psy.h (4771B)
1 /******************************************************************** 2 * * 3 * THIS FILE IS PART OF THE OggVorbis SOFTWARE CODEC SOURCE CODE. * 4 * USE, DISTRIBUTION AND REPRODUCTION OF THIS LIBRARY SOURCE IS * 5 * GOVERNED BY A BSD-STYLE SOURCE LICENSE INCLUDED WITH THIS SOURCE * 6 * IN 'COPYING'. PLEASE READ THESE TERMS BEFORE DISTRIBUTING. * 7 * * 8 * THE OggVorbis SOURCE CODE IS (C) COPYRIGHT 1994-2002 * 9 * by the XIPHOPHORUS Company http://www.xiph.org/ * 10 * * 11 ******************************************************************** 12 13 function: random psychoacoustics (not including preecho) 14 last mod: $Id: psy.h 1919 2005-07-24 14:18:04Z baford $ 15 16 ********************************************************************/ 17 18 #ifndef _V_PSY_H_ 19 #define _V_PSY_H_ 20 #include "smallft.h" 21 22 #include "backends.h" 23 #include "envelope.h" 24 25 #ifndef EHMER_MAX 26 #define EHMER_MAX 56 27 #endif 28 29 /* psychoacoustic setup ********************************************/ 30 #define P_BANDS 17 /* 62Hz to 16kHz */ 31 #define P_LEVELS 8 /* 30dB to 100dB */ 32 #define P_LEVEL_0 30. /* 30 dB */ 33 #define P_NOISECURVES 3 34 35 #define NOISE_COMPAND_LEVELS 40 36 typedef struct vorbis_info_psy{ 37 int blockflag; 38 39 float ath_adjatt; 40 float ath_maxatt; 41 42 float tone_masteratt[P_NOISECURVES]; 43 float tone_centerboost; 44 float tone_decay; 45 float tone_abs_limit; 46 float toneatt[P_BANDS]; 47 48 int noisemaskp; 49 float noisemaxsupp; 50 float noisewindowlo; 51 float noisewindowhi; 52 int noisewindowlomin; 53 int noisewindowhimin; 54 int noisewindowfixed; 55 float noiseoff[P_NOISECURVES][P_BANDS]; 56 float noisecompand[NOISE_COMPAND_LEVELS]; 57 58 float max_curve_dB; 59 60 int normal_channel_p; 61 int normal_point_p; 62 int normal_start; 63 int normal_partition; 64 double normal_thresh; 65 } vorbis_info_psy; 66 67 typedef struct{ 68 int eighth_octave_lines; 69 70 /* for block long/short tuning; encode only */ 71 float preecho_thresh[VE_BANDS]; 72 float postecho_thresh[VE_BANDS]; 73 float stretch_penalty; 74 float preecho_minenergy; 75 76 float ampmax_att_per_sec; 77 78 /* channel coupling config */ 79 int coupling_pkHz[PACKETBLOBS]; 80 int coupling_pointlimit[2][PACKETBLOBS]; 81 int coupling_prepointamp[PACKETBLOBS]; 82 int coupling_postpointamp[PACKETBLOBS]; 83 int sliding_lowpass[2][PACKETBLOBS]; 84 85 } vorbis_info_psy_global; 86 87 typedef struct { 88 float ampmax; 89 int channels; 90 91 vorbis_info_psy_global *gi; 92 int coupling_pointlimit[2][P_NOISECURVES]; 93 } vorbis_look_psy_global; 94 95 96 typedef struct { 97 int n; 98 struct vorbis_info_psy *vi; 99 100 float ***tonecurves; 101 float **noiseoffset; 102 103 float *ath; 104 long *octave; /* in n.ocshift format */ 105 long *bark; 106 107 long firstoc; 108 long shiftoc; 109 int eighth_octave_lines; /* power of two, please */ 110 int total_octave_lines; 111 long rate; /* cache it */ 112 } vorbis_look_psy; 113 114 extern void _vp_psy_init(vorbis_look_psy *p,vorbis_info_psy *vi, 115 vorbis_info_psy_global *gi,int n,long rate); 116 extern void _vp_psy_clear(vorbis_look_psy *p); 117 extern void *_vi_psy_dup(void *source); 118 119 extern void _vi_psy_free(vorbis_info_psy *i); 120 extern vorbis_info_psy *_vi_psy_copy(vorbis_info_psy *i); 121 122 extern void _vp_remove_floor(vorbis_look_psy *p, 123 float *mdct, 124 int *icodedflr, 125 float *residue, 126 int sliding_lowpass); 127 128 extern void _vp_noisemask(vorbis_look_psy *p, 129 float *logmdct, 130 float *logmask); 131 132 extern void _vp_tonemask(vorbis_look_psy *p, 133 float *logfft, 134 float *logmask, 135 float global_specmax, 136 float local_specmax); 137 138 extern void _vp_offset_and_mix(vorbis_look_psy *p, 139 float *noise, 140 float *tone, 141 int offset_select, 142 float *logmask); 143 144 extern float _vp_ampmax_decay(float amp,vorbis_dsp_state *vd); 145 146 extern float **_vp_quantize_couple_memo(vorbis_block *vb, 147 vorbis_info_psy_global *g, 148 vorbis_look_psy *p, 149 vorbis_info_mapping0 *vi, 150 float **mdct); 151 152 extern void _vp_couple(int blobno, 153 vorbis_info_psy_global *g, 154 vorbis_look_psy *p, 155 vorbis_info_mapping0 *vi, 156 float **res, 157 float **mag_memo, 158 int **mag_sort, 159 int **ifloor, 160 int *nonzero, 161 int sliding_lowpass); 162 163 extern void _vp_noise_normalize(vorbis_look_psy *p, 164 float *in,float *out,int *sortedindex); 165 166 extern void _vp_noise_normalize_sort(vorbis_look_psy *p, 167 float *magnitudes,int *sortedindex); 168 169 extern int **_vp_quantize_couple_sort(vorbis_block *vb, 170 vorbis_look_psy *p, 171 vorbis_info_mapping0 *vi, 172 float **mags); 173 174 #endif 175