On Thu, Dec 3, 2015 at 8:13 PM, Ganesh Ajjanagadde <gajjanaga...@gmail.com> wrote: > On Sun, Nov 29, 2015 at 10:58 PM, Ganesh Ajjanagadde > <gajjanaga...@gmail.com> wrote: >> 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. >> >> Signed-off-by: Ganesh Ajjanagadde <gajjanaga...@gmail.com> >> --- >> libavcodec/Makefile | 8 ++----- >> libavcodec/aacsbr_fixed_tablegen.c | 42 >> ------------------------------------- >> libavcodec/aacsbr_fixed_tablegen.h | 4 ---- >> libavcodec/aacsbr_tablegen.c | 42 >> ------------------------------------- >> libavcodec/aacsbr_tablegen.h | 4 ---- >> libavcodec/aacsbr_tablegen_common.h | 4 ---- >> 6 files changed, 2 insertions(+), 102 deletions(-) >> delete mode 100644 libavcodec/aacsbr_fixed_tablegen.c >> delete mode 100644 libavcodec/aacsbr_tablegen.c [...] > ping for AAC people or anyone else interested.
rebased on master, posted v2 that is essentially identical. _______________________________________________ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-devel
