X-Git-Url: https://git.pterodactylus.net/?a=blobdiff_plain;f=synfig-core%2Ftags%2Fsynfig_0_61_04%2Fsynfig-core%2Fsrc%2Fmodules%2Fmod_libavcodec%2Flibavcodec%2Fmpegaudiotab.h;fp=synfig-core%2Ftags%2Fsynfig_0_61_04%2Fsynfig-core%2Fsrc%2Fmodules%2Fmod_libavcodec%2Flibavcodec%2Fmpegaudiotab.h;h=bec932f20806e39d007d9c58f639a88d8cc4a546;hb=f64373f72487d6aa502d9bde985b8a2d5519f099;hp=0000000000000000000000000000000000000000;hpb=ad81c2528eb79c7500e65fd15a9f66375f75d121;p=synfig.git diff --git a/synfig-core/tags/synfig_0_61_04/synfig-core/src/modules/mod_libavcodec/libavcodec/mpegaudiotab.h b/synfig-core/tags/synfig_0_61_04/synfig-core/src/modules/mod_libavcodec/libavcodec/mpegaudiotab.h new file mode 100644 index 0000000..bec932f --- /dev/null +++ b/synfig-core/tags/synfig_0_61_04/synfig-core/src/modules/mod_libavcodec/libavcodec/mpegaudiotab.h @@ -0,0 +1,98 @@ +/* + * mpeg audio layer 2 tables. Most of them come from the mpeg audio + * specification. + * + * Copyright (c) 2000, 2001 Fabrice Bellard. + * + * The licence of this code is contained in file LICENCE found in the + * same archive + */ + +/** + * @file mpegaudiotab.h + * mpeg audio layer 2 tables. + * Most of them come from the mpeg audio specification. + */ + +#define SQRT2 1.41421356237309514547 + +static const int costab32[30] = { + FIX(0.54119610014619701222), + FIX(1.3065629648763763537), + + FIX(0.50979557910415917998), + FIX(2.5629154477415054814), + FIX(0.89997622313641556513), + FIX(0.60134488693504528634), + + FIX(0.5024192861881556782), + FIX(5.1011486186891552563), + FIX(0.78815462345125020249), + FIX(0.64682178335999007679), + FIX(0.56694403481635768927), + FIX(1.0606776859903470633), + FIX(1.7224470982383341955), + FIX(0.52249861493968885462), + + FIX(10.19000812354803287), + FIX(0.674808341455005678), + FIX(1.1694399334328846596), + FIX(0.53104259108978413284), + FIX(2.0577810099534108446), + FIX(0.58293496820613388554), + FIX(0.83934964541552681272), + FIX(0.50547095989754364798), + FIX(3.4076084184687189804), + FIX(0.62250412303566482475), + FIX(0.97256823786196078263), + FIX(0.51544730992262455249), + FIX(1.4841646163141661852), + FIX(0.5531038960344445421), + FIX(0.74453627100229857749), + FIX(0.5006029982351962726), +}; + +static const int bitinv32[32] = { + 0, 16, 8, 24, 4, 20, 12, 28, + 2, 18, 10, 26, 6, 22, 14, 30, + 1, 17, 9, 25, 5, 21, 13, 29, + 3, 19, 11, 27, 7, 23, 15, 31 +}; + + +static int16_t filter_bank[512]; + +static int scale_factor_table[64]; +#ifdef USE_FLOATS +static float scale_factor_inv_table[64]; +#else +static int8_t scale_factor_shift[64]; +static unsigned short scale_factor_mult[64]; +#endif +static unsigned char scale_diff_table[128]; + +/* total number of bits per allocation group */ +static unsigned short total_quant_bits[17]; + +/* signal to noise ratio of each quantification step (could be + computed from quant_steps[]). The values are dB multiplied by 10 +*/ +static unsigned short quant_snr[17] = { + 70, 110, 160, 208, + 253, 316, 378, 439, + 499, 559, 620, 680, + 740, 800, 861, 920, + 980 +}; + +/* fixed psycho acoustic model. ValueBases of SNR taken from the 'toolame' + project */ +static const float fixed_smr[SBLIMIT] = { + 30, 17, 16, 10, 3, 12, 8, 2.5, + 5, 5, 6, 6, 5, 6, 10, 6, + -4, -10, -21, -30, -42, -55, -68, -75, + -75, -75, -75, -75, -91, -107, -110, -108 +}; + +static const unsigned char nb_scale_factors[4] = { 3, 2, 1, 2 }; +