guliverkli: C:/guliverkli/src/filters/transform/mpadecfilter/faad2/libfaad/sbr

00001 /*
00002 ** FAAD2 - Freeware Advanced Audio (AAC) Decoder including SBR decoding
00003 ** Copyright (C) 2003-2005 M. Bakker, Ahead Software AG, http://www.nero.com
00004 **  
00005 ** This program is free software; you can redistribute it and/or modify
00006 ** it under the terms of the GNU General Public License as published by
00007 ** the Free Software Foundation; either version 2 of the License, or
00008 ** (at your option) any later version.
00009 ** 
00010 ** This program is distributed in the hope that it will be useful,
00011 ** but WITHOUT ANY WARRANTY; without even the implied warranty of
00012 ** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
00013 ** GNU General Public License for more details.
00014 ** 
00015 ** You should have received a copy of the GNU General Public License
00016 ** along with this program; if not, write to the Free Software 
00017 ** Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
00018 **
00019 ** Any non-GPL usage of this software or parts of this software is strictly
00020 ** forbidden.
00021 **
00022 ** Software using this code must display the following message visibly in the
00023 ** software:
00024 ** "FAAD2 AAC/HE-AAC/HE-AACv2/DRM decoder (c) Ahead Software, www.nero.com"
00025 ** in, for example, the about-box or help/startup screen.
00026 **
00027 ** Commercial non-GPL licensing of this software is possible.
00028 ** For more info contact Ahead Software through [email protected].
00029 **
00030 ** $Id: sbr_huff.c,v 1.2 2005/11/01 21:41:43 gabest Exp $
00031 **/
00032 
00033 #include "common.h"
00034 #include "structs.h"
00035 
00036 #ifdef SBR_DEC
00037 
00038 #include "sbr_syntax.h"
00039 #include "bits.h"
00040 #include "sbr_huff.h"
00041 #include "sbr_e_nf.h"
00042 
00043 
00044 typedef const int8_t (*sbr_huff_tab)[2];
00045 
00046 static const int8_t t_huffman_env_1_5dB[120][2] = {
00047     {   1,   2 },    { -64, -65 },    {   3,   4 },    { -63, -66 },
00048     {   5,   6 },    { -62, -67 },    {   7,   8 },    { -61, -68 },
00049     {   9,  10 },    { -60, -69 },    {  11,  12 },    { -59, -70 },
00050     {  13,  14 },    { -58, -71 },    {  15,  16 },    { -57, -72 },
00051     {  17,  18 },    { -73, -56 },    {  19,  21 },    { -74,  20 },
00052     { -55, -75 },    {  22,  26 },    {  23,  24 },    { -54, -76 },
00053     { -77,  25 },    { -53, -78 },    {  27,  34 },    {  28,  29 },
00054     { -52, -79 },    {  30,  31 },    { -80, -51 },    {  32,  33 },
00055     { -83, -82 },    { -81, -50 },    {  35,  57 },    {  36,  40 },
00056     {  37,  38 },    { -88, -84 },    { -48,  39 },    { -90, -85 },
00057     {  41,  46 },    {  42,  43 },    { -49, -87 },    {  44,  45 },
00058     { -89, -86 },    {-124,-123 },    {  47,  50 },    {  48,  49 },
00059     {-122,-121 },    {-120,-119 },    {  51,  54 },    {  52,  53 },
00060     {-118,-117 },    {-116,-115 },    {  55,  56 },    {-114,-113 },
00061     {-112,-111 },    {  58,  89 },    {  59,  74 },    {  60,  67 },
00062     {  61,  64 },    {  62,  63 },    {-110,-109 },    {-108,-107 },
00063     {  65,  66 },    {-106,-105 },    {-104,-103 },    {  68,  71 },
00064     {  69,  70 },    {-102,-101 },    {-100, -99 },    {  72,  73 },
00065     { -98, -97 },    { -96, -95 },    {  75,  82 },    {  76,  79 },
00066     {  77,  78 },    { -94, -93 },    { -92, -91 },    {  80,  81 },
00067     { -47, -46 },    { -45, -44 },    {  83,  86 },    {  84,  85 },
00068     { -43, -42 },    { -41, -40 },    {  87,  88 },    { -39, -38 },
00069     { -37, -36 },    {  90, 105 },    {  91,  98 },    {  92,  95 },
00070     {  93,  94 },    { -35, -34 },    { -33, -32 },    {  96,  97 },
00071     { -31, -30 },    { -29, -28 },    {  99, 102 },    { 100, 101 },
00072     { -27, -26 },    { -25, -24 },    { 103, 104 },    { -23, -22 },
00073     { -21, -20 },    { 106, 113 },    { 107, 110 },    { 108, 109 },
00074     { -19, -18 },    { -17, -16 },    { 111, 112 },    { -15, -14 },
00075     { -13, -12 },    { 114, 117 },    { 115, 116 },    { -11, -10 },
00076     {  -9,  -8 },    { 118, 119 },    {  -7,  -6 },    {  -5,  -4 }
00077 };
00078 
00079 static const int8_t f_huffman_env_1_5dB[120][2] = {
00080     {   1,   2 },    { -64, -65 },    {   3,   4 },    { -63, -66 },
00081     {   5,   6 },    { -67, -62 },    {   7,   8 },    { -68, -61 },
00082     {   9,  10 },    { -69, -60 },    {  11,  13 },    { -70,  12 },
00083     { -59, -71 },    {  14,  16 },    { -58,  15 },    { -72, -57 },
00084     {  17,  19 },    { -73,  18 },    { -56, -74 },    {  20,  23 },
00085     {  21,  22 },    { -55, -75 },    { -54, -53 },    {  24,  27 },
00086     {  25,  26 },    { -76, -52 },    { -77, -51 },    {  28,  31 },
00087     {  29,  30 },    { -50, -78 },    { -79, -49 },    {  32,  36 },
00088     {  33,  34 },    { -48, -47 },    { -80,  35 },    { -81, -82 },
00089     {  37,  47 },    {  38,  41 },    {  39,  40 },    { -83, -46 },
00090     { -45, -84 },    {  42,  44 },    { -85,  43 },    { -44, -43 },
00091     {  45,  46 },    { -88, -87 },    { -86, -90 },    {  48,  66 },
00092     {  49,  56 },    {  50,  53 },    {  51,  52 },    { -92, -42 },
00093     { -41, -39 },    {  54,  55 },    {-105, -89 },    { -38, -37 },
00094     {  57,  60 },    {  58,  59 },    { -94, -91 },    { -40, -36 },
00095     {  61,  63 },    { -20,  62 },    {-115,-110 },    {  64,  65 },
00096     {-108,-107 },    {-101, -97 },    {  67,  89 },    {  68,  75 },
00097     {  69,  72 },    {  70,  71 },    { -95, -93 },    { -34, -27 },
00098     {  73,  74 },    { -22, -17 },    { -16,-124 },    {  76,  82 },
00099     {  77,  79 },    {-123,  78 },    {-122,-121 },    {  80,  81 },
00100     {-120,-119 },    {-118,-117 },    {  83,  86 },    {  84,  85 },
00101     {-116,-114 },    {-113,-112 },    {  87,  88 },    {-111,-109 },
00102     {-106,-104 },    {  90, 105 },    {  91,  98 },    {  92,  95 },
00103     {  93,  94 },    {-103,-102 },    {-100, -99 },    {  96,  97 },
00104     { -98, -96 },    { -35, -33 },    {  99, 102 },    { 100, 101 },
00105     { -32, -31 },    { -30, -29 },    { 103, 104 },    { -28, -26 },
00106     { -25, -24 },    { 106, 113 },    { 107, 110 },    { 108, 109 },
00107     { -23, -21 },    { -19, -18 },    { 111, 112 },    { -15, -14 },
00108     { -13, -12 },    { 114, 117 },    { 115, 116 },    { -11, -10 },
00109     {  -9,  -8 },    { 118, 119 },    {  -7,  -6 },    {  -5,  -4 }
00110 };
00111 
00112 static const int8_t t_huffman_env_bal_1_5dB[48][2] = {
00113     { -64,   1 },    { -63,   2 },    { -65,   3 },    { -62,   4 },
00114     { -66,   5 },    { -61,   6 },    { -67,   7 },    { -60,   8 },
00115     { -68,   9 },    {  10,  11 },    { -69, -59 },    {  12,  13 },
00116     { -70, -58 },    {  14,  28 },    {  15,  21 },    {  16,  18 },
00117     { -57,  17 },    { -71, -56 },    {  19,  20 },    { -88, -87 },
00118     { -86, -85 },    {  22,  25 },    {  23,  24 },    { -84, -83 },
00119     { -82, -81 },    {  26,  27 },    { -80, -79 },    { -78, -77 },
00120     {  29,  36 },    {  30,  33 },    {  31,  32 },    { -76, -75 },
00121     { -74, -73 },    {  34,  35 },    { -72, -55 },    { -54, -53 },
00122     {  37,  41 },    {  38,  39 },    { -52, -51 },    { -50,  40 },
00123     { -49, -48 },    {  42,  45 },    {  43,  44 },    { -47, -46 },
00124     { -45, -44 },    {  46,  47 },    { -43, -42 },    { -41, -40 }
00125 };
00126 
00127 static const int8_t f_huffman_env_bal_1_5dB[48][2] = {
00128     { -64,   1 },    { -65,   2 },    { -63,   3 },    { -66,   4 },
00129     { -62,   5 },    { -61,   6 },    { -67,   7 },    { -68,   8 },
00130     { -60,   9 },    {  10,  11 },    { -69, -59 },    { -70,  12 },
00131     { -58,  13 },    {  14,  17 },    { -71,  15 },    { -57,  16 },
00132     { -56, -73 },    {  18,  32 },    {  19,  25 },    {  20,  22 },
00133     { -72,  21 },    { -88, -87 },    {  23,  24 },    { -86, -85 },
00134     { -84, -83 },    {  26,  29 },    {  27,  28 },    { -82, -81 },
00135     { -80, -79 },    {  30,  31 },    { -78, -77 },    { -76, -75 },
00136     {  33,  40 },    {  34,  37 },    {  35,  36 },    { -74, -55 },
00137     { -54, -53 },    {  38,  39 },    { -52, -51 },    { -50, -49 },
00138     {  41,  44 },    {  42,  43 },    { -48, -47 },    { -46, -45 },
00139     {  45,  46 },    { -44, -43 },    { -42,  47 },    { -41, -40 }
00140 };
00141 
00142 static const int8_t t_huffman_env_3_0dB[62][2] = {
00143     { -64,   1 },    { -65,   2 },    { -63,   3 },    { -66,   4 },
00144     { -62,   5 },    { -67,   6 },    { -61,   7 },    { -68,   8 },
00145     { -60,   9 },    {  10,  11 },    { -69, -59 },    {  12,  14 },
00146     { -70,  13 },    { -71, -58 },    {  15,  18 },    {  16,  17 },
00147     { -72, -57 },    { -73, -74 },    {  19,  22 },    { -56,  20 },
00148     { -55,  21 },    { -54, -77 },    {  23,  31 },    {  24,  25 },
00149     { -75, -76 },    {  26,  27 },    { -78, -53 },    {  28,  29 },
00150     { -52, -95 },    { -94,  30 },    { -93, -92 },    {  32,  47 },
00151     {  33,  40 },    {  34,  37 },    {  35,  36 },    { -91, -90 },
00152     { -89, -88 },    {  38,  39 },    { -87, -86 },    { -85, -84 },
00153     {  41,  44 },    {  42,  43 },    { -83, -82 },    { -81, -80 },
00154     {  45,  46 },    { -79, -51 },    { -50, -49 },    {  48,  55 },
00155     {  49,  52 },    {  50,  51 },    { -48, -47 },    { -46, -45 },
00156     {  53,  54 },    { -44, -43 },    { -42, -41 },    {  56,  59 },
00157     {  57,  58 },    { -40, -39 },    { -38, -37 },    {  60,  61 },
00158     { -36, -35 },    { -34, -33 }
00159 };
00160 
00161 static const int8_t f_huffman_env_3_0dB[62][2] = {
00162     { -64,   1 },    { -65,   2 },    { -63,   3 },    { -66,   4 },
00163     { -62,   5 },    { -67,   6 },    {   7,   8 },    { -61, -68 },
00164     {   9,  10 },    { -60, -69 },    {  11,  12 },    { -59, -70 },
00165     {  13,  14 },    { -58, -71 },    {  15,  16 },    { -57, -72 },
00166     {  17,  19 },    { -56,  18 },    { -55, -73 },    {  20,  24 },
00167     {  21,  22 },    { -74, -54 },    { -53,  23 },    { -75, -76 },
00168     {  25,  30 },    {  26,  27 },    { -52, -51 },    {  28,  29 },
00169     { -77, -79 },    { -50, -49 },    {  31,  39 },    {  32,  35 },
00170     {  33,  34 },    { -78, -46 },    { -82, -88 },    {  36,  37 },
00171     { -83, -48 },    { -47,  38 },    { -86, -85 },    {  40,  47 },
00172     {  41,  44 },    {  42,  43 },    { -80, -44 },    { -43, -42 },
00173     {  45,  46 },    { -39, -87 },    { -84, -40 },    {  48,  55 },
00174     {  49,  52 },    {  50,  51 },    { -95, -94 },    { -93, -92 },
00175     {  53,  54 },    { -91, -90 },    { -89, -81 },    {  56,  59 },
00176     {  57,  58 },    { -45, -41 },    { -38, -37 },    {  60,  61 },
00177     { -36, -35 },    { -34, -33 }
00178 };
00179 
00180 static const int8_t t_huffman_env_bal_3_0dB[24][2] = {
00181     { -64,   1 },    { -63,   2 },    { -65,   3 },    { -66,   4 },
00182     { -62,   5 },    { -61,   6 },    { -67,   7 },    { -68,   8 },
00183     { -60,   9 },    {  10,  16 },    {  11,  13 },    { -69,  12 },
00184     { -76, -75 },    {  14,  15 },    { -74, -73 },    { -72, -71 },
00185     {  17,  20 },    {  18,  19 },    { -70, -59 },    { -58, -57 },
00186     {  21,  22 },    { -56, -55 },    { -54,  23 },    { -53, -52 }
00187 };
00188 
00189 static const int8_t f_huffman_env_bal_3_0dB[24][2] = {
00190     { -64,   1 },    { -65,   2 },    { -63,   3 },    { -66,   4 },
00191     { -62,   5 },    { -61,   6 },    { -67,   7 },    { -68,   8 },
00192     { -60,   9 },    {  10,  13 },    { -69,  11 },    { -59,  12 },
00193     { -58, -76 },    {  14,  17 },    {  15,  16 },    { -75, -74 },
00194     { -73, -72 },    {  18,  21 },    {  19,  20 },    { -71, -70 },
00195     { -57, -56 },    {  22,  23 },    { -55, -54 },    { -53, -52 }
00196 };
00197 
00198 static const int8_t t_huffman_noise_3_0dB[62][2] = {
00199     { -64,   1 },    { -63,   2 },    { -65,   3 },    { -66,   4 },
00200     { -62,   5 },    { -67,   6 },    {   7,   8 },    { -61, -68 },
00201     {   9,  30 },    {  10,  15 },    { -60,  11 },    { -69,  12 },
00202     {  13,  14 },    { -59, -53 },    { -95, -94 },    {  16,  23 },
00203     {  17,  20 },    {  18,  19 },    { -93, -92 },    { -91, -90 },
00204     {  21,  22 },    { -89, -88 },    { -87, -86 },    {  24,  27 },
00205     {  25,  26 },    { -85, -84 },    { -83, -82 },    {  28,  29 },
00206     { -81, -80 },    { -79, -78 },    {  31,  46 },    {  32,  39 },
00207     {  33,  36 },    {  34,  35 },    { -77, -76 },    { -75, -74 },
00208     {  37,  38 },    { -73, -72 },    { -71, -70 },    {  40,  43 },
00209     {  41,  42 },    { -58, -57 },    { -56, -55 },    {  44,  45 },
00210     { -54, -52 },    { -51, -50 },    {  47,  54 },    {  48,  51 },
00211     {  49,  50 },    { -49, -48 },    { -47, -46 },    {  52,  53 },
00212     { -45, -44 },    { -43, -42 },    {  55,  58 },    {  56,  57 },
00213     { -41, -40 },    { -39, -38 },    {  59,  60 },    { -37, -36 },
00214     { -35,  61 },    { -34, -33 }
00215 };
00216 
00217 static const int8_t t_huffman_noise_bal_3_0dB[24][2] = {
00218     { -64,   1 },    { -65,   2 },    { -63,   3 },    {   4,   9 },
00219     { -66,   5 },    { -62,   6 },    {   7,   8 },    { -76, -75 },
00220     { -74, -73 },    {  10,  17 },    {  11,  14 },    {  12,  13 },
00221     { -72, -71 },    { -70, -69 },    {  15,  16 },    { -68, -67 },
00222     { -61, -60 },    {  18,  21 },    {  19,  20 },    { -59, -58 },
00223     { -57, -56 },    {  22,  23 },    { -55, -54 },    { -53, -52 }
00224 };
00225 
00226 
00227 static INLINE int16_t sbr_huff_dec(bitfile *ld, sbr_huff_tab t_huff)
00228 {
00229     uint8_t bit;
00230     int16_t index = 0;
00231 
00232     while (index >= 0)
00233     {
00234         bit = (uint8_t)faad_get1bit(ld);
00235         index = t_huff[index][bit];
00236     }
00237 
00238     return index + 64;
00239 }
00240 
00241 /* table 10 */
00242 void sbr_envelope(bitfile *ld, sbr_info *sbr, uint8_t ch)
00243 {
00244     uint8_t env, band;
00245     int8_t delta = 0;
00246     sbr_huff_tab t_huff, f_huff;
00247 
00248     if ((sbr->L_E[ch] == 1) && (sbr->bs_frame_class[ch] == FIXFIX))
00249         sbr->amp_res[ch] = 0;
00250     else
00251         sbr->amp_res[ch] = sbr->bs_amp_res;
00252 
00253     if ((sbr->bs_coupling) && (ch == 1))
00254     {
00255         delta = 1;
00256         if (sbr->amp_res[ch])
00257         {
00258             t_huff = t_huffman_env_bal_3_0dB;
00259             f_huff = f_huffman_env_bal_3_0dB;
00260         } else {
00261             t_huff = t_huffman_env_bal_1_5dB;
00262             f_huff = f_huffman_env_bal_1_5dB;
00263         }
00264     } else {
00265         delta = 0;
00266         if (sbr->amp_res[ch])
00267         {
00268             t_huff = t_huffman_env_3_0dB;
00269             f_huff = f_huffman_env_3_0dB;
00270         } else {
00271             t_huff = t_huffman_env_1_5dB;
00272             f_huff = f_huffman_env_1_5dB;
00273         }
00274     }
00275 
00276     for (env = 0; env < sbr->L_E[ch]; env++)
00277     {
00278         if (sbr->bs_df_env[ch][env] == 0)
00279         {
00280             if ((sbr->bs_coupling == 1) && (ch == 1))
00281             {
00282                 if (sbr->amp_res[ch])
00283                 {
00284                     sbr->E[ch][0][env] = (uint16_t)(faad_getbits(ld, 5
00285                         DEBUGVAR(1,272,"sbr_envelope(): bs_data_env")) << delta);
00286                 } else {
00287                     sbr->E[ch][0][env] = (uint16_t)(faad_getbits(ld, 6
00288                         DEBUGVAR(1,273,"sbr_envelope(): bs_data_env")) << delta);
00289                 }
00290             } else {
00291                 if (sbr->amp_res[ch])
00292                 {
00293                     sbr->E[ch][0][env] = (uint16_t)(faad_getbits(ld, 6
00294                         DEBUGVAR(1,274,"sbr_envelope(): bs_data_env")) << delta);
00295                 } else {
00296                     sbr->E[ch][0][env] = (uint16_t)(faad_getbits(ld, 7
00297                         DEBUGVAR(1,275,"sbr_envelope(): bs_data_env")) << delta);
00298                 }
00299             }
00300 
00301             for (band = 1; band < sbr->n[sbr->f[ch][env]]; band++)
00302             {
00303                 sbr->E[ch][band][env] = (sbr_huff_dec(ld, f_huff) << delta);
00304             }
00305 
00306         } else {
00307             for (band = 0; band < sbr->n[sbr->f[ch][env]]; band++)
00308             {
00309                 sbr->E[ch][band][env] = (sbr_huff_dec(ld, t_huff) << delta);
00310             }
00311         }
00312     }
00313 
00314     extract_envelope_data(sbr, ch);
00315 }
00316 
00317 /* table 11 */
00318 void sbr_noise(bitfile *ld, sbr_info *sbr, uint8_t ch)
00319 {
00320     uint8_t noise, band;
00321     int8_t delta = 0;
00322     sbr_huff_tab t_huff, f_huff;
00323 
00324     if ((sbr->bs_coupling == 1) && (ch == 1))
00325     {
00326         delta = 1;
00327         t_huff = t_huffman_noise_bal_3_0dB;
00328         f_huff = f_huffman_env_bal_3_0dB;
00329     } else {
00330         delta = 0;
00331         t_huff = t_huffman_noise_3_0dB;
00332         f_huff = f_huffman_env_3_0dB;
00333     }
00334 
00335     for (noise = 0; noise < sbr->L_Q[ch]; noise++)
00336     {
00337         if(sbr->bs_df_noise[ch][noise] == 0)
00338         {
00339             if ((sbr->bs_coupling == 1) && (ch == 1))
00340             {
00341                 sbr->Q[ch][0][noise] = (faad_getbits(ld, 5
00342                     DEBUGVAR(1,276,"sbr_noise(): bs_data_noise")) << delta);
00343             } else {
00344                 sbr->Q[ch][0][noise] = (faad_getbits(ld, 5
00345                     DEBUGVAR(1,277,"sbr_noise(): bs_data_noise")) << delta);
00346             }
00347             for (band = 1; band < sbr->N_Q; band++)
00348             {
00349                 sbr->Q[ch][band][noise] = (sbr_huff_dec(ld, f_huff) << delta);
00350             }
00351         } else {
00352             for (band = 0; band < sbr->N_Q; band++)
00353             {
00354                 sbr->Q[ch][band][noise] = (sbr_huff_dec(ld, t_huff) << delta);
00355             }
00356         }
00357     }
00358 
00359     extract_noise_floor_data(sbr, ch);
00360 }
00361 
00362 #endif