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| 1 /* |
| 2 * MPEG-4 Parametric Stereo decoding functions |
| 3 * Copyright (c) 2010 Alex Converse <alex.converse@gmail.com> |
| 4 * |
| 5 * This file is part of FFmpeg. |
| 6 * |
| 7 * FFmpeg is free software; you can redistribute it and/or |
| 8 * modify it under the terms of the GNU Lesser General Public |
| 9 * License as published by the Free Software Foundation; either |
| 10 * version 2.1 of the License, or (at your option) any later version. |
| 11 * |
| 12 * FFmpeg is distributed in the hope that it will be useful, |
| 13 * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 15 * Lesser General Public License for more details. |
| 16 * |
| 17 * You should have received a copy of the GNU Lesser General Public |
| 18 * License along with FFmpeg; if not, write to the Free Software |
| 19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| 20 */ |
| 21 |
| 22 #include <stdint.h> |
| 23 #include "libavutil/common.h" |
| 24 #include "libavutil/mathematics.h" |
| 25 #include "avcodec.h" |
| 26 #include "get_bits.h" |
| 27 #include "ps.h" |
| 28 #include "ps_tablegen.h" |
| 29 #include "psdata.c" |
| 30 |
| 31 #define PS_BASELINE 0 //< Operate in Baseline PS mode |
| 32 //< Baseline implies 10 or 20 stereo bands, |
| 33 //< mixing mode A, and no ipd/opd |
| 34 |
| 35 #define numQMFSlots 32 //numTimeSlots * RATE |
| 36 |
| 37 static const int8_t num_env_tab[2][4] = { |
| 38 { 0, 1, 2, 4, }, |
| 39 { 1, 2, 3, 4, }, |
| 40 }; |
| 41 |
| 42 static const int8_t nr_iidicc_par_tab[] = { |
| 43 10, 20, 34, 10, 20, 34, |
| 44 }; |
| 45 |
| 46 static const int8_t nr_iidopd_par_tab[] = { |
| 47 5, 11, 17, 5, 11, 17, |
| 48 }; |
| 49 |
| 50 enum { |
| 51 huff_iid_df1, |
| 52 huff_iid_dt1, |
| 53 huff_iid_df0, |
| 54 huff_iid_dt0, |
| 55 huff_icc_df, |
| 56 huff_icc_dt, |
| 57 huff_ipd_df, |
| 58 huff_ipd_dt, |
| 59 huff_opd_df, |
| 60 huff_opd_dt, |
| 61 }; |
| 62 |
| 63 static const int huff_iid[] = { |
| 64 huff_iid_df0, |
| 65 huff_iid_df1, |
| 66 huff_iid_dt0, |
| 67 huff_iid_dt1, |
| 68 }; |
| 69 |
| 70 static VLC vlc_ps[10]; |
| 71 |
| 72 /** |
| 73 * Read Inter-channel Intensity Difference/Inter-Channel Coherence/ |
| 74 * Inter-channel Phase Difference/Overall Phase Difference parameters from the |
| 75 * bitstream. |
| 76 * |
| 77 * @param avctx contains the current codec context |
| 78 * @param gb pointer to the input bitstream |
| 79 * @param ps pointer to the Parametric Stereo context |
| 80 * @param par pointer to the parameter to be read |
| 81 * @param e envelope to decode |
| 82 * @param dt 1: time delta-coded, 0: frequency delta-coded |
| 83 */ |
| 84 #define READ_PAR_DATA(PAR, OFFSET, MASK, ERR_CONDITION) \ |
| 85 static int read_ ## PAR ## _data(AVCodecContext *avctx, GetBitContext *gb, PSCon
text *ps, \ |
| 86 int8_t (*PAR)[PS_MAX_NR_IIDICC], int table_idx, int e, i
nt dt) \ |
| 87 { \ |
| 88 int b, num = ps->nr_ ## PAR ## _par; \ |
| 89 VLC_TYPE (*vlc_table)[2] = vlc_ps[table_idx].table; \ |
| 90 if (dt) { \ |
| 91 int e_prev = e ? e - 1 : ps->num_env_old - 1; \ |
| 92 e_prev = FFMAX(e_prev, 0); \ |
| 93 for (b = 0; b < num; b++) { \ |
| 94 int val = PAR[e_prev][b] + get_vlc2(gb, vlc_table, 9, 3) - OFFSET; \ |
| 95 if (MASK) val &= MASK; \ |
| 96 PAR[e][b] = val; \ |
| 97 if (ERR_CONDITION) \ |
| 98 goto err; \ |
| 99 } \ |
| 100 } else { \ |
| 101 int val = 0; \ |
| 102 for (b = 0; b < num; b++) { \ |
| 103 val += get_vlc2(gb, vlc_table, 9, 3) - OFFSET; \ |
| 104 if (MASK) val &= MASK; \ |
| 105 PAR[e][b] = val; \ |
| 106 if (ERR_CONDITION) \ |
| 107 goto err; \ |
| 108 } \ |
| 109 } \ |
| 110 return 0; \ |
| 111 err: \ |
| 112 av_log(avctx, AV_LOG_ERROR, "illegal "#PAR"\n"); \ |
| 113 return -1; \ |
| 114 } |
| 115 |
| 116 READ_PAR_DATA(iid, huff_offset[table_idx], 0, FFABS(ps->iid_par[e][b]) > 7
+ 8 * ps->iid_quant) |
| 117 READ_PAR_DATA(icc, huff_offset[table_idx], 0, ps->icc_par[e][b] > 7U) |
| 118 READ_PAR_DATA(ipdopd, 0, 0x07, 0) |
| 119 |
| 120 static int ps_read_extension_data(GetBitContext *gb, PSContext *ps, int ps_exten
sion_id) |
| 121 { |
| 122 int e; |
| 123 int count = get_bits_count(gb); |
| 124 |
| 125 if (ps_extension_id) |
| 126 return 0; |
| 127 |
| 128 ps->enable_ipdopd = get_bits1(gb); |
| 129 if (ps->enable_ipdopd) { |
| 130 for (e = 0; e < ps->num_env; e++) { |
| 131 int dt = get_bits1(gb); |
| 132 read_ipdopd_data(NULL, gb, ps, ps->ipd_par, dt ? huff_ipd_dt : huff_
ipd_df, e, dt); |
| 133 dt = get_bits1(gb); |
| 134 read_ipdopd_data(NULL, gb, ps, ps->opd_par, dt ? huff_opd_dt : huff_
opd_df, e, dt); |
| 135 } |
| 136 } |
| 137 skip_bits1(gb); //reserved_ps |
| 138 return get_bits_count(gb) - count; |
| 139 } |
| 140 |
| 141 static void ipdopd_reset(int8_t *opd_hist, int8_t *ipd_hist) |
| 142 { |
| 143 int i; |
| 144 for (i = 0; i < PS_MAX_NR_IPDOPD; i++) { |
| 145 opd_hist[i] = 0; |
| 146 ipd_hist[i] = 0; |
| 147 } |
| 148 } |
| 149 |
| 150 int ff_ps_read_data(AVCodecContext *avctx, GetBitContext *gb_host, PSContext *ps
, int bits_left) |
| 151 { |
| 152 int e; |
| 153 int bit_count_start = get_bits_count(gb_host); |
| 154 int header; |
| 155 int bits_consumed; |
| 156 GetBitContext gbc = *gb_host, *gb = &gbc; |
| 157 |
| 158 header = get_bits1(gb); |
| 159 if (header) { //enable_ps_header |
| 160 ps->enable_iid = get_bits1(gb); |
| 161 if (ps->enable_iid) { |
| 162 int iid_mode = get_bits(gb, 3); |
| 163 if (iid_mode > 5) { |
| 164 av_log(avctx, AV_LOG_ERROR, "iid_mode %d is reserved.\n", |
| 165 iid_mode); |
| 166 goto err; |
| 167 } |
| 168 ps->nr_iid_par = nr_iidicc_par_tab[iid_mode]; |
| 169 ps->iid_quant = iid_mode > 2; |
| 170 ps->nr_ipdopd_par = nr_iidopd_par_tab[iid_mode]; |
| 171 } |
| 172 ps->enable_icc = get_bits1(gb); |
| 173 if (ps->enable_icc) { |
| 174 ps->icc_mode = get_bits(gb, 3); |
| 175 if (ps->icc_mode > 5) { |
| 176 av_log(avctx, AV_LOG_ERROR, "icc_mode %d is reserved.\n", |
| 177 ps->icc_mode); |
| 178 goto err; |
| 179 } |
| 180 ps->nr_icc_par = nr_iidicc_par_tab[ps->icc_mode]; |
| 181 } |
| 182 ps->enable_ext = get_bits1(gb); |
| 183 } |
| 184 |
| 185 ps->frame_class = get_bits1(gb); |
| 186 ps->num_env_old = ps->num_env; |
| 187 ps->num_env = num_env_tab[ps->frame_class][get_bits(gb, 2)]; |
| 188 |
| 189 ps->border_position[0] = -1; |
| 190 if (ps->frame_class) { |
| 191 for (e = 1; e <= ps->num_env; e++) |
| 192 ps->border_position[e] = get_bits(gb, 5); |
| 193 } else |
| 194 for (e = 1; e <= ps->num_env; e++) |
| 195 ps->border_position[e] = (e * numQMFSlots >> ff_log2_tab[ps->num_env
]) - 1; |
| 196 |
| 197 if (ps->enable_iid) { |
| 198 for (e = 0; e < ps->num_env; e++) { |
| 199 int dt = get_bits1(gb); |
| 200 if (read_iid_data(avctx, gb, ps, ps->iid_par, huff_iid[2*dt+ps->iid_
quant], e, dt)) |
| 201 goto err; |
| 202 } |
| 203 } else |
| 204 memset(ps->iid_par, 0, sizeof(ps->iid_par)); |
| 205 |
| 206 if (ps->enable_icc) |
| 207 for (e = 0; e < ps->num_env; e++) { |
| 208 int dt = get_bits1(gb); |
| 209 if (read_icc_data(avctx, gb, ps, ps->icc_par, dt ? huff_icc_dt : huf
f_icc_df, e, dt)) |
| 210 goto err; |
| 211 } |
| 212 else |
| 213 memset(ps->icc_par, 0, sizeof(ps->icc_par)); |
| 214 |
| 215 if (ps->enable_ext) { |
| 216 int cnt = get_bits(gb, 4); |
| 217 if (cnt == 15) { |
| 218 cnt += get_bits(gb, 8); |
| 219 } |
| 220 cnt *= 8; |
| 221 while (cnt > 7) { |
| 222 int ps_extension_id = get_bits(gb, 2); |
| 223 cnt -= 2 + ps_read_extension_data(gb, ps, ps_extension_id); |
| 224 } |
| 225 if (cnt < 0) { |
| 226 av_log(avctx, AV_LOG_ERROR, "ps extension overflow %d", cnt); |
| 227 goto err; |
| 228 } |
| 229 skip_bits(gb, cnt); |
| 230 } |
| 231 |
| 232 ps->enable_ipdopd &= !PS_BASELINE; |
| 233 |
| 234 //Fix up envelopes |
| 235 if (!ps->num_env || ps->border_position[ps->num_env] < numQMFSlots - 1) { |
| 236 //Create a fake envelope |
| 237 int source = ps->num_env ? ps->num_env - 1 : ps->num_env_old - 1; |
| 238 if (source >= 0 && source != ps->num_env) { |
| 239 if (ps->enable_iid) { |
| 240 memcpy(ps->iid_par+ps->num_env, ps->iid_par+source, sizeof(ps->i
id_par[0])); |
| 241 } |
| 242 if (ps->enable_icc) { |
| 243 memcpy(ps->icc_par+ps->num_env, ps->icc_par+source, sizeof(ps->i
cc_par[0])); |
| 244 } |
| 245 if (ps->enable_ipdopd) { |
| 246 memcpy(ps->ipd_par+ps->num_env, ps->ipd_par+source, sizeof(ps->i
pd_par[0])); |
| 247 memcpy(ps->opd_par+ps->num_env, ps->opd_par+source, sizeof(ps->o
pd_par[0])); |
| 248 } |
| 249 } |
| 250 ps->num_env++; |
| 251 ps->border_position[ps->num_env] = numQMFSlots - 1; |
| 252 } |
| 253 |
| 254 |
| 255 ps->is34bands_old = ps->is34bands; |
| 256 if (!PS_BASELINE && (ps->enable_iid || ps->enable_icc)) |
| 257 ps->is34bands = (ps->enable_iid && ps->nr_iid_par == 34) || |
| 258 (ps->enable_icc && ps->nr_icc_par == 34); |
| 259 |
| 260 //Baseline |
| 261 if (!ps->enable_ipdopd) { |
| 262 memset(ps->ipd_par, 0, sizeof(ps->ipd_par)); |
| 263 memset(ps->opd_par, 0, sizeof(ps->opd_par)); |
| 264 } |
| 265 |
| 266 if (header) |
| 267 ps->start = 1; |
| 268 |
| 269 bits_consumed = get_bits_count(gb) - bit_count_start; |
| 270 if (bits_consumed <= bits_left) { |
| 271 skip_bits_long(gb_host, bits_consumed); |
| 272 return bits_consumed; |
| 273 } |
| 274 av_log(avctx, AV_LOG_ERROR, "Expected to read %d PS bits actually read %d.\n
", bits_left, bits_consumed); |
| 275 err: |
| 276 ps->start = 0; |
| 277 skip_bits_long(gb_host, bits_left); |
| 278 return bits_left; |
| 279 } |
| 280 |
| 281 /** Split one subband into 2 subsubbands with a symmetric real filter. |
| 282 * The filter must have its non-center even coefficients equal to zero. */ |
| 283 static void hybrid2_re(float (*in)[2], float (*out)[32][2], const float filter[7
], int len, int reverse) |
| 284 { |
| 285 int i, j; |
| 286 for (i = 0; i < len; i++, in++) { |
| 287 float re_in = filter[6] * in[6][0]; //real inphase |
| 288 float re_op = 0.0f; //real out of phase |
| 289 float im_in = filter[6] * in[6][1]; //imag inphase |
| 290 float im_op = 0.0f; //imag out of phase |
| 291 for (j = 0; j < 6; j += 2) { |
| 292 re_op += filter[j+1] * (in[j+1][0] + in[12-j-1][0]); |
| 293 im_op += filter[j+1] * (in[j+1][1] + in[12-j-1][1]); |
| 294 } |
| 295 out[ reverse][i][0] = re_in + re_op; |
| 296 out[ reverse][i][1] = im_in + im_op; |
| 297 out[!reverse][i][0] = re_in - re_op; |
| 298 out[!reverse][i][1] = im_in - im_op; |
| 299 } |
| 300 } |
| 301 |
| 302 /** Split one subband into 6 subsubbands with a complex filter */ |
| 303 static void hybrid6_cx(float (*in)[2], float (*out)[32][2], const float (*filter
)[7][2], int len) |
| 304 { |
| 305 int i, j, ssb; |
| 306 int N = 8; |
| 307 float temp[8][2]; |
| 308 |
| 309 for (i = 0; i < len; i++, in++) { |
| 310 for (ssb = 0; ssb < N; ssb++) { |
| 311 float sum_re = filter[ssb][6][0] * in[6][0], sum_im = filter[ssb][6]
[0] * in[6][1]; |
| 312 for (j = 0; j < 6; j++) { |
| 313 float in0_re = in[j][0]; |
| 314 float in0_im = in[j][1]; |
| 315 float in1_re = in[12-j][0]; |
| 316 float in1_im = in[12-j][1]; |
| 317 sum_re += filter[ssb][j][0] * (in0_re + in1_re) - filter[ssb][j]
[1] * (in0_im - in1_im); |
| 318 sum_im += filter[ssb][j][0] * (in0_im + in1_im) + filter[ssb][j]
[1] * (in0_re - in1_re); |
| 319 } |
| 320 temp[ssb][0] = sum_re; |
| 321 temp[ssb][1] = sum_im; |
| 322 } |
| 323 out[0][i][0] = temp[6][0]; |
| 324 out[0][i][1] = temp[6][1]; |
| 325 out[1][i][0] = temp[7][0]; |
| 326 out[1][i][1] = temp[7][1]; |
| 327 out[2][i][0] = temp[0][0]; |
| 328 out[2][i][1] = temp[0][1]; |
| 329 out[3][i][0] = temp[1][0]; |
| 330 out[3][i][1] = temp[1][1]; |
| 331 out[4][i][0] = temp[2][0] + temp[5][0]; |
| 332 out[4][i][1] = temp[2][1] + temp[5][1]; |
| 333 out[5][i][0] = temp[3][0] + temp[4][0]; |
| 334 out[5][i][1] = temp[3][1] + temp[4][1]; |
| 335 } |
| 336 } |
| 337 |
| 338 static void hybrid4_8_12_cx(float (*in)[2], float (*out)[32][2], const float (*f
ilter)[7][2], int N, int len) |
| 339 { |
| 340 int i, j, ssb; |
| 341 |
| 342 for (i = 0; i < len; i++, in++) { |
| 343 for (ssb = 0; ssb < N; ssb++) { |
| 344 float sum_re = filter[ssb][6][0] * in[6][0], sum_im = filter[ssb][6]
[0] * in[6][1]; |
| 345 for (j = 0; j < 6; j++) { |
| 346 float in0_re = in[j][0]; |
| 347 float in0_im = in[j][1]; |
| 348 float in1_re = in[12-j][0]; |
| 349 float in1_im = in[12-j][1]; |
| 350 sum_re += filter[ssb][j][0] * (in0_re + in1_re) - filter[ssb][j]
[1] * (in0_im - in1_im); |
| 351 sum_im += filter[ssb][j][0] * (in0_im + in1_im) + filter[ssb][j]
[1] * (in0_re - in1_re); |
| 352 } |
| 353 out[ssb][i][0] = sum_re; |
| 354 out[ssb][i][1] = sum_im; |
| 355 } |
| 356 } |
| 357 } |
| 358 |
| 359 static void hybrid_analysis(float out[91][32][2], float in[5][44][2], float L[2]
[38][64], int is34, int len) |
| 360 { |
| 361 int i, j; |
| 362 for (i = 0; i < 5; i++) { |
| 363 for (j = 0; j < 38; j++) { |
| 364 in[i][j+6][0] = L[0][j][i]; |
| 365 in[i][j+6][1] = L[1][j][i]; |
| 366 } |
| 367 } |
| 368 if(is34) { |
| 369 hybrid4_8_12_cx(in[0], out, f34_0_12, 12, len); |
| 370 hybrid4_8_12_cx(in[1], out+12, f34_1_8, 8, len); |
| 371 hybrid4_8_12_cx(in[2], out+20, f34_2_4, 4, len); |
| 372 hybrid4_8_12_cx(in[3], out+24, f34_2_4, 4, len); |
| 373 hybrid4_8_12_cx(in[4], out+28, f34_2_4, 4, len); |
| 374 for (i = 0; i < 59; i++) { |
| 375 for (j = 0; j < len; j++) { |
| 376 out[i+32][j][0] = L[0][j][i+5]; |
| 377 out[i+32][j][1] = L[1][j][i+5]; |
| 378 } |
| 379 } |
| 380 } else { |
| 381 hybrid6_cx(in[0], out, f20_0_8, len); |
| 382 hybrid2_re(in[1], out+6, g1_Q2, len, 1); |
| 383 hybrid2_re(in[2], out+8, g1_Q2, len, 0); |
| 384 for (i = 0; i < 61; i++) { |
| 385 for (j = 0; j < len; j++) { |
| 386 out[i+10][j][0] = L[0][j][i+3]; |
| 387 out[i+10][j][1] = L[1][j][i+3]; |
| 388 } |
| 389 } |
| 390 } |
| 391 //update in_buf |
| 392 for (i = 0; i < 5; i++) { |
| 393 memcpy(in[i], in[i]+32, 6 * sizeof(in[i][0])); |
| 394 } |
| 395 } |
| 396 |
| 397 static void hybrid_synthesis(float out[2][38][64], float in[91][32][2], int is34
, int len) |
| 398 { |
| 399 int i, n; |
| 400 if(is34) { |
| 401 for (n = 0; n < len; n++) { |
| 402 memset(out[0][n], 0, 5*sizeof(out[0][n][0])); |
| 403 memset(out[1][n], 0, 5*sizeof(out[1][n][0])); |
| 404 for(i = 0; i < 12; i++) { |
| 405 out[0][n][0] += in[ i][n][0]; |
| 406 out[1][n][0] += in[ i][n][1]; |
| 407 } |
| 408 for(i = 0; i < 8; i++) { |
| 409 out[0][n][1] += in[12+i][n][0]; |
| 410 out[1][n][1] += in[12+i][n][1]; |
| 411 } |
| 412 for(i = 0; i < 4; i++) { |
| 413 out[0][n][2] += in[20+i][n][0]; |
| 414 out[1][n][2] += in[20+i][n][1]; |
| 415 out[0][n][3] += in[24+i][n][0]; |
| 416 out[1][n][3] += in[24+i][n][1]; |
| 417 out[0][n][4] += in[28+i][n][0]; |
| 418 out[1][n][4] += in[28+i][n][1]; |
| 419 } |
| 420 } |
| 421 for (i = 0; i < 59; i++) { |
| 422 for (n = 0; n < len; n++) { |
| 423 out[0][n][i+5] = in[i+32][n][0]; |
| 424 out[1][n][i+5] = in[i+32][n][1]; |
| 425 } |
| 426 } |
| 427 } else { |
| 428 for (n = 0; n < len; n++) { |
| 429 out[0][n][0] = in[0][n][0] + in[1][n][0] + in[2][n][0] + |
| 430 in[3][n][0] + in[4][n][0] + in[5][n][0]; |
| 431 out[1][n][0] = in[0][n][1] + in[1][n][1] + in[2][n][1] + |
| 432 in[3][n][1] + in[4][n][1] + in[5][n][1]; |
| 433 out[0][n][1] = in[6][n][0] + in[7][n][0]; |
| 434 out[1][n][1] = in[6][n][1] + in[7][n][1]; |
| 435 out[0][n][2] = in[8][n][0] + in[9][n][0]; |
| 436 out[1][n][2] = in[8][n][1] + in[9][n][1]; |
| 437 } |
| 438 for (i = 0; i < 61; i++) { |
| 439 for (n = 0; n < len; n++) { |
| 440 out[0][n][i+3] = in[i+10][n][0]; |
| 441 out[1][n][i+3] = in[i+10][n][1]; |
| 442 } |
| 443 } |
| 444 } |
| 445 } |
| 446 |
| 447 /// All-pass filter decay slope |
| 448 #define DECAY_SLOPE 0.05f |
| 449 /// Number of frequency bands that can be addressed by the parameter index, b(k) |
| 450 static const int NR_PAR_BANDS[] = { 20, 34 }; |
| 451 /// Number of frequency bands that can be addressed by the sub subband index, k |
| 452 static const int NR_BANDS[] = { 71, 91 }; |
| 453 /// Start frequency band for the all-pass filter decay slope |
| 454 static const int DECAY_CUTOFF[] = { 10, 32 }; |
| 455 /// Number of all-pass filer bands |
| 456 static const int NR_ALLPASS_BANDS[] = { 30, 50 }; |
| 457 /// First stereo band using the short one sample delay |
| 458 static const int SHORT_DELAY_BAND[] = { 42, 62 }; |
| 459 |
| 460 /** Table 8.46 */ |
| 461 static void map_idx_10_to_20(int8_t *par_mapped, const int8_t *par, int full) |
| 462 { |
| 463 int b; |
| 464 if (full) |
| 465 b = 9; |
| 466 else { |
| 467 b = 4; |
| 468 par_mapped[10] = 0; |
| 469 } |
| 470 for (; b >= 0; b--) { |
| 471 par_mapped[2*b+1] = par_mapped[2*b] = par[b]; |
| 472 } |
| 473 } |
| 474 |
| 475 static void map_idx_34_to_20(int8_t *par_mapped, const int8_t *par, int full) |
| 476 { |
| 477 par_mapped[ 0] = (2*par[ 0] + par[ 1]) / 3; |
| 478 par_mapped[ 1] = ( par[ 1] + 2*par[ 2]) / 3; |
| 479 par_mapped[ 2] = (2*par[ 3] + par[ 4]) / 3; |
| 480 par_mapped[ 3] = ( par[ 4] + 2*par[ 5]) / 3; |
| 481 par_mapped[ 4] = ( par[ 6] + par[ 7]) / 2; |
| 482 par_mapped[ 5] = ( par[ 8] + par[ 9]) / 2; |
| 483 par_mapped[ 6] = par[10]; |
| 484 par_mapped[ 7] = par[11]; |
| 485 par_mapped[ 8] = ( par[12] + par[13]) / 2; |
| 486 par_mapped[ 9] = ( par[14] + par[15]) / 2; |
| 487 par_mapped[10] = par[16]; |
| 488 if (full) { |
| 489 par_mapped[11] = par[17]; |
| 490 par_mapped[12] = par[18]; |
| 491 par_mapped[13] = par[19]; |
| 492 par_mapped[14] = ( par[20] + par[21]) / 2; |
| 493 par_mapped[15] = ( par[22] + par[23]) / 2; |
| 494 par_mapped[16] = ( par[24] + par[25]) / 2; |
| 495 par_mapped[17] = ( par[26] + par[27]) / 2; |
| 496 par_mapped[18] = ( par[28] + par[29] + par[30] + par[31]) / 4; |
| 497 par_mapped[19] = ( par[32] + par[33]) / 2; |
| 498 } |
| 499 } |
| 500 |
| 501 static void map_val_34_to_20(float par[PS_MAX_NR_IIDICC]) |
| 502 { |
| 503 par[ 0] = (2*par[ 0] + par[ 1]) * 0.33333333f; |
| 504 par[ 1] = ( par[ 1] + 2*par[ 2]) * 0.33333333f; |
| 505 par[ 2] = (2*par[ 3] + par[ 4]) * 0.33333333f; |
| 506 par[ 3] = ( par[ 4] + 2*par[ 5]) * 0.33333333f; |
| 507 par[ 4] = ( par[ 6] + par[ 7]) * 0.5f; |
| 508 par[ 5] = ( par[ 8] + par[ 9]) * 0.5f; |
| 509 par[ 6] = par[10]; |
| 510 par[ 7] = par[11]; |
| 511 par[ 8] = ( par[12] + par[13]) * 0.5f; |
| 512 par[ 9] = ( par[14] + par[15]) * 0.5f; |
| 513 par[10] = par[16]; |
| 514 par[11] = par[17]; |
| 515 par[12] = par[18]; |
| 516 par[13] = par[19]; |
| 517 par[14] = ( par[20] + par[21]) * 0.5f; |
| 518 par[15] = ( par[22] + par[23]) * 0.5f; |
| 519 par[16] = ( par[24] + par[25]) * 0.5f; |
| 520 par[17] = ( par[26] + par[27]) * 0.5f; |
| 521 par[18] = ( par[28] + par[29] + par[30] + par[31]) * 0.25f; |
| 522 par[19] = ( par[32] + par[33]) * 0.5f; |
| 523 } |
| 524 |
| 525 static void map_idx_10_to_34(int8_t *par_mapped, const int8_t *par, int full) |
| 526 { |
| 527 if (full) { |
| 528 par_mapped[33] = par[9]; |
| 529 par_mapped[32] = par[9]; |
| 530 par_mapped[31] = par[9]; |
| 531 par_mapped[30] = par[9]; |
| 532 par_mapped[29] = par[9]; |
| 533 par_mapped[28] = par[9]; |
| 534 par_mapped[27] = par[8]; |
| 535 par_mapped[26] = par[8]; |
| 536 par_mapped[25] = par[8]; |
| 537 par_mapped[24] = par[8]; |
| 538 par_mapped[23] = par[7]; |
| 539 par_mapped[22] = par[7]; |
| 540 par_mapped[21] = par[7]; |
| 541 par_mapped[20] = par[7]; |
| 542 par_mapped[19] = par[6]; |
| 543 par_mapped[18] = par[6]; |
| 544 par_mapped[17] = par[5]; |
| 545 par_mapped[16] = par[5]; |
| 546 } else { |
| 547 par_mapped[16] = 0; |
| 548 } |
| 549 par_mapped[15] = par[4]; |
| 550 par_mapped[14] = par[4]; |
| 551 par_mapped[13] = par[4]; |
| 552 par_mapped[12] = par[4]; |
| 553 par_mapped[11] = par[3]; |
| 554 par_mapped[10] = par[3]; |
| 555 par_mapped[ 9] = par[2]; |
| 556 par_mapped[ 8] = par[2]; |
| 557 par_mapped[ 7] = par[2]; |
| 558 par_mapped[ 6] = par[2]; |
| 559 par_mapped[ 5] = par[1]; |
| 560 par_mapped[ 4] = par[1]; |
| 561 par_mapped[ 3] = par[1]; |
| 562 par_mapped[ 2] = par[0]; |
| 563 par_mapped[ 1] = par[0]; |
| 564 par_mapped[ 0] = par[0]; |
| 565 } |
| 566 |
| 567 static void map_idx_20_to_34(int8_t *par_mapped, const int8_t *par, int full) |
| 568 { |
| 569 if (full) { |
| 570 par_mapped[33] = par[19]; |
| 571 par_mapped[32] = par[19]; |
| 572 par_mapped[31] = par[18]; |
| 573 par_mapped[30] = par[18]; |
| 574 par_mapped[29] = par[18]; |
| 575 par_mapped[28] = par[18]; |
| 576 par_mapped[27] = par[17]; |
| 577 par_mapped[26] = par[17]; |
| 578 par_mapped[25] = par[16]; |
| 579 par_mapped[24] = par[16]; |
| 580 par_mapped[23] = par[15]; |
| 581 par_mapped[22] = par[15]; |
| 582 par_mapped[21] = par[14]; |
| 583 par_mapped[20] = par[14]; |
| 584 par_mapped[19] = par[13]; |
| 585 par_mapped[18] = par[12]; |
| 586 par_mapped[17] = par[11]; |
| 587 } |
| 588 par_mapped[16] = par[10]; |
| 589 par_mapped[15] = par[ 9]; |
| 590 par_mapped[14] = par[ 9]; |
| 591 par_mapped[13] = par[ 8]; |
| 592 par_mapped[12] = par[ 8]; |
| 593 par_mapped[11] = par[ 7]; |
| 594 par_mapped[10] = par[ 6]; |
| 595 par_mapped[ 9] = par[ 5]; |
| 596 par_mapped[ 8] = par[ 5]; |
| 597 par_mapped[ 7] = par[ 4]; |
| 598 par_mapped[ 6] = par[ 4]; |
| 599 par_mapped[ 5] = par[ 3]; |
| 600 par_mapped[ 4] = (par[ 2] + par[ 3]) / 2; |
| 601 par_mapped[ 3] = par[ 2]; |
| 602 par_mapped[ 2] = par[ 1]; |
| 603 par_mapped[ 1] = (par[ 0] + par[ 1]) / 2; |
| 604 par_mapped[ 0] = par[ 0]; |
| 605 } |
| 606 |
| 607 static void map_val_20_to_34(float par[PS_MAX_NR_IIDICC]) |
| 608 { |
| 609 par[33] = par[19]; |
| 610 par[32] = par[19]; |
| 611 par[31] = par[18]; |
| 612 par[30] = par[18]; |
| 613 par[29] = par[18]; |
| 614 par[28] = par[18]; |
| 615 par[27] = par[17]; |
| 616 par[26] = par[17]; |
| 617 par[25] = par[16]; |
| 618 par[24] = par[16]; |
| 619 par[23] = par[15]; |
| 620 par[22] = par[15]; |
| 621 par[21] = par[14]; |
| 622 par[20] = par[14]; |
| 623 par[19] = par[13]; |
| 624 par[18] = par[12]; |
| 625 par[17] = par[11]; |
| 626 par[16] = par[10]; |
| 627 par[15] = par[ 9]; |
| 628 par[14] = par[ 9]; |
| 629 par[13] = par[ 8]; |
| 630 par[12] = par[ 8]; |
| 631 par[11] = par[ 7]; |
| 632 par[10] = par[ 6]; |
| 633 par[ 9] = par[ 5]; |
| 634 par[ 8] = par[ 5]; |
| 635 par[ 7] = par[ 4]; |
| 636 par[ 6] = par[ 4]; |
| 637 par[ 5] = par[ 3]; |
| 638 par[ 4] = (par[ 2] + par[ 3]) * 0.5f; |
| 639 par[ 3] = par[ 2]; |
| 640 par[ 2] = par[ 1]; |
| 641 par[ 1] = (par[ 0] + par[ 1]) * 0.5f; |
| 642 par[ 0] = par[ 0]; |
| 643 } |
| 644 |
| 645 static void decorrelation(PSContext *ps, float (*out)[32][2], const float (*s)[3
2][2], int is34) |
| 646 { |
| 647 float power[34][PS_QMF_TIME_SLOTS] = {{0}}; |
| 648 float transient_gain[34][PS_QMF_TIME_SLOTS]; |
| 649 float *peak_decay_nrg = ps->peak_decay_nrg; |
| 650 float *power_smooth = ps->power_smooth; |
| 651 float *peak_decay_diff_smooth = ps->peak_decay_diff_smooth; |
| 652 float (*delay)[PS_QMF_TIME_SLOTS + PS_MAX_DELAY][2] = ps->delay; |
| 653 float (*ap_delay)[PS_AP_LINKS][PS_QMF_TIME_SLOTS + PS_MAX_AP_DELAY][2] = ps-
>ap_delay; |
| 654 const int8_t *k_to_i = is34 ? k_to_i_34 : k_to_i_20; |
| 655 const float peak_decay_factor = 0.76592833836465f; |
| 656 const float transient_impact = 1.5f; |
| 657 const float a_smooth = 0.25f; //< Smoothing coefficient |
| 658 int i, k, m, n; |
| 659 int n0 = 0, nL = 32; |
| 660 static const int link_delay[] = { 3, 4, 5 }; |
| 661 static const float a[] = { 0.65143905753106f, |
| 662 0.56471812200776f, |
| 663 0.48954165955695f }; |
| 664 |
| 665 if (is34 != ps->is34bands_old) { |
| 666 memset(ps->peak_decay_nrg, 0, sizeof(ps->peak_decay_nrg)); |
| 667 memset(ps->power_smooth, 0, sizeof(ps->power_smooth)); |
| 668 memset(ps->peak_decay_diff_smooth, 0, sizeof(ps->peak_decay_diff_smooth)
); |
| 669 memset(ps->delay, 0, sizeof(ps->delay)); |
| 670 memset(ps->ap_delay, 0, sizeof(ps->ap_delay)); |
| 671 } |
| 672 |
| 673 for (n = n0; n < nL; n++) { |
| 674 for (k = 0; k < NR_BANDS[is34]; k++) { |
| 675 int i = k_to_i[k]; |
| 676 power[i][n] += s[k][n][0] * s[k][n][0] + s[k][n][1] * s[k][n][1]; |
| 677 } |
| 678 } |
| 679 |
| 680 //Transient detection |
| 681 for (i = 0; i < NR_PAR_BANDS[is34]; i++) { |
| 682 for (n = n0; n < nL; n++) { |
| 683 float decayed_peak = peak_decay_factor * peak_decay_nrg[i]; |
| 684 float denom; |
| 685 peak_decay_nrg[i] = FFMAX(decayed_peak, power[i][n]); |
| 686 power_smooth[i] += a_smooth * (power[i][n] - power_smooth[i]); |
| 687 peak_decay_diff_smooth[i] += a_smooth * (peak_decay_nrg[i] - power[i
][n] - peak_decay_diff_smooth[i]); |
| 688 denom = transient_impact * peak_decay_diff_smooth[i]; |
| 689 transient_gain[i][n] = (denom > power_smooth[i]) ? |
| 690 power_smooth[i] / denom : 1.0f; |
| 691 } |
| 692 } |
| 693 |
| 694 //Decorrelation and transient reduction |
| 695 // PS_AP_LINKS - 1 |
| 696 // ----- |
| 697 // | | Q_fract_allpass[k][m]*z^-link_delay[m
] - a[m]*g_decay_slope[k] |
| 698 //H[k][z] = z^-2 * phi_fract[k] * | | --------------------------------------
-------------------------- |
| 699 // | | 1 - a[m]*g_decay_slope[k]*Q_fract_allp
ass[k][m]*z^-link_delay[m] |
| 700 // m = 0 |
| 701 //d[k][z] (out) = transient_gain_mapped[k][z] * H[k][z] * s[k][z] |
| 702 for (k = 0; k < NR_ALLPASS_BANDS[is34]; k++) { |
| 703 int b = k_to_i[k]; |
| 704 float g_decay_slope = 1.f - DECAY_SLOPE * (k - DECAY_CUTOFF[is34]); |
| 705 float ag[PS_AP_LINKS]; |
| 706 g_decay_slope = av_clipf(g_decay_slope, 0.f, 1.f); |
| 707 memcpy(delay[k], delay[k]+nL, PS_MAX_DELAY*sizeof(delay[k][0])); |
| 708 memcpy(delay[k]+PS_MAX_DELAY, s[k], numQMFSlots*sizeof(delay[k][0])); |
| 709 for (m = 0; m < PS_AP_LINKS; m++) { |
| 710 memcpy(ap_delay[k][m], ap_delay[k][m]+numQMFSlots, 5*siz
eof(ap_delay[k][m][0])); |
| 711 ag[m] = a[m] * g_decay_slope; |
| 712 } |
| 713 for (n = n0; n < nL; n++) { |
| 714 float in_re = delay[k][n+PS_MAX_DELAY-2][0] * phi_fract[is34][k][0]
- |
| 715 delay[k][n+PS_MAX_DELAY-2][1] * phi_fract[is34][k][1]; |
| 716 float in_im = delay[k][n+PS_MAX_DELAY-2][0] * phi_fract[is34][k][1]
+ |
| 717 delay[k][n+PS_MAX_DELAY-2][1] * phi_fract[is34][k][0]; |
| 718 for (m = 0; m < PS_AP_LINKS; m++) { |
| 719 float a_re = ag[m] * in_re; |
| 720 float a_im = ag[m] * in_im; |
| 721 float link_delay_re = ap_delay[k][m][n+5-link_delay[m]][0]
; |
| 722 float link_delay_im = ap_delay[k][m][n+5-link_delay[m]][1]
; |
| 723 float fractional_delay_re = Q_fract_allpass[is34][k][m][0]; |
| 724 float fractional_delay_im = Q_fract_allpass[is34][k][m][1]; |
| 725 ap_delay[k][m][n+5][0] = in_re; |
| 726 ap_delay[k][m][n+5][1] = in_im; |
| 727 in_re = link_delay_re * fractional_delay_re - link_delay_im * fr
actional_delay_im - a_re; |
| 728 in_im = link_delay_re * fractional_delay_im + link_delay_im * fr
actional_delay_re - a_im; |
| 729 ap_delay[k][m][n+5][0] += ag[m] * in_re; |
| 730 ap_delay[k][m][n+5][1] += ag[m] * in_im; |
| 731 } |
| 732 out[k][n][0] = transient_gain[b][n] * in_re; |
| 733 out[k][n][1] = transient_gain[b][n] * in_im; |
| 734 } |
| 735 } |
| 736 for (; k < SHORT_DELAY_BAND[is34]; k++) { |
| 737 memcpy(delay[k], delay[k]+nL, PS_MAX_DELAY*sizeof(delay[k][0])); |
| 738 memcpy(delay[k]+PS_MAX_DELAY, s[k], numQMFSlots*sizeof(delay[k][0])); |
| 739 for (n = n0; n < nL; n++) { |
| 740 //H = delay 14 |
| 741 out[k][n][0] = transient_gain[k_to_i[k]][n] * delay[k][n+PS_MAX_DELA
Y-14][0]; |
| 742 out[k][n][1] = transient_gain[k_to_i[k]][n] * delay[k][n+PS_MAX_DELA
Y-14][1]; |
| 743 } |
| 744 } |
| 745 for (; k < NR_BANDS[is34]; k++) { |
| 746 memcpy(delay[k], delay[k]+nL, PS_MAX_DELAY*sizeof(delay[k][0])); |
| 747 memcpy(delay[k]+PS_MAX_DELAY, s[k], numQMFSlots*sizeof(delay[k][0])); |
| 748 for (n = n0; n < nL; n++) { |
| 749 //H = delay 1 |
| 750 out[k][n][0] = transient_gain[k_to_i[k]][n] * delay[k][n+PS_MAX_DELA
Y-1][0]; |
| 751 out[k][n][1] = transient_gain[k_to_i[k]][n] * delay[k][n+PS_MAX_DELA
Y-1][1]; |
| 752 } |
| 753 } |
| 754 } |
| 755 |
| 756 static void remap34(int8_t (**p_par_mapped)[PS_MAX_NR_IIDICC], |
| 757 int8_t (*par)[PS_MAX_NR_IIDICC], |
| 758 int num_par, int num_env, int full) |
| 759 { |
| 760 int8_t (*par_mapped)[PS_MAX_NR_IIDICC] = *p_par_mapped; |
| 761 int e; |
| 762 if (num_par == 20 || num_par == 11) { |
| 763 for (e = 0; e < num_env; e++) { |
| 764 map_idx_20_to_34(par_mapped[e], par[e], full); |
| 765 } |
| 766 } else if (num_par == 10 || num_par == 5) { |
| 767 for (e = 0; e < num_env; e++) { |
| 768 map_idx_10_to_34(par_mapped[e], par[e], full); |
| 769 } |
| 770 } else { |
| 771 *p_par_mapped = par; |
| 772 } |
| 773 } |
| 774 |
| 775 static void remap20(int8_t (**p_par_mapped)[PS_MAX_NR_IIDICC], |
| 776 int8_t (*par)[PS_MAX_NR_IIDICC], |
| 777 int num_par, int num_env, int full) |
| 778 { |
| 779 int8_t (*par_mapped)[PS_MAX_NR_IIDICC] = *p_par_mapped; |
| 780 int e; |
| 781 if (num_par == 34 || num_par == 17) { |
| 782 for (e = 0; e < num_env; e++) { |
| 783 map_idx_34_to_20(par_mapped[e], par[e], full); |
| 784 } |
| 785 } else if (num_par == 10 || num_par == 5) { |
| 786 for (e = 0; e < num_env; e++) { |
| 787 map_idx_10_to_20(par_mapped[e], par[e], full); |
| 788 } |
| 789 } else { |
| 790 *p_par_mapped = par; |
| 791 } |
| 792 } |
| 793 |
| 794 static void stereo_processing(PSContext *ps, float (*l)[32][2], float (*r)[32][2
], int is34) |
| 795 { |
| 796 int e, b, k, n; |
| 797 |
| 798 float (*H11)[PS_MAX_NUM_ENV+1][PS_MAX_NR_IIDICC] = ps->H11; |
| 799 float (*H12)[PS_MAX_NUM_ENV+1][PS_MAX_NR_IIDICC] = ps->H12; |
| 800 float (*H21)[PS_MAX_NUM_ENV+1][PS_MAX_NR_IIDICC] = ps->H21; |
| 801 float (*H22)[PS_MAX_NUM_ENV+1][PS_MAX_NR_IIDICC] = ps->H22; |
| 802 int8_t *opd_hist = ps->opd_hist; |
| 803 int8_t *ipd_hist = ps->ipd_hist; |
| 804 int8_t iid_mapped_buf[PS_MAX_NUM_ENV][PS_MAX_NR_IIDICC]; |
| 805 int8_t icc_mapped_buf[PS_MAX_NUM_ENV][PS_MAX_NR_IIDICC]; |
| 806 int8_t ipd_mapped_buf[PS_MAX_NUM_ENV][PS_MAX_NR_IIDICC]; |
| 807 int8_t opd_mapped_buf[PS_MAX_NUM_ENV][PS_MAX_NR_IIDICC]; |
| 808 int8_t (*iid_mapped)[PS_MAX_NR_IIDICC] = iid_mapped_buf; |
| 809 int8_t (*icc_mapped)[PS_MAX_NR_IIDICC] = icc_mapped_buf; |
| 810 int8_t (*ipd_mapped)[PS_MAX_NR_IIDICC] = ipd_mapped_buf; |
| 811 int8_t (*opd_mapped)[PS_MAX_NR_IIDICC] = opd_mapped_buf; |
| 812 const int8_t *k_to_i = is34 ? k_to_i_34 : k_to_i_20; |
| 813 const float (*H_LUT)[8][4] = (PS_BASELINE || ps->icc_mode < 3) ? HA : HB; |
| 814 |
| 815 //Remapping |
| 816 memcpy(H11[0][0], H11[0][ps->num_env_old], PS_MAX_NR_IIDICC*sizeof(H11[0][0]
[0])); |
| 817 memcpy(H11[1][0], H11[1][ps->num_env_old], PS_MAX_NR_IIDICC*sizeof(H11[1][0]
[0])); |
| 818 memcpy(H12[0][0], H12[0][ps->num_env_old], PS_MAX_NR_IIDICC*sizeof(H12[0][0]
[0])); |
| 819 memcpy(H12[1][0], H12[1][ps->num_env_old], PS_MAX_NR_IIDICC*sizeof(H12[1][0]
[0])); |
| 820 memcpy(H21[0][0], H21[0][ps->num_env_old], PS_MAX_NR_IIDICC*sizeof(H21[0][0]
[0])); |
| 821 memcpy(H21[1][0], H21[1][ps->num_env_old], PS_MAX_NR_IIDICC*sizeof(H21[1][0]
[0])); |
| 822 memcpy(H22[0][0], H22[0][ps->num_env_old], PS_MAX_NR_IIDICC*sizeof(H22[0][0]
[0])); |
| 823 memcpy(H22[1][0], H22[1][ps->num_env_old], PS_MAX_NR_IIDICC*sizeof(H22[1][0]
[0])); |
| 824 if (is34) { |
| 825 remap34(&iid_mapped, ps->iid_par, ps->nr_iid_par, ps->num_env, 1); |
| 826 remap34(&icc_mapped, ps->icc_par, ps->nr_icc_par, ps->num_env, 1); |
| 827 if (ps->enable_ipdopd) { |
| 828 remap34(&ipd_mapped, ps->ipd_par, ps->nr_ipdopd_par, ps->num_env, 0)
; |
| 829 remap34(&opd_mapped, ps->opd_par, ps->nr_ipdopd_par, ps->num_env, 0)
; |
| 830 } |
| 831 if (!ps->is34bands_old) { |
| 832 map_val_20_to_34(H11[0][0]); |
| 833 map_val_20_to_34(H11[1][0]); |
| 834 map_val_20_to_34(H12[0][0]); |
| 835 map_val_20_to_34(H12[1][0]); |
| 836 map_val_20_to_34(H21[0][0]); |
| 837 map_val_20_to_34(H21[1][0]); |
| 838 map_val_20_to_34(H22[0][0]); |
| 839 map_val_20_to_34(H22[1][0]); |
| 840 ipdopd_reset(ipd_hist, opd_hist); |
| 841 } |
| 842 } else { |
| 843 remap20(&iid_mapped, ps->iid_par, ps->nr_iid_par, ps->num_env, 1); |
| 844 remap20(&icc_mapped, ps->icc_par, ps->nr_icc_par, ps->num_env, 1); |
| 845 if (ps->enable_ipdopd) { |
| 846 remap20(&ipd_mapped, ps->ipd_par, ps->nr_ipdopd_par, ps->num_env, 0)
; |
| 847 remap20(&opd_mapped, ps->opd_par, ps->nr_ipdopd_par, ps->num_env, 0)
; |
| 848 } |
| 849 if (ps->is34bands_old) { |
| 850 map_val_34_to_20(H11[0][0]); |
| 851 map_val_34_to_20(H11[1][0]); |
| 852 map_val_34_to_20(H12[0][0]); |
| 853 map_val_34_to_20(H12[1][0]); |
| 854 map_val_34_to_20(H21[0][0]); |
| 855 map_val_34_to_20(H21[1][0]); |
| 856 map_val_34_to_20(H22[0][0]); |
| 857 map_val_34_to_20(H22[1][0]); |
| 858 ipdopd_reset(ipd_hist, opd_hist); |
| 859 } |
| 860 } |
| 861 |
| 862 //Mixing |
| 863 for (e = 0; e < ps->num_env; e++) { |
| 864 for (b = 0; b < NR_PAR_BANDS[is34]; b++) { |
| 865 float h11, h12, h21, h22; |
| 866 h11 = H_LUT[iid_mapped[e][b] + 7 + 23 * ps->iid_quant][icc_mapped[e]
[b]][0]; |
| 867 h12 = H_LUT[iid_mapped[e][b] + 7 + 23 * ps->iid_quant][icc_mapped[e]
[b]][1]; |
| 868 h21 = H_LUT[iid_mapped[e][b] + 7 + 23 * ps->iid_quant][icc_mapped[e]
[b]][2]; |
| 869 h22 = H_LUT[iid_mapped[e][b] + 7 + 23 * ps->iid_quant][icc_mapped[e]
[b]][3]; |
| 870 if (!PS_BASELINE && ps->enable_ipdopd && b < ps->nr_ipdopd_par) { |
| 871 //The spec say says to only run this smoother when enable_ipdopd |
| 872 //is set but the reference decoder appears to run it constantly |
| 873 float h11i, h12i, h21i, h22i; |
| 874 float ipd_adj_re, ipd_adj_im; |
| 875 int opd_idx = opd_hist[b] * 8 + opd_mapped[e][b]; |
| 876 int ipd_idx = ipd_hist[b] * 8 + ipd_mapped[e][b]; |
| 877 float opd_re = pd_re_smooth[opd_idx]; |
| 878 float opd_im = pd_im_smooth[opd_idx]; |
| 879 float ipd_re = pd_re_smooth[ipd_idx]; |
| 880 float ipd_im = pd_im_smooth[ipd_idx]; |
| 881 opd_hist[b] = opd_idx & 0x3F; |
| 882 ipd_hist[b] = ipd_idx & 0x3F; |
| 883 |
| 884 ipd_adj_re = opd_re*ipd_re + opd_im*ipd_im; |
| 885 ipd_adj_im = opd_im*ipd_re - opd_re*ipd_im; |
| 886 h11i = h11 * opd_im; |
| 887 h11 = h11 * opd_re; |
| 888 h12i = h12 * ipd_adj_im; |
| 889 h12 = h12 * ipd_adj_re; |
| 890 h21i = h21 * opd_im; |
| 891 h21 = h21 * opd_re; |
| 892 h22i = h22 * ipd_adj_im; |
| 893 h22 = h22 * ipd_adj_re; |
| 894 H11[1][e+1][b] = h11i; |
| 895 H12[1][e+1][b] = h12i; |
| 896 H21[1][e+1][b] = h21i; |
| 897 H22[1][e+1][b] = h22i; |
| 898 } |
| 899 H11[0][e+1][b] = h11; |
| 900 H12[0][e+1][b] = h12; |
| 901 H21[0][e+1][b] = h21; |
| 902 H22[0][e+1][b] = h22; |
| 903 } |
| 904 for (k = 0; k < NR_BANDS[is34]; k++) { |
| 905 float h11r, h12r, h21r, h22r; |
| 906 float h11i, h12i, h21i, h22i; |
| 907 float h11r_step, h12r_step, h21r_step, h22r_step; |
| 908 float h11i_step, h12i_step, h21i_step, h22i_step; |
| 909 int start = ps->border_position[e]; |
| 910 int stop = ps->border_position[e+1]; |
| 911 float width = 1.f / (stop - start); |
| 912 b = k_to_i[k]; |
| 913 h11r = H11[0][e][b]; |
| 914 h12r = H12[0][e][b]; |
| 915 h21r = H21[0][e][b]; |
| 916 h22r = H22[0][e][b]; |
| 917 if (!PS_BASELINE && ps->enable_ipdopd) { |
| 918 //Is this necessary? ps_04_new seems unchanged |
| 919 if ((is34 && k <= 13 && k >= 9) || (!is34 && k <= 1)) { |
| 920 h11i = -H11[1][e][b]; |
| 921 h12i = -H12[1][e][b]; |
| 922 h21i = -H21[1][e][b]; |
| 923 h22i = -H22[1][e][b]; |
| 924 } else { |
| 925 h11i = H11[1][e][b]; |
| 926 h12i = H12[1][e][b]; |
| 927 h21i = H21[1][e][b]; |
| 928 h22i = H22[1][e][b]; |
| 929 } |
| 930 } |
| 931 //Interpolation |
| 932 h11r_step = (H11[0][e+1][b] - h11r) * width; |
| 933 h12r_step = (H12[0][e+1][b] - h12r) * width; |
| 934 h21r_step = (H21[0][e+1][b] - h21r) * width; |
| 935 h22r_step = (H22[0][e+1][b] - h22r) * width; |
| 936 if (!PS_BASELINE && ps->enable_ipdopd) { |
| 937 h11i_step = (H11[1][e+1][b] - h11i) * width; |
| 938 h12i_step = (H12[1][e+1][b] - h12i) * width; |
| 939 h21i_step = (H21[1][e+1][b] - h21i) * width; |
| 940 h22i_step = (H22[1][e+1][b] - h22i) * width; |
| 941 } |
| 942 for (n = start + 1; n <= stop; n++) { |
| 943 //l is s, r is d |
| 944 float l_re = l[k][n][0]; |
| 945 float l_im = l[k][n][1]; |
| 946 float r_re = r[k][n][0]; |
| 947 float r_im = r[k][n][1]; |
| 948 h11r += h11r_step; |
| 949 h12r += h12r_step; |
| 950 h21r += h21r_step; |
| 951 h22r += h22r_step; |
| 952 if (!PS_BASELINE && ps->enable_ipdopd) { |
| 953 h11i += h11i_step; |
| 954 h12i += h12i_step; |
| 955 h21i += h21i_step; |
| 956 h22i += h22i_step; |
| 957 |
| 958 l[k][n][0] = h11r*l_re + h21r*r_re - h11i*l_im - h21i*r_im; |
| 959 l[k][n][1] = h11r*l_im + h21r*r_im + h11i*l_re + h21i*r_re; |
| 960 r[k][n][0] = h12r*l_re + h22r*r_re - h12i*l_im - h22i*r_im; |
| 961 r[k][n][1] = h12r*l_im + h22r*r_im + h12i*l_re + h22i*r_re; |
| 962 } else { |
| 963 l[k][n][0] = h11r*l_re + h21r*r_re; |
| 964 l[k][n][1] = h11r*l_im + h21r*r_im; |
| 965 r[k][n][0] = h12r*l_re + h22r*r_re; |
| 966 r[k][n][1] = h12r*l_im + h22r*r_im; |
| 967 } |
| 968 } |
| 969 } |
| 970 } |
| 971 } |
| 972 |
| 973 int ff_ps_apply(AVCodecContext *avctx, PSContext *ps, float L[2][38][64], float
R[2][38][64], int top) |
| 974 { |
| 975 float Lbuf[91][32][2]; |
| 976 float Rbuf[91][32][2]; |
| 977 const int len = 32; |
| 978 int is34 = ps->is34bands; |
| 979 |
| 980 top += NR_BANDS[is34] - 64; |
| 981 memset(ps->delay+top, 0, (NR_BANDS[is34] - top)*sizeof(ps->delay[0])); |
| 982 if (top < NR_ALLPASS_BANDS[is34]) |
| 983 memset(ps->ap_delay + top, 0, (NR_ALLPASS_BANDS[is34] - top)*sizeof(ps->
ap_delay[0])); |
| 984 |
| 985 hybrid_analysis(Lbuf, ps->in_buf, L, is34, len); |
| 986 decorrelation(ps, Rbuf, Lbuf, is34); |
| 987 stereo_processing(ps, Lbuf, Rbuf, is34); |
| 988 hybrid_synthesis(L, Lbuf, is34, len); |
| 989 hybrid_synthesis(R, Rbuf, is34, len); |
| 990 |
| 991 return 0; |
| 992 } |
| 993 |
| 994 #define PS_INIT_VLC_STATIC(num, size) \ |
| 995 INIT_VLC_STATIC(&vlc_ps[num], 9, ps_tmp[num].table_size / ps_tmp[num].elem_s
ize, \ |
| 996 ps_tmp[num].ps_bits, 1, 1,
\ |
| 997 ps_tmp[num].ps_codes, ps_tmp[num].elem_size, ps_tmp[num].ele
m_size, \ |
| 998 size); |
| 999 |
| 1000 #define PS_VLC_ROW(name) \ |
| 1001 { name ## _codes, name ## _bits, sizeof(name ## _codes), sizeof(name ## _cod
es[0]) } |
| 1002 |
| 1003 av_cold void ff_ps_init(void) { |
| 1004 // Syntax initialization |
| 1005 static const struct { |
| 1006 const void *ps_codes, *ps_bits; |
| 1007 const unsigned int table_size, elem_size; |
| 1008 } ps_tmp[] = { |
| 1009 PS_VLC_ROW(huff_iid_df1), |
| 1010 PS_VLC_ROW(huff_iid_dt1), |
| 1011 PS_VLC_ROW(huff_iid_df0), |
| 1012 PS_VLC_ROW(huff_iid_dt0), |
| 1013 PS_VLC_ROW(huff_icc_df), |
| 1014 PS_VLC_ROW(huff_icc_dt), |
| 1015 PS_VLC_ROW(huff_ipd_df), |
| 1016 PS_VLC_ROW(huff_ipd_dt), |
| 1017 PS_VLC_ROW(huff_opd_df), |
| 1018 PS_VLC_ROW(huff_opd_dt), |
| 1019 }; |
| 1020 |
| 1021 PS_INIT_VLC_STATIC(0, 1544); |
| 1022 PS_INIT_VLC_STATIC(1, 832); |
| 1023 PS_INIT_VLC_STATIC(2, 1024); |
| 1024 PS_INIT_VLC_STATIC(3, 1036); |
| 1025 PS_INIT_VLC_STATIC(4, 544); |
| 1026 PS_INIT_VLC_STATIC(5, 544); |
| 1027 PS_INIT_VLC_STATIC(6, 512); |
| 1028 PS_INIT_VLC_STATIC(7, 512); |
| 1029 PS_INIT_VLC_STATIC(8, 512); |
| 1030 PS_INIT_VLC_STATIC(9, 512); |
| 1031 |
| 1032 ps_tableinit(); |
| 1033 } |
| 1034 |
| 1035 av_cold void ff_ps_ctx_init(PSContext *ps) |
| 1036 { |
| 1037 } |
| OLD | NEW |
|---|
Chromium Code Reviews
Issue 2850032:
ffmpeg update to june 23 version which fixes mp4 crash on still frames with 3... (Closed)
Base URL: svn://chrome-svn/chrome/trunk/deps/third_party/ffmpeg/