mirror of
https://github.com/cookiengineer/audacity
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5e0efd1a25
Using LAME 3.10 Windows project files substantially changed from original, and included into audacity solution.
129 lines
4.2 KiB
C
129 lines
4.2 KiB
C
/*
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* quantize_pvt include file
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*
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* Copyright (c) 1999 Takehiro TOMINAGA
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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#ifndef LAME_QUANTIZE_PVT_H
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#define LAME_QUANTIZE_PVT_H
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#define IXMAX_VAL 8206 /* ix always <= 8191+15. see count_bits() */
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/* buggy Winamp decoder cannot handle values > 8191 */
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/* #define IXMAX_VAL 8191 */
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#define PRECALC_SIZE (IXMAX_VAL+2)
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extern const int nr_of_sfb_block[6][3][4];
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extern const int pretab[SBMAX_l];
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extern const int slen1_tab[16];
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extern const int slen2_tab[16];
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extern const scalefac_struct sfBandIndex[9];
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extern FLOAT pow43[PRECALC_SIZE];
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#ifdef TAKEHIRO_IEEE754_HACK
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extern FLOAT adj43asm[PRECALC_SIZE];
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#else
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extern FLOAT adj43[PRECALC_SIZE];
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#endif
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#define Q_MAX (256+1)
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#define Q_MAX2 116 /* minimum possible number of
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-cod_info->global_gain
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+ ((scalefac[] + (cod_info->preflag ? pretab[sfb] : 0))
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<< (cod_info->scalefac_scale + 1))
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+ cod_info->subblock_gain[cod_info->window[sfb]] * 8;
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for long block, 0+((15+3)<<2) = 18*4 = 72
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for short block, 0+(15<<2)+7*8 = 15*4+56 = 116
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*/
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extern FLOAT pow20[Q_MAX + Q_MAX2 + 1];
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extern FLOAT ipow20[Q_MAX];
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typedef struct calc_noise_result_t {
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FLOAT over_noise; /* sum of quantization noise > masking */
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FLOAT tot_noise; /* sum of all quantization noise */
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FLOAT max_noise; /* max quantization noise */
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int over_count; /* number of quantization noise > masking */
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int over_SSD; /* SSD-like cost of distorted bands */
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int bits;
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} calc_noise_result;
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/**
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* allows re-use of previously
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* computed noise values
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*/
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typedef struct calc_noise_data_t {
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int global_gain;
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int sfb_count1;
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int step[39];
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FLOAT noise[39];
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FLOAT noise_log[39];
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} calc_noise_data;
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int on_pe(lame_internal_flags * gfc, const FLOAT pe[2][2],
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int targ_bits[2], int mean_bits, int gr, int cbr);
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void reduce_side(int targ_bits[2], FLOAT ms_ener_ratio, int mean_bits, int max_bits);
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void iteration_init(lame_internal_flags * gfc);
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int calc_xmin(lame_internal_flags const *gfc,
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III_psy_ratio const *const ratio, gr_info * const cod_info, FLOAT * l3_xmin);
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int calc_noise(const gr_info * const cod_info,
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const FLOAT * l3_xmin,
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FLOAT * distort, calc_noise_result * const res, calc_noise_data * prev_noise);
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void set_frame_pinfo(lame_internal_flags * gfc, const III_psy_ratio ratio[2][2]);
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/* takehiro.c */
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int count_bits(lame_internal_flags const *const gfc, const FLOAT * const xr,
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gr_info * const cod_info, calc_noise_data * prev_noise);
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int noquant_count_bits(lame_internal_flags const *const gfc,
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gr_info * const cod_info, calc_noise_data * prev_noise);
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void best_huffman_divide(const lame_internal_flags * const gfc, gr_info * const cod_info);
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void best_scalefac_store(const lame_internal_flags * gfc, const int gr, const int ch,
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III_side_info_t * const l3_side);
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int scale_bitcount(const lame_internal_flags * gfc, gr_info * cod_info);
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void huffman_init(lame_internal_flags * const gfc);
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void init_xrpow_core_init(lame_internal_flags * const gfc);
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FLOAT athAdjust(FLOAT a, FLOAT x, FLOAT athFloor, float ATHfixpoint);
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#define LARGE_BITS 100000
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#endif /* LAME_QUANTIZE_PVT_H */
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