mirror of
https://github.com/cookiengineer/audacity
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525 lines
16 KiB
C
525 lines
16 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 1994-2007 *
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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: simple utility that runs audio through the psychoacoustics
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without encoding
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last mod: $Id: psytune.c 16037 2009-05-26 21:10:58Z xiphmont $
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********************************************************************/
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/* NB: this is dead code, retained purely for doc and reference value
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don't try to compile it */
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <math.h>
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#include "vorbis/codec.h"
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#include "codec_internal.h"
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#include "os.h"
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#include "misc.h"
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#include "psy.h"
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#include "mdct.h"
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#include "smallft.h"
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#include "window.h"
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#include "scales.h"
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#include "lpc.h"
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#include "lsp.h"
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#include "masking.h"
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#include "registry.h"
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static vorbis_info_psy_global _psy_set0G={
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0, /* decaydBpms */
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8, /* lines per eighth octave */
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/* thresh sample period, preecho clamp trigger threshhold, range, minenergy */
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256, {26.f,26.f,26.f,30.f}, {-90.f,-90.f,-90.f,-90.f}, -90.f,
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-6.f,
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0,
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0.,
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0.,
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};
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static vp_part _vp_part0[]={
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{ 1,9e10f, 9e10f, 1.f,9999.f},
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{ 9999, .75f, 9e10f, .5f,9999.f},
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/*{ 9999, 1.5f, 9e10f, .5f,9999.f},*/
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{ 18,9e10f, 9e10f, .5f, 30.f},
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{ 9999,9e10f, 9e10f, .5f, 30.f}
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};
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static vp_couple _vp_couple0[]={
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{ 1, {9e10f,9e10f,0}, { 0.f, 0.f,0}, { 0.f, 0.f,0}, {0.f,0.f,0}},
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{ 18, {9e10f,9e10f,0}, { 0.f, 0.f,0}, { 0.f, 0.f,0}, {0.f,0.f,0}},
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{ 9999, {9e10f,9e10f,0}, { 0.f, 9e10f,0}, { 0.f,22.f,1}, {0.f,0.f,0}}
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};
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static vorbis_info_psy _psy_set0={
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ATH_Bark_dB_lineaggressive,
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-100.f,
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-140.f,
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6.f, /* floor master att */
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/* 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 */
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/* x: 63 88 125 175 250 350 500 700 1k 1.4k 2k 2.8k 4k 5.6k 8k 11.5k 16k Hz */
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/* y: 0 10 20 30 40 50 60 70 80 90 100 dB */
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1, /* tonemaskp */
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0.f, /* tone master att */
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/* 0 10 20 30 40 50 60 70 80 90 100 */
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{
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{-999.f,-999.f,-999.f,-999.f,-999.f,-999.f,-999.f,-999.f,-999.f,-999.f,-999.f}, /*63*/
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{-999.f,-999.f,-999.f,-999.f,-999.f,-999.f,-999.f,-999.f,-999.f,-999.f,-999.f}, /*88*/
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{-999.f,-999.f,-999.f,-999.f,-999.f,-999.f,-999.f,-999.f,-999.f,-999.f,-999.f}, /*125*/
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{-30.f,-30.f,-35.f,-40.f,-40.f,-50.f,-60.f,-70.f,-80.f,-90.f,-100.f}, /*175*/
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{-30.f,-30.f,-35.f,-40.f,-40.f,-50.f,-60.f,-70.f,-80.f,-90.f,-100.f}, /*250*/
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{-30.f,-30.f,-35.f,-40.f,-40.f,-50.f,-60.f,-70.f,-80.f,-90.f,-100.f}, /*350*/
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{-30.f,-30.f,-35.f,-40.f,-40.f,-50.f,-60.f,-70.f,-80.f,-90.f,-100.f}, /*500*/
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{-30.f,-30.f,-35.f,-40.f,-40.f,-50.f,-60.f,-70.f,-80.f,-90.f,-100.f}, /*700*/
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{-30.f,-30.f,-35.f,-40.f,-40.f,-50.f,-60.f,-70.f,-80.f,-90.f,-100.f}, /*1000*/
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{-30.f,-30.f,-35.f,-40.f,-40.f,-50.f,-60.f,-70.f,-80.f,-90.f,-100.f}, /*1400*/
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{-40.f,-40.f,-40.f,-40.f,-40.f,-50.f,-60.f,-70.f,-80.f,-90.f,-100.f}, /*2000*/
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{-40.f,-40.f,-40.f,-40.f,-40.f,-50.f,-60.f,-70.f,-80.f,-90.f,-100.f}, /*2800*/
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{-40.f,-40.f,-40.f,-40.f,-40.f,-50.f,-60.f,-70.f,-80.f,-90.f,-100.f}, /*4000*/
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{-30.f,-35.f,-35.f,-40.f,-40.f,-50.f,-60.f,-70.f,-80.f,-90.f,-100.f}, /*5600*/
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{-30.f,-30.f,-33.f,-35.f,-40.f,-50.f,-60.f,-70.f,-80.f,-90.f,-100.f}, /*8000*/
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{-30.f,-30.f,-33.f,-35.f,-40.f,-45.f,-50.f,-60.f,-70.f,-85.f,-100.f}, /*11500*/
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{-24.f,-24.f,-26.f,-32.f,-32.f,-42.f,-50.f,-60.f,-70.f,-85.f,-100.f}, /*16000*/
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},
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1,/* peakattp */
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{{-14.f,-20.f,-20.f,-20.f,-26.f,-32.f,-40.f,-40.f,-40.f,-40.f,-40.f},/*63*/
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{-14.f,-20.f,-20.f,-20.f,-26.f,-32.f,-40.f,-40.f,-40.f,-40.f,-40.f},/*88*/
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{-14.f,-20.f,-20.f,-20.f,-26.f,-32.f,-40.f,-40.f,-40.f,-40.f,-40.f},/*125*/
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{-14.f,-20.f,-20.f,-20.f,-26.f,-32.f,-40.f,-40.f,-40.f,-40.f,-40.f},/*175*/
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{-14.f,-20.f,-20.f,-20.f,-26.f,-32.f,-40.f,-40.f,-40.f,-40.f,-40.f},/*250*/
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{-14.f,-20.f,-20.f,-20.f,-26.f,-32.f,-40.f,-40.f,-40.f,-40.f,-40.f},/*350*/
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{-14.f,-20.f,-20.f,-20.f,-26.f,-32.f,-40.f,-40.f,-40.f,-40.f,-40.f},/*500*/
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{-14.f,-20.f,-20.f,-20.f,-26.f,-32.f,-40.f,-40.f,-40.f,-40.f,-40.f},/*700*/
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{-14.f,-20.f,-20.f,-20.f,-26.f,-32.f,-40.f,-40.f,-40.f,-40.f,-40.f},/*1000*/
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{-14.f,-20.f,-20.f,-20.f,-26.f,-32.f,-40.f,-40.f,-40.f,-40.f,-40.f},/*1400*/
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{-14.f,-20.f,-20.f,-20.f,-26.f,-32.f,-40.f,-40.f,-40.f,-40.f,-40.f},/*2000*/
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{-14.f,-20.f,-20.f,-20.f,-26.f,-32.f,-40.f,-40.f,-40.f,-40.f,-40.f},/*2800*/
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{-14.f,-20.f,-20.f,-20.f,-26.f,-32.f,-40.f,-40.f,-40.f,-40.f,-40.f},/*4000*/
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{-10.f,-12.f,-14.f,-16.f,-16.f,-20.f,-24.f,-30.f,-32.f,-40.f,-40.f},/*5600*/
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{-10.f,-12.f,-14.f,-16.f,-16.f,-20.f,-24.f,-30.f,-32.f,-40.f,-40.f},/*8000*/
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{-10.f,-10.f,-10.f,-12.f,-14.f,-18.f,-22.f,-28.f,-32.f,-40.f,-40.f},/*11500*/
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{-10.f,-10.f,-10.f,-12.f,-14.f,-18.f,-22.f,-28.f,-32.f,-40.f,-40.f},/*16000*/
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},
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1,/*noisemaskp */
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-10.f, /* suppress any noise curve over maxspec+n */
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.5f, /* low window */
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.5f, /* high window */
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10,
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10,
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25,
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{.000f, 0.f, /*63*/
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.000f, 0.f, /*88*/
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.000f, 0.f, /*125*/
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.000f, 0.f, /*175*/
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.000f, 0.f, /*250*/
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.000f, 0.f, /*350*/
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.000f, 0.f, /*500*/
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.000f, 0.f, /*700*/
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.000f, 0.f, /*1000*/
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.300f, 0.f, /*1400*/
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.300f, 0.f, /*2000*/
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.300f, 0.f, /*2800*/
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.500f, 0.f, /*4000*/
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.700f, 0.f, /*5600*/
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.850f, 0.f, /*8000*/
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.900f, 0.f, /*11500*/
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.900f, 1.f, /*16000*/
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},
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95.f, /* even decade + 5 is important; saves an rint() later in a
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tight loop) */
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-44.,
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32,
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_vp_part0,_vp_couple0
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};
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static vorbis_info_floor1 _floor_set0={1,
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{0},
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{32},
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{0},
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{0},
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{{-1}},
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2,
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{0,1024,
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88,31,243,
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14,54,143,460,
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6,3,10, 22,18,26, 41,36,47,
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69,61,78, 112,99,126, 185,162,211,
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329,282,387, 672,553,825
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},
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60,30,400,
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20,8,1,18.,
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20,600,
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960};
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static vorbis_info_mapping0 mapping_info={1,{0,1},{0},{0},{0},0, 1, {0},{1}};
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static codec_setup_info codec_setup0={ {0,0},
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1,1,1,1,1,0,1,
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{NULL},
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{0},{&mapping_info},
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{0},{NULL},
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{1},{&_floor_set0},
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{2},{NULL},
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{NULL},
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{&_psy_set0},
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&_psy_set0G};
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static int noisy=0;
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void analysis(char *base,int i,float *v,int n,int bark,int dB){
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if(noisy){
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int j;
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FILE *of;
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char buffer[80];
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sprintf(buffer,"%s_%d.m",base,i);
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of=fopen(buffer,"w");
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for(j=0;j<n;j++){
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if(dB && v[j]==0)
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fprintf(of,"\n\n");
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else{
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if(bark)
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fprintf(of,"%g ",toBARK(22050.f*j/n));
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else
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fprintf(of,"%g ",(float)j);
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if(dB){
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fprintf(of,"%g\n",todB(v+j));
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}else{
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fprintf(of,"%g\n",v[j]);
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}
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}
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}
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fclose(of);
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}
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}
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long frameno=0;
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/****************************************************************/
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int main(int argc,char *argv[]){
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int eos=0;
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float nonz=0.f;
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float acc=0.f;
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float tot=0.f;
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float ampmax=-9999,newmax;
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float local_ampmax[2];
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int framesize=2048;
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float ampmax_att_per_sec=-6.;
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float *pcm[2],*out[2],*window,*flr[2],*mask[2],*work[2];
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signed char *buffer,*buffer2;
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mdct_lookup m_look;
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drft_lookup f_look;
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vorbis_look_psy p_look;
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vorbis_look_psy_global *pg_look;
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vorbis_look_floor *floor_look;
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vorbis_info vi;
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long i,j,k;
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int ath=0;
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int decayp=0;
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argv++;
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while(*argv){
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if(*argv[0]=='-'){
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/* option */
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if(argv[0][1]=='v'){
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noisy=0;
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}
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}else
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if(*argv[0]=='+'){
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/* option */
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if(argv[0][1]=='v'){
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noisy=1;
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}
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}else
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framesize=atoi(argv[0]);
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argv++;
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}
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vi.channels=2;
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vi.codec_setup=&codec_setup0;
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pcm[0]=_ogg_malloc(framesize*sizeof(float));
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pcm[1]=_ogg_malloc(framesize*sizeof(float));
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out[0]=_ogg_calloc(framesize/2,sizeof(float));
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out[1]=_ogg_calloc(framesize/2,sizeof(float));
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work[0]=_ogg_calloc(framesize,sizeof(float));
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work[1]=_ogg_calloc(framesize,sizeof(float));
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flr[0]=_ogg_calloc(framesize/2,sizeof(float));
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flr[1]=_ogg_calloc(framesize/2,sizeof(float));
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buffer=_ogg_malloc(framesize*4);
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buffer2=buffer+framesize*2;
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window=_vorbis_window_create(0,framesize,framesize/2,framesize/2);
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mdct_init(&m_look,framesize);
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drft_init(&f_look,framesize);
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_vp_psy_init(&p_look,&_psy_set0,&_psy_set0G,framesize/2,44100);
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pg_look=_vp_global_look(&vi);
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floor_look=_floor_P[1]->look(NULL,NULL,&_floor_set0);
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/* we cheat on the WAV header; we just bypass 44 bytes and never
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verify that it matches 16bit/stereo/44.1kHz. */
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fread(buffer,1,44,stdin);
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fwrite(buffer,1,44,stdout);
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memset(buffer,0,framesize*2);
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analysis("window",0,window,framesize,0,0);
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fprintf(stderr,"Processing for frame size %d...\n",framesize);
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while(!eos){
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long bytes=fread(buffer2,1,framesize*2,stdin);
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if(bytes<framesize*2)
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memset(buffer2+bytes,0,framesize*2-bytes);
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if(bytes!=0){
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int nonzero[2];
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/* uninterleave samples */
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for(i=0;i<framesize;i++){
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pcm[0][i]=((buffer[i*4+1]<<8)|
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(0x00ff&(int)buffer[i*4]))/32768.f;
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pcm[1][i]=((buffer[i*4+3]<<8)|
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(0x00ff&(int)buffer[i*4+2]))/32768.f;
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}
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{
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float secs=framesize/44100.;
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ampmax+=secs*ampmax_att_per_sec;
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if(ampmax<-9999)ampmax=-9999;
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}
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for(i=0;i<2;i++){
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float scale=4.f/framesize;
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float *fft=work[i];
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float *mdct=pcm[i];
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float *logmdct=mdct+framesize/2;
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analysis("pre",frameno+i,pcm[i],framesize,0,0);
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/* fft and mdct transforms */
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for(j=0;j<framesize;j++)
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fft[j]=pcm[i][j]*=window[j];
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drft_forward(&f_look,fft);
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local_ampmax[i]=-9999.f;
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fft[0]*=scale;
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fft[0]=todB(fft);
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for(j=1;j<framesize-1;j+=2){
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float temp=scale*FAST_HYPOT(fft[j],fft[j+1]);
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temp=fft[(j+1)>>1]=todB(&temp);
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if(temp>local_ampmax[i])local_ampmax[i]=temp;
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}
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if(local_ampmax[i]>ampmax)ampmax=local_ampmax[i];
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mdct_forward(&m_look,pcm[i],mdct);
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for(j=0;j<framesize/2;j++)
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logmdct[j]=todB(mdct+j);
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analysis("mdct",frameno+i,logmdct,framesize/2,1,0);
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analysis("fft",frameno+i,fft,framesize/2,1,0);
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}
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for(i=0;i<2;i++){
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float amp;
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float *fft=work[i];
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float *logmax=fft;
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float *mdct=pcm[i];
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float *logmdct=mdct+framesize/2;
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float *mask=fft+framesize/2;
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/* floor psychoacoustics */
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_vp_compute_mask(&p_look,
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pg_look,
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i,
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fft,
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logmdct,
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mask,
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ampmax,
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local_ampmax[i],
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framesize/2);
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analysis("mask",frameno+i,mask,framesize/2,1,0);
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{
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vorbis_block vb;
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vorbis_dsp_state vd;
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memset(&vd,0,sizeof(vd));
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vd.vi=&vi;
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vb.vd=&vd;
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vb.pcmend=framesize;
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/* floor quantization/application */
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nonzero[i]=_floor_P[1]->forward(&vb,floor_look,
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mdct,
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logmdct,
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mask,
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logmax,
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flr[i]);
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}
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_vp_remove_floor(&p_look,
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pg_look,
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logmdct,
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mdct,
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flr[i],
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pcm[i],
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local_ampmax[i]);
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for(j=0;j<framesize/2;j++)
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if(fabs(pcm[i][j])>1500)
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fprintf(stderr,"%ld ",frameno+i);
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analysis("res",frameno+i,pcm[i],framesize/2,1,0);
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analysis("codedflr",frameno+i,flr[i],framesize/2,1,1);
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}
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/* residue prequantization */
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_vp_partition_prequant(&p_look,
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&vi,
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pcm,
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nonzero);
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for(i=0;i<2;i++)
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analysis("quant",frameno+i,pcm[i],framesize/2,1,0);
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|
/* channel coupling / stereo quantization */
|
|
|
|
_vp_couple(&p_look,
|
|
&mapping_info,
|
|
pcm,
|
|
nonzero);
|
|
|
|
for(i=0;i<2;i++)
|
|
analysis("coupled",frameno+i,pcm[i],framesize/2,1,0);
|
|
|
|
/* decoupling */
|
|
for(i=mapping_info.coupling_steps-1;i>=0;i--){
|
|
float *pcmM=pcm[mapping_info.coupling_mag[i]];
|
|
float *pcmA=pcm[mapping_info.coupling_ang[i]];
|
|
|
|
for(j=0;j<framesize/2;j++){
|
|
float mag=pcmM[j];
|
|
float ang=pcmA[j];
|
|
|
|
if(mag>0)
|
|
if(ang>0){
|
|
pcmM[j]=mag;
|
|
pcmA[j]=mag-ang;
|
|
}else{
|
|
pcmA[j]=mag;
|
|
pcmM[j]=mag+ang;
|
|
}
|
|
else
|
|
if(ang>0){
|
|
pcmM[j]=mag;
|
|
pcmA[j]=mag+ang;
|
|
}else{
|
|
pcmA[j]=mag;
|
|
pcmM[j]=mag-ang;
|
|
}
|
|
}
|
|
}
|
|
|
|
for(i=0;i<2;i++)
|
|
analysis("decoupled",frameno+i,pcm[i],framesize/2,1,0);
|
|
|
|
for(i=0;i<2;i++){
|
|
float amp;
|
|
|
|
for(j=0;j<framesize/2;j++)
|
|
pcm[i][j]*=flr[i][j];
|
|
|
|
analysis("final",frameno+i,pcm[i],framesize/2,1,1);
|
|
|
|
/* take it back to time */
|
|
mdct_backward(&m_look,pcm[i],pcm[i]);
|
|
|
|
for(j=0;j<framesize/2;j++)
|
|
out[i][j]+=pcm[i][j]*window[j];
|
|
|
|
analysis("out",frameno+i,out[i],framesize/2,0,0);
|
|
|
|
|
|
}
|
|
|
|
/* write data. Use the part of buffer we're about to shift out */
|
|
for(i=0;i<2;i++){
|
|
char *ptr=buffer+i*2;
|
|
float *mono=out[i];
|
|
int flag=0;
|
|
for(j=0;j<framesize/2;j++){
|
|
int val=mono[j]*32767.;
|
|
/* might as well guard against clipping */
|
|
if(val>32767){
|
|
if(!flag)fprintf(stderr,"clipping in frame %ld ",frameno+i);
|
|
flag=1;
|
|
val=32767;
|
|
}
|
|
if(val<-32768){
|
|
if(!flag)fprintf(stderr,"clipping in frame %ld ",frameno+i);
|
|
flag=1;
|
|
val=-32768;
|
|
}
|
|
ptr[0]=val&0xff;
|
|
ptr[1]=(val>>8)&0xff;
|
|
ptr+=4;
|
|
}
|
|
}
|
|
|
|
fprintf(stderr,"*");
|
|
fwrite(buffer,1,framesize*2,stdout);
|
|
memmove(buffer,buffer2,framesize*2);
|
|
|
|
for(i=0;i<2;i++){
|
|
for(j=0,k=framesize/2;j<framesize/2;j++,k++)
|
|
out[i][j]=pcm[i][k]*window[k];
|
|
}
|
|
frameno+=2;
|
|
}else
|
|
eos=1;
|
|
}
|
|
fprintf(stderr,"average raw bits of entropy: %.03g/sample\n",acc/tot);
|
|
fprintf(stderr,"average nonzero samples: %.03g/%d\n",nonz/tot*framesize/2,
|
|
framesize/2);
|
|
fprintf(stderr,"Done\n\n");
|
|
return 0;
|
|
}
|