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| author | Justin Ruggles <justin.ruggles@gmail.com> | 2008-08-03 21:42:43 +0000 |
|---|---|---|
| committer | Justin Ruggles <justin.ruggles@gmail.com> | 2008-08-03 21:42:43 +0000 |
| commit | 602116df9b5a5f905b45baa99d4990443ee934c9 (patch) | |
| tree | b29a234860c1a6652b5724f71a458878281863e0 /libavcodec/ac3dec_data.c | |
| parent | 021b8ae39bbd436282a6a428c1d5e65a30ef3d27 (diff) | |
| download | ffmpeg-602116df9b5a5f905b45baa99d4990443ee934c9.tar.gz | |
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
Diffstat (limited to 'libavcodec/ac3dec_data.c')
| -rw-r--r-- | libavcodec/ac3dec_data.c | 16 |
1 files changed, 16 insertions, 0 deletions
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, |