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| author | Rostislav Pehlivanov <atomnuker@gmail.com> | 2015-08-29 06:07:12 +0100 |
|---|---|---|
| committer | Rostislav Pehlivanov <atomnuker@gmail.com> | 2015-08-29 06:07:12 +0100 |
| commit | f55cc579115e4bcfe26eb05ecaa1c823343e9e1e (patch) | |
| tree | c2bc04b477c2aa405f3f832e036d4e0f1dee2469 /libavcodec/aactab.h | |
| parent | 91f1115a0e027074c90bac6e57c2d0f4fe9efe8c (diff) | |
| download | ffmpeg-f55cc579115e4bcfe26eb05ecaa1c823343e9e1e.tar.gz | |
aac: move the TNS tables from aacdectab to the shared aactab
This commit simply moves the TNS tables to a more appropriate
aactab.h since then they can be accessed by both the decoder
and encoder.
The encoder _shouldn't_ normally need the tables since the
specs describe a specific quantization process, but the exact
reason for this can be seen in the TNS commit following.
Signed-off-by: Rostislav Pehlivanov <atomnuker@gmail.com>
Diffstat (limited to 'libavcodec/aactab.h')
| -rw-r--r-- | libavcodec/aactab.h | 35 |
1 files changed, 35 insertions, 0 deletions
diff --git a/libavcodec/aactab.h b/libavcodec/aactab.h index c115b05d65..9f333801e9 100644 --- a/libavcodec/aactab.h +++ b/libavcodec/aactab.h @@ -41,6 +41,41 @@ * encoder. */ +/* @name tns_tmp2_map + * Tables of the tmp2[] arrays of LPC coefficients used for TNS. + * The suffix _M_N[] indicate the values of coef_compress and coef_res + * respectively. + * @{ + */ +static const INTFLOAT tns_tmp2_map_1_3[4] = { + Q31(0.00000000f), Q31(-0.43388373f), Q31(0.64278758f), Q31(0.34202015f), +}; + +static const INTFLOAT tns_tmp2_map_0_3[8] = { + Q31(0.00000000f), Q31(-0.43388373f), Q31(-0.78183150f), Q31(-0.97492790f), + Q31(0.98480773f), Q31( 0.86602539f), Q31( 0.64278758f), Q31( 0.34202015f), +}; + +static const INTFLOAT tns_tmp2_map_1_4[8] = { + Q31(0.00000000f), Q31(-0.20791170f), Q31(-0.40673664f), Q31(-0.58778524f), + Q31(0.67369562f), Q31( 0.52643216f), Q31( 0.36124167f), Q31( 0.18374951f), +}; + +static const INTFLOAT tns_tmp2_map_0_4[16] = { + Q31( 0.00000000f), Q31(-0.20791170f), Q31(-0.40673664f), Q31(-0.58778524f), + Q31(-0.74314481f), Q31(-0.86602539f), Q31(-0.95105654f), Q31(-0.99452192f), + Q31( 0.99573416f), Q31( 0.96182561f), Q31( 0.89516330f), Q31( 0.79801720f), + Q31( 0.67369562f), Q31( 0.52643216f), Q31( 0.36124167f), Q31( 0.18374951f), +}; + +static const INTFLOAT * const tns_tmp2_map[4] = { + tns_tmp2_map_0_3, + tns_tmp2_map_0_4, + tns_tmp2_map_1_3, + tns_tmp2_map_1_4 +}; +// @} + /* @name window coefficients * @{ */ |