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Diffstat (limited to 'vorbis/lib/psy.h')
| -rw-r--r-- | vorbis/lib/psy.h | 153 |
1 files changed, 153 insertions, 0 deletions
diff --git a/vorbis/lib/psy.h b/vorbis/lib/psy.h new file mode 100644 index 0000000..ab2534d --- /dev/null +++ b/vorbis/lib/psy.h @@ -0,0 +1,153 @@ +/******************************************************************** + * * + * THIS FILE IS PART OF THE OggVorbis SOFTWARE CODEC SOURCE CODE. * + * USE, DISTRIBUTION AND REPRODUCTION OF THIS LIBRARY SOURCE IS * + * GOVERNED BY A BSD-STYLE SOURCE LICENSE INCLUDED WITH THIS SOURCE * + * IN 'COPYING'. PLEASE READ THESE TERMS BEFORE DISTRIBUTING. * + * * + * THE OggVorbis SOURCE CODE IS (C) COPYRIGHT 1994-2009 * + * by the Xiph.Org Foundation http://www.xiph.org/ * + * * + ******************************************************************** + + function: random psychoacoustics (not including preecho) + + ********************************************************************/ + +#ifndef _V_PSY_H_ +#define _V_PSY_H_ +#include "smallft.h" + +#include "backends.h" +#include "envelope.h" + +#ifndef EHMER_MAX +#define EHMER_MAX 56 +#endif + +/* psychoacoustic setup ********************************************/ +#define P_BANDS 17 /* 62Hz to 16kHz */ +#define P_LEVELS 8 /* 30dB to 100dB */ +#define P_LEVEL_0 30. /* 30 dB */ +#define P_NOISECURVES 3 + +#define NOISE_COMPAND_LEVELS 40 +typedef struct vorbis_info_psy{ + int blockflag; + + float ath_adjatt; + float ath_maxatt; + + float tone_masteratt[P_NOISECURVES]; + float tone_centerboost; + float tone_decay; + float tone_abs_limit; + float toneatt[P_BANDS]; + + int noisemaskp; + float noisemaxsupp; + float noisewindowlo; + float noisewindowhi; + int noisewindowlomin; + int noisewindowhimin; + int noisewindowfixed; + float noiseoff[P_NOISECURVES][P_BANDS]; + float noisecompand[NOISE_COMPAND_LEVELS]; + + float max_curve_dB; + + int normal_p; + int normal_start; + int normal_partition; + double normal_thresh; +} vorbis_info_psy; + +typedef struct{ + int eighth_octave_lines; + + /* for block long/short tuning; encode only */ + float preecho_thresh[VE_BANDS]; + float postecho_thresh[VE_BANDS]; + float stretch_penalty; + float preecho_minenergy; + + float ampmax_att_per_sec; + + /* channel coupling config */ + int coupling_pkHz[PACKETBLOBS]; + int coupling_pointlimit[2][PACKETBLOBS]; + int coupling_prepointamp[PACKETBLOBS]; + int coupling_postpointamp[PACKETBLOBS]; + int sliding_lowpass[2][PACKETBLOBS]; + +} vorbis_info_psy_global; + +typedef struct { + float ampmax; + int channels; + + vorbis_info_psy_global *gi; + int coupling_pointlimit[2][P_NOISECURVES]; +} vorbis_look_psy_global; + + +typedef struct { + int n; + struct vorbis_info_psy *vi; + + float ***tonecurves; + float **noiseoffset; + + float *ath; + long *octave; /* in n.ocshift format */ + long *bark; + + long firstoc; + long shiftoc; + int eighth_octave_lines; /* power of two, please */ + int total_octave_lines; + long rate; /* cache it */ + + float m_val; /* Masking compensation value */ + +} vorbis_look_psy; + +extern void _vp_psy_init(vorbis_look_psy *p,vorbis_info_psy *vi, + vorbis_info_psy_global *gi,int n,long rate); +extern void _vp_psy_clear(vorbis_look_psy *p); +extern void *_vi_psy_dup(void *source); + +extern void _vi_psy_free(vorbis_info_psy *i); +extern vorbis_info_psy *_vi_psy_copy(vorbis_info_psy *i); + +extern void _vp_noisemask(vorbis_look_psy *p, + float *logmdct, + float *logmask); + +extern void _vp_tonemask(vorbis_look_psy *p, + float *logfft, + float *logmask, + float global_specmax, + float local_specmax); + +extern void _vp_offset_and_mix(vorbis_look_psy *p, + float *noise, + float *tone, + int offset_select, + float *logmask, + float *mdct, + float *logmdct); + +extern float _vp_ampmax_decay(float amp,vorbis_dsp_state *vd); + +extern void _vp_couple_quantize_normalize(int blobno, + vorbis_info_psy_global *g, + vorbis_look_psy *p, + vorbis_info_mapping0 *vi, + float **mdct, + int **iwork, + int *nonzero, + int sliding_lowpass, + int ch); + +#endif |