From 602116df9b5a5f905b45baa99d4990443ee934c9 Mon Sep 17 00:00:00 2001 From: Justin Ruggles Date: Sun, 3 Aug 2008 21:42:43 +0000 Subject: Hardcode the table for ungrouping 3 values in 5 bits. It will be reused by the E-AC-3 decoder. Originally committed as revision 14527 to svn://svn.ffmpeg.org/ffmpeg/trunk --- libavcodec/ac3dec_data.c | 16 ++++++++++++++++ 1 file changed, 16 insertions(+) (limited to 'libavcodec/ac3dec_data.c') diff --git a/libavcodec/ac3dec_data.c b/libavcodec/ac3dec_data.c index 86e61aa379..a04bbc0c53 100644 --- a/libavcodec/ac3dec_data.c +++ b/libavcodec/ac3dec_data.c @@ -27,6 +27,22 @@ #include "ac3dec_data.h" #include "ac3.h" +/** + * table used to ungroup 3 values stored in 5 bits. + * used by bap=1 mantissas and GAQ. + * ff_ac3_ungroup_3_in_5_bits_tab[i] = { i/9, (i%9)/3, (i%9)%3 } + */ +const uint8_t ff_ac3_ungroup_3_in_5_bits_tab[32][3] = { + { 0, 0, 0 }, { 0, 0, 1 }, { 0, 0, 2 }, { 0, 1, 0 }, + { 0, 1, 1 }, { 0, 1, 2 }, { 0, 2, 0 }, { 0, 2, 1 }, + { 0, 2, 2 }, { 1, 0, 0 }, { 1, 0, 1 }, { 1, 0, 2 }, + { 1, 1, 0 }, { 1, 1, 1 }, { 1, 1, 2 }, { 1, 2, 0 }, + { 1, 2, 1 }, { 1, 2, 2 }, { 2, 0, 0 }, { 2, 0, 1 }, + { 2, 0, 2 }, { 2, 1, 0 }, { 2, 1, 1 }, { 2, 1, 2 }, + { 2, 2, 0 }, { 2, 2, 1 }, { 2, 2, 2 }, { 3, 0, 0 }, + { 3, 0, 1 }, { 3, 0, 2 }, { 3, 1, 0 }, { 3, 1, 1 } +}; + const uint8_t ff_eac3_hebap_tab[64] = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 8, 8, 8, 9, 9, 9, 10, 10, 10, 10, 11, -- cgit v1.2.3