      0 skips
25325 decicycles in aacsbr_tableinit,       2 runs,      0 skips
18475 decicycles in aacsbr_tableinit,       4 runs,      0 skips
15008 decicycles in aacsbr_tableinit,       8 runs,      0 skips
13016 decicycles in aacsbr_tableinit,      16 runs,      0 skips
12005 decicycles in aacsbr_tableinit,      32 runs,      0 skips
11546 decicycles in aacsbr_tableinit,      64 runs,      0 skips
11506 decicycles in aacsbr_tableinit,     128 runs,      0 skips
11500 decicycles in aacsbr_tableinit,     256 runs,      0 skips
11183 decicycles in aacsbr_tableinit,     509 runs,      3 skips

Tested with FATE with/without --enable-hardcoded-tables.

Reviewed-by: Rostislav Pehlivanov <atomnuker@gmail.com>
Signed-off-by: Ganesh Ajjanagadde <gajjanagadde@gmail.com>
2015-12-09 07:36:58 -05:00
Jovan Zelincevic
b0414da90d avcodec: Table creation for AAC_fixed_decoder (SBR-module)
Create tables for fixed point code.

Signed-off-by: Nedeljko Babic <nedeljko.babic@imgtec.com>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
2015-07-20 17:20:16 +02:00