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00029 #include "aac.h"
00030 #include "sbr.h"
00031 #include "aacsbr.h"
00032 #include "aacsbrdata.h"
00033 #include "fft.h"
00034 #include "aacps.h"
00035 #include "sbrdsp.h"
00036 #include "libavutil/libm.h"
00037 #include "libavutil/avassert.h"
00038
00039 #include <stdint.h>
00040 #include <float.h>
00041 #include <math.h>
00042
00043 #define ENVELOPE_ADJUSTMENT_OFFSET 2
00044 #define NOISE_FLOOR_OFFSET 6.0f
00045
00049 enum {
00050 T_HUFFMAN_ENV_1_5DB,
00051 F_HUFFMAN_ENV_1_5DB,
00052 T_HUFFMAN_ENV_BAL_1_5DB,
00053 F_HUFFMAN_ENV_BAL_1_5DB,
00054 T_HUFFMAN_ENV_3_0DB,
00055 F_HUFFMAN_ENV_3_0DB,
00056 T_HUFFMAN_ENV_BAL_3_0DB,
00057 F_HUFFMAN_ENV_BAL_3_0DB,
00058 T_HUFFMAN_NOISE_3_0DB,
00059 T_HUFFMAN_NOISE_BAL_3_0DB,
00060 };
00061
00065 enum {
00066 FIXFIX,
00067 FIXVAR,
00068 VARFIX,
00069 VARVAR,
00070 };
00071
00072 enum {
00073 EXTENSION_ID_PS = 2,
00074 };
00075
00076 static VLC vlc_sbr[10];
00077 static const int8_t vlc_sbr_lav[10] =
00078 { 60, 60, 24, 24, 31, 31, 12, 12, 31, 12 };
00079
00080 #define SBR_INIT_VLC_STATIC(num, size) \
00081 INIT_VLC_STATIC(&vlc_sbr[num], 9, sbr_tmp[num].table_size / sbr_tmp[num].elem_size, \
00082 sbr_tmp[num].sbr_bits , 1, 1, \
00083 sbr_tmp[num].sbr_codes, sbr_tmp[num].elem_size, sbr_tmp[num].elem_size, \
00084 size)
00085
00086 #define SBR_VLC_ROW(name) \
00087 { name ## _codes, name ## _bits, sizeof(name ## _codes), sizeof(name ## _codes[0]) }
00088
00089 av_cold void ff_aac_sbr_init(void)
00090 {
00091 int n;
00092 static const struct {
00093 const void *sbr_codes, *sbr_bits;
00094 const unsigned int table_size, elem_size;
00095 } sbr_tmp[] = {
00096 SBR_VLC_ROW(t_huffman_env_1_5dB),
00097 SBR_VLC_ROW(f_huffman_env_1_5dB),
00098 SBR_VLC_ROW(t_huffman_env_bal_1_5dB),
00099 SBR_VLC_ROW(f_huffman_env_bal_1_5dB),
00100 SBR_VLC_ROW(t_huffman_env_3_0dB),
00101 SBR_VLC_ROW(f_huffman_env_3_0dB),
00102 SBR_VLC_ROW(t_huffman_env_bal_3_0dB),
00103 SBR_VLC_ROW(f_huffman_env_bal_3_0dB),
00104 SBR_VLC_ROW(t_huffman_noise_3_0dB),
00105 SBR_VLC_ROW(t_huffman_noise_bal_3_0dB),
00106 };
00107
00108
00109 SBR_INIT_VLC_STATIC(0, 1098);
00110 SBR_INIT_VLC_STATIC(1, 1092);
00111 SBR_INIT_VLC_STATIC(2, 768);
00112 SBR_INIT_VLC_STATIC(3, 1026);
00113 SBR_INIT_VLC_STATIC(4, 1058);
00114 SBR_INIT_VLC_STATIC(5, 1052);
00115 SBR_INIT_VLC_STATIC(6, 544);
00116 SBR_INIT_VLC_STATIC(7, 544);
00117 SBR_INIT_VLC_STATIC(8, 592);
00118 SBR_INIT_VLC_STATIC(9, 512);
00119
00120 for (n = 1; n < 320; n++)
00121 sbr_qmf_window_us[320 + n] = sbr_qmf_window_us[320 - n];
00122 sbr_qmf_window_us[384] = -sbr_qmf_window_us[384];
00123 sbr_qmf_window_us[512] = -sbr_qmf_window_us[512];
00124
00125 for (n = 0; n < 320; n++)
00126 sbr_qmf_window_ds[n] = sbr_qmf_window_us[2*n];
00127
00128 ff_ps_init();
00129 }
00130
00132 static void sbr_turnoff(SpectralBandReplication *sbr) {
00133 sbr->start = 0;
00134
00135 sbr->kx[1] = 32;
00136 sbr->m[1] = 0;
00137
00138 sbr->data[0].e_a[1] = sbr->data[1].e_a[1] = -1;
00139 memset(&sbr->spectrum_params, -1, sizeof(SpectrumParameters));
00140 }
00141
00142 av_cold void ff_aac_sbr_ctx_init(AACContext *ac, SpectralBandReplication *sbr)
00143 {
00144 if(sbr->mdct.mdct_bits)
00145 return;
00146 sbr->kx[0] = sbr->kx[1];
00147 sbr_turnoff(sbr);
00148 sbr->data[0].synthesis_filterbank_samples_offset = SBR_SYNTHESIS_BUF_SIZE - (1280 - 128);
00149 sbr->data[1].synthesis_filterbank_samples_offset = SBR_SYNTHESIS_BUF_SIZE - (1280 - 128);
00150
00151
00152
00153 ff_mdct_init(&sbr->mdct, 7, 1, 1.0 / (64 * 32768.0));
00154 ff_mdct_init(&sbr->mdct_ana, 7, 1, -2.0 * 32768.0);
00155 ff_ps_ctx_init(&sbr->ps);
00156 ff_sbrdsp_init(&sbr->dsp);
00157 }
00158
00159 av_cold void ff_aac_sbr_ctx_close(SpectralBandReplication *sbr)
00160 {
00161 ff_mdct_end(&sbr->mdct);
00162 ff_mdct_end(&sbr->mdct_ana);
00163 }
00164
00165 static int qsort_comparison_function_int16(const void *a, const void *b)
00166 {
00167 return *(const int16_t *)a - *(const int16_t *)b;
00168 }
00169
00170 static inline int in_table_int16(const int16_t *table, int last_el, int16_t needle)
00171 {
00172 int i;
00173 for (i = 0; i <= last_el; i++)
00174 if (table[i] == needle)
00175 return 1;
00176 return 0;
00177 }
00178
00180 static void sbr_make_f_tablelim(SpectralBandReplication *sbr)
00181 {
00182 int k;
00183 if (sbr->bs_limiter_bands > 0) {
00184 static const float bands_warped[3] = { 1.32715174233856803909f,
00185 1.18509277094158210129f,
00186 1.11987160404675912501f };
00187 const float lim_bands_per_octave_warped = bands_warped[sbr->bs_limiter_bands - 1];
00188 int16_t patch_borders[7];
00189 uint16_t *in = sbr->f_tablelim + 1, *out = sbr->f_tablelim;
00190
00191 patch_borders[0] = sbr->kx[1];
00192 for (k = 1; k <= sbr->num_patches; k++)
00193 patch_borders[k] = patch_borders[k-1] + sbr->patch_num_subbands[k-1];
00194
00195 memcpy(sbr->f_tablelim, sbr->f_tablelow,
00196 (sbr->n[0] + 1) * sizeof(sbr->f_tablelow[0]));
00197 if (sbr->num_patches > 1)
00198 memcpy(sbr->f_tablelim + sbr->n[0] + 1, patch_borders + 1,
00199 (sbr->num_patches - 1) * sizeof(patch_borders[0]));
00200
00201 qsort(sbr->f_tablelim, sbr->num_patches + sbr->n[0],
00202 sizeof(sbr->f_tablelim[0]),
00203 qsort_comparison_function_int16);
00204
00205 sbr->n_lim = sbr->n[0] + sbr->num_patches - 1;
00206 while (out < sbr->f_tablelim + sbr->n_lim) {
00207 if (*in >= *out * lim_bands_per_octave_warped) {
00208 *++out = *in++;
00209 } else if (*in == *out ||
00210 !in_table_int16(patch_borders, sbr->num_patches, *in)) {
00211 in++;
00212 sbr->n_lim--;
00213 } else if (!in_table_int16(patch_borders, sbr->num_patches, *out)) {
00214 *out = *in++;
00215 sbr->n_lim--;
00216 } else {
00217 *++out = *in++;
00218 }
00219 }
00220 } else {
00221 sbr->f_tablelim[0] = sbr->f_tablelow[0];
00222 sbr->f_tablelim[1] = sbr->f_tablelow[sbr->n[0]];
00223 sbr->n_lim = 1;
00224 }
00225 }
00226
00227 static unsigned int read_sbr_header(SpectralBandReplication *sbr, GetBitContext *gb)
00228 {
00229 unsigned int cnt = get_bits_count(gb);
00230 uint8_t bs_header_extra_1;
00231 uint8_t bs_header_extra_2;
00232 int old_bs_limiter_bands = sbr->bs_limiter_bands;
00233 SpectrumParameters old_spectrum_params;
00234
00235 sbr->start = 1;
00236
00237
00238 memcpy(&old_spectrum_params, &sbr->spectrum_params, sizeof(SpectrumParameters));
00239
00240 sbr->bs_amp_res_header = get_bits1(gb);
00241 sbr->spectrum_params.bs_start_freq = get_bits(gb, 4);
00242 sbr->spectrum_params.bs_stop_freq = get_bits(gb, 4);
00243 sbr->spectrum_params.bs_xover_band = get_bits(gb, 3);
00244 skip_bits(gb, 2);
00245
00246 bs_header_extra_1 = get_bits1(gb);
00247 bs_header_extra_2 = get_bits1(gb);
00248
00249 if (bs_header_extra_1) {
00250 sbr->spectrum_params.bs_freq_scale = get_bits(gb, 2);
00251 sbr->spectrum_params.bs_alter_scale = get_bits1(gb);
00252 sbr->spectrum_params.bs_noise_bands = get_bits(gb, 2);
00253 } else {
00254 sbr->spectrum_params.bs_freq_scale = 2;
00255 sbr->spectrum_params.bs_alter_scale = 1;
00256 sbr->spectrum_params.bs_noise_bands = 2;
00257 }
00258
00259
00260 if (memcmp(&old_spectrum_params, &sbr->spectrum_params, sizeof(SpectrumParameters)))
00261 sbr->reset = 1;
00262
00263 if (bs_header_extra_2) {
00264 sbr->bs_limiter_bands = get_bits(gb, 2);
00265 sbr->bs_limiter_gains = get_bits(gb, 2);
00266 sbr->bs_interpol_freq = get_bits1(gb);
00267 sbr->bs_smoothing_mode = get_bits1(gb);
00268 } else {
00269 sbr->bs_limiter_bands = 2;
00270 sbr->bs_limiter_gains = 2;
00271 sbr->bs_interpol_freq = 1;
00272 sbr->bs_smoothing_mode = 1;
00273 }
00274
00275 if (sbr->bs_limiter_bands != old_bs_limiter_bands && !sbr->reset)
00276 sbr_make_f_tablelim(sbr);
00277
00278 return get_bits_count(gb) - cnt;
00279 }
00280
00281 static int array_min_int16(const int16_t *array, int nel)
00282 {
00283 int i, min = array[0];
00284 for (i = 1; i < nel; i++)
00285 min = FFMIN(array[i], min);
00286 return min;
00287 }
00288
00289 static void make_bands(int16_t* bands, int start, int stop, int num_bands)
00290 {
00291 int k, previous, present;
00292 float base, prod;
00293
00294 base = powf((float)stop / start, 1.0f / num_bands);
00295 prod = start;
00296 previous = start;
00297
00298 for (k = 0; k < num_bands-1; k++) {
00299 prod *= base;
00300 present = lrintf(prod);
00301 bands[k] = present - previous;
00302 previous = present;
00303 }
00304 bands[num_bands-1] = stop - previous;
00305 }
00306
00307 static int check_n_master(AVCodecContext *avctx, int n_master, int bs_xover_band)
00308 {
00309
00310 if (n_master <= 0) {
00311 av_log(avctx, AV_LOG_ERROR, "Invalid n_master: %d\n", n_master);
00312 return -1;
00313 }
00314 if (bs_xover_band >= n_master) {
00315 av_log(avctx, AV_LOG_ERROR,
00316 "Invalid bitstream, crossover band index beyond array bounds: %d\n",
00317 bs_xover_band);
00318 return -1;
00319 }
00320 return 0;
00321 }
00322
00324 static int sbr_make_f_master(AACContext *ac, SpectralBandReplication *sbr,
00325 SpectrumParameters *spectrum)
00326 {
00327 unsigned int temp, max_qmf_subbands;
00328 unsigned int start_min, stop_min;
00329 int k;
00330 const int8_t *sbr_offset_ptr;
00331 int16_t stop_dk[13];
00332
00333 if (sbr->sample_rate < 32000) {
00334 temp = 3000;
00335 } else if (sbr->sample_rate < 64000) {
00336 temp = 4000;
00337 } else
00338 temp = 5000;
00339
00340 switch (sbr->sample_rate) {
00341 case 16000:
00342 sbr_offset_ptr = sbr_offset[0];
00343 break;
00344 case 22050:
00345 sbr_offset_ptr = sbr_offset[1];
00346 break;
00347 case 24000:
00348 sbr_offset_ptr = sbr_offset[2];
00349 break;
00350 case 32000:
00351 sbr_offset_ptr = sbr_offset[3];
00352 break;
00353 case 44100: case 48000: case 64000:
00354 sbr_offset_ptr = sbr_offset[4];
00355 break;
00356 case 88200: case 96000: case 128000: case 176400: case 192000:
00357 sbr_offset_ptr = sbr_offset[5];
00358 break;
00359 default:
00360 av_log(ac->avctx, AV_LOG_ERROR,
00361 "Unsupported sample rate for SBR: %d\n", sbr->sample_rate);
00362 return -1;
00363 }
00364
00365 start_min = ((temp << 7) + (sbr->sample_rate >> 1)) / sbr->sample_rate;
00366 stop_min = ((temp << 8) + (sbr->sample_rate >> 1)) / sbr->sample_rate;
00367
00368 sbr->k[0] = start_min + sbr_offset_ptr[spectrum->bs_start_freq];
00369
00370 if (spectrum->bs_stop_freq < 14) {
00371 sbr->k[2] = stop_min;
00372 make_bands(stop_dk, stop_min, 64, 13);
00373 qsort(stop_dk, 13, sizeof(stop_dk[0]), qsort_comparison_function_int16);
00374 for (k = 0; k < spectrum->bs_stop_freq; k++)
00375 sbr->k[2] += stop_dk[k];
00376 } else if (spectrum->bs_stop_freq == 14) {
00377 sbr->k[2] = 2*sbr->k[0];
00378 } else if (spectrum->bs_stop_freq == 15) {
00379 sbr->k[2] = 3*sbr->k[0];
00380 } else {
00381 av_log(ac->avctx, AV_LOG_ERROR,
00382 "Invalid bs_stop_freq: %d\n", spectrum->bs_stop_freq);
00383 return -1;
00384 }
00385 sbr->k[2] = FFMIN(64, sbr->k[2]);
00386
00387
00388 if (sbr->sample_rate <= 32000) {
00389 max_qmf_subbands = 48;
00390 } else if (sbr->sample_rate == 44100) {
00391 max_qmf_subbands = 35;
00392 } else if (sbr->sample_rate >= 48000)
00393 max_qmf_subbands = 32;
00394
00395 if (sbr->k[2] - sbr->k[0] > max_qmf_subbands) {
00396 av_log(ac->avctx, AV_LOG_ERROR,
00397 "Invalid bitstream, too many QMF subbands: %d\n", sbr->k[2] - sbr->k[0]);
00398 return -1;
00399 }
00400
00401 if (!spectrum->bs_freq_scale) {
00402 int dk, k2diff;
00403
00404 dk = spectrum->bs_alter_scale + 1;
00405 sbr->n_master = ((sbr->k[2] - sbr->k[0] + (dk&2)) >> dk) << 1;
00406 if (check_n_master(ac->avctx, sbr->n_master, sbr->spectrum_params.bs_xover_band))
00407 return -1;
00408
00409 for (k = 1; k <= sbr->n_master; k++)
00410 sbr->f_master[k] = dk;
00411
00412 k2diff = sbr->k[2] - sbr->k[0] - sbr->n_master * dk;
00413 if (k2diff < 0) {
00414 sbr->f_master[1]--;
00415 sbr->f_master[2]-= (k2diff < -1);
00416 } else if (k2diff) {
00417 sbr->f_master[sbr->n_master]++;
00418 }
00419
00420 sbr->f_master[0] = sbr->k[0];
00421 for (k = 1; k <= sbr->n_master; k++)
00422 sbr->f_master[k] += sbr->f_master[k - 1];
00423
00424 } else {
00425 int half_bands = 7 - spectrum->bs_freq_scale;
00426 int two_regions, num_bands_0;
00427 int vdk0_max, vdk1_min;
00428 int16_t vk0[49];
00429
00430 if (49 * sbr->k[2] > 110 * sbr->k[0]) {
00431 two_regions = 1;
00432 sbr->k[1] = 2 * sbr->k[0];
00433 } else {
00434 two_regions = 0;
00435 sbr->k[1] = sbr->k[2];
00436 }
00437
00438 num_bands_0 = lrintf(half_bands * log2f(sbr->k[1] / (float)sbr->k[0])) * 2;
00439
00440 if (num_bands_0 <= 0) {
00441 av_log(ac->avctx, AV_LOG_ERROR, "Invalid num_bands_0: %d\n", num_bands_0);
00442 return -1;
00443 }
00444
00445 vk0[0] = 0;
00446
00447 make_bands(vk0+1, sbr->k[0], sbr->k[1], num_bands_0);
00448
00449 qsort(vk0 + 1, num_bands_0, sizeof(vk0[1]), qsort_comparison_function_int16);
00450 vdk0_max = vk0[num_bands_0];
00451
00452 vk0[0] = sbr->k[0];
00453 for (k = 1; k <= num_bands_0; k++) {
00454 if (vk0[k] <= 0) {
00455 av_log(ac->avctx, AV_LOG_ERROR, "Invalid vDk0[%d]: %d\n", k, vk0[k]);
00456 return -1;
00457 }
00458 vk0[k] += vk0[k-1];
00459 }
00460
00461 if (two_regions) {
00462 int16_t vk1[49];
00463 float invwarp = spectrum->bs_alter_scale ? 0.76923076923076923077f
00464 : 1.0f;
00465 int num_bands_1 = lrintf(half_bands * invwarp *
00466 log2f(sbr->k[2] / (float)sbr->k[1])) * 2;
00467
00468 make_bands(vk1+1, sbr->k[1], sbr->k[2], num_bands_1);
00469
00470 vdk1_min = array_min_int16(vk1 + 1, num_bands_1);
00471
00472 if (vdk1_min < vdk0_max) {
00473 int change;
00474 qsort(vk1 + 1, num_bands_1, sizeof(vk1[1]), qsort_comparison_function_int16);
00475 change = FFMIN(vdk0_max - vk1[1], (vk1[num_bands_1] - vk1[1]) >> 1);
00476 vk1[1] += change;
00477 vk1[num_bands_1] -= change;
00478 }
00479
00480 qsort(vk1 + 1, num_bands_1, sizeof(vk1[1]), qsort_comparison_function_int16);
00481
00482 vk1[0] = sbr->k[1];
00483 for (k = 1; k <= num_bands_1; k++) {
00484 if (vk1[k] <= 0) {
00485 av_log(ac->avctx, AV_LOG_ERROR, "Invalid vDk1[%d]: %d\n", k, vk1[k]);
00486 return -1;
00487 }
00488 vk1[k] += vk1[k-1];
00489 }
00490
00491 sbr->n_master = num_bands_0 + num_bands_1;
00492 if (check_n_master(ac->avctx, sbr->n_master, sbr->spectrum_params.bs_xover_band))
00493 return -1;
00494 memcpy(&sbr->f_master[0], vk0,
00495 (num_bands_0 + 1) * sizeof(sbr->f_master[0]));
00496 memcpy(&sbr->f_master[num_bands_0 + 1], vk1 + 1,
00497 num_bands_1 * sizeof(sbr->f_master[0]));
00498
00499 } else {
00500 sbr->n_master = num_bands_0;
00501 if (check_n_master(ac->avctx, sbr->n_master, sbr->spectrum_params.bs_xover_band))
00502 return -1;
00503 memcpy(sbr->f_master, vk0, (num_bands_0 + 1) * sizeof(sbr->f_master[0]));
00504 }
00505 }
00506
00507 return 0;
00508 }
00509
00511 static int sbr_hf_calc_npatches(AACContext *ac, SpectralBandReplication *sbr)
00512 {
00513 int i, k, sb = 0;
00514 int msb = sbr->k[0];
00515 int usb = sbr->kx[1];
00516 int goal_sb = ((1000 << 11) + (sbr->sample_rate >> 1)) / sbr->sample_rate;
00517
00518 sbr->num_patches = 0;
00519
00520 if (goal_sb < sbr->kx[1] + sbr->m[1]) {
00521 for (k = 0; sbr->f_master[k] < goal_sb; k++) ;
00522 } else
00523 k = sbr->n_master;
00524
00525 do {
00526 int odd = 0;
00527 for (i = k; i == k || sb > (sbr->k[0] - 1 + msb - odd); i--) {
00528 sb = sbr->f_master[i];
00529 odd = (sb + sbr->k[0]) & 1;
00530 }
00531
00532
00533
00534
00535
00536 if (sbr->num_patches > 5) {
00537 av_log(ac->avctx, AV_LOG_ERROR, "Too many patches: %d\n", sbr->num_patches);
00538 return -1;
00539 }
00540
00541 sbr->patch_num_subbands[sbr->num_patches] = FFMAX(sb - usb, 0);
00542 sbr->patch_start_subband[sbr->num_patches] = sbr->k[0] - odd - sbr->patch_num_subbands[sbr->num_patches];
00543
00544 if (sbr->patch_num_subbands[sbr->num_patches] > 0) {
00545 usb = sb;
00546 msb = sb;
00547 sbr->num_patches++;
00548 } else
00549 msb = sbr->kx[1];
00550
00551 if (sbr->f_master[k] - sb < 3)
00552 k = sbr->n_master;
00553 } while (sb != sbr->kx[1] + sbr->m[1]);
00554
00555 if (sbr->num_patches > 1 && sbr->patch_num_subbands[sbr->num_patches-1] < 3)
00556 sbr->num_patches--;
00557
00558 return 0;
00559 }
00560
00562 static int sbr_make_f_derived(AACContext *ac, SpectralBandReplication *sbr)
00563 {
00564 int k, temp;
00565
00566 sbr->n[1] = sbr->n_master - sbr->spectrum_params.bs_xover_band;
00567 sbr->n[0] = (sbr->n[1] + 1) >> 1;
00568
00569 memcpy(sbr->f_tablehigh, &sbr->f_master[sbr->spectrum_params.bs_xover_band],
00570 (sbr->n[1] + 1) * sizeof(sbr->f_master[0]));
00571 sbr->m[1] = sbr->f_tablehigh[sbr->n[1]] - sbr->f_tablehigh[0];
00572 sbr->kx[1] = sbr->f_tablehigh[0];
00573
00574
00575 if (sbr->kx[1] + sbr->m[1] > 64) {
00576 av_log(ac->avctx, AV_LOG_ERROR,
00577 "Stop frequency border too high: %d\n", sbr->kx[1] + sbr->m[1]);
00578 return -1;
00579 }
00580 if (sbr->kx[1] > 32) {
00581 av_log(ac->avctx, AV_LOG_ERROR, "Start frequency border too high: %d\n", sbr->kx[1]);
00582 return -1;
00583 }
00584
00585 sbr->f_tablelow[0] = sbr->f_tablehigh[0];
00586 temp = sbr->n[1] & 1;
00587 for (k = 1; k <= sbr->n[0]; k++)
00588 sbr->f_tablelow[k] = sbr->f_tablehigh[2 * k - temp];
00589
00590 sbr->n_q = FFMAX(1, lrintf(sbr->spectrum_params.bs_noise_bands *
00591 log2f(sbr->k[2] / (float)sbr->kx[1])));
00592 if (sbr->n_q > 5) {
00593 av_log(ac->avctx, AV_LOG_ERROR, "Too many noise floor scale factors: %d\n", sbr->n_q);
00594 return -1;
00595 }
00596
00597 sbr->f_tablenoise[0] = sbr->f_tablelow[0];
00598 temp = 0;
00599 for (k = 1; k <= sbr->n_q; k++) {
00600 temp += (sbr->n[0] - temp) / (sbr->n_q + 1 - k);
00601 sbr->f_tablenoise[k] = sbr->f_tablelow[temp];
00602 }
00603
00604 if (sbr_hf_calc_npatches(ac, sbr) < 0)
00605 return -1;
00606
00607 sbr_make_f_tablelim(sbr);
00608
00609 sbr->data[0].f_indexnoise = 0;
00610 sbr->data[1].f_indexnoise = 0;
00611
00612 return 0;
00613 }
00614
00615 static av_always_inline void get_bits1_vector(GetBitContext *gb, uint8_t *vec,
00616 int elements)
00617 {
00618 int i;
00619 for (i = 0; i < elements; i++) {
00620 vec[i] = get_bits1(gb);
00621 }
00622 }
00623
00625 static const int8_t ceil_log2[] = {
00626 0, 1, 2, 2, 3, 3,
00627 };
00628
00629 static int read_sbr_grid(AACContext *ac, SpectralBandReplication *sbr,
00630 GetBitContext *gb, SBRData *ch_data)
00631 {
00632 int i;
00633 unsigned bs_pointer = 0;
00634
00635 int abs_bord_trail = 16;
00636 int num_rel_lead, num_rel_trail;
00637 unsigned bs_num_env_old = ch_data->bs_num_env;
00638
00639 ch_data->bs_freq_res[0] = ch_data->bs_freq_res[ch_data->bs_num_env];
00640 ch_data->bs_amp_res = sbr->bs_amp_res_header;
00641 ch_data->t_env_num_env_old = ch_data->t_env[bs_num_env_old];
00642
00643 switch (ch_data->bs_frame_class = get_bits(gb, 2)) {
00644 case FIXFIX:
00645 ch_data->bs_num_env = 1 << get_bits(gb, 2);
00646 num_rel_lead = ch_data->bs_num_env - 1;
00647 if (ch_data->bs_num_env == 1)
00648 ch_data->bs_amp_res = 0;
00649
00650 if (ch_data->bs_num_env > 4) {
00651 av_log(ac->avctx, AV_LOG_ERROR,
00652 "Invalid bitstream, too many SBR envelopes in FIXFIX type SBR frame: %d\n",
00653 ch_data->bs_num_env);
00654 return -1;
00655 }
00656
00657 ch_data->t_env[0] = 0;
00658 ch_data->t_env[ch_data->bs_num_env] = abs_bord_trail;
00659
00660 abs_bord_trail = (abs_bord_trail + (ch_data->bs_num_env >> 1)) /
00661 ch_data->bs_num_env;
00662 for (i = 0; i < num_rel_lead; i++)
00663 ch_data->t_env[i + 1] = ch_data->t_env[i] + abs_bord_trail;
00664
00665 ch_data->bs_freq_res[1] = get_bits1(gb);
00666 for (i = 1; i < ch_data->bs_num_env; i++)
00667 ch_data->bs_freq_res[i + 1] = ch_data->bs_freq_res[1];
00668 break;
00669 case FIXVAR:
00670 abs_bord_trail += get_bits(gb, 2);
00671 num_rel_trail = get_bits(gb, 2);
00672 ch_data->bs_num_env = num_rel_trail + 1;
00673 ch_data->t_env[0] = 0;
00674 ch_data->t_env[ch_data->bs_num_env] = abs_bord_trail;
00675
00676 for (i = 0; i < num_rel_trail; i++)
00677 ch_data->t_env[ch_data->bs_num_env - 1 - i] =
00678 ch_data->t_env[ch_data->bs_num_env - i] - 2 * get_bits(gb, 2) - 2;
00679
00680 bs_pointer = get_bits(gb, ceil_log2[ch_data->bs_num_env]);
00681
00682 for (i = 0; i < ch_data->bs_num_env; i++)
00683 ch_data->bs_freq_res[ch_data->bs_num_env - i] = get_bits1(gb);
00684 break;
00685 case VARFIX:
00686 ch_data->t_env[0] = get_bits(gb, 2);
00687 num_rel_lead = get_bits(gb, 2);
00688 ch_data->bs_num_env = num_rel_lead + 1;
00689 ch_data->t_env[ch_data->bs_num_env] = abs_bord_trail;
00690
00691 for (i = 0; i < num_rel_lead; i++)
00692 ch_data->t_env[i + 1] = ch_data->t_env[i] + 2 * get_bits(gb, 2) + 2;
00693
00694 bs_pointer = get_bits(gb, ceil_log2[ch_data->bs_num_env]);
00695
00696 get_bits1_vector(gb, ch_data->bs_freq_res + 1, ch_data->bs_num_env);
00697 break;
00698 case VARVAR:
00699 ch_data->t_env[0] = get_bits(gb, 2);
00700 abs_bord_trail += get_bits(gb, 2);
00701 num_rel_lead = get_bits(gb, 2);
00702 num_rel_trail = get_bits(gb, 2);
00703 ch_data->bs_num_env = num_rel_lead + num_rel_trail + 1;
00704
00705 if (ch_data->bs_num_env > 5) {
00706 av_log(ac->avctx, AV_LOG_ERROR,
00707 "Invalid bitstream, too many SBR envelopes in VARVAR type SBR frame: %d\n",
00708 ch_data->bs_num_env);
00709 return -1;
00710 }
00711
00712 ch_data->t_env[ch_data->bs_num_env] = abs_bord_trail;
00713
00714 for (i = 0; i < num_rel_lead; i++)
00715 ch_data->t_env[i + 1] = ch_data->t_env[i] + 2 * get_bits(gb, 2) + 2;
00716 for (i = 0; i < num_rel_trail; i++)
00717 ch_data->t_env[ch_data->bs_num_env - 1 - i] =
00718 ch_data->t_env[ch_data->bs_num_env - i] - 2 * get_bits(gb, 2) - 2;
00719
00720 bs_pointer = get_bits(gb, ceil_log2[ch_data->bs_num_env]);
00721
00722 get_bits1_vector(gb, ch_data->bs_freq_res + 1, ch_data->bs_num_env);
00723 break;
00724 }
00725
00726 if (bs_pointer > ch_data->bs_num_env + 1) {
00727 av_log(ac->avctx, AV_LOG_ERROR,
00728 "Invalid bitstream, bs_pointer points to a middle noise border outside the time borders table: %d\n",
00729 bs_pointer);
00730 return -1;
00731 }
00732
00733 for (i = 1; i <= ch_data->bs_num_env; i++) {
00734 if (ch_data->t_env[i-1] > ch_data->t_env[i]) {
00735 av_log(ac->avctx, AV_LOG_ERROR, "Non monotone time borders\n");
00736 return -1;
00737 }
00738 }
00739
00740 ch_data->bs_num_noise = (ch_data->bs_num_env > 1) + 1;
00741
00742 ch_data->t_q[0] = ch_data->t_env[0];
00743 ch_data->t_q[ch_data->bs_num_noise] = ch_data->t_env[ch_data->bs_num_env];
00744 if (ch_data->bs_num_noise > 1) {
00745 unsigned int idx;
00746 if (ch_data->bs_frame_class == FIXFIX) {
00747 idx = ch_data->bs_num_env >> 1;
00748 } else if (ch_data->bs_frame_class & 1) {
00749 idx = ch_data->bs_num_env - FFMAX((int)bs_pointer - 1, 1);
00750 } else {
00751 if (!bs_pointer)
00752 idx = 1;
00753 else if (bs_pointer == 1)
00754 idx = ch_data->bs_num_env - 1;
00755 else
00756 idx = bs_pointer - 1;
00757 }
00758 ch_data->t_q[1] = ch_data->t_env[idx];
00759 }
00760
00761 ch_data->e_a[0] = -(ch_data->e_a[1] != bs_num_env_old);
00762 ch_data->e_a[1] = -1;
00763 if ((ch_data->bs_frame_class & 1) && bs_pointer) {
00764 ch_data->e_a[1] = ch_data->bs_num_env + 1 - bs_pointer;
00765 } else if ((ch_data->bs_frame_class == 2) && (bs_pointer > 1))
00766 ch_data->e_a[1] = bs_pointer - 1;
00767
00768 return 0;
00769 }
00770
00771 static void copy_sbr_grid(SBRData *dst, const SBRData *src) {
00772
00773 dst->bs_freq_res[0] = dst->bs_freq_res[dst->bs_num_env];
00774 dst->t_env_num_env_old = dst->t_env[dst->bs_num_env];
00775 dst->e_a[0] = -(dst->e_a[1] != dst->bs_num_env);
00776
00777
00778 memcpy(dst->bs_freq_res+1, src->bs_freq_res+1, sizeof(dst->bs_freq_res)-sizeof(*dst->bs_freq_res));
00779 memcpy(dst->t_env, src->t_env, sizeof(dst->t_env));
00780 memcpy(dst->t_q, src->t_q, sizeof(dst->t_q));
00781 dst->bs_num_env = src->bs_num_env;
00782 dst->bs_amp_res = src->bs_amp_res;
00783 dst->bs_num_noise = src->bs_num_noise;
00784 dst->bs_frame_class = src->bs_frame_class;
00785 dst->e_a[1] = src->e_a[1];
00786 }
00787
00789 static void read_sbr_dtdf(SpectralBandReplication *sbr, GetBitContext *gb,
00790 SBRData *ch_data)
00791 {
00792 get_bits1_vector(gb, ch_data->bs_df_env, ch_data->bs_num_env);
00793 get_bits1_vector(gb, ch_data->bs_df_noise, ch_data->bs_num_noise);
00794 }
00795
00797 static void read_sbr_invf(SpectralBandReplication *sbr, GetBitContext *gb,
00798 SBRData *ch_data)
00799 {
00800 int i;
00801
00802 memcpy(ch_data->bs_invf_mode[1], ch_data->bs_invf_mode[0], 5 * sizeof(uint8_t));
00803 for (i = 0; i < sbr->n_q; i++)
00804 ch_data->bs_invf_mode[0][i] = get_bits(gb, 2);
00805 }
00806
00807 static void read_sbr_envelope(SpectralBandReplication *sbr, GetBitContext *gb,
00808 SBRData *ch_data, int ch)
00809 {
00810 int bits;
00811 int i, j, k;
00812 VLC_TYPE (*t_huff)[2], (*f_huff)[2];
00813 int t_lav, f_lav;
00814 const int delta = (ch == 1 && sbr->bs_coupling == 1) + 1;
00815 const int odd = sbr->n[1] & 1;
00816
00817 if (sbr->bs_coupling && ch) {
00818 if (ch_data->bs_amp_res) {
00819 bits = 5;
00820 t_huff = vlc_sbr[T_HUFFMAN_ENV_BAL_3_0DB].table;
00821 t_lav = vlc_sbr_lav[T_HUFFMAN_ENV_BAL_3_0DB];
00822 f_huff = vlc_sbr[F_HUFFMAN_ENV_BAL_3_0DB].table;
00823 f_lav = vlc_sbr_lav[F_HUFFMAN_ENV_BAL_3_0DB];
00824 } else {
00825 bits = 6;
00826 t_huff = vlc_sbr[T_HUFFMAN_ENV_BAL_1_5DB].table;
00827 t_lav = vlc_sbr_lav[T_HUFFMAN_ENV_BAL_1_5DB];
00828 f_huff = vlc_sbr[F_HUFFMAN_ENV_BAL_1_5DB].table;
00829 f_lav = vlc_sbr_lav[F_HUFFMAN_ENV_BAL_1_5DB];
00830 }
00831 } else {
00832 if (ch_data->bs_amp_res) {
00833 bits = 6;
00834 t_huff = vlc_sbr[T_HUFFMAN_ENV_3_0DB].table;
00835 t_lav = vlc_sbr_lav[T_HUFFMAN_ENV_3_0DB];
00836 f_huff = vlc_sbr[F_HUFFMAN_ENV_3_0DB].table;
00837 f_lav = vlc_sbr_lav[F_HUFFMAN_ENV_3_0DB];
00838 } else {
00839 bits = 7;
00840 t_huff = vlc_sbr[T_HUFFMAN_ENV_1_5DB].table;
00841 t_lav = vlc_sbr_lav[T_HUFFMAN_ENV_1_5DB];
00842 f_huff = vlc_sbr[F_HUFFMAN_ENV_1_5DB].table;
00843 f_lav = vlc_sbr_lav[F_HUFFMAN_ENV_1_5DB];
00844 }
00845 }
00846
00847 for (i = 0; i < ch_data->bs_num_env; i++) {
00848 if (ch_data->bs_df_env[i]) {
00849
00850 if (ch_data->bs_freq_res[i + 1] == ch_data->bs_freq_res[i]) {
00851 for (j = 0; j < sbr->n[ch_data->bs_freq_res[i + 1]]; j++)
00852 ch_data->env_facs[i + 1][j] = ch_data->env_facs[i][j] + delta * (get_vlc2(gb, t_huff, 9, 3) - t_lav);
00853 } else if (ch_data->bs_freq_res[i + 1]) {
00854 for (j = 0; j < sbr->n[ch_data->bs_freq_res[i + 1]]; j++) {
00855 k = (j + odd) >> 1;
00856 ch_data->env_facs[i + 1][j] = ch_data->env_facs[i][k] + delta * (get_vlc2(gb, t_huff, 9, 3) - t_lav);
00857 }
00858 } else {
00859 for (j = 0; j < sbr->n[ch_data->bs_freq_res[i + 1]]; j++) {
00860 k = j ? 2*j - odd : 0;
00861 ch_data->env_facs[i + 1][j] = ch_data->env_facs[i][k] + delta * (get_vlc2(gb, t_huff, 9, 3) - t_lav);
00862 }
00863 }
00864 } else {
00865 ch_data->env_facs[i + 1][0] = delta * get_bits(gb, bits);
00866 for (j = 1; j < sbr->n[ch_data->bs_freq_res[i + 1]]; j++)
00867 ch_data->env_facs[i + 1][j] = ch_data->env_facs[i + 1][j - 1] + delta * (get_vlc2(gb, f_huff, 9, 3) - f_lav);
00868 }
00869 }
00870
00871
00872 memcpy(ch_data->env_facs[0], ch_data->env_facs[ch_data->bs_num_env],
00873 sizeof(ch_data->env_facs[0]));
00874 }
00875
00876 static void read_sbr_noise(SpectralBandReplication *sbr, GetBitContext *gb,
00877 SBRData *ch_data, int ch)
00878 {
00879 int i, j;
00880 VLC_TYPE (*t_huff)[2], (*f_huff)[2];
00881 int t_lav, f_lav;
00882 int delta = (ch == 1 && sbr->bs_coupling == 1) + 1;
00883
00884 if (sbr->bs_coupling && ch) {
00885 t_huff = vlc_sbr[T_HUFFMAN_NOISE_BAL_3_0DB].table;
00886 t_lav = vlc_sbr_lav[T_HUFFMAN_NOISE_BAL_3_0DB];
00887 f_huff = vlc_sbr[F_HUFFMAN_ENV_BAL_3_0DB].table;
00888 f_lav = vlc_sbr_lav[F_HUFFMAN_ENV_BAL_3_0DB];
00889 } else {
00890 t_huff = vlc_sbr[T_HUFFMAN_NOISE_3_0DB].table;
00891 t_lav = vlc_sbr_lav[T_HUFFMAN_NOISE_3_0DB];
00892 f_huff = vlc_sbr[F_HUFFMAN_ENV_3_0DB].table;
00893 f_lav = vlc_sbr_lav[F_HUFFMAN_ENV_3_0DB];
00894 }
00895
00896 for (i = 0; i < ch_data->bs_num_noise; i++) {
00897 if (ch_data->bs_df_noise[i]) {
00898 for (j = 0; j < sbr->n_q; j++)
00899 ch_data->noise_facs[i + 1][j] = ch_data->noise_facs[i][j] + delta * (get_vlc2(gb, t_huff, 9, 2) - t_lav);
00900 } else {
00901 ch_data->noise_facs[i + 1][0] = delta * get_bits(gb, 5);
00902 for (j = 1; j < sbr->n_q; j++)
00903 ch_data->noise_facs[i + 1][j] = ch_data->noise_facs[i + 1][j - 1] + delta * (get_vlc2(gb, f_huff, 9, 3) - f_lav);
00904 }
00905 }
00906
00907
00908 memcpy(ch_data->noise_facs[0], ch_data->noise_facs[ch_data->bs_num_noise],
00909 sizeof(ch_data->noise_facs[0]));
00910 }
00911
00912 static void read_sbr_extension(AACContext *ac, SpectralBandReplication *sbr,
00913 GetBitContext *gb,
00914 int bs_extension_id, int *num_bits_left)
00915 {
00916 switch (bs_extension_id) {
00917 case EXTENSION_ID_PS:
00918 if (!ac->oc[1].m4ac.ps) {
00919 av_log(ac->avctx, AV_LOG_ERROR, "Parametric Stereo signaled to be not-present but was found in the bitstream.\n");
00920 skip_bits_long(gb, *num_bits_left);
00921 *num_bits_left = 0;
00922 } else {
00923 #if 1
00924 *num_bits_left -= ff_ps_read_data(ac->avctx, gb, &sbr->ps, *num_bits_left);
00925 #else
00926 av_log_missing_feature(ac->avctx, "Parametric Stereo", 0);
00927 skip_bits_long(gb, *num_bits_left);
00928 *num_bits_left = 0;
00929 #endif
00930 }
00931 break;
00932 default:
00933
00934 if (bs_extension_id || *num_bits_left > 16 || show_bits(gb, *num_bits_left))
00935 av_log_missing_feature(ac->avctx, "Reserved SBR extensions", 1);
00936 skip_bits_long(gb, *num_bits_left);
00937 *num_bits_left = 0;
00938 break;
00939 }
00940 }
00941
00942 static int read_sbr_single_channel_element(AACContext *ac,
00943 SpectralBandReplication *sbr,
00944 GetBitContext *gb)
00945 {
00946 if (get_bits1(gb))
00947 skip_bits(gb, 4);
00948
00949 if (read_sbr_grid(ac, sbr, gb, &sbr->data[0]))
00950 return -1;
00951 read_sbr_dtdf(sbr, gb, &sbr->data[0]);
00952 read_sbr_invf(sbr, gb, &sbr->data[0]);
00953 read_sbr_envelope(sbr, gb, &sbr->data[0], 0);
00954 read_sbr_noise(sbr, gb, &sbr->data[0], 0);
00955
00956 if ((sbr->data[0].bs_add_harmonic_flag = get_bits1(gb)))
00957 get_bits1_vector(gb, sbr->data[0].bs_add_harmonic, sbr->n[1]);
00958
00959 return 0;
00960 }
00961
00962 static int read_sbr_channel_pair_element(AACContext *ac,
00963 SpectralBandReplication *sbr,
00964 GetBitContext *gb)
00965 {
00966 if (get_bits1(gb))
00967 skip_bits(gb, 8);
00968
00969 if ((sbr->bs_coupling = get_bits1(gb))) {
00970 if (read_sbr_grid(ac, sbr, gb, &sbr->data[0]))
00971 return -1;
00972 copy_sbr_grid(&sbr->data[1], &sbr->data[0]);
00973 read_sbr_dtdf(sbr, gb, &sbr->data[0]);
00974 read_sbr_dtdf(sbr, gb, &sbr->data[1]);
00975 read_sbr_invf(sbr, gb, &sbr->data[0]);
00976 memcpy(sbr->data[1].bs_invf_mode[1], sbr->data[1].bs_invf_mode[0], sizeof(sbr->data[1].bs_invf_mode[0]));
00977 memcpy(sbr->data[1].bs_invf_mode[0], sbr->data[0].bs_invf_mode[0], sizeof(sbr->data[1].bs_invf_mode[0]));
00978 read_sbr_envelope(sbr, gb, &sbr->data[0], 0);
00979 read_sbr_noise(sbr, gb, &sbr->data[0], 0);
00980 read_sbr_envelope(sbr, gb, &sbr->data[1], 1);
00981 read_sbr_noise(sbr, gb, &sbr->data[1], 1);
00982 } else {
00983 if (read_sbr_grid(ac, sbr, gb, &sbr->data[0]) ||
00984 read_sbr_grid(ac, sbr, gb, &sbr->data[1]))
00985 return -1;
00986 read_sbr_dtdf(sbr, gb, &sbr->data[0]);
00987 read_sbr_dtdf(sbr, gb, &sbr->data[1]);
00988 read_sbr_invf(sbr, gb, &sbr->data[0]);
00989 read_sbr_invf(sbr, gb, &sbr->data[1]);
00990 read_sbr_envelope(sbr, gb, &sbr->data[0], 0);
00991 read_sbr_envelope(sbr, gb, &sbr->data[1], 1);
00992 read_sbr_noise(sbr, gb, &sbr->data[0], 0);
00993 read_sbr_noise(sbr, gb, &sbr->data[1], 1);
00994 }
00995
00996 if ((sbr->data[0].bs_add_harmonic_flag = get_bits1(gb)))
00997 get_bits1_vector(gb, sbr->data[0].bs_add_harmonic, sbr->n[1]);
00998 if ((sbr->data[1].bs_add_harmonic_flag = get_bits1(gb)))
00999 get_bits1_vector(gb, sbr->data[1].bs_add_harmonic, sbr->n[1]);
01000
01001 return 0;
01002 }
01003
01004 static unsigned int read_sbr_data(AACContext *ac, SpectralBandReplication *sbr,
01005 GetBitContext *gb, int id_aac)
01006 {
01007 unsigned int cnt = get_bits_count(gb);
01008
01009 if (id_aac == TYPE_SCE || id_aac == TYPE_CCE) {
01010 if (read_sbr_single_channel_element(ac, sbr, gb)) {
01011 sbr_turnoff(sbr);
01012 return get_bits_count(gb) - cnt;
01013 }
01014 } else if (id_aac == TYPE_CPE) {
01015 if (read_sbr_channel_pair_element(ac, sbr, gb)) {
01016 sbr_turnoff(sbr);
01017 return get_bits_count(gb) - cnt;
01018 }
01019 } else {
01020 av_log(ac->avctx, AV_LOG_ERROR,
01021 "Invalid bitstream - cannot apply SBR to element type %d\n", id_aac);
01022 sbr_turnoff(sbr);
01023 return get_bits_count(gb) - cnt;
01024 }
01025 if (get_bits1(gb)) {
01026 int num_bits_left = get_bits(gb, 4);
01027 if (num_bits_left == 15)
01028 num_bits_left += get_bits(gb, 8);
01029
01030 num_bits_left <<= 3;
01031 while (num_bits_left > 7) {
01032 num_bits_left -= 2;
01033 read_sbr_extension(ac, sbr, gb, get_bits(gb, 2), &num_bits_left);
01034 }
01035 if (num_bits_left < 0) {
01036 av_log(ac->avctx, AV_LOG_ERROR, "SBR Extension over read.\n");
01037 }
01038 if (num_bits_left > 0)
01039 skip_bits(gb, num_bits_left);
01040 }
01041
01042 return get_bits_count(gb) - cnt;
01043 }
01044
01045 static void sbr_reset(AACContext *ac, SpectralBandReplication *sbr)
01046 {
01047 int err;
01048 err = sbr_make_f_master(ac, sbr, &sbr->spectrum_params);
01049 if (err >= 0)
01050 err = sbr_make_f_derived(ac, sbr);
01051 if (err < 0) {
01052 av_log(ac->avctx, AV_LOG_ERROR,
01053 "SBR reset failed. Switching SBR to pure upsampling mode.\n");
01054 sbr_turnoff(sbr);
01055 }
01056 }
01057
01066 int ff_decode_sbr_extension(AACContext *ac, SpectralBandReplication *sbr,
01067 GetBitContext *gb_host, int crc, int cnt, int id_aac)
01068 {
01069 unsigned int num_sbr_bits = 0, num_align_bits;
01070 unsigned bytes_read;
01071 GetBitContext gbc = *gb_host, *gb = &gbc;
01072 skip_bits_long(gb_host, cnt*8 - 4);
01073
01074 sbr->reset = 0;
01075
01076 if (!sbr->sample_rate)
01077 sbr->sample_rate = 2 * ac->oc[1].m4ac.sample_rate;
01078 if (!ac->oc[1].m4ac.ext_sample_rate)
01079 ac->oc[1].m4ac.ext_sample_rate = 2 * ac->oc[1].m4ac.sample_rate;
01080
01081 if (crc) {
01082 skip_bits(gb, 10);
01083 num_sbr_bits += 10;
01084 }
01085
01086
01087 sbr->kx[0] = sbr->kx[1];
01088 sbr->m[0] = sbr->m[1];
01089 sbr->kx_and_m_pushed = 1;
01090
01091 num_sbr_bits++;
01092 if (get_bits1(gb))
01093 num_sbr_bits += read_sbr_header(sbr, gb);
01094
01095 if (sbr->reset)
01096 sbr_reset(ac, sbr);
01097
01098 if (sbr->start)
01099 num_sbr_bits += read_sbr_data(ac, sbr, gb, id_aac);
01100
01101 num_align_bits = ((cnt << 3) - 4 - num_sbr_bits) & 7;
01102 bytes_read = ((num_sbr_bits + num_align_bits + 4) >> 3);
01103
01104 if (bytes_read > cnt) {
01105 av_log(ac->avctx, AV_LOG_ERROR,
01106 "Expected to read %d SBR bytes actually read %d.\n", cnt, bytes_read);
01107 }
01108 return cnt;
01109 }
01110
01112 static void sbr_dequant(SpectralBandReplication *sbr, int id_aac)
01113 {
01114 int k, e;
01115 int ch;
01116
01117 if (id_aac == TYPE_CPE && sbr->bs_coupling) {
01118 float alpha = sbr->data[0].bs_amp_res ? 1.0f : 0.5f;
01119 float pan_offset = sbr->data[0].bs_amp_res ? 12.0f : 24.0f;
01120 for (e = 1; e <= sbr->data[0].bs_num_env; e++) {
01121 for (k = 0; k < sbr->n[sbr->data[0].bs_freq_res[e]]; k++) {
01122 float temp1 = exp2f(sbr->data[0].env_facs[e][k] * alpha + 7.0f);
01123 float temp2 = exp2f((pan_offset - sbr->data[1].env_facs[e][k]) * alpha);
01124 float fac = temp1 / (1.0f + temp2);
01125 sbr->data[0].env_facs[e][k] = fac;
01126 sbr->data[1].env_facs[e][k] = fac * temp2;
01127 }
01128 }
01129 for (e = 1; e <= sbr->data[0].bs_num_noise; e++) {
01130 for (k = 0; k < sbr->n_q; k++) {
01131 float temp1 = exp2f(NOISE_FLOOR_OFFSET - sbr->data[0].noise_facs[e][k] + 1);
01132 float temp2 = exp2f(12 - sbr->data[1].noise_facs[e][k]);
01133 float fac = temp1 / (1.0f + temp2);
01134 sbr->data[0].noise_facs[e][k] = fac;
01135 sbr->data[1].noise_facs[e][k] = fac * temp2;
01136 }
01137 }
01138 } else {
01139 for (ch = 0; ch < (id_aac == TYPE_CPE) + 1; ch++) {
01140 float alpha = sbr->data[ch].bs_amp_res ? 1.0f : 0.5f;
01141 for (e = 1; e <= sbr->data[ch].bs_num_env; e++)
01142 for (k = 0; k < sbr->n[sbr->data[ch].bs_freq_res[e]]; k++)
01143 sbr->data[ch].env_facs[e][k] =
01144 exp2f(alpha * sbr->data[ch].env_facs[e][k] + 6.0f);
01145 for (e = 1; e <= sbr->data[ch].bs_num_noise; e++)
01146 for (k = 0; k < sbr->n_q; k++)
01147 sbr->data[ch].noise_facs[e][k] =
01148 exp2f(NOISE_FLOOR_OFFSET - sbr->data[ch].noise_facs[e][k]);
01149 }
01150 }
01151 }
01152
01159 static void sbr_qmf_analysis(DSPContext *dsp, FFTContext *mdct,
01160 SBRDSPContext *sbrdsp, const float *in, float *x,
01161 float z[320], float W[2][32][32][2], int buf_idx)
01162 {
01163 int i;
01164 memcpy(x , x+1024, (320-32)*sizeof(x[0]));
01165 memcpy(x+288, in, 1024*sizeof(x[0]));
01166 for (i = 0; i < 32; i++) {
01167
01168 dsp->vector_fmul_reverse(z, sbr_qmf_window_ds, x, 320);
01169 sbrdsp->sum64x5(z);
01170 sbrdsp->qmf_pre_shuffle(z);
01171 mdct->imdct_half(mdct, z, z+64);
01172 sbrdsp->qmf_post_shuffle(W[buf_idx][i], z);
01173 x += 32;
01174 }
01175 }
01176
01181 static void sbr_qmf_synthesis(DSPContext *dsp, FFTContext *mdct,
01182 SBRDSPContext *sbrdsp, AVFloatDSPContext *fdsp,
01183 float *out, float X[2][38][64],
01184 float mdct_buf[2][64],
01185 float *v0, int *v_off, const unsigned int div)
01186 {
01187 int i, n;
01188 const float *sbr_qmf_window = div ? sbr_qmf_window_ds : sbr_qmf_window_us;
01189 const int step = 128 >> div;
01190 float *v;
01191 for (i = 0; i < 32; i++) {
01192 if (*v_off < step) {
01193 int saved_samples = (1280 - 128) >> div;
01194 memcpy(&v0[SBR_SYNTHESIS_BUF_SIZE - saved_samples], v0, saved_samples * sizeof(float));
01195 *v_off = SBR_SYNTHESIS_BUF_SIZE - saved_samples - step;
01196 } else {
01197 *v_off -= step;
01198 }
01199 v = v0 + *v_off;
01200 if (div) {
01201 for (n = 0; n < 32; n++) {
01202 X[0][i][ n] = -X[0][i][n];
01203 X[0][i][32+n] = X[1][i][31-n];
01204 }
01205 mdct->imdct_half(mdct, mdct_buf[0], X[0][i]);
01206 sbrdsp->qmf_deint_neg(v, mdct_buf[0]);
01207 } else {
01208 sbrdsp->neg_odd_64(X[1][i]);
01209 mdct->imdct_half(mdct, mdct_buf[0], X[0][i]);
01210 mdct->imdct_half(mdct, mdct_buf[1], X[1][i]);
01211 sbrdsp->qmf_deint_bfly(v, mdct_buf[1], mdct_buf[0]);
01212 }
01213 fdsp->vector_fmul (out, v , sbr_qmf_window , 64 >> div);
01214 dsp->vector_fmul_add(out, v + ( 192 >> div), sbr_qmf_window + ( 64 >> div), out , 64 >> div);
01215 dsp->vector_fmul_add(out, v + ( 256 >> div), sbr_qmf_window + (128 >> div), out , 64 >> div);
01216 dsp->vector_fmul_add(out, v + ( 448 >> div), sbr_qmf_window + (192 >> div), out , 64 >> div);
01217 dsp->vector_fmul_add(out, v + ( 512 >> div), sbr_qmf_window + (256 >> div), out , 64 >> div);
01218 dsp->vector_fmul_add(out, v + ( 704 >> div), sbr_qmf_window + (320 >> div), out , 64 >> div);
01219 dsp->vector_fmul_add(out, v + ( 768 >> div), sbr_qmf_window + (384 >> div), out , 64 >> div);
01220 dsp->vector_fmul_add(out, v + ( 960 >> div), sbr_qmf_window + (448 >> div), out , 64 >> div);
01221 dsp->vector_fmul_add(out, v + (1024 >> div), sbr_qmf_window + (512 >> div), out , 64 >> div);
01222 dsp->vector_fmul_add(out, v + (1216 >> div), sbr_qmf_window + (576 >> div), out , 64 >> div);
01223 out += 64 >> div;
01224 }
01225 }
01226
01231 static void sbr_hf_inverse_filter(SBRDSPContext *dsp,
01232 float (*alpha0)[2], float (*alpha1)[2],
01233 const float X_low[32][40][2], int k0)
01234 {
01235 int k;
01236 for (k = 0; k < k0; k++) {
01237 LOCAL_ALIGNED_16(float, phi, [3], [2][2]);
01238 float dk;
01239
01240 dsp->autocorrelate(X_low[k], phi);
01241
01242 dk = phi[2][1][0] * phi[1][0][0] -
01243 (phi[1][1][0] * phi[1][1][0] + phi[1][1][1] * phi[1][1][1]) / 1.000001f;
01244
01245 if (!dk) {
01246 alpha1[k][0] = 0;
01247 alpha1[k][1] = 0;
01248 } else {
01249 float temp_real, temp_im;
01250 temp_real = phi[0][0][0] * phi[1][1][0] -
01251 phi[0][0][1] * phi[1][1][1] -
01252 phi[0][1][0] * phi[1][0][0];
01253 temp_im = phi[0][0][0] * phi[1][1][1] +
01254 phi[0][0][1] * phi[1][1][0] -
01255 phi[0][1][1] * phi[1][0][0];
01256
01257 alpha1[k][0] = temp_real / dk;
01258 alpha1[k][1] = temp_im / dk;
01259 }
01260
01261 if (!phi[1][0][0]) {
01262 alpha0[k][0] = 0;
01263 alpha0[k][1] = 0;
01264 } else {
01265 float temp_real, temp_im;
01266 temp_real = phi[0][0][0] + alpha1[k][0] * phi[1][1][0] +
01267 alpha1[k][1] * phi[1][1][1];
01268 temp_im = phi[0][0][1] + alpha1[k][1] * phi[1][1][0] -
01269 alpha1[k][0] * phi[1][1][1];
01270
01271 alpha0[k][0] = -temp_real / phi[1][0][0];
01272 alpha0[k][1] = -temp_im / phi[1][0][0];
01273 }
01274
01275 if (alpha1[k][0] * alpha1[k][0] + alpha1[k][1] * alpha1[k][1] >= 16.0f ||
01276 alpha0[k][0] * alpha0[k][0] + alpha0[k][1] * alpha0[k][1] >= 16.0f) {
01277 alpha1[k][0] = 0;
01278 alpha1[k][1] = 0;
01279 alpha0[k][0] = 0;
01280 alpha0[k][1] = 0;
01281 }
01282 }
01283 }
01284
01286 static void sbr_chirp(SpectralBandReplication *sbr, SBRData *ch_data)
01287 {
01288 int i;
01289 float new_bw;
01290 static const float bw_tab[] = { 0.0f, 0.75f, 0.9f, 0.98f };
01291
01292 for (i = 0; i < sbr->n_q; i++) {
01293 if (ch_data->bs_invf_mode[0][i] + ch_data->bs_invf_mode[1][i] == 1) {
01294 new_bw = 0.6f;
01295 } else
01296 new_bw = bw_tab[ch_data->bs_invf_mode[0][i]];
01297
01298 if (new_bw < ch_data->bw_array[i]) {
01299 new_bw = 0.75f * new_bw + 0.25f * ch_data->bw_array[i];
01300 } else
01301 new_bw = 0.90625f * new_bw + 0.09375f * ch_data->bw_array[i];
01302 ch_data->bw_array[i] = new_bw < 0.015625f ? 0.0f : new_bw;
01303 }
01304 }
01305
01307 static int sbr_lf_gen(AACContext *ac, SpectralBandReplication *sbr,
01308 float X_low[32][40][2], const float W[2][32][32][2],
01309 int buf_idx)
01310 {
01311 int i, k;
01312 const int t_HFGen = 8;
01313 const int i_f = 32;
01314 memset(X_low, 0, 32*sizeof(*X_low));
01315 for (k = 0; k < sbr->kx[1]; k++) {
01316 for (i = t_HFGen; i < i_f + t_HFGen; i++) {
01317 X_low[k][i][0] = W[buf_idx][i - t_HFGen][k][0];
01318 X_low[k][i][1] = W[buf_idx][i - t_HFGen][k][1];
01319 }
01320 }
01321 buf_idx = 1-buf_idx;
01322 for (k = 0; k < sbr->kx[0]; k++) {
01323 for (i = 0; i < t_HFGen; i++) {
01324 X_low[k][i][0] = W[buf_idx][i + i_f - t_HFGen][k][0];
01325 X_low[k][i][1] = W[buf_idx][i + i_f - t_HFGen][k][1];
01326 }
01327 }
01328 return 0;
01329 }
01330
01332 static int sbr_hf_gen(AACContext *ac, SpectralBandReplication *sbr,
01333 float X_high[64][40][2], const float X_low[32][40][2],
01334 const float (*alpha0)[2], const float (*alpha1)[2],
01335 const float bw_array[5], const uint8_t *t_env,
01336 int bs_num_env)
01337 {
01338 int j, x;
01339 int g = 0;
01340 int k = sbr->kx[1];
01341 for (j = 0; j < sbr->num_patches; j++) {
01342 for (x = 0; x < sbr->patch_num_subbands[j]; x++, k++) {
01343 const int p = sbr->patch_start_subband[j] + x;
01344 while (g <= sbr->n_q && k >= sbr->f_tablenoise[g])
01345 g++;
01346 g--;
01347
01348 if (g < 0) {
01349 av_log(ac->avctx, AV_LOG_ERROR,
01350 "ERROR : no subband found for frequency %d\n", k);
01351 return -1;
01352 }
01353
01354 sbr->dsp.hf_gen(X_high[k] + ENVELOPE_ADJUSTMENT_OFFSET,
01355 X_low[p] + ENVELOPE_ADJUSTMENT_OFFSET,
01356 alpha0[p], alpha1[p], bw_array[g],
01357 2 * t_env[0], 2 * t_env[bs_num_env]);
01358 }
01359 }
01360 if (k < sbr->m[1] + sbr->kx[1])
01361 memset(X_high + k, 0, (sbr->m[1] + sbr->kx[1] - k) * sizeof(*X_high));
01362
01363 return 0;
01364 }
01365
01367 static int sbr_x_gen(SpectralBandReplication *sbr, float X[2][38][64],
01368 const float Y0[38][64][2], const float Y1[38][64][2],
01369 const float X_low[32][40][2], int ch)
01370 {
01371 int k, i;
01372 const int i_f = 32;
01373 const int i_Temp = FFMAX(2*sbr->data[ch].t_env_num_env_old - i_f, 0);
01374 memset(X, 0, 2*sizeof(*X));
01375 for (k = 0; k < sbr->kx[0]; k++) {
01376 for (i = 0; i < i_Temp; i++) {
01377 X[0][i][k] = X_low[k][i + ENVELOPE_ADJUSTMENT_OFFSET][0];
01378 X[1][i][k] = X_low[k][i + ENVELOPE_ADJUSTMENT_OFFSET][1];
01379 }
01380 }
01381 for (; k < sbr->kx[0] + sbr->m[0]; k++) {
01382 for (i = 0; i < i_Temp; i++) {
01383 X[0][i][k] = Y0[i + i_f][k][0];
01384 X[1][i][k] = Y0[i + i_f][k][1];
01385 }
01386 }
01387
01388 for (k = 0; k < sbr->kx[1]; k++) {
01389 for (i = i_Temp; i < 38; i++) {
01390 X[0][i][k] = X_low[k][i + ENVELOPE_ADJUSTMENT_OFFSET][0];
01391 X[1][i][k] = X_low[k][i + ENVELOPE_ADJUSTMENT_OFFSET][1];
01392 }
01393 }
01394 for (; k < sbr->kx[1] + sbr->m[1]; k++) {
01395 for (i = i_Temp; i < i_f; i++) {
01396 X[0][i][k] = Y1[i][k][0];
01397 X[1][i][k] = Y1[i][k][1];
01398 }
01399 }
01400 return 0;
01401 }
01402
01406 static int sbr_mapping(AACContext *ac, SpectralBandReplication *sbr,
01407 SBRData *ch_data, int e_a[2])
01408 {
01409 int e, i, m;
01410
01411 memset(ch_data->s_indexmapped[1], 0, 7*sizeof(ch_data->s_indexmapped[1]));
01412 for (e = 0; e < ch_data->bs_num_env; e++) {
01413 const unsigned int ilim = sbr->n[ch_data->bs_freq_res[e + 1]];
01414 uint16_t *table = ch_data->bs_freq_res[e + 1] ? sbr->f_tablehigh : sbr->f_tablelow;
01415 int k;
01416
01417 if (sbr->kx[1] != table[0]) {
01418 av_log(ac->avctx, AV_LOG_ERROR, "kx != f_table{high,low}[0]. "
01419 "Derived frequency tables were not regenerated.\n");
01420 sbr_turnoff(sbr);
01421 return AVERROR_BUG;
01422 }
01423 for (i = 0; i < ilim; i++)
01424 for (m = table[i]; m < table[i + 1]; m++)
01425 sbr->e_origmapped[e][m - sbr->kx[1]] = ch_data->env_facs[e+1][i];
01426
01427
01428 k = (ch_data->bs_num_noise > 1) && (ch_data->t_env[e] >= ch_data->t_q[1]);
01429 for (i = 0; i < sbr->n_q; i++)
01430 for (m = sbr->f_tablenoise[i]; m < sbr->f_tablenoise[i + 1]; m++)
01431 sbr->q_mapped[e][m - sbr->kx[1]] = ch_data->noise_facs[k+1][i];
01432
01433 for (i = 0; i < sbr->n[1]; i++) {
01434 if (ch_data->bs_add_harmonic_flag) {
01435 const unsigned int m_midpoint =
01436 (sbr->f_tablehigh[i] + sbr->f_tablehigh[i + 1]) >> 1;
01437
01438 ch_data->s_indexmapped[e + 1][m_midpoint - sbr->kx[1]] = ch_data->bs_add_harmonic[i] *
01439 (e >= e_a[1] || (ch_data->s_indexmapped[0][m_midpoint - sbr->kx[1]] == 1));
01440 }
01441 }
01442
01443 for (i = 0; i < ilim; i++) {
01444 int additional_sinusoid_present = 0;
01445 for (m = table[i]; m < table[i + 1]; m++) {
01446 if (ch_data->s_indexmapped[e + 1][m - sbr->kx[1]]) {
01447 additional_sinusoid_present = 1;
01448 break;
01449 }
01450 }
01451 memset(&sbr->s_mapped[e][table[i] - sbr->kx[1]], additional_sinusoid_present,
01452 (table[i + 1] - table[i]) * sizeof(sbr->s_mapped[e][0]));
01453 }
01454 }
01455
01456 memcpy(ch_data->s_indexmapped[0], ch_data->s_indexmapped[ch_data->bs_num_env], sizeof(ch_data->s_indexmapped[0]));
01457 return 0;
01458 }
01459
01461 static void sbr_env_estimate(float (*e_curr)[48], float X_high[64][40][2],
01462 SpectralBandReplication *sbr, SBRData *ch_data)
01463 {
01464 int e, m;
01465 int kx1 = sbr->kx[1];
01466
01467 if (sbr->bs_interpol_freq) {
01468 for (e = 0; e < ch_data->bs_num_env; e++) {
01469 const float recip_env_size = 0.5f / (ch_data->t_env[e + 1] - ch_data->t_env[e]);
01470 int ilb = ch_data->t_env[e] * 2 + ENVELOPE_ADJUSTMENT_OFFSET;
01471 int iub = ch_data->t_env[e + 1] * 2 + ENVELOPE_ADJUSTMENT_OFFSET;
01472
01473 for (m = 0; m < sbr->m[1]; m++) {
01474 float sum = sbr->dsp.sum_square(X_high[m+kx1] + ilb, iub - ilb);
01475 e_curr[e][m] = sum * recip_env_size;
01476 }
01477 }
01478 } else {
01479 int k, p;
01480
01481 for (e = 0; e < ch_data->bs_num_env; e++) {
01482 const int env_size = 2 * (ch_data->t_env[e + 1] - ch_data->t_env[e]);
01483 int ilb = ch_data->t_env[e] * 2 + ENVELOPE_ADJUSTMENT_OFFSET;
01484 int iub = ch_data->t_env[e + 1] * 2 + ENVELOPE_ADJUSTMENT_OFFSET;
01485 const uint16_t *table = ch_data->bs_freq_res[e + 1] ? sbr->f_tablehigh : sbr->f_tablelow;
01486
01487 for (p = 0; p < sbr->n[ch_data->bs_freq_res[e + 1]]; p++) {
01488 float sum = 0.0f;
01489 const int den = env_size * (table[p + 1] - table[p]);
01490
01491 for (k = table[p]; k < table[p + 1]; k++) {
01492 sum += sbr->dsp.sum_square(X_high[k] + ilb, iub - ilb);
01493 }
01494 sum /= den;
01495 for (k = table[p]; k < table[p + 1]; k++) {
01496 e_curr[e][k - kx1] = sum;
01497 }
01498 }
01499 }
01500 }
01501 }
01502
01507 static void sbr_gain_calc(AACContext *ac, SpectralBandReplication *sbr,
01508 SBRData *ch_data, const int e_a[2])
01509 {
01510 int e, k, m;
01511
01512 static const float limgain[4] = { 0.70795, 1.0, 1.41254, 10000000000 };
01513
01514 for (e = 0; e < ch_data->bs_num_env; e++) {
01515 int delta = !((e == e_a[1]) || (e == e_a[0]));
01516 for (k = 0; k < sbr->n_lim; k++) {
01517 float gain_boost, gain_max;
01518 float sum[2] = { 0.0f, 0.0f };
01519 for (m = sbr->f_tablelim[k] - sbr->kx[1]; m < sbr->f_tablelim[k + 1] - sbr->kx[1]; m++) {
01520 const float temp = sbr->e_origmapped[e][m] / (1.0f + sbr->q_mapped[e][m]);
01521 sbr->q_m[e][m] = sqrtf(temp * sbr->q_mapped[e][m]);
01522 sbr->s_m[e][m] = sqrtf(temp * ch_data->s_indexmapped[e + 1][m]);
01523 if (!sbr->s_mapped[e][m]) {
01524 sbr->gain[e][m] = sqrtf(sbr->e_origmapped[e][m] /
01525 ((1.0f + sbr->e_curr[e][m]) *
01526 (1.0f + sbr->q_mapped[e][m] * delta)));
01527 } else {
01528 sbr->gain[e][m] = sqrtf(sbr->e_origmapped[e][m] * sbr->q_mapped[e][m] /
01529 ((1.0f + sbr->e_curr[e][m]) *
01530 (1.0f + sbr->q_mapped[e][m])));
01531 }
01532 }
01533 for (m = sbr->f_tablelim[k] - sbr->kx[1]; m < sbr->f_tablelim[k + 1] - sbr->kx[1]; m++) {
01534 sum[0] += sbr->e_origmapped[e][m];
01535 sum[1] += sbr->e_curr[e][m];
01536 }
01537 gain_max = limgain[sbr->bs_limiter_gains] * sqrtf((FLT_EPSILON + sum[0]) / (FLT_EPSILON + sum[1]));
01538 gain_max = FFMIN(100000.f, gain_max);
01539 for (m = sbr->f_tablelim[k] - sbr->kx[1]; m < sbr->f_tablelim[k + 1] - sbr->kx[1]; m++) {
01540 float q_m_max = sbr->q_m[e][m] * gain_max / sbr->gain[e][m];
01541 sbr->q_m[e][m] = FFMIN(sbr->q_m[e][m], q_m_max);
01542 sbr->gain[e][m] = FFMIN(sbr->gain[e][m], gain_max);
01543 }
01544 sum[0] = sum[1] = 0.0f;
01545 for (m = sbr->f_tablelim[k] - sbr->kx[1]; m < sbr->f_tablelim[k + 1] - sbr->kx[1]; m++) {
01546 sum[0] += sbr->e_origmapped[e][m];
01547 sum[1] += sbr->e_curr[e][m] * sbr->gain[e][m] * sbr->gain[e][m]
01548 + sbr->s_m[e][m] * sbr->s_m[e][m]
01549 + (delta && !sbr->s_m[e][m]) * sbr->q_m[e][m] * sbr->q_m[e][m];
01550 }
01551 gain_boost = sqrtf((FLT_EPSILON + sum[0]) / (FLT_EPSILON + sum[1]));
01552 gain_boost = FFMIN(1.584893192f, gain_boost);
01553 for (m = sbr->f_tablelim[k] - sbr->kx[1]; m < sbr->f_tablelim[k + 1] - sbr->kx[1]; m++) {
01554 sbr->gain[e][m] *= gain_boost;
01555 sbr->q_m[e][m] *= gain_boost;
01556 sbr->s_m[e][m] *= gain_boost;
01557 }
01558 }
01559 }
01560 }
01561
01563 static void sbr_hf_assemble(float Y1[38][64][2],
01564 const float X_high[64][40][2],
01565 SpectralBandReplication *sbr, SBRData *ch_data,
01566 const int e_a[2])
01567 {
01568 int e, i, j, m;
01569 const int h_SL = 4 * !sbr->bs_smoothing_mode;
01570 const int kx = sbr->kx[1];
01571 const int m_max = sbr->m[1];
01572 static const float h_smooth[5] = {
01573 0.33333333333333,
01574 0.30150283239582,
01575 0.21816949906249,
01576 0.11516383427084,
01577 0.03183050093751,
01578 };
01579 float (*g_temp)[48] = ch_data->g_temp, (*q_temp)[48] = ch_data->q_temp;
01580 int indexnoise = ch_data->f_indexnoise;
01581 int indexsine = ch_data->f_indexsine;
01582
01583 if (sbr->reset) {
01584 for (i = 0; i < h_SL; i++) {
01585 memcpy(g_temp[i + 2*ch_data->t_env[0]], sbr->gain[0], m_max * sizeof(sbr->gain[0][0]));
01586 memcpy(q_temp[i + 2*ch_data->t_env[0]], sbr->q_m[0], m_max * sizeof(sbr->q_m[0][0]));
01587 }
01588 } else if (h_SL) {
01589 memcpy(g_temp[2*ch_data->t_env[0]], g_temp[2*ch_data->t_env_num_env_old], 4*sizeof(g_temp[0]));
01590 memcpy(q_temp[2*ch_data->t_env[0]], q_temp[2*ch_data->t_env_num_env_old], 4*sizeof(q_temp[0]));
01591 }
01592
01593 for (e = 0; e < ch_data->bs_num_env; e++) {
01594 for (i = 2 * ch_data->t_env[e]; i < 2 * ch_data->t_env[e + 1]; i++) {
01595 memcpy(g_temp[h_SL + i], sbr->gain[e], m_max * sizeof(sbr->gain[0][0]));
01596 memcpy(q_temp[h_SL + i], sbr->q_m[e], m_max * sizeof(sbr->q_m[0][0]));
01597 }
01598 }
01599
01600 for (e = 0; e < ch_data->bs_num_env; e++) {
01601 for (i = 2 * ch_data->t_env[e]; i < 2 * ch_data->t_env[e + 1]; i++) {
01602 LOCAL_ALIGNED_16(float, g_filt_tab, [48]);
01603 LOCAL_ALIGNED_16(float, q_filt_tab, [48]);
01604 float *g_filt, *q_filt;
01605
01606 if (h_SL && e != e_a[0] && e != e_a[1]) {
01607 g_filt = g_filt_tab;
01608 q_filt = q_filt_tab;
01609 for (m = 0; m < m_max; m++) {
01610 const int idx1 = i + h_SL;
01611 g_filt[m] = 0.0f;
01612 q_filt[m] = 0.0f;
01613 for (j = 0; j <= h_SL; j++) {
01614 g_filt[m] += g_temp[idx1 - j][m] * h_smooth[j];
01615 q_filt[m] += q_temp[idx1 - j][m] * h_smooth[j];
01616 }
01617 }
01618 } else {
01619 g_filt = g_temp[i + h_SL];
01620 q_filt = q_temp[i];
01621 }
01622
01623 sbr->dsp.hf_g_filt(Y1[i] + kx, X_high + kx, g_filt, m_max,
01624 i + ENVELOPE_ADJUSTMENT_OFFSET);
01625
01626 if (e != e_a[0] && e != e_a[1]) {
01627 sbr->dsp.hf_apply_noise[indexsine](Y1[i] + kx, sbr->s_m[e],
01628 q_filt, indexnoise,
01629 kx, m_max);
01630 } else {
01631 int idx = indexsine&1;
01632 int A = (1-((indexsine+(kx & 1))&2));
01633 int B = (A^(-idx)) + idx;
01634 float *out = &Y1[i][kx][idx];
01635 float *in = sbr->s_m[e];
01636 for (m = 0; m+1 < m_max; m+=2) {
01637 out[2*m ] += in[m ] * A;
01638 out[2*m+2] += in[m+1] * B;
01639 }
01640 if(m_max&1)
01641 out[2*m ] += in[m ] * A;
01642 }
01643 indexnoise = (indexnoise + m_max) & 0x1ff;
01644 indexsine = (indexsine + 1) & 3;
01645 }
01646 }
01647 ch_data->f_indexnoise = indexnoise;
01648 ch_data->f_indexsine = indexsine;
01649 }
01650
01651 void ff_sbr_apply(AACContext *ac, SpectralBandReplication *sbr, int id_aac,
01652 float* L, float* R)
01653 {
01654 int downsampled = ac->oc[1].m4ac.ext_sample_rate < sbr->sample_rate;
01655 int ch;
01656 int nch = (id_aac == TYPE_CPE) ? 2 : 1;
01657 int err;
01658
01659 if (!sbr->kx_and_m_pushed) {
01660 sbr->kx[0] = sbr->kx[1];
01661 sbr->m[0] = sbr->m[1];
01662 } else {
01663 sbr->kx_and_m_pushed = 0;
01664 }
01665
01666 if (sbr->start) {
01667 sbr_dequant(sbr, id_aac);
01668 }
01669 for (ch = 0; ch < nch; ch++) {
01670
01671 sbr_qmf_analysis(&ac->dsp, &sbr->mdct_ana, &sbr->dsp, ch ? R : L, sbr->data[ch].analysis_filterbank_samples,
01672 (float*)sbr->qmf_filter_scratch,
01673 sbr->data[ch].W, sbr->data[ch].Ypos);
01674 sbr_lf_gen(ac, sbr, sbr->X_low, sbr->data[ch].W, sbr->data[ch].Ypos);
01675 sbr->data[ch].Ypos ^= 1;
01676 if (sbr->start) {
01677 sbr_hf_inverse_filter(&sbr->dsp, sbr->alpha0, sbr->alpha1, sbr->X_low, sbr->k[0]);
01678 sbr_chirp(sbr, &sbr->data[ch]);
01679 sbr_hf_gen(ac, sbr, sbr->X_high, sbr->X_low, sbr->alpha0, sbr->alpha1,
01680 sbr->data[ch].bw_array, sbr->data[ch].t_env,
01681 sbr->data[ch].bs_num_env);
01682
01683
01684 err = sbr_mapping(ac, sbr, &sbr->data[ch], sbr->data[ch].e_a);
01685 if (!err) {
01686 sbr_env_estimate(sbr->e_curr, sbr->X_high, sbr, &sbr->data[ch]);
01687 sbr_gain_calc(ac, sbr, &sbr->data[ch], sbr->data[ch].e_a);
01688 sbr_hf_assemble(sbr->data[ch].Y[sbr->data[ch].Ypos],
01689 sbr->X_high, sbr, &sbr->data[ch],
01690 sbr->data[ch].e_a);
01691 }
01692 }
01693
01694
01695 sbr_x_gen(sbr, sbr->X[ch],
01696 sbr->data[ch].Y[1-sbr->data[ch].Ypos],
01697 sbr->data[ch].Y[ sbr->data[ch].Ypos],
01698 sbr->X_low, ch);
01699 }
01700
01701 if (ac->oc[1].m4ac.ps == 1) {
01702 if (sbr->ps.start) {
01703 ff_ps_apply(ac->avctx, &sbr->ps, sbr->X[0], sbr->X[1], sbr->kx[1] + sbr->m[1]);
01704 } else {
01705 memcpy(sbr->X[1], sbr->X[0], sizeof(sbr->X[0]));
01706 }
01707 nch = 2;
01708 }
01709
01710 sbr_qmf_synthesis(&ac->dsp, &sbr->mdct, &sbr->dsp, &ac->fdsp,
01711 L, sbr->X[0], sbr->qmf_filter_scratch,
01712 sbr->data[0].synthesis_filterbank_samples,
01713 &sbr->data[0].synthesis_filterbank_samples_offset,
01714 downsampled);
01715 if (nch == 2)
01716 sbr_qmf_synthesis(&ac->dsp, &sbr->mdct, &sbr->dsp, &ac->fdsp,
01717 R, sbr->X[1], sbr->qmf_filter_scratch,
01718 sbr->data[1].synthesis_filterbank_samples,
01719 &sbr->data[1].synthesis_filterbank_samples_offset,
01720 downsampled);
01721 }