Vignesh Venkatasubramanian | 2bd8b54 | 2014-02-20 10:50:35 -0800 | [diff] [blame] | 1 | /* Copyright (c) 2011 Xiph.Org Foundation |
| 2 | Written by Jean-Marc Valin */ |
| 3 | /* |
| 4 | Redistribution and use in source and binary forms, with or without |
| 5 | modification, are permitted provided that the following conditions |
| 6 | are met: |
| 7 | |
| 8 | - Redistributions of source code must retain the above copyright |
| 9 | notice, this list of conditions and the following disclaimer. |
| 10 | |
| 11 | - Redistributions in binary form must reproduce the above copyright |
| 12 | notice, this list of conditions and the following disclaimer in the |
| 13 | documentation and/or other materials provided with the distribution. |
| 14 | |
| 15 | THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| 16 | ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| 17 | LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| 18 | A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR |
| 19 | CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
| 20 | EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
| 21 | PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR |
| 22 | PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF |
| 23 | LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING |
| 24 | NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS |
| 25 | SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 26 | */ |
| 27 | |
| 28 | #ifdef HAVE_CONFIG_H |
| 29 | #include "config.h" |
| 30 | #endif |
| 31 | |
Felicia Lim | 0c2090c | 2017-07-05 17:36:56 -0700 | [diff] [blame^] | 32 | #define ANALYSIS_C |
| 33 | |
| 34 | #include <stdio.h> |
| 35 | |
| 36 | #include "mathops.h" |
Vignesh Venkatasubramanian | 2bd8b54 | 2014-02-20 10:50:35 -0800 | [diff] [blame] | 37 | #include "kiss_fft.h" |
| 38 | #include "celt.h" |
| 39 | #include "modes.h" |
| 40 | #include "arch.h" |
| 41 | #include "quant_bands.h" |
Vignesh Venkatasubramanian | 2bd8b54 | 2014-02-20 10:50:35 -0800 | [diff] [blame] | 42 | #include "analysis.h" |
| 43 | #include "mlp.h" |
| 44 | #include "stack_alloc.h" |
Felicia Lim | 0c2090c | 2017-07-05 17:36:56 -0700 | [diff] [blame^] | 45 | #include "float_cast.h" |
Vignesh Venkatasubramanian | 2bd8b54 | 2014-02-20 10:50:35 -0800 | [diff] [blame] | 46 | |
Vignesh Venkatasubramanian | 2bd8b54 | 2014-02-20 10:50:35 -0800 | [diff] [blame] | 47 | #ifndef M_PI |
| 48 | #define M_PI 3.141592653 |
| 49 | #endif |
| 50 | |
Felicia Lim | 0c2090c | 2017-07-05 17:36:56 -0700 | [diff] [blame^] | 51 | #ifndef DISABLE_FLOAT_API |
| 52 | |
Vignesh Venkatasubramanian | 2bd8b54 | 2014-02-20 10:50:35 -0800 | [diff] [blame] | 53 | static const float dct_table[128] = { |
| 54 | 0.250000f, 0.250000f, 0.250000f, 0.250000f, 0.250000f, 0.250000f, 0.250000f, 0.250000f, |
| 55 | 0.250000f, 0.250000f, 0.250000f, 0.250000f, 0.250000f, 0.250000f, 0.250000f, 0.250000f, |
| 56 | 0.351851f, 0.338330f, 0.311806f, 0.273300f, 0.224292f, 0.166664f, 0.102631f, 0.034654f, |
| 57 | -0.034654f,-0.102631f,-0.166664f,-0.224292f,-0.273300f,-0.311806f,-0.338330f,-0.351851f, |
| 58 | 0.346760f, 0.293969f, 0.196424f, 0.068975f,-0.068975f,-0.196424f,-0.293969f,-0.346760f, |
| 59 | -0.346760f,-0.293969f,-0.196424f,-0.068975f, 0.068975f, 0.196424f, 0.293969f, 0.346760f, |
| 60 | 0.338330f, 0.224292f, 0.034654f,-0.166664f,-0.311806f,-0.351851f,-0.273300f,-0.102631f, |
| 61 | 0.102631f, 0.273300f, 0.351851f, 0.311806f, 0.166664f,-0.034654f,-0.224292f,-0.338330f, |
| 62 | 0.326641f, 0.135299f,-0.135299f,-0.326641f,-0.326641f,-0.135299f, 0.135299f, 0.326641f, |
| 63 | 0.326641f, 0.135299f,-0.135299f,-0.326641f,-0.326641f,-0.135299f, 0.135299f, 0.326641f, |
| 64 | 0.311806f, 0.034654f,-0.273300f,-0.338330f,-0.102631f, 0.224292f, 0.351851f, 0.166664f, |
| 65 | -0.166664f,-0.351851f,-0.224292f, 0.102631f, 0.338330f, 0.273300f,-0.034654f,-0.311806f, |
| 66 | 0.293969f,-0.068975f,-0.346760f,-0.196424f, 0.196424f, 0.346760f, 0.068975f,-0.293969f, |
| 67 | -0.293969f, 0.068975f, 0.346760f, 0.196424f,-0.196424f,-0.346760f,-0.068975f, 0.293969f, |
| 68 | 0.273300f,-0.166664f,-0.338330f, 0.034654f, 0.351851f, 0.102631f,-0.311806f,-0.224292f, |
| 69 | 0.224292f, 0.311806f,-0.102631f,-0.351851f,-0.034654f, 0.338330f, 0.166664f,-0.273300f, |
| 70 | }; |
| 71 | |
| 72 | static const float analysis_window[240] = { |
| 73 | 0.000043f, 0.000171f, 0.000385f, 0.000685f, 0.001071f, 0.001541f, 0.002098f, 0.002739f, |
| 74 | 0.003466f, 0.004278f, 0.005174f, 0.006156f, 0.007222f, 0.008373f, 0.009607f, 0.010926f, |
| 75 | 0.012329f, 0.013815f, 0.015385f, 0.017037f, 0.018772f, 0.020590f, 0.022490f, 0.024472f, |
| 76 | 0.026535f, 0.028679f, 0.030904f, 0.033210f, 0.035595f, 0.038060f, 0.040604f, 0.043227f, |
| 77 | 0.045928f, 0.048707f, 0.051564f, 0.054497f, 0.057506f, 0.060591f, 0.063752f, 0.066987f, |
| 78 | 0.070297f, 0.073680f, 0.077136f, 0.080665f, 0.084265f, 0.087937f, 0.091679f, 0.095492f, |
| 79 | 0.099373f, 0.103323f, 0.107342f, 0.111427f, 0.115579f, 0.119797f, 0.124080f, 0.128428f, |
| 80 | 0.132839f, 0.137313f, 0.141849f, 0.146447f, 0.151105f, 0.155823f, 0.160600f, 0.165435f, |
| 81 | 0.170327f, 0.175276f, 0.180280f, 0.185340f, 0.190453f, 0.195619f, 0.200838f, 0.206107f, |
| 82 | 0.211427f, 0.216797f, 0.222215f, 0.227680f, 0.233193f, 0.238751f, 0.244353f, 0.250000f, |
| 83 | 0.255689f, 0.261421f, 0.267193f, 0.273005f, 0.278856f, 0.284744f, 0.290670f, 0.296632f, |
| 84 | 0.302628f, 0.308658f, 0.314721f, 0.320816f, 0.326941f, 0.333097f, 0.339280f, 0.345492f, |
| 85 | 0.351729f, 0.357992f, 0.364280f, 0.370590f, 0.376923f, 0.383277f, 0.389651f, 0.396044f, |
| 86 | 0.402455f, 0.408882f, 0.415325f, 0.421783f, 0.428254f, 0.434737f, 0.441231f, 0.447736f, |
| 87 | 0.454249f, 0.460770f, 0.467298f, 0.473832f, 0.480370f, 0.486912f, 0.493455f, 0.500000f, |
| 88 | 0.506545f, 0.513088f, 0.519630f, 0.526168f, 0.532702f, 0.539230f, 0.545751f, 0.552264f, |
| 89 | 0.558769f, 0.565263f, 0.571746f, 0.578217f, 0.584675f, 0.591118f, 0.597545f, 0.603956f, |
| 90 | 0.610349f, 0.616723f, 0.623077f, 0.629410f, 0.635720f, 0.642008f, 0.648271f, 0.654508f, |
| 91 | 0.660720f, 0.666903f, 0.673059f, 0.679184f, 0.685279f, 0.691342f, 0.697372f, 0.703368f, |
| 92 | 0.709330f, 0.715256f, 0.721144f, 0.726995f, 0.732807f, 0.738579f, 0.744311f, 0.750000f, |
| 93 | 0.755647f, 0.761249f, 0.766807f, 0.772320f, 0.777785f, 0.783203f, 0.788573f, 0.793893f, |
| 94 | 0.799162f, 0.804381f, 0.809547f, 0.814660f, 0.819720f, 0.824724f, 0.829673f, 0.834565f, |
| 95 | 0.839400f, 0.844177f, 0.848895f, 0.853553f, 0.858151f, 0.862687f, 0.867161f, 0.871572f, |
| 96 | 0.875920f, 0.880203f, 0.884421f, 0.888573f, 0.892658f, 0.896677f, 0.900627f, 0.904508f, |
| 97 | 0.908321f, 0.912063f, 0.915735f, 0.919335f, 0.922864f, 0.926320f, 0.929703f, 0.933013f, |
| 98 | 0.936248f, 0.939409f, 0.942494f, 0.945503f, 0.948436f, 0.951293f, 0.954072f, 0.956773f, |
| 99 | 0.959396f, 0.961940f, 0.964405f, 0.966790f, 0.969096f, 0.971321f, 0.973465f, 0.975528f, |
| 100 | 0.977510f, 0.979410f, 0.981228f, 0.982963f, 0.984615f, 0.986185f, 0.987671f, 0.989074f, |
| 101 | 0.990393f, 0.991627f, 0.992778f, 0.993844f, 0.994826f, 0.995722f, 0.996534f, 0.997261f, |
| 102 | 0.997902f, 0.998459f, 0.998929f, 0.999315f, 0.999615f, 0.999829f, 0.999957f, 1.000000f, |
| 103 | }; |
| 104 | |
| 105 | static const int tbands[NB_TBANDS+1] = { |
Felicia Lim | 0c2090c | 2017-07-05 17:36:56 -0700 | [diff] [blame^] | 106 | 4, 8, 12, 16, 20, 24, 28, 32, 40, 48, 56, 64, 80, 96, 112, 136, 160, 192, 240 |
Vignesh Venkatasubramanian | 2bd8b54 | 2014-02-20 10:50:35 -0800 | [diff] [blame] | 107 | }; |
| 108 | |
Vignesh Venkatasubramanian | 2bd8b54 | 2014-02-20 10:50:35 -0800 | [diff] [blame] | 109 | #define NB_TONAL_SKIP_BANDS 9 |
| 110 | |
Felicia Lim | 0c2090c | 2017-07-05 17:36:56 -0700 | [diff] [blame^] | 111 | static opus_val32 silk_resampler_down2_hp( |
| 112 | opus_val32 *S, /* I/O State vector [ 2 ] */ |
| 113 | opus_val32 *out, /* O Output signal [ floor(len/2) ] */ |
| 114 | const opus_val32 *in, /* I Input signal [ len ] */ |
| 115 | int inLen /* I Number of input samples */ |
| 116 | ) |
| 117 | { |
| 118 | int k, len2 = inLen/2; |
| 119 | opus_val32 in32, out32, out32_hp, Y, X; |
| 120 | opus_val64 hp_ener = 0; |
| 121 | /* Internal variables and state are in Q10 format */ |
| 122 | for( k = 0; k < len2; k++ ) { |
| 123 | /* Convert to Q10 */ |
| 124 | in32 = in[ 2 * k ]; |
| 125 | |
| 126 | /* All-pass section for even input sample */ |
| 127 | Y = SUB32( in32, S[ 0 ] ); |
| 128 | X = MULT16_32_Q15(QCONST16(0.6074371f, 15), Y); |
| 129 | out32 = ADD32( S[ 0 ], X ); |
| 130 | S[ 0 ] = ADD32( in32, X ); |
| 131 | out32_hp = out32; |
| 132 | /* Convert to Q10 */ |
| 133 | in32 = in[ 2 * k + 1 ]; |
| 134 | |
| 135 | /* All-pass section for odd input sample, and add to output of previous section */ |
| 136 | Y = SUB32( in32, S[ 1 ] ); |
| 137 | X = MULT16_32_Q15(QCONST16(0.15063f, 15), Y); |
| 138 | out32 = ADD32( out32, S[ 1 ] ); |
| 139 | out32 = ADD32( out32, X ); |
| 140 | S[ 1 ] = ADD32( in32, X ); |
| 141 | |
| 142 | Y = SUB32( -in32, S[ 2 ] ); |
| 143 | X = MULT16_32_Q15(QCONST16(0.15063f, 15), Y); |
| 144 | out32_hp = ADD32( out32_hp, S[ 2 ] ); |
| 145 | out32_hp = ADD32( out32_hp, X ); |
| 146 | S[ 2 ] = ADD32( -in32, X ); |
| 147 | |
| 148 | hp_ener += out32_hp*(opus_val64)out32_hp; |
| 149 | /* Add, convert back to int16 and store to output */ |
| 150 | out[ k ] = HALF32(out32); |
| 151 | } |
| 152 | #ifdef FIXED_POINT |
| 153 | /* len2 can be up to 480, so we shift by 8 more to make it fit. */ |
| 154 | hp_ener = hp_ener >> (2*SIG_SHIFT + 8); |
| 155 | #endif |
| 156 | return (opus_val32)hp_ener; |
Vignesh Venkatasubramanian | 2bd8b54 | 2014-02-20 10:50:35 -0800 | [diff] [blame] | 157 | } |
| 158 | |
Felicia Lim | 0c2090c | 2017-07-05 17:36:56 -0700 | [diff] [blame^] | 159 | static opus_val32 downmix_and_resample(downmix_func downmix, const void *_x, opus_val32 *y, opus_val32 S[3], int subframe, int offset, int c1, int c2, int C, int Fs) |
| 160 | { |
| 161 | VARDECL(opus_val32, tmp); |
| 162 | opus_val32 scale; |
| 163 | int j; |
| 164 | opus_val32 ret = 0; |
| 165 | SAVE_STACK; |
| 166 | |
| 167 | if (subframe==0) return 0; |
| 168 | if (Fs == 48000) |
| 169 | { |
| 170 | subframe *= 2; |
| 171 | offset *= 2; |
| 172 | } else if (Fs == 16000) { |
| 173 | subframe = subframe*2/3; |
| 174 | offset = offset*2/3; |
| 175 | } |
| 176 | ALLOC(tmp, subframe, opus_val32); |
| 177 | |
| 178 | downmix(_x, tmp, subframe, offset, c1, c2, C); |
| 179 | #ifdef FIXED_POINT |
| 180 | scale = (1<<SIG_SHIFT); |
| 181 | #else |
| 182 | scale = 1.f/32768; |
| 183 | #endif |
| 184 | if (c2==-2) |
| 185 | scale /= C; |
| 186 | else if (c2>-1) |
| 187 | scale /= 2; |
| 188 | for (j=0;j<subframe;j++) |
| 189 | tmp[j] *= scale; |
| 190 | if (Fs == 48000) |
| 191 | { |
| 192 | ret = silk_resampler_down2_hp(S, y, tmp, subframe); |
| 193 | } else if (Fs == 24000) { |
| 194 | OPUS_COPY(y, tmp, subframe); |
| 195 | } else if (Fs == 16000) { |
| 196 | VARDECL(opus_val32, tmp3x); |
| 197 | ALLOC(tmp3x, 3*subframe, opus_val32); |
| 198 | /* Don't do this at home! This resampler is horrible and it's only (barely) |
| 199 | usable for the purpose of the analysis because we don't care about all |
| 200 | the aliasing between 8 kHz and 12 kHz. */ |
| 201 | for (j=0;j<subframe;j++) |
| 202 | { |
| 203 | tmp3x[3*j] = tmp[j]; |
| 204 | tmp3x[3*j+1] = tmp[j]; |
| 205 | tmp3x[3*j+2] = tmp[j]; |
| 206 | } |
| 207 | silk_resampler_down2_hp(S, y, tmp3x, 3*subframe); |
| 208 | } |
| 209 | RESTORE_STACK; |
| 210 | return ret; |
| 211 | } |
| 212 | |
| 213 | void tonality_analysis_init(TonalityAnalysisState *tonal, opus_int32 Fs) |
flim | c91ee5b | 2016-01-26 14:33:44 +0100 | [diff] [blame] | 214 | { |
| 215 | /* Initialize reusable fields. */ |
| 216 | tonal->arch = opus_select_arch(); |
Felicia Lim | 0c2090c | 2017-07-05 17:36:56 -0700 | [diff] [blame^] | 217 | tonal->Fs = Fs; |
flim | c91ee5b | 2016-01-26 14:33:44 +0100 | [diff] [blame] | 218 | /* Clear remaining fields. */ |
| 219 | tonality_analysis_reset(tonal); |
| 220 | } |
| 221 | |
| 222 | void tonality_analysis_reset(TonalityAnalysisState *tonal) |
| 223 | { |
| 224 | /* Clear non-reusable fields. */ |
| 225 | char *start = (char*)&tonal->TONALITY_ANALYSIS_RESET_START; |
| 226 | OPUS_CLEAR(start, sizeof(TonalityAnalysisState) - (start - (char*)tonal)); |
Felicia Lim | 0c2090c | 2017-07-05 17:36:56 -0700 | [diff] [blame^] | 227 | tonal->music_confidence = .9f; |
| 228 | tonal->speech_confidence = .1f; |
flim | c91ee5b | 2016-01-26 14:33:44 +0100 | [diff] [blame] | 229 | } |
| 230 | |
Vignesh Venkatasubramanian | 2bd8b54 | 2014-02-20 10:50:35 -0800 | [diff] [blame] | 231 | void tonality_get_info(TonalityAnalysisState *tonal, AnalysisInfo *info_out, int len) |
| 232 | { |
| 233 | int pos; |
| 234 | int curr_lookahead; |
| 235 | float psum; |
Felicia Lim | 0c2090c | 2017-07-05 17:36:56 -0700 | [diff] [blame^] | 236 | float tonality_max; |
| 237 | float tonality_avg; |
| 238 | int tonality_count; |
Vignesh Venkatasubramanian | 2bd8b54 | 2014-02-20 10:50:35 -0800 | [diff] [blame] | 239 | int i; |
| 240 | |
| 241 | pos = tonal->read_pos; |
| 242 | curr_lookahead = tonal->write_pos-tonal->read_pos; |
| 243 | if (curr_lookahead<0) |
| 244 | curr_lookahead += DETECT_SIZE; |
| 245 | |
Felicia Lim | 0c2090c | 2017-07-05 17:36:56 -0700 | [diff] [blame^] | 246 | /* On long frames, look at the second analysis window rather than the first. */ |
| 247 | if (len > tonal->Fs/50 && pos != tonal->write_pos) |
Vignesh Venkatasubramanian | 2bd8b54 | 2014-02-20 10:50:35 -0800 | [diff] [blame] | 248 | { |
| 249 | pos++; |
| 250 | if (pos==DETECT_SIZE) |
| 251 | pos=0; |
| 252 | } |
| 253 | if (pos == tonal->write_pos) |
| 254 | pos--; |
| 255 | if (pos<0) |
| 256 | pos = DETECT_SIZE-1; |
| 257 | OPUS_COPY(info_out, &tonal->info[pos], 1); |
Felicia Lim | 0c2090c | 2017-07-05 17:36:56 -0700 | [diff] [blame^] | 258 | tonality_max = tonality_avg = info_out->tonality; |
| 259 | tonality_count = 1; |
| 260 | /* If possible, look ahead for a tone to compensate for the delay in the tone detector. */ |
| 261 | for (i=0;i<3;i++) |
Vignesh Venkatasubramanian | 2bd8b54 | 2014-02-20 10:50:35 -0800 | [diff] [blame] | 262 | { |
Felicia Lim | 0c2090c | 2017-07-05 17:36:56 -0700 | [diff] [blame^] | 263 | pos++; |
| 264 | if (pos==DETECT_SIZE) |
| 265 | pos = 0; |
| 266 | if (pos == tonal->write_pos) |
| 267 | break; |
| 268 | tonality_max = MAX32(tonality_max, tonal->info[pos].tonality); |
| 269 | tonality_avg += tonal->info[pos].tonality; |
| 270 | tonality_count++; |
| 271 | } |
| 272 | info_out->tonality = MAX32(tonality_avg/tonality_count, tonality_max-.2f); |
| 273 | tonal->read_subframe += len/(tonal->Fs/400); |
| 274 | while (tonal->read_subframe>=8) |
| 275 | { |
| 276 | tonal->read_subframe -= 8; |
Vignesh Venkatasubramanian | 2bd8b54 | 2014-02-20 10:50:35 -0800 | [diff] [blame] | 277 | tonal->read_pos++; |
| 278 | } |
| 279 | if (tonal->read_pos>=DETECT_SIZE) |
| 280 | tonal->read_pos-=DETECT_SIZE; |
| 281 | |
Felicia Lim | 0c2090c | 2017-07-05 17:36:56 -0700 | [diff] [blame^] | 282 | /* The -1 is to compensate for the delay in the features themselves. */ |
| 283 | curr_lookahead = IMAX(curr_lookahead-1, 0); |
Vignesh Venkatasubramanian | 2bd8b54 | 2014-02-20 10:50:35 -0800 | [diff] [blame] | 284 | |
| 285 | psum=0; |
| 286 | /* Summing the probability of transition patterns that involve music at |
| 287 | time (DETECT_SIZE-curr_lookahead-1) */ |
| 288 | for (i=0;i<DETECT_SIZE-curr_lookahead;i++) |
| 289 | psum += tonal->pmusic[i]; |
| 290 | for (;i<DETECT_SIZE;i++) |
| 291 | psum += tonal->pspeech[i]; |
| 292 | psum = psum*tonal->music_confidence + (1-psum)*tonal->speech_confidence; |
Felicia Lim | 0c2090c | 2017-07-05 17:36:56 -0700 | [diff] [blame^] | 293 | /*printf("%f %f %f %f %f\n", psum, info_out->music_prob, info_out->vad_prob, info_out->activity_probability, info_out->tonality);*/ |
Vignesh Venkatasubramanian | 2bd8b54 | 2014-02-20 10:50:35 -0800 | [diff] [blame] | 294 | |
| 295 | info_out->music_prob = psum; |
| 296 | } |
| 297 | |
Felicia Lim | 0c2090c | 2017-07-05 17:36:56 -0700 | [diff] [blame^] | 298 | static const float std_feature_bias[9] = { |
| 299 | 5.684947f, 3.475288f, 1.770634f, 1.599784f, 3.773215f, |
| 300 | 2.163313f, 1.260756f, 1.116868f, 1.918795f |
| 301 | }; |
| 302 | |
| 303 | #define LEAKAGE_OFFSET 2.5f |
| 304 | #define LEAKAGE_SLOPE 2.f |
| 305 | |
| 306 | #ifdef FIXED_POINT |
| 307 | /* For fixed-point, the input is +/-2^15 shifted up by SIG_SHIFT, so we need to |
| 308 | compensate for that in the energy. */ |
| 309 | #define SCALE_COMPENS (1.f/((opus_int32)1<<(15+SIG_SHIFT))) |
| 310 | #define SCALE_ENER(e) ((SCALE_COMPENS*SCALE_COMPENS)*(e)) |
| 311 | #else |
| 312 | #define SCALE_ENER(e) (e) |
| 313 | #endif |
| 314 | |
flim | c91ee5b | 2016-01-26 14:33:44 +0100 | [diff] [blame] | 315 | static void tonality_analysis(TonalityAnalysisState *tonal, const CELTMode *celt_mode, const void *x, int len, int offset, int c1, int c2, int C, int lsb_depth, downmix_func downmix) |
Vignesh Venkatasubramanian | 2bd8b54 | 2014-02-20 10:50:35 -0800 | [diff] [blame] | 316 | { |
| 317 | int i, b; |
| 318 | const kiss_fft_state *kfft; |
| 319 | VARDECL(kiss_fft_cpx, in); |
| 320 | VARDECL(kiss_fft_cpx, out); |
| 321 | int N = 480, N2=240; |
| 322 | float * OPUS_RESTRICT A = tonal->angle; |
| 323 | float * OPUS_RESTRICT dA = tonal->d_angle; |
| 324 | float * OPUS_RESTRICT d2A = tonal->d2_angle; |
| 325 | VARDECL(float, tonality); |
| 326 | VARDECL(float, noisiness); |
| 327 | float band_tonality[NB_TBANDS]; |
| 328 | float logE[NB_TBANDS]; |
| 329 | float BFCC[8]; |
| 330 | float features[25]; |
| 331 | float frame_tonality; |
| 332 | float max_frame_tonality; |
| 333 | /*float tw_sum=0;*/ |
| 334 | float frame_noisiness; |
| 335 | const float pi4 = (float)(M_PI*M_PI*M_PI*M_PI); |
| 336 | float slope=0; |
| 337 | float frame_stationarity; |
| 338 | float relativeE; |
| 339 | float frame_probs[2]; |
| 340 | float alpha, alphaE, alphaE2; |
| 341 | float frame_loudness; |
| 342 | float bandwidth_mask; |
| 343 | int bandwidth=0; |
| 344 | float maxE = 0; |
| 345 | float noise_floor; |
| 346 | int remaining; |
| 347 | AnalysisInfo *info; |
Felicia Lim | 0c2090c | 2017-07-05 17:36:56 -0700 | [diff] [blame^] | 348 | float hp_ener; |
| 349 | float tonality2[240]; |
| 350 | float midE[8]; |
| 351 | float spec_variability=0; |
| 352 | float band_log2[NB_TBANDS+1]; |
| 353 | float leakage_from[NB_TBANDS+1]; |
| 354 | float leakage_to[NB_TBANDS+1]; |
Vignesh Venkatasubramanian | 2bd8b54 | 2014-02-20 10:50:35 -0800 | [diff] [blame] | 355 | SAVE_STACK; |
| 356 | |
Felicia Lim | 0c2090c | 2017-07-05 17:36:56 -0700 | [diff] [blame^] | 357 | alpha = 1.f/IMIN(10, 1+tonal->count); |
| 358 | alphaE = 1.f/IMIN(25, 1+tonal->count); |
| 359 | alphaE2 = 1.f/IMIN(500, 1+tonal->count); |
Vignesh Venkatasubramanian | 2bd8b54 | 2014-02-20 10:50:35 -0800 | [diff] [blame] | 360 | |
Felicia Lim | 0c2090c | 2017-07-05 17:36:56 -0700 | [diff] [blame^] | 361 | if (tonal->Fs == 48000) |
| 362 | { |
| 363 | /* len and offset are now at 24 kHz. */ |
| 364 | len/= 2; |
| 365 | offset /= 2; |
| 366 | } else if (tonal->Fs == 16000) { |
| 367 | len = 3*len/2; |
| 368 | offset = 3*offset/2; |
| 369 | } |
| 370 | |
| 371 | if (tonal->count<4) { |
| 372 | if (tonal->application == OPUS_APPLICATION_VOIP) |
| 373 | tonal->music_prob = .1f; |
| 374 | else |
| 375 | tonal->music_prob = .625f; |
| 376 | } |
Vignesh Venkatasubramanian | 2bd8b54 | 2014-02-20 10:50:35 -0800 | [diff] [blame] | 377 | kfft = celt_mode->mdct.kfft[0]; |
| 378 | if (tonal->count==0) |
| 379 | tonal->mem_fill = 240; |
Felicia Lim | 0c2090c | 2017-07-05 17:36:56 -0700 | [diff] [blame^] | 380 | tonal->hp_ener_accum += (float)downmix_and_resample(downmix, x, |
| 381 | &tonal->inmem[tonal->mem_fill], tonal->downmix_state, |
| 382 | IMIN(len, ANALYSIS_BUF_SIZE-tonal->mem_fill), offset, c1, c2, C, tonal->Fs); |
Vignesh Venkatasubramanian | 2bd8b54 | 2014-02-20 10:50:35 -0800 | [diff] [blame] | 383 | if (tonal->mem_fill+len < ANALYSIS_BUF_SIZE) |
| 384 | { |
| 385 | tonal->mem_fill += len; |
| 386 | /* Don't have enough to update the analysis */ |
| 387 | RESTORE_STACK; |
| 388 | return; |
| 389 | } |
Felicia Lim | 0c2090c | 2017-07-05 17:36:56 -0700 | [diff] [blame^] | 390 | hp_ener = tonal->hp_ener_accum; |
Vignesh Venkatasubramanian | 2bd8b54 | 2014-02-20 10:50:35 -0800 | [diff] [blame] | 391 | info = &tonal->info[tonal->write_pos++]; |
| 392 | if (tonal->write_pos>=DETECT_SIZE) |
| 393 | tonal->write_pos-=DETECT_SIZE; |
| 394 | |
| 395 | ALLOC(in, 480, kiss_fft_cpx); |
| 396 | ALLOC(out, 480, kiss_fft_cpx); |
| 397 | ALLOC(tonality, 240, float); |
| 398 | ALLOC(noisiness, 240, float); |
| 399 | for (i=0;i<N2;i++) |
| 400 | { |
| 401 | float w = analysis_window[i]; |
| 402 | in[i].r = (kiss_fft_scalar)(w*tonal->inmem[i]); |
| 403 | in[i].i = (kiss_fft_scalar)(w*tonal->inmem[N2+i]); |
| 404 | in[N-i-1].r = (kiss_fft_scalar)(w*tonal->inmem[N-i-1]); |
| 405 | in[N-i-1].i = (kiss_fft_scalar)(w*tonal->inmem[N+N2-i-1]); |
| 406 | } |
| 407 | OPUS_MOVE(tonal->inmem, tonal->inmem+ANALYSIS_BUF_SIZE-240, 240); |
| 408 | remaining = len - (ANALYSIS_BUF_SIZE-tonal->mem_fill); |
Felicia Lim | 0c2090c | 2017-07-05 17:36:56 -0700 | [diff] [blame^] | 409 | tonal->hp_ener_accum = (float)downmix_and_resample(downmix, x, |
| 410 | &tonal->inmem[240], tonal->downmix_state, remaining, |
| 411 | offset+ANALYSIS_BUF_SIZE-tonal->mem_fill, c1, c2, C, tonal->Fs); |
Vignesh Venkatasubramanian | 2bd8b54 | 2014-02-20 10:50:35 -0800 | [diff] [blame] | 412 | tonal->mem_fill = 240 + remaining; |
flim | c91ee5b | 2016-01-26 14:33:44 +0100 | [diff] [blame] | 413 | opus_fft(kfft, in, out, tonal->arch); |
| 414 | #ifndef FIXED_POINT |
| 415 | /* If there's any NaN on the input, the entire output will be NaN, so we only need to check one value. */ |
| 416 | if (celt_isnan(out[0].r)) |
| 417 | { |
| 418 | info->valid = 0; |
| 419 | RESTORE_STACK; |
| 420 | return; |
| 421 | } |
| 422 | #endif |
Vignesh Venkatasubramanian | 2bd8b54 | 2014-02-20 10:50:35 -0800 | [diff] [blame] | 423 | |
| 424 | for (i=1;i<N2;i++) |
| 425 | { |
| 426 | float X1r, X2r, X1i, X2i; |
| 427 | float angle, d_angle, d2_angle; |
| 428 | float angle2, d_angle2, d2_angle2; |
| 429 | float mod1, mod2, avg_mod; |
| 430 | X1r = (float)out[i].r+out[N-i].r; |
| 431 | X1i = (float)out[i].i-out[N-i].i; |
| 432 | X2r = (float)out[i].i+out[N-i].i; |
| 433 | X2i = (float)out[N-i].r-out[i].r; |
| 434 | |
| 435 | angle = (float)(.5f/M_PI)*fast_atan2f(X1i, X1r); |
| 436 | d_angle = angle - A[i]; |
| 437 | d2_angle = d_angle - dA[i]; |
| 438 | |
| 439 | angle2 = (float)(.5f/M_PI)*fast_atan2f(X2i, X2r); |
| 440 | d_angle2 = angle2 - angle; |
| 441 | d2_angle2 = d_angle2 - d_angle; |
| 442 | |
Felicia Lim | 0c2090c | 2017-07-05 17:36:56 -0700 | [diff] [blame^] | 443 | mod1 = d2_angle - (float)float2int(d2_angle); |
Vignesh Venkatasubramanian | 2bd8b54 | 2014-02-20 10:50:35 -0800 | [diff] [blame] | 444 | noisiness[i] = ABS16(mod1); |
| 445 | mod1 *= mod1; |
| 446 | mod1 *= mod1; |
| 447 | |
Felicia Lim | 0c2090c | 2017-07-05 17:36:56 -0700 | [diff] [blame^] | 448 | mod2 = d2_angle2 - (float)float2int(d2_angle2); |
Vignesh Venkatasubramanian | 2bd8b54 | 2014-02-20 10:50:35 -0800 | [diff] [blame] | 449 | noisiness[i] += ABS16(mod2); |
| 450 | mod2 *= mod2; |
| 451 | mod2 *= mod2; |
| 452 | |
Felicia Lim | 0c2090c | 2017-07-05 17:36:56 -0700 | [diff] [blame^] | 453 | avg_mod = .25f*(d2A[i]+mod1+2*mod2); |
| 454 | /* This introduces an extra delay of 2 frames in the detection. */ |
Vignesh Venkatasubramanian | 2bd8b54 | 2014-02-20 10:50:35 -0800 | [diff] [blame] | 455 | tonality[i] = 1.f/(1.f+40.f*16.f*pi4*avg_mod)-.015f; |
Felicia Lim | 0c2090c | 2017-07-05 17:36:56 -0700 | [diff] [blame^] | 456 | /* No delay on this detection, but it's less reliable. */ |
| 457 | tonality2[i] = 1.f/(1.f+40.f*16.f*pi4*mod2)-.015f; |
Vignesh Venkatasubramanian | 2bd8b54 | 2014-02-20 10:50:35 -0800 | [diff] [blame] | 458 | |
| 459 | A[i] = angle2; |
| 460 | dA[i] = d_angle2; |
| 461 | d2A[i] = mod2; |
| 462 | } |
Felicia Lim | 0c2090c | 2017-07-05 17:36:56 -0700 | [diff] [blame^] | 463 | for (i=2;i<N2-1;i++) |
| 464 | { |
| 465 | float tt = MIN32(tonality2[i], MAX32(tonality2[i-1], tonality2[i+1])); |
| 466 | tonality[i] = .9f*MAX32(tonality[i], tt-.1f); |
| 467 | } |
Vignesh Venkatasubramanian | 2bd8b54 | 2014-02-20 10:50:35 -0800 | [diff] [blame] | 468 | frame_tonality = 0; |
| 469 | max_frame_tonality = 0; |
| 470 | /*tw_sum = 0;*/ |
| 471 | info->activity = 0; |
| 472 | frame_noisiness = 0; |
| 473 | frame_stationarity = 0; |
| 474 | if (!tonal->count) |
| 475 | { |
| 476 | for (b=0;b<NB_TBANDS;b++) |
| 477 | { |
| 478 | tonal->lowE[b] = 1e10; |
| 479 | tonal->highE[b] = -1e10; |
| 480 | } |
| 481 | } |
| 482 | relativeE = 0; |
| 483 | frame_loudness = 0; |
Felicia Lim | 0c2090c | 2017-07-05 17:36:56 -0700 | [diff] [blame^] | 484 | /* The energy of the very first band is special because of DC. */ |
| 485 | { |
| 486 | float E = 0; |
| 487 | float X1r, X2r; |
| 488 | X1r = 2*(float)out[0].r; |
| 489 | X2r = 2*(float)out[0].i; |
| 490 | E = X1r*X1r + X2r*X2r; |
| 491 | for (i=1;i<4;i++) |
| 492 | { |
| 493 | float binE = out[i].r*(float)out[i].r + out[N-i].r*(float)out[N-i].r |
| 494 | + out[i].i*(float)out[i].i + out[N-i].i*(float)out[N-i].i; |
| 495 | E += binE; |
| 496 | } |
| 497 | E = SCALE_ENER(E); |
| 498 | band_log2[0] = .5f*1.442695f*(float)log(E+1e-10f); |
| 499 | } |
Vignesh Venkatasubramanian | 2bd8b54 | 2014-02-20 10:50:35 -0800 | [diff] [blame] | 500 | for (b=0;b<NB_TBANDS;b++) |
| 501 | { |
| 502 | float E=0, tE=0, nE=0; |
| 503 | float L1, L2; |
| 504 | float stationarity; |
| 505 | for (i=tbands[b];i<tbands[b+1];i++) |
| 506 | { |
| 507 | float binE = out[i].r*(float)out[i].r + out[N-i].r*(float)out[N-i].r |
| 508 | + out[i].i*(float)out[i].i + out[N-i].i*(float)out[N-i].i; |
Felicia Lim | 0c2090c | 2017-07-05 17:36:56 -0700 | [diff] [blame^] | 509 | binE = SCALE_ENER(binE); |
Vignesh Venkatasubramanian | 2bd8b54 | 2014-02-20 10:50:35 -0800 | [diff] [blame] | 510 | E += binE; |
Felicia Lim | 0c2090c | 2017-07-05 17:36:56 -0700 | [diff] [blame^] | 511 | tE += binE*MAX32(0, tonality[i]); |
Vignesh Venkatasubramanian | 2bd8b54 | 2014-02-20 10:50:35 -0800 | [diff] [blame] | 512 | nE += binE*2.f*(.5f-noisiness[i]); |
| 513 | } |
flim | c91ee5b | 2016-01-26 14:33:44 +0100 | [diff] [blame] | 514 | #ifndef FIXED_POINT |
| 515 | /* Check for extreme band energies that could cause NaNs later. */ |
| 516 | if (!(E<1e9f) || celt_isnan(E)) |
| 517 | { |
| 518 | info->valid = 0; |
| 519 | RESTORE_STACK; |
| 520 | return; |
| 521 | } |
| 522 | #endif |
| 523 | |
Vignesh Venkatasubramanian | 2bd8b54 | 2014-02-20 10:50:35 -0800 | [diff] [blame] | 524 | tonal->E[tonal->E_count][b] = E; |
| 525 | frame_noisiness += nE/(1e-15f+E); |
| 526 | |
| 527 | frame_loudness += (float)sqrt(E+1e-10f); |
| 528 | logE[b] = (float)log(E+1e-10f); |
Felicia Lim | 0c2090c | 2017-07-05 17:36:56 -0700 | [diff] [blame^] | 529 | band_log2[b+1] = .5f*1.442695f*(float)log(E+1e-10f); |
| 530 | tonal->logE[tonal->E_count][b] = logE[b]; |
| 531 | if (tonal->count==0) |
| 532 | tonal->highE[b] = tonal->lowE[b] = logE[b]; |
| 533 | if (tonal->highE[b] > tonal->lowE[b] + 7.5) |
Vignesh Venkatasubramanian | 2bd8b54 | 2014-02-20 10:50:35 -0800 | [diff] [blame] | 534 | { |
Felicia Lim | 0c2090c | 2017-07-05 17:36:56 -0700 | [diff] [blame^] | 535 | if (tonal->highE[b] - logE[b] > logE[b] - tonal->lowE[b]) |
| 536 | tonal->highE[b] -= .01f; |
| 537 | else |
| 538 | tonal->lowE[b] += .01f; |
Vignesh Venkatasubramanian | 2bd8b54 | 2014-02-20 10:50:35 -0800 | [diff] [blame] | 539 | } |
Felicia Lim | 0c2090c | 2017-07-05 17:36:56 -0700 | [diff] [blame^] | 540 | if (logE[b] > tonal->highE[b]) |
| 541 | { |
| 542 | tonal->highE[b] = logE[b]; |
| 543 | tonal->lowE[b] = MAX32(tonal->highE[b]-15, tonal->lowE[b]); |
| 544 | } else if (logE[b] < tonal->lowE[b]) |
| 545 | { |
| 546 | tonal->lowE[b] = logE[b]; |
| 547 | tonal->highE[b] = MIN32(tonal->lowE[b]+15, tonal->highE[b]); |
| 548 | } |
| 549 | relativeE += (logE[b]-tonal->lowE[b])/(1e-15f + (tonal->highE[b]-tonal->lowE[b])); |
Vignesh Venkatasubramanian | 2bd8b54 | 2014-02-20 10:50:35 -0800 | [diff] [blame] | 550 | |
| 551 | L1=L2=0; |
| 552 | for (i=0;i<NB_FRAMES;i++) |
| 553 | { |
| 554 | L1 += (float)sqrt(tonal->E[i][b]); |
| 555 | L2 += tonal->E[i][b]; |
| 556 | } |
| 557 | |
| 558 | stationarity = MIN16(0.99f,L1/(float)sqrt(1e-15+NB_FRAMES*L2)); |
| 559 | stationarity *= stationarity; |
| 560 | stationarity *= stationarity; |
| 561 | frame_stationarity += stationarity; |
| 562 | /*band_tonality[b] = tE/(1e-15+E)*/; |
| 563 | band_tonality[b] = MAX16(tE/(1e-15f+E), stationarity*tonal->prev_band_tonality[b]); |
| 564 | #if 0 |
| 565 | if (b>=NB_TONAL_SKIP_BANDS) |
| 566 | { |
| 567 | frame_tonality += tweight[b]*band_tonality[b]; |
| 568 | tw_sum += tweight[b]; |
| 569 | } |
| 570 | #else |
| 571 | frame_tonality += band_tonality[b]; |
| 572 | if (b>=NB_TBANDS-NB_TONAL_SKIP_BANDS) |
| 573 | frame_tonality -= band_tonality[b-NB_TBANDS+NB_TONAL_SKIP_BANDS]; |
| 574 | #endif |
| 575 | max_frame_tonality = MAX16(max_frame_tonality, (1.f+.03f*(b-NB_TBANDS))*frame_tonality); |
| 576 | slope += band_tonality[b]*(b-8); |
| 577 | /*printf("%f %f ", band_tonality[b], stationarity);*/ |
| 578 | tonal->prev_band_tonality[b] = band_tonality[b]; |
| 579 | } |
| 580 | |
Felicia Lim | 0c2090c | 2017-07-05 17:36:56 -0700 | [diff] [blame^] | 581 | leakage_from[0] = band_log2[0]; |
| 582 | leakage_to[0] = band_log2[0] - LEAKAGE_OFFSET; |
| 583 | for (b=1;b<NB_TBANDS+1;b++) |
| 584 | { |
| 585 | float leak_slope = LEAKAGE_SLOPE*(tbands[b]-tbands[b-1])/4; |
| 586 | leakage_from[b] = MIN16(leakage_from[b-1]+leak_slope, band_log2[b]); |
| 587 | leakage_to[b] = MAX16(leakage_to[b-1]-leak_slope, band_log2[b]-LEAKAGE_OFFSET); |
| 588 | } |
| 589 | for (b=NB_TBANDS-2;b>=0;b--) |
| 590 | { |
| 591 | float leak_slope = LEAKAGE_SLOPE*(tbands[b+1]-tbands[b])/4; |
| 592 | leakage_from[b] = MIN16(leakage_from[b+1]+leak_slope, leakage_from[b]); |
| 593 | leakage_to[b] = MAX16(leakage_to[b+1]-leak_slope, leakage_to[b]); |
| 594 | } |
| 595 | celt_assert(NB_TBANDS+1 <= LEAK_BANDS); |
| 596 | for (b=0;b<NB_TBANDS+1;b++) |
| 597 | { |
| 598 | /* leak_boost[] is made up of two terms. The first, based on leakage_to[], |
| 599 | represents the boost needed to overcome the amount of analysis leakage |
| 600 | cause in a weaker band b by louder neighbouring bands. |
| 601 | The second, based on leakage_from[], applies to a loud band b for |
| 602 | which the quantization noise causes synthesis leakage to the weaker |
| 603 | neighbouring bands. */ |
| 604 | float boost = MAX16(0, leakage_to[b] - band_log2[b]) + |
| 605 | MAX16(0, band_log2[b] - (leakage_from[b]+LEAKAGE_OFFSET)); |
| 606 | info->leak_boost[b] = IMIN(255, (int)floor(.5 + 64.f*boost)); |
| 607 | } |
| 608 | for (;b<LEAK_BANDS;b++) info->leak_boost[b] = 0; |
| 609 | |
| 610 | for (i=0;i<NB_FRAMES;i++) |
| 611 | { |
| 612 | int j; |
| 613 | float mindist = 1e15f; |
| 614 | for (j=0;j<NB_FRAMES;j++) |
| 615 | { |
| 616 | int k; |
| 617 | float dist=0; |
| 618 | for (k=0;k<NB_TBANDS;k++) |
| 619 | { |
| 620 | float tmp; |
| 621 | tmp = tonal->logE[i][k] - tonal->logE[j][k]; |
| 622 | dist += tmp*tmp; |
| 623 | } |
| 624 | if (j!=i) |
| 625 | mindist = MIN32(mindist, dist); |
| 626 | } |
| 627 | spec_variability += mindist; |
| 628 | } |
| 629 | spec_variability = (float)sqrt(spec_variability/NB_FRAMES/NB_TBANDS); |
Vignesh Venkatasubramanian | 2bd8b54 | 2014-02-20 10:50:35 -0800 | [diff] [blame] | 630 | bandwidth_mask = 0; |
| 631 | bandwidth = 0; |
| 632 | maxE = 0; |
| 633 | noise_floor = 5.7e-4f/(1<<(IMAX(0,lsb_depth-8))); |
Vignesh Venkatasubramanian | 2bd8b54 | 2014-02-20 10:50:35 -0800 | [diff] [blame] | 634 | noise_floor *= noise_floor; |
Felicia Lim | 0c2090c | 2017-07-05 17:36:56 -0700 | [diff] [blame^] | 635 | for (b=0;b<NB_TBANDS;b++) |
Vignesh Venkatasubramanian | 2bd8b54 | 2014-02-20 10:50:35 -0800 | [diff] [blame] | 636 | { |
| 637 | float E=0; |
| 638 | int band_start, band_end; |
| 639 | /* Keep a margin of 300 Hz for aliasing */ |
Felicia Lim | 0c2090c | 2017-07-05 17:36:56 -0700 | [diff] [blame^] | 640 | band_start = tbands[b]; |
| 641 | band_end = tbands[b+1]; |
Vignesh Venkatasubramanian | 2bd8b54 | 2014-02-20 10:50:35 -0800 | [diff] [blame] | 642 | for (i=band_start;i<band_end;i++) |
| 643 | { |
| 644 | float binE = out[i].r*(float)out[i].r + out[N-i].r*(float)out[N-i].r |
| 645 | + out[i].i*(float)out[i].i + out[N-i].i*(float)out[N-i].i; |
| 646 | E += binE; |
| 647 | } |
Felicia Lim | 0c2090c | 2017-07-05 17:36:56 -0700 | [diff] [blame^] | 648 | E = SCALE_ENER(E); |
Vignesh Venkatasubramanian | 2bd8b54 | 2014-02-20 10:50:35 -0800 | [diff] [blame] | 649 | maxE = MAX32(maxE, E); |
| 650 | tonal->meanE[b] = MAX32((1-alphaE2)*tonal->meanE[b], E); |
| 651 | E = MAX32(E, tonal->meanE[b]); |
| 652 | /* Use a simple follower with 13 dB/Bark slope for spreading function */ |
| 653 | bandwidth_mask = MAX32(.05f*bandwidth_mask, E); |
| 654 | /* Consider the band "active" only if all these conditions are met: |
| 655 | 1) less than 10 dB below the simple follower |
| 656 | 2) less than 90 dB below the peak band (maximal masking possible considering |
| 657 | both the ATH and the loudness-dependent slope of the spreading function) |
| 658 | 3) above the PCM quantization noise floor |
Felicia Lim | 0c2090c | 2017-07-05 17:36:56 -0700 | [diff] [blame^] | 659 | We use b+1 because the first CELT band isn't included in tbands[] |
Vignesh Venkatasubramanian | 2bd8b54 | 2014-02-20 10:50:35 -0800 | [diff] [blame] | 660 | */ |
| 661 | if (E>.1*bandwidth_mask && E*1e9f > maxE && E > noise_floor*(band_end-band_start)) |
Felicia Lim | 0c2090c | 2017-07-05 17:36:56 -0700 | [diff] [blame^] | 662 | bandwidth = b+1; |
| 663 | } |
| 664 | /* Special case for the last two bands, for which we don't have spectrum but only |
| 665 | the energy above 12 kHz. */ |
| 666 | if (tonal->Fs == 48000) { |
| 667 | float ratio; |
| 668 | float E = hp_ener*(1.f/(240*240)); |
| 669 | ratio = tonal->prev_bandwidth==20 ? 0.03f : 0.07f; |
| 670 | #ifdef FIXED_POINT |
| 671 | /* silk_resampler_down2_hp() shifted right by an extra 8 bits. */ |
| 672 | E *= 256.f*(1.f/Q15ONE)*(1.f/Q15ONE); |
| 673 | #endif |
| 674 | maxE = MAX32(maxE, E); |
| 675 | tonal->meanE[b] = MAX32((1-alphaE2)*tonal->meanE[b], E); |
| 676 | E = MAX32(E, tonal->meanE[b]); |
| 677 | /* Use a simple follower with 13 dB/Bark slope for spreading function */ |
| 678 | bandwidth_mask = MAX32(.05f*bandwidth_mask, E); |
| 679 | if (E>ratio*bandwidth_mask && E*1e9f > maxE && E > noise_floor*160) |
| 680 | bandwidth = 20; |
| 681 | /* This detector is unreliable, so if the bandwidth is close to SWB, assume it's FB. */ |
| 682 | if (bandwidth >= 17) |
| 683 | bandwidth = 20; |
Vignesh Venkatasubramanian | 2bd8b54 | 2014-02-20 10:50:35 -0800 | [diff] [blame] | 684 | } |
| 685 | if (tonal->count<=2) |
| 686 | bandwidth = 20; |
| 687 | frame_loudness = 20*(float)log10(frame_loudness); |
Felicia Lim | 0c2090c | 2017-07-05 17:36:56 -0700 | [diff] [blame^] | 688 | tonal->Etracker = MAX32(tonal->Etracker-.003f, frame_loudness); |
Vignesh Venkatasubramanian | 2bd8b54 | 2014-02-20 10:50:35 -0800 | [diff] [blame] | 689 | tonal->lowECount *= (1-alphaE); |
| 690 | if (frame_loudness < tonal->Etracker-30) |
| 691 | tonal->lowECount += alphaE; |
| 692 | |
| 693 | for (i=0;i<8;i++) |
| 694 | { |
| 695 | float sum=0; |
| 696 | for (b=0;b<16;b++) |
| 697 | sum += dct_table[i*16+b]*logE[b]; |
| 698 | BFCC[i] = sum; |
| 699 | } |
Felicia Lim | 0c2090c | 2017-07-05 17:36:56 -0700 | [diff] [blame^] | 700 | for (i=0;i<8;i++) |
| 701 | { |
| 702 | float sum=0; |
| 703 | for (b=0;b<16;b++) |
| 704 | sum += dct_table[i*16+b]*.5f*(tonal->highE[b]+tonal->lowE[b]); |
| 705 | midE[i] = sum; |
| 706 | } |
Vignesh Venkatasubramanian | 2bd8b54 | 2014-02-20 10:50:35 -0800 | [diff] [blame] | 707 | |
| 708 | frame_stationarity /= NB_TBANDS; |
| 709 | relativeE /= NB_TBANDS; |
| 710 | if (tonal->count<10) |
Felicia Lim | 0c2090c | 2017-07-05 17:36:56 -0700 | [diff] [blame^] | 711 | relativeE = .5f; |
Vignesh Venkatasubramanian | 2bd8b54 | 2014-02-20 10:50:35 -0800 | [diff] [blame] | 712 | frame_noisiness /= NB_TBANDS; |
| 713 | #if 1 |
| 714 | info->activity = frame_noisiness + (1-frame_noisiness)*relativeE; |
| 715 | #else |
| 716 | info->activity = .5*(1+frame_noisiness-frame_stationarity); |
| 717 | #endif |
| 718 | frame_tonality = (max_frame_tonality/(NB_TBANDS-NB_TONAL_SKIP_BANDS)); |
| 719 | frame_tonality = MAX16(frame_tonality, tonal->prev_tonality*.8f); |
| 720 | tonal->prev_tonality = frame_tonality; |
| 721 | |
| 722 | slope /= 8*8; |
| 723 | info->tonality_slope = slope; |
| 724 | |
| 725 | tonal->E_count = (tonal->E_count+1)%NB_FRAMES; |
Felicia Lim | 0c2090c | 2017-07-05 17:36:56 -0700 | [diff] [blame^] | 726 | tonal->count = IMIN(tonal->count+1, ANALYSIS_COUNT_MAX); |
Vignesh Venkatasubramanian | 2bd8b54 | 2014-02-20 10:50:35 -0800 | [diff] [blame] | 727 | info->tonality = frame_tonality; |
| 728 | |
| 729 | for (i=0;i<4;i++) |
| 730 | features[i] = -0.12299f*(BFCC[i]+tonal->mem[i+24]) + 0.49195f*(tonal->mem[i]+tonal->mem[i+16]) + 0.69693f*tonal->mem[i+8] - 1.4349f*tonal->cmean[i]; |
| 731 | |
| 732 | for (i=0;i<4;i++) |
| 733 | tonal->cmean[i] = (1-alpha)*tonal->cmean[i] + alpha*BFCC[i]; |
| 734 | |
| 735 | for (i=0;i<4;i++) |
| 736 | features[4+i] = 0.63246f*(BFCC[i]-tonal->mem[i+24]) + 0.31623f*(tonal->mem[i]-tonal->mem[i+16]); |
| 737 | for (i=0;i<3;i++) |
| 738 | features[8+i] = 0.53452f*(BFCC[i]+tonal->mem[i+24]) - 0.26726f*(tonal->mem[i]+tonal->mem[i+16]) -0.53452f*tonal->mem[i+8]; |
| 739 | |
| 740 | if (tonal->count > 5) |
| 741 | { |
| 742 | for (i=0;i<9;i++) |
| 743 | tonal->std[i] = (1-alpha)*tonal->std[i] + alpha*features[i]*features[i]; |
| 744 | } |
Felicia Lim | 0c2090c | 2017-07-05 17:36:56 -0700 | [diff] [blame^] | 745 | for (i=0;i<4;i++) |
| 746 | features[i] = BFCC[i]-midE[i]; |
Vignesh Venkatasubramanian | 2bd8b54 | 2014-02-20 10:50:35 -0800 | [diff] [blame] | 747 | |
| 748 | for (i=0;i<8;i++) |
| 749 | { |
| 750 | tonal->mem[i+24] = tonal->mem[i+16]; |
| 751 | tonal->mem[i+16] = tonal->mem[i+8]; |
| 752 | tonal->mem[i+8] = tonal->mem[i]; |
| 753 | tonal->mem[i] = BFCC[i]; |
| 754 | } |
| 755 | for (i=0;i<9;i++) |
Felicia Lim | 0c2090c | 2017-07-05 17:36:56 -0700 | [diff] [blame^] | 756 | features[11+i] = (float)sqrt(tonal->std[i]) - std_feature_bias[i]; |
| 757 | features[18] = spec_variability - 0.78f; |
| 758 | features[20] = info->tonality - 0.154723f; |
| 759 | features[21] = info->activity - 0.724643f; |
| 760 | features[22] = frame_stationarity - 0.743717f; |
| 761 | features[23] = info->tonality_slope + 0.069216f; |
| 762 | features[24] = tonal->lowECount - 0.067930f; |
Vignesh Venkatasubramanian | 2bd8b54 | 2014-02-20 10:50:35 -0800 | [diff] [blame] | 763 | |
Vignesh Venkatasubramanian | 2bd8b54 | 2014-02-20 10:50:35 -0800 | [diff] [blame] | 764 | mlp_process(&net, features, frame_probs); |
| 765 | frame_probs[0] = .5f*(frame_probs[0]+1); |
| 766 | /* Curve fitting between the MLP probability and the actual probability */ |
Felicia Lim | 0c2090c | 2017-07-05 17:36:56 -0700 | [diff] [blame^] | 767 | /*frame_probs[0] = .01f + 1.21f*frame_probs[0]*frame_probs[0] - .23f*(float)pow(frame_probs[0], 10);*/ |
Vignesh Venkatasubramanian | 2bd8b54 | 2014-02-20 10:50:35 -0800 | [diff] [blame] | 768 | /* Probability of active audio (as opposed to silence) */ |
| 769 | frame_probs[1] = .5f*frame_probs[1]+.5f; |
Felicia Lim | 0c2090c | 2017-07-05 17:36:56 -0700 | [diff] [blame^] | 770 | frame_probs[1] *= frame_probs[1]; |
Vignesh Venkatasubramanian | 2bd8b54 | 2014-02-20 10:50:35 -0800 | [diff] [blame] | 771 | |
Felicia Lim | 0c2090c | 2017-07-05 17:36:56 -0700 | [diff] [blame^] | 772 | /* Probability of speech or music vs noise */ |
| 773 | info->activity_probability = frame_probs[1]; |
| 774 | |
| 775 | /*printf("%f %f\n", frame_probs[0], frame_probs[1]);*/ |
Vignesh Venkatasubramanian | 2bd8b54 | 2014-02-20 10:50:35 -0800 | [diff] [blame] | 776 | { |
| 777 | /* Probability of state transition */ |
| 778 | float tau; |
| 779 | /* Represents independence of the MLP probabilities, where |
| 780 | beta=1 means fully independent. */ |
| 781 | float beta; |
| 782 | /* Denormalized probability of speech (p0) and music (p1) after update */ |
| 783 | float p0, p1; |
| 784 | /* Probabilities for "all speech" and "all music" */ |
| 785 | float s0, m0; |
| 786 | /* Probability sum for renormalisation */ |
| 787 | float psum; |
| 788 | /* Instantaneous probability of speech and music, with beta pre-applied. */ |
| 789 | float speech0; |
| 790 | float music0; |
Felicia Lim | d03c373 | 2016-07-25 20:28:37 +0200 | [diff] [blame] | 791 | float p, q; |
Vignesh Venkatasubramanian | 2bd8b54 | 2014-02-20 10:50:35 -0800 | [diff] [blame] | 792 | |
Felicia Lim | 0c2090c | 2017-07-05 17:36:56 -0700 | [diff] [blame^] | 793 | /* More silence transitions for speech than for music. */ |
| 794 | tau = .001f*tonal->music_prob + .01f*(1-tonal->music_prob); |
| 795 | p = MAX16(.05f,MIN16(.95f,frame_probs[1])); |
| 796 | q = MAX16(.05f,MIN16(.95f,tonal->vad_prob)); |
| 797 | beta = .02f+.05f*ABS16(p-q)/(p*(1-q)+q*(1-p)); |
| 798 | /* p0 and p1 are the probabilities of speech and music at this frame |
| 799 | using only information from previous frame and applying the |
| 800 | state transition model */ |
| 801 | p0 = (1-tonal->vad_prob)*(1-tau) + tonal->vad_prob *tau; |
| 802 | p1 = tonal->vad_prob *(1-tau) + (1-tonal->vad_prob)*tau; |
| 803 | /* We apply the current probability with exponent beta to work around |
| 804 | the fact that the probability estimates aren't independent. */ |
| 805 | p0 *= (float)pow(1-frame_probs[1], beta); |
| 806 | p1 *= (float)pow(frame_probs[1], beta); |
| 807 | /* Normalise the probabilities to get the Marokv probability of music. */ |
| 808 | tonal->vad_prob = p1/(p0+p1); |
| 809 | info->vad_prob = tonal->vad_prob; |
| 810 | /* Consider that silence has a 50-50 probability of being speech or music. */ |
| 811 | frame_probs[0] = tonal->vad_prob*frame_probs[0] + (1-tonal->vad_prob)*.5f; |
| 812 | |
Vignesh Venkatasubramanian | 2bd8b54 | 2014-02-20 10:50:35 -0800 | [diff] [blame] | 813 | /* One transition every 3 minutes of active audio */ |
Felicia Lim | 0c2090c | 2017-07-05 17:36:56 -0700 | [diff] [blame^] | 814 | tau = .0001f; |
Felicia Lim | d03c373 | 2016-07-25 20:28:37 +0200 | [diff] [blame] | 815 | /* Adapt beta based on how "unexpected" the new prob is */ |
| 816 | p = MAX16(.05f,MIN16(.95f,frame_probs[0])); |
| 817 | q = MAX16(.05f,MIN16(.95f,tonal->music_prob)); |
Felicia Lim | 0c2090c | 2017-07-05 17:36:56 -0700 | [diff] [blame^] | 818 | beta = .02f+.05f*ABS16(p-q)/(p*(1-q)+q*(1-p)); |
Vignesh Venkatasubramanian | 2bd8b54 | 2014-02-20 10:50:35 -0800 | [diff] [blame] | 819 | /* p0 and p1 are the probabilities of speech and music at this frame |
| 820 | using only information from previous frame and applying the |
| 821 | state transition model */ |
| 822 | p0 = (1-tonal->music_prob)*(1-tau) + tonal->music_prob *tau; |
| 823 | p1 = tonal->music_prob *(1-tau) + (1-tonal->music_prob)*tau; |
| 824 | /* We apply the current probability with exponent beta to work around |
| 825 | the fact that the probability estimates aren't independent. */ |
| 826 | p0 *= (float)pow(1-frame_probs[0], beta); |
| 827 | p1 *= (float)pow(frame_probs[0], beta); |
| 828 | /* Normalise the probabilities to get the Marokv probability of music. */ |
| 829 | tonal->music_prob = p1/(p0+p1); |
| 830 | info->music_prob = tonal->music_prob; |
| 831 | |
Felicia Lim | 0c2090c | 2017-07-05 17:36:56 -0700 | [diff] [blame^] | 832 | /*printf("%f %f %f %f\n", frame_probs[0], frame_probs[1], tonal->music_prob, tonal->vad_prob);*/ |
Vignesh Venkatasubramanian | 2bd8b54 | 2014-02-20 10:50:35 -0800 | [diff] [blame] | 833 | /* This chunk of code deals with delayed decision. */ |
| 834 | psum=1e-20f; |
| 835 | /* Instantaneous probability of speech and music, with beta pre-applied. */ |
| 836 | speech0 = (float)pow(1-frame_probs[0], beta); |
| 837 | music0 = (float)pow(frame_probs[0], beta); |
| 838 | if (tonal->count==1) |
| 839 | { |
Felicia Lim | 0c2090c | 2017-07-05 17:36:56 -0700 | [diff] [blame^] | 840 | if (tonal->application == OPUS_APPLICATION_VOIP) |
| 841 | tonal->pmusic[0] = .1f; |
| 842 | else |
| 843 | tonal->pmusic[0] = .625f; |
| 844 | tonal->pspeech[0] = 1-tonal->pmusic[0]; |
Vignesh Venkatasubramanian | 2bd8b54 | 2014-02-20 10:50:35 -0800 | [diff] [blame] | 845 | } |
| 846 | /* Updated probability of having only speech (s0) or only music (m0), |
| 847 | before considering the new observation. */ |
| 848 | s0 = tonal->pspeech[0] + tonal->pspeech[1]; |
| 849 | m0 = tonal->pmusic [0] + tonal->pmusic [1]; |
| 850 | /* Updates s0 and m0 with instantaneous probability. */ |
| 851 | tonal->pspeech[0] = s0*(1-tau)*speech0; |
| 852 | tonal->pmusic [0] = m0*(1-tau)*music0; |
| 853 | /* Propagate the transition probabilities */ |
| 854 | for (i=1;i<DETECT_SIZE-1;i++) |
| 855 | { |
| 856 | tonal->pspeech[i] = tonal->pspeech[i+1]*speech0; |
| 857 | tonal->pmusic [i] = tonal->pmusic [i+1]*music0; |
| 858 | } |
| 859 | /* Probability that the latest frame is speech, when all the previous ones were music. */ |
| 860 | tonal->pspeech[DETECT_SIZE-1] = m0*tau*speech0; |
| 861 | /* Probability that the latest frame is music, when all the previous ones were speech. */ |
| 862 | tonal->pmusic [DETECT_SIZE-1] = s0*tau*music0; |
| 863 | |
| 864 | /* Renormalise probabilities to 1 */ |
| 865 | for (i=0;i<DETECT_SIZE;i++) |
| 866 | psum += tonal->pspeech[i] + tonal->pmusic[i]; |
| 867 | psum = 1.f/psum; |
| 868 | for (i=0;i<DETECT_SIZE;i++) |
| 869 | { |
| 870 | tonal->pspeech[i] *= psum; |
| 871 | tonal->pmusic [i] *= psum; |
| 872 | } |
| 873 | psum = tonal->pmusic[0]; |
| 874 | for (i=1;i<DETECT_SIZE;i++) |
| 875 | psum += tonal->pspeech[i]; |
| 876 | |
| 877 | /* Estimate our confidence in the speech/music decisions */ |
| 878 | if (frame_probs[1]>.75) |
| 879 | { |
| 880 | if (tonal->music_prob>.9) |
| 881 | { |
| 882 | float adapt; |
| 883 | adapt = 1.f/(++tonal->music_confidence_count); |
| 884 | tonal->music_confidence_count = IMIN(tonal->music_confidence_count, 500); |
| 885 | tonal->music_confidence += adapt*MAX16(-.2f,frame_probs[0]-tonal->music_confidence); |
| 886 | } |
| 887 | if (tonal->music_prob<.1) |
| 888 | { |
| 889 | float adapt; |
| 890 | adapt = 1.f/(++tonal->speech_confidence_count); |
| 891 | tonal->speech_confidence_count = IMIN(tonal->speech_confidence_count, 500); |
| 892 | tonal->speech_confidence += adapt*MIN16(.2f,frame_probs[0]-tonal->speech_confidence); |
| 893 | } |
Vignesh Venkatasubramanian | 2bd8b54 | 2014-02-20 10:50:35 -0800 | [diff] [blame] | 894 | } |
| 895 | } |
Vignesh Venkatasubramanian | 2bd8b54 | 2014-02-20 10:50:35 -0800 | [diff] [blame] | 896 | tonal->last_music = tonal->music_prob>.5f; |
Felicia Lim | 0c2090c | 2017-07-05 17:36:56 -0700 | [diff] [blame^] | 897 | #ifdef MLP_TRAINING |
| 898 | for (i=0;i<25;i++) |
Vignesh Venkatasubramanian | 2bd8b54 | 2014-02-20 10:50:35 -0800 | [diff] [blame] | 899 | printf("%f ", features[i]); |
Felicia Lim | 0c2090c | 2017-07-05 17:36:56 -0700 | [diff] [blame^] | 900 | printf("\n"); |
| 901 | #endif |
Vignesh Venkatasubramanian | 2bd8b54 | 2014-02-20 10:50:35 -0800 | [diff] [blame] | 902 | |
| 903 | info->bandwidth = bandwidth; |
Felicia Lim | 0c2090c | 2017-07-05 17:36:56 -0700 | [diff] [blame^] | 904 | tonal->prev_bandwidth = bandwidth; |
Vignesh Venkatasubramanian | 2bd8b54 | 2014-02-20 10:50:35 -0800 | [diff] [blame] | 905 | /*printf("%d %d\n", info->bandwidth, info->opus_bandwidth);*/ |
| 906 | info->noisiness = frame_noisiness; |
| 907 | info->valid = 1; |
Vignesh Venkatasubramanian | 2bd8b54 | 2014-02-20 10:50:35 -0800 | [diff] [blame] | 908 | RESTORE_STACK; |
| 909 | } |
| 910 | |
| 911 | void run_analysis(TonalityAnalysisState *analysis, const CELTMode *celt_mode, const void *analysis_pcm, |
| 912 | int analysis_frame_size, int frame_size, int c1, int c2, int C, opus_int32 Fs, |
| 913 | int lsb_depth, downmix_func downmix, AnalysisInfo *analysis_info) |
| 914 | { |
| 915 | int offset; |
| 916 | int pcm_len; |
| 917 | |
Felicia Lim | 0c2090c | 2017-07-05 17:36:56 -0700 | [diff] [blame^] | 918 | analysis_frame_size -= analysis_frame_size&1; |
Vignesh Venkatasubramanian | 2bd8b54 | 2014-02-20 10:50:35 -0800 | [diff] [blame] | 919 | if (analysis_pcm != NULL) |
| 920 | { |
| 921 | /* Avoid overflow/wrap-around of the analysis buffer */ |
Felicia Lim | 0c2090c | 2017-07-05 17:36:56 -0700 | [diff] [blame^] | 922 | analysis_frame_size = IMIN((DETECT_SIZE-5)*Fs/50, analysis_frame_size); |
Vignesh Venkatasubramanian | 2bd8b54 | 2014-02-20 10:50:35 -0800 | [diff] [blame] | 923 | |
| 924 | pcm_len = analysis_frame_size - analysis->analysis_offset; |
| 925 | offset = analysis->analysis_offset; |
Felicia Lim | 0c2090c | 2017-07-05 17:36:56 -0700 | [diff] [blame^] | 926 | while (pcm_len>0) { |
| 927 | tonality_analysis(analysis, celt_mode, analysis_pcm, IMIN(Fs/50, pcm_len), offset, c1, c2, C, lsb_depth, downmix); |
| 928 | offset += Fs/50; |
| 929 | pcm_len -= Fs/50; |
| 930 | } |
Vignesh Venkatasubramanian | 2bd8b54 | 2014-02-20 10:50:35 -0800 | [diff] [blame] | 931 | analysis->analysis_offset = analysis_frame_size; |
| 932 | |
| 933 | analysis->analysis_offset -= frame_size; |
| 934 | } |
| 935 | |
| 936 | analysis_info->valid = 0; |
| 937 | tonality_get_info(analysis, analysis_info, frame_size); |
| 938 | } |
Felicia Lim | 0c2090c | 2017-07-05 17:36:56 -0700 | [diff] [blame^] | 939 | |
| 940 | #endif /* DISABLE_FLOAT_API */ |