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monitord / lame-3.97 / libmp3lame / .svn / text-base / quantize_pvt.h.svn-base
@root root on 23 Jan 2012 4 KB Migration from SVN revision 455
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  1. /*
  2.  *	quantize_pvt include file
  3.  *
  4.  *	Copyright (c) 1999 Takehiro TOMINAGA
  5.  *
  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.
  10.  *
  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.
  15.  *
  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.
  20.  */
  21.  
  22. #ifndef LAME_QUANTIZE_PVT_H
  23. #define LAME_QUANTIZE_PVT_H
  24.  
  25. #include "l3side.h"
  26. #define IXMAX_VAL 8206  /* ix always <= 8191+15.    see count_bits() */
  27.  
  28. /* buggy Winamp decoder cannot handle values > 8191 */
  29. /* #define IXMAX_VAL 8191 */
  30.  
  31. #define PRECALC_SIZE (IXMAX_VAL+2)
  32.  
  33.  
  34. extern const int nr_of_sfb_block[6][3][4];
  35. extern const int pretab[SBMAX_l];
  36. extern const int slen1_tab[16];
  37. extern const int slen2_tab[16];
  38.  
  39. extern const scalefac_struct sfBandIndex[9];
  40.  
  41. extern FLOAT pow43[PRECALC_SIZE];
  42. #ifdef TAKEHIRO_IEEE754_HACK
  43. extern FLOAT adj43asm[PRECALC_SIZE];
  44. #else
  45. extern FLOAT adj43[PRECALC_SIZE];
  46. #endif
  47.  
  48. #define Q_MAX (256+1)
  49. #define Q_MAX2 116 /* minimum possible number of
  50. 		      -cod_info->global_gain
  51. 		      + ((scalefac[] + (cod_info->preflag ? pretab[sfb] : 0))
  52. 		      << (cod_info->scalefac_scale + 1))
  53. 		      + cod_info->subblock_gain[cod_info->window[sfb]] * 8;
  54.  
  55. 		      for long block, 0+((15+3)<<2) = 18*4 = 72
  56. 		      for short block, 0+(15<<2)+7*8 = 15*4+56 = 116
  57. 		   */
  58.  
  59. extern FLOAT pow20[Q_MAX+Q_MAX2+1];
  60. extern FLOAT ipow20[Q_MAX];
  61. extern FLOAT iipow20[Q_MAX2+1];
  62.  
  63. typedef struct calc_noise_result_t {
  64.     FLOAT  over_noise;      /* sum of quantization noise > masking */
  65.     FLOAT  tot_noise;       /* sum of all quantization noise */
  66.     FLOAT  max_noise;       /* max quantization noise */
  67.     int    over_count;      /* number of quantization noise > masking */
  68.     int    over_SSD;       /* SSD-like cost of distorted bands */
  69.     int    bits;
  70. } calc_noise_result;
  71.  
  72.  
  73. /**
  74. * allows re-use of previously
  75. * computed noise values
  76. */
  77. typedef struct calc_noise_data_t {
  78.     int global_gain;
  79.     int sfb_count1;
  80.     int step[39];
  81.     FLOAT noise[39];
  82.     FLOAT noise_log[39];
  83. } calc_noise_data;
  84.  
  85.  
  86. int     on_pe (lame_global_flags *gfp, FLOAT pe[2][2], III_side_info_t * l3_side,
  87.                int targ_bits[2], int mean_bits, int gr, int cbr);
  88.  
  89. void    reduce_side (int targ_bits[2], FLOAT ms_ener_ratio, int mean_bits,
  90.                      int max_bits);
  91.  
  92.  
  93. int     bin_search_StepSize (lame_internal_flags * const gfc, gr_info * const cod_info,
  94.                              int desired_rate, const int ch,
  95.                              const FLOAT xrpow[576]);
  96.  
  97. void    iteration_init (lame_global_flags *gfp);
  98.  
  99.  
  100. int     calc_xmin (lame_global_flags *gfp,
  101.                     const III_psy_ratio * const ratio,
  102.                     gr_info * const cod_info,
  103.                     FLOAT * l3_xmin);
  104.  
  105. int     calc_noise (const lame_internal_flags * const gfc,
  106.                     const gr_info * const cod_info,
  107.                     const FLOAT * l3_xmin,
  108.                     FLOAT * distort,
  109. 		            calc_noise_result * const res,
  110.                     calc_noise_data * prev_noise);
  111.  
  112. #if defined(HAVE_GTK)
  113. void    set_frame_pinfo (lame_global_flags *gfp,
  114.                          III_psy_ratio ratio[2][2]);
  115. #endif
  116.  
  117.  
  118.  
  119.  
  120. /* takehiro.c */
  121.  
  122. int     count_bits (lame_internal_flags * const gfc, const FLOAT * const xr,
  123. 		    gr_info * const cod_info, calc_noise_data* prev_noise);
  124. int     noquant_count_bits (lame_internal_flags * const gfc,
  125. 			    gr_info * const cod_info, calc_noise_data* prev_noise);
  126.  
  127.  
  128. void    best_huffman_divide (const lame_internal_flags * const gfc, 
  129.                              gr_info * const cod_info);
  130.  
  131. void    best_scalefac_store (const lame_internal_flags * gfc, const int gr, const int ch,
  132.                              III_side_info_t * const l3_side);
  133.  
  134. int     scale_bitcount (gr_info * const cod_info);
  135. int     scale_bitcount_lsf (const lame_internal_flags *gfp,
  136.                             gr_info * const cod_info);
  137.  
  138. void    huffman_init (lame_internal_flags * const gfc);
  139.  
  140. void    quantize_init (lame_internal_flags * const gfc);
  141.  
  142. void    init_xrpow_core_init (lame_internal_flags * const gfc);
  143.  
  144. FLOAT athAdjust( FLOAT a, FLOAT x, FLOAT athFloor );
  145.  
  146. #define LARGE_BITS 100000
  147.  
  148. #endif /* LAME_QUANTIZE_PVT_H */
  149.