| 1 | /********************************************************************
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| 2 | * *
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| 3 | * THIS FILE IS PART OF THE OggVorbis SOFTWARE CODEC SOURCE CODE. *
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| 4 | * USE, DISTRIBUTION AND REPRODUCTION OF THIS LIBRARY SOURCE IS *
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| 5 | * GOVERNED BY A BSD-STYLE SOURCE LICENSE INCLUDED WITH THIS SOURCE *
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| 6 | * IN 'COPYING'. PLEASE READ THESE TERMS BEFORE DISTRIBUTING. *
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| 7 | * *
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| 8 | * THE OggVorbis SOURCE CODE IS (C) COPYRIGHT 1994-2007 *
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| 9 | * by the Xiph.Org Foundation https://xiph.org/ *
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| 10 | * *
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| 11 | ********************************************************************
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| 12 |
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| 13 | function: simple utility that runs audio through the psychoacoustics
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| 14 | without encoding
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| 15 |
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| 16 | ********************************************************************/
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| 17 |
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| 18 | /* NB: this is dead code, retained purely for doc and reference value
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| 19 | don't try to compile it */
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| 20 |
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| 21 | #include <stdio.h>
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| 22 | #include <stdlib.h>
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| 23 | #include <string.h>
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| 24 | #include <math.h>
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| 25 |
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| 26 | #include "vorbis/codec.h"
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| 27 | #include "codec_internal.h"
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| 28 | #include "os.h"
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| 29 | #include "misc.h"
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| 30 | #include "psy.h"
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| 31 | #include "mdct.h"
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| 32 | #include "smallft.h"
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| 33 | #include "window.h"
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| 34 | #include "scales.h"
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| 35 | #include "lpc.h"
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| 36 | #include "lsp.h"
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| 37 | #include "masking.h"
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| 38 | #include "registry.h"
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| 39 |
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| 40 | static vorbis_info_psy_global _psy_set0G={
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| 41 | 0, /* decaydBpms */
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| 42 | 8, /* lines per eighth octave */
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| 43 |
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| 44 | /* thresh sample period, preecho clamp trigger threshhold, range, minenergy */
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| 45 | 256, {26.f,26.f,26.f,30.f}, {-90.f,-90.f,-90.f,-90.f}, -90.f,
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| 46 | -6.f,
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| 47 |
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| 48 | 0,
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| 49 |
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| 50 | 0.,
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| 51 | 0.,
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| 52 | };
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| 53 |
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| 54 | static vp_part _vp_part0[]={
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| 55 | { 1,9e10f, 9e10f, 1.f,9999.f},
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| 56 | { 9999, .75f, 9e10f, .5f,9999.f},
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| 57 | /*{ 9999, 1.5f, 9e10f, .5f,9999.f},*/
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| 58 | { 18,9e10f, 9e10f, .5f, 30.f},
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| 59 | { 9999,9e10f, 9e10f, .5f, 30.f}
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| 60 | };
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| 61 |
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| 62 | static vp_couple _vp_couple0[]={
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| 63 | { 1, {9e10f,9e10f,0}, { 0.f, 0.f,0}, { 0.f, 0.f,0}, {0.f,0.f,0}},
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| 64 | { 18, {9e10f,9e10f,0}, { 0.f, 0.f,0}, { 0.f, 0.f,0}, {0.f,0.f,0}},
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| 65 | { 9999, {9e10f,9e10f,0}, { 0.f, 9e10f,0}, { 0.f,22.f,1}, {0.f,0.f,0}}
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| 66 | };
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| 67 |
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| 68 | static vorbis_info_psy _psy_set0={
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| 69 | ATH_Bark_dB_lineaggressive,
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| 70 |
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| 71 | -100.f,
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| 72 | -140.f,
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| 73 | 6.f, /* floor master att */
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| 74 |
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| 75 | /* 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 */
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| 76 | /* 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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| 77 | /* y: 0 10 20 30 40 50 60 70 80 90 100 dB */
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| 78 | 1, /* tonemaskp */
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| 79 | 0.f, /* tone master att */
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| 80 | /* 0 10 20 30 40 50 60 70 80 90 100 */
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| 81 | {
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| 82 | {-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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| 83 | {-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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| 84 | {-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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| 85 |
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| 86 | {-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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| 87 | {-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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| 88 | {-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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| 89 | {-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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| 90 | {-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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| 91 | {-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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| 92 | {-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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| 93 | {-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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| 94 | {-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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| 95 | {-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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| 96 |
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| 97 | {-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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| 98 |
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| 99 | {-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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| 100 | {-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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| 101 | {-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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| 102 |
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| 103 | },
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| 104 |
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| 105 | 1,/* peakattp */
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| 106 | {{-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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| 107 | {-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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| 108 | {-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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| 109 | {-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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| 110 | {-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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| 111 | {-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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| 112 | {-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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| 113 | {-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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| 114 | {-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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| 115 | {-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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| 116 | {-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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| 117 | {-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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| 118 | {-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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| 119 | {-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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| 120 | {-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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| 121 | {-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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| 122 | {-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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| 123 | },
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| 124 |
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| 125 | 1,/*noisemaskp */
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| 126 | -10.f, /* suppress any noise curve over maxspec+n */
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| 127 | .5f, /* low window */
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| 128 | .5f, /* high window */
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| 129 | 10,
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| 130 | 10,
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| 131 | 25,
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| 132 | {.000f, 0.f, /*63*/
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| 133 | .000f, 0.f, /*88*/
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| 134 | .000f, 0.f, /*125*/
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| 135 | .000f, 0.f, /*175*/
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| 136 | .000f, 0.f, /*250*/
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| 137 | .000f, 0.f, /*350*/
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| 138 | .000f, 0.f, /*500*/
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| 139 | .000f, 0.f, /*700*/
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| 140 | .000f, 0.f, /*1000*/
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| 141 | .300f, 0.f, /*1400*/
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| 142 | .300f, 0.f, /*2000*/
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| 143 | .300f, 0.f, /*2800*/
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| 144 | .500f, 0.f, /*4000*/
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| 145 | .700f, 0.f, /*5600*/
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| 146 | .850f, 0.f, /*8000*/
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| 147 | .900f, 0.f, /*11500*/
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| 148 | .900f, 1.f, /*16000*/
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| 149 | },
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| 150 |
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| 151 | 95.f, /* even decade + 5 is important; saves an rint() later in a
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| 152 | tight loop) */
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| 153 | -44.,
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| 154 |
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| 155 | 32,
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| 156 | _vp_part0,_vp_couple0
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| 157 | };
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| 158 |
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| 159 | static vorbis_info_floor1 _floor_set0={1,
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| 160 | {0},
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| 161 |
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| 162 | {32},
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| 163 | {0},
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| 164 | {0},
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| 165 | {{-1}},
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| 166 |
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| 167 | 2,
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| 168 | {0,1024,
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| 169 |
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| 170 | 88,31,243,
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| 171 |
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| 172 | 14,54,143,460,
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| 173 |
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| 174 | 6,3,10, 22,18,26, 41,36,47,
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| 175 | 69,61,78, 112,99,126, 185,162,211,
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| 176 | 329,282,387, 672,553,825
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| 177 | },
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| 178 |
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| 179 | 60,30,400,
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| 180 | 20,8,1,18.,
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| 181 | 20,600,
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| 182 | 960};
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| 183 |
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| 184 |
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| 185 | static vorbis_info_mapping0 mapping_info={1,{0,1},{0},{0},{0},0, 1, {0},{1}};
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| 186 | static codec_setup_info codec_setup0={ {0,0},
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| 187 | 1,1,1,1,1,0,1,
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| 188 | {NULL},
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| 189 | {0},{&mapping_info},
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| 190 | {0},{NULL},
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| 191 | {1},{&_floor_set0},
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| 192 | {2},{NULL},
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| 193 | {NULL},
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| 194 | {&_psy_set0},
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| 195 | &_psy_set0G};
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| 196 |
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| 197 | static int noisy=0;
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| 198 | void analysis(char *base,int i,float *v,int n,int bark,int dB){
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| 199 | if(noisy){
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| 200 | int j;
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| 201 | FILE *of;
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| 202 | char buffer[80];
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| 203 | sprintf(buffer,"%s_%d.m",base,i);
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| 204 | of=fopen(buffer,"w");
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| 205 |
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| 206 | for(j=0;j<n;j++){
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| 207 | if(dB && v[j]==0)
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| 208 | fprintf(of,"\n\n");
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| 209 | else{
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| 210 | if(bark)
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| 211 | fprintf(of,"%g ",toBARK(22050.f*j/n));
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| 212 | else
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| 213 | fprintf(of,"%g ",(float)j);
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| 214 |
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| 215 | if(dB){
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| 216 | fprintf(of,"%g\n",todB(v+j));
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| 217 | }else{
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| 218 | fprintf(of,"%g\n",v[j]);
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| 219 | }
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| 220 | }
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| 221 | }
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| 222 | fclose(of);
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| 223 | }
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| 224 | }
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| 225 |
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| 226 | long frameno=0;
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| 227 |
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| 228 | /****************************************************************/
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| 229 |
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| 230 | int main(int argc,char *argv[]){
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| 231 | int eos=0;
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| 232 | float nonz=0.f;
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| 233 | float acc=0.f;
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| 234 | float tot=0.f;
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| 235 | float ampmax=-9999,newmax;
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| 236 | float local_ampmax[2];
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| 237 |
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| 238 | int framesize=2048;
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| 239 | float ampmax_att_per_sec=-6.;
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| 240 |
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| 241 | float *pcm[2],*out[2],*window,*flr[2],*mask[2],*work[2];
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| 242 | signed char *buffer,*buffer2;
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| 243 | mdct_lookup m_look;
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| 244 | drft_lookup f_look;
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| 245 | vorbis_look_psy p_look;
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| 246 | vorbis_look_psy_global *pg_look;
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| 247 | vorbis_look_floor *floor_look;
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| 248 | vorbis_info vi;
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| 249 | long i,j,k;
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| 250 |
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| 251 | int ath=0;
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| 252 | int decayp=0;
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| 253 |
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| 254 | argv++;
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| 255 | while(*argv){
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| 256 | if(*argv[0]=='-'){
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| 257 | /* option */
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| 258 | if(argv[0][1]=='v'){
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| 259 | noisy=0;
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| 260 | }
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| 261 | }else
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| 262 | if(*argv[0]=='+'){
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| 263 | /* option */
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| 264 | if(argv[0][1]=='v'){
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| 265 | noisy=1;
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| 266 | }
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| 267 | }else
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| 268 | framesize=atoi(argv[0]);
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| 269 | argv++;
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| 270 | }
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| 271 |
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| 272 | vi.channels=2;
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| 273 | vi.codec_setup=&codec_setup0;
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| 274 |
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| 275 | pcm[0]=_ogg_malloc(framesize*sizeof(float));
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| 276 | pcm[1]=_ogg_malloc(framesize*sizeof(float));
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| 277 | out[0]=_ogg_calloc(framesize/2,sizeof(float));
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| 278 | out[1]=_ogg_calloc(framesize/2,sizeof(float));
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| 279 | work[0]=_ogg_calloc(framesize,sizeof(float));
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| 280 | work[1]=_ogg_calloc(framesize,sizeof(float));
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| 281 | flr[0]=_ogg_calloc(framesize/2,sizeof(float));
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| 282 | flr[1]=_ogg_calloc(framesize/2,sizeof(float));
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| 283 | buffer=_ogg_malloc(framesize*4);
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| 284 | buffer2=buffer+framesize*2;
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| 285 | window=_vorbis_window_create(0,framesize,framesize/2,framesize/2);
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| 286 | mdct_init(&m_look,framesize);
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| 287 | drft_init(&f_look,framesize);
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| 288 | _vp_psy_init(&p_look,&_psy_set0,&_psy_set0G,framesize/2,44100);
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| 289 | pg_look=_vp_global_look(&vi);
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| 290 | floor_look=_floor_P[1]->look(NULL,NULL,&_floor_set0);
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| 291 |
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| 292 | /* we cheat on the WAV header; we just bypass 44 bytes and never
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| 293 | verify that it matches 16bit/stereo/44.1kHz. */
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| 294 |
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| 295 | fread(buffer,1,44,stdin);
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| 296 | fwrite(buffer,1,44,stdout);
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| 297 | memset(buffer,0,framesize*2);
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| 298 |
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| 299 | analysis("window",0,window,framesize,0,0);
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| 300 |
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| 301 | fprintf(stderr,"Processing for frame size %d...\n",framesize);
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| 302 |
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| 303 | while(!eos){
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| 304 | long bytes=fread(buffer2,1,framesize*2,stdin);
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| 305 | if(bytes<framesize*2)
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| 306 | memset(buffer2+bytes,0,framesize*2-bytes);
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| 307 |
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| 308 | if(bytes!=0){
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| 309 | int nonzero[2];
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| 310 |
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| 311 | /* uninterleave samples */
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| 312 | for(i=0;i<framesize;i++){
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| 313 | pcm[0][i]=((buffer[i*4+1]<<8)|
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| 314 | (0x00ff&(int)buffer[i*4]))/32768.f;
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| 315 | pcm[1][i]=((buffer[i*4+3]<<8)|
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| 316 | (0x00ff&(int)buffer[i*4+2]))/32768.f;
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| 317 | }
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| 318 |
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| 319 | {
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| 320 | float secs=framesize/44100.;
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| 321 |
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| 322 | ampmax+=secs*ampmax_att_per_sec;
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| 323 | if(ampmax<-9999)ampmax=-9999;
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| 324 | }
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| 325 |
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| 326 | for(i=0;i<2;i++){
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| 327 | float scale=4.f/framesize;
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| 328 | float *fft=work[i];
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| 329 | float *mdct=pcm[i];
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| 330 | float *logmdct=mdct+framesize/2;
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| 331 |
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| 332 | analysis("pre",frameno+i,pcm[i],framesize,0,0);
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| 333 |
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| 334 | /* fft and mdct transforms */
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| 335 | for(j=0;j<framesize;j++)
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| 336 | fft[j]=pcm[i][j]*=window[j];
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| 337 |
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| 338 | drft_forward(&f_look,fft);
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| 339 |
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| 340 | local_ampmax[i]=-9999.f;
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| 341 | fft[0]*=scale;
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| 342 | fft[0]=todB(fft);
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| 343 | for(j=1;j<framesize-1;j+=2){
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| 344 | float temp=scale*FAST_HYPOT(fft[j],fft[j+1]);
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| 345 | temp=fft[(j+1)>>1]=todB(&temp);
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| 346 | if(temp>local_ampmax[i])local_ampmax[i]=temp;
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| 347 | }
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| 348 | if(local_ampmax[i]>ampmax)ampmax=local_ampmax[i];
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| 349 |
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| 350 | mdct_forward(&m_look,pcm[i],mdct);
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| 351 | for(j=0;j<framesize/2;j++)
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| 352 | logmdct[j]=todB(mdct+j);
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| 353 |
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| 354 | analysis("mdct",frameno+i,logmdct,framesize/2,1,0);
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| 355 | analysis("fft",frameno+i,fft,framesize/2,1,0);
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| 356 | }
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| 357 |
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| 358 | for(i=0;i<2;i++){
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| 359 | float amp;
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| 360 | float *fft=work[i];
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| 361 | float *logmax=fft;
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| 362 | float *mdct=pcm[i];
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| 363 | float *logmdct=mdct+framesize/2;
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| 364 | float *mask=fft+framesize/2;
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| 365 |
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| 366 | /* floor psychoacoustics */
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| 367 | _vp_compute_mask(&p_look,
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| 368 | pg_look,
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| 369 | i,
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| 370 | fft,
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| 371 | logmdct,
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| 372 | mask,
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| 373 | ampmax,
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| 374 | local_ampmax[i],
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| 375 | framesize/2);
|
|---|
| 376 |
|
|---|
| 377 | analysis("mask",frameno+i,mask,framesize/2,1,0);
|
|---|
| 378 |
|
|---|
| 379 | {
|
|---|
| 380 | vorbis_block vb;
|
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| 381 | vorbis_dsp_state vd;
|
|---|
| 382 | memset(&vd,0,sizeof(vd));
|
|---|
| 383 | vd.vi=&vi;
|
|---|
| 384 | vb.vd=&vd;
|
|---|
| 385 | vb.pcmend=framesize;
|
|---|
| 386 |
|
|---|
| 387 | /* floor quantization/application */
|
|---|
| 388 | nonzero[i]=_floor_P[1]->forward(&vb,floor_look,
|
|---|
| 389 | mdct,
|
|---|
| 390 | logmdct,
|
|---|
| 391 | mask,
|
|---|
| 392 | logmax,
|
|---|
| 393 |
|
|---|
| 394 | flr[i]);
|
|---|
| 395 | }
|
|---|
| 396 |
|
|---|
| 397 | _vp_remove_floor(&p_look,
|
|---|
| 398 | pg_look,
|
|---|
| 399 | logmdct,
|
|---|
| 400 | mdct,
|
|---|
| 401 | flr[i],
|
|---|
| 402 | pcm[i],
|
|---|
| 403 | local_ampmax[i]);
|
|---|
| 404 |
|
|---|
| 405 | for(j=0;j<framesize/2;j++)
|
|---|
| 406 | if(fabs(pcm[i][j])>1500)
|
|---|
| 407 | fprintf(stderr,"%ld ",frameno+i);
|
|---|
| 408 |
|
|---|
| 409 | analysis("res",frameno+i,pcm[i],framesize/2,1,0);
|
|---|
| 410 | analysis("codedflr",frameno+i,flr[i],framesize/2,1,1);
|
|---|
| 411 | }
|
|---|
| 412 |
|
|---|
| 413 | /* residue prequantization */
|
|---|
| 414 | _vp_partition_prequant(&p_look,
|
|---|
| 415 | &vi,
|
|---|
| 416 | pcm,
|
|---|
| 417 | nonzero);
|
|---|
| 418 |
|
|---|
| 419 | for(i=0;i<2;i++)
|
|---|
| 420 | analysis("quant",frameno+i,pcm[i],framesize/2,1,0);
|
|---|
| 421 |
|
|---|
| 422 | /* channel coupling / stereo quantization */
|
|---|
| 423 |
|
|---|
| 424 | _vp_couple(&p_look,
|
|---|
| 425 | &mapping_info,
|
|---|
| 426 | pcm,
|
|---|
| 427 | nonzero);
|
|---|
| 428 |
|
|---|
| 429 | for(i=0;i<2;i++)
|
|---|
| 430 | analysis("coupled",frameno+i,pcm[i],framesize/2,1,0);
|
|---|
| 431 |
|
|---|
| 432 | /* decoupling */
|
|---|
| 433 | for(i=mapping_info.coupling_steps-1;i>=0;i--){
|
|---|
| 434 | float *pcmM=pcm[mapping_info.coupling_mag[i]];
|
|---|
| 435 | float *pcmA=pcm[mapping_info.coupling_ang[i]];
|
|---|
| 436 |
|
|---|
| 437 | for(j=0;j<framesize/2;j++){
|
|---|
| 438 | float mag=pcmM[j];
|
|---|
| 439 | float ang=pcmA[j];
|
|---|
| 440 |
|
|---|
| 441 | if(mag>0)
|
|---|
| 442 | if(ang>0){
|
|---|
| 443 | pcmM[j]=mag;
|
|---|
| 444 | pcmA[j]=mag-ang;
|
|---|
| 445 | }else{
|
|---|
| 446 | pcmA[j]=mag;
|
|---|
| 447 | pcmM[j]=mag+ang;
|
|---|
| 448 | }
|
|---|
| 449 | else
|
|---|
| 450 | if(ang>0){
|
|---|
| 451 | pcmM[j]=mag;
|
|---|
| 452 | pcmA[j]=mag+ang;
|
|---|
| 453 | }else{
|
|---|
| 454 | pcmA[j]=mag;
|
|---|
| 455 | pcmM[j]=mag-ang;
|
|---|
| 456 | }
|
|---|
| 457 | }
|
|---|
| 458 | }
|
|---|
| 459 |
|
|---|
| 460 | for(i=0;i<2;i++)
|
|---|
| 461 | analysis("decoupled",frameno+i,pcm[i],framesize/2,1,0);
|
|---|
| 462 |
|
|---|
| 463 | for(i=0;i<2;i++){
|
|---|
| 464 | float amp;
|
|---|
| 465 |
|
|---|
| 466 | for(j=0;j<framesize/2;j++)
|
|---|
| 467 | pcm[i][j]*=flr[i][j];
|
|---|
| 468 |
|
|---|
| 469 | analysis("final",frameno+i,pcm[i],framesize/2,1,1);
|
|---|
| 470 |
|
|---|
| 471 | /* take it back to time */
|
|---|
| 472 | mdct_backward(&m_look,pcm[i],pcm[i]);
|
|---|
| 473 |
|
|---|
| 474 | for(j=0;j<framesize/2;j++)
|
|---|
| 475 | out[i][j]+=pcm[i][j]*window[j];
|
|---|
| 476 |
|
|---|
| 477 | analysis("out",frameno+i,out[i],framesize/2,0,0);
|
|---|
| 478 |
|
|---|
| 479 |
|
|---|
| 480 | }
|
|---|
| 481 |
|
|---|
| 482 | /* write data. Use the part of buffer we're about to shift out */
|
|---|
| 483 | for(i=0;i<2;i++){
|
|---|
| 484 | char *ptr=buffer+i*2;
|
|---|
| 485 | float *mono=out[i];
|
|---|
| 486 | int flag=0;
|
|---|
| 487 | for(j=0;j<framesize/2;j++){
|
|---|
| 488 | int val=mono[j]*32767.;
|
|---|
| 489 | /* might as well guard against clipping */
|
|---|
| 490 | if(val>32767){
|
|---|
| 491 | if(!flag)fprintf(stderr,"clipping in frame %ld ",frameno+i);
|
|---|
| 492 | flag=1;
|
|---|
| 493 | val=32767;
|
|---|
| 494 | }
|
|---|
| 495 | if(val<-32768){
|
|---|
| 496 | if(!flag)fprintf(stderr,"clipping in frame %ld ",frameno+i);
|
|---|
| 497 | flag=1;
|
|---|
| 498 | val=-32768;
|
|---|
| 499 | }
|
|---|
| 500 | ptr[0]=val&0xff;
|
|---|
| 501 | ptr[1]=(val>>8)&0xff;
|
|---|
| 502 | ptr+=4;
|
|---|
| 503 | }
|
|---|
| 504 | }
|
|---|
| 505 |
|
|---|
| 506 | fprintf(stderr,"*");
|
|---|
| 507 | fwrite(buffer,1,framesize*2,stdout);
|
|---|
| 508 | memmove(buffer,buffer2,framesize*2);
|
|---|
| 509 |
|
|---|
| 510 | for(i=0;i<2;i++){
|
|---|
| 511 | for(j=0,k=framesize/2;j<framesize/2;j++,k++)
|
|---|
| 512 | out[i][j]=pcm[i][k]*window[k];
|
|---|
| 513 | }
|
|---|
| 514 | frameno+=2;
|
|---|
| 515 | }else
|
|---|
| 516 | eos=1;
|
|---|
| 517 | }
|
|---|
| 518 | fprintf(stderr,"average raw bits of entropy: %.03g/sample\n",acc/tot);
|
|---|
| 519 | fprintf(stderr,"average nonzero samples: %.03g/%d\n",nonz/tot*framesize/2,
|
|---|
| 520 | framesize/2);
|
|---|
| 521 | fprintf(stderr,"Done\n\n");
|
|---|
| 522 | return 0;
|
|---|
| 523 | }
|
|---|
