| Line | Branch | Exec | Source |
|---|---|---|---|
| 1 | /* | ||
| 2 | * AAC Spectral Band Replication decoding functions | ||
| 3 | * Copyright (c) 2008-2009 Robert Swain ( rob opendot cl ) | ||
| 4 | * Copyright (c) 2009-2010 Alex Converse <alex.converse@gmail.com> | ||
| 5 | * | ||
| 6 | * Fixed point code | ||
| 7 | * Copyright (c) 2013 | ||
| 8 | * MIPS Technologies, Inc., California. | ||
| 9 | * | ||
| 10 | * This file is part of FFmpeg. | ||
| 11 | * | ||
| 12 | * FFmpeg is free software; you can redistribute it and/or | ||
| 13 | * modify it under the terms of the GNU Lesser General Public | ||
| 14 | * License as published by the Free Software Foundation; either | ||
| 15 | * version 2.1 of the License, or (at your option) any later version. | ||
| 16 | * | ||
| 17 | * FFmpeg is distributed in the hope that it will be useful, | ||
| 18 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
| 19 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | ||
| 20 | * Lesser General Public License for more details. | ||
| 21 | * | ||
| 22 | * You should have received a copy of the GNU Lesser General Public | ||
| 23 | * License along with FFmpeg; if not, write to the Free Software | ||
| 24 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | ||
| 25 | */ | ||
| 26 | |||
| 27 | /** | ||
| 28 | * @file | ||
| 29 | * AAC Spectral Band Replication decoding functions | ||
| 30 | * @author Robert Swain ( rob opendot cl ) | ||
| 31 | * @author Stanislav Ocovaj ( stanislav.ocovaj@imgtec.com ) | ||
| 32 | * @author Zoran Basaric ( zoran.basaric@imgtec.com ) | ||
| 33 | */ | ||
| 34 | |||
| 35 | #include "aac/aacdec.h" | ||
| 36 | #include "aac/aacdec_tab.h" | ||
| 37 | #include "avcodec.h" | ||
| 38 | #include "libavutil/qsort.h" | ||
| 39 | #include "libavutil/mem.h" | ||
| 40 | |||
| 41 | typedef struct ExtChannelElement { | ||
| 42 | ChannelElement ch; | ||
| 43 | PredictorState predictor_state[2][MAX_PREDICTORS]; | ||
| 44 | SpectralBandReplication sbr; | ||
| 45 | } ExtChannelElement; | ||
| 46 | |||
| 47 | 23718 | static inline SpectralBandReplication *get_sbr(ChannelElement *ch) | |
| 48 | { | ||
| 49 | 23718 | return &((ExtChannelElement*)ch)->sbr; | |
| 50 | } | ||
| 51 | |||
| 52 | 185 | av_cold void AAC_RENAME(ff_aac_sbr_init)(void) | |
| 53 | { | ||
| 54 | 185 | AAC_RENAME(ff_ps_init)(); | |
| 55 | 185 | } | |
| 56 | |||
| 57 | /** Places SBR in pure upsampling mode. */ | ||
| 58 | 406 | static void sbr_turnoff(SpectralBandReplication *sbr) { | |
| 59 | 406 | sbr->start = 0; | |
| 60 | 406 | sbr->usac = 0; | |
| 61 | 406 | sbr->ready_for_dequant = 0; | |
| 62 | // Init defaults used in pure upsampling mode | ||
| 63 | 406 | sbr->kx[1] = 32; //Typo in spec, kx' inits to 32 | |
| 64 | 406 | sbr->m[1] = 0; | |
| 65 | // Reset values for first SBR header | ||
| 66 | 406 | sbr->data[0].e_a[1] = sbr->data[1].e_a[1] = -1; | |
| 67 | 406 | memset(&sbr->spectrum_params, -1, sizeof(SpectrumParameters)); | |
| 68 | 406 | } | |
| 69 | |||
| 70 | 406 | av_cold int AAC_RENAME(ff_aac_sbr_ctx_alloc_init)(AACDecContext *ac, | |
| 71 | ChannelElement **che, int id_aac) | ||
| 72 | { | ||
| 73 | SpectralBandReplication *sbr; | ||
| 74 | 406 | ExtChannelElement *ext = av_mallocz(sizeof(*ext)); | |
| 75 | int ret; | ||
| 76 | float scale; | ||
| 77 | |||
| 78 |
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406 | if (!ext) |
| 79 | ✗ | return AVERROR(ENOMEM); | |
| 80 | 406 | *che = &ext->ch; | |
| 81 | 406 | sbr = &ext->sbr; | |
| 82 | 406 | ext->ch.ch[0].AAC_RENAME(predictor_state) = ext->predictor_state[0]; | |
| 83 | 406 | ext->ch.ch[1].AAC_RENAME(predictor_state) = ext->predictor_state[1]; | |
| 84 | |||
| 85 | 406 | sbr->kx[0] = sbr->kx[1]; | |
| 86 | 406 | sbr->id_aac = id_aac; | |
| 87 | 406 | sbr_turnoff(sbr); | |
| 88 | 406 | sbr->data[0].synthesis_filterbank_samples_offset = SBR_SYNTHESIS_BUF_SIZE - (1280 - 128); | |
| 89 | 406 | sbr->data[1].synthesis_filterbank_samples_offset = SBR_SYNTHESIS_BUF_SIZE - (1280 - 128); | |
| 90 | /* SBR requires samples to be scaled to +/-32768.0 to work correctly. | ||
| 91 | * mdct scale factors are adjusted to scale up from +/-1.0 at analysis | ||
| 92 | * and scale back down at synthesis. */ | ||
| 93 | |||
| 94 | 406 | scale = USE_FIXED ? 1 : 1.0 / (64 * 32768); | |
| 95 | 406 | ret = av_tx_init(&sbr->mdct, &sbr->mdct_fn, | |
| 96 | USE_FIXED ? AV_TX_INT32_MDCT : AV_TX_FLOAT_MDCT, | ||
| 97 | 1, 64, &scale, 0); | ||
| 98 |
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406 | if (ret < 0) |
| 99 | ✗ | return ret; | |
| 100 | |||
| 101 | 406 | scale = USE_FIXED ? -1.0 : -2.0 * 32768; | |
| 102 | 406 | ret = av_tx_init(&sbr->mdct_ana, &sbr->mdct_ana_fn, | |
| 103 | USE_FIXED ? AV_TX_INT32_MDCT : AV_TX_FLOAT_MDCT, | ||
| 104 | 1, 64, &scale, 0); | ||
| 105 |
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406 | if (ret < 0) |
| 106 | ✗ | return ret; | |
| 107 | |||
| 108 | 406 | AAC_RENAME(ff_ps_ctx_init)(&sbr->ps); | |
| 109 | 406 | AAC_RENAME(ff_sbrdsp_init)(&sbr->dsp); | |
| 110 | 406 | aacsbr_func_ptr_init(&sbr->c); | |
| 111 | |||
| 112 | 406 | return 0; | |
| 113 | } | ||
| 114 | |||
| 115 | 406 | av_cold void AAC_RENAME(ff_aac_sbr_ctx_close)(ChannelElement *che) | |
| 116 | { | ||
| 117 | 406 | SpectralBandReplication *sbr = get_sbr(che); | |
| 118 | 406 | av_tx_uninit(&sbr->mdct); | |
| 119 | 406 | av_tx_uninit(&sbr->mdct_ana); | |
| 120 | 406 | } | |
| 121 | |||
| 122 | 6109 | static int qsort_comparison_function_int16(const void *a, const void *b) | |
| 123 | { | ||
| 124 | 6109 | return *(const int16_t *)a - *(const int16_t *)b; | |
| 125 | } | ||
| 126 | |||
| 127 | 381 | static inline int in_table_int16(const int16_t *table, int last_el, int16_t needle) | |
| 128 | { | ||
| 129 | int i; | ||
| 130 |
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1771 | for (i = 0; i <= last_el; i++) |
| 131 |
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1532 | if (table[i] == needle) |
| 132 | 142 | return 1; | |
| 133 | 239 | return 0; | |
| 134 | } | ||
| 135 | |||
| 136 | /// Limiter Frequency Band Table (14496-3 sp04 p198) | ||
| 137 | 65 | static void sbr_make_f_tablelim(SpectralBandReplication *sbr) | |
| 138 | { | ||
| 139 | int k; | ||
| 140 |
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65 | if (sbr->bs_limiter_bands > 0) { |
| 141 | static const INTFLOAT bands_warped[3] = { Q23(1.32715174233856803909f), //2^(0.49/1.2) | ||
| 142 | Q23(1.18509277094158210129f), //2^(0.49/2) | ||
| 143 | Q23(1.11987160404675912501f) }; //2^(0.49/3) | ||
| 144 | 65 | const INTFLOAT lim_bands_per_octave_warped = bands_warped[sbr->bs_limiter_bands - 1]; | |
| 145 | int16_t patch_borders[7]; | ||
| 146 | 65 | uint16_t *in = sbr->f_tablelim + 1, *out = sbr->f_tablelim; | |
| 147 | |||
| 148 | 65 | patch_borders[0] = sbr->kx[1]; | |
| 149 |
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251 | for (k = 1; k <= sbr->num_patches; k++) |
| 150 | 186 | patch_borders[k] = patch_borders[k-1] + sbr->patch_num_subbands[k-1]; | |
| 151 | |||
| 152 | 65 | memcpy(sbr->f_tablelim, sbr->f_tablelow, | |
| 153 | 65 | (sbr->n[0] + 1) * sizeof(sbr->f_tablelow[0])); | |
| 154 |
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65 | if (sbr->num_patches > 1) |
| 155 | 63 | memcpy(sbr->f_tablelim + sbr->n[0] + 1, patch_borders + 1, | |
| 156 | 63 | (sbr->num_patches - 1) * sizeof(patch_borders[0])); | |
| 157 | |||
| 158 |
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1700 | AV_QSORT(sbr->f_tablelim, sbr->num_patches + sbr->n[0], |
| 159 | uint16_t, | ||
| 160 | qsort_comparison_function_int16); | ||
| 161 | |||
| 162 | 65 | sbr->n_lim = sbr->n[0] + sbr->num_patches - 1; | |
| 163 |
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606 | while (out < sbr->f_tablelim + sbr->n_lim) { |
| 164 | #if USE_FIXED | ||
| 165 |
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35 | if ((*in << 23) >= *out * lim_bands_per_octave_warped) { |
| 166 | #else | ||
| 167 |
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506 | if (*in >= *out * lim_bands_per_octave_warped) { |
| 168 | #endif /* USE_FIXED */ | ||
| 169 | 212 | *++out = *in++; | |
| 170 |
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612 | } else if (*in == *out || |
| 171 | 283 | !in_table_int16(patch_borders, sbr->num_patches, *in)) { | |
| 172 | 231 | in++; | |
| 173 | 231 | sbr->n_lim--; | |
| 174 |
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98 | } else if (!in_table_int16(patch_borders, sbr->num_patches, *out)) { |
| 175 | 54 | *out = *in++; | |
| 176 | 54 | sbr->n_lim--; | |
| 177 | } else { | ||
| 178 | 44 | *++out = *in++; | |
| 179 | } | ||
| 180 | } | ||
| 181 | } else { | ||
| 182 | ✗ | sbr->f_tablelim[0] = sbr->f_tablelow[0]; | |
| 183 | ✗ | sbr->f_tablelim[1] = sbr->f_tablelow[sbr->n[0]]; | |
| 184 | ✗ | sbr->n_lim = 1; | |
| 185 | } | ||
| 186 | 65 | } | |
| 187 | |||
| 188 | 489 | static unsigned int read_sbr_header(SpectralBandReplication *sbr, | |
| 189 | GetBitContext *gb, int is_usac) | ||
| 190 | { | ||
| 191 | 489 | unsigned int cnt = get_bits_count(gb); | |
| 192 | uint8_t bs_header_extra_1; | ||
| 193 | uint8_t bs_header_extra_2; | ||
| 194 | 489 | int old_bs_limiter_bands = sbr->bs_limiter_bands; | |
| 195 | SpectrumParameters old_spectrum_params; | ||
| 196 | |||
| 197 | 489 | sbr->start = 1; | |
| 198 | 489 | sbr->ready_for_dequant = 0; | |
| 199 | 489 | sbr->usac = is_usac; | |
| 200 | |||
| 201 | // Save last spectrum parameters variables to compare to new ones | ||
| 202 | 489 | memcpy(&old_spectrum_params, &sbr->spectrum_params, sizeof(SpectrumParameters)); | |
| 203 | |||
| 204 |
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489 | if (!is_usac) |
| 205 | 489 | sbr->bs_amp_res_header = get_bits1(gb); | |
| 206 | |||
| 207 | 489 | sbr->spectrum_params.bs_start_freq = get_bits(gb, 4); | |
| 208 | 489 | sbr->spectrum_params.bs_stop_freq = get_bits(gb, 4); | |
| 209 | |||
| 210 |
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489 | if (!is_usac) |
| 211 | 489 | sbr->spectrum_params.bs_xover_band = get_bits(gb, 3); | |
| 212 | 489 | skip_bits(gb, 2); // bs_reserved | |
| 213 | |||
| 214 | 489 | bs_header_extra_1 = get_bits1(gb); | |
| 215 | 489 | bs_header_extra_2 = get_bits1(gb); | |
| 216 | |||
| 217 |
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489 | if (bs_header_extra_1) { |
| 218 | 430 | sbr->spectrum_params.bs_freq_scale = get_bits(gb, 2); | |
| 219 | 430 | sbr->spectrum_params.bs_alter_scale = get_bits1(gb); | |
| 220 | 430 | sbr->spectrum_params.bs_noise_bands = get_bits(gb, 2); | |
| 221 | } else { | ||
| 222 | 59 | sbr->spectrum_params.bs_freq_scale = 2; | |
| 223 | 59 | sbr->spectrum_params.bs_alter_scale = 1; | |
| 224 | 59 | sbr->spectrum_params.bs_noise_bands = 2; | |
| 225 | } | ||
| 226 | |||
| 227 | // Check if spectrum parameters changed | ||
| 228 |
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489 | if (memcmp(&old_spectrum_params, &sbr->spectrum_params, sizeof(SpectrumParameters))) |
| 229 | 65 | sbr->reset = 1; | |
| 230 | |||
| 231 |
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489 | if (bs_header_extra_2) { |
| 232 | 26 | sbr->bs_limiter_bands = get_bits(gb, 2); | |
| 233 | 26 | sbr->bs_limiter_gains = get_bits(gb, 2); | |
| 234 | 26 | sbr->bs_interpol_freq = get_bits1(gb); | |
| 235 | 26 | sbr->bs_smoothing_mode = get_bits1(gb); | |
| 236 | } else { | ||
| 237 | 463 | sbr->bs_limiter_bands = 2; | |
| 238 | 463 | sbr->bs_limiter_gains = 2; | |
| 239 | 463 | sbr->bs_interpol_freq = 1; | |
| 240 | 463 | sbr->bs_smoothing_mode = 1; | |
| 241 | } | ||
| 242 | |||
| 243 |
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489 | if (sbr->bs_limiter_bands != old_bs_limiter_bands && !sbr->reset) |
| 244 | ✗ | sbr_make_f_tablelim(sbr); | |
| 245 | |||
| 246 | 489 | return get_bits_count(gb) - cnt; | |
| 247 | } | ||
| 248 | |||
| 249 | 12 | static int array_min_int16(const int16_t *array, int nel) | |
| 250 | { | ||
| 251 | 12 | int i, min = array[0]; | |
| 252 |
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28 | for (i = 1; i < nel; i++) |
| 253 | 16 | min = FFMIN(array[i], min); | |
| 254 | 12 | return min; | |
| 255 | } | ||
| 256 | |||
| 257 | 65 | static int check_n_master(AVCodecContext *avctx, int n_master, int bs_xover_band) | |
| 258 | { | ||
| 259 | // Requirements (14496-3 sp04 p205) | ||
| 260 |
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65 | if (n_master <= 0) { |
| 261 | ✗ | av_log(avctx, AV_LOG_ERROR, "Invalid n_master: %d\n", n_master); | |
| 262 | ✗ | return -1; | |
| 263 | } | ||
| 264 |
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65 | if (bs_xover_band >= n_master) { |
| 265 | ✗ | av_log(avctx, AV_LOG_ERROR, | |
| 266 | "Invalid bitstream, crossover band index beyond array bounds: %d\n", | ||
| 267 | bs_xover_band); | ||
| 268 | ✗ | return -1; | |
| 269 | } | ||
| 270 | 65 | return 0; | |
| 271 | } | ||
| 272 | |||
| 273 | /// Master Frequency Band Table (14496-3 sp04 p194) | ||
| 274 | 65 | static int sbr_make_f_master(AACDecContext *ac, SpectralBandReplication *sbr, | |
| 275 | SpectrumParameters *spectrum) | ||
| 276 | { | ||
| 277 | 65 | unsigned int temp, max_qmf_subbands = 0; | |
| 278 | unsigned int start_min, stop_min; | ||
| 279 | int k; | ||
| 280 | const int8_t *sbr_offset_ptr; | ||
| 281 | int16_t stop_dk[13]; | ||
| 282 | |||
| 283 |
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65 | switch (sbr->sample_rate) { |
| 284 | 6 | case 16000: | |
| 285 | 6 | sbr_offset_ptr = sbr_offset[0]; | |
| 286 | 6 | break; | |
| 287 | ✗ | case 22050: | |
| 288 | ✗ | sbr_offset_ptr = sbr_offset[1]; | |
| 289 | ✗ | break; | |
| 290 | ✗ | case 24000: | |
| 291 | ✗ | sbr_offset_ptr = sbr_offset[2]; | |
| 292 | ✗ | break; | |
| 293 | 12 | case 32000: | |
| 294 | 12 | sbr_offset_ptr = sbr_offset[3]; | |
| 295 | 12 | break; | |
| 296 | 45 | case 44100: case 48000: case 64000: | |
| 297 | 45 | sbr_offset_ptr = sbr_offset[4]; | |
| 298 | 45 | break; | |
| 299 | 2 | case 88200: case 96000: case 128000: case 176400: case 192000: | |
| 300 | 2 | sbr_offset_ptr = sbr_offset[5]; | |
| 301 | 2 | break; | |
| 302 | ✗ | default: | |
| 303 | ✗ | av_log(ac->avctx, AV_LOG_ERROR, | |
| 304 | "Unsupported sample rate for SBR: %d\n", sbr->sample_rate); | ||
| 305 | ✗ | return -1; | |
| 306 | } | ||
| 307 | |||
| 308 |
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65 | if (sbr->sample_rate < 32000) { |
| 309 | 6 | temp = 3000; | |
| 310 |
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59 | } else if (sbr->sample_rate < 64000) { |
| 311 | 57 | temp = 4000; | |
| 312 | } else | ||
| 313 | 2 | temp = 5000; | |
| 314 | |||
| 315 | 65 | start_min = ((temp << 7) + (sbr->sample_rate >> 1)) / sbr->sample_rate; | |
| 316 | 65 | stop_min = ((temp << 8) + (sbr->sample_rate >> 1)) / sbr->sample_rate; | |
| 317 | |||
| 318 | 65 | sbr->k[0] = start_min + sbr_offset_ptr[spectrum->bs_start_freq]; | |
| 319 | |||
| 320 |
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65 | if (spectrum->bs_stop_freq < 14) { |
| 321 | 65 | sbr->k[2] = stop_min; | |
| 322 | 65 | make_bands(stop_dk, stop_min, 64, 13); | |
| 323 |
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2030 | AV_QSORT(stop_dk, 13, int16_t, qsort_comparison_function_int16); |
| 324 |
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725 | for (k = 0; k < spectrum->bs_stop_freq; k++) |
| 325 | 660 | sbr->k[2] += stop_dk[k]; | |
| 326 | ✗ | } else if (spectrum->bs_stop_freq == 14) { | |
| 327 | ✗ | sbr->k[2] = 2*sbr->k[0]; | |
| 328 | ✗ | } else if (spectrum->bs_stop_freq == 15) { | |
| 329 | ✗ | sbr->k[2] = 3*sbr->k[0]; | |
| 330 | } else { | ||
| 331 | ✗ | av_log(ac->avctx, AV_LOG_ERROR, | |
| 332 | ✗ | "Invalid bs_stop_freq: %d\n", spectrum->bs_stop_freq); | |
| 333 | ✗ | return -1; | |
| 334 | } | ||
| 335 | 65 | sbr->k[2] = FFMIN(64, sbr->k[2]); | |
| 336 | |||
| 337 | // Requirements (14496-3 sp04 p205) | ||
| 338 |
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65 | if (sbr->sample_rate <= 32000) { |
| 339 | 18 | max_qmf_subbands = 48; | |
| 340 |
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47 | } else if (sbr->sample_rate == 44100) { |
| 341 | 36 | max_qmf_subbands = 35; | |
| 342 |
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11 | } else if (sbr->sample_rate >= 48000) |
| 343 | 11 | max_qmf_subbands = 32; | |
| 344 | else | ||
| 345 | ✗ | av_assert0(0); | |
| 346 | |||
| 347 |
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65 | if (sbr->k[2] - sbr->k[0] > max_qmf_subbands) { |
| 348 | ✗ | av_log(ac->avctx, AV_LOG_ERROR, | |
| 349 | ✗ | "Invalid bitstream, too many QMF subbands: %d\n", sbr->k[2] - sbr->k[0]); | |
| 350 | ✗ | return -1; | |
| 351 | } | ||
| 352 | |||
| 353 |
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65 | if (!spectrum->bs_freq_scale) { |
| 354 | int dk, k2diff; | ||
| 355 | |||
| 356 | 14 | dk = spectrum->bs_alter_scale + 1; | |
| 357 | 14 | sbr->n_master = ((sbr->k[2] - sbr->k[0] + (dk&2)) >> dk) << 1; | |
| 358 |
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14 | if (check_n_master(ac->avctx, sbr->n_master, sbr->spectrum_params.bs_xover_band)) |
| 359 | ✗ | return -1; | |
| 360 | |||
| 361 |
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266 | for (k = 1; k <= sbr->n_master; k++) |
| 362 | 252 | sbr->f_master[k] = dk; | |
| 363 | |||
| 364 | 14 | k2diff = sbr->k[2] - sbr->k[0] - sbr->n_master * dk; | |
| 365 |
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14 | if (k2diff < 0) { |
| 366 | 14 | sbr->f_master[1]--; | |
| 367 | 14 | sbr->f_master[2]-= (k2diff < -1); | |
| 368 | ✗ | } else if (k2diff) { | |
| 369 | ✗ | sbr->f_master[sbr->n_master]++; | |
| 370 | } | ||
| 371 | |||
| 372 | 14 | sbr->f_master[0] = sbr->k[0]; | |
| 373 |
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266 | for (k = 1; k <= sbr->n_master; k++) |
| 374 | 252 | sbr->f_master[k] += sbr->f_master[k - 1]; | |
| 375 | |||
| 376 | } else { | ||
| 377 | 51 | int half_bands = 7 - spectrum->bs_freq_scale; // bs_freq_scale = {1,2,3} | |
| 378 | int two_regions, num_bands_0; | ||
| 379 | int vdk0_max, vdk1_min; | ||
| 380 | int16_t vk0[49]; | ||
| 381 | #if USE_FIXED | ||
| 382 | 5 | int tmp, nz = 0; | |
| 383 | #endif /* USE_FIXED */ | ||
| 384 | |||
| 385 |
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51 | if (49 * sbr->k[2] > 110 * sbr->k[0]) { |
| 386 | 12 | two_regions = 1; | |
| 387 | 12 | sbr->k[1] = 2 * sbr->k[0]; | |
| 388 | } else { | ||
| 389 | 39 | two_regions = 0; | |
| 390 | 39 | sbr->k[1] = sbr->k[2]; | |
| 391 | } | ||
| 392 | |||
| 393 | #if USE_FIXED | ||
| 394 | 5 | tmp = (sbr->k[1] << 23) / sbr->k[0]; | |
| 395 |
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35 | while (tmp < 0x40000000) { |
| 396 | 30 | tmp <<= 1; | |
| 397 | 30 | nz++; | |
| 398 | } | ||
| 399 | 5 | tmp = fixed_log(tmp - 0x80000000); | |
| 400 | 5 | tmp = (int)(((int64_t)tmp * CONST_RECIP_LN2 + 0x20000000) >> 30); | |
| 401 | 5 | tmp = (((tmp + 0x80) >> 8) + ((8 - nz) << 23)) * half_bands; | |
| 402 | 5 | num_bands_0 = ((tmp + 0x400000) >> 23) * 2; | |
| 403 | #else | ||
| 404 | 46 | num_bands_0 = lrintf(half_bands * log2f(sbr->k[1] / (float)sbr->k[0])) * 2; | |
| 405 | #endif /* USE_FIXED */ | ||
| 406 | |||
| 407 |
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51 | if (num_bands_0 <= 0) { // Requirements (14496-3 sp04 p205) |
| 408 | ✗ | av_log(ac->avctx, AV_LOG_ERROR, "Invalid num_bands_0: %d\n", num_bands_0); | |
| 409 | ✗ | return -1; | |
| 410 | } | ||
| 411 | |||
| 412 | 51 | vk0[0] = 0; | |
| 413 | |||
| 414 | 51 | make_bands(vk0+1, sbr->k[0], sbr->k[1], num_bands_0); | |
| 415 | |||
| 416 |
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|
1172 | AV_QSORT(vk0 + 1, num_bands_0, int16_t, qsort_comparison_function_int16); |
| 417 | 51 | vdk0_max = vk0[num_bands_0]; | |
| 418 | |||
| 419 | 51 | vk0[0] = sbr->k[0]; | |
| 420 |
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611 | for (k = 1; k <= num_bands_0; k++) { |
| 421 |
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560 | if (vk0[k] <= 0) { // Requirements (14496-3 sp04 p205) |
| 422 | ✗ | av_log(ac->avctx, AV_LOG_ERROR, "Invalid vDk0[%d]: %d\n", k, vk0[k]); | |
| 423 | ✗ | return -1; | |
| 424 | } | ||
| 425 | 560 | vk0[k] += vk0[k-1]; | |
| 426 | } | ||
| 427 | |||
| 428 |
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51 | if (two_regions) { |
| 429 | int16_t vk1[49]; | ||
| 430 | #if USE_FIXED | ||
| 431 | int num_bands_1; | ||
| 432 | |||
| 433 | 2 | tmp = (sbr->k[2] << 23) / sbr->k[1]; | |
| 434 | 2 | nz = 0; | |
| 435 |
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16 | while (tmp < 0x40000000) { |
| 436 | 14 | tmp <<= 1; | |
| 437 | 14 | nz++; | |
| 438 | } | ||
| 439 | 2 | tmp = fixed_log(tmp - 0x80000000); | |
| 440 | 2 | tmp = (int)(((int64_t)tmp * CONST_RECIP_LN2 + 0x20000000) >> 30); | |
| 441 | 2 | tmp = (((tmp + 0x80) >> 8) + ((8 - nz) << 23)) * half_bands; | |
| 442 |
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2 | if (spectrum->bs_alter_scale) |
| 443 | 2 | tmp = (int)(((int64_t)tmp * CONST_076923 + 0x40000000) >> 31); | |
| 444 | 2 | num_bands_1 = ((tmp + 0x400000) >> 23) * 2; | |
| 445 | #else | ||
| 446 | 20 | float invwarp = spectrum->bs_alter_scale ? 0.76923076923076923077f | |
| 447 |
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10 | : 1.0f; // bs_alter_scale = {0,1} |
| 448 | 10 | int num_bands_1 = lrintf(half_bands * invwarp * | |
| 449 | 10 | log2f(sbr->k[2] / (float)sbr->k[1])) * 2; | |
| 450 | #endif /* USE_FIXED */ | ||
| 451 | 12 | make_bands(vk1+1, sbr->k[1], sbr->k[2], num_bands_1); | |
| 452 | |||
| 453 | 12 | vdk1_min = array_min_int16(vk1 + 1, num_bands_1); | |
| 454 | |||
| 455 |
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12 | if (vdk1_min < vdk0_max) { |
| 456 | int change; | ||
| 457 | ✗ | AV_QSORT(vk1 + 1, num_bands_1, int16_t, qsort_comparison_function_int16); | |
| 458 | ✗ | change = FFMIN(vdk0_max - vk1[1], (vk1[num_bands_1] - vk1[1]) >> 1); | |
| 459 | ✗ | vk1[1] += change; | |
| 460 | ✗ | vk1[num_bands_1] -= change; | |
| 461 | } | ||
| 462 | |||
| 463 |
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34 | AV_QSORT(vk1 + 1, num_bands_1, int16_t, qsort_comparison_function_int16); |
| 464 | |||
| 465 | 12 | vk1[0] = sbr->k[1]; | |
| 466 |
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40 | for (k = 1; k <= num_bands_1; k++) { |
| 467 |
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28 | if (vk1[k] <= 0) { // Requirements (14496-3 sp04 p205) |
| 468 | ✗ | av_log(ac->avctx, AV_LOG_ERROR, "Invalid vDk1[%d]: %d\n", k, vk1[k]); | |
| 469 | ✗ | return -1; | |
| 470 | } | ||
| 471 | 28 | vk1[k] += vk1[k-1]; | |
| 472 | } | ||
| 473 | |||
| 474 | 12 | sbr->n_master = num_bands_0 + num_bands_1; | |
| 475 |
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12 | if (check_n_master(ac->avctx, sbr->n_master, sbr->spectrum_params.bs_xover_band)) |
| 476 | ✗ | return -1; | |
| 477 | 12 | memcpy(&sbr->f_master[0], vk0, | |
| 478 | 12 | (num_bands_0 + 1) * sizeof(sbr->f_master[0])); | |
| 479 | 12 | memcpy(&sbr->f_master[num_bands_0 + 1], vk1 + 1, | |
| 480 | num_bands_1 * sizeof(sbr->f_master[0])); | ||
| 481 | |||
| 482 | } else { | ||
| 483 | 39 | sbr->n_master = num_bands_0; | |
| 484 |
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39 | if (check_n_master(ac->avctx, sbr->n_master, sbr->spectrum_params.bs_xover_band)) |
| 485 | ✗ | return -1; | |
| 486 | 39 | memcpy(sbr->f_master, vk0, (num_bands_0 + 1) * sizeof(sbr->f_master[0])); | |
| 487 | } | ||
| 488 | } | ||
| 489 | |||
| 490 | 65 | return 0; | |
| 491 | } | ||
| 492 | |||
| 493 | /// High Frequency Generation - Patch Construction (14496-3 sp04 p216 fig. 4.46) | ||
| 494 | 65 | static int sbr_hf_calc_npatches(AACDecContext *ac, SpectralBandReplication *sbr) | |
| 495 | { | ||
| 496 | 65 | int i, k, last_k = -1, last_msb = -1, sb = 0; | |
| 497 | 65 | int msb = sbr->k[0]; | |
| 498 | 65 | int usb = sbr->kx[1]; | |
| 499 | 65 | int goal_sb = ((1000 << 11) + (sbr->sample_rate >> 1)) / sbr->sample_rate; | |
| 500 | |||
| 501 | 65 | sbr->num_patches = 0; | |
| 502 | |||
| 503 |
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65 | if (goal_sb < sbr->kx[1] + sbr->m[1]) { |
| 504 |
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334 | for (k = 0; sbr->f_master[k] < goal_sb; k++) ; |
| 505 | } else | ||
| 506 | 34 | k = sbr->n_master; | |
| 507 | |||
| 508 | do { | ||
| 509 | 186 | int odd = 0; | |
| 510 |
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186 | if (k == last_k && msb == last_msb) { |
| 511 | ✗ | av_log(ac->avctx, AV_LOG_ERROR, "patch construction failed\n"); | |
| 512 | ✗ | return AVERROR_INVALIDDATA; | |
| 513 | } | ||
| 514 | 186 | last_k = k; | |
| 515 | 186 | last_msb = msb; | |
| 516 |
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1060 | for (i = k; i == k || sb > (sbr->k[0] - 1 + msb - odd); i--) { |
| 517 | 874 | sb = sbr->f_master[i]; | |
| 518 | 874 | odd = (sb + sbr->k[0]) & 1; | |
| 519 | } | ||
| 520 | |||
| 521 | // Requirements (14496-3 sp04 p205) sets the maximum number of patches to 5. | ||
| 522 | // After this check the final number of patches can still be six which is | ||
| 523 | // illegal however the Coding Technologies decoder check stream has a final | ||
| 524 | // count of 6 patches | ||
| 525 |
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186 | if (sbr->num_patches > 5) { |
| 526 | ✗ | av_log(ac->avctx, AV_LOG_ERROR, "Too many patches: %d\n", sbr->num_patches); | |
| 527 | ✗ | return -1; | |
| 528 | } | ||
| 529 | |||
| 530 | 186 | sbr->patch_num_subbands[sbr->num_patches] = FFMAX(sb - usb, 0); | |
| 531 | 186 | sbr->patch_start_subband[sbr->num_patches] = sbr->k[0] - odd - sbr->patch_num_subbands[sbr->num_patches]; | |
| 532 | |||
| 533 |
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186 | if (sbr->patch_num_subbands[sbr->num_patches] > 0) { |
| 534 | 186 | usb = sb; | |
| 535 | 186 | msb = sb; | |
| 536 | 186 | sbr->num_patches++; | |
| 537 | } else | ||
| 538 | ✗ | msb = sbr->kx[1]; | |
| 539 | |||
| 540 |
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186 | if (sbr->f_master[k] - sb < 3) |
| 541 | 86 | k = sbr->n_master; | |
| 542 |
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186 | } while (sb != sbr->kx[1] + sbr->m[1]); |
| 543 | |||
| 544 |
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65 | if (sbr->num_patches > 1 && |
| 545 |
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63 | sbr->patch_num_subbands[sbr->num_patches - 1] < 3) |
| 546 | ✗ | sbr->num_patches--; | |
| 547 | |||
| 548 | 65 | return 0; | |
| 549 | } | ||
| 550 | |||
| 551 | /// Derived Frequency Band Tables (14496-3 sp04 p197) | ||
| 552 | 65 | static int sbr_make_f_derived(AACDecContext *ac, SpectralBandReplication *sbr) | |
| 553 | { | ||
| 554 | int k, temp; | ||
| 555 | #if USE_FIXED | ||
| 556 | 5 | int nz = 0; | |
| 557 | #endif /* USE_FIXED */ | ||
| 558 | |||
| 559 | 65 | sbr->n[1] = sbr->n_master - sbr->spectrum_params.bs_xover_band; | |
| 560 | 65 | sbr->n[0] = (sbr->n[1] + 1) >> 1; | |
| 561 | |||
| 562 | 65 | memcpy(sbr->f_tablehigh, &sbr->f_master[sbr->spectrum_params.bs_xover_band], | |
| 563 | 65 | (sbr->n[1] + 1) * sizeof(sbr->f_master[0])); | |
| 564 | 65 | sbr->m[1] = sbr->f_tablehigh[sbr->n[1]] - sbr->f_tablehigh[0]; | |
| 565 | 65 | sbr->kx[1] = sbr->f_tablehigh[0]; | |
| 566 | |||
| 567 | // Requirements (14496-3 sp04 p205) | ||
| 568 |
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65 | if (sbr->kx[1] + sbr->m[1] > 64) { |
| 569 | ✗ | av_log(ac->avctx, AV_LOG_ERROR, | |
| 570 | ✗ | "Stop frequency border too high: %d\n", sbr->kx[1] + sbr->m[1]); | |
| 571 | ✗ | return -1; | |
| 572 | } | ||
| 573 |
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65 | if (sbr->kx[1] > 32) { |
| 574 | ✗ | av_log(ac->avctx, AV_LOG_ERROR, "Start frequency border too high: %d\n", sbr->kx[1]); | |
| 575 | ✗ | return -1; | |
| 576 | } | ||
| 577 | |||
| 578 | 65 | sbr->f_tablelow[0] = sbr->f_tablehigh[0]; | |
| 579 | 65 | temp = sbr->n[1] & 1; | |
| 580 |
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485 | for (k = 1; k <= sbr->n[0]; k++) |
| 581 | 420 | sbr->f_tablelow[k] = sbr->f_tablehigh[2 * k - temp]; | |
| 582 | #if USE_FIXED | ||
| 583 | 5 | temp = (sbr->k[2] << 23) / sbr->kx[1]; | |
| 584 |
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35 | while (temp < 0x40000000) { |
| 585 | 30 | temp <<= 1; | |
| 586 | 30 | nz++; | |
| 587 | } | ||
| 588 | 5 | temp = fixed_log(temp - 0x80000000); | |
| 589 | 5 | temp = (int)(((int64_t)temp * CONST_RECIP_LN2 + 0x20000000) >> 30); | |
| 590 | 5 | temp = (((temp + 0x80) >> 8) + ((8 - nz) << 23)) * sbr->spectrum_params.bs_noise_bands; | |
| 591 | |||
| 592 | 5 | sbr->n_q = (temp + 0x400000) >> 23; | |
| 593 |
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5 | if (sbr->n_q < 1) |
| 594 | ✗ | sbr->n_q = 1; | |
| 595 | #else | ||
| 596 | 60 | sbr->n_q = FFMAX(1, lrintf(sbr->spectrum_params.bs_noise_bands * | |
| 597 | log2f(sbr->k[2] / (float)sbr->kx[1]))); // 0 <= bs_noise_bands <= 3 | ||
| 598 | #endif /* USE_FIXED */ | ||
| 599 | |||
| 600 |
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65 | if (sbr->n_q > 5) { |
| 601 | ✗ | av_log(ac->avctx, AV_LOG_ERROR, "Too many noise floor scale factors: %d\n", sbr->n_q); | |
| 602 | ✗ | sbr->n_q = 1; | |
| 603 | ✗ | return -1; | |
| 604 | } | ||
| 605 | |||
| 606 | 65 | sbr->f_tablenoise[0] = sbr->f_tablelow[0]; | |
| 607 | 65 | temp = 0; | |
| 608 |
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266 | for (k = 1; k <= sbr->n_q; k++) { |
| 609 | 201 | temp += (sbr->n[0] - temp) / (sbr->n_q + 1 - k); | |
| 610 | 201 | sbr->f_tablenoise[k] = sbr->f_tablelow[temp]; | |
| 611 | } | ||
| 612 | |||
| 613 |
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65 | if (sbr_hf_calc_npatches(ac, sbr) < 0) |
| 614 | ✗ | return -1; | |
| 615 | |||
| 616 | 65 | sbr_make_f_tablelim(sbr); | |
| 617 | |||
| 618 | 65 | sbr->data[0].f_indexnoise = 0; | |
| 619 | 65 | sbr->data[1].f_indexnoise = 0; | |
| 620 | |||
| 621 | 65 | return 0; | |
| 622 | } | ||
| 623 | |||
| 624 | 22940 | static av_always_inline void get_bits1_vector(GetBitContext *gb, uint8_t *vec, | |
| 625 | int elements) | ||
| 626 | { | ||
| 627 | int i; | ||
| 628 |
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71495 | for (i = 0; i < elements; i++) { |
| 629 | 48555 | vec[i] = get_bits1(gb); | |
| 630 | } | ||
| 631 | 22940 | } | |
| 632 | |||
| 633 | /** ceil(log2(index+1)) */ | ||
| 634 | static const int8_t ceil_log2[] = { | ||
| 635 | 0, 1, 2, 2, 3, 3, | ||
| 636 | }; | ||
| 637 | |||
| 638 | 7793 | static int read_sbr_grid(AACDecContext *ac, SpectralBandReplication *sbr, | |
| 639 | GetBitContext *gb, SBRData *ch_data) | ||
| 640 | { | ||
| 641 | int i; | ||
| 642 | 7793 | int bs_pointer = 0; | |
| 643 | // frameLengthFlag ? 15 : 16; 960 sample length frames unsupported; this value is numTimeSlots | ||
| 644 | 7793 | int abs_bord_trail = 16; | |
| 645 | int num_rel_lead, num_rel_trail; | ||
| 646 | 7793 | unsigned bs_num_env_old = ch_data->bs_num_env; | |
| 647 | int bs_frame_class, bs_num_env; | ||
| 648 | |||
| 649 | 7793 | ch_data->bs_freq_res[0] = ch_data->bs_freq_res[ch_data->bs_num_env]; | |
| 650 | 7793 | ch_data->bs_amp_res = sbr->bs_amp_res_header; | |
| 651 | 7793 | ch_data->t_env_num_env_old = ch_data->t_env[bs_num_env_old]; | |
| 652 | |||
| 653 |
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|
7793 | switch (bs_frame_class = get_bits(gb, 2)) { |
| 654 | 6395 | case FIXFIX: | |
| 655 | 6395 | bs_num_env = 1 << get_bits(gb, 2); | |
| 656 |
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|
6395 | if (bs_num_env > (sbr->usac ? 8 : 5)) { |
| 657 | ✗ | av_log(ac->avctx, AV_LOG_ERROR, | |
| 658 | "Invalid bitstream, too many SBR envelopes in FIXFIX type SBR frame: %d\n", | ||
| 659 | bs_num_env); | ||
| 660 | ✗ | return -1; | |
| 661 | } | ||
| 662 | 6395 | ch_data->bs_num_env = bs_num_env; | |
| 663 | 6395 | num_rel_lead = ch_data->bs_num_env - 1; | |
| 664 |
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|
6395 | if (ch_data->bs_num_env == 1) |
| 665 | 4929 | ch_data->bs_amp_res = 0; | |
| 666 | |||
| 667 | |||
| 668 | 6395 | ch_data->t_env[0] = 0; | |
| 669 | 6395 | ch_data->t_env[ch_data->bs_num_env] = abs_bord_trail; | |
| 670 | |||
| 671 | 6395 | abs_bord_trail = (abs_bord_trail + (ch_data->bs_num_env >> 1)) / | |
| 672 | 6395 | ch_data->bs_num_env; | |
| 673 |
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|
7861 | for (i = 0; i < num_rel_lead; i++) |
| 674 | 1466 | ch_data->t_env[i + 1] = ch_data->t_env[i] + abs_bord_trail; | |
| 675 | |||
| 676 | 6395 | ch_data->bs_freq_res[1] = get_bits1(gb); | |
| 677 |
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|
7861 | for (i = 1; i < ch_data->bs_num_env; i++) |
| 678 | 1466 | ch_data->bs_freq_res[i + 1] = ch_data->bs_freq_res[1]; | |
| 679 | 6395 | break; | |
| 680 | 630 | case FIXVAR: | |
| 681 | 630 | abs_bord_trail += get_bits(gb, 2); | |
| 682 | 630 | num_rel_trail = get_bits(gb, 2); | |
| 683 | 630 | ch_data->bs_num_env = num_rel_trail + 1; | |
| 684 | 630 | ch_data->t_env[0] = 0; | |
| 685 | 630 | ch_data->t_env[ch_data->bs_num_env] = abs_bord_trail; | |
| 686 | |||
| 687 |
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|
1992 | for (i = 0; i < num_rel_trail; i++) |
| 688 | 1362 | ch_data->t_env[ch_data->bs_num_env - 1 - i] = | |
| 689 | 1362 | ch_data->t_env[ch_data->bs_num_env - i] - 2 * get_bits(gb, 2) - 2; | |
| 690 | |||
| 691 | 630 | bs_pointer = get_bits(gb, ceil_log2[ch_data->bs_num_env]); | |
| 692 | |||
| 693 |
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|
2622 | for (i = 0; i < ch_data->bs_num_env; i++) |
| 694 | 1992 | ch_data->bs_freq_res[ch_data->bs_num_env - i] = get_bits1(gb); | |
| 695 | 630 | break; | |
| 696 | 620 | case VARFIX: | |
| 697 | 620 | ch_data->t_env[0] = get_bits(gb, 2); | |
| 698 | 620 | num_rel_lead = get_bits(gb, 2); | |
| 699 | 620 | ch_data->bs_num_env = num_rel_lead + 1; | |
| 700 | 620 | ch_data->t_env[ch_data->bs_num_env] = abs_bord_trail; | |
| 701 | |||
| 702 |
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|
1396 | for (i = 0; i < num_rel_lead; i++) |
| 703 | 776 | ch_data->t_env[i + 1] = ch_data->t_env[i] + 2 * get_bits(gb, 2) + 2; | |
| 704 | |||
| 705 | 620 | bs_pointer = get_bits(gb, ceil_log2[ch_data->bs_num_env]); | |
| 706 | |||
| 707 | 620 | get_bits1_vector(gb, ch_data->bs_freq_res + 1, ch_data->bs_num_env); | |
| 708 | 620 | break; | |
| 709 | 148 | case VARVAR: | |
| 710 | 148 | ch_data->t_env[0] = get_bits(gb, 2); | |
| 711 | 148 | abs_bord_trail += get_bits(gb, 2); | |
| 712 | 148 | num_rel_lead = get_bits(gb, 2); | |
| 713 | 148 | num_rel_trail = get_bits(gb, 2); | |
| 714 | 148 | bs_num_env = num_rel_lead + num_rel_trail + 1; | |
| 715 | |||
| 716 |
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|
148 | if (bs_num_env > 5) { |
| 717 | ✗ | av_log(ac->avctx, AV_LOG_ERROR, | |
| 718 | "Invalid bitstream, too many SBR envelopes in VARVAR type SBR frame: %d\n", | ||
| 719 | bs_num_env); | ||
| 720 | ✗ | return -1; | |
| 721 | } | ||
| 722 | 148 | ch_data->bs_num_env = bs_num_env; | |
| 723 | |||
| 724 | 148 | ch_data->t_env[ch_data->bs_num_env] = abs_bord_trail; | |
| 725 | |||
| 726 |
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|
220 | for (i = 0; i < num_rel_lead; i++) |
| 727 | 72 | ch_data->t_env[i + 1] = ch_data->t_env[i] + 2 * get_bits(gb, 2) + 2; | |
| 728 |
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439 | for (i = 0; i < num_rel_trail; i++) |
| 729 | 291 | ch_data->t_env[ch_data->bs_num_env - 1 - i] = | |
| 730 | 291 | ch_data->t_env[ch_data->bs_num_env - i] - 2 * get_bits(gb, 2) - 2; | |
| 731 | |||
| 732 | 148 | bs_pointer = get_bits(gb, ceil_log2[ch_data->bs_num_env]); | |
| 733 | |||
| 734 | 148 | get_bits1_vector(gb, ch_data->bs_freq_res + 1, ch_data->bs_num_env); | |
| 735 | 148 | break; | |
| 736 | } | ||
| 737 | 7793 | ch_data->bs_frame_class = bs_frame_class; | |
| 738 | |||
| 739 |
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|
7793 | av_assert0(bs_pointer >= 0); |
| 740 |
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7793 | if (bs_pointer > ch_data->bs_num_env + 1) { |
| 741 | ✗ | av_log(ac->avctx, AV_LOG_ERROR, | |
| 742 | "Invalid bitstream, bs_pointer points to a middle noise border outside the time borders table: %d\n", | ||
| 743 | bs_pointer); | ||
| 744 | ✗ | return -1; | |
| 745 | } | ||
| 746 | |||
| 747 |
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|
19553 | for (i = 1; i <= ch_data->bs_num_env; i++) { |
| 748 |
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11760 | if (ch_data->t_env[i-1] >= ch_data->t_env[i]) { |
| 749 | ✗ | av_log(ac->avctx, AV_LOG_ERROR, "Not strictly monotone time borders\n"); | |
| 750 | ✗ | return -1; | |
| 751 | } | ||
| 752 | } | ||
| 753 | |||
| 754 |
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7793 | ch_data->bs_num_noise = (ch_data->bs_num_env > 1) + 1; |
| 755 | |||
| 756 | 7793 | ch_data->t_q[0] = ch_data->t_env[0]; | |
| 757 | 7793 | ch_data->t_q[ch_data->bs_num_noise] = ch_data->t_env[ch_data->bs_num_env]; | |
| 758 |
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7793 | if (ch_data->bs_num_noise > 1) { |
| 759 | int idx; | ||
| 760 |
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2864 | if (ch_data->bs_frame_class == FIXFIX) { |
| 761 | 1466 | idx = ch_data->bs_num_env >> 1; | |
| 762 |
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|
1398 | } else if (ch_data->bs_frame_class & 1) { // FIXVAR or VARVAR |
| 763 |
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|
778 | idx = ch_data->bs_num_env - FFMAX(bs_pointer - 1, 1); |
| 764 | } else { // VARFIX | ||
| 765 |
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|
620 | if (!bs_pointer) |
| 766 | 464 | idx = 1; | |
| 767 |
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156 | else if (bs_pointer == 1) |
| 768 | 156 | idx = ch_data->bs_num_env - 1; | |
| 769 | else // bs_pointer > 1 | ||
| 770 | ✗ | idx = bs_pointer - 1; | |
| 771 | } | ||
| 772 | 2864 | ch_data->t_q[1] = ch_data->t_env[idx]; | |
| 773 | } | ||
| 774 | |||
| 775 | 7793 | ch_data->e_a[0] = -(ch_data->e_a[1] != bs_num_env_old); // l_APrev | |
| 776 | 7793 | ch_data->e_a[1] = -1; | |
| 777 |
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7793 | if ((ch_data->bs_frame_class & 1) && bs_pointer) { // FIXVAR or VARVAR and bs_pointer != 0 |
| 778 | 778 | ch_data->e_a[1] = ch_data->bs_num_env + 1 - bs_pointer; | |
| 779 |
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7015 | } else if ((ch_data->bs_frame_class == 2) && (bs_pointer > 1)) // VARFIX and bs_pointer > 1 |
| 780 | ✗ | ch_data->e_a[1] = bs_pointer - 1; | |
| 781 | |||
| 782 | 7793 | return 0; | |
| 783 | } | ||
| 784 | |||
| 785 | 2625 | static void copy_sbr_grid(SBRData *dst, const SBRData *src) { | |
| 786 | //These variables are saved from the previous frame rather than copied | ||
| 787 | 2625 | dst->bs_freq_res[0] = dst->bs_freq_res[dst->bs_num_env]; | |
| 788 | 2625 | dst->t_env_num_env_old = dst->t_env[dst->bs_num_env]; | |
| 789 | 2625 | dst->e_a[0] = -(dst->e_a[1] != dst->bs_num_env); | |
| 790 | |||
| 791 | //These variables are read from the bitstream and therefore copied | ||
| 792 | 2625 | memcpy(dst->bs_freq_res+1, src->bs_freq_res+1, sizeof(dst->bs_freq_res)-sizeof(*dst->bs_freq_res)); | |
| 793 | 2625 | memcpy(dst->t_env, src->t_env, sizeof(dst->t_env)); | |
| 794 | 2625 | memcpy(dst->t_q, src->t_q, sizeof(dst->t_q)); | |
| 795 | 2625 | dst->bs_num_env = src->bs_num_env; | |
| 796 | 2625 | dst->bs_amp_res = src->bs_amp_res; | |
| 797 | 2625 | dst->bs_num_noise = src->bs_num_noise; | |
| 798 | 2625 | dst->bs_frame_class = src->bs_frame_class; | |
| 799 | 2625 | dst->e_a[1] = src->e_a[1]; | |
| 800 | 2625 | } | |
| 801 | |||
| 802 | /// Read how the envelope and noise floor data is delta coded | ||
| 803 | 10418 | static void read_sbr_dtdf(SpectralBandReplication *sbr, GetBitContext *gb, | |
| 804 | SBRData *ch_data, int indep_flag) | ||
| 805 | { | ||
| 806 |
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10418 | if (sbr->usac) { |
| 807 | ✗ | if (indep_flag) { | |
| 808 | ✗ | ch_data->bs_df_env[0] = 0; | |
| 809 | ✗ | get_bits1_vector(gb, &ch_data->bs_df_env[1], ch_data->bs_num_env - 1); | |
| 810 | } else { | ||
| 811 | ✗ | get_bits1_vector(gb, ch_data->bs_df_env, ch_data->bs_num_env); | |
| 812 | } | ||
| 813 | |||
| 814 | ✗ | if (indep_flag) { | |
| 815 | ✗ | ch_data->bs_df_noise[0] = 0; | |
| 816 | ✗ | get_bits1_vector(gb, &ch_data->bs_df_noise[1], ch_data->bs_num_noise - 1); | |
| 817 | } else { | ||
| 818 | ✗ | get_bits1_vector(gb, ch_data->bs_df_noise, ch_data->bs_num_noise); | |
| 819 | } | ||
| 820 | } else { | ||
| 821 | 10418 | get_bits1_vector(gb, ch_data->bs_df_env, ch_data->bs_num_env); | |
| 822 | 10418 | get_bits1_vector(gb, ch_data->bs_df_noise, ch_data->bs_num_noise); | |
| 823 | } | ||
| 824 | 10418 | } | |
| 825 | |||
| 826 | /// Read inverse filtering data | ||
| 827 | 7793 | static void read_sbr_invf(SpectralBandReplication *sbr, GetBitContext *gb, | |
| 828 | SBRData *ch_data) | ||
| 829 | { | ||
| 830 | int i; | ||
| 831 | |||
| 832 | 7793 | memcpy(ch_data->bs_invf_mode[1], ch_data->bs_invf_mode[0], 5 * sizeof(uint8_t)); | |
| 833 |
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31778 | for (i = 0; i < sbr->n_q; i++) |
| 834 | 23985 | ch_data->bs_invf_mode[0][i] = get_bits(gb, 2); | |
| 835 | 7793 | } | |
| 836 | |||
| 837 | 10418 | static int read_sbr_envelope(AACDecContext *ac, SpectralBandReplication *sbr, GetBitContext *gb, | |
| 838 | SBRData *ch_data, int ch) | ||
| 839 | { | ||
| 840 | int bits; | ||
| 841 | int i, j, k; | ||
| 842 | const VLCElem *t_huff, *f_huff; | ||
| 843 |
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10418 | const int delta = (ch == 1 && sbr->bs_coupling == 1) + 1; |
| 844 | 10418 | const int odd = sbr->n[1] & 1; | |
| 845 | |||
| 846 |
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10418 | if (sbr->bs_coupling && ch) { |
| 847 |
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2625 | if (ch_data->bs_amp_res) { |
| 848 | 582 | bits = 5; | |
| 849 | 582 | t_huff = ff_aac_sbr_vlc[T_HUFFMAN_ENV_BAL_3_0DB]; | |
| 850 | 582 | f_huff = ff_aac_sbr_vlc[F_HUFFMAN_ENV_BAL_3_0DB]; | |
| 851 | } else { | ||
| 852 | 2043 | bits = 6; | |
| 853 | 2043 | t_huff = ff_aac_sbr_vlc[T_HUFFMAN_ENV_BAL_1_5DB]; | |
| 854 | 2043 | f_huff = ff_aac_sbr_vlc[F_HUFFMAN_ENV_BAL_1_5DB]; | |
| 855 | } | ||
| 856 | } else { | ||
| 857 |
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7793 | if (ch_data->bs_amp_res) { |
| 858 | 2864 | bits = 6; | |
| 859 | 2864 | t_huff = ff_aac_sbr_vlc[T_HUFFMAN_ENV_3_0DB]; | |
| 860 | 2864 | f_huff = ff_aac_sbr_vlc[F_HUFFMAN_ENV_3_0DB]; | |
| 861 | } else { | ||
| 862 | 4929 | bits = 7; | |
| 863 | 4929 | t_huff = ff_aac_sbr_vlc[T_HUFFMAN_ENV_1_5DB]; | |
| 864 | 4929 | f_huff = ff_aac_sbr_vlc[F_HUFFMAN_ENV_1_5DB]; | |
| 865 | } | ||
| 866 | } | ||
| 867 | |||
| 868 |
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25578 | for (i = 0; i < ch_data->bs_num_env; i++) { |
| 869 |
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15160 | if (ch_data->bs_df_env[i]) { |
| 870 | // bs_freq_res[0] == bs_freq_res[bs_num_env] from prev frame | ||
| 871 |
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4947 | if (ch_data->bs_freq_res[i + 1] == ch_data->bs_freq_res[i]) { |
| 872 |
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55736 | for (j = 0; j < sbr->n[ch_data->bs_freq_res[i + 1]]; j++) { |
| 873 | 51282 | ch_data->env_facs_q[i + 1][j] = ch_data->env_facs_q[i][j] + delta * get_vlc2(gb, t_huff, 9, 3); | |
| 874 |
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51282 | if (ch_data->env_facs_q[i + 1][j] > 127U) { |
| 875 | ✗ | av_log(ac->avctx, AV_LOG_ERROR, "env_facs_q %d is invalid\n", ch_data->env_facs_q[i + 1][j]); | |
| 876 | ✗ | return AVERROR_INVALIDDATA; | |
| 877 | } | ||
| 878 | } | ||
| 879 |
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493 | } else if (ch_data->bs_freq_res[i + 1]) { |
| 880 |
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4655 | for (j = 0; j < sbr->n[ch_data->bs_freq_res[i + 1]]; j++) { |
| 881 | 4282 | k = (j + odd) >> 1; // find k such that f_tablelow[k] <= f_tablehigh[j] < f_tablelow[k + 1] | |
| 882 | 4282 | ch_data->env_facs_q[i + 1][j] = ch_data->env_facs_q[i][k] + delta * get_vlc2(gb, t_huff, 9, 3); | |
| 883 |
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4282 | if (ch_data->env_facs_q[i + 1][j] > 127U) { |
| 884 | ✗ | av_log(ac->avctx, AV_LOG_ERROR, "env_facs_q %d is invalid\n", ch_data->env_facs_q[i + 1][j]); | |
| 885 | ✗ | return AVERROR_INVALIDDATA; | |
| 886 | } | ||
| 887 | } | ||
| 888 | } else { | ||
| 889 |
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799 | for (j = 0; j < sbr->n[ch_data->bs_freq_res[i + 1]]; j++) { |
| 890 |
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679 | k = j ? 2*j - odd : 0; // find k such that f_tablehigh[k] == f_tablelow[j] |
| 891 | 679 | ch_data->env_facs_q[i + 1][j] = ch_data->env_facs_q[i][k] + delta * get_vlc2(gb, t_huff, 9, 3); | |
| 892 |
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679 | if (ch_data->env_facs_q[i + 1][j] > 127U) { |
| 893 | ✗ | av_log(ac->avctx, AV_LOG_ERROR, "env_facs_q %d is invalid\n", ch_data->env_facs_q[i + 1][j]); | |
| 894 | ✗ | return AVERROR_INVALIDDATA; | |
| 895 | } | ||
| 896 | } | ||
| 897 | } | ||
| 898 | } else { | ||
| 899 | 10213 | ch_data->env_facs_q[i + 1][0] = delta * get_bits(gb, bits); // bs_env_start_value_balance | |
| 900 |
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115673 | for (j = 1; j < sbr->n[ch_data->bs_freq_res[i + 1]]; j++) { |
| 901 | 105460 | ch_data->env_facs_q[i + 1][j] = ch_data->env_facs_q[i + 1][j - 1] + delta * get_vlc2(gb, f_huff, 9, 3); | |
| 902 |
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105460 | if (ch_data->env_facs_q[i + 1][j] > 127U) { |
| 903 | ✗ | av_log(ac->avctx, AV_LOG_ERROR, "env_facs_q %d is invalid\n", ch_data->env_facs_q[i + 1][j]); | |
| 904 | ✗ | return AVERROR_INVALIDDATA; | |
| 905 | } | ||
| 906 | } | ||
| 907 | } | ||
| 908 |
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15160 | if (sbr->usac) { |
| 909 | ✗ | if (sbr->inter_tes) { | |
| 910 | ✗ | ch_data->temp_shape[i] = get_bits(gb, 1); | |
| 911 | ✗ | if (ch_data->temp_shape[i]) | |
| 912 | ✗ | ch_data->temp_shape_mode[i] = get_bits(gb, 2); | |
| 913 | } | ||
| 914 | } | ||
| 915 | } | ||
| 916 | |||
| 917 | //assign 0th elements of env_facs_q from last elements | ||
| 918 | 10418 | memcpy(ch_data->env_facs_q[0], ch_data->env_facs_q[ch_data->bs_num_env], | |
| 919 | sizeof(ch_data->env_facs_q[0])); | ||
| 920 | |||
| 921 | 10418 | return 0; | |
| 922 | } | ||
| 923 | |||
| 924 | 10418 | static int read_sbr_noise(AACDecContext *ac, SpectralBandReplication *sbr, GetBitContext *gb, | |
| 925 | SBRData *ch_data, int ch) | ||
| 926 | { | ||
| 927 | int i, j; | ||
| 928 | const VLCElem *t_huff, *f_huff; | ||
| 929 |
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|
10418 | int delta = (ch == 1 && sbr->bs_coupling == 1) + 1; |
| 930 | |||
| 931 |
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|
10418 | if (sbr->bs_coupling && ch) { |
| 932 | 2625 | t_huff = ff_aac_sbr_vlc[T_HUFFMAN_NOISE_BAL_3_0DB]; | |
| 933 | 2625 | f_huff = ff_aac_sbr_vlc[F_HUFFMAN_ENV_BAL_3_0DB]; | |
| 934 | } else { | ||
| 935 | 7793 | t_huff = ff_aac_sbr_vlc[T_HUFFMAN_NOISE_3_0DB]; | |
| 936 | 7793 | f_huff = ff_aac_sbr_vlc[F_HUFFMAN_ENV_3_0DB]; | |
| 937 | } | ||
| 938 | |||
| 939 |
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|
24282 | for (i = 0; i < ch_data->bs_num_noise; i++) { |
| 940 |
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|
13864 | if (ch_data->bs_df_noise[i]) { |
| 941 |
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|
43693 | for (j = 0; j < sbr->n_q; j++) { |
| 942 | 32863 | ch_data->noise_facs_q[i + 1][j] = ch_data->noise_facs_q[i][j] + delta * get_vlc2(gb, t_huff, 9, 2); | |
| 943 |
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|
32863 | if (ch_data->noise_facs_q[i + 1][j] > 30U) { |
| 944 | ✗ | av_log(ac->avctx, AV_LOG_ERROR, "noise_facs_q %d is invalid\n", ch_data->noise_facs_q[i + 1][j]); | |
| 945 | ✗ | return AVERROR_INVALIDDATA; | |
| 946 | } | ||
| 947 | } | ||
| 948 | } else { | ||
| 949 | 3034 | ch_data->noise_facs_q[i + 1][0] = delta * get_bits(gb, 5); // bs_noise_start_value_balance or bs_noise_start_value_level | |
| 950 |
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|
8944 | for (j = 1; j < sbr->n_q; j++) { |
| 951 | 5910 | ch_data->noise_facs_q[i + 1][j] = ch_data->noise_facs_q[i + 1][j - 1] + delta * get_vlc2(gb, f_huff, 9, 3); | |
| 952 |
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5910 | if (ch_data->noise_facs_q[i + 1][j] > 30U) { |
| 953 | ✗ | av_log(ac->avctx, AV_LOG_ERROR, "noise_facs_q %d is invalid\n", ch_data->noise_facs_q[i + 1][j]); | |
| 954 | ✗ | return AVERROR_INVALIDDATA; | |
| 955 | } | ||
| 956 | } | ||
| 957 | } | ||
| 958 | } | ||
| 959 | |||
| 960 | //assign 0th elements of noise_facs_q from last elements | ||
| 961 | 10418 | memcpy(ch_data->noise_facs_q[0], ch_data->noise_facs_q[ch_data->bs_num_noise], | |
| 962 | sizeof(ch_data->noise_facs_q[0])); | ||
| 963 | 10418 | return 0; | |
| 964 | } | ||
| 965 | |||
| 966 | 1616 | static void read_sbr_extension(AACDecContext *ac, SpectralBandReplication *sbr, | |
| 967 | GetBitContext *gb, | ||
| 968 | int bs_extension_id, int *num_bits_left) | ||
| 969 | { | ||
| 970 |
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1616 | switch (bs_extension_id) { |
| 971 | 1616 | case EXTENSION_ID_PS: | |
| 972 |
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1616 | if (!ac->oc[1].m4ac.ps) { |
| 973 | ✗ | av_log(ac->avctx, AV_LOG_ERROR, "Parametric Stereo signaled to be not-present but was found in the bitstream.\n"); | |
| 974 | ✗ | skip_bits_long(gb, *num_bits_left); // bs_fill_bits | |
| 975 | ✗ | *num_bits_left = 0; | |
| 976 | } else { | ||
| 977 | 1616 | *num_bits_left -= ff_ps_read_data(ac->avctx, gb, &sbr->ps.common, *num_bits_left); | |
| 978 | 1616 | ac->avctx->profile = AV_PROFILE_AAC_HE_V2; | |
| 979 | // ensure the warning is not printed if PS extension is present | ||
| 980 | 1616 | ac->warned_he_aac_mono = 1; | |
| 981 | } | ||
| 982 | 1616 | break; | |
| 983 | ✗ | default: | |
| 984 | // some files contain 0-padding | ||
| 985 | ✗ | if (bs_extension_id || *num_bits_left > 16 || show_bits(gb, *num_bits_left)) | |
| 986 | ✗ | avpriv_request_sample(ac->avctx, "Reserved SBR extensions"); | |
| 987 | ✗ | skip_bits_long(gb, *num_bits_left); // bs_fill_bits | |
| 988 | ✗ | *num_bits_left = 0; | |
| 989 | ✗ | break; | |
| 990 | } | ||
| 991 | 1616 | } | |
| 992 | |||
| 993 | 2646 | static int read_sbr_single_channel_element(AACDecContext *ac, | |
| 994 | SpectralBandReplication *sbr, | ||
| 995 | GetBitContext *gb) | ||
| 996 | { | ||
| 997 | int ret; | ||
| 998 | |||
| 999 |
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|
2646 | if (get_bits1(gb)) // bs_data_extra |
| 1000 | ✗ | skip_bits(gb, 4); // bs_reserved | |
| 1001 | |||
| 1002 |
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|
2646 | if (read_sbr_grid(ac, sbr, gb, &sbr->data[0])) |
| 1003 | ✗ | return -1; | |
| 1004 | 2646 | read_sbr_dtdf(sbr, gb, &sbr->data[0], 0); | |
| 1005 | 2646 | read_sbr_invf(sbr, gb, &sbr->data[0]); | |
| 1006 |
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|
2646 | if((ret = read_sbr_envelope(ac, sbr, gb, &sbr->data[0], 0)) < 0) |
| 1007 | ✗ | return ret; | |
| 1008 |
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|
2646 | if((ret = read_sbr_noise(ac, sbr, gb, &sbr->data[0], 0)) < 0) |
| 1009 | ✗ | return ret; | |
| 1010 | |||
| 1011 |
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|
2646 | if ((sbr->data[0].bs_add_harmonic_flag = get_bits1(gb))) |
| 1012 | 174 | get_bits1_vector(gb, sbr->data[0].bs_add_harmonic, sbr->n[1]); | |
| 1013 | |||
| 1014 | 2646 | return 0; | |
| 1015 | } | ||
| 1016 | |||
| 1017 | 3886 | static int read_sbr_channel_pair_element(AACDecContext *ac, | |
| 1018 | SpectralBandReplication *sbr, | ||
| 1019 | GetBitContext *gb) | ||
| 1020 | { | ||
| 1021 | int ret; | ||
| 1022 | |||
| 1023 |
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|
3886 | if (get_bits1(gb)) // bs_data_extra |
| 1024 | ✗ | skip_bits(gb, 8); // bs_reserved | |
| 1025 | |||
| 1026 |
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3886 | if ((sbr->bs_coupling = get_bits1(gb))) { |
| 1027 |
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|
2625 | if (read_sbr_grid(ac, sbr, gb, &sbr->data[0])) |
| 1028 | ✗ | return -1; | |
| 1029 | 2625 | copy_sbr_grid(&sbr->data[1], &sbr->data[0]); | |
| 1030 | 2625 | read_sbr_dtdf(sbr, gb, &sbr->data[0], 0); | |
| 1031 | 2625 | read_sbr_dtdf(sbr, gb, &sbr->data[1], 0); | |
| 1032 | 2625 | read_sbr_invf(sbr, gb, &sbr->data[0]); | |
| 1033 | 2625 | memcpy(sbr->data[1].bs_invf_mode[1], sbr->data[1].bs_invf_mode[0], sizeof(sbr->data[1].bs_invf_mode[0])); | |
| 1034 | 2625 | memcpy(sbr->data[1].bs_invf_mode[0], sbr->data[0].bs_invf_mode[0], sizeof(sbr->data[1].bs_invf_mode[0])); | |
| 1035 |
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2625 | if((ret = read_sbr_envelope(ac, sbr, gb, &sbr->data[0], 0)) < 0) |
| 1036 | ✗ | return ret; | |
| 1037 |
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|
2625 | if((ret = read_sbr_noise(ac, sbr, gb, &sbr->data[0], 0)) < 0) |
| 1038 | ✗ | return ret; | |
| 1039 |
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|
2625 | if((ret = read_sbr_envelope(ac, sbr, gb, &sbr->data[1], 1)) < 0) |
| 1040 | ✗ | return ret; | |
| 1041 |
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|
2625 | if((ret = read_sbr_noise(ac, sbr, gb, &sbr->data[1], 1)) < 0) |
| 1042 | ✗ | return ret; | |
| 1043 | } else { | ||
| 1044 |
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2522 | if (read_sbr_grid(ac, sbr, gb, &sbr->data[0]) || |
| 1045 | 1261 | read_sbr_grid(ac, sbr, gb, &sbr->data[1])) | |
| 1046 | ✗ | return -1; | |
| 1047 | 1261 | read_sbr_dtdf(sbr, gb, &sbr->data[0], 0); | |
| 1048 | 1261 | read_sbr_dtdf(sbr, gb, &sbr->data[1], 0); | |
| 1049 | 1261 | read_sbr_invf(sbr, gb, &sbr->data[0]); | |
| 1050 | 1261 | read_sbr_invf(sbr, gb, &sbr->data[1]); | |
| 1051 |
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1261 | if((ret = read_sbr_envelope(ac, sbr, gb, &sbr->data[0], 0)) < 0) |
| 1052 | ✗ | return ret; | |
| 1053 |
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1261 | if((ret = read_sbr_envelope(ac, sbr, gb, &sbr->data[1], 1)) < 0) |
| 1054 | ✗ | return ret; | |
| 1055 |
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1261 | if((ret = read_sbr_noise(ac, sbr, gb, &sbr->data[0], 0)) < 0) |
| 1056 | ✗ | return ret; | |
| 1057 |
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|
1261 | if((ret = read_sbr_noise(ac, sbr, gb, &sbr->data[1], 1)) < 0) |
| 1058 | ✗ | return ret; | |
| 1059 | } | ||
| 1060 | |||
| 1061 |
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|
3886 | if ((sbr->data[0].bs_add_harmonic_flag = get_bits1(gb))) |
| 1062 | 698 | get_bits1_vector(gb, sbr->data[0].bs_add_harmonic, sbr->n[1]); | |
| 1063 |
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3886 | if ((sbr->data[1].bs_add_harmonic_flag = get_bits1(gb))) |
| 1064 | 464 | get_bits1_vector(gb, sbr->data[1].bs_add_harmonic, sbr->n[1]); | |
| 1065 | |||
| 1066 | 3886 | return 0; | |
| 1067 | } | ||
| 1068 | |||
| 1069 | 6532 | static unsigned int read_sbr_data(AACDecContext *ac, SpectralBandReplication *sbr, | |
| 1070 | GetBitContext *gb, int id_aac) | ||
| 1071 | { | ||
| 1072 | 6532 | unsigned int cnt = get_bits_count(gb); | |
| 1073 | |||
| 1074 | 6532 | sbr->id_aac = id_aac; | |
| 1075 | 6532 | sbr->ready_for_dequant = 1; | |
| 1076 | |||
| 1077 |
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6532 | if (id_aac == TYPE_SCE || id_aac == TYPE_CCE) { |
| 1078 |
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|
2646 | if (read_sbr_single_channel_element(ac, sbr, gb)) { |
| 1079 | ✗ | sbr_turnoff(sbr); | |
| 1080 | ✗ | return get_bits_count(gb) - cnt; | |
| 1081 | } | ||
| 1082 |
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3886 | } else if (id_aac == TYPE_CPE) { |
| 1083 |
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|
3886 | if (read_sbr_channel_pair_element(ac, sbr, gb)) { |
| 1084 | ✗ | sbr_turnoff(sbr); | |
| 1085 | ✗ | return get_bits_count(gb) - cnt; | |
| 1086 | } | ||
| 1087 | } else { | ||
| 1088 | ✗ | av_log(ac->avctx, AV_LOG_ERROR, | |
| 1089 | "Invalid bitstream - cannot apply SBR to element type %d\n", id_aac); | ||
| 1090 | ✗ | sbr_turnoff(sbr); | |
| 1091 | ✗ | return get_bits_count(gb) - cnt; | |
| 1092 | } | ||
| 1093 |
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6532 | if (get_bits1(gb)) { // bs_extended_data |
| 1094 | 1616 | int num_bits_left = get_bits(gb, 4); // bs_extension_size | |
| 1095 |
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1616 | if (num_bits_left == 15) |
| 1096 | 258 | num_bits_left += get_bits(gb, 8); // bs_esc_count | |
| 1097 | |||
| 1098 | 1616 | num_bits_left <<= 3; | |
| 1099 |
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3232 | while (num_bits_left > 7) { |
| 1100 | 1616 | num_bits_left -= 2; | |
| 1101 | 1616 | read_sbr_extension(ac, sbr, gb, get_bits(gb, 2), &num_bits_left); // bs_extension_id | |
| 1102 | } | ||
| 1103 |
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1616 | if (num_bits_left < 0) { |
| 1104 | ✗ | av_log(ac->avctx, AV_LOG_ERROR, "SBR Extension over read.\n"); | |
| 1105 | } | ||
| 1106 |
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1616 | if (num_bits_left > 0) |
| 1107 | 1451 | skip_bits(gb, num_bits_left); | |
| 1108 | } | ||
| 1109 | |||
| 1110 | 6532 | return get_bits_count(gb) - cnt; | |
| 1111 | } | ||
| 1112 | |||
| 1113 | 65 | static void sbr_reset(AACDecContext *ac, SpectralBandReplication *sbr) | |
| 1114 | { | ||
| 1115 | int err; | ||
| 1116 | 65 | err = sbr_make_f_master(ac, sbr, &sbr->spectrum_params); | |
| 1117 |
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65 | if (err >= 0) |
| 1118 | 65 | err = sbr_make_f_derived(ac, sbr); | |
| 1119 |
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65 | if (err < 0) { |
| 1120 | ✗ | av_log(ac->avctx, AV_LOG_ERROR, | |
| 1121 | "SBR reset failed. Switching SBR to pure upsampling mode.\n"); | ||
| 1122 | ✗ | sbr_turnoff(sbr); | |
| 1123 | } | ||
| 1124 | 65 | } | |
| 1125 | |||
| 1126 | /** | ||
| 1127 | * Decode Spectral Band Replication extension data; reference: table 4.55. | ||
| 1128 | * | ||
| 1129 | * @param crc flag indicating the presence of CRC checksum | ||
| 1130 | * @param cnt length of TYPE_FIL syntactic element in bytes | ||
| 1131 | * | ||
| 1132 | * @return Returns number of bytes consumed from the TYPE_FIL element. | ||
| 1133 | */ | ||
| 1134 | 10901 | int AAC_RENAME(ff_aac_sbr_decode_extension)(AACDecContext *ac, ChannelElement *che, | |
| 1135 | GetBitContext *gb_host, int crc, | ||
| 1136 | int cnt, int id_aac) | ||
| 1137 | { | ||
| 1138 | 10901 | SpectralBandReplication *sbr = get_sbr(che); | |
| 1139 | 10901 | unsigned int num_sbr_bits = 0, num_align_bits; | |
| 1140 | unsigned bytes_read; | ||
| 1141 | 10901 | GetBitContext gbc = *gb_host, *gb = &gbc; | |
| 1142 | 10901 | skip_bits_long(gb_host, cnt*8 - 4); | |
| 1143 | |||
| 1144 | 10901 | sbr->reset = 0; | |
| 1145 | |||
| 1146 |
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10901 | if (!sbr->sample_rate) |
| 1147 | 82 | sbr->sample_rate = 2 * ac->oc[1].m4ac.sample_rate; //TODO use the nominal sample rate for arbitrary sample rate support | |
| 1148 |
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10901 | if (!ac->oc[1].m4ac.ext_sample_rate) |
| 1149 | 18 | ac->oc[1].m4ac.ext_sample_rate = 2 * ac->oc[1].m4ac.sample_rate; | |
| 1150 | |||
| 1151 |
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10901 | if (crc) { |
| 1152 | ✗ | skip_bits(gb, 10); // bs_sbr_crc_bits; TODO - implement CRC check | |
| 1153 | ✗ | num_sbr_bits += 10; | |
| 1154 | } | ||
| 1155 | |||
| 1156 | //Save some state from the previous frame. | ||
| 1157 | 10901 | sbr->kx[0] = sbr->kx[1]; | |
| 1158 | 10901 | sbr->m[0] = sbr->m[1]; | |
| 1159 | 10901 | sbr->kx_and_m_pushed = 1; | |
| 1160 | |||
| 1161 | 10901 | num_sbr_bits++; | |
| 1162 |
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10901 | if (get_bits1(gb)) // bs_header_flag |
| 1163 | 489 | num_sbr_bits += read_sbr_header(sbr, gb, 0); | |
| 1164 | |||
| 1165 |
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10901 | if (sbr->reset) |
| 1166 | 65 | sbr_reset(ac, sbr); | |
| 1167 | |||
| 1168 |
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10901 | if (sbr->start) |
| 1169 | 6532 | num_sbr_bits += read_sbr_data(ac, sbr, gb, id_aac); | |
| 1170 | |||
| 1171 | 10901 | num_align_bits = ((cnt << 3) - 4 - num_sbr_bits) & 7; | |
| 1172 | 10901 | bytes_read = ((num_sbr_bits + num_align_bits + 4) >> 3); | |
| 1173 | |||
| 1174 |
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10901 | if (bytes_read > cnt) { |
| 1175 | ✗ | av_log(ac->avctx, AV_LOG_ERROR, | |
| 1176 | "Expected to read %d SBR bytes actually read %d.\n", cnt, bytes_read); | ||
| 1177 | ✗ | sbr_turnoff(sbr); | |
| 1178 | } | ||
| 1179 | 10901 | return cnt; | |
| 1180 | } | ||
| 1181 | |||
| 1182 | #if !USE_FIXED | ||
| 1183 | ✗ | static void copy_usac_default_header(SpectralBandReplication *sbr, | |
| 1184 | AACUsacElemConfig *ue) | ||
| 1185 | { | ||
| 1186 | ✗ | sbr->inter_tes = ue->sbr.bs_intertes; | |
| 1187 | |||
| 1188 | ✗ | sbr->spectrum_params.bs_start_freq = ue->sbr.dflt.start_freq; | |
| 1189 | ✗ | sbr->spectrum_params.bs_stop_freq = ue->sbr.dflt.stop_freq; | |
| 1190 | |||
| 1191 | ✗ | sbr->spectrum_params.bs_freq_scale = ue->sbr.dflt.freq_scale; | |
| 1192 | ✗ | sbr->spectrum_params.bs_alter_scale = ue->sbr.dflt.alter_scale; | |
| 1193 | ✗ | sbr->spectrum_params.bs_noise_bands = ue->sbr.dflt.noise_bands; | |
| 1194 | |||
| 1195 | ✗ | sbr->bs_limiter_bands = ue->sbr.dflt.limiter_bands; | |
| 1196 | ✗ | sbr->bs_limiter_gains = ue->sbr.dflt.limiter_gains; | |
| 1197 | ✗ | sbr->bs_interpol_freq = ue->sbr.dflt.interpol_freq; | |
| 1198 | ✗ | sbr->bs_smoothing_mode = ue->sbr.dflt.smoothing_mode; | |
| 1199 | ✗ | } | |
| 1200 | |||
| 1201 | ✗ | int ff_aac_sbr_config_usac(AACDecContext *ac, ChannelElement *che, | |
| 1202 | AACUsacElemConfig *ue) | ||
| 1203 | { | ||
| 1204 | ✗ | SpectralBandReplication *sbr = get_sbr(che); | |
| 1205 | ✗ | sbr_turnoff(sbr); | |
| 1206 | ✗ | return 0; | |
| 1207 | } | ||
| 1208 | |||
| 1209 | ✗ | int ff_aac_sbr_decode_usac_data(AACDecContext *ac, ChannelElement *che, | |
| 1210 | AACUsacElemConfig *ue, GetBitContext *gb, | ||
| 1211 | int sbr_ch, int indep_flag) | ||
| 1212 | { | ||
| 1213 | int ret; | ||
| 1214 | ✗ | SpectralBandReplication *sbr = get_sbr(che); | |
| 1215 | ✗ | int info_present = 1; | |
| 1216 | ✗ | int header_present = 1; | |
| 1217 | |||
| 1218 | ✗ | sbr->reset = 0; | |
| 1219 | ✗ | sbr->usac = 1; | |
| 1220 | |||
| 1221 | ✗ | sbr->sample_rate = ac->oc[1].m4ac.ext_sample_rate; | |
| 1222 | ✗ | sbr->id_aac = sbr_ch == 2 ? TYPE_CPE : TYPE_SCE; | |
| 1223 | |||
| 1224 | ✗ | if (!indep_flag) { | |
| 1225 | ✗ | info_present = get_bits1(gb); | |
| 1226 | ✗ | if (info_present) | |
| 1227 | ✗ | header_present = get_bits1(gb); | |
| 1228 | else | ||
| 1229 | ✗ | header_present = 0; | |
| 1230 | } | ||
| 1231 | |||
| 1232 | ✗ | if (info_present) { | |
| 1233 | /* SbrInfo() */ | ||
| 1234 | ✗ | sbr->bs_amp_res_header = get_bits1(gb); | |
| 1235 | ✗ | sbr->spectrum_params.bs_xover_band = get_bits(gb, 4); | |
| 1236 | ✗ | sbr->bs_sbr_preprocessing = get_bits1(gb); | |
| 1237 | /* if (bs_pvc) ... */ | ||
| 1238 | } | ||
| 1239 | |||
| 1240 | ✗ | if (header_present) { | |
| 1241 | ✗ | if (get_bits1(gb)) { | |
| 1242 | ✗ | int old_bs_limiter_bands = sbr->bs_limiter_bands; | |
| 1243 | SpectrumParameters old_spectrum_params; | ||
| 1244 | ✗ | memcpy(&old_spectrum_params, &sbr->spectrum_params, | |
| 1245 | sizeof(SpectrumParameters)); | ||
| 1246 | |||
| 1247 | ✗ | copy_usac_default_header(sbr, ue); | |
| 1248 | // Check if spectrum parameters changed | ||
| 1249 | ✗ | if (memcmp(&old_spectrum_params, &sbr->spectrum_params, | |
| 1250 | sizeof(SpectrumParameters))) | ||
| 1251 | ✗ | sbr->reset = 1; | |
| 1252 | |||
| 1253 | ✗ | if (sbr->bs_limiter_bands != old_bs_limiter_bands && !sbr->reset) | |
| 1254 | ✗ | sbr_make_f_tablelim(sbr); | |
| 1255 | } else { | ||
| 1256 | ✗ | read_sbr_header(sbr, gb, 1); | |
| 1257 | } | ||
| 1258 | |||
| 1259 | ✗ | sbr->start = 1; | |
| 1260 | } | ||
| 1261 | |||
| 1262 | //Save some state from the previous frame. | ||
| 1263 | ✗ | sbr->kx[0] = sbr->kx[1]; | |
| 1264 | ✗ | sbr->m[0] = sbr->m[1]; | |
| 1265 | ✗ | sbr->kx_and_m_pushed = 1; | |
| 1266 | |||
| 1267 | ✗ | if (sbr->reset) | |
| 1268 | ✗ | sbr_reset(ac, sbr); | |
| 1269 | |||
| 1270 | ✗ | sbr->ready_for_dequant = 1; | |
| 1271 | |||
| 1272 | ✗ | if (sbr_ch == 1) { /* sbr_single_channel_element */ | |
| 1273 | /* if (harmonicSBR) ... */ | ||
| 1274 | |||
| 1275 | ✗ | if (read_sbr_grid(ac, sbr, gb, &sbr->data[0])) | |
| 1276 | ✗ | return -1; | |
| 1277 | |||
| 1278 | ✗ | read_sbr_dtdf(sbr, gb, &sbr->data[0], indep_flag); | |
| 1279 | ✗ | read_sbr_invf(sbr, gb, &sbr->data[0]); | |
| 1280 | |||
| 1281 | ✗ | if ((ret = read_sbr_envelope(ac, sbr, gb, &sbr->data[0], 0)) < 0) | |
| 1282 | ✗ | return ret; | |
| 1283 | |||
| 1284 | ✗ | if ((ret = read_sbr_noise(ac, sbr, gb, &sbr->data[0], 0)) < 0) | |
| 1285 | ✗ | return ret; | |
| 1286 | |||
| 1287 | ✗ | if ((sbr->data[0].bs_add_harmonic_flag = get_bits1(gb))) | |
| 1288 | ✗ | get_bits1_vector(gb, sbr->data[0].bs_add_harmonic, sbr->n[1]); | |
| 1289 | ✗ | } else if (get_bits1(gb)) { /* bs_coupling == 1 */ | |
| 1290 | /* if (harmonicSBR) ... */ | ||
| 1291 | |||
| 1292 | ✗ | if (read_sbr_grid(ac, sbr, gb, &sbr->data[0])) | |
| 1293 | ✗ | return -1; | |
| 1294 | ✗ | copy_sbr_grid(&sbr->data[1], &sbr->data[0]); | |
| 1295 | |||
| 1296 | ✗ | read_sbr_dtdf(sbr, gb, &sbr->data[0], indep_flag); | |
| 1297 | ✗ | read_sbr_dtdf(sbr, gb, &sbr->data[1], indep_flag); | |
| 1298 | |||
| 1299 | ✗ | read_sbr_invf(sbr, gb, &sbr->data[0]); | |
| 1300 | ✗ | memcpy(sbr->data[1].bs_invf_mode[1], sbr->data[1].bs_invf_mode[0], | |
| 1301 | sizeof(sbr->data[1].bs_invf_mode[0])); | ||
| 1302 | ✗ | memcpy(sbr->data[1].bs_invf_mode[0], sbr->data[0].bs_invf_mode[0], | |
| 1303 | sizeof(sbr->data[1].bs_invf_mode[0])); | ||
| 1304 | |||
| 1305 | ✗ | if ((ret = read_sbr_envelope(ac, sbr, gb, &sbr->data[0], 0)) < 0) | |
| 1306 | ✗ | return ret; | |
| 1307 | ✗ | if ((ret = read_sbr_noise(ac, sbr, gb, &sbr->data[0], 0)) < 0) | |
| 1308 | ✗ | return ret; | |
| 1309 | |||
| 1310 | ✗ | if ((ret = read_sbr_envelope(ac, sbr, gb, &sbr->data[1], 1)) < 0) | |
| 1311 | ✗ | return ret; | |
| 1312 | ✗ | if ((ret = read_sbr_noise(ac, sbr, gb, &sbr->data[1], 1)) < 0) | |
| 1313 | ✗ | return ret; | |
| 1314 | |||
| 1315 | ✗ | if ((sbr->data[0].bs_add_harmonic_flag = get_bits1(gb))) | |
| 1316 | ✗ | get_bits1_vector(gb, sbr->data[0].bs_add_harmonic, sbr->n[1]); | |
| 1317 | ✗ | if ((sbr->data[1].bs_add_harmonic_flag = get_bits1(gb))) | |
| 1318 | ✗ | get_bits1_vector(gb, sbr->data[1].bs_add_harmonic, sbr->n[1]); | |
| 1319 | } else { /* bs_coupling == 0 */ | ||
| 1320 | /* if (harmonicSBR) ... */ | ||
| 1321 | ✗ | if (read_sbr_grid(ac, sbr, gb, &sbr->data[0])) | |
| 1322 | ✗ | return -1; | |
| 1323 | ✗ | if (read_sbr_grid(ac, sbr, gb, &sbr->data[1])) | |
| 1324 | ✗ | return -1; | |
| 1325 | |||
| 1326 | ✗ | read_sbr_dtdf(sbr, gb, &sbr->data[0], indep_flag); | |
| 1327 | ✗ | read_sbr_dtdf(sbr, gb, &sbr->data[1], indep_flag); | |
| 1328 | |||
| 1329 | ✗ | read_sbr_invf(sbr, gb, &sbr->data[0]); | |
| 1330 | ✗ | read_sbr_invf(sbr, gb, &sbr->data[1]); | |
| 1331 | |||
| 1332 | ✗ | if ((ret = read_sbr_envelope(ac, sbr, gb, &sbr->data[0], 0)) < 0) | |
| 1333 | ✗ | return ret; | |
| 1334 | ✗ | if ((ret = read_sbr_envelope(ac, sbr, gb, &sbr->data[1], 1)) < 0) | |
| 1335 | ✗ | return ret; | |
| 1336 | |||
| 1337 | ✗ | if ((ret = read_sbr_noise(ac, sbr, gb, &sbr->data[0], 0)) < 0) | |
| 1338 | ✗ | return ret; | |
| 1339 | ✗ | if ((ret = read_sbr_noise(ac, sbr, gb, &sbr->data[1], 1)) < 0) | |
| 1340 | ✗ | return ret; | |
| 1341 | |||
| 1342 | ✗ | if ((sbr->data[0].bs_add_harmonic_flag = get_bits1(gb))) | |
| 1343 | ✗ | get_bits1_vector(gb, sbr->data[0].bs_add_harmonic, sbr->n[1]); | |
| 1344 | ✗ | if ((sbr->data[1].bs_add_harmonic_flag = get_bits1(gb))) | |
| 1345 | ✗ | get_bits1_vector(gb, sbr->data[1].bs_add_harmonic, sbr->n[1]); | |
| 1346 | } | ||
| 1347 | |||
| 1348 | ✗ | return 0; | |
| 1349 | } | ||
| 1350 | #endif | ||
| 1351 | |||
| 1352 | /** | ||
| 1353 | * Analysis QMF Bank (14496-3 sp04 p206) | ||
| 1354 | * | ||
| 1355 | * @param x pointer to the beginning of the first sample window | ||
| 1356 | * @param W array of complex-valued samples split into subbands | ||
| 1357 | */ | ||
| 1358 | #ifndef sbr_qmf_analysis | ||
| 1359 | #if USE_FIXED | ||
| 1360 | 8328 | static void sbr_qmf_analysis(AVFixedDSPContext *dsp, AVTXContext *mdct, | |
| 1361 | av_tx_fn mdct_fn, | ||
| 1362 | #else | ||
| 1363 | 11409 | static void sbr_qmf_analysis(AVFloatDSPContext *dsp, AVTXContext *mdct, | |
| 1364 | av_tx_fn mdct_fn, | ||
| 1365 | #endif /* USE_FIXED */ | ||
| 1366 | SBRDSPContext *sbrdsp, const INTFLOAT *in, INTFLOAT *x, | ||
| 1367 | INTFLOAT z[320], INTFLOAT W[2][32][32][2], int buf_idx) | ||
| 1368 | { | ||
| 1369 | int i; | ||
| 1370 | #if USE_FIXED | ||
| 1371 | int j; | ||
| 1372 | #endif | ||
| 1373 | 19737 | memcpy(x , x+1024, (320-32)*sizeof(x[0])); | |
| 1374 | 19737 | memcpy(x+288, in, 1024*sizeof(x[0])); | |
| 1375 |
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651321 | for (i = 0; i < 32; i++) { // numTimeSlots*RATE = 16*2 as 960 sample frames |
| 1376 | // are not supported | ||
| 1377 | 631584 | dsp->vector_fmul_reverse(z, sbr_qmf_window_ds, x, 320); | |
| 1378 | 631584 | sbrdsp->sum64x5(z); | |
| 1379 | 631584 | sbrdsp->qmf_pre_shuffle(z); | |
| 1380 | #if USE_FIXED | ||
| 1381 |
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17322240 | for (j = 64; j < 128; j++) { |
| 1382 |
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17055744 | if (z[j] > 1<<24) { |
| 1383 | ✗ | av_log(NULL, AV_LOG_WARNING, | |
| 1384 | "sbr_qmf_analysis: value %09d too large, setting to %09d\n", | ||
| 1385 | ✗ | z[j], 1<<24); | |
| 1386 | ✗ | z[j] = 1<<24; | |
| 1387 |
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17055744 | } else if (z[j] < -(1<<24)) { |
| 1388 | ✗ | av_log(NULL, AV_LOG_WARNING, | |
| 1389 | "sbr_qmf_analysis: value %09d too small, setting to %09d\n", | ||
| 1390 | ✗ | z[j], -(1<<24)); | |
| 1391 | ✗ | z[j] = -(1<<24); | |
| 1392 | } | ||
| 1393 | } | ||
| 1394 | #endif | ||
| 1395 | 631584 | mdct_fn(mdct, z, z + 64, sizeof(INTFLOAT)); | |
| 1396 | 631584 | sbrdsp->qmf_post_shuffle(W[buf_idx][i], z); | |
| 1397 | 631584 | x += 32; | |
| 1398 | } | ||
| 1399 | 19737 | } | |
| 1400 | #endif | ||
| 1401 | |||
| 1402 | /** | ||
| 1403 | * Synthesis QMF Bank (14496-3 sp04 p206) and Downsampled Synthesis QMF Bank | ||
| 1404 | * (14496-3 sp04 p206) | ||
| 1405 | */ | ||
| 1406 | #ifndef sbr_qmf_synthesis | ||
| 1407 | 21736 | static void sbr_qmf_synthesis(AVTXContext *mdct, av_tx_fn mdct_fn, | |
| 1408 | #if USE_FIXED | ||
| 1409 | SBRDSPContext *sbrdsp, AVFixedDSPContext *dsp, | ||
| 1410 | #else | ||
| 1411 | SBRDSPContext *sbrdsp, AVFloatDSPContext *dsp, | ||
| 1412 | #endif /* USE_FIXED */ | ||
| 1413 | INTFLOAT *out, INTFLOAT X[2][38][64], | ||
| 1414 | INTFLOAT mdct_buf[2][64], | ||
| 1415 | INTFLOAT *v0, int *v_off, const unsigned int div) | ||
| 1416 | { | ||
| 1417 | int i, n; | ||
| 1418 |
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21736 | const INTFLOAT *sbr_qmf_window = div ? sbr_qmf_window_ds : sbr_qmf_window_us; |
| 1419 | 21736 | const int step = 128 >> div; | |
| 1420 | INTFLOAT *v; | ||
| 1421 |
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|
717288 | for (i = 0; i < 32; i++) { |
| 1422 |
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695552 | if (*v_off < step) { |
| 1423 | 66284 | int saved_samples = (1280 - 128) >> div; | |
| 1424 | 66284 | memcpy(&v0[SBR_SYNTHESIS_BUF_SIZE - saved_samples], v0, saved_samples * sizeof(INTFLOAT)); | |
| 1425 | 66284 | *v_off = SBR_SYNTHESIS_BUF_SIZE - saved_samples - step; | |
| 1426 | } else { | ||
| 1427 | 629268 | *v_off -= step; | |
| 1428 | } | ||
| 1429 | 695552 | v = v0 + *v_off; | |
| 1430 |
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695552 | if (div) { |
| 1431 |
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4853376 | for (n = 0; n < 32; n++) { |
| 1432 | 4706304 | X[0][i][ n] = -X[0][i][n]; | |
| 1433 | 4706304 | X[0][i][32+n] = X[1][i][31-n]; | |
| 1434 | } | ||
| 1435 | 147072 | mdct_fn(mdct, mdct_buf[0], X[0][i], sizeof(INTFLOAT)); | |
| 1436 | 147072 | sbrdsp->qmf_deint_neg(v, mdct_buf[0]); | |
| 1437 | } else { | ||
| 1438 | 548480 | sbrdsp->neg_odd_64(X[1][i]); | |
| 1439 | 548480 | mdct_fn(mdct, mdct_buf[0], X[0][i], sizeof(INTFLOAT)); | |
| 1440 | 548480 | mdct_fn(mdct, mdct_buf[1], X[1][i], sizeof(INTFLOAT)); | |
| 1441 | 548480 | sbrdsp->qmf_deint_bfly(v, mdct_buf[1], mdct_buf[0]); | |
| 1442 | } | ||
| 1443 | 695552 | dsp->vector_fmul (out, v , sbr_qmf_window , 64 >> div); | |
| 1444 | 695552 | dsp->vector_fmul_add(out, v + ( 192 >> div), sbr_qmf_window + ( 64 >> div), out , 64 >> div); | |
| 1445 | 695552 | dsp->vector_fmul_add(out, v + ( 256 >> div), sbr_qmf_window + (128 >> div), out , 64 >> div); | |
| 1446 | 695552 | dsp->vector_fmul_add(out, v + ( 448 >> div), sbr_qmf_window + (192 >> div), out , 64 >> div); | |
| 1447 | 695552 | dsp->vector_fmul_add(out, v + ( 512 >> div), sbr_qmf_window + (256 >> div), out , 64 >> div); | |
| 1448 | 695552 | dsp->vector_fmul_add(out, v + ( 704 >> div), sbr_qmf_window + (320 >> div), out , 64 >> div); | |
| 1449 | 695552 | dsp->vector_fmul_add(out, v + ( 768 >> div), sbr_qmf_window + (384 >> div), out , 64 >> div); | |
| 1450 | 695552 | dsp->vector_fmul_add(out, v + ( 960 >> div), sbr_qmf_window + (448 >> div), out , 64 >> div); | |
| 1451 | 695552 | dsp->vector_fmul_add(out, v + (1024 >> div), sbr_qmf_window + (512 >> div), out , 64 >> div); | |
| 1452 | 695552 | dsp->vector_fmul_add(out, v + (1216 >> div), sbr_qmf_window + (576 >> div), out , 64 >> div); | |
| 1453 | 695552 | out += 64 >> div; | |
| 1454 | } | ||
| 1455 | 21736 | } | |
| 1456 | #endif | ||
| 1457 | |||
| 1458 | /// Generate the subband filtered lowband | ||
| 1459 | 19737 | static int sbr_lf_gen(SpectralBandReplication *sbr, | |
| 1460 | INTFLOAT X_low[32][40][2], const INTFLOAT W[2][32][32][2], | ||
| 1461 | int buf_idx) | ||
| 1462 | { | ||
| 1463 | int i, k; | ||
| 1464 | 19737 | const int t_HFGen = 8; | |
| 1465 | 19737 | const int i_f = 32; | |
| 1466 | 19737 | memset(X_low, 0, 32*sizeof(*X_low)); | |
| 1467 |
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510367 | for (k = 0; k < sbr->kx[1]; k++) { |
| 1468 |
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16190790 | for (i = t_HFGen; i < i_f + t_HFGen; i++) { |
| 1469 | 15700160 | X_low[k][i][0] = W[buf_idx][i - t_HFGen][k][0]; | |
| 1470 | 15700160 | X_low[k][i][1] = W[buf_idx][i - t_HFGen][k][1]; | |
| 1471 | } | ||
| 1472 | } | ||
| 1473 | 19737 | buf_idx = 1-buf_idx; | |
| 1474 |
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511207 | for (k = 0; k < sbr->kx[0]; k++) { |
| 1475 |
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4423230 | for (i = 0; i < t_HFGen; i++) { |
| 1476 | 3931760 | X_low[k][i][0] = W[buf_idx][i + i_f - t_HFGen][k][0]; | |
| 1477 | 3931760 | X_low[k][i][1] = W[buf_idx][i + i_f - t_HFGen][k][1]; | |
| 1478 | } | ||
| 1479 | } | ||
| 1480 | 19737 | return 0; | |
| 1481 | } | ||
| 1482 | |||
| 1483 | /// High Frequency Generator (14496-3 sp04 p215) | ||
| 1484 | 10418 | static int sbr_hf_gen(AACDecContext *ac, SpectralBandReplication *sbr, | |
| 1485 | INTFLOAT X_high[64][40][2], const INTFLOAT X_low[32][40][2], | ||
| 1486 | const INTFLOAT (*alpha0)[2], const INTFLOAT (*alpha1)[2], | ||
| 1487 | const INTFLOAT bw_array[5], const uint8_t *t_env, | ||
| 1488 | int bs_num_env) | ||
| 1489 | { | ||
| 1490 | int j, x; | ||
| 1491 | 10418 | int g = 0; | |
| 1492 | 10418 | int k = sbr->kx[1]; | |
| 1493 |
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36609 | for (j = 0; j < sbr->num_patches; j++) { |
| 1494 |
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282933 | for (x = 0; x < sbr->patch_num_subbands[j]; x++, k++) { |
| 1495 | 256742 | const int p = sbr->patch_start_subband[j] + x; | |
| 1496 |
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533838 | while (g <= sbr->n_q && k >= sbr->f_tablenoise[g]) |
| 1497 | 277096 | g++; | |
| 1498 | 256742 | g--; | |
| 1499 | |||
| 1500 |
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256742 | if (g < 0) { |
| 1501 | ✗ | av_log(ac->avctx, AV_LOG_ERROR, | |
| 1502 | "ERROR : no subband found for frequency %d\n", k); | ||
| 1503 | ✗ | return -1; | |
| 1504 | } | ||
| 1505 | |||
| 1506 | 256742 | sbr->dsp.hf_gen(X_high[k] + ENVELOPE_ADJUSTMENT_OFFSET, | |
| 1507 | 256742 | X_low[p] + ENVELOPE_ADJUSTMENT_OFFSET, | |
| 1508 | 256742 | alpha0[p], alpha1[p], bw_array[g], | |
| 1509 | 256742 | 2 * t_env[0], 2 * t_env[bs_num_env]); | |
| 1510 | } | ||
| 1511 | } | ||
| 1512 |
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10418 | if (k < sbr->m[1] + sbr->kx[1]) |
| 1513 | ✗ | memset(X_high + k, 0, (sbr->m[1] + sbr->kx[1] - k) * sizeof(*X_high)); | |
| 1514 | |||
| 1515 | 10418 | return 0; | |
| 1516 | } | ||
| 1517 | |||
| 1518 | /// Generate the subband filtered lowband | ||
| 1519 | 19737 | static int sbr_x_gen(SpectralBandReplication *sbr, INTFLOAT X[2][38][64], | |
| 1520 | const INTFLOAT Y0[38][64][2], const INTFLOAT Y1[38][64][2], | ||
| 1521 | const INTFLOAT X_low[32][40][2], int ch) | ||
| 1522 | { | ||
| 1523 | int k, i; | ||
| 1524 | 19737 | const int i_f = 32; | |
| 1525 | 19737 | const int i_Temp = FFMAX(2*sbr->data[ch].t_env_num_env_old - i_f, 0); | |
| 1526 | 19737 | memset(X, 0, 2*sizeof(*X)); | |
| 1527 |
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511207 | for (k = 0; k < sbr->kx[0]; k++) { |
| 1528 |
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547200 | for (i = 0; i < i_Temp; i++) { |
| 1529 | 55730 | X[0][i][k] = X_low[k][i + ENVELOPE_ADJUSTMENT_OFFSET][0]; | |
| 1530 | 55730 | X[1][i][k] = X_low[k][i + ENVELOPE_ADJUSTMENT_OFFSET][1]; | |
| 1531 | } | ||
| 1532 | } | ||
| 1533 |
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273883 | for (; k < sbr->kx[0] + sbr->m[0]; k++) { |
| 1534 |
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322412 | for (i = 0; i < i_Temp; i++) { |
| 1535 | 68266 | X[0][i][k] = Y0[i + i_f][k][0]; | |
| 1536 | 68266 | X[1][i][k] = Y0[i + i_f][k][1]; | |
| 1537 | } | ||
| 1538 | } | ||
| 1539 | |||
| 1540 |
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510367 | for (k = 0; k < sbr->kx[1]; k++) { |
| 1541 |
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19078840 | for (i = i_Temp; i < 38; i++) { |
| 1542 | 18588210 | X[0][i][k] = X_low[k][i + ENVELOPE_ADJUSTMENT_OFFSET][0]; | |
| 1543 | 18588210 | X[1][i][k] = X_low[k][i + ENVELOPE_ADJUSTMENT_OFFSET][1]; | |
| 1544 | } | ||
| 1545 | } | ||
| 1546 |
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276479 | for (; k < sbr->kx[1] + sbr->m[1]; k++) { |
| 1547 |
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8404220 | for (i = i_Temp; i < i_f; i++) { |
| 1548 | 8147478 | X[0][i][k] = Y1[i][k][0]; | |
| 1549 | 8147478 | X[1][i][k] = Y1[i][k][1]; | |
| 1550 | } | ||
| 1551 | } | ||
| 1552 | 19737 | return 0; | |
| 1553 | } | ||
| 1554 | |||
| 1555 | /** High Frequency Adjustment (14496-3 sp04 p217) and Mapping | ||
| 1556 | * (14496-3 sp04 p217) | ||
| 1557 | */ | ||
| 1558 | 10418 | static int sbr_mapping(AACDecContext *ac, SpectralBandReplication *sbr, | |
| 1559 | SBRData *ch_data, int e_a[2]) | ||
| 1560 | { | ||
| 1561 | int e, i, m; | ||
| 1562 | |||
| 1563 | 10418 | memset(ch_data->s_indexmapped[1], 0, 7*sizeof(ch_data->s_indexmapped[1])); | |
| 1564 |
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25578 | for (e = 0; e < ch_data->bs_num_env; e++) { |
| 1565 | 15160 | const unsigned int ilim = sbr->n[ch_data->bs_freq_res[e + 1]]; | |
| 1566 |
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15160 | uint16_t *table = ch_data->bs_freq_res[e + 1] ? sbr->f_tablehigh : sbr->f_tablelow; |
| 1567 | int k; | ||
| 1568 | |||
| 1569 |
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15160 | if (sbr->kx[1] != table[0]) { |
| 1570 | ✗ | av_log(ac->avctx, AV_LOG_ERROR, "kx != f_table{high,low}[0]. " | |
| 1571 | "Derived frequency tables were not regenerated.\n"); | ||
| 1572 | ✗ | sbr_turnoff(sbr); | |
| 1573 | ✗ | return AVERROR_BUG; | |
| 1574 | } | ||
| 1575 |
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187076 | for (i = 0; i < ilim; i++) |
| 1576 |
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550938 | for (m = table[i]; m < table[i + 1]; m++) |
| 1577 | 379022 | sbr->e_origmapped[e][m - sbr->kx[1]] = ch_data->env_facs[e+1][i]; | |
| 1578 | |||
| 1579 | // ch_data->bs_num_noise > 1 => 2 noise floors | ||
| 1580 |
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|
15160 | k = (ch_data->bs_num_noise > 1) && (ch_data->t_env[e] >= ch_data->t_q[1]); |
| 1581 |
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60744 | for (i = 0; i < sbr->n_q; i++) |
| 1582 |
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424606 | for (m = sbr->f_tablenoise[i]; m < sbr->f_tablenoise[i + 1]; m++) |
| 1583 | 379022 | sbr->q_mapped[e][m - sbr->kx[1]] = ch_data->noise_facs[k+1][i]; | |
| 1584 | |||
| 1585 |
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197376 | for (i = 0; i < sbr->n[1]; i++) { |
| 1586 |
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182216 | if (ch_data->bs_add_harmonic_flag) { |
| 1587 | 32694 | const unsigned int m_midpoint = | |
| 1588 | 32694 | (sbr->f_tablehigh[i] + sbr->f_tablehigh[i + 1]) >> 1; | |
| 1589 | |||
| 1590 | 32694 | ch_data->s_indexmapped[e + 1][m_midpoint - sbr->kx[1]] = ch_data->bs_add_harmonic[i] * | |
| 1591 |
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|
32694 | (e >= e_a[1] || (ch_data->s_indexmapped[0][m_midpoint - sbr->kx[1]] == 1)); |
| 1592 | } | ||
| 1593 | } | ||
| 1594 | |||
| 1595 |
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187076 | for (i = 0; i < ilim; i++) { |
| 1596 | 171916 | int additional_sinusoid_present = 0; | |
| 1597 |
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544482 | for (m = table[i]; m < table[i + 1]; m++) { |
| 1598 |
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|
376296 | if (ch_data->s_indexmapped[e + 1][m - sbr->kx[1]]) { |
| 1599 | 3730 | additional_sinusoid_present = 1; | |
| 1600 | 3730 | break; | |
| 1601 | } | ||
| 1602 | } | ||
| 1603 | 171916 | memset(&sbr->s_mapped[e][table[i] - sbr->kx[1]], additional_sinusoid_present, | |
| 1604 | 171916 | (table[i + 1] - table[i]) * sizeof(sbr->s_mapped[e][0])); | |
| 1605 | } | ||
| 1606 | } | ||
| 1607 | |||
| 1608 | 10418 | memcpy(ch_data->s_indexmapped[0], ch_data->s_indexmapped[ch_data->bs_num_env], sizeof(ch_data->s_indexmapped[0])); | |
| 1609 | 10418 | return 0; | |
| 1610 | } | ||
| 1611 | |||
| 1612 | /// Estimation of current envelope (14496-3 sp04 p218) | ||
| 1613 | 10418 | static void sbr_env_estimate(AAC_FLOAT (*e_curr)[48], INTFLOAT X_high[64][40][2], | |
| 1614 | SpectralBandReplication *sbr, SBRData *ch_data) | ||
| 1615 | { | ||
| 1616 | int e, m; | ||
| 1617 | 10418 | int kx1 = sbr->kx[1]; | |
| 1618 | |||
| 1619 |
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10418 | if (sbr->bs_interpol_freq) { |
| 1620 |
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25578 | for (e = 0; e < ch_data->bs_num_env; e++) { |
| 1621 | #if USE_FIXED | ||
| 1622 | 5588 | const SoftFloat recip_env_size = av_int2sf(0x20000000 / (ch_data->t_env[e + 1] - ch_data->t_env[e]), 30); | |
| 1623 | #else | ||
| 1624 | 9572 | const float recip_env_size = 0.5f / (ch_data->t_env[e + 1] - ch_data->t_env[e]); | |
| 1625 | #endif /* USE_FIXED */ | ||
| 1626 | 15160 | int ilb = ch_data->t_env[e] * 2 + ENVELOPE_ADJUSTMENT_OFFSET; | |
| 1627 | 15160 | int iub = ch_data->t_env[e + 1] * 2 + ENVELOPE_ADJUSTMENT_OFFSET; | |
| 1628 | |||
| 1629 |
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394182 | for (m = 0; m < sbr->m[1]; m++) { |
| 1630 | 379022 | AAC_FLOAT sum = sbr->dsp.sum_square(X_high[m+kx1] + ilb, iub - ilb); | |
| 1631 | #if USE_FIXED | ||
| 1632 | 127837 | e_curr[e][m] = av_mul_sf(sum, recip_env_size); | |
| 1633 | #else | ||
| 1634 | 251185 | e_curr[e][m] = sum * recip_env_size; | |
| 1635 | #endif /* USE_FIXED */ | ||
| 1636 | } | ||
| 1637 | } | ||
| 1638 | } else { | ||
| 1639 | int k, p; | ||
| 1640 | |||
| 1641 | ✗ | for (e = 0; e < ch_data->bs_num_env; e++) { | |
| 1642 | ✗ | const int env_size = 2 * (ch_data->t_env[e + 1] - ch_data->t_env[e]); | |
| 1643 | ✗ | int ilb = ch_data->t_env[e] * 2 + ENVELOPE_ADJUSTMENT_OFFSET; | |
| 1644 | ✗ | int iub = ch_data->t_env[e + 1] * 2 + ENVELOPE_ADJUSTMENT_OFFSET; | |
| 1645 | ✗ | const uint16_t *table = ch_data->bs_freq_res[e + 1] ? sbr->f_tablehigh : sbr->f_tablelow; | |
| 1646 | |||
| 1647 | ✗ | for (p = 0; p < sbr->n[ch_data->bs_freq_res[e + 1]]; p++) { | |
| 1648 | #if USE_FIXED | ||
| 1649 | ✗ | SoftFloat sum = FLOAT_0; | |
| 1650 | ✗ | const SoftFloat den = av_int2sf(0x20000000 / (env_size * (table[p + 1] - table[p])), 29); | |
| 1651 | ✗ | for (k = table[p]; k < table[p + 1]; k++) { | |
| 1652 | ✗ | sum = av_add_sf(sum, sbr->dsp.sum_square(X_high[k] + ilb, iub - ilb)); | |
| 1653 | } | ||
| 1654 | ✗ | sum = av_mul_sf(sum, den); | |
| 1655 | #else | ||
| 1656 | ✗ | float sum = 0.0f; | |
| 1657 | ✗ | const int den = env_size * (table[p + 1] - table[p]); | |
| 1658 | |||
| 1659 | ✗ | for (k = table[p]; k < table[p + 1]; k++) { | |
| 1660 | ✗ | sum += sbr->dsp.sum_square(X_high[k] + ilb, iub - ilb); | |
| 1661 | } | ||
| 1662 | ✗ | sum /= den; | |
| 1663 | #endif /* USE_FIXED */ | ||
| 1664 | ✗ | for (k = table[p]; k < table[p + 1]; k++) { | |
| 1665 | ✗ | e_curr[e][k - kx1] = sum; | |
| 1666 | } | ||
| 1667 | } | ||
| 1668 | } | ||
| 1669 | } | ||
| 1670 | 10418 | } | |
| 1671 | |||
| 1672 | 12411 | void AAC_RENAME(ff_aac_sbr_apply)(AACDecContext *ac, ChannelElement *che, | |
| 1673 | int id_aac, void *L_, void *R_) | ||
| 1674 | { | ||
| 1675 | 12411 | INTFLOAT *L = L_, *R = R_; | |
| 1676 | 12411 | SpectralBandReplication *sbr = get_sbr(che); | |
| 1677 | 12411 | int downsampled = ac->oc[1].m4ac.ext_sample_rate < sbr->sample_rate; | |
| 1678 | int ch; | ||
| 1679 |
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12411 | int nch = (id_aac == TYPE_CPE) ? 2 : 1; |
| 1680 | int err; | ||
| 1681 | |||
| 1682 |
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12411 | if (id_aac != sbr->id_aac) { |
| 1683 | ✗ | av_log(ac->avctx, id_aac == TYPE_LFE ? AV_LOG_VERBOSE : AV_LOG_WARNING, | |
| 1684 | "element type mismatch %d != %d\n", id_aac, sbr->id_aac); | ||
| 1685 | ✗ | sbr_turnoff(sbr); | |
| 1686 | } | ||
| 1687 | |||
| 1688 |
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12411 | if (sbr->start && !sbr->ready_for_dequant) { |
| 1689 | ✗ | av_log(ac->avctx, AV_LOG_ERROR, | |
| 1690 | "No quantized data read for sbr_dequant.\n"); | ||
| 1691 | ✗ | sbr_turnoff(sbr); | |
| 1692 | } | ||
| 1693 | |||
| 1694 |
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12411 | if (!sbr->kx_and_m_pushed) { |
| 1695 | 1510 | sbr->kx[0] = sbr->kx[1]; | |
| 1696 | 1510 | sbr->m[0] = sbr->m[1]; | |
| 1697 | } else { | ||
| 1698 | 10901 | sbr->kx_and_m_pushed = 0; | |
| 1699 | } | ||
| 1700 | |||
| 1701 |
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12411 | if (sbr->start) { |
| 1702 | 6532 | sbr_dequant(sbr, id_aac); | |
| 1703 | 6532 | sbr->ready_for_dequant = 0; | |
| 1704 | } | ||
| 1705 |
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32148 | for (ch = 0; ch < nch; ch++) { |
| 1706 | /* decode channel */ | ||
| 1707 | 19737 | sbr_qmf_analysis(ac->fdsp, sbr->mdct_ana, sbr->mdct_ana_fn, &sbr->dsp, | |
| 1708 | 19737 | ch ? R : L, sbr->data[ch].analysis_filterbank_samples, | |
| 1709 | 19737 | (INTFLOAT*)sbr->qmf_filter_scratch, | |
| 1710 |
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19737 | sbr->data[ch].W, sbr->data[ch].Ypos); |
| 1711 | 19737 | sbr->c.sbr_lf_gen(sbr, sbr->X_low, | |
| 1712 | 19737 | (const INTFLOAT (*)[32][32][2]) sbr->data[ch].W, | |
| 1713 | sbr->data[ch].Ypos); | ||
| 1714 | 19737 | sbr->data[ch].Ypos ^= 1; | |
| 1715 |
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19737 | if (sbr->start) { |
| 1716 | 10418 | sbr->c.sbr_hf_inverse_filter(&sbr->dsp, sbr->alpha0, sbr->alpha1, | |
| 1717 | 10418 | (const INTFLOAT (*)[40][2]) sbr->X_low, sbr->k[0]); | |
| 1718 | 10418 | sbr_chirp(sbr, &sbr->data[ch]); | |
| 1719 |
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10418 | av_assert0(sbr->data[ch].bs_num_env > 0); |
| 1720 | 10418 | sbr_hf_gen(ac, sbr, sbr->X_high, | |
| 1721 | 10418 | (const INTFLOAT (*)[40][2]) sbr->X_low, | |
| 1722 | 10418 | (const INTFLOAT (*)[2]) sbr->alpha0, | |
| 1723 | 10418 | (const INTFLOAT (*)[2]) sbr->alpha1, | |
| 1724 | 10418 | sbr->data[ch].bw_array, sbr->data[ch].t_env, | |
| 1725 | 6631 | sbr->data[ch].bs_num_env); | |
| 1726 | |||
| 1727 | // hf_adj | ||
| 1728 | 10418 | err = sbr_mapping(ac, sbr, &sbr->data[ch], sbr->data[ch].e_a); | |
| 1729 |
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10418 | if (!err) { |
| 1730 | 10418 | sbr_env_estimate(sbr->e_curr, sbr->X_high, sbr, &sbr->data[ch]); | |
| 1731 | 10418 | sbr_gain_calc(sbr, &sbr->data[ch], sbr->data[ch].e_a); | |
| 1732 | 10418 | sbr->c.sbr_hf_assemble(sbr->data[ch].Y[sbr->data[ch].Ypos], | |
| 1733 | 10418 | (const INTFLOAT (*)[40][2]) sbr->X_high, | |
| 1734 | sbr, &sbr->data[ch], | ||
| 1735 | 10418 | sbr->data[ch].e_a); | |
| 1736 | } | ||
| 1737 | } | ||
| 1738 | |||
| 1739 | /* synthesis */ | ||
| 1740 | 19737 | sbr->c.sbr_x_gen(sbr, sbr->X[ch], | |
| 1741 | 19737 | (const INTFLOAT (*)[64][2]) sbr->data[ch].Y[1-sbr->data[ch].Ypos], | |
| 1742 | 19737 | (const INTFLOAT (*)[64][2]) sbr->data[ch].Y[ sbr->data[ch].Ypos], | |
| 1743 | 19737 | (const INTFLOAT (*)[40][2]) sbr->X_low, ch); | |
| 1744 | } | ||
| 1745 | |||
| 1746 |
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12411 | if (ac->oc[1].m4ac.ps == 1) { |
| 1747 |
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1999 | if (sbr->ps.common.start) { |
| 1748 | 1616 | AAC_RENAME(ff_ps_apply)(&sbr->ps, sbr->X[0], sbr->X[1], sbr->kx[1] + sbr->m[1]); | |
| 1749 | } else { | ||
| 1750 | 383 | memcpy(sbr->X[1], sbr->X[0], sizeof(sbr->X[0])); | |
| 1751 | } | ||
| 1752 | 1999 | nch = 2; | |
| 1753 | } | ||
| 1754 | |||
| 1755 | 12411 | sbr_qmf_synthesis(sbr->mdct, sbr->mdct_fn, &sbr->dsp, ac->fdsp, | |
| 1756 | 12411 | L, sbr->X[0], sbr->qmf_filter_scratch, | |
| 1757 | 12411 | sbr->data[0].synthesis_filterbank_samples, | |
| 1758 | &sbr->data[0].synthesis_filterbank_samples_offset, | ||
| 1759 | downsampled); | ||
| 1760 |
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12411 | if (nch == 2) |
| 1761 | 9325 | sbr_qmf_synthesis(sbr->mdct, sbr->mdct_fn, &sbr->dsp, ac->fdsp, | |
| 1762 | 9325 | R, sbr->X[1], sbr->qmf_filter_scratch, | |
| 1763 | 9325 | sbr->data[1].synthesis_filterbank_samples, | |
| 1764 | &sbr->data[1].synthesis_filterbank_samples_offset, | ||
| 1765 | downsampled); | ||
| 1766 | 12411 | } | |
| 1767 | |||
| 1768 | 406 | static void aacsbr_func_ptr_init(AACSBRContext *c) | |
| 1769 | { | ||
| 1770 | 406 | c->sbr_lf_gen = sbr_lf_gen; | |
| 1771 | 406 | c->sbr_hf_assemble = sbr_hf_assemble; | |
| 1772 | 406 | c->sbr_x_gen = sbr_x_gen; | |
| 1773 | 406 | c->sbr_hf_inverse_filter = sbr_hf_inverse_filter; | |
| 1774 | 406 | } | |
| 1775 |