mirror of
https://github.com/cookiengineer/audacity
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155 lines
4.6 KiB
C
155 lines
4.6 KiB
C
/********************************************************************
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* *
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* THIS FILE IS PART OF THE OggVorbis SOFTWARE CODEC SOURCE CODE. *
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* USE, DISTRIBUTION AND REPRODUCTION OF THIS LIBRARY SOURCE IS *
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* GOVERNED BY A BSD-STYLE SOURCE LICENSE INCLUDED WITH THIS SOURCE *
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* IN 'COPYING'. PLEASE READ THESE TERMS BEFORE DISTRIBUTING. *
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* *
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* THE OggVorbis SOURCE CODE IS (C) COPYRIGHT 1994-2009 *
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* by the Xiph.Org Foundation http://www.xiph.org/ *
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* *
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********************************************************************
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function: random psychoacoustics (not including preecho)
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last mod: $Id: psy.h 16946 2010-03-03 16:12:40Z xiphmont $
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********************************************************************/
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#ifndef _V_PSY_H_
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#define _V_PSY_H_
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#include "smallft.h"
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#include "backends.h"
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#include "envelope.h"
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#ifndef EHMER_MAX
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#define EHMER_MAX 56
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#endif
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/* psychoacoustic setup ********************************************/
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#define P_BANDS 17 /* 62Hz to 16kHz */
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#define P_LEVELS 8 /* 30dB to 100dB */
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#define P_LEVEL_0 30. /* 30 dB */
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#define P_NOISECURVES 3
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#define NOISE_COMPAND_LEVELS 40
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typedef struct vorbis_info_psy{
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int blockflag;
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float ath_adjatt;
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float ath_maxatt;
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float tone_masteratt[P_NOISECURVES];
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float tone_centerboost;
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float tone_decay;
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float tone_abs_limit;
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float toneatt[P_BANDS];
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int noisemaskp;
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float noisemaxsupp;
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float noisewindowlo;
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float noisewindowhi;
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int noisewindowlomin;
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int noisewindowhimin;
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int noisewindowfixed;
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float noiseoff[P_NOISECURVES][P_BANDS];
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float noisecompand[NOISE_COMPAND_LEVELS];
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float max_curve_dB;
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int normal_p;
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int normal_start;
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int normal_partition;
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double normal_thresh;
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} vorbis_info_psy;
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typedef struct{
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int eighth_octave_lines;
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/* for block long/short tuning; encode only */
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float preecho_thresh[VE_BANDS];
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float postecho_thresh[VE_BANDS];
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float stretch_penalty;
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float preecho_minenergy;
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float ampmax_att_per_sec;
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/* channel coupling config */
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int coupling_pkHz[PACKETBLOBS];
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int coupling_pointlimit[2][PACKETBLOBS];
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int coupling_prepointamp[PACKETBLOBS];
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int coupling_postpointamp[PACKETBLOBS];
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int sliding_lowpass[2][PACKETBLOBS];
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} vorbis_info_psy_global;
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typedef struct {
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float ampmax;
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int channels;
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vorbis_info_psy_global *gi;
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int coupling_pointlimit[2][P_NOISECURVES];
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} vorbis_look_psy_global;
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typedef struct {
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int n;
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struct vorbis_info_psy *vi;
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float ***tonecurves;
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float **noiseoffset;
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float *ath;
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long *octave; /* in n.ocshift format */
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long *bark;
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long firstoc;
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long shiftoc;
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int eighth_octave_lines; /* power of two, please */
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int total_octave_lines;
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long rate; /* cache it */
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float m_val; /* Masking compensation value */
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} vorbis_look_psy;
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extern void _vp_psy_init(vorbis_look_psy *p,vorbis_info_psy *vi,
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vorbis_info_psy_global *gi,int n,long rate);
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extern void _vp_psy_clear(vorbis_look_psy *p);
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extern void *_vi_psy_dup(void *source);
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extern void _vi_psy_free(vorbis_info_psy *i);
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extern vorbis_info_psy *_vi_psy_copy(vorbis_info_psy *i);
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extern void _vp_noisemask(vorbis_look_psy *p,
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float *logmdct,
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float *logmask);
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extern void _vp_tonemask(vorbis_look_psy *p,
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float *logfft,
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float *logmask,
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float global_specmax,
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float local_specmax);
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extern void _vp_offset_and_mix(vorbis_look_psy *p,
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float *noise,
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float *tone,
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int offset_select,
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float *logmask,
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float *mdct,
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float *logmdct);
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extern float _vp_ampmax_decay(float amp,vorbis_dsp_state *vd);
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extern void _vp_couple_quantize_normalize(int blobno,
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vorbis_info_psy_global *g,
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vorbis_look_psy *p,
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vorbis_info_mapping0 *vi,
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float **mdct,
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int **iwork,
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int *nonzero,
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int sliding_lowpass,
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int ch);
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#endif
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