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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 | * This file is part of FFmpeg. | |
7 | * | |
8 | * FFmpeg is free software; you can redistribute it and/or | |
9 | * modify it under the terms of the GNU Lesser General Public | |
10 | * License as published by the Free Software Foundation; either | |
11 | * version 2.1 of the License, or (at your option) any later version. | |
12 | * | |
13 | * FFmpeg is distributed in the hope that it will be useful, | |
14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
16 | * Lesser General Public License for more details. | |
17 | * | |
18 | * You should have received a copy of the GNU Lesser General Public | |
19 | * License along with FFmpeg; if not, write to the Free Software | |
20 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | |
21 | */ | |
22 | ||
23 | /** | |
24 | * @file | |
25 | * AAC Spectral Band Replication decoding functions | |
26 | * @author Robert Swain ( rob opendot cl ) | |
27 | */ | |
28 | ||
29 | #include "aac.h" | |
30 | #include "sbr.h" | |
31 | #include "aacsbr.h" | |
32 | #include "aacsbrdata.h" | |
33 | #include "aacsbr_tablegen.h" | |
34 | #include "fft.h" | |
35 | #include "aacps.h" | |
36 | #include "sbrdsp.h" | |
37 | #include "libavutil/internal.h" | |
38 | #include "libavutil/libm.h" | |
39 | #include "libavutil/avassert.h" | |
40 | ||
41 | #include <stdint.h> | |
42 | #include <float.h> | |
43 | #include <math.h> | |
44 | ||
45 | #define ENVELOPE_ADJUSTMENT_OFFSET 2 | |
46 | #define NOISE_FLOOR_OFFSET 6.0f | |
47 | ||
48 | #if ARCH_MIPS | |
49 | #include "mips/aacsbr_mips.h" | |
50 | #endif /* ARCH_MIPS */ | |
51 | ||
52 | /** | |
53 | * SBR VLC tables | |
54 | */ | |
55 | enum { | |
56 | T_HUFFMAN_ENV_1_5DB, | |
57 | F_HUFFMAN_ENV_1_5DB, | |
58 | T_HUFFMAN_ENV_BAL_1_5DB, | |
59 | F_HUFFMAN_ENV_BAL_1_5DB, | |
60 | T_HUFFMAN_ENV_3_0DB, | |
61 | F_HUFFMAN_ENV_3_0DB, | |
62 | T_HUFFMAN_ENV_BAL_3_0DB, | |
63 | F_HUFFMAN_ENV_BAL_3_0DB, | |
64 | T_HUFFMAN_NOISE_3_0DB, | |
65 | T_HUFFMAN_NOISE_BAL_3_0DB, | |
66 | }; | |
67 | ||
68 | /** | |
69 | * bs_frame_class - frame class of current SBR frame (14496-3 sp04 p98) | |
70 | */ | |
71 | enum { | |
72 | FIXFIX, | |
73 | FIXVAR, | |
74 | VARFIX, | |
75 | VARVAR, | |
76 | }; | |
77 | ||
78 | enum { | |
79 | EXTENSION_ID_PS = 2, | |
80 | }; | |
81 | ||
82 | static VLC vlc_sbr[10]; | |
83 | static const int8_t vlc_sbr_lav[10] = | |
84 | { 60, 60, 24, 24, 31, 31, 12, 12, 31, 12 }; | |
85 | ||
86 | #define SBR_INIT_VLC_STATIC(num, size) \ | |
87 | INIT_VLC_STATIC(&vlc_sbr[num], 9, sbr_tmp[num].table_size / sbr_tmp[num].elem_size, \ | |
88 | sbr_tmp[num].sbr_bits , 1, 1, \ | |
89 | sbr_tmp[num].sbr_codes, sbr_tmp[num].elem_size, sbr_tmp[num].elem_size, \ | |
90 | size) | |
91 | ||
92 | #define SBR_VLC_ROW(name) \ | |
93 | { name ## _codes, name ## _bits, sizeof(name ## _codes), sizeof(name ## _codes[0]) } | |
94 | ||
95 | static void aacsbr_func_ptr_init(AACSBRContext *c); | |
96 | ||
97 | av_cold void ff_aac_sbr_init(void) | |
98 | { | |
99 | static const struct { | |
100 | const void *sbr_codes, *sbr_bits; | |
101 | const unsigned int table_size, elem_size; | |
102 | } sbr_tmp[] = { | |
103 | SBR_VLC_ROW(t_huffman_env_1_5dB), | |
104 | SBR_VLC_ROW(f_huffman_env_1_5dB), | |
105 | SBR_VLC_ROW(t_huffman_env_bal_1_5dB), | |
106 | SBR_VLC_ROW(f_huffman_env_bal_1_5dB), | |
107 | SBR_VLC_ROW(t_huffman_env_3_0dB), | |
108 | SBR_VLC_ROW(f_huffman_env_3_0dB), | |
109 | SBR_VLC_ROW(t_huffman_env_bal_3_0dB), | |
110 | SBR_VLC_ROW(f_huffman_env_bal_3_0dB), | |
111 | SBR_VLC_ROW(t_huffman_noise_3_0dB), | |
112 | SBR_VLC_ROW(t_huffman_noise_bal_3_0dB), | |
113 | }; | |
114 | ||
115 | // SBR VLC table initialization | |
116 | SBR_INIT_VLC_STATIC(0, 1098); | |
117 | SBR_INIT_VLC_STATIC(1, 1092); | |
118 | SBR_INIT_VLC_STATIC(2, 768); | |
119 | SBR_INIT_VLC_STATIC(3, 1026); | |
120 | SBR_INIT_VLC_STATIC(4, 1058); | |
121 | SBR_INIT_VLC_STATIC(5, 1052); | |
122 | SBR_INIT_VLC_STATIC(6, 544); | |
123 | SBR_INIT_VLC_STATIC(7, 544); | |
124 | SBR_INIT_VLC_STATIC(8, 592); | |
125 | SBR_INIT_VLC_STATIC(9, 512); | |
126 | ||
127 | aacsbr_tableinit(); | |
128 | ||
129 | ff_ps_init(); | |
130 | } | |
131 | ||
132 | /** Places SBR in pure upsampling mode. */ | |
133 | static void sbr_turnoff(SpectralBandReplication *sbr) { | |
134 | sbr->start = 0; | |
135 | // Init defults used in pure upsampling mode | |
136 | sbr->kx[1] = 32; //Typo in spec, kx' inits to 32 | |
137 | sbr->m[1] = 0; | |
138 | // Reset values for first SBR header | |
139 | sbr->data[0].e_a[1] = sbr->data[1].e_a[1] = -1; | |
140 | memset(&sbr->spectrum_params, -1, sizeof(SpectrumParameters)); | |
141 | } | |
142 | ||
143 | av_cold void ff_aac_sbr_ctx_init(AACContext *ac, SpectralBandReplication *sbr) | |
144 | { | |
145 | if(sbr->mdct.mdct_bits) | |
146 | return; | |
147 | sbr->kx[0] = sbr->kx[1]; | |
148 | sbr_turnoff(sbr); | |
149 | sbr->data[0].synthesis_filterbank_samples_offset = SBR_SYNTHESIS_BUF_SIZE - (1280 - 128); | |
150 | sbr->data[1].synthesis_filterbank_samples_offset = SBR_SYNTHESIS_BUF_SIZE - (1280 - 128); | |
151 | /* SBR requires samples to be scaled to +/-32768.0 to work correctly. | |
152 | * mdct scale factors are adjusted to scale up from +/-1.0 at analysis | |
153 | * and scale back down at synthesis. */ | |
154 | ff_mdct_init(&sbr->mdct, 7, 1, 1.0 / (64 * 32768.0)); | |
155 | ff_mdct_init(&sbr->mdct_ana, 7, 1, -2.0 * 32768.0); | |
156 | ff_ps_ctx_init(&sbr->ps); | |
157 | ff_sbrdsp_init(&sbr->dsp); | |
158 | aacsbr_func_ptr_init(&sbr->c); | |
159 | } | |
160 | ||
161 | av_cold void ff_aac_sbr_ctx_close(SpectralBandReplication *sbr) | |
162 | { | |
163 | ff_mdct_end(&sbr->mdct); | |
164 | ff_mdct_end(&sbr->mdct_ana); | |
165 | } | |
166 | ||
167 | static int qsort_comparison_function_int16(const void *a, const void *b) | |
168 | { | |
169 | return *(const int16_t *)a - *(const int16_t *)b; | |
170 | } | |
171 | ||
172 | static inline int in_table_int16(const int16_t *table, int last_el, int16_t needle) | |
173 | { | |
174 | int i; | |
175 | for (i = 0; i <= last_el; i++) | |
176 | if (table[i] == needle) | |
177 | return 1; | |
178 | return 0; | |
179 | } | |
180 | ||
181 | /// Limiter Frequency Band Table (14496-3 sp04 p198) | |
182 | static void sbr_make_f_tablelim(SpectralBandReplication *sbr) | |
183 | { | |
184 | int k; | |
185 | if (sbr->bs_limiter_bands > 0) { | |
186 | static const float bands_warped[3] = { 1.32715174233856803909f, //2^(0.49/1.2) | |
187 | 1.18509277094158210129f, //2^(0.49/2) | |
188 | 1.11987160404675912501f }; //2^(0.49/3) | |
189 | const float lim_bands_per_octave_warped = bands_warped[sbr->bs_limiter_bands - 1]; | |
190 | int16_t patch_borders[7]; | |
191 | uint16_t *in = sbr->f_tablelim + 1, *out = sbr->f_tablelim; | |
192 | ||
193 | patch_borders[0] = sbr->kx[1]; | |
194 | for (k = 1; k <= sbr->num_patches; k++) | |
195 | patch_borders[k] = patch_borders[k-1] + sbr->patch_num_subbands[k-1]; | |
196 | ||
197 | memcpy(sbr->f_tablelim, sbr->f_tablelow, | |
198 | (sbr->n[0] + 1) * sizeof(sbr->f_tablelow[0])); | |
199 | if (sbr->num_patches > 1) | |
200 | memcpy(sbr->f_tablelim + sbr->n[0] + 1, patch_borders + 1, | |
201 | (sbr->num_patches - 1) * sizeof(patch_borders[0])); | |
202 | ||
203 | qsort(sbr->f_tablelim, sbr->num_patches + sbr->n[0], | |
204 | sizeof(sbr->f_tablelim[0]), | |
205 | qsort_comparison_function_int16); | |
206 | ||
207 | sbr->n_lim = sbr->n[0] + sbr->num_patches - 1; | |
208 | while (out < sbr->f_tablelim + sbr->n_lim) { | |
209 | if (*in >= *out * lim_bands_per_octave_warped) { | |
210 | *++out = *in++; | |
211 | } else if (*in == *out || | |
212 | !in_table_int16(patch_borders, sbr->num_patches, *in)) { | |
213 | in++; | |
214 | sbr->n_lim--; | |
215 | } else if (!in_table_int16(patch_borders, sbr->num_patches, *out)) { | |
216 | *out = *in++; | |
217 | sbr->n_lim--; | |
218 | } else { | |
219 | *++out = *in++; | |
220 | } | |
221 | } | |
222 | } else { | |
223 | sbr->f_tablelim[0] = sbr->f_tablelow[0]; | |
224 | sbr->f_tablelim[1] = sbr->f_tablelow[sbr->n[0]]; | |
225 | sbr->n_lim = 1; | |
226 | } | |
227 | } | |
228 | ||
229 | static unsigned int read_sbr_header(SpectralBandReplication *sbr, GetBitContext *gb) | |
230 | { | |
231 | unsigned int cnt = get_bits_count(gb); | |
232 | uint8_t bs_header_extra_1; | |
233 | uint8_t bs_header_extra_2; | |
234 | int old_bs_limiter_bands = sbr->bs_limiter_bands; | |
235 | SpectrumParameters old_spectrum_params; | |
236 | ||
237 | sbr->start = 1; | |
238 | ||
239 | // Save last spectrum parameters variables to compare to new ones | |
240 | memcpy(&old_spectrum_params, &sbr->spectrum_params, sizeof(SpectrumParameters)); | |
241 | ||
242 | sbr->bs_amp_res_header = get_bits1(gb); | |
243 | sbr->spectrum_params.bs_start_freq = get_bits(gb, 4); | |
244 | sbr->spectrum_params.bs_stop_freq = get_bits(gb, 4); | |
245 | sbr->spectrum_params.bs_xover_band = get_bits(gb, 3); | |
246 | skip_bits(gb, 2); // bs_reserved | |
247 | ||
248 | bs_header_extra_1 = get_bits1(gb); | |
249 | bs_header_extra_2 = get_bits1(gb); | |
250 | ||
251 | if (bs_header_extra_1) { | |
252 | sbr->spectrum_params.bs_freq_scale = get_bits(gb, 2); | |
253 | sbr->spectrum_params.bs_alter_scale = get_bits1(gb); | |
254 | sbr->spectrum_params.bs_noise_bands = get_bits(gb, 2); | |
255 | } else { | |
256 | sbr->spectrum_params.bs_freq_scale = 2; | |
257 | sbr->spectrum_params.bs_alter_scale = 1; | |
258 | sbr->spectrum_params.bs_noise_bands = 2; | |
259 | } | |
260 | ||
261 | // Check if spectrum parameters changed | |
262 | if (memcmp(&old_spectrum_params, &sbr->spectrum_params, sizeof(SpectrumParameters))) | |
263 | sbr->reset = 1; | |
264 | ||
265 | if (bs_header_extra_2) { | |
266 | sbr->bs_limiter_bands = get_bits(gb, 2); | |
267 | sbr->bs_limiter_gains = get_bits(gb, 2); | |
268 | sbr->bs_interpol_freq = get_bits1(gb); | |
269 | sbr->bs_smoothing_mode = get_bits1(gb); | |
270 | } else { | |
271 | sbr->bs_limiter_bands = 2; | |
272 | sbr->bs_limiter_gains = 2; | |
273 | sbr->bs_interpol_freq = 1; | |
274 | sbr->bs_smoothing_mode = 1; | |
275 | } | |
276 | ||
277 | if (sbr->bs_limiter_bands != old_bs_limiter_bands && !sbr->reset) | |
278 | sbr_make_f_tablelim(sbr); | |
279 | ||
280 | return get_bits_count(gb) - cnt; | |
281 | } | |
282 | ||
283 | static int array_min_int16(const int16_t *array, int nel) | |
284 | { | |
285 | int i, min = array[0]; | |
286 | for (i = 1; i < nel; i++) | |
287 | min = FFMIN(array[i], min); | |
288 | return min; | |
289 | } | |
290 | ||
291 | static void make_bands(int16_t* bands, int start, int stop, int num_bands) | |
292 | { | |
293 | int k, previous, present; | |
294 | float base, prod; | |
295 | ||
296 | base = powf((float)stop / start, 1.0f / num_bands); | |
297 | prod = start; | |
298 | previous = start; | |
299 | ||
300 | for (k = 0; k < num_bands-1; k++) { | |
301 | prod *= base; | |
302 | present = lrintf(prod); | |
303 | bands[k] = present - previous; | |
304 | previous = present; | |
305 | } | |
306 | bands[num_bands-1] = stop - previous; | |
307 | } | |
308 | ||
309 | static int check_n_master(AVCodecContext *avctx, int n_master, int bs_xover_band) | |
310 | { | |
311 | // Requirements (14496-3 sp04 p205) | |
312 | if (n_master <= 0) { | |
313 | av_log(avctx, AV_LOG_ERROR, "Invalid n_master: %d\n", n_master); | |
314 | return -1; | |
315 | } | |
316 | if (bs_xover_band >= n_master) { | |
317 | av_log(avctx, AV_LOG_ERROR, | |
318 | "Invalid bitstream, crossover band index beyond array bounds: %d\n", | |
319 | bs_xover_band); | |
320 | return -1; | |
321 | } | |
322 | return 0; | |
323 | } | |
324 | ||
325 | /// Master Frequency Band Table (14496-3 sp04 p194) | |
326 | static int sbr_make_f_master(AACContext *ac, SpectralBandReplication *sbr, | |
327 | SpectrumParameters *spectrum) | |
328 | { | |
f6fa7814 | 329 | unsigned int temp, max_qmf_subbands = 0; |
2ba45a60 DM |
330 | unsigned int start_min, stop_min; |
331 | int k; | |
332 | const int8_t *sbr_offset_ptr; | |
333 | int16_t stop_dk[13]; | |
334 | ||
335 | if (sbr->sample_rate < 32000) { | |
336 | temp = 3000; | |
337 | } else if (sbr->sample_rate < 64000) { | |
338 | temp = 4000; | |
339 | } else | |
340 | temp = 5000; | |
341 | ||
342 | switch (sbr->sample_rate) { | |
343 | case 16000: | |
344 | sbr_offset_ptr = sbr_offset[0]; | |
345 | break; | |
346 | case 22050: | |
347 | sbr_offset_ptr = sbr_offset[1]; | |
348 | break; | |
349 | case 24000: | |
350 | sbr_offset_ptr = sbr_offset[2]; | |
351 | break; | |
352 | case 32000: | |
353 | sbr_offset_ptr = sbr_offset[3]; | |
354 | break; | |
355 | case 44100: case 48000: case 64000: | |
356 | sbr_offset_ptr = sbr_offset[4]; | |
357 | break; | |
358 | case 88200: case 96000: case 128000: case 176400: case 192000: | |
359 | sbr_offset_ptr = sbr_offset[5]; | |
360 | break; | |
361 | default: | |
362 | av_log(ac->avctx, AV_LOG_ERROR, | |
363 | "Unsupported sample rate for SBR: %d\n", sbr->sample_rate); | |
364 | return -1; | |
365 | } | |
366 | ||
367 | start_min = ((temp << 7) + (sbr->sample_rate >> 1)) / sbr->sample_rate; | |
368 | stop_min = ((temp << 8) + (sbr->sample_rate >> 1)) / sbr->sample_rate; | |
369 | ||
370 | sbr->k[0] = start_min + sbr_offset_ptr[spectrum->bs_start_freq]; | |
371 | ||
372 | if (spectrum->bs_stop_freq < 14) { | |
373 | sbr->k[2] = stop_min; | |
374 | make_bands(stop_dk, stop_min, 64, 13); | |
375 | qsort(stop_dk, 13, sizeof(stop_dk[0]), qsort_comparison_function_int16); | |
376 | for (k = 0; k < spectrum->bs_stop_freq; k++) | |
377 | sbr->k[2] += stop_dk[k]; | |
378 | } else if (spectrum->bs_stop_freq == 14) { | |
379 | sbr->k[2] = 2*sbr->k[0]; | |
380 | } else if (spectrum->bs_stop_freq == 15) { | |
381 | sbr->k[2] = 3*sbr->k[0]; | |
382 | } else { | |
383 | av_log(ac->avctx, AV_LOG_ERROR, | |
384 | "Invalid bs_stop_freq: %d\n", spectrum->bs_stop_freq); | |
385 | return -1; | |
386 | } | |
387 | sbr->k[2] = FFMIN(64, sbr->k[2]); | |
388 | ||
389 | // Requirements (14496-3 sp04 p205) | |
390 | if (sbr->sample_rate <= 32000) { | |
391 | max_qmf_subbands = 48; | |
392 | } else if (sbr->sample_rate == 44100) { | |
393 | max_qmf_subbands = 35; | |
394 | } else if (sbr->sample_rate >= 48000) | |
395 | max_qmf_subbands = 32; | |
396 | else | |
397 | av_assert0(0); | |
398 | ||
399 | if (sbr->k[2] - sbr->k[0] > max_qmf_subbands) { | |
400 | av_log(ac->avctx, AV_LOG_ERROR, | |
401 | "Invalid bitstream, too many QMF subbands: %d\n", sbr->k[2] - sbr->k[0]); | |
402 | return -1; | |
403 | } | |
404 | ||
405 | if (!spectrum->bs_freq_scale) { | |
406 | int dk, k2diff; | |
407 | ||
408 | dk = spectrum->bs_alter_scale + 1; | |
409 | sbr->n_master = ((sbr->k[2] - sbr->k[0] + (dk&2)) >> dk) << 1; | |
410 | if (check_n_master(ac->avctx, sbr->n_master, sbr->spectrum_params.bs_xover_band)) | |
411 | return -1; | |
412 | ||
413 | for (k = 1; k <= sbr->n_master; k++) | |
414 | sbr->f_master[k] = dk; | |
415 | ||
416 | k2diff = sbr->k[2] - sbr->k[0] - sbr->n_master * dk; | |
417 | if (k2diff < 0) { | |
418 | sbr->f_master[1]--; | |
419 | sbr->f_master[2]-= (k2diff < -1); | |
420 | } else if (k2diff) { | |
421 | sbr->f_master[sbr->n_master]++; | |
422 | } | |
423 | ||
424 | sbr->f_master[0] = sbr->k[0]; | |
425 | for (k = 1; k <= sbr->n_master; k++) | |
426 | sbr->f_master[k] += sbr->f_master[k - 1]; | |
427 | ||
428 | } else { | |
429 | int half_bands = 7 - spectrum->bs_freq_scale; // bs_freq_scale = {1,2,3} | |
430 | int two_regions, num_bands_0; | |
431 | int vdk0_max, vdk1_min; | |
432 | int16_t vk0[49]; | |
433 | ||
434 | if (49 * sbr->k[2] > 110 * sbr->k[0]) { | |
435 | two_regions = 1; | |
436 | sbr->k[1] = 2 * sbr->k[0]; | |
437 | } else { | |
438 | two_regions = 0; | |
439 | sbr->k[1] = sbr->k[2]; | |
440 | } | |
441 | ||
442 | num_bands_0 = lrintf(half_bands * log2f(sbr->k[1] / (float)sbr->k[0])) * 2; | |
443 | ||
444 | if (num_bands_0 <= 0) { // Requirements (14496-3 sp04 p205) | |
445 | av_log(ac->avctx, AV_LOG_ERROR, "Invalid num_bands_0: %d\n", num_bands_0); | |
446 | return -1; | |
447 | } | |
448 | ||
449 | vk0[0] = 0; | |
450 | ||
451 | make_bands(vk0+1, sbr->k[0], sbr->k[1], num_bands_0); | |
452 | ||
453 | qsort(vk0 + 1, num_bands_0, sizeof(vk0[1]), qsort_comparison_function_int16); | |
454 | vdk0_max = vk0[num_bands_0]; | |
455 | ||
456 | vk0[0] = sbr->k[0]; | |
457 | for (k = 1; k <= num_bands_0; k++) { | |
458 | if (vk0[k] <= 0) { // Requirements (14496-3 sp04 p205) | |
459 | av_log(ac->avctx, AV_LOG_ERROR, "Invalid vDk0[%d]: %d\n", k, vk0[k]); | |
460 | return -1; | |
461 | } | |
462 | vk0[k] += vk0[k-1]; | |
463 | } | |
464 | ||
465 | if (two_regions) { | |
466 | int16_t vk1[49]; | |
467 | float invwarp = spectrum->bs_alter_scale ? 0.76923076923076923077f | |
468 | : 1.0f; // bs_alter_scale = {0,1} | |
469 | int num_bands_1 = lrintf(half_bands * invwarp * | |
470 | log2f(sbr->k[2] / (float)sbr->k[1])) * 2; | |
471 | ||
472 | make_bands(vk1+1, sbr->k[1], sbr->k[2], num_bands_1); | |
473 | ||
474 | vdk1_min = array_min_int16(vk1 + 1, num_bands_1); | |
475 | ||
476 | if (vdk1_min < vdk0_max) { | |
477 | int change; | |
478 | qsort(vk1 + 1, num_bands_1, sizeof(vk1[1]), qsort_comparison_function_int16); | |
479 | change = FFMIN(vdk0_max - vk1[1], (vk1[num_bands_1] - vk1[1]) >> 1); | |
480 | vk1[1] += change; | |
481 | vk1[num_bands_1] -= change; | |
482 | } | |
483 | ||
484 | qsort(vk1 + 1, num_bands_1, sizeof(vk1[1]), qsort_comparison_function_int16); | |
485 | ||
486 | vk1[0] = sbr->k[1]; | |
487 | for (k = 1; k <= num_bands_1; k++) { | |
488 | if (vk1[k] <= 0) { // Requirements (14496-3 sp04 p205) | |
489 | av_log(ac->avctx, AV_LOG_ERROR, "Invalid vDk1[%d]: %d\n", k, vk1[k]); | |
490 | return -1; | |
491 | } | |
492 | vk1[k] += vk1[k-1]; | |
493 | } | |
494 | ||
495 | sbr->n_master = num_bands_0 + num_bands_1; | |
496 | if (check_n_master(ac->avctx, sbr->n_master, sbr->spectrum_params.bs_xover_band)) | |
497 | return -1; | |
498 | memcpy(&sbr->f_master[0], vk0, | |
499 | (num_bands_0 + 1) * sizeof(sbr->f_master[0])); | |
500 | memcpy(&sbr->f_master[num_bands_0 + 1], vk1 + 1, | |
501 | num_bands_1 * sizeof(sbr->f_master[0])); | |
502 | ||
503 | } else { | |
504 | sbr->n_master = num_bands_0; | |
505 | if (check_n_master(ac->avctx, sbr->n_master, sbr->spectrum_params.bs_xover_band)) | |
506 | return -1; | |
507 | memcpy(sbr->f_master, vk0, (num_bands_0 + 1) * sizeof(sbr->f_master[0])); | |
508 | } | |
509 | } | |
510 | ||
511 | return 0; | |
512 | } | |
513 | ||
514 | /// High Frequency Generation - Patch Construction (14496-3 sp04 p216 fig. 4.46) | |
515 | static int sbr_hf_calc_npatches(AACContext *ac, SpectralBandReplication *sbr) | |
516 | { | |
517 | int i, k, sb = 0; | |
518 | int msb = sbr->k[0]; | |
519 | int usb = sbr->kx[1]; | |
520 | int goal_sb = ((1000 << 11) + (sbr->sample_rate >> 1)) / sbr->sample_rate; | |
521 | ||
522 | sbr->num_patches = 0; | |
523 | ||
524 | if (goal_sb < sbr->kx[1] + sbr->m[1]) { | |
525 | for (k = 0; sbr->f_master[k] < goal_sb; k++) ; | |
526 | } else | |
527 | k = sbr->n_master; | |
528 | ||
529 | do { | |
530 | int odd = 0; | |
531 | for (i = k; i == k || sb > (sbr->k[0] - 1 + msb - odd); i--) { | |
532 | sb = sbr->f_master[i]; | |
533 | odd = (sb + sbr->k[0]) & 1; | |
534 | } | |
535 | ||
536 | // Requirements (14496-3 sp04 p205) sets the maximum number of patches to 5. | |
537 | // After this check the final number of patches can still be six which is | |
538 | // illegal however the Coding Technologies decoder check stream has a final | |
539 | // count of 6 patches | |
540 | if (sbr->num_patches > 5) { | |
541 | av_log(ac->avctx, AV_LOG_ERROR, "Too many patches: %d\n", sbr->num_patches); | |
542 | return -1; | |
543 | } | |
544 | ||
545 | sbr->patch_num_subbands[sbr->num_patches] = FFMAX(sb - usb, 0); | |
546 | sbr->patch_start_subband[sbr->num_patches] = sbr->k[0] - odd - sbr->patch_num_subbands[sbr->num_patches]; | |
547 | ||
548 | if (sbr->patch_num_subbands[sbr->num_patches] > 0) { | |
549 | usb = sb; | |
550 | msb = sb; | |
551 | sbr->num_patches++; | |
552 | } else | |
553 | msb = sbr->kx[1]; | |
554 | ||
555 | if (sbr->f_master[k] - sb < 3) | |
556 | k = sbr->n_master; | |
557 | } while (sb != sbr->kx[1] + sbr->m[1]); | |
558 | ||
f6fa7814 DM |
559 | if (sbr->num_patches > 1 && |
560 | sbr->patch_num_subbands[sbr->num_patches - 1] < 3) | |
2ba45a60 DM |
561 | sbr->num_patches--; |
562 | ||
563 | return 0; | |
564 | } | |
565 | ||
566 | /// Derived Frequency Band Tables (14496-3 sp04 p197) | |
567 | static int sbr_make_f_derived(AACContext *ac, SpectralBandReplication *sbr) | |
568 | { | |
569 | int k, temp; | |
570 | ||
571 | sbr->n[1] = sbr->n_master - sbr->spectrum_params.bs_xover_band; | |
572 | sbr->n[0] = (sbr->n[1] + 1) >> 1; | |
573 | ||
574 | memcpy(sbr->f_tablehigh, &sbr->f_master[sbr->spectrum_params.bs_xover_band], | |
575 | (sbr->n[1] + 1) * sizeof(sbr->f_master[0])); | |
576 | sbr->m[1] = sbr->f_tablehigh[sbr->n[1]] - sbr->f_tablehigh[0]; | |
577 | sbr->kx[1] = sbr->f_tablehigh[0]; | |
578 | ||
579 | // Requirements (14496-3 sp04 p205) | |
580 | if (sbr->kx[1] + sbr->m[1] > 64) { | |
581 | av_log(ac->avctx, AV_LOG_ERROR, | |
582 | "Stop frequency border too high: %d\n", sbr->kx[1] + sbr->m[1]); | |
583 | return -1; | |
584 | } | |
585 | if (sbr->kx[1] > 32) { | |
586 | av_log(ac->avctx, AV_LOG_ERROR, "Start frequency border too high: %d\n", sbr->kx[1]); | |
587 | return -1; | |
588 | } | |
589 | ||
590 | sbr->f_tablelow[0] = sbr->f_tablehigh[0]; | |
591 | temp = sbr->n[1] & 1; | |
592 | for (k = 1; k <= sbr->n[0]; k++) | |
593 | sbr->f_tablelow[k] = sbr->f_tablehigh[2 * k - temp]; | |
594 | ||
595 | sbr->n_q = FFMAX(1, lrintf(sbr->spectrum_params.bs_noise_bands * | |
596 | log2f(sbr->k[2] / (float)sbr->kx[1]))); // 0 <= bs_noise_bands <= 3 | |
597 | if (sbr->n_q > 5) { | |
598 | av_log(ac->avctx, AV_LOG_ERROR, "Too many noise floor scale factors: %d\n", sbr->n_q); | |
599 | return -1; | |
600 | } | |
601 | ||
602 | sbr->f_tablenoise[0] = sbr->f_tablelow[0]; | |
603 | temp = 0; | |
604 | for (k = 1; k <= sbr->n_q; k++) { | |
605 | temp += (sbr->n[0] - temp) / (sbr->n_q + 1 - k); | |
606 | sbr->f_tablenoise[k] = sbr->f_tablelow[temp]; | |
607 | } | |
608 | ||
609 | if (sbr_hf_calc_npatches(ac, sbr) < 0) | |
610 | return -1; | |
611 | ||
612 | sbr_make_f_tablelim(sbr); | |
613 | ||
614 | sbr->data[0].f_indexnoise = 0; | |
615 | sbr->data[1].f_indexnoise = 0; | |
616 | ||
617 | return 0; | |
618 | } | |
619 | ||
620 | static av_always_inline void get_bits1_vector(GetBitContext *gb, uint8_t *vec, | |
621 | int elements) | |
622 | { | |
623 | int i; | |
624 | for (i = 0; i < elements; i++) { | |
625 | vec[i] = get_bits1(gb); | |
626 | } | |
627 | } | |
628 | ||
629 | /** ceil(log2(index+1)) */ | |
630 | static const int8_t ceil_log2[] = { | |
631 | 0, 1, 2, 2, 3, 3, | |
632 | }; | |
633 | ||
634 | static int read_sbr_grid(AACContext *ac, SpectralBandReplication *sbr, | |
635 | GetBitContext *gb, SBRData *ch_data) | |
636 | { | |
637 | int i; | |
638 | unsigned bs_pointer = 0; | |
639 | // frameLengthFlag ? 15 : 16; 960 sample length frames unsupported; this value is numTimeSlots | |
640 | int abs_bord_trail = 16; | |
641 | int num_rel_lead, num_rel_trail; | |
642 | unsigned bs_num_env_old = ch_data->bs_num_env; | |
643 | ||
644 | ch_data->bs_freq_res[0] = ch_data->bs_freq_res[ch_data->bs_num_env]; | |
645 | ch_data->bs_amp_res = sbr->bs_amp_res_header; | |
646 | ch_data->t_env_num_env_old = ch_data->t_env[bs_num_env_old]; | |
647 | ||
648 | switch (ch_data->bs_frame_class = get_bits(gb, 2)) { | |
649 | case FIXFIX: | |
650 | ch_data->bs_num_env = 1 << get_bits(gb, 2); | |
651 | num_rel_lead = ch_data->bs_num_env - 1; | |
652 | if (ch_data->bs_num_env == 1) | |
653 | ch_data->bs_amp_res = 0; | |
654 | ||
655 | if (ch_data->bs_num_env > 4) { | |
656 | av_log(ac->avctx, AV_LOG_ERROR, | |
657 | "Invalid bitstream, too many SBR envelopes in FIXFIX type SBR frame: %d\n", | |
658 | ch_data->bs_num_env); | |
659 | return -1; | |
660 | } | |
661 | ||
662 | ch_data->t_env[0] = 0; | |
663 | ch_data->t_env[ch_data->bs_num_env] = abs_bord_trail; | |
664 | ||
665 | abs_bord_trail = (abs_bord_trail + (ch_data->bs_num_env >> 1)) / | |
666 | ch_data->bs_num_env; | |
667 | for (i = 0; i < num_rel_lead; i++) | |
668 | ch_data->t_env[i + 1] = ch_data->t_env[i] + abs_bord_trail; | |
669 | ||
670 | ch_data->bs_freq_res[1] = get_bits1(gb); | |
671 | for (i = 1; i < ch_data->bs_num_env; i++) | |
672 | ch_data->bs_freq_res[i + 1] = ch_data->bs_freq_res[1]; | |
673 | break; | |
674 | case FIXVAR: | |
675 | abs_bord_trail += get_bits(gb, 2); | |
676 | num_rel_trail = get_bits(gb, 2); | |
677 | ch_data->bs_num_env = num_rel_trail + 1; | |
678 | ch_data->t_env[0] = 0; | |
679 | ch_data->t_env[ch_data->bs_num_env] = abs_bord_trail; | |
680 | ||
681 | for (i = 0; i < num_rel_trail; i++) | |
682 | ch_data->t_env[ch_data->bs_num_env - 1 - i] = | |
683 | ch_data->t_env[ch_data->bs_num_env - i] - 2 * get_bits(gb, 2) - 2; | |
684 | ||
685 | bs_pointer = get_bits(gb, ceil_log2[ch_data->bs_num_env]); | |
686 | ||
687 | for (i = 0; i < ch_data->bs_num_env; i++) | |
688 | ch_data->bs_freq_res[ch_data->bs_num_env - i] = get_bits1(gb); | |
689 | break; | |
690 | case VARFIX: | |
691 | ch_data->t_env[0] = get_bits(gb, 2); | |
692 | num_rel_lead = get_bits(gb, 2); | |
693 | ch_data->bs_num_env = num_rel_lead + 1; | |
694 | ch_data->t_env[ch_data->bs_num_env] = abs_bord_trail; | |
695 | ||
696 | for (i = 0; i < num_rel_lead; i++) | |
697 | ch_data->t_env[i + 1] = ch_data->t_env[i] + 2 * get_bits(gb, 2) + 2; | |
698 | ||
699 | bs_pointer = get_bits(gb, ceil_log2[ch_data->bs_num_env]); | |
700 | ||
701 | get_bits1_vector(gb, ch_data->bs_freq_res + 1, ch_data->bs_num_env); | |
702 | break; | |
703 | case VARVAR: | |
704 | ch_data->t_env[0] = get_bits(gb, 2); | |
705 | abs_bord_trail += get_bits(gb, 2); | |
706 | num_rel_lead = get_bits(gb, 2); | |
707 | num_rel_trail = get_bits(gb, 2); | |
708 | ch_data->bs_num_env = num_rel_lead + num_rel_trail + 1; | |
709 | ||
710 | if (ch_data->bs_num_env > 5) { | |
711 | av_log(ac->avctx, AV_LOG_ERROR, | |
712 | "Invalid bitstream, too many SBR envelopes in VARVAR type SBR frame: %d\n", | |
713 | ch_data->bs_num_env); | |
714 | return -1; | |
715 | } | |
716 | ||
717 | ch_data->t_env[ch_data->bs_num_env] = abs_bord_trail; | |
718 | ||
719 | for (i = 0; i < num_rel_lead; i++) | |
720 | ch_data->t_env[i + 1] = ch_data->t_env[i] + 2 * get_bits(gb, 2) + 2; | |
721 | for (i = 0; i < num_rel_trail; i++) | |
722 | ch_data->t_env[ch_data->bs_num_env - 1 - i] = | |
723 | ch_data->t_env[ch_data->bs_num_env - i] - 2 * get_bits(gb, 2) - 2; | |
724 | ||
725 | bs_pointer = get_bits(gb, ceil_log2[ch_data->bs_num_env]); | |
726 | ||
727 | get_bits1_vector(gb, ch_data->bs_freq_res + 1, ch_data->bs_num_env); | |
728 | break; | |
729 | } | |
730 | ||
731 | if (bs_pointer > ch_data->bs_num_env + 1) { | |
732 | av_log(ac->avctx, AV_LOG_ERROR, | |
733 | "Invalid bitstream, bs_pointer points to a middle noise border outside the time borders table: %d\n", | |
734 | bs_pointer); | |
735 | return -1; | |
736 | } | |
737 | ||
738 | for (i = 1; i <= ch_data->bs_num_env; i++) { | |
739 | if (ch_data->t_env[i-1] > ch_data->t_env[i]) { | |
740 | av_log(ac->avctx, AV_LOG_ERROR, "Non monotone time borders\n"); | |
741 | return -1; | |
742 | } | |
743 | } | |
744 | ||
745 | ch_data->bs_num_noise = (ch_data->bs_num_env > 1) + 1; | |
746 | ||
747 | ch_data->t_q[0] = ch_data->t_env[0]; | |
748 | ch_data->t_q[ch_data->bs_num_noise] = ch_data->t_env[ch_data->bs_num_env]; | |
749 | if (ch_data->bs_num_noise > 1) { | |
750 | unsigned int idx; | |
751 | if (ch_data->bs_frame_class == FIXFIX) { | |
752 | idx = ch_data->bs_num_env >> 1; | |
753 | } else if (ch_data->bs_frame_class & 1) { // FIXVAR or VARVAR | |
754 | idx = ch_data->bs_num_env - FFMAX((int)bs_pointer - 1, 1); | |
755 | } else { // VARFIX | |
756 | if (!bs_pointer) | |
757 | idx = 1; | |
758 | else if (bs_pointer == 1) | |
759 | idx = ch_data->bs_num_env - 1; | |
760 | else // bs_pointer > 1 | |
761 | idx = bs_pointer - 1; | |
762 | } | |
763 | ch_data->t_q[1] = ch_data->t_env[idx]; | |
764 | } | |
765 | ||
766 | ch_data->e_a[0] = -(ch_data->e_a[1] != bs_num_env_old); // l_APrev | |
767 | ch_data->e_a[1] = -1; | |
768 | if ((ch_data->bs_frame_class & 1) && bs_pointer) { // FIXVAR or VARVAR and bs_pointer != 0 | |
769 | ch_data->e_a[1] = ch_data->bs_num_env + 1 - bs_pointer; | |
770 | } else if ((ch_data->bs_frame_class == 2) && (bs_pointer > 1)) // VARFIX and bs_pointer > 1 | |
771 | ch_data->e_a[1] = bs_pointer - 1; | |
772 | ||
773 | return 0; | |
774 | } | |
775 | ||
776 | static void copy_sbr_grid(SBRData *dst, const SBRData *src) { | |
777 | //These variables are saved from the previous frame rather than copied | |
778 | dst->bs_freq_res[0] = dst->bs_freq_res[dst->bs_num_env]; | |
779 | dst->t_env_num_env_old = dst->t_env[dst->bs_num_env]; | |
780 | dst->e_a[0] = -(dst->e_a[1] != dst->bs_num_env); | |
781 | ||
782 | //These variables are read from the bitstream and therefore copied | |
783 | memcpy(dst->bs_freq_res+1, src->bs_freq_res+1, sizeof(dst->bs_freq_res)-sizeof(*dst->bs_freq_res)); | |
784 | memcpy(dst->t_env, src->t_env, sizeof(dst->t_env)); | |
785 | memcpy(dst->t_q, src->t_q, sizeof(dst->t_q)); | |
786 | dst->bs_num_env = src->bs_num_env; | |
787 | dst->bs_amp_res = src->bs_amp_res; | |
788 | dst->bs_num_noise = src->bs_num_noise; | |
789 | dst->bs_frame_class = src->bs_frame_class; | |
790 | dst->e_a[1] = src->e_a[1]; | |
791 | } | |
792 | ||
793 | /// Read how the envelope and noise floor data is delta coded | |
794 | static void read_sbr_dtdf(SpectralBandReplication *sbr, GetBitContext *gb, | |
795 | SBRData *ch_data) | |
796 | { | |
797 | get_bits1_vector(gb, ch_data->bs_df_env, ch_data->bs_num_env); | |
798 | get_bits1_vector(gb, ch_data->bs_df_noise, ch_data->bs_num_noise); | |
799 | } | |
800 | ||
801 | /// Read inverse filtering data | |
802 | static void read_sbr_invf(SpectralBandReplication *sbr, GetBitContext *gb, | |
803 | SBRData *ch_data) | |
804 | { | |
805 | int i; | |
806 | ||
807 | memcpy(ch_data->bs_invf_mode[1], ch_data->bs_invf_mode[0], 5 * sizeof(uint8_t)); | |
808 | for (i = 0; i < sbr->n_q; i++) | |
809 | ch_data->bs_invf_mode[0][i] = get_bits(gb, 2); | |
810 | } | |
811 | ||
812 | static void read_sbr_envelope(SpectralBandReplication *sbr, GetBitContext *gb, | |
813 | SBRData *ch_data, int ch) | |
814 | { | |
815 | int bits; | |
816 | int i, j, k; | |
817 | VLC_TYPE (*t_huff)[2], (*f_huff)[2]; | |
818 | int t_lav, f_lav; | |
819 | const int delta = (ch == 1 && sbr->bs_coupling == 1) + 1; | |
820 | const int odd = sbr->n[1] & 1; | |
821 | ||
822 | if (sbr->bs_coupling && ch) { | |
823 | if (ch_data->bs_amp_res) { | |
824 | bits = 5; | |
825 | t_huff = vlc_sbr[T_HUFFMAN_ENV_BAL_3_0DB].table; | |
826 | t_lav = vlc_sbr_lav[T_HUFFMAN_ENV_BAL_3_0DB]; | |
827 | f_huff = vlc_sbr[F_HUFFMAN_ENV_BAL_3_0DB].table; | |
828 | f_lav = vlc_sbr_lav[F_HUFFMAN_ENV_BAL_3_0DB]; | |
829 | } else { | |
830 | bits = 6; | |
831 | t_huff = vlc_sbr[T_HUFFMAN_ENV_BAL_1_5DB].table; | |
832 | t_lav = vlc_sbr_lav[T_HUFFMAN_ENV_BAL_1_5DB]; | |
833 | f_huff = vlc_sbr[F_HUFFMAN_ENV_BAL_1_5DB].table; | |
834 | f_lav = vlc_sbr_lav[F_HUFFMAN_ENV_BAL_1_5DB]; | |
835 | } | |
836 | } else { | |
837 | if (ch_data->bs_amp_res) { | |
838 | bits = 6; | |
839 | t_huff = vlc_sbr[T_HUFFMAN_ENV_3_0DB].table; | |
840 | t_lav = vlc_sbr_lav[T_HUFFMAN_ENV_3_0DB]; | |
841 | f_huff = vlc_sbr[F_HUFFMAN_ENV_3_0DB].table; | |
842 | f_lav = vlc_sbr_lav[F_HUFFMAN_ENV_3_0DB]; | |
843 | } else { | |
844 | bits = 7; | |
845 | t_huff = vlc_sbr[T_HUFFMAN_ENV_1_5DB].table; | |
846 | t_lav = vlc_sbr_lav[T_HUFFMAN_ENV_1_5DB]; | |
847 | f_huff = vlc_sbr[F_HUFFMAN_ENV_1_5DB].table; | |
848 | f_lav = vlc_sbr_lav[F_HUFFMAN_ENV_1_5DB]; | |
849 | } | |
850 | } | |
851 | ||
852 | for (i = 0; i < ch_data->bs_num_env; i++) { | |
853 | if (ch_data->bs_df_env[i]) { | |
854 | // bs_freq_res[0] == bs_freq_res[bs_num_env] from prev frame | |
855 | if (ch_data->bs_freq_res[i + 1] == ch_data->bs_freq_res[i]) { | |
856 | for (j = 0; j < sbr->n[ch_data->bs_freq_res[i + 1]]; j++) | |
857 | ch_data->env_facs[i + 1][j] = ch_data->env_facs[i][j] + delta * (get_vlc2(gb, t_huff, 9, 3) - t_lav); | |
858 | } else if (ch_data->bs_freq_res[i + 1]) { | |
859 | for (j = 0; j < sbr->n[ch_data->bs_freq_res[i + 1]]; j++) { | |
860 | k = (j + odd) >> 1; // find k such that f_tablelow[k] <= f_tablehigh[j] < f_tablelow[k + 1] | |
861 | ch_data->env_facs[i + 1][j] = ch_data->env_facs[i][k] + delta * (get_vlc2(gb, t_huff, 9, 3) - t_lav); | |
862 | } | |
863 | } else { | |
864 | for (j = 0; j < sbr->n[ch_data->bs_freq_res[i + 1]]; j++) { | |
865 | k = j ? 2*j - odd : 0; // find k such that f_tablehigh[k] == f_tablelow[j] | |
866 | ch_data->env_facs[i + 1][j] = ch_data->env_facs[i][k] + delta * (get_vlc2(gb, t_huff, 9, 3) - t_lav); | |
867 | } | |
868 | } | |
869 | } else { | |
870 | ch_data->env_facs[i + 1][0] = delta * get_bits(gb, bits); // bs_env_start_value_balance | |
871 | for (j = 1; j < sbr->n[ch_data->bs_freq_res[i + 1]]; j++) | |
872 | 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); | |
873 | } | |
874 | } | |
875 | ||
876 | //assign 0th elements of env_facs from last elements | |
877 | memcpy(ch_data->env_facs[0], ch_data->env_facs[ch_data->bs_num_env], | |
878 | sizeof(ch_data->env_facs[0])); | |
879 | } | |
880 | ||
881 | static void read_sbr_noise(SpectralBandReplication *sbr, GetBitContext *gb, | |
882 | SBRData *ch_data, int ch) | |
883 | { | |
884 | int i, j; | |
885 | VLC_TYPE (*t_huff)[2], (*f_huff)[2]; | |
886 | int t_lav, f_lav; | |
887 | int delta = (ch == 1 && sbr->bs_coupling == 1) + 1; | |
888 | ||
889 | if (sbr->bs_coupling && ch) { | |
890 | t_huff = vlc_sbr[T_HUFFMAN_NOISE_BAL_3_0DB].table; | |
891 | t_lav = vlc_sbr_lav[T_HUFFMAN_NOISE_BAL_3_0DB]; | |
892 | f_huff = vlc_sbr[F_HUFFMAN_ENV_BAL_3_0DB].table; | |
893 | f_lav = vlc_sbr_lav[F_HUFFMAN_ENV_BAL_3_0DB]; | |
894 | } else { | |
895 | t_huff = vlc_sbr[T_HUFFMAN_NOISE_3_0DB].table; | |
896 | t_lav = vlc_sbr_lav[T_HUFFMAN_NOISE_3_0DB]; | |
897 | f_huff = vlc_sbr[F_HUFFMAN_ENV_3_0DB].table; | |
898 | f_lav = vlc_sbr_lav[F_HUFFMAN_ENV_3_0DB]; | |
899 | } | |
900 | ||
901 | for (i = 0; i < ch_data->bs_num_noise; i++) { | |
902 | if (ch_data->bs_df_noise[i]) { | |
903 | for (j = 0; j < sbr->n_q; j++) | |
904 | ch_data->noise_facs[i + 1][j] = ch_data->noise_facs[i][j] + delta * (get_vlc2(gb, t_huff, 9, 2) - t_lav); | |
905 | } else { | |
906 | ch_data->noise_facs[i + 1][0] = delta * get_bits(gb, 5); // bs_noise_start_value_balance or bs_noise_start_value_level | |
907 | for (j = 1; j < sbr->n_q; j++) | |
908 | 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); | |
909 | } | |
910 | } | |
911 | ||
912 | //assign 0th elements of noise_facs from last elements | |
913 | memcpy(ch_data->noise_facs[0], ch_data->noise_facs[ch_data->bs_num_noise], | |
914 | sizeof(ch_data->noise_facs[0])); | |
915 | } | |
916 | ||
917 | static void read_sbr_extension(AACContext *ac, SpectralBandReplication *sbr, | |
918 | GetBitContext *gb, | |
919 | int bs_extension_id, int *num_bits_left) | |
920 | { | |
921 | switch (bs_extension_id) { | |
922 | case EXTENSION_ID_PS: | |
923 | if (!ac->oc[1].m4ac.ps) { | |
924 | av_log(ac->avctx, AV_LOG_ERROR, "Parametric Stereo signaled to be not-present but was found in the bitstream.\n"); | |
925 | skip_bits_long(gb, *num_bits_left); // bs_fill_bits | |
926 | *num_bits_left = 0; | |
927 | } else { | |
928 | #if 1 | |
929 | *num_bits_left -= ff_ps_read_data(ac->avctx, gb, &sbr->ps, *num_bits_left); | |
930 | ac->avctx->profile = FF_PROFILE_AAC_HE_V2; | |
931 | #else | |
932 | avpriv_report_missing_feature(ac->avctx, "Parametric Stereo"); | |
933 | skip_bits_long(gb, *num_bits_left); // bs_fill_bits | |
934 | *num_bits_left = 0; | |
935 | #endif | |
936 | } | |
937 | break; | |
938 | default: | |
939 | // some files contain 0-padding | |
940 | if (bs_extension_id || *num_bits_left > 16 || show_bits(gb, *num_bits_left)) | |
941 | avpriv_request_sample(ac->avctx, "Reserved SBR extensions"); | |
942 | skip_bits_long(gb, *num_bits_left); // bs_fill_bits | |
943 | *num_bits_left = 0; | |
944 | break; | |
945 | } | |
946 | } | |
947 | ||
948 | static int read_sbr_single_channel_element(AACContext *ac, | |
949 | SpectralBandReplication *sbr, | |
950 | GetBitContext *gb) | |
951 | { | |
952 | if (get_bits1(gb)) // bs_data_extra | |
953 | skip_bits(gb, 4); // bs_reserved | |
954 | ||
955 | if (read_sbr_grid(ac, sbr, gb, &sbr->data[0])) | |
956 | return -1; | |
957 | read_sbr_dtdf(sbr, gb, &sbr->data[0]); | |
958 | read_sbr_invf(sbr, gb, &sbr->data[0]); | |
959 | read_sbr_envelope(sbr, gb, &sbr->data[0], 0); | |
960 | read_sbr_noise(sbr, gb, &sbr->data[0], 0); | |
961 | ||
962 | if ((sbr->data[0].bs_add_harmonic_flag = get_bits1(gb))) | |
963 | get_bits1_vector(gb, sbr->data[0].bs_add_harmonic, sbr->n[1]); | |
964 | ||
965 | return 0; | |
966 | } | |
967 | ||
968 | static int read_sbr_channel_pair_element(AACContext *ac, | |
969 | SpectralBandReplication *sbr, | |
970 | GetBitContext *gb) | |
971 | { | |
972 | if (get_bits1(gb)) // bs_data_extra | |
973 | skip_bits(gb, 8); // bs_reserved | |
974 | ||
975 | if ((sbr->bs_coupling = get_bits1(gb))) { | |
976 | if (read_sbr_grid(ac, sbr, gb, &sbr->data[0])) | |
977 | return -1; | |
978 | copy_sbr_grid(&sbr->data[1], &sbr->data[0]); | |
979 | read_sbr_dtdf(sbr, gb, &sbr->data[0]); | |
980 | read_sbr_dtdf(sbr, gb, &sbr->data[1]); | |
981 | read_sbr_invf(sbr, gb, &sbr->data[0]); | |
982 | memcpy(sbr->data[1].bs_invf_mode[1], sbr->data[1].bs_invf_mode[0], sizeof(sbr->data[1].bs_invf_mode[0])); | |
983 | memcpy(sbr->data[1].bs_invf_mode[0], sbr->data[0].bs_invf_mode[0], sizeof(sbr->data[1].bs_invf_mode[0])); | |
984 | read_sbr_envelope(sbr, gb, &sbr->data[0], 0); | |
985 | read_sbr_noise(sbr, gb, &sbr->data[0], 0); | |
986 | read_sbr_envelope(sbr, gb, &sbr->data[1], 1); | |
987 | read_sbr_noise(sbr, gb, &sbr->data[1], 1); | |
988 | } else { | |
989 | if (read_sbr_grid(ac, sbr, gb, &sbr->data[0]) || | |
990 | read_sbr_grid(ac, sbr, gb, &sbr->data[1])) | |
991 | return -1; | |
992 | read_sbr_dtdf(sbr, gb, &sbr->data[0]); | |
993 | read_sbr_dtdf(sbr, gb, &sbr->data[1]); | |
994 | read_sbr_invf(sbr, gb, &sbr->data[0]); | |
995 | read_sbr_invf(sbr, gb, &sbr->data[1]); | |
996 | read_sbr_envelope(sbr, gb, &sbr->data[0], 0); | |
997 | read_sbr_envelope(sbr, gb, &sbr->data[1], 1); | |
998 | read_sbr_noise(sbr, gb, &sbr->data[0], 0); | |
999 | read_sbr_noise(sbr, gb, &sbr->data[1], 1); | |
1000 | } | |
1001 | ||
1002 | if ((sbr->data[0].bs_add_harmonic_flag = get_bits1(gb))) | |
1003 | get_bits1_vector(gb, sbr->data[0].bs_add_harmonic, sbr->n[1]); | |
1004 | if ((sbr->data[1].bs_add_harmonic_flag = get_bits1(gb))) | |
1005 | get_bits1_vector(gb, sbr->data[1].bs_add_harmonic, sbr->n[1]); | |
1006 | ||
1007 | return 0; | |
1008 | } | |
1009 | ||
1010 | static unsigned int read_sbr_data(AACContext *ac, SpectralBandReplication *sbr, | |
1011 | GetBitContext *gb, int id_aac) | |
1012 | { | |
1013 | unsigned int cnt = get_bits_count(gb); | |
1014 | ||
1015 | if (id_aac == TYPE_SCE || id_aac == TYPE_CCE) { | |
1016 | if (read_sbr_single_channel_element(ac, sbr, gb)) { | |
1017 | sbr_turnoff(sbr); | |
1018 | return get_bits_count(gb) - cnt; | |
1019 | } | |
1020 | } else if (id_aac == TYPE_CPE) { | |
1021 | if (read_sbr_channel_pair_element(ac, sbr, gb)) { | |
1022 | sbr_turnoff(sbr); | |
1023 | return get_bits_count(gb) - cnt; | |
1024 | } | |
1025 | } else { | |
1026 | av_log(ac->avctx, AV_LOG_ERROR, | |
1027 | "Invalid bitstream - cannot apply SBR to element type %d\n", id_aac); | |
1028 | sbr_turnoff(sbr); | |
1029 | return get_bits_count(gb) - cnt; | |
1030 | } | |
1031 | if (get_bits1(gb)) { // bs_extended_data | |
1032 | int num_bits_left = get_bits(gb, 4); // bs_extension_size | |
1033 | if (num_bits_left == 15) | |
1034 | num_bits_left += get_bits(gb, 8); // bs_esc_count | |
1035 | ||
1036 | num_bits_left <<= 3; | |
1037 | while (num_bits_left > 7) { | |
1038 | num_bits_left -= 2; | |
1039 | read_sbr_extension(ac, sbr, gb, get_bits(gb, 2), &num_bits_left); // bs_extension_id | |
1040 | } | |
1041 | if (num_bits_left < 0) { | |
1042 | av_log(ac->avctx, AV_LOG_ERROR, "SBR Extension over read.\n"); | |
1043 | } | |
1044 | if (num_bits_left > 0) | |
1045 | skip_bits(gb, num_bits_left); | |
1046 | } | |
1047 | ||
1048 | return get_bits_count(gb) - cnt; | |
1049 | } | |
1050 | ||
1051 | static void sbr_reset(AACContext *ac, SpectralBandReplication *sbr) | |
1052 | { | |
1053 | int err; | |
1054 | err = sbr_make_f_master(ac, sbr, &sbr->spectrum_params); | |
1055 | if (err >= 0) | |
1056 | err = sbr_make_f_derived(ac, sbr); | |
1057 | if (err < 0) { | |
1058 | av_log(ac->avctx, AV_LOG_ERROR, | |
1059 | "SBR reset failed. Switching SBR to pure upsampling mode.\n"); | |
1060 | sbr_turnoff(sbr); | |
1061 | } | |
1062 | } | |
1063 | ||
1064 | /** | |
1065 | * Decode Spectral Band Replication extension data; reference: table 4.55. | |
1066 | * | |
1067 | * @param crc flag indicating the presence of CRC checksum | |
1068 | * @param cnt length of TYPE_FIL syntactic element in bytes | |
1069 | * | |
1070 | * @return Returns number of bytes consumed from the TYPE_FIL element. | |
1071 | */ | |
1072 | int ff_decode_sbr_extension(AACContext *ac, SpectralBandReplication *sbr, | |
1073 | GetBitContext *gb_host, int crc, int cnt, int id_aac) | |
1074 | { | |
1075 | unsigned int num_sbr_bits = 0, num_align_bits; | |
1076 | unsigned bytes_read; | |
1077 | GetBitContext gbc = *gb_host, *gb = &gbc; | |
1078 | skip_bits_long(gb_host, cnt*8 - 4); | |
1079 | ||
1080 | sbr->reset = 0; | |
1081 | ||
1082 | if (!sbr->sample_rate) | |
1083 | sbr->sample_rate = 2 * ac->oc[1].m4ac.sample_rate; //TODO use the nominal sample rate for arbitrary sample rate support | |
1084 | if (!ac->oc[1].m4ac.ext_sample_rate) | |
1085 | ac->oc[1].m4ac.ext_sample_rate = 2 * ac->oc[1].m4ac.sample_rate; | |
1086 | ||
1087 | if (crc) { | |
1088 | skip_bits(gb, 10); // bs_sbr_crc_bits; TODO - implement CRC check | |
1089 | num_sbr_bits += 10; | |
1090 | } | |
1091 | ||
1092 | //Save some state from the previous frame. | |
1093 | sbr->kx[0] = sbr->kx[1]; | |
1094 | sbr->m[0] = sbr->m[1]; | |
1095 | sbr->kx_and_m_pushed = 1; | |
1096 | ||
1097 | num_sbr_bits++; | |
1098 | if (get_bits1(gb)) // bs_header_flag | |
1099 | num_sbr_bits += read_sbr_header(sbr, gb); | |
1100 | ||
1101 | if (sbr->reset) | |
1102 | sbr_reset(ac, sbr); | |
1103 | ||
1104 | if (sbr->start) | |
1105 | num_sbr_bits += read_sbr_data(ac, sbr, gb, id_aac); | |
1106 | ||
1107 | num_align_bits = ((cnt << 3) - 4 - num_sbr_bits) & 7; | |
1108 | bytes_read = ((num_sbr_bits + num_align_bits + 4) >> 3); | |
1109 | ||
1110 | if (bytes_read > cnt) { | |
1111 | av_log(ac->avctx, AV_LOG_ERROR, | |
1112 | "Expected to read %d SBR bytes actually read %d.\n", cnt, bytes_read); | |
1113 | } | |
1114 | return cnt; | |
1115 | } | |
1116 | ||
1117 | /// Dequantization and stereo decoding (14496-3 sp04 p203) | |
1118 | static void sbr_dequant(SpectralBandReplication *sbr, int id_aac) | |
1119 | { | |
1120 | int k, e; | |
1121 | int ch; | |
1122 | ||
1123 | if (id_aac == TYPE_CPE && sbr->bs_coupling) { | |
1124 | float alpha = sbr->data[0].bs_amp_res ? 1.0f : 0.5f; | |
1125 | float pan_offset = sbr->data[0].bs_amp_res ? 12.0f : 24.0f; | |
1126 | for (e = 1; e <= sbr->data[0].bs_num_env; e++) { | |
1127 | for (k = 0; k < sbr->n[sbr->data[0].bs_freq_res[e]]; k++) { | |
1128 | float temp1 = exp2f(sbr->data[0].env_facs[e][k] * alpha + 7.0f); | |
1129 | float temp2 = exp2f((pan_offset - sbr->data[1].env_facs[e][k]) * alpha); | |
1130 | float fac; | |
1131 | if (temp1 > 1E20) { | |
1132 | av_log(NULL, AV_LOG_ERROR, "envelope scalefactor overflow in dequant\n"); | |
1133 | temp1 = 1; | |
1134 | } | |
1135 | fac = temp1 / (1.0f + temp2); | |
1136 | sbr->data[0].env_facs[e][k] = fac; | |
1137 | sbr->data[1].env_facs[e][k] = fac * temp2; | |
1138 | } | |
1139 | } | |
1140 | for (e = 1; e <= sbr->data[0].bs_num_noise; e++) { | |
1141 | for (k = 0; k < sbr->n_q; k++) { | |
1142 | float temp1 = exp2f(NOISE_FLOOR_OFFSET - sbr->data[0].noise_facs[e][k] + 1); | |
1143 | float temp2 = exp2f(12 - sbr->data[1].noise_facs[e][k]); | |
1144 | float fac; | |
1145 | if (temp1 > 1E20) { | |
1146 | av_log(NULL, AV_LOG_ERROR, "envelope scalefactor overflow in dequant\n"); | |
1147 | temp1 = 1; | |
1148 | } | |
1149 | fac = temp1 / (1.0f + temp2); | |
1150 | sbr->data[0].noise_facs[e][k] = fac; | |
1151 | sbr->data[1].noise_facs[e][k] = fac * temp2; | |
1152 | } | |
1153 | } | |
1154 | } else { // SCE or one non-coupled CPE | |
1155 | for (ch = 0; ch < (id_aac == TYPE_CPE) + 1; ch++) { | |
1156 | float alpha = sbr->data[ch].bs_amp_res ? 1.0f : 0.5f; | |
1157 | for (e = 1; e <= sbr->data[ch].bs_num_env; e++) | |
1158 | for (k = 0; k < sbr->n[sbr->data[ch].bs_freq_res[e]]; k++){ | |
1159 | sbr->data[ch].env_facs[e][k] = | |
1160 | exp2f(alpha * sbr->data[ch].env_facs[e][k] + 6.0f); | |
1161 | if (sbr->data[ch].env_facs[e][k] > 1E20) { | |
1162 | av_log(NULL, AV_LOG_ERROR, "envelope scalefactor overflow in dequant\n"); | |
1163 | sbr->data[ch].env_facs[e][k] = 1; | |
1164 | } | |
1165 | } | |
1166 | ||
1167 | for (e = 1; e <= sbr->data[ch].bs_num_noise; e++) | |
1168 | for (k = 0; k < sbr->n_q; k++) | |
1169 | sbr->data[ch].noise_facs[e][k] = | |
1170 | exp2f(NOISE_FLOOR_OFFSET - sbr->data[ch].noise_facs[e][k]); | |
1171 | } | |
1172 | } | |
1173 | } | |
1174 | ||
1175 | /** | |
1176 | * Analysis QMF Bank (14496-3 sp04 p206) | |
1177 | * | |
1178 | * @param x pointer to the beginning of the first sample window | |
1179 | * @param W array of complex-valued samples split into subbands | |
1180 | */ | |
1181 | #ifndef sbr_qmf_analysis | |
1182 | static void sbr_qmf_analysis(AVFloatDSPContext *dsp, FFTContext *mdct, | |
1183 | SBRDSPContext *sbrdsp, const float *in, float *x, | |
1184 | float z[320], float W[2][32][32][2], int buf_idx) | |
1185 | { | |
1186 | int i; | |
1187 | memcpy(x , x+1024, (320-32)*sizeof(x[0])); | |
1188 | memcpy(x+288, in, 1024*sizeof(x[0])); | |
1189 | for (i = 0; i < 32; i++) { // numTimeSlots*RATE = 16*2 as 960 sample frames | |
1190 | // are not supported | |
1191 | dsp->vector_fmul_reverse(z, sbr_qmf_window_ds, x, 320); | |
1192 | sbrdsp->sum64x5(z); | |
1193 | sbrdsp->qmf_pre_shuffle(z); | |
1194 | mdct->imdct_half(mdct, z, z+64); | |
1195 | sbrdsp->qmf_post_shuffle(W[buf_idx][i], z); | |
1196 | x += 32; | |
1197 | } | |
1198 | } | |
1199 | #endif | |
1200 | ||
1201 | /** | |
1202 | * Synthesis QMF Bank (14496-3 sp04 p206) and Downsampled Synthesis QMF Bank | |
1203 | * (14496-3 sp04 p206) | |
1204 | */ | |
1205 | #ifndef sbr_qmf_synthesis | |
1206 | static void sbr_qmf_synthesis(FFTContext *mdct, | |
1207 | SBRDSPContext *sbrdsp, AVFloatDSPContext *dsp, | |
1208 | float *out, float X[2][38][64], | |
1209 | float mdct_buf[2][64], | |
1210 | float *v0, int *v_off, const unsigned int div) | |
1211 | { | |
1212 | int i, n; | |
1213 | const float *sbr_qmf_window = div ? sbr_qmf_window_ds : sbr_qmf_window_us; | |
1214 | const int step = 128 >> div; | |
1215 | float *v; | |
1216 | for (i = 0; i < 32; i++) { | |
1217 | if (*v_off < step) { | |
1218 | int saved_samples = (1280 - 128) >> div; | |
1219 | memcpy(&v0[SBR_SYNTHESIS_BUF_SIZE - saved_samples], v0, saved_samples * sizeof(float)); | |
1220 | *v_off = SBR_SYNTHESIS_BUF_SIZE - saved_samples - step; | |
1221 | } else { | |
1222 | *v_off -= step; | |
1223 | } | |
1224 | v = v0 + *v_off; | |
1225 | if (div) { | |
1226 | for (n = 0; n < 32; n++) { | |
1227 | X[0][i][ n] = -X[0][i][n]; | |
1228 | X[0][i][32+n] = X[1][i][31-n]; | |
1229 | } | |
1230 | mdct->imdct_half(mdct, mdct_buf[0], X[0][i]); | |
1231 | sbrdsp->qmf_deint_neg(v, mdct_buf[0]); | |
1232 | } else { | |
1233 | sbrdsp->neg_odd_64(X[1][i]); | |
1234 | mdct->imdct_half(mdct, mdct_buf[0], X[0][i]); | |
1235 | mdct->imdct_half(mdct, mdct_buf[1], X[1][i]); | |
1236 | sbrdsp->qmf_deint_bfly(v, mdct_buf[1], mdct_buf[0]); | |
1237 | } | |
1238 | dsp->vector_fmul (out, v , sbr_qmf_window , 64 >> div); | |
1239 | dsp->vector_fmul_add(out, v + ( 192 >> div), sbr_qmf_window + ( 64 >> div), out , 64 >> div); | |
1240 | dsp->vector_fmul_add(out, v + ( 256 >> div), sbr_qmf_window + (128 >> div), out , 64 >> div); | |
1241 | dsp->vector_fmul_add(out, v + ( 448 >> div), sbr_qmf_window + (192 >> div), out , 64 >> div); | |
1242 | dsp->vector_fmul_add(out, v + ( 512 >> div), sbr_qmf_window + (256 >> div), out , 64 >> div); | |
1243 | dsp->vector_fmul_add(out, v + ( 704 >> div), sbr_qmf_window + (320 >> div), out , 64 >> div); | |
1244 | dsp->vector_fmul_add(out, v + ( 768 >> div), sbr_qmf_window + (384 >> div), out , 64 >> div); | |
1245 | dsp->vector_fmul_add(out, v + ( 960 >> div), sbr_qmf_window + (448 >> div), out , 64 >> div); | |
1246 | dsp->vector_fmul_add(out, v + (1024 >> div), sbr_qmf_window + (512 >> div), out , 64 >> div); | |
1247 | dsp->vector_fmul_add(out, v + (1216 >> div), sbr_qmf_window + (576 >> div), out , 64 >> div); | |
1248 | out += 64 >> div; | |
1249 | } | |
1250 | } | |
1251 | #endif | |
1252 | ||
1253 | /** High Frequency Generation (14496-3 sp04 p214+) and Inverse Filtering | |
1254 | * (14496-3 sp04 p214) | |
1255 | * Warning: This routine does not seem numerically stable. | |
1256 | */ | |
1257 | static void sbr_hf_inverse_filter(SBRDSPContext *dsp, | |
1258 | float (*alpha0)[2], float (*alpha1)[2], | |
1259 | const float X_low[32][40][2], int k0) | |
1260 | { | |
1261 | int k; | |
1262 | for (k = 0; k < k0; k++) { | |
1263 | LOCAL_ALIGNED_16(float, phi, [3], [2][2]); | |
1264 | float dk; | |
1265 | ||
1266 | dsp->autocorrelate(X_low[k], phi); | |
1267 | ||
1268 | dk = phi[2][1][0] * phi[1][0][0] - | |
1269 | (phi[1][1][0] * phi[1][1][0] + phi[1][1][1] * phi[1][1][1]) / 1.000001f; | |
1270 | ||
1271 | if (!dk) { | |
1272 | alpha1[k][0] = 0; | |
1273 | alpha1[k][1] = 0; | |
1274 | } else { | |
1275 | float temp_real, temp_im; | |
1276 | temp_real = phi[0][0][0] * phi[1][1][0] - | |
1277 | phi[0][0][1] * phi[1][1][1] - | |
1278 | phi[0][1][0] * phi[1][0][0]; | |
1279 | temp_im = phi[0][0][0] * phi[1][1][1] + | |
1280 | phi[0][0][1] * phi[1][1][0] - | |
1281 | phi[0][1][1] * phi[1][0][0]; | |
1282 | ||
1283 | alpha1[k][0] = temp_real / dk; | |
1284 | alpha1[k][1] = temp_im / dk; | |
1285 | } | |
1286 | ||
1287 | if (!phi[1][0][0]) { | |
1288 | alpha0[k][0] = 0; | |
1289 | alpha0[k][1] = 0; | |
1290 | } else { | |
1291 | float temp_real, temp_im; | |
1292 | temp_real = phi[0][0][0] + alpha1[k][0] * phi[1][1][0] + | |
1293 | alpha1[k][1] * phi[1][1][1]; | |
1294 | temp_im = phi[0][0][1] + alpha1[k][1] * phi[1][1][0] - | |
1295 | alpha1[k][0] * phi[1][1][1]; | |
1296 | ||
1297 | alpha0[k][0] = -temp_real / phi[1][0][0]; | |
1298 | alpha0[k][1] = -temp_im / phi[1][0][0]; | |
1299 | } | |
1300 | ||
1301 | if (alpha1[k][0] * alpha1[k][0] + alpha1[k][1] * alpha1[k][1] >= 16.0f || | |
1302 | alpha0[k][0] * alpha0[k][0] + alpha0[k][1] * alpha0[k][1] >= 16.0f) { | |
1303 | alpha1[k][0] = 0; | |
1304 | alpha1[k][1] = 0; | |
1305 | alpha0[k][0] = 0; | |
1306 | alpha0[k][1] = 0; | |
1307 | } | |
1308 | } | |
1309 | } | |
1310 | ||
1311 | /// Chirp Factors (14496-3 sp04 p214) | |
1312 | static void sbr_chirp(SpectralBandReplication *sbr, SBRData *ch_data) | |
1313 | { | |
1314 | int i; | |
1315 | float new_bw; | |
1316 | static const float bw_tab[] = { 0.0f, 0.75f, 0.9f, 0.98f }; | |
1317 | ||
1318 | for (i = 0; i < sbr->n_q; i++) { | |
1319 | if (ch_data->bs_invf_mode[0][i] + ch_data->bs_invf_mode[1][i] == 1) { | |
1320 | new_bw = 0.6f; | |
1321 | } else | |
1322 | new_bw = bw_tab[ch_data->bs_invf_mode[0][i]]; | |
1323 | ||
1324 | if (new_bw < ch_data->bw_array[i]) { | |
1325 | new_bw = 0.75f * new_bw + 0.25f * ch_data->bw_array[i]; | |
1326 | } else | |
1327 | new_bw = 0.90625f * new_bw + 0.09375f * ch_data->bw_array[i]; | |
1328 | ch_data->bw_array[i] = new_bw < 0.015625f ? 0.0f : new_bw; | |
1329 | } | |
1330 | } | |
1331 | ||
1332 | /// Generate the subband filtered lowband | |
1333 | static int sbr_lf_gen(AACContext *ac, SpectralBandReplication *sbr, | |
1334 | float X_low[32][40][2], const float W[2][32][32][2], | |
1335 | int buf_idx) | |
1336 | { | |
1337 | int i, k; | |
1338 | const int t_HFGen = 8; | |
1339 | const int i_f = 32; | |
1340 | memset(X_low, 0, 32*sizeof(*X_low)); | |
1341 | for (k = 0; k < sbr->kx[1]; k++) { | |
1342 | for (i = t_HFGen; i < i_f + t_HFGen; i++) { | |
1343 | X_low[k][i][0] = W[buf_idx][i - t_HFGen][k][0]; | |
1344 | X_low[k][i][1] = W[buf_idx][i - t_HFGen][k][1]; | |
1345 | } | |
1346 | } | |
1347 | buf_idx = 1-buf_idx; | |
1348 | for (k = 0; k < sbr->kx[0]; k++) { | |
1349 | for (i = 0; i < t_HFGen; i++) { | |
1350 | X_low[k][i][0] = W[buf_idx][i + i_f - t_HFGen][k][0]; | |
1351 | X_low[k][i][1] = W[buf_idx][i + i_f - t_HFGen][k][1]; | |
1352 | } | |
1353 | } | |
1354 | return 0; | |
1355 | } | |
1356 | ||
1357 | /// High Frequency Generator (14496-3 sp04 p215) | |
1358 | static int sbr_hf_gen(AACContext *ac, SpectralBandReplication *sbr, | |
1359 | float X_high[64][40][2], const float X_low[32][40][2], | |
1360 | const float (*alpha0)[2], const float (*alpha1)[2], | |
1361 | const float bw_array[5], const uint8_t *t_env, | |
1362 | int bs_num_env) | |
1363 | { | |
1364 | int j, x; | |
1365 | int g = 0; | |
1366 | int k = sbr->kx[1]; | |
1367 | for (j = 0; j < sbr->num_patches; j++) { | |
1368 | for (x = 0; x < sbr->patch_num_subbands[j]; x++, k++) { | |
1369 | const int p = sbr->patch_start_subband[j] + x; | |
1370 | while (g <= sbr->n_q && k >= sbr->f_tablenoise[g]) | |
1371 | g++; | |
1372 | g--; | |
1373 | ||
1374 | if (g < 0) { | |
1375 | av_log(ac->avctx, AV_LOG_ERROR, | |
1376 | "ERROR : no subband found for frequency %d\n", k); | |
1377 | return -1; | |
1378 | } | |
1379 | ||
1380 | sbr->dsp.hf_gen(X_high[k] + ENVELOPE_ADJUSTMENT_OFFSET, | |
1381 | X_low[p] + ENVELOPE_ADJUSTMENT_OFFSET, | |
1382 | alpha0[p], alpha1[p], bw_array[g], | |
1383 | 2 * t_env[0], 2 * t_env[bs_num_env]); | |
1384 | } | |
1385 | } | |
1386 | if (k < sbr->m[1] + sbr->kx[1]) | |
1387 | memset(X_high + k, 0, (sbr->m[1] + sbr->kx[1] - k) * sizeof(*X_high)); | |
1388 | ||
1389 | return 0; | |
1390 | } | |
1391 | ||
1392 | /// Generate the subband filtered lowband | |
1393 | static int sbr_x_gen(SpectralBandReplication *sbr, float X[2][38][64], | |
1394 | const float Y0[38][64][2], const float Y1[38][64][2], | |
1395 | const float X_low[32][40][2], int ch) | |
1396 | { | |
1397 | int k, i; | |
1398 | const int i_f = 32; | |
1399 | const int i_Temp = FFMAX(2*sbr->data[ch].t_env_num_env_old - i_f, 0); | |
1400 | memset(X, 0, 2*sizeof(*X)); | |
1401 | for (k = 0; k < sbr->kx[0]; k++) { | |
1402 | for (i = 0; i < i_Temp; i++) { | |
1403 | X[0][i][k] = X_low[k][i + ENVELOPE_ADJUSTMENT_OFFSET][0]; | |
1404 | X[1][i][k] = X_low[k][i + ENVELOPE_ADJUSTMENT_OFFSET][1]; | |
1405 | } | |
1406 | } | |
1407 | for (; k < sbr->kx[0] + sbr->m[0]; k++) { | |
1408 | for (i = 0; i < i_Temp; i++) { | |
1409 | X[0][i][k] = Y0[i + i_f][k][0]; | |
1410 | X[1][i][k] = Y0[i + i_f][k][1]; | |
1411 | } | |
1412 | } | |
1413 | ||
1414 | for (k = 0; k < sbr->kx[1]; k++) { | |
1415 | for (i = i_Temp; i < 38; i++) { | |
1416 | X[0][i][k] = X_low[k][i + ENVELOPE_ADJUSTMENT_OFFSET][0]; | |
1417 | X[1][i][k] = X_low[k][i + ENVELOPE_ADJUSTMENT_OFFSET][1]; | |
1418 | } | |
1419 | } | |
1420 | for (; k < sbr->kx[1] + sbr->m[1]; k++) { | |
1421 | for (i = i_Temp; i < i_f; i++) { | |
1422 | X[0][i][k] = Y1[i][k][0]; | |
1423 | X[1][i][k] = Y1[i][k][1]; | |
1424 | } | |
1425 | } | |
1426 | return 0; | |
1427 | } | |
1428 | ||
1429 | /** High Frequency Adjustment (14496-3 sp04 p217) and Mapping | |
1430 | * (14496-3 sp04 p217) | |
1431 | */ | |
1432 | static int sbr_mapping(AACContext *ac, SpectralBandReplication *sbr, | |
1433 | SBRData *ch_data, int e_a[2]) | |
1434 | { | |
1435 | int e, i, m; | |
1436 | ||
1437 | memset(ch_data->s_indexmapped[1], 0, 7*sizeof(ch_data->s_indexmapped[1])); | |
1438 | for (e = 0; e < ch_data->bs_num_env; e++) { | |
1439 | const unsigned int ilim = sbr->n[ch_data->bs_freq_res[e + 1]]; | |
1440 | uint16_t *table = ch_data->bs_freq_res[e + 1] ? sbr->f_tablehigh : sbr->f_tablelow; | |
1441 | int k; | |
1442 | ||
1443 | if (sbr->kx[1] != table[0]) { | |
1444 | av_log(ac->avctx, AV_LOG_ERROR, "kx != f_table{high,low}[0]. " | |
1445 | "Derived frequency tables were not regenerated.\n"); | |
1446 | sbr_turnoff(sbr); | |
1447 | return AVERROR_BUG; | |
1448 | } | |
1449 | for (i = 0; i < ilim; i++) | |
1450 | for (m = table[i]; m < table[i + 1]; m++) | |
1451 | sbr->e_origmapped[e][m - sbr->kx[1]] = ch_data->env_facs[e+1][i]; | |
1452 | ||
1453 | // ch_data->bs_num_noise > 1 => 2 noise floors | |
1454 | k = (ch_data->bs_num_noise > 1) && (ch_data->t_env[e] >= ch_data->t_q[1]); | |
1455 | for (i = 0; i < sbr->n_q; i++) | |
1456 | for (m = sbr->f_tablenoise[i]; m < sbr->f_tablenoise[i + 1]; m++) | |
1457 | sbr->q_mapped[e][m - sbr->kx[1]] = ch_data->noise_facs[k+1][i]; | |
1458 | ||
1459 | for (i = 0; i < sbr->n[1]; i++) { | |
1460 | if (ch_data->bs_add_harmonic_flag) { | |
1461 | const unsigned int m_midpoint = | |
1462 | (sbr->f_tablehigh[i] + sbr->f_tablehigh[i + 1]) >> 1; | |
1463 | ||
1464 | ch_data->s_indexmapped[e + 1][m_midpoint - sbr->kx[1]] = ch_data->bs_add_harmonic[i] * | |
1465 | (e >= e_a[1] || (ch_data->s_indexmapped[0][m_midpoint - sbr->kx[1]] == 1)); | |
1466 | } | |
1467 | } | |
1468 | ||
1469 | for (i = 0; i < ilim; i++) { | |
1470 | int additional_sinusoid_present = 0; | |
1471 | for (m = table[i]; m < table[i + 1]; m++) { | |
1472 | if (ch_data->s_indexmapped[e + 1][m - sbr->kx[1]]) { | |
1473 | additional_sinusoid_present = 1; | |
1474 | break; | |
1475 | } | |
1476 | } | |
1477 | memset(&sbr->s_mapped[e][table[i] - sbr->kx[1]], additional_sinusoid_present, | |
1478 | (table[i + 1] - table[i]) * sizeof(sbr->s_mapped[e][0])); | |
1479 | } | |
1480 | } | |
1481 | ||
1482 | memcpy(ch_data->s_indexmapped[0], ch_data->s_indexmapped[ch_data->bs_num_env], sizeof(ch_data->s_indexmapped[0])); | |
1483 | return 0; | |
1484 | } | |
1485 | ||
1486 | /// Estimation of current envelope (14496-3 sp04 p218) | |
1487 | static void sbr_env_estimate(float (*e_curr)[48], float X_high[64][40][2], | |
1488 | SpectralBandReplication *sbr, SBRData *ch_data) | |
1489 | { | |
1490 | int e, m; | |
1491 | int kx1 = sbr->kx[1]; | |
1492 | ||
1493 | if (sbr->bs_interpol_freq) { | |
1494 | for (e = 0; e < ch_data->bs_num_env; e++) { | |
1495 | const float recip_env_size = 0.5f / (ch_data->t_env[e + 1] - ch_data->t_env[e]); | |
1496 | int ilb = ch_data->t_env[e] * 2 + ENVELOPE_ADJUSTMENT_OFFSET; | |
1497 | int iub = ch_data->t_env[e + 1] * 2 + ENVELOPE_ADJUSTMENT_OFFSET; | |
1498 | ||
1499 | for (m = 0; m < sbr->m[1]; m++) { | |
1500 | float sum = sbr->dsp.sum_square(X_high[m+kx1] + ilb, iub - ilb); | |
1501 | e_curr[e][m] = sum * recip_env_size; | |
1502 | } | |
1503 | } | |
1504 | } else { | |
1505 | int k, p; | |
1506 | ||
1507 | for (e = 0; e < ch_data->bs_num_env; e++) { | |
1508 | const int env_size = 2 * (ch_data->t_env[e + 1] - ch_data->t_env[e]); | |
1509 | int ilb = ch_data->t_env[e] * 2 + ENVELOPE_ADJUSTMENT_OFFSET; | |
1510 | int iub = ch_data->t_env[e + 1] * 2 + ENVELOPE_ADJUSTMENT_OFFSET; | |
1511 | const uint16_t *table = ch_data->bs_freq_res[e + 1] ? sbr->f_tablehigh : sbr->f_tablelow; | |
1512 | ||
1513 | for (p = 0; p < sbr->n[ch_data->bs_freq_res[e + 1]]; p++) { | |
1514 | float sum = 0.0f; | |
1515 | const int den = env_size * (table[p + 1] - table[p]); | |
1516 | ||
1517 | for (k = table[p]; k < table[p + 1]; k++) { | |
1518 | sum += sbr->dsp.sum_square(X_high[k] + ilb, iub - ilb); | |
1519 | } | |
1520 | sum /= den; | |
1521 | for (k = table[p]; k < table[p + 1]; k++) { | |
1522 | e_curr[e][k - kx1] = sum; | |
1523 | } | |
1524 | } | |
1525 | } | |
1526 | } | |
1527 | } | |
1528 | ||
1529 | /** | |
1530 | * Calculation of levels of additional HF signal components (14496-3 sp04 p219) | |
1531 | * and Calculation of gain (14496-3 sp04 p219) | |
1532 | */ | |
1533 | static void sbr_gain_calc(AACContext *ac, SpectralBandReplication *sbr, | |
1534 | SBRData *ch_data, const int e_a[2]) | |
1535 | { | |
1536 | int e, k, m; | |
1537 | // max gain limits : -3dB, 0dB, 3dB, inf dB (limiter off) | |
1538 | static const float limgain[4] = { 0.70795, 1.0, 1.41254, 10000000000 }; | |
1539 | ||
1540 | for (e = 0; e < ch_data->bs_num_env; e++) { | |
1541 | int delta = !((e == e_a[1]) || (e == e_a[0])); | |
1542 | for (k = 0; k < sbr->n_lim; k++) { | |
1543 | float gain_boost, gain_max; | |
1544 | float sum[2] = { 0.0f, 0.0f }; | |
1545 | for (m = sbr->f_tablelim[k] - sbr->kx[1]; m < sbr->f_tablelim[k + 1] - sbr->kx[1]; m++) { | |
1546 | const float temp = sbr->e_origmapped[e][m] / (1.0f + sbr->q_mapped[e][m]); | |
1547 | sbr->q_m[e][m] = sqrtf(temp * sbr->q_mapped[e][m]); | |
1548 | sbr->s_m[e][m] = sqrtf(temp * ch_data->s_indexmapped[e + 1][m]); | |
1549 | if (!sbr->s_mapped[e][m]) { | |
1550 | sbr->gain[e][m] = sqrtf(sbr->e_origmapped[e][m] / | |
1551 | ((1.0f + sbr->e_curr[e][m]) * | |
1552 | (1.0f + sbr->q_mapped[e][m] * delta))); | |
1553 | } else { | |
1554 | sbr->gain[e][m] = sqrtf(sbr->e_origmapped[e][m] * sbr->q_mapped[e][m] / | |
1555 | ((1.0f + sbr->e_curr[e][m]) * | |
1556 | (1.0f + sbr->q_mapped[e][m]))); | |
1557 | } | |
1558 | } | |
1559 | for (m = sbr->f_tablelim[k] - sbr->kx[1]; m < sbr->f_tablelim[k + 1] - sbr->kx[1]; m++) { | |
1560 | sum[0] += sbr->e_origmapped[e][m]; | |
1561 | sum[1] += sbr->e_curr[e][m]; | |
1562 | } | |
1563 | gain_max = limgain[sbr->bs_limiter_gains] * sqrtf((FLT_EPSILON + sum[0]) / (FLT_EPSILON + sum[1])); | |
1564 | gain_max = FFMIN(100000.f, gain_max); | |
1565 | for (m = sbr->f_tablelim[k] - sbr->kx[1]; m < sbr->f_tablelim[k + 1] - sbr->kx[1]; m++) { | |
1566 | float q_m_max = sbr->q_m[e][m] * gain_max / sbr->gain[e][m]; | |
1567 | sbr->q_m[e][m] = FFMIN(sbr->q_m[e][m], q_m_max); | |
1568 | sbr->gain[e][m] = FFMIN(sbr->gain[e][m], gain_max); | |
1569 | } | |
1570 | sum[0] = sum[1] = 0.0f; | |
1571 | for (m = sbr->f_tablelim[k] - sbr->kx[1]; m < sbr->f_tablelim[k + 1] - sbr->kx[1]; m++) { | |
1572 | sum[0] += sbr->e_origmapped[e][m]; | |
1573 | sum[1] += sbr->e_curr[e][m] * sbr->gain[e][m] * sbr->gain[e][m] | |
1574 | + sbr->s_m[e][m] * sbr->s_m[e][m] | |
1575 | + (delta && !sbr->s_m[e][m]) * sbr->q_m[e][m] * sbr->q_m[e][m]; | |
1576 | } | |
1577 | gain_boost = sqrtf((FLT_EPSILON + sum[0]) / (FLT_EPSILON + sum[1])); | |
1578 | gain_boost = FFMIN(1.584893192f, gain_boost); | |
1579 | for (m = sbr->f_tablelim[k] - sbr->kx[1]; m < sbr->f_tablelim[k + 1] - sbr->kx[1]; m++) { | |
1580 | sbr->gain[e][m] *= gain_boost; | |
1581 | sbr->q_m[e][m] *= gain_boost; | |
1582 | sbr->s_m[e][m] *= gain_boost; | |
1583 | } | |
1584 | } | |
1585 | } | |
1586 | } | |
1587 | ||
1588 | /// Assembling HF Signals (14496-3 sp04 p220) | |
1589 | static void sbr_hf_assemble(float Y1[38][64][2], | |
1590 | const float X_high[64][40][2], | |
1591 | SpectralBandReplication *sbr, SBRData *ch_data, | |
1592 | const int e_a[2]) | |
1593 | { | |
1594 | int e, i, j, m; | |
1595 | const int h_SL = 4 * !sbr->bs_smoothing_mode; | |
1596 | const int kx = sbr->kx[1]; | |
1597 | const int m_max = sbr->m[1]; | |
1598 | static const float h_smooth[5] = { | |
1599 | 0.33333333333333, | |
1600 | 0.30150283239582, | |
1601 | 0.21816949906249, | |
1602 | 0.11516383427084, | |
1603 | 0.03183050093751, | |
1604 | }; | |
1605 | float (*g_temp)[48] = ch_data->g_temp, (*q_temp)[48] = ch_data->q_temp; | |
1606 | int indexnoise = ch_data->f_indexnoise; | |
1607 | int indexsine = ch_data->f_indexsine; | |
1608 | ||
1609 | if (sbr->reset) { | |
1610 | for (i = 0; i < h_SL; i++) { | |
1611 | memcpy(g_temp[i + 2*ch_data->t_env[0]], sbr->gain[0], m_max * sizeof(sbr->gain[0][0])); | |
1612 | memcpy(q_temp[i + 2*ch_data->t_env[0]], sbr->q_m[0], m_max * sizeof(sbr->q_m[0][0])); | |
1613 | } | |
1614 | } else if (h_SL) { | |
f6fa7814 DM |
1615 | for (i = 0; i < 4; i++) { |
1616 | memcpy(g_temp[i + 2 * ch_data->t_env[0]], | |
1617 | g_temp[i + 2 * ch_data->t_env_num_env_old], | |
1618 | sizeof(g_temp[0])); | |
1619 | memcpy(q_temp[i + 2 * ch_data->t_env[0]], | |
1620 | q_temp[i + 2 * ch_data->t_env_num_env_old], | |
1621 | sizeof(q_temp[0])); | |
1622 | } | |
2ba45a60 DM |
1623 | } |
1624 | ||
1625 | for (e = 0; e < ch_data->bs_num_env; e++) { | |
1626 | for (i = 2 * ch_data->t_env[e]; i < 2 * ch_data->t_env[e + 1]; i++) { | |
1627 | memcpy(g_temp[h_SL + i], sbr->gain[e], m_max * sizeof(sbr->gain[0][0])); | |
1628 | memcpy(q_temp[h_SL + i], sbr->q_m[e], m_max * sizeof(sbr->q_m[0][0])); | |
1629 | } | |
1630 | } | |
1631 | ||
1632 | for (e = 0; e < ch_data->bs_num_env; e++) { | |
1633 | for (i = 2 * ch_data->t_env[e]; i < 2 * ch_data->t_env[e + 1]; i++) { | |
1634 | LOCAL_ALIGNED_16(float, g_filt_tab, [48]); | |
1635 | LOCAL_ALIGNED_16(float, q_filt_tab, [48]); | |
1636 | float *g_filt, *q_filt; | |
1637 | ||
1638 | if (h_SL && e != e_a[0] && e != e_a[1]) { | |
1639 | g_filt = g_filt_tab; | |
1640 | q_filt = q_filt_tab; | |
1641 | for (m = 0; m < m_max; m++) { | |
1642 | const int idx1 = i + h_SL; | |
1643 | g_filt[m] = 0.0f; | |
1644 | q_filt[m] = 0.0f; | |
1645 | for (j = 0; j <= h_SL; j++) { | |
1646 | g_filt[m] += g_temp[idx1 - j][m] * h_smooth[j]; | |
1647 | q_filt[m] += q_temp[idx1 - j][m] * h_smooth[j]; | |
1648 | } | |
1649 | } | |
1650 | } else { | |
1651 | g_filt = g_temp[i + h_SL]; | |
1652 | q_filt = q_temp[i]; | |
1653 | } | |
1654 | ||
1655 | sbr->dsp.hf_g_filt(Y1[i] + kx, X_high + kx, g_filt, m_max, | |
1656 | i + ENVELOPE_ADJUSTMENT_OFFSET); | |
1657 | ||
1658 | if (e != e_a[0] && e != e_a[1]) { | |
1659 | sbr->dsp.hf_apply_noise[indexsine](Y1[i] + kx, sbr->s_m[e], | |
1660 | q_filt, indexnoise, | |
1661 | kx, m_max); | |
1662 | } else { | |
1663 | int idx = indexsine&1; | |
1664 | int A = (1-((indexsine+(kx & 1))&2)); | |
1665 | int B = (A^(-idx)) + idx; | |
1666 | float *out = &Y1[i][kx][idx]; | |
1667 | float *in = sbr->s_m[e]; | |
1668 | for (m = 0; m+1 < m_max; m+=2) { | |
1669 | out[2*m ] += in[m ] * A; | |
1670 | out[2*m+2] += in[m+1] * B; | |
1671 | } | |
1672 | if(m_max&1) | |
1673 | out[2*m ] += in[m ] * A; | |
1674 | } | |
1675 | indexnoise = (indexnoise + m_max) & 0x1ff; | |
1676 | indexsine = (indexsine + 1) & 3; | |
1677 | } | |
1678 | } | |
1679 | ch_data->f_indexnoise = indexnoise; | |
1680 | ch_data->f_indexsine = indexsine; | |
1681 | } | |
1682 | ||
1683 | void ff_sbr_apply(AACContext *ac, SpectralBandReplication *sbr, int id_aac, | |
1684 | float* L, float* R) | |
1685 | { | |
1686 | int downsampled = ac->oc[1].m4ac.ext_sample_rate < sbr->sample_rate; | |
1687 | int ch; | |
1688 | int nch = (id_aac == TYPE_CPE) ? 2 : 1; | |
1689 | int err; | |
1690 | ||
1691 | if (!sbr->kx_and_m_pushed) { | |
1692 | sbr->kx[0] = sbr->kx[1]; | |
1693 | sbr->m[0] = sbr->m[1]; | |
1694 | } else { | |
1695 | sbr->kx_and_m_pushed = 0; | |
1696 | } | |
1697 | ||
1698 | if (sbr->start) { | |
1699 | sbr_dequant(sbr, id_aac); | |
1700 | } | |
1701 | for (ch = 0; ch < nch; ch++) { | |
1702 | /* decode channel */ | |
f6fa7814 | 1703 | sbr_qmf_analysis(ac->fdsp, &sbr->mdct_ana, &sbr->dsp, ch ? R : L, sbr->data[ch].analysis_filterbank_samples, |
2ba45a60 DM |
1704 | (float*)sbr->qmf_filter_scratch, |
1705 | sbr->data[ch].W, sbr->data[ch].Ypos); | |
1706 | sbr->c.sbr_lf_gen(ac, sbr, sbr->X_low, | |
1707 | (const float (*)[32][32][2]) sbr->data[ch].W, | |
1708 | sbr->data[ch].Ypos); | |
1709 | sbr->data[ch].Ypos ^= 1; | |
1710 | if (sbr->start) { | |
1711 | sbr->c.sbr_hf_inverse_filter(&sbr->dsp, sbr->alpha0, sbr->alpha1, | |
1712 | (const float (*)[40][2]) sbr->X_low, sbr->k[0]); | |
1713 | sbr_chirp(sbr, &sbr->data[ch]); | |
1714 | sbr_hf_gen(ac, sbr, sbr->X_high, | |
1715 | (const float (*)[40][2]) sbr->X_low, | |
1716 | (const float (*)[2]) sbr->alpha0, | |
1717 | (const float (*)[2]) sbr->alpha1, | |
1718 | sbr->data[ch].bw_array, sbr->data[ch].t_env, | |
1719 | sbr->data[ch].bs_num_env); | |
1720 | ||
1721 | // hf_adj | |
1722 | err = sbr_mapping(ac, sbr, &sbr->data[ch], sbr->data[ch].e_a); | |
1723 | if (!err) { | |
1724 | sbr_env_estimate(sbr->e_curr, sbr->X_high, sbr, &sbr->data[ch]); | |
1725 | sbr_gain_calc(ac, sbr, &sbr->data[ch], sbr->data[ch].e_a); | |
1726 | sbr->c.sbr_hf_assemble(sbr->data[ch].Y[sbr->data[ch].Ypos], | |
1727 | (const float (*)[40][2]) sbr->X_high, | |
1728 | sbr, &sbr->data[ch], | |
1729 | sbr->data[ch].e_a); | |
1730 | } | |
1731 | } | |
1732 | ||
1733 | /* synthesis */ | |
1734 | sbr->c.sbr_x_gen(sbr, sbr->X[ch], | |
1735 | (const float (*)[64][2]) sbr->data[ch].Y[1-sbr->data[ch].Ypos], | |
1736 | (const float (*)[64][2]) sbr->data[ch].Y[ sbr->data[ch].Ypos], | |
1737 | (const float (*)[40][2]) sbr->X_low, ch); | |
1738 | } | |
1739 | ||
1740 | if (ac->oc[1].m4ac.ps == 1) { | |
1741 | if (sbr->ps.start) { | |
1742 | ff_ps_apply(ac->avctx, &sbr->ps, sbr->X[0], sbr->X[1], sbr->kx[1] + sbr->m[1]); | |
1743 | } else { | |
1744 | memcpy(sbr->X[1], sbr->X[0], sizeof(sbr->X[0])); | |
1745 | } | |
1746 | nch = 2; | |
1747 | } | |
1748 | ||
f6fa7814 | 1749 | sbr_qmf_synthesis(&sbr->mdct, &sbr->dsp, ac->fdsp, |
2ba45a60 DM |
1750 | L, sbr->X[0], sbr->qmf_filter_scratch, |
1751 | sbr->data[0].synthesis_filterbank_samples, | |
1752 | &sbr->data[0].synthesis_filterbank_samples_offset, | |
1753 | downsampled); | |
1754 | if (nch == 2) | |
f6fa7814 | 1755 | sbr_qmf_synthesis(&sbr->mdct, &sbr->dsp, ac->fdsp, |
2ba45a60 DM |
1756 | R, sbr->X[1], sbr->qmf_filter_scratch, |
1757 | sbr->data[1].synthesis_filterbank_samples, | |
1758 | &sbr->data[1].synthesis_filterbank_samples_offset, | |
1759 | downsampled); | |
1760 | } | |
1761 | ||
1762 | static void aacsbr_func_ptr_init(AACSBRContext *c) | |
1763 | { | |
1764 | c->sbr_lf_gen = sbr_lf_gen; | |
1765 | c->sbr_hf_assemble = sbr_hf_assemble; | |
1766 | c->sbr_x_gen = sbr_x_gen; | |
1767 | c->sbr_hf_inverse_filter = sbr_hf_inverse_filter; | |
1768 | ||
1769 | if(ARCH_MIPS) | |
1770 | ff_aacsbr_func_ptr_init_mips(c); | |
1771 | } |