diff options
| author | Roland Scheidegger <rscheidegger_lists@hispeed.ch> | 2012-04-27 22:12:19 +0200 |
|---|---|---|
| committer | Michael Niedermayer <michaelni@gmx.at> | 2012-04-28 20:02:27 +0200 |
| commit | 7f668cd2b5f13afa0de9f593948ce2f703ab5aaa (patch) | |
| tree | 4755bc3a5668cf24d7c83db139ebab1baa529e64 /libavcodec/cabac_functions.h | |
| parent | e52b96187b5451d44ec9bbbb4b6151aebac8b559 (diff) | |
| download | ffmpeg-7f668cd2b5f13afa0de9f593948ce2f703ab5aaa.tar.gz | |
h264: use one table instead of several for cabac functions
The reason is this is easier for PIC code (in particular on darwin...).
Keep the old names as pointers (static in cabac_functions.h so gcc
knows these are just immediate offsets) so the c code can nicely stay the same
(alternatively could use offsets directly in the functions needing the
tables). This should produce the same code as before with non-pic and better
code (confirmed) with pic.
The assembly uses the new table but still won't work for PIC case.
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
Diffstat (limited to 'libavcodec/cabac_functions.h')
| -rw-r--r-- | libavcodec/cabac_functions.h | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/libavcodec/cabac_functions.h b/libavcodec/cabac_functions.h index 90af15c243..ee70fcf985 100644 --- a/libavcodec/cabac_functions.h +++ b/libavcodec/cabac_functions.h @@ -36,9 +36,11 @@ # include "x86/cabac.h" #endif -extern const uint8_t ff_h264_norm_shift[512]; -extern uint8_t ff_h264_mlps_state[4*64]; -extern uint8_t ff_h264_lps_range[4*2*64]; ///< rangeTabLPS +extern uint8_t ff_h264_cabac_tables[512 + 4*2*64 + 4*64 + 63]; +static uint8_t * const ff_h264_norm_shift = ff_h264_cabac_tables + H264_NORM_SHIFT_OFFSET; +static uint8_t * const ff_h264_lps_range = ff_h264_cabac_tables + H264_LPS_RANGE_OFFSET; +static uint8_t * const ff_h264_mlps_state = ff_h264_cabac_tables + H264_MLPS_STATE_OFFSET; +static uint8_t * const ff_h264_last_coeff_flag_offset_8x8 = ff_h264_cabac_tables + H264_LAST_COEFF_FLAG_OFFSET_8x8_OFFSET; static void refill(CABACContext *c){ #if CABAC_BITS == 16 |