author | unc0rr |
Fri, 28 Oct 2011 19:20:35 +0400 | |
changeset 6223 | cc3eb9b7230f |
parent 5170 | f7e49eff3708 |
permissions | -rw-r--r-- |
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/******************************************************************** |
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* * |
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* THIS FILE IS PART OF THE OggVorbis 'TREMOR' CODEC SOURCE CODE. * |
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* * |
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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 'TREMOR' SOURCE CODE IS (C) COPYRIGHT 1994-2002 * |
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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: floor backend 0 implementation |
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********************************************************************/ |
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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 "ogg.h" |
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#include "ivorbiscodec.h" |
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#include "codec_internal.h" |
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#include "registry.h" |
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#include "codebook.h" |
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#include "misc.h" |
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#include "block.h" |
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#define LSP_FRACBITS 14 |
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typedef struct { |
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long n; |
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int ln; |
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int m; |
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int *linearmap; |
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vorbis_info_floor0 *vi; |
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ogg_int32_t *lsp_look; |
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} vorbis_look_floor0; |
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/*************** LSP decode ********************/ |
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#include "lsp_lookup.h" |
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/* interpolated 1./sqrt(p) where .5 <= a < 1. (.100000... to .111111...) in |
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16.16 format |
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returns in m.8 format */ |
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static long ADJUST_SQRT2[2]={8192,5792}; |
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STIN ogg_int32_t vorbis_invsqlook_i(long a,long e){ |
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long i=(a&0x7fff)>>(INVSQ_LOOKUP_I_SHIFT-1); |
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long d=a&INVSQ_LOOKUP_I_MASK; /* 0.10 */ |
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long val=INVSQ_LOOKUP_I[i]- /* 1.16 */ |
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((INVSQ_LOOKUP_IDel[i]*d)>>INVSQ_LOOKUP_I_SHIFT); /* result 1.16 */ |
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val*=ADJUST_SQRT2[e&1]; |
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e=(e>>1)+21; |
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return(val>>e); |
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} |
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/* interpolated lookup based fromdB function, domain -140dB to 0dB only */ |
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/* a is in n.12 format */ |
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STIN ogg_int32_t vorbis_fromdBlook_i(long a){ |
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int i=(-a)>>(12-FROMdB2_SHIFT); |
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if(i<0) return 0x7fffffff; |
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if(i>=(FROMdB_LOOKUP_SZ<<FROMdB_SHIFT))return 0; |
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return FROMdB_LOOKUP[i>>FROMdB_SHIFT] * FROMdB2_LOOKUP[i&FROMdB2_MASK]; |
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} |
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/* interpolated lookup based cos function, domain 0 to PI only */ |
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/* a is in 0.16 format, where 0==0, 2^^16-1==PI, return 0.14 */ |
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STIN ogg_int32_t vorbis_coslook_i(long a){ |
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int i=a>>COS_LOOKUP_I_SHIFT; |
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int d=a&COS_LOOKUP_I_MASK; |
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return COS_LOOKUP_I[i]- ((d*(COS_LOOKUP_I[i]-COS_LOOKUP_I[i+1]))>> |
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COS_LOOKUP_I_SHIFT); |
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} |
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/* interpolated lookup based cos function */ |
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/* a is in 0.16 format, where 0==0, 2^^16==PI, return .LSP_FRACBITS */ |
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STIN ogg_int32_t vorbis_coslook2_i(long a){ |
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a=a&0x1ffff; |
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if(a>0x10000)a=0x20000-a; |
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{ |
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int i=a>>COS_LOOKUP_I_SHIFT; |
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int d=a&COS_LOOKUP_I_MASK; |
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a=((COS_LOOKUP_I[i]<<COS_LOOKUP_I_SHIFT)- |
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d*(COS_LOOKUP_I[i]-COS_LOOKUP_I[i+1]))>> |
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(COS_LOOKUP_I_SHIFT-LSP_FRACBITS+14); |
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} |
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return(a); |
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} |
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static const int barklook[28]={ |
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0,100,200,301, 405,516,635,766, |
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912,1077,1263,1476, 1720,2003,2333,2721, |
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3184,3742,4428,5285, 6376,7791,9662,12181, |
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15624,20397,27087,36554 |
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}; |
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/* used in init only; interpolate the long way */ |
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STIN ogg_int32_t toBARK(int n){ |
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int i; |
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for(i=0;i<27;i++) |
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if(n>=barklook[i] && n<barklook[i+1])break; |
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if(i==27){ |
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return 27<<15; |
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}else{ |
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int gap=barklook[i+1]-barklook[i]; |
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int del=n-barklook[i]; |
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return((i<<15)+((del<<15)/gap)); |
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} |
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} |
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120 |
static const unsigned char MLOOP_1[64]={ |
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121 |
0,10,11,11, 12,12,12,12, 13,13,13,13, 13,13,13,13, |
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122 |
14,14,14,14, 14,14,14,14, 14,14,14,14, 14,14,14,14, |
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123 |
15,15,15,15, 15,15,15,15, 15,15,15,15, 15,15,15,15, |
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124 |
15,15,15,15, 15,15,15,15, 15,15,15,15, 15,15,15,15, |
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125 |
}; |
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126 |
|
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static const unsigned char MLOOP_2[64]={ |
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128 |
0,4,5,5, 6,6,6,6, 7,7,7,7, 7,7,7,7, |
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129 |
8,8,8,8, 8,8,8,8, 8,8,8,8, 8,8,8,8, |
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130 |
9,9,9,9, 9,9,9,9, 9,9,9,9, 9,9,9,9, |
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131 |
9,9,9,9, 9,9,9,9, 9,9,9,9, 9,9,9,9, |
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132 |
}; |
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133 |
|
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134 |
static const unsigned char MLOOP_3[8]={0,1,2,2,3,3,3,3}; |
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135 |
|
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136 |
void vorbis_lsp_to_curve(ogg_int32_t *curve,int *map,int n,int ln, |
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137 |
ogg_int32_t *lsp,int m, |
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138 |
ogg_int32_t amp, |
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139 |
ogg_int32_t ampoffset, |
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ogg_int32_t *icos){ |
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141 |
|
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142 |
/* 0 <= m < 256 */ |
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143 |
|
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144 |
/* set up for using all int later */ |
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145 |
int i; |
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int ampoffseti=ampoffset*4096; |
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int ampi=amp; |
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148 |
ogg_int32_t *ilsp=(ogg_int32_t *)alloca(m*sizeof(*ilsp)); |
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149 |
/* lsp is in 8.24, range 0 to PI; coslook wants it in .16 0 to 1*/ |
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150 |
for(i=0;i<m;i++){ |
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151 |
#ifndef _LOW_ACCURACY_ |
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ogg_int32_t val=MULT32(lsp[i],0x517cc2); |
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153 |
#else |
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ogg_int32_t val=((lsp[i]>>10)*0x517d)>>14; |
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155 |
#endif |
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156 |
|
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157 |
/* safeguard against a malicious stream */ |
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158 |
if(val<0 || (val>>COS_LOOKUP_I_SHIFT)>=COS_LOOKUP_I_SZ){ |
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159 |
memset(curve,0,sizeof(*curve)*n); |
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160 |
return; |
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161 |
} |
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162 |
|
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163 |
ilsp[i]=vorbis_coslook_i(val); |
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164 |
} |
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165 |
|
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166 |
i=0; |
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167 |
while(i<n){ |
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168 |
int j,k=map[i]; |
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169 |
ogg_uint32_t pi=46341; /* 2**-.5 in 0.16 */ |
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170 |
ogg_uint32_t qi=46341; |
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171 |
ogg_int32_t qexp=0,shift; |
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172 |
ogg_int32_t wi=icos[k]; |
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173 |
|
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174 |
#ifdef _V_LSP_MATH_ASM |
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175 |
lsp_loop_asm(&qi,&pi,&qexp,ilsp,wi,m); |
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176 |
|
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pi=((pi*pi)>>16); |
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qi=((qi*qi)>>16); |
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179 |
|
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180 |
if(m&1){ |
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181 |
qexp= qexp*2-28*((m+1)>>1)+m; |
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182 |
pi*=(1<<14)-((wi*wi)>>14); |
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183 |
qi+=pi>>14; |
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184 |
}else{ |
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185 |
qexp= qexp*2-13*m; |
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186 |
|
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187 |
pi*=(1<<14)-wi; |
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188 |
qi*=(1<<14)+wi; |
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189 |
|
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190 |
qi=(qi+pi)>>14; |
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191 |
} |
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192 |
|
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193 |
if(qi&0xffff0000){ /* checks for 1.xxxxxxxxxxxxxxxx */ |
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194 |
qi>>=1; qexp++; |
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195 |
}else |
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196 |
lsp_norm_asm(&qi,&qexp); |
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197 |
|
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198 |
#else |
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199 |
|
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200 |
qi*=labs(ilsp[0]-wi); |
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201 |
pi*=labs(ilsp[1]-wi); |
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202 |
|
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203 |
for(j=3;j<m;j+=2){ |
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204 |
if(!(shift=MLOOP_1[(pi|qi)>>25])) |
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205 |
if(!(shift=MLOOP_2[(pi|qi)>>19])) |
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206 |
shift=MLOOP_3[(pi|qi)>>16]; |
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207 |
qi=(qi>>shift)*labs(ilsp[j-1]-wi); |
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208 |
pi=(pi>>shift)*labs(ilsp[j]-wi); |
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209 |
qexp+=shift; |
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210 |
} |
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211 |
if(!(shift=MLOOP_1[(pi|qi)>>25])) |
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212 |
if(!(shift=MLOOP_2[(pi|qi)>>19])) |
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shift=MLOOP_3[(pi|qi)>>16]; |
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214 |
|
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215 |
/* pi,qi normalized collectively, both tracked using qexp */ |
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216 |
|
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if(m&1){ |
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218 |
/* odd order filter; slightly assymetric */ |
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219 |
/* the last coefficient */ |
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qi=(qi>>shift)*labs(ilsp[j-1]-wi); |
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pi=(pi>>shift)<<14; |
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222 |
qexp+=shift; |
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223 |
|
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224 |
if(!(shift=MLOOP_1[(pi|qi)>>25])) |
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225 |
if(!(shift=MLOOP_2[(pi|qi)>>19])) |
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shift=MLOOP_3[(pi|qi)>>16]; |
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227 |
|
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pi>>=shift; |
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229 |
qi>>=shift; |
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qexp+=shift-14*((m+1)>>1); |
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231 |
|
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pi=((pi*pi)>>16); |
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qi=((qi*qi)>>16); |
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qexp=qexp*2+m; |
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235 |
|
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236 |
pi*=(1<<14)-((wi*wi)>>14); |
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237 |
qi+=pi>>14; |
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238 |
|
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|
239 |
}else{ |
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240 |
/* even order filter; still symmetric */ |
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|
241 |
|
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|
242 |
/* p*=p(1-w), q*=q(1+w), let normalization drift because it isn't |
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|
243 |
worth tracking step by step */ |
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|
244 |
|
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245 |
pi>>=shift; |
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|
246 |
qi>>=shift; |
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247 |
qexp+=shift-7*m; |
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|
248 |
|
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249 |
pi=((pi*pi)>>16); |
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250 |
qi=((qi*qi)>>16); |
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251 |
qexp=qexp*2+m; |
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|
252 |
|
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253 |
pi*=(1<<14)-wi; |
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254 |
qi*=(1<<14)+wi; |
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255 |
qi=(qi+pi)>>14; |
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|
256 |
|
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|
257 |
} |
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|
258 |
|
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|
259 |
|
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260 |
/* we've let the normalization drift because it wasn't important; |
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|
261 |
however, for the lookup, things must be normalized again. We |
f7e49eff3708
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|
262 |
need at most one right shift or a number of left shifts */ |
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|
263 |
|
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|
264 |
if(qi&0xffff0000){ /* checks for 1.xxxxxxxxxxxxxxxx */ |
f7e49eff3708
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|
265 |
qi>>=1; qexp++; |
f7e49eff3708
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|
266 |
}else |
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|
267 |
while(qi && !(qi&0x8000)){ /* checks for 0.0xxxxxxxxxxxxxxx or less*/ |
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|
268 |
qi<<=1; qexp--; |
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|
269 |
} |
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|
270 |
|
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|
271 |
#endif |
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|
272 |
|
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273 |
amp=vorbis_fromdBlook_i(ampi* /* n.4 */ |
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|
274 |
vorbis_invsqlook_i(qi,qexp)- |
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275 |
/* m.8, m+n<=8 */ |
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|
276 |
ampoffseti); /* 8.12[0] */ |
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|
277 |
|
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|
278 |
#ifdef _LOW_ACCURACY_ |
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|
279 |
amp>>=9; |
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|
280 |
#endif |
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|
281 |
curve[i]= MULT31_SHIFT15(curve[i],amp); |
f7e49eff3708
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|
282 |
while(map[++i]==k) curve[i]= MULT31_SHIFT15(curve[i],amp); |
f7e49eff3708
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|
283 |
} |
f7e49eff3708
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|
284 |
} |
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|
285 |
|
f7e49eff3708
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|
286 |
/*************** vorbis decode glue ************/ |
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|
287 |
|
f7e49eff3708
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|
288 |
static void floor0_free_info(vorbis_info_floor *i){ |
f7e49eff3708
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|
289 |
vorbis_info_floor0 *info=(vorbis_info_floor0 *)i; |
f7e49eff3708
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|
290 |
if(info){ |
f7e49eff3708
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|
291 |
memset(info,0,sizeof(*info)); |
f7e49eff3708
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|
292 |
_ogg_free(info); |
f7e49eff3708
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|
293 |
} |
f7e49eff3708
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diff
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|
294 |
} |
f7e49eff3708
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diff
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|
295 |
|
f7e49eff3708
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|
296 |
static void floor0_free_look(vorbis_look_floor *i){ |
f7e49eff3708
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|
297 |
vorbis_look_floor0 *look=(vorbis_look_floor0 *)i; |
f7e49eff3708
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koda
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|
298 |
if(look){ |
f7e49eff3708
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|
299 |
|
f7e49eff3708
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|
300 |
if(look->linearmap)_ogg_free(look->linearmap); |
f7e49eff3708
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|
301 |
if(look->lsp_look)_ogg_free(look->lsp_look); |
f7e49eff3708
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|
302 |
memset(look,0,sizeof(*look)); |
f7e49eff3708
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koda
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|
303 |
_ogg_free(look); |
f7e49eff3708
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diff
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|
304 |
} |
f7e49eff3708
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koda
parents:
diff
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|
305 |
} |
f7e49eff3708
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koda
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diff
changeset
|
306 |
|
f7e49eff3708
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|
307 |
static vorbis_info_floor *floor0_unpack (vorbis_info *vi,oggpack_buffer *opb){ |
f7e49eff3708
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|
308 |
codec_setup_info *ci=(codec_setup_info *)vi->codec_setup; |
f7e49eff3708
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diff
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|
309 |
int j; |
f7e49eff3708
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diff
changeset
|
310 |
|
f7e49eff3708
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|
311 |
vorbis_info_floor0 *info=(vorbis_info_floor0 *)_ogg_malloc(sizeof(*info)); |
f7e49eff3708
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|
312 |
info->order=oggpack_read(opb,8); |
f7e49eff3708
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diff
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|
313 |
info->rate=oggpack_read(opb,16); |
f7e49eff3708
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|
314 |
info->barkmap=oggpack_read(opb,16); |
f7e49eff3708
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diff
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|
315 |
info->ampbits=oggpack_read(opb,6); |
f7e49eff3708
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|
316 |
info->ampdB=oggpack_read(opb,8); |
f7e49eff3708
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diff
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|
317 |
info->numbooks=oggpack_read(opb,4)+1; |
f7e49eff3708
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koda
parents:
diff
changeset
|
318 |
|
f7e49eff3708
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diff
changeset
|
319 |
if(info->order<1)goto err_out; |
f7e49eff3708
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koda
parents:
diff
changeset
|
320 |
if(info->rate<1)goto err_out; |
f7e49eff3708
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koda
parents:
diff
changeset
|
321 |
if(info->barkmap<1)goto err_out; |
f7e49eff3708
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koda
parents:
diff
changeset
|
322 |
if(info->numbooks<1)goto err_out; |
f7e49eff3708
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koda
parents:
diff
changeset
|
323 |
|
f7e49eff3708
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parents:
diff
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|
324 |
for(j=0;j<info->numbooks;j++){ |
f7e49eff3708
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koda
parents:
diff
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|
325 |
info->books[j]=oggpack_read(opb,8); |
f7e49eff3708
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koda
parents:
diff
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|
326 |
if(info->books[j]<0 || info->books[j]>=ci->books)goto err_out; |
f7e49eff3708
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parents:
diff
changeset
|
327 |
} |
f7e49eff3708
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parents:
diff
changeset
|
328 |
return(info); |
f7e49eff3708
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parents:
diff
changeset
|
329 |
|
f7e49eff3708
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koda
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diff
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|
330 |
err_out: |
f7e49eff3708
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koda
parents:
diff
changeset
|
331 |
floor0_free_info(info); |
f7e49eff3708
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koda
parents:
diff
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|
332 |
return(NULL); |
f7e49eff3708
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koda
parents:
diff
changeset
|
333 |
} |
f7e49eff3708
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koda
parents:
diff
changeset
|
334 |
|
f7e49eff3708
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koda
parents:
diff
changeset
|
335 |
/* initialize Bark scale and normalization lookups. We could do this |
f7e49eff3708
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parents:
diff
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|
336 |
with static tables, but Vorbis allows a number of possible |
f7e49eff3708
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koda
parents:
diff
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|
337 |
combinations, so it's best to do it computationally. |
f7e49eff3708
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parents:
diff
changeset
|
338 |
|
f7e49eff3708
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koda
parents:
diff
changeset
|
339 |
The below is authoritative in terms of defining scale mapping. |
f7e49eff3708
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koda
parents:
diff
changeset
|
340 |
Note that the scale depends on the sampling rate as well as the |
f7e49eff3708
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koda
parents:
diff
changeset
|
341 |
linear block and mapping sizes */ |
f7e49eff3708
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koda
parents:
diff
changeset
|
342 |
|
f7e49eff3708
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koda
parents:
diff
changeset
|
343 |
static vorbis_look_floor *floor0_look (vorbis_dsp_state *vd,vorbis_info_mode *mi, |
f7e49eff3708
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diff
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|
344 |
vorbis_info_floor *i){ |
f7e49eff3708
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diff
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|
345 |
int j; |
f7e49eff3708
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diff
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|
346 |
vorbis_info *vi=vd->vi; |
f7e49eff3708
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|
347 |
codec_setup_info *ci=(codec_setup_info *)vi->codec_setup; |
f7e49eff3708
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parents:
diff
changeset
|
348 |
vorbis_info_floor0 *info=(vorbis_info_floor0 *)i; |
f7e49eff3708
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parents:
diff
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|
349 |
vorbis_look_floor0 *look=(vorbis_look_floor0 *)_ogg_calloc(1,sizeof(*look)); |
f7e49eff3708
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diff
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|
350 |
look->m=info->order; |
f7e49eff3708
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diff
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|
351 |
look->n=ci->blocksizes[mi->blockflag]/2; |
f7e49eff3708
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koda
parents:
diff
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|
352 |
look->ln=info->barkmap; |
f7e49eff3708
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koda
parents:
diff
changeset
|
353 |
look->vi=info; |
f7e49eff3708
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koda
parents:
diff
changeset
|
354 |
|
f7e49eff3708
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koda
parents:
diff
changeset
|
355 |
/* the mapping from a linear scale to a smaller bark scale is |
f7e49eff3708
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koda
parents:
diff
changeset
|
356 |
straightforward. We do *not* make sure that the linear mapping |
f7e49eff3708
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koda
parents:
diff
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|
357 |
does not skip bark-scale bins; the decoder simply skips them and |
f7e49eff3708
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koda
parents:
diff
changeset
|
358 |
the encoder may do what it wishes in filling them. They're |
f7e49eff3708
add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff
changeset
|
359 |
necessary in some mapping combinations to keep the scale spacing |
f7e49eff3708
add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
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|
360 |
accurate */ |
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|
361 |
look->linearmap=(int *)_ogg_malloc((look->n+1)*sizeof(*look->linearmap)); |
f7e49eff3708
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|
362 |
for(j=0;j<look->n;j++){ |
f7e49eff3708
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parents:
diff
changeset
|
363 |
|
f7e49eff3708
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koda
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|
364 |
int val=(look->ln* |
f7e49eff3708
add libTremor sources (integer-only libvorbis implementation) to repo and ios project
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|
365 |
((toBARK(info->rate/2*j/look->n)<<11)/toBARK(info->rate/2)))>>11; |
f7e49eff3708
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parents:
diff
changeset
|
366 |
|
f7e49eff3708
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|
367 |
if(val>=look->ln)val=look->ln-1; /* guard against the approximation */ |
f7e49eff3708
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|
368 |
look->linearmap[j]=val; |
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|
369 |
} |
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370 |
look->linearmap[j]=-1; |
f7e49eff3708
add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff
changeset
|
371 |
|
f7e49eff3708
add libTremor sources (integer-only libvorbis implementation) to repo and ios project
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|
372 |
look->lsp_look=(ogg_int32_t *)_ogg_malloc(look->ln*sizeof(*look->lsp_look)); |
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|
373 |
for(j=0;j<look->ln;j++) |
f7e49eff3708
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|
374 |
look->lsp_look[j]=vorbis_coslook2_i(0x10000*j/look->ln); |
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|
375 |
|
f7e49eff3708
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|
376 |
return look; |
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|
377 |
} |
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koda
parents:
diff
changeset
|
378 |
|
f7e49eff3708
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|
379 |
static void *floor0_inverse1(vorbis_block *vb,vorbis_look_floor *i){ |
f7e49eff3708
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|
380 |
vorbis_look_floor0 *look=(vorbis_look_floor0 *)i; |
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parents:
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|
381 |
vorbis_info_floor0 *info=look->vi; |
f7e49eff3708
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koda
parents:
diff
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|
382 |
int j,k; |
f7e49eff3708
add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff
changeset
|
383 |
|
f7e49eff3708
add libTremor sources (integer-only libvorbis implementation) to repo and ios project
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parents:
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|
384 |
int ampraw=oggpack_read(&vb->opb,info->ampbits); |
f7e49eff3708
add libTremor sources (integer-only libvorbis implementation) to repo and ios project
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parents:
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|
385 |
if(ampraw>0){ /* also handles the -1 out of data case */ |
f7e49eff3708
add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
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|
386 |
long maxval=(1<<info->ampbits)-1; |
f7e49eff3708
add libTremor sources (integer-only libvorbis implementation) to repo and ios project
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|
387 |
int amp=((ampraw*info->ampdB)<<4)/maxval; |
f7e49eff3708
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koda
parents:
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|
388 |
int booknum=oggpack_read(&vb->opb,_ilog(info->numbooks)); |
f7e49eff3708
add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff
changeset
|
389 |
|
f7e49eff3708
add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff
changeset
|
390 |
if(booknum!=-1 && booknum<info->numbooks){ /* be paranoid */ |
f7e49eff3708
add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff
changeset
|
391 |
codec_setup_info *ci=(codec_setup_info *)vb->vd->vi->codec_setup; |
f7e49eff3708
add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff
changeset
|
392 |
codebook *b=ci->fullbooks+info->books[booknum]; |
f7e49eff3708
add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff
changeset
|
393 |
ogg_int32_t last=0; |
f7e49eff3708
add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff
changeset
|
394 |
ogg_int32_t *lsp=(ogg_int32_t *)_vorbis_block_alloc(vb,sizeof(*lsp)*(look->m+1)); |
f7e49eff3708
add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff
changeset
|
395 |
|
f7e49eff3708
add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff
changeset
|
396 |
for(j=0;j<look->m;j+=b->dim) |
f7e49eff3708
add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff
changeset
|
397 |
if(vorbis_book_decodev_set(b,lsp+j,&vb->opb,b->dim,-24)==-1)goto eop; |
f7e49eff3708
add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff
changeset
|
398 |
for(j=0;j<look->m;){ |
f7e49eff3708
add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff
changeset
|
399 |
for(k=0;k<b->dim;k++,j++)lsp[j]+=last; |
f7e49eff3708
add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff
changeset
|
400 |
last=lsp[j-1]; |
f7e49eff3708
add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff
changeset
|
401 |
} |
f7e49eff3708
add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff
changeset
|
402 |
|
f7e49eff3708
add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff
changeset
|
403 |
lsp[look->m]=amp; |
f7e49eff3708
add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff
changeset
|
404 |
return(lsp); |
f7e49eff3708
add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff
changeset
|
405 |
} |
f7e49eff3708
add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff
changeset
|
406 |
} |
f7e49eff3708
add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff
changeset
|
407 |
eop: |
f7e49eff3708
add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff
changeset
|
408 |
return(NULL); |
f7e49eff3708
add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff
changeset
|
409 |
} |
f7e49eff3708
add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff
changeset
|
410 |
|
f7e49eff3708
add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff
changeset
|
411 |
static int floor0_inverse2(vorbis_block *vb,vorbis_look_floor *i, |
f7e49eff3708
add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff
changeset
|
412 |
void *memo,ogg_int32_t *out){ |
f7e49eff3708
add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff
changeset
|
413 |
vorbis_look_floor0 *look=(vorbis_look_floor0 *)i; |
f7e49eff3708
add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff
changeset
|
414 |
vorbis_info_floor0 *info=look->vi; |
f7e49eff3708
add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff
changeset
|
415 |
|
f7e49eff3708
add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff
changeset
|
416 |
if(memo){ |
f7e49eff3708
add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff
changeset
|
417 |
ogg_int32_t *lsp=(ogg_int32_t *)memo; |
f7e49eff3708
add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff
changeset
|
418 |
ogg_int32_t amp=lsp[look->m]; |
f7e49eff3708
add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff
changeset
|
419 |
|
f7e49eff3708
add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff
changeset
|
420 |
/* take the coefficients back to a spectral envelope curve */ |
f7e49eff3708
add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff
changeset
|
421 |
vorbis_lsp_to_curve(out,look->linearmap,look->n,look->ln, |
f7e49eff3708
add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff
changeset
|
422 |
lsp,look->m,amp,info->ampdB,look->lsp_look); |
f7e49eff3708
add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff
changeset
|
423 |
return(1); |
f7e49eff3708
add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff
changeset
|
424 |
} |
f7e49eff3708
add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff
changeset
|
425 |
memset(out,0,sizeof(*out)*look->n); |
f7e49eff3708
add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff
changeset
|
426 |
return(0); |
f7e49eff3708
add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff
changeset
|
427 |
} |
f7e49eff3708
add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff
changeset
|
428 |
|
f7e49eff3708
add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff
changeset
|
429 |
/* export hooks */ |
f7e49eff3708
add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff
changeset
|
430 |
vorbis_func_floor floor0_exportbundle={ |
f7e49eff3708
add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff
changeset
|
431 |
&floor0_unpack,&floor0_look,&floor0_free_info, |
f7e49eff3708
add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff
changeset
|
432 |
&floor0_free_look,&floor0_inverse1,&floor0_inverse2 |
f7e49eff3708
add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff
changeset
|
433 |
}; |
f7e49eff3708
add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff
changeset
|
434 |
|
f7e49eff3708
add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff
changeset
|
435 |