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 http://www.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 | last mod: $Id: psytune.c 13293 2007-07-24 00:09:47Z xiphmont $ |
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16 | |
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17 | ********************************************************************/ |
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18 | |
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19 | /* NB: this is dead code, retained purely for doc and reference value |
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20 | don't try to compile it */ |
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21 | |
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22 | #include <stdio.h> |
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23 | #include <stdlib.h> |
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24 | #include <string.h> |
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25 | #include <math.h> |
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26 | |
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27 | #include "vorbis/codec.h" |
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28 | #include "codec_internal.h" |
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29 | #include "os.h" |
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30 | #include "misc.h" |
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31 | #include "psy.h" |
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32 | #include "mdct.h" |
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33 | #include "smallft.h" |
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34 | #include "window.h" |
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35 | #include "scales.h" |
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36 | #include "lpc.h" |
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37 | #include "lsp.h" |
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38 | #include "masking.h" |
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39 | #include "registry.h" |
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40 | |
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41 | static vorbis_info_psy_global _psy_set0G={ |
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42 | 0, /* decaydBpms */ |
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43 | 8, /* lines per eighth octave */ |
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44 | |
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45 | /* thresh sample period, preecho clamp trigger threshhold, range, minenergy */ |
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46 | 256, {26.f,26.f,26.f,30.f}, {-90.f,-90.f,-90.f,-90.f}, -90.f, |
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47 | -6.f, |
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48 | |
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49 | 0, |
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50 | |
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51 | 0., |
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52 | 0., |
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53 | }; |
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54 | |
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55 | static vp_part _vp_part0[]={ |
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56 | { 1,9e10f, 9e10f, 1.f,9999.f}, |
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57 | { 9999, .75f, 9e10f, .5f,9999.f}, |
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58 | /*{ 9999, 1.5f, 9e10f, .5f,9999.f},*/ |
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59 | { 18,9e10f, 9e10f, .5f, 30.f}, |
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60 | { 9999,9e10f, 9e10f, .5f, 30.f} |
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61 | }; |
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62 | |
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63 | static vp_couple _vp_couple0[]={ |
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64 | { 1, {9e10f,9e10f,0}, { 0.f, 0.f,0}, { 0.f, 0.f,0}, {0.f,0.f,0}}, |
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65 | { 18, {9e10f,9e10f,0}, { 0.f, 0.f,0}, { 0.f, 0.f,0}, {0.f,0.f,0}}, |
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66 | { 9999, {9e10f,9e10f,0}, { 0.f, 9e10f,0}, { 0.f,22.f,1}, {0.f,0.f,0}} |
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67 | }; |
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68 | |
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69 | static vorbis_info_psy _psy_set0={ |
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70 | ATH_Bark_dB_lineaggressive, |
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71 | |
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72 | -100.f, |
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73 | -140.f, |
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74 | 6.f, /* floor master att */ |
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75 | |
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76 | /* 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 */ |
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77 | /* 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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78 | /* y: 0 10 20 30 40 50 60 70 80 90 100 dB */ |
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79 | 1, /* tonemaskp */ |
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80 | 0.f, /* tone master att */ |
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81 | /* 0 10 20 30 40 50 60 70 80 90 100 */ |
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82 | { |
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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}, /*63*/ |
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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}, /*88*/ |
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85 | {-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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86 | |
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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}, /*175*/ |
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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}, /*250*/ |
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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}, /*350*/ |
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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}, /*500*/ |
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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}, /*700*/ |
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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}, /*1000*/ |
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93 | {-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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94 | {-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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95 | {-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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96 | {-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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97 | |
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98 | {-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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99 | |
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100 | {-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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101 | {-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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102 | {-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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103 | |
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104 | }, |
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105 | |
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106 | 1,/* peakattp */ |
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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},/*63*/ |
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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},/*88*/ |
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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},/*125*/ |
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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},/*175*/ |
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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},/*250*/ |
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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},/*350*/ |
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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},/*500*/ |
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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},/*700*/ |
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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},/*1000*/ |
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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},/*1400*/ |
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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},/*2000*/ |
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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},/*2800*/ |
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119 | {-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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120 | {-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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121 | {-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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122 | {-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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123 | {-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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124 | }, |
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125 | |
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126 | 1,/*noisemaskp */ |
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127 | -10.f, /* suppress any noise curve over maxspec+n */ |
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128 | .5f, /* low window */ |
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129 | .5f, /* high window */ |
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130 | 10, |
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131 | 10, |
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132 | 25, |
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133 | {.000f, 0.f, /*63*/ |
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134 | .000f, 0.f, /*88*/ |
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135 | .000f, 0.f, /*125*/ |
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136 | .000f, 0.f, /*175*/ |
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137 | .000f, 0.f, /*250*/ |
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138 | .000f, 0.f, /*350*/ |
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139 | .000f, 0.f, /*500*/ |
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140 | .000f, 0.f, /*700*/ |
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141 | .000f, 0.f, /*1000*/ |
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142 | .300f, 0.f, /*1400*/ |
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143 | .300f, 0.f, /*2000*/ |
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144 | .300f, 0.f, /*2800*/ |
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145 | .500f, 0.f, /*4000*/ |
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146 | .700f, 0.f, /*5600*/ |
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147 | .850f, 0.f, /*8000*/ |
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148 | .900f, 0.f, /*11500*/ |
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149 | .900f, 1.f, /*16000*/ |
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150 | }, |
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151 | |
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152 | 95.f, /* even decade + 5 is important; saves an rint() later in a |
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153 | tight loop) */ |
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154 | -44., |
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155 | |
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156 | 32, |
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157 | _vp_part0,_vp_couple0 |
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158 | }; |
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159 | |
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160 | static vorbis_info_floor1 _floor_set0={1, |
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161 | {0}, |
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162 | |
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163 | {32}, |
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164 | {0}, |
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165 | {0}, |
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166 | {{-1}}, |
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167 | |
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168 | 2, |
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169 | {0,1024, |
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170 | |
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171 | 88,31,243, |
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172 | |
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173 | 14,54,143,460, |
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174 | |
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175 | 6,3,10, 22,18,26, 41,36,47, |
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176 | 69,61,78, 112,99,126, 185,162,211, |
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177 | 329,282,387, 672,553,825 |
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178 | }, |
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179 | |
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180 | 60,30,400, |
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181 | 20,8,1,18., |
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182 | 20,600, |
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183 | 960}; |
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184 | |
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185 | |
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186 | static vorbis_info_mapping0 mapping_info={1,{0,1},{0},{0},{0},0, 1, {0},{1}}; |
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187 | static codec_setup_info codec_setup0={ {0,0}, |
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188 | 1,1,1,1,1,0,1, |
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189 | {NULL}, |
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190 | {0},{&mapping_info}, |
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191 | {0},{NULL}, |
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192 | {1},{&_floor_set0}, |
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193 | {2},{NULL}, |
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194 | {NULL}, |
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195 | {&_psy_set0}, |
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196 | &_psy_set0G}; |
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197 | |
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198 | static int noisy=0; |
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199 | void analysis(char *base,int i,float *v,int n,int bark,int dB){ |
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200 | if(noisy){ |
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201 | int j; |
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202 | FILE *of; |
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203 | char buffer[80]; |
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204 | sprintf(buffer,"%s_%d.m",base,i); |
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205 | of=fopen(buffer,"w"); |
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206 | |
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207 | for(j=0;j<n;j++){ |
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208 | if(dB && v[j]==0) |
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209 | fprintf(of,"\n\n"); |
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210 | else{ |
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211 | if(bark) |
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212 | fprintf(of,"%g ",toBARK(22050.f*j/n)); |
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213 | else |
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214 | fprintf(of,"%g ",(float)j); |
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215 | |
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216 | if(dB){ |
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217 | fprintf(of,"%g\n",todB(v+j)); |
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218 | }else{ |
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219 | fprintf(of,"%g\n",v[j]); |
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220 | } |
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221 | } |
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222 | } |
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223 | fclose(of); |
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224 | } |
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225 | } |
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226 | |
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227 | long frameno=0; |
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228 | |
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229 | /****************************************************************/ |
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230 | |
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231 | int main(int argc,char *argv[]){ |
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232 | int eos=0; |
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233 | float nonz=0.f; |
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234 | float acc=0.f; |
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235 | float tot=0.f; |
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236 | float ampmax=-9999,newmax; |
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237 | float local_ampmax[2]; |
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238 | |
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239 | int framesize=2048; |
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240 | float ampmax_att_per_sec=-6.; |
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241 | |
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242 | float *pcm[2],*out[2],*window,*flr[2],*mask[2],*work[2]; |
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243 | signed char *buffer,*buffer2; |
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244 | mdct_lookup m_look; |
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245 | drft_lookup f_look; |
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246 | vorbis_look_psy p_look; |
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247 | vorbis_look_psy_global *pg_look; |
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248 | vorbis_look_floor *floor_look; |
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249 | vorbis_info vi; |
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250 | long i,j,k; |
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251 | |
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252 | int ath=0; |
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253 | int decayp=0; |
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254 | |
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255 | argv++; |
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256 | while(*argv){ |
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257 | if(*argv[0]=='-'){ |
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258 | /* option */ |
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259 | if(argv[0][1]=='v'){ |
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260 | noisy=0; |
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261 | } |
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262 | }else |
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263 | if(*argv[0]=='+'){ |
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264 | /* option */ |
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265 | if(argv[0][1]=='v'){ |
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266 | noisy=1; |
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267 | } |
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268 | }else |
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269 | framesize=atoi(argv[0]); |
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270 | argv++; |
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271 | } |
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272 | |
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273 | vi.channels=2; |
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274 | vi.codec_setup=&codec_setup0; |
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275 | |
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276 | pcm[0]=_ogg_malloc(framesize*sizeof(float)); |
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277 | pcm[1]=_ogg_malloc(framesize*sizeof(float)); |
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278 | out[0]=_ogg_calloc(framesize/2,sizeof(float)); |
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279 | out[1]=_ogg_calloc(framesize/2,sizeof(float)); |
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280 | work[0]=_ogg_calloc(framesize,sizeof(float)); |
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281 | work[1]=_ogg_calloc(framesize,sizeof(float)); |
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282 | flr[0]=_ogg_calloc(framesize/2,sizeof(float)); |
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283 | flr[1]=_ogg_calloc(framesize/2,sizeof(float)); |
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284 | buffer=_ogg_malloc(framesize*4); |
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285 | buffer2=buffer+framesize*2; |
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286 | window=_vorbis_window_create(0,framesize,framesize/2,framesize/2); |
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287 | mdct_init(&m_look,framesize); |
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288 | drft_init(&f_look,framesize); |
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289 | _vp_psy_init(&p_look,&_psy_set0,&_psy_set0G,framesize/2,44100); |
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290 | pg_look=_vp_global_look(&vi); |
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291 | floor_look=_floor_P[1]->look(NULL,NULL,&_floor_set0); |
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292 | |
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293 | /* we cheat on the WAV header; we just bypass 44 bytes and never |
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294 | verify that it matches 16bit/stereo/44.1kHz. */ |
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295 | |
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296 | fread(buffer,1,44,stdin); |
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297 | fwrite(buffer,1,44,stdout); |
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298 | memset(buffer,0,framesize*2); |
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299 | |
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300 | analysis("window",0,window,framesize,0,0); |
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301 | |
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302 | fprintf(stderr,"Processing for frame size %d...\n",framesize); |
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303 | |
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304 | while(!eos){ |
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305 | long bytes=fread(buffer2,1,framesize*2,stdin); |
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306 | if(bytes<framesize*2) |
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307 | memset(buffer2+bytes,0,framesize*2-bytes); |
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308 | |
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309 | if(bytes!=0){ |
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310 | int nonzero[2]; |
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311 | |
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312 | /* uninterleave samples */ |
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313 | for(i=0;i<framesize;i++){ |
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314 | pcm[0][i]=((buffer[i*4+1]<<8)| |
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315 | (0x00ff&(int)buffer[i*4]))/32768.f; |
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316 | pcm[1][i]=((buffer[i*4+3]<<8)| |
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317 | (0x00ff&(int)buffer[i*4+2]))/32768.f; |
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318 | } |
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319 | |
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320 | { |
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321 | float secs=framesize/44100.; |
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322 | |
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323 | ampmax+=secs*ampmax_att_per_sec; |
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324 | if(ampmax<-9999)ampmax=-9999; |
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325 | } |
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326 | |
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327 | for(i=0;i<2;i++){ |
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328 | float scale=4.f/framesize; |
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329 | float *fft=work[i]; |
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330 | float *mdct=pcm[i]; |
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331 | float *logmdct=mdct+framesize/2; |
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332 | |
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333 | analysis("pre",frameno+i,pcm[i],framesize,0,0); |
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334 | |
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335 | /* fft and mdct transforms */ |
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336 | for(j=0;j<framesize;j++) |
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337 | fft[j]=pcm[i][j]*=window[j]; |
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338 | |
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339 | drft_forward(&f_look,fft); |
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340 | |
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341 | local_ampmax[i]=-9999.f; |
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342 | fft[0]*=scale; |
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343 | fft[0]=todB(fft); |
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344 | for(j=1;j<framesize-1;j+=2){ |
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345 | float temp=scale*FAST_HYPOT(fft[j],fft[j+1]); |
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346 | temp=fft[(j+1)>>1]=todB(&temp); |
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347 | if(temp>local_ampmax[i])local_ampmax[i]=temp; |
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348 | } |
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349 | if(local_ampmax[i]>ampmax)ampmax=local_ampmax[i]; |
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350 | |
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351 | mdct_forward(&m_look,pcm[i],mdct); |
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352 | for(j=0;j<framesize/2;j++) |
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353 | logmdct[j]=todB(mdct+j); |
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354 | |
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355 | analysis("mdct",frameno+i,logmdct,framesize/2,1,0); |
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356 | analysis("fft",frameno+i,fft,framesize/2,1,0); |
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357 | } |
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358 | |
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359 | for(i=0;i<2;i++){ |
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360 | float amp; |
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361 | float *fft=work[i]; |
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362 | float *logmax=fft; |
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363 | float *mdct=pcm[i]; |
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364 | float *logmdct=mdct+framesize/2; |
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365 | float *mask=fft+framesize/2; |
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366 | |
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367 | /* floor psychoacoustics */ |
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368 | _vp_compute_mask(&p_look, |
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369 | pg_look, |
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370 | i, |
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371 | fft, |
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372 | logmdct, |
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373 | mask, |
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374 | ampmax, |
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375 | local_ampmax[i], |
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376 | framesize/2); |
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377 | |
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378 | analysis("mask",frameno+i,mask,framesize/2,1,0); |
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379 | |
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380 | { |
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381 | vorbis_block vb; |
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382 | vorbis_dsp_state vd; |
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383 | memset(&vd,0,sizeof(vd)); |
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384 | vd.vi=&vi; |
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385 | vb.vd=&vd; |
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386 | vb.pcmend=framesize; |
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387 | |
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388 | /* floor quantization/application */ |
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389 | nonzero[i]=_floor_P[1]->forward(&vb,floor_look, |
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390 | mdct, |
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391 | logmdct, |
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392 | mask, |
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393 | logmax, |
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394 | |
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395 | flr[i]); |
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396 | } |
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397 | |
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398 | _vp_remove_floor(&p_look, |
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399 | pg_look, |
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400 | logmdct, |
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401 | mdct, |
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402 | flr[i], |
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403 | pcm[i], |
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404 | local_ampmax[i]); |
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405 | |
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406 | for(j=0;j<framesize/2;j++) |
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407 | if(fabs(pcm[i][j])>1500) |
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408 | fprintf(stderr,"%ld ",frameno+i); |
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409 | |
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410 | analysis("res",frameno+i,pcm[i],framesize/2,1,0); |
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411 | analysis("codedflr",frameno+i,flr[i],framesize/2,1,1); |
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412 | } |
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413 | |
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414 | /* residue prequantization */ |
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415 | _vp_partition_prequant(&p_look, |
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416 | &vi, |
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417 | pcm, |
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418 | nonzero); |
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419 | |
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420 | for(i=0;i<2;i++) |
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421 | analysis("quant",frameno+i,pcm[i],framesize/2,1,0); |
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422 | |
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423 | /* channel coupling / stereo quantization */ |
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424 | |
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425 | _vp_couple(&p_look, |
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426 | &mapping_info, |
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427 | pcm, |
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428 | nonzero); |
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429 | |
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430 | for(i=0;i<2;i++) |
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431 | analysis("coupled",frameno+i,pcm[i],framesize/2,1,0); |
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432 | |
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433 | /* decoupling */ |
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434 | for(i=mapping_info.coupling_steps-1;i>=0;i--){ |
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435 | float *pcmM=pcm[mapping_info.coupling_mag[i]]; |
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436 | float *pcmA=pcm[mapping_info.coupling_ang[i]]; |
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437 | |
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438 | for(j=0;j<framesize/2;j++){ |
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439 | float mag=pcmM[j]; |
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440 | float ang=pcmA[j]; |
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441 | |
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442 | if(mag>0) |
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443 | if(ang>0){ |
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444 | pcmM[j]=mag; |
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445 | pcmA[j]=mag-ang; |
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446 | }else{ |
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447 | pcmA[j]=mag; |
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448 | pcmM[j]=mag+ang; |
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449 | } |
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450 | else |
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451 | if(ang>0){ |
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452 | pcmM[j]=mag; |
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453 | pcmA[j]=mag+ang; |
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454 | }else{ |
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455 | pcmA[j]=mag; |
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456 | pcmM[j]=mag-ang; |
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457 | } |
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458 | } |
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459 | } |
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460 | |
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461 | for(i=0;i<2;i++) |
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462 | analysis("decoupled",frameno+i,pcm[i],framesize/2,1,0); |
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463 | |
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464 | for(i=0;i<2;i++){ |
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465 | float amp; |
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466 | |
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467 | for(j=0;j<framesize/2;j++) |
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468 | pcm[i][j]*=flr[i][j]; |
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469 | |
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470 | analysis("final",frameno+i,pcm[i],framesize/2,1,1); |
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471 | |
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472 | /* take it back to time */ |
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473 | mdct_backward(&m_look,pcm[i],pcm[i]); |
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474 | |
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475 | for(j=0;j<framesize/2;j++) |
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476 | out[i][j]+=pcm[i][j]*window[j]; |
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477 | |
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478 | analysis("out",frameno+i,out[i],framesize/2,0,0); |
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479 | |
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480 | |
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481 | } |
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482 | |
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483 | /* write data. Use the part of buffer we're about to shift out */ |
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484 | for(i=0;i<2;i++){ |
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485 | char *ptr=buffer+i*2; |
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486 | float *mono=out[i]; |
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487 | int flag=0; |
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488 | for(j=0;j<framesize/2;j++){ |
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489 | int val=mono[j]*32767.; |
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490 | /* might as well guard against clipping */ |
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491 | if(val>32767){ |
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492 | if(!flag)fprintf(stderr,"clipping in frame %ld ",frameno+i); |
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493 | flag=1; |
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494 | val=32767; |
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495 | } |
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496 | if(val<-32768){ |
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497 | if(!flag)fprintf(stderr,"clipping in frame %ld ",frameno+i); |
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498 | flag=1; |
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499 | val=-32768; |
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500 | } |
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501 | ptr[0]=val&0xff; |
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502 | ptr[1]=(val>>8)&0xff; |
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503 | ptr+=4; |
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504 | } |
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505 | } |
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506 | |
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507 | fprintf(stderr,"*"); |
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508 | fwrite(buffer,1,framesize*2,stdout); |
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509 | memmove(buffer,buffer2,framesize*2); |
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510 | |
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511 | for(i=0;i<2;i++){ |
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512 | for(j=0,k=framesize/2;j<framesize/2;j++,k++) |
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513 | out[i][j]=pcm[i][k]*window[k]; |
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514 | } |
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515 | frameno+=2; |
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516 | }else |
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517 | eos=1; |
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518 | } |
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519 | fprintf(stderr,"average raw bits of entropy: %.03g/sample\n",acc/tot); |
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520 | fprintf(stderr,"average nonzero samples: %.03g/%d\n",nonz/tot*framesize/2, |
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521 | framesize/2); |
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522 | fprintf(stderr,"Done\n\n"); |
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523 | return 0; |
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524 | } |
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