2 * quantize_pvt include file
4 * Copyright (c) 1999 Takehiro TOMINAGA
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Library General Public
8 * License as published by the Free Software Foundation; either
9 * version 2 of the License, or (at your option) any later version.
11 * This library is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Library General Public License for more details.
16 * You should have received a copy of the GNU Library General Public
17 * License along with this library; if not, write to the
18 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
19 * Boston, MA 02111-1307, USA.
22 #ifndef LAME_QUANTIZE_PVT_H
23 #define LAME_QUANTIZE_PVT_H
25 #define IXMAX_VAL 8206 /* ix always <= 8191+15. see count_bits() */
27 /* buggy Winamp decoder cannot handle values > 8191 */
28 /* #define IXMAX_VAL 8191 */
30 #define PRECALC_SIZE (IXMAX_VAL+2)
33 extern const int nr_of_sfb_block[6][3][4];
34 extern const int pretab[SBMAX_l];
35 extern const int slen1_tab[16];
36 extern const int slen2_tab[16];
38 extern const scalefac_struct sfBandIndex[9];
40 extern FLOAT pow43[PRECALC_SIZE];
41 #ifdef TAKEHIRO_IEEE754_HACK
42 extern FLOAT adj43asm[PRECALC_SIZE];
44 extern FLOAT adj43[PRECALC_SIZE];
48 #define Q_MAX2 116 /* minimum possible number of
49 -cod_info->global_gain
50 + ((scalefac[] + (cod_info->preflag ? pretab[sfb] : 0))
51 << (cod_info->scalefac_scale + 1))
52 + cod_info->subblock_gain[cod_info->window[sfb]] * 8;
54 for long block, 0+((15+3)<<2) = 18*4 = 72
55 for short block, 0+(15<<2)+7*8 = 15*4+56 = 116
58 extern FLOAT pow20[Q_MAX + Q_MAX2 + 1];
59 extern FLOAT ipow20[Q_MAX];
61 typedef struct calc_noise_result_t {
62 FLOAT over_noise; /* sum of quantization noise > masking */
63 FLOAT tot_noise; /* sum of all quantization noise */
64 FLOAT max_noise; /* max quantization noise */
65 int over_count; /* number of quantization noise > masking */
66 int over_SSD; /* SSD-like cost of distorted bands */
72 * allows re-use of previously
73 * computed noise values
75 typedef struct calc_noise_data_t {
84 int on_pe(lame_internal_flags * gfc, const FLOAT pe[2][2],
85 int targ_bits[2], int mean_bits, int gr, int cbr);
87 void reduce_side(int targ_bits[2], FLOAT ms_ener_ratio, int mean_bits, int max_bits);
90 void iteration_init(lame_internal_flags * gfc);
93 int calc_xmin(lame_internal_flags const *gfc,
94 III_psy_ratio const *const ratio, gr_info * const cod_info, FLOAT * l3_xmin);
96 int calc_noise(const gr_info * const cod_info,
97 const FLOAT * l3_xmin,
98 FLOAT * distort, calc_noise_result * const res, calc_noise_data * prev_noise);
100 void set_frame_pinfo(lame_internal_flags * gfc, const III_psy_ratio ratio[2][2]);
107 int count_bits(lame_internal_flags const *const gfc, const FLOAT * const xr,
108 gr_info * const cod_info, calc_noise_data * prev_noise);
109 int noquant_count_bits(lame_internal_flags const *const gfc,
110 gr_info * const cod_info, calc_noise_data * prev_noise);
113 void best_huffman_divide(const lame_internal_flags * const gfc, gr_info * const cod_info);
115 void best_scalefac_store(const lame_internal_flags * gfc, const int gr, const int ch,
116 III_side_info_t * const l3_side);
118 int scale_bitcount(const lame_internal_flags * gfc, gr_info * cod_info);
120 void huffman_init(lame_internal_flags * const gfc);
122 void init_xrpow_core_init(lame_internal_flags * const gfc);
124 FLOAT athAdjust(FLOAT a, FLOAT x, FLOAT athFloor, float ATHfixpoint);
126 #define LARGE_BITS 100000
128 #endif /* LAME_QUANTIZE_PVT_H */