Tristan Matthews | 0a329cc | 2013-07-17 13:20:14 -0400 | [diff] [blame] | 1 | /*************************************************************************** |
| 2 | ** |
| 3 | ** ITU-T G.722.1 (2005-05) - Fixed point implementation for main body and Annex C |
| 4 | ** > Software Release 2.1 (2008-06) |
| 5 | ** (Simple repackaging; no change from 2005-05 Release 2.0 code) |
| 6 | ** |
| 7 | ** © 2004 Polycom, Inc. |
| 8 | ** |
| 9 | ** All rights reserved. |
| 10 | ** |
| 11 | ***************************************************************************/ |
| 12 | |
| 13 | /*************************************************************************** |
| 14 | Filename: decoder.c |
| 15 | |
| 16 | Purpose: Contains files used to implement the G.722.1 Annex C decoder |
| 17 | |
| 18 | Design Notes: |
| 19 | |
| 20 | ***************************************************************************/ |
| 21 | |
| 22 | /*************************************************************************** |
| 23 | Include files |
| 24 | ***************************************************************************/ |
| 25 | #include "defs.h" |
| 26 | #include "tables.h" |
| 27 | #include "huff_def.h" |
| 28 | #include "count.h" |
| 29 | |
| 30 | |
| 31 | /*************************************************************************** |
| 32 | Function: decoder |
| 33 | |
| 34 | Syntax: void decoder(Bit_Obj *bitobj, |
| 35 | Rand_Obj *randobj, |
| 36 | Word16 number_of_regions, |
| 37 | Word16 *decoder_mlt_coefs, |
| 38 | Word16 *p_mag_shift, |
| 39 | Word16 *p_old_mag_shift, |
| 40 | Word16 *old_decoder_mlt_coefs, |
| 41 | Word16 frame_error_flag) |
| 42 | |
| 43 | inputs: Bit_Obj *bitobj |
| 44 | Rand_Obj *randobj |
| 45 | Word16 number_of_regions |
| 46 | Word16 *p_old_mag_shift |
| 47 | Word16 *old_decoder_mlt_coefs |
| 48 | Word16 frame_error_flag |
| 49 | |
| 50 | outputs: Word16 *decoder_mlt_coefs, |
| 51 | Word16 *p_mag_shift, |
| 52 | |
| 53 | |
| 54 | |
| 55 | Description: Decodes the out_words into mlt coefs using G.722.1 Annex C |
| 56 | |
| 57 | Design Notes: |
| 58 | |
| 59 | WMOPS: 7kHz | 24kbit | 32kbit |
| 60 | -------|-------------|---------------- |
| 61 | AVG | 0.84 | 0.94 |
| 62 | -------|-------------|---------------- |
| 63 | MAX | 0.90 | 1.00 |
| 64 | -------|-------------|---------------- |
| 65 | |
| 66 | 14kHz | 24kbit | 32kbit | 48kbit |
| 67 | -------|-------------|----------------|---------------- |
| 68 | AVG | 1.31 | 1.56 | 1.88 |
| 69 | -------|-------------|----------------|---------------- |
| 70 | MAX | 1.59 | 1.80 | 1.98 |
| 71 | -------|-------------|----------------|---------------- |
| 72 | |
| 73 | ***************************************************************************/ |
| 74 | void decoder(Bit_Obj *bitobj, |
| 75 | Rand_Obj *randobj, |
| 76 | Word16 number_of_regions, |
| 77 | Word16 *decoder_mlt_coefs, |
| 78 | Word16 *p_mag_shift, |
| 79 | Word16 *p_old_mag_shift, |
| 80 | Word16 *old_decoder_mlt_coefs, |
| 81 | Word16 frame_error_flag) |
| 82 | { |
| 83 | |
| 84 | |
| 85 | Word16 absolute_region_power_index[MAX_NUMBER_OF_REGIONS]; |
| 86 | Word16 decoder_power_categories[MAX_NUMBER_OF_REGIONS]; |
| 87 | Word16 decoder_category_balances[MAX_NUM_CATEGORIZATION_CONTROL_POSSIBILITIES-1]; |
| 88 | UWord16 categorization_control; |
| 89 | Word16 decoder_region_standard_deviation[MAX_NUMBER_OF_REGIONS]; |
| 90 | Word16 i; |
| 91 | |
| 92 | Word16 num_categorization_control_bits; |
| 93 | Word16 num_categorization_control_possibilities; |
| 94 | Word16 number_of_coefs; |
| 95 | Word16 number_of_valid_coefs; |
| 96 | |
| 97 | |
| 98 | test(); |
| 99 | if (number_of_regions==NUMBER_OF_REGIONS) |
| 100 | { |
| 101 | num_categorization_control_bits = NUM_CATEGORIZATION_CONTROL_BITS; |
| 102 | move16(); |
| 103 | num_categorization_control_possibilities = NUM_CATEGORIZATION_CONTROL_POSSIBILITIES; |
| 104 | move16(); |
| 105 | number_of_coefs = DCT_LENGTH; |
| 106 | move16(); |
| 107 | number_of_valid_coefs = NUMBER_OF_VALID_COEFS; |
| 108 | move16(); |
| 109 | } |
| 110 | else |
| 111 | { |
| 112 | num_categorization_control_bits = MAX_NUM_CATEGORIZATION_CONTROL_BITS; |
| 113 | move16(); |
| 114 | num_categorization_control_possibilities = MAX_NUM_CATEGORIZATION_CONTROL_POSSIBILITIES; |
| 115 | move16(); |
| 116 | number_of_coefs = MAX_DCT_LENGTH; |
| 117 | move16(); |
| 118 | number_of_valid_coefs = MAX_NUMBER_OF_VALID_COEFS; |
| 119 | move16(); |
| 120 | } |
| 121 | |
| 122 | test(); |
| 123 | if (frame_error_flag == 0) |
| 124 | { |
| 125 | |
| 126 | /* convert the bits to absolute region power index and decoder_region_standard_deviation */ |
| 127 | |
| 128 | decode_envelope(bitobj, |
| 129 | number_of_regions, |
| 130 | decoder_region_standard_deviation, |
| 131 | absolute_region_power_index, |
| 132 | p_mag_shift); |
| 133 | |
| 134 | /* fill the categorization_control with NUM_CATEGORIZATION_CONTROL_BITS */ |
| 135 | categorization_control = 0; |
| 136 | for (i=0; i<num_categorization_control_bits; i++) |
| 137 | { |
| 138 | get_next_bit(bitobj); |
| 139 | categorization_control = shl_nocheck(categorization_control,1); |
| 140 | categorization_control = add(categorization_control,bitobj->next_bit); |
| 141 | } |
| 142 | |
| 143 | bitobj->number_of_bits_left = sub(bitobj->number_of_bits_left,num_categorization_control_bits); |
| 144 | |
| 145 | /* obtain decoder power categories and category balances */ |
| 146 | /* based on the absolute region power index */ |
| 147 | categorize(bitobj->number_of_bits_left, |
| 148 | number_of_regions, |
| 149 | num_categorization_control_possibilities, |
| 150 | absolute_region_power_index, |
| 151 | decoder_power_categories, |
| 152 | decoder_category_balances); |
| 153 | |
| 154 | /* perform adjustmaents to the power categories and category balances based on the cat control */ |
| 155 | rate_adjust_categories(categorization_control, |
| 156 | decoder_power_categories, |
| 157 | decoder_category_balances); |
| 158 | |
| 159 | /* decode the quantized bits into mlt coefs */ |
| 160 | decode_vector_quantized_mlt_indices(bitobj, |
| 161 | randobj, |
| 162 | number_of_regions, |
| 163 | decoder_region_standard_deviation, |
| 164 | decoder_power_categories, |
| 165 | decoder_mlt_coefs); |
| 166 | |
| 167 | /* test for frame errors */ |
| 168 | test_4_frame_errors(bitobj, |
| 169 | number_of_regions, |
| 170 | num_categorization_control_possibilities, |
| 171 | &frame_error_flag, |
| 172 | categorization_control, |
| 173 | absolute_region_power_index); |
| 174 | } |
| 175 | |
| 176 | /* perform error handling operations */ |
| 177 | error_handling(number_of_coefs, |
| 178 | number_of_valid_coefs, |
| 179 | &frame_error_flag, |
| 180 | decoder_mlt_coefs, |
| 181 | old_decoder_mlt_coefs, |
| 182 | p_mag_shift, |
| 183 | p_old_mag_shift); |
| 184 | |
| 185 | } |
| 186 | |
| 187 | /*************************************************************************** |
| 188 | Function: decode_envelope |
| 189 | |
| 190 | Syntax: void decode_envelope(Bit_Obj *bitobj, |
| 191 | Word16 number_of_regions, |
| 192 | Word16 *decoder_region_standard_deviation, |
| 193 | Word16 *absolute_region_power_index, |
| 194 | Word16 *p_mag_shift) |
| 195 | |
| 196 | inputs: Bit_Obj *bitobj |
| 197 | Word16 number_of_regions |
| 198 | |
| 199 | |
| 200 | outputs: Word16 *decoder_region_standard_deviation |
| 201 | Word16 *absolute_region_power_index |
| 202 | Word16 *p_mag_shift |
| 203 | |
| 204 | |
| 205 | Description: Recover differential_region_power_index from code bits |
| 206 | |
| 207 | Design Notes: |
| 208 | |
| 209 | WMOPS: 7kHz | 24kbit | 32kbit |
| 210 | -------|--------------|---------------- |
| 211 | AVG | 0.04 | 0.04 |
| 212 | -------|--------------|---------------- |
| 213 | MAX | 0.05 | 0.05 |
| 214 | -------|--------------|---------------- |
| 215 | |
| 216 | 14kHz | 24kbit | 32kbit | 48kbit |
| 217 | -------|--------------|----------------|---------------- |
| 218 | AVG | 0.08 | 0.08 | 0.08 |
| 219 | -------|--------------|----------------|---------------- |
| 220 | MAX | 0.10 | 0.10 | 0.10 |
| 221 | -------|--------------|----------------|---------------- |
| 222 | |
| 223 | ***************************************************************************/ |
| 224 | void decode_envelope(Bit_Obj *bitobj, |
| 225 | Word16 number_of_regions, |
| 226 | Word16 *decoder_region_standard_deviation, |
| 227 | Word16 *absolute_region_power_index, |
| 228 | Word16 *p_mag_shift) |
| 229 | |
| 230 | { |
| 231 | Word16 region; |
| 232 | Word16 i; |
| 233 | Word16 index; |
| 234 | Word16 differential_region_power_index[MAX_NUMBER_OF_REGIONS]; |
| 235 | Word16 max_index; |
| 236 | |
| 237 | Word16 temp; |
| 238 | Word16 temp1; |
| 239 | Word16 temp2; |
| 240 | Word32 acca; |
| 241 | |
| 242 | index = 0; |
| 243 | move16(); |
| 244 | |
| 245 | /* get 5 bits from the current code word */ |
| 246 | for (i=0; i<5; i++) |
| 247 | { |
| 248 | get_next_bit(bitobj); |
| 249 | index = shl_nocheck(index,1); |
| 250 | index = add(index,bitobj->next_bit); |
| 251 | } |
| 252 | bitobj->number_of_bits_left = sub(bitobj->number_of_bits_left,5); |
| 253 | |
| 254 | /* ESF_ADJUSTMENT_TO_RMS_INDEX compensates for the current (9/30/96) |
| 255 | IMLT being scaled to high by the ninth power of sqrt(2). */ |
| 256 | differential_region_power_index[0] = sub(index,ESF_ADJUSTMENT_TO_RMS_INDEX); |
| 257 | move16(); |
| 258 | |
| 259 | /* obtain differential_region_power_index */ |
| 260 | for (region=1; region<number_of_regions; region++) |
| 261 | { |
| 262 | index = 0; |
| 263 | move16(); |
| 264 | do |
| 265 | { |
| 266 | get_next_bit(bitobj); |
| 267 | test(); |
| 268 | if (bitobj->next_bit == 0) |
| 269 | { |
| 270 | index = differential_region_power_decoder_tree[region][index][0]; |
| 271 | move16(); |
| 272 | } |
| 273 | else |
| 274 | { |
| 275 | index = differential_region_power_decoder_tree[region][index][1]; |
| 276 | move16(); |
| 277 | } |
| 278 | bitobj->number_of_bits_left = sub(bitobj->number_of_bits_left,1); |
| 279 | test(); |
| 280 | } while (index > 0); |
| 281 | |
| 282 | differential_region_power_index[region] = negate(index); |
| 283 | move16(); |
| 284 | } |
| 285 | |
| 286 | /* Reconstruct absolute_region_power_index[] from differential_region_power_index[]. */ |
| 287 | absolute_region_power_index[0] = differential_region_power_index[0]; |
| 288 | move16(); |
| 289 | for (region=1; region<number_of_regions; region++) |
| 290 | { |
| 291 | acca = L_add(absolute_region_power_index[region-1],differential_region_power_index[region]); |
| 292 | acca = L_add(acca,DRP_DIFF_MIN); |
| 293 | absolute_region_power_index[region] = extract_l(acca); |
| 294 | } |
| 295 | |
| 296 | /* Reconstruct decoder_region_standard_deviation[] from absolute_region_power_index[]. */ |
| 297 | /* DEBUG!!!! - This integer method jointly computes the mag_shift |
| 298 | and the standard deviations already mag_shift compensated. It |
| 299 | relies on REGION_POWER_STEPSIZE_DB being exactly 3.010299957 db |
| 300 | or a square root of 2 chnage in standard deviation. If |
| 301 | REGION_POWER_STEPSIZE_DB changes, this software must be |
| 302 | reworked. */ |
| 303 | |
| 304 | temp = 0; |
| 305 | move16(); |
| 306 | max_index = 0; |
| 307 | move16(); |
| 308 | for (region=0; region<number_of_regions; region++) |
| 309 | { |
| 310 | acca = L_add(absolute_region_power_index[region],REGION_POWER_TABLE_NUM_NEGATIVES); |
| 311 | i = extract_l(acca); |
| 312 | |
| 313 | temp1 = sub(i,max_index); |
| 314 | test(); |
| 315 | if (temp1 > 0) |
| 316 | { |
| 317 | max_index = i; |
| 318 | move16(); |
| 319 | } |
| 320 | temp = add(temp,int_region_standard_deviation_table[i]); |
| 321 | } |
| 322 | i = 9; |
| 323 | move16(); |
| 324 | |
| 325 | temp1 = sub(temp,8); |
| 326 | temp2 = sub(max_index,28); |
| 327 | test(); |
| 328 | test(); |
| 329 | logic16(); |
| 330 | test(); |
| 331 | logic16(); |
| 332 | while ((i >= 0) && ((temp1 >= 0) || (temp2 > 0))) |
| 333 | { |
| 334 | i = sub(i,1); |
| 335 | temp = shr_nocheck(temp,1); |
| 336 | max_index = sub(max_index,2); |
| 337 | temp1 = sub(temp,8); |
| 338 | temp2 = sub(max_index,28); |
| 339 | test(); |
| 340 | test(); |
| 341 | logic16(); |
| 342 | test(); |
| 343 | logic16(); |
| 344 | } |
| 345 | |
| 346 | *p_mag_shift = i; |
| 347 | move16(); |
| 348 | |
| 349 | /* pointer arithmetic */ |
| 350 | temp = (Word16 )(REGION_POWER_TABLE_NUM_NEGATIVES + (*p_mag_shift * 2)); |
| 351 | |
| 352 | for (region=0; region<number_of_regions; region++) |
| 353 | { |
| 354 | acca = L_add(absolute_region_power_index[region],temp); |
| 355 | i = extract_l(acca); |
| 356 | decoder_region_standard_deviation[region] = int_region_standard_deviation_table[i]; |
| 357 | move16(); |
| 358 | } |
| 359 | |
| 360 | } |
| 361 | |
| 362 | /*************************************************************************** |
| 363 | Function: rate_adjust_categories |
| 364 | |
| 365 | Syntax: void rate_adjust_categories(Word16 categorization_control, |
| 366 | Word16 *decoder_power_categories, |
| 367 | Word16 *decoder_category_balances) |
| 368 | |
| 369 | inputs: Word16 categorization_control, |
| 370 | Word16 *decoder_power_categories, |
| 371 | Word16 *decoder_category_balances |
| 372 | |
| 373 | outputs: Word16 categorization_control, |
| 374 | Word16 *decoder_power_categories, |
| 375 | |
| 376 | Description: Adjust the power categories based on the categorization control |
| 377 | |
| 378 | Design Notes: |
| 379 | |
| 380 | WMOPS: 7kHz | 24kbit | 32kbit |
| 381 | -------|--------------|---------------- |
| 382 | AVG | 0.00 | 0.00 |
| 383 | -------|--------------|---------------- |
| 384 | MAX | 0.00 | 0.00 |
| 385 | -------|--------------|---------------- |
| 386 | |
| 387 | 14kHz | 24kbit | 32kbit | 48kbit |
| 388 | -------|--------------|----------------|---------------- |
| 389 | AVG | 0.00 | 0.00 | 0.00 |
| 390 | -------|--------------|----------------|---------------- |
| 391 | MAX | 0.01 | 0.01 | 0.01 |
| 392 | -------|--------------|----------------|---------------- |
| 393 | |
| 394 | ***************************************************************************/ |
| 395 | void rate_adjust_categories(Word16 categorization_control, |
| 396 | Word16 *decoder_power_categories, |
| 397 | Word16 *decoder_category_balances) |
| 398 | { |
| 399 | Word16 i; |
| 400 | Word16 region; |
| 401 | |
| 402 | i = 0; |
| 403 | move16(); |
| 404 | |
| 405 | test(); |
| 406 | while (categorization_control > 0) |
| 407 | { |
| 408 | region = decoder_category_balances[i++]; |
| 409 | move16(); |
| 410 | decoder_power_categories[region] = add(decoder_power_categories[region],1); |
| 411 | move16(); |
| 412 | categorization_control = sub(categorization_control,1); |
| 413 | } |
| 414 | |
| 415 | } |
| 416 | |
| 417 | /*************************************************************************** |
| 418 | Function: decode_vector_quantized_mlt_indices |
| 419 | |
| 420 | Syntax: void decode_vector_quantized_mlt_indices(Bit_Obj *bitobj, |
| 421 | Rand_Obj *randobj, |
| 422 | Word16 number_of_regions, |
| 423 | Word16 *decoder_region_standard_deviation, |
| 424 | Word16 *decoder_power_categories, |
| 425 | Word16 *decoder_mlt_coefs) |
| 426 | inputs: Bit_Obj *bitobj |
| 427 | Rand_Obj *randobj |
| 428 | Word16 number_of_regions |
| 429 | Word16 *decoder_region_standard_deviation |
| 430 | Word16 *decoder_power_categories |
| 431 | |
| 432 | |
| 433 | outputs: Word16 *decoder_mlt_coefs |
| 434 | |
| 435 | |
| 436 | Description: Decode MLT coefficients |
| 437 | |
| 438 | Design Notes: |
| 439 | |
| 440 | WMOPS: 7kHz | 24kbit | 32kbit |
| 441 | -------|--------------|---------------- |
| 442 | AVG | 0.60 | 0.72 |
| 443 | -------|--------------|---------------- |
| 444 | MAX | 0.67 | 0.76 |
| 445 | -------|--------------|---------------- |
| 446 | |
| 447 | 14kHz | 24kbit | 32kbit | 48kbit |
| 448 | -------|--------------|----------------|---------------- |
| 449 | AVG | 0.77 | 0.98 | 1.28 |
| 450 | -------|--------------|----------------|---------------- |
| 451 | MAX | 1.05 | 1.18 | 1.36 |
| 452 | -------|--------------|----------------|---------------- |
| 453 | |
| 454 | ***************************************************************************/ |
| 455 | void decode_vector_quantized_mlt_indices(Bit_Obj *bitobj, |
| 456 | Rand_Obj *randobj, |
| 457 | Word16 number_of_regions, |
| 458 | Word16 *decoder_region_standard_deviation, |
| 459 | Word16 *decoder_power_categories, |
| 460 | Word16 *decoder_mlt_coefs) |
| 461 | { |
| 462 | Word16 standard_deviation; |
| 463 | Word16 *decoder_mlt_ptr; |
| 464 | Word16 decoder_mlt_value; |
| 465 | Word16 noifillpos; |
| 466 | Word16 noifillneg; |
| 467 | Word16 noise_fill_factor[3] = {5793,8192,23170}; |
| 468 | Word16 region; |
| 469 | Word16 category; |
| 470 | Word16 j,n; |
| 471 | Word16 k[MAX_VECTOR_DIMENSION]; |
| 472 | Word16 vec_dim; |
| 473 | Word16 num_vecs; |
| 474 | Word16 index; |
| 475 | Word16 bit=0; |
| 476 | Word16 signs_index=0; |
| 477 | Word16 num_sign_bits; |
| 478 | Word16 ran_out_of_bits_flag; |
| 479 | Word16 *decoder_table_ptr; |
| 480 | Word16 random_word; |
| 481 | |
| 482 | Word16 temp1; |
| 483 | Word16 temp; |
| 484 | Word32 acca; |
| 485 | |
| 486 | ran_out_of_bits_flag = 0; |
| 487 | move16(); |
| 488 | |
| 489 | for (region=0; region<number_of_regions; region++) |
| 490 | { |
| 491 | category = (Word16)decoder_power_categories[region]; |
| 492 | move16(); |
| 493 | acca = L_mult0(region,REGION_SIZE); |
| 494 | index = extract_l(acca); |
| 495 | decoder_mlt_ptr = &decoder_mlt_coefs[index]; |
| 496 | move16(); |
| 497 | standard_deviation = decoder_region_standard_deviation[region]; |
| 498 | move16(); |
| 499 | |
| 500 | temp = sub(category,7); |
| 501 | test(); |
| 502 | if (temp < 0) |
| 503 | { |
| 504 | /* Get the proper table of decoder tables, vec_dim, and num_vecs for the cat */ |
| 505 | decoder_table_ptr = (Word16 *) table_of_decoder_tables[category]; |
| 506 | move16(); |
| 507 | vec_dim = vector_dimension[category]; |
| 508 | move16(); |
| 509 | num_vecs = number_of_vectors[category]; |
| 510 | move16(); |
| 511 | |
| 512 | for (n=0; n<num_vecs; n++) |
| 513 | { |
| 514 | index = 0; |
| 515 | move16(); |
| 516 | |
| 517 | /* get index */ |
| 518 | do |
| 519 | { |
| 520 | test(); |
| 521 | if (bitobj->number_of_bits_left <= 0) |
| 522 | { |
| 523 | ran_out_of_bits_flag = 1; |
| 524 | move16(); |
| 525 | break; |
| 526 | } |
| 527 | |
| 528 | get_next_bit(bitobj); |
| 529 | |
| 530 | test(); |
| 531 | if (bitobj->next_bit == 0) |
| 532 | { |
| 533 | temp = shl_nocheck(index,1); |
| 534 | index = (Word16)*(decoder_table_ptr + temp); |
| 535 | move16(); |
| 536 | } |
| 537 | else |
| 538 | { |
| 539 | temp = shl_nocheck(index,1); |
| 540 | index = (Word16)*(decoder_table_ptr + temp + 1); |
| 541 | move16(); |
| 542 | } |
| 543 | bitobj->number_of_bits_left = sub(bitobj->number_of_bits_left,1); |
| 544 | test(); |
| 545 | |
| 546 | } while (index > 0); |
| 547 | |
| 548 | test(); |
| 549 | if (ran_out_of_bits_flag != 0) |
| 550 | break; |
| 551 | |
| 552 | index = negate(index); |
| 553 | |
| 554 | /* convert index into array used to access the centroid table */ |
| 555 | /* get the number of sign bits in the index */ |
| 556 | num_sign_bits = index_to_array(index,k,category); |
| 557 | |
| 558 | temp = sub(bitobj->number_of_bits_left,num_sign_bits); |
| 559 | test(); |
| 560 | if (temp >= 0) |
| 561 | { |
| 562 | |
| 563 | test(); |
| 564 | if (num_sign_bits != 0) |
| 565 | { |
| 566 | signs_index = 0; |
| 567 | move16(); |
| 568 | for (j=0; j<num_sign_bits; j++) |
| 569 | { |
| 570 | get_next_bit(bitobj); |
| 571 | signs_index = shl_nocheck(signs_index,1); |
| 572 | signs_index = add(signs_index,bitobj->next_bit); |
| 573 | bitobj->number_of_bits_left = sub(bitobj->number_of_bits_left,1); |
| 574 | } |
| 575 | temp = sub(num_sign_bits,1); |
| 576 | bit = shl_nocheck(1,(temp)); |
| 577 | } |
| 578 | |
| 579 | for (j=0; j<vec_dim; j++) |
| 580 | { |
| 581 | acca = L_mult0(standard_deviation,mlt_quant_centroid[category][k[j]]); |
| 582 | acca = L_shr_nocheck(acca,12); |
| 583 | decoder_mlt_value = extract_l(acca); |
| 584 | |
| 585 | test(); |
| 586 | if (decoder_mlt_value != 0) |
| 587 | { |
| 588 | test(); |
| 589 | if ((signs_index & bit) == 0) |
| 590 | decoder_mlt_value = negate(decoder_mlt_value); |
| 591 | bit = shr_nocheck(bit,1); |
| 592 | } |
| 593 | *decoder_mlt_ptr++ = decoder_mlt_value; |
| 594 | move16(); |
| 595 | } |
| 596 | } |
| 597 | else |
| 598 | { |
| 599 | ran_out_of_bits_flag = 1; |
| 600 | move16(); |
| 601 | break; |
| 602 | } |
| 603 | } |
| 604 | /* If ran out of bits during decoding do noise fill for remaining regions. */ |
| 605 | /* DEBUG!! - For now also redo all of last region with all noise fill. */ |
| 606 | test(); |
| 607 | if (ran_out_of_bits_flag != 0) |
| 608 | { |
| 609 | temp = add(region,1); |
| 610 | for (j=temp; j<number_of_regions; j++) |
| 611 | { |
| 612 | decoder_power_categories[j] = 7; |
| 613 | move16(); |
| 614 | } |
| 615 | category = 7; |
| 616 | move16(); |
| 617 | decoder_mlt_ptr = &decoder_mlt_coefs[region*REGION_SIZE]; |
| 618 | move16(); |
| 619 | } |
| 620 | } |
| 621 | |
| 622 | temp = sub(category,5); |
| 623 | temp1 = sub(category,6); |
| 624 | test(); |
| 625 | test(); |
| 626 | logic16(); |
| 627 | if ((temp == 0) || (temp1 == 0)) |
| 628 | { |
| 629 | |
| 630 | decoder_mlt_ptr = &decoder_mlt_coefs[region*REGION_SIZE]; |
| 631 | move16(); |
| 632 | noifillpos = mult(standard_deviation,noise_fill_factor[category - 5]); |
| 633 | noifillneg = negate(noifillpos); |
| 634 | |
| 635 | random_word = get_rand(randobj); |
| 636 | |
| 637 | for (j=0; j<10; j++) |
| 638 | { |
| 639 | test(); |
| 640 | if (*decoder_mlt_ptr == 0) |
| 641 | { |
| 642 | logic16(); |
| 643 | test(); |
| 644 | if ((random_word & 1) == 0) |
| 645 | { |
| 646 | temp1 = noifillneg; |
| 647 | move16(); |
| 648 | } |
| 649 | else |
| 650 | { |
| 651 | temp1 = noifillpos; |
| 652 | move16(); |
| 653 | } |
| 654 | *decoder_mlt_ptr = temp1; |
| 655 | move16(); |
| 656 | random_word = shr_nocheck(random_word,1); |
| 657 | } |
| 658 | /* pointer arithmetic */ |
| 659 | decoder_mlt_ptr++; |
| 660 | } |
| 661 | random_word = get_rand(randobj); |
| 662 | for (j=0; j<10; j++) |
| 663 | { |
| 664 | test(); |
| 665 | if (*decoder_mlt_ptr == 0) |
| 666 | { |
| 667 | logic16(); |
| 668 | test(); |
| 669 | if ((random_word & 1) == 0) |
| 670 | { |
| 671 | temp1 = noifillneg; |
| 672 | move16(); |
| 673 | } |
| 674 | else |
| 675 | { |
| 676 | temp1 = noifillpos; |
| 677 | move16(); |
| 678 | } |
| 679 | *decoder_mlt_ptr = temp1; |
| 680 | move16(); |
| 681 | random_word = shr_nocheck(random_word,1); |
| 682 | } |
| 683 | /* pointer arithmetic */ |
| 684 | decoder_mlt_ptr++; |
| 685 | } |
| 686 | } |
| 687 | |
| 688 | /* if (category == 7) */ |
| 689 | temp1 = sub(category,7); |
| 690 | test(); |
| 691 | if (temp1 == 0) |
| 692 | { |
| 693 | index = sub(category,5); |
| 694 | noifillpos = mult(standard_deviation,noise_fill_factor[index]); |
| 695 | noifillneg = negate(noifillpos); |
| 696 | |
| 697 | random_word = get_rand(randobj); |
| 698 | for (j=0; j<10; j++) |
| 699 | { |
| 700 | logic16(); |
| 701 | test(); |
| 702 | if ((random_word & 1) == 0) |
| 703 | { |
| 704 | temp1 = noifillneg; |
| 705 | move16(); |
| 706 | } |
| 707 | else |
| 708 | { |
| 709 | temp1 = noifillpos; |
| 710 | move16(); |
| 711 | } |
| 712 | *decoder_mlt_ptr++ = temp1; |
| 713 | move16(); |
| 714 | random_word = shr_nocheck(random_word,1); |
| 715 | } |
| 716 | random_word = get_rand(randobj); |
| 717 | for (j=0; j<10; j++) |
| 718 | { |
| 719 | logic16(); |
| 720 | test(); |
| 721 | if ((random_word & 1) == 0) |
| 722 | { |
| 723 | temp1 = noifillneg; |
| 724 | move16(); |
| 725 | } |
| 726 | else |
| 727 | { |
| 728 | temp1 = noifillpos; |
| 729 | move16(); |
| 730 | } |
| 731 | |
| 732 | *decoder_mlt_ptr++ = temp1; |
| 733 | move16(); |
| 734 | random_word = shr_nocheck(random_word,1); |
| 735 | } |
| 736 | } |
| 737 | } |
| 738 | |
| 739 | test(); |
| 740 | if (ran_out_of_bits_flag) |
| 741 | bitobj->number_of_bits_left = sub(bitobj->number_of_bits_left,1); |
| 742 | } |
| 743 | /**************************************************************************************** |
| 744 | Function: index_to_array |
| 745 | |
| 746 | Syntax: number_of_non_zero = index_to_array(Word16 index, |
| 747 | Word16 array[MAX_VECTOR_DIMENSION], |
| 748 | Word16 category) |
| 749 | |
| 750 | inputs: Word16 index |
| 751 | Word16 category |
| 752 | |
| 753 | outputs: Word16 array[MAX_VECTOR_DIMENSION] - used in decoder to access |
| 754 | mlt_quant_centroid table |
| 755 | |
| 756 | Word16 number_of_non_zero - number of non zero elements |
| 757 | in the array |
| 758 | |
| 759 | Description: Computes an array of sign bits with the length of the category vector |
| 760 | Returns the number of sign bits and the array |
| 761 | |
| 762 | WMOPS: 7kHz | 24kbit | 32kbit |
| 763 | -------|--------------|---------------- |
| 764 | AVG | 0.00 | 0.00 |
| 765 | -------|--------------|---------------- |
| 766 | MAX | 0.00 | 0.00 |
| 767 | -------|--------------|---------------- |
| 768 | |
| 769 | 14kHz | 24kbit | 32kbit | 48kbit |
| 770 | -------|--------------|----------------|---------------- |
| 771 | AVG | 0.00 | 0.00 | 0.00 |
| 772 | -------|--------------|----------------|---------------- |
| 773 | MAX | 0.00 | 0.00 | 0.00 |
| 774 | -------|--------------|----------------|---------------- |
| 775 | |
| 776 | ****************************************************************************************/ |
| 777 | Word16 index_to_array(Word16 index,Word16 *array,Word16 category) |
| 778 | { |
| 779 | Word16 j,q,p; |
| 780 | Word16 number_of_non_zero; |
| 781 | Word16 max_bin_plus_one; |
| 782 | Word16 inverse_of_max_bin_plus_one; |
| 783 | Word16 temp; |
| 784 | |
| 785 | number_of_non_zero = 0; |
| 786 | move16(); |
| 787 | |
| 788 | p = index; |
| 789 | move16(); |
| 790 | |
| 791 | max_bin_plus_one = add(max_bin[category],1); |
| 792 | inverse_of_max_bin_plus_one = max_bin_plus_one_inverse[category]; |
| 793 | move16(); |
| 794 | |
| 795 | temp = sub(vector_dimension[category],1); |
| 796 | for (j=temp; j>=0; j--) |
| 797 | { |
| 798 | q = mult(p,inverse_of_max_bin_plus_one); |
| 799 | temp = extract_l(L_mult0(q,max_bin_plus_one)); |
| 800 | array[j] = sub(p,temp); |
| 801 | move16(); |
| 802 | |
| 803 | p = q; |
| 804 | move16(); |
| 805 | |
| 806 | temp = array[j]; |
| 807 | move16(); |
| 808 | test(); |
| 809 | if (temp != 0) |
| 810 | number_of_non_zero = add(number_of_non_zero,1); |
| 811 | } |
| 812 | return(number_of_non_zero); |
| 813 | } |
| 814 | /*************************************************************************** |
| 815 | Function: test_4_frame_errors |
| 816 | |
| 817 | Syntax: void test_4_frame_errors(Bit_Obj *bitobj, |
| 818 | Word16 number_of_regions, |
| 819 | Word16 num_categorization_control_possibilities, |
| 820 | Word16 *frame_error_flag, |
| 821 | Word16 categorization_control, |
| 822 | Word16 *absolute_region_power_index) |
| 823 | |
| 824 | inputs: bit_obj |
| 825 | number_of_regions |
| 826 | num_categorization_control_possibilities |
| 827 | frame_error_flag |
| 828 | categorization_control |
| 829 | absolute_region_power_index |
| 830 | |
| 831 | |
| 832 | outputs: frame_error_flag |
| 833 | |
| 834 | |
| 835 | |
| 836 | |
| 837 | Description: Tests for error conditions and sets the frame_error_flag accordingly |
| 838 | |
| 839 | Design Notes: |
| 840 | |
| 841 | WMOPS: 7kHz | 24kbit | 32kbit |
| 842 | -------|--------------|---------------- |
| 843 | AVG | 0.01 | 0.01 |
| 844 | -------|--------------|---------------- |
| 845 | MAX | 0.04 | 0.08 |
| 846 | -------|--------------|---------------- |
| 847 | |
| 848 | 14kHz | 24kbit | 32kbit | 48kbit |
| 849 | -------|--------------|----------------|---------------- |
| 850 | AVG | 0.01 | 0.01 | 0.01 |
| 851 | -------|--------------|----------------|---------------- |
| 852 | MAX | 0.02 | 0.06 | 0.08 |
| 853 | -------|--------------|----------------|---------------- |
| 854 | |
| 855 | ***************************************************************************/ |
| 856 | void test_4_frame_errors(Bit_Obj *bitobj, |
| 857 | Word16 number_of_regions, |
| 858 | Word16 num_categorization_control_possibilities, |
| 859 | Word16 *frame_error_flag, |
| 860 | Word16 categorization_control, |
| 861 | Word16 *absolute_region_power_index) |
| 862 | { |
| 863 | Word16 region; |
| 864 | Word16 i; |
| 865 | Word16 temp; |
| 866 | Word32 acca; |
| 867 | Word32 accb; |
| 868 | |
| 869 | /* Test for bit stream errors. */ |
| 870 | |
| 871 | test(); |
| 872 | if (bitobj->number_of_bits_left > 0) |
| 873 | { |
| 874 | for (i=0; i<bitobj->number_of_bits_left; i++) |
| 875 | { |
| 876 | get_next_bit(bitobj); |
| 877 | test(); |
| 878 | if (bitobj->next_bit == 0) |
| 879 | { |
| 880 | *frame_error_flag = 1; |
| 881 | move16(); |
| 882 | } |
| 883 | } |
| 884 | } |
| 885 | else |
| 886 | { |
| 887 | temp = sub(categorization_control,sub(num_categorization_control_possibilities,1)); |
| 888 | test(); |
| 889 | if (temp < 0) |
| 890 | { |
| 891 | test(); |
| 892 | if (bitobj->number_of_bits_left < 0) |
| 893 | { |
| 894 | *frame_error_flag |= 2; |
| 895 | logic16(); |
| 896 | } |
| 897 | } |
| 898 | } |
| 899 | |
| 900 | /* checks to ensure that abs_region_power_index is within range */ |
| 901 | /* the error flag is set if it is out of range */ |
| 902 | for (region=0; region<number_of_regions; region++) |
| 903 | { |
| 904 | /* the next two lines of comments were modified in release 1.2 |
| 905 | * to correct the description of the range of |
| 906 | * absolute_region_power_index[] to be tested in the next |
| 907 | * 9 lines of code. |
| 908 | */ |
| 909 | /* if ((absolute_region_power_index[region] > 31) || |
| 910 | (absolute_region_power_index[region] < -8) */ |
| 911 | |
| 912 | acca = L_add(absolute_region_power_index[region],ESF_ADJUSTMENT_TO_RMS_INDEX); |
| 913 | accb = L_sub(acca,31); |
| 914 | acca = L_add(acca,8); |
| 915 | test(); |
| 916 | |
| 917 | /* the next line was modifed in release 1.2 to |
| 918 | * correct miss typed code and error checking. |
| 919 | */ |
| 920 | if ((accb > 0) || (acca < 0)) |
| 921 | { |
| 922 | *frame_error_flag |= 4; |
| 923 | logic16(); |
| 924 | } |
| 925 | } |
| 926 | |
| 927 | } |
| 928 | /*************************************************************************** |
| 929 | Function: error_handling |
| 930 | |
| 931 | Syntax: void error_handling(Word16 number_of_coefs, |
| 932 | Word16 number_of_valid_coefs, |
| 933 | Word16 *frame_error_flag, |
| 934 | Word16 *decoder_mlt_coefs, |
| 935 | Word16 *old_decoder_mlt_coefs, |
| 936 | Word16 *p_mag_shift, |
| 937 | Word16 *p_old_mag_shift) |
| 938 | |
| 939 | inputs: number_of_coefs |
| 940 | number_of_valid_coefs |
| 941 | frame_error_flag |
| 942 | old_decoder_mlt_coefs |
| 943 | p_old_mag_shift |
| 944 | |
| 945 | |
| 946 | outputs: decoder_mlt_coefs |
| 947 | old_decoder_mlt_coefs |
| 948 | p_mag_shift |
| 949 | p_old_mag_shift |
| 950 | |
| 951 | |
| 952 | |
| 953 | Description: If both the current and previous frames are errored, |
| 954 | set the mlt coefficients to 0. If only the current frame |
| 955 | is errored, then repeat the previous frame's mlt coefficients. |
| 956 | |
| 957 | Design Notes: |
| 958 | |
| 959 | WMOPS: 7kHz | 24kbit | 32kbit |
| 960 | -------|--------------|---------------- |
| 961 | AVG | 0.02 | 0.02 |
| 962 | -------|--------------|---------------- |
| 963 | MAX | 0.03 | 0.03 |
| 964 | -------|--------------|---------------- |
| 965 | |
| 966 | 14kHz | 24kbit | 32kbit | 48kbit |
| 967 | -------|--------------|----------------|---------------- |
| 968 | AVG | 0.03 | 0.03 | 0.03 |
| 969 | -------|--------------|----------------|---------------- |
| 970 | MAX | 0.03 | 0.03 | 0.06 |
| 971 | -------|--------------|----------------|---------------- |
| 972 | |
| 973 | ***************************************************************************/ |
| 974 | void error_handling(Word16 number_of_coefs, |
| 975 | Word16 number_of_valid_coefs, |
| 976 | Word16 *frame_error_flag, |
| 977 | Word16 *decoder_mlt_coefs, |
| 978 | Word16 *old_decoder_mlt_coefs, |
| 979 | Word16 *p_mag_shift, |
| 980 | Word16 *p_old_mag_shift) |
| 981 | { |
| 982 | Word16 i; |
| 983 | |
| 984 | test(); |
| 985 | if (*frame_error_flag != 0) |
| 986 | { |
| 987 | |
| 988 | for (i = 0; i < number_of_valid_coefs; i++) |
| 989 | { |
| 990 | decoder_mlt_coefs[i] = old_decoder_mlt_coefs[i]; |
| 991 | move16(); |
| 992 | } |
| 993 | |
| 994 | for (i = 0; i < number_of_valid_coefs; i++) |
| 995 | { |
| 996 | old_decoder_mlt_coefs[i] = 0; |
| 997 | move16(); |
| 998 | } |
| 999 | |
| 1000 | *p_mag_shift = *p_old_mag_shift; |
| 1001 | move16(); |
| 1002 | |
| 1003 | *p_old_mag_shift = 0; |
| 1004 | move16(); |
| 1005 | } |
| 1006 | else |
| 1007 | { |
| 1008 | /* Store in case next frame is errored. */ |
| 1009 | for (i = 0; i < number_of_valid_coefs; i++) |
| 1010 | { |
| 1011 | old_decoder_mlt_coefs[i] = decoder_mlt_coefs[i]; |
| 1012 | move16(); |
| 1013 | } |
| 1014 | |
| 1015 | *p_old_mag_shift = *p_mag_shift; |
| 1016 | move16(); |
| 1017 | } |
| 1018 | |
| 1019 | |
| 1020 | /* Zero out the upper 1/8 of the spectrum. */ |
| 1021 | for (i = number_of_valid_coefs; i < number_of_coefs; i++) |
| 1022 | { |
| 1023 | decoder_mlt_coefs[i] = 0; |
| 1024 | move16(); |
| 1025 | } |
| 1026 | |
| 1027 | } |
| 1028 | /**************************************************************************************** |
| 1029 | Function: get_next_bit |
| 1030 | |
| 1031 | Syntax: void get_next_bit(Bit_Obj *bitobj) |
| 1032 | |
| 1033 | Description: Returns the next bit in the current word inside the bit object |
| 1034 | |
| 1035 | WMOPS: 7kHz | 24kbit | 32kbit |
| 1036 | -------|--------------|---------------- |
| 1037 | AVG | 0.00 | 0.00 |
| 1038 | -------|--------------|---------------- |
| 1039 | MAX | 0.00 | 0.00 |
| 1040 | -------|--------------|---------------- |
| 1041 | |
| 1042 | 14kHz | 24kbit | 32kbit | 48kbit |
| 1043 | -------|--------------|----------------|---------------- |
| 1044 | AVG | 0.00 | 0.00 | 0.00 |
| 1045 | -------|--------------|----------------|---------------- |
| 1046 | MAX | 0.00 | 0.00 | 0.00 |
| 1047 | -------|--------------|----------------|---------------- |
| 1048 | |
| 1049 | ****************************************************************************************/ |
| 1050 | void get_next_bit(Bit_Obj *bitobj) |
| 1051 | { |
| 1052 | Word16 temp; |
| 1053 | |
| 1054 | test(); |
| 1055 | if (bitobj->code_bit_count == 0) |
| 1056 | { |
| 1057 | bitobj->current_word = *bitobj->code_word_ptr++; |
| 1058 | move16(); |
| 1059 | bitobj->code_bit_count = 16; |
| 1060 | move16(); |
| 1061 | } |
| 1062 | bitobj->code_bit_count = sub(bitobj->code_bit_count,1); |
| 1063 | temp = shr_nocheck(bitobj->current_word,bitobj->code_bit_count); |
| 1064 | logic16(); |
| 1065 | bitobj->next_bit = (Word16 )(temp & 1); |
| 1066 | |
| 1067 | } |
| 1068 | /**************************************************************************************** |
| 1069 | Function: get_rand |
| 1070 | |
| 1071 | Syntax: Word16 get_rand(Rand_Obj *randobj) |
| 1072 | |
| 1073 | Description: Returns a random Word16 based on the seeds inside the rand object |
| 1074 | |
| 1075 | WMOPS: 7kHz | 24kbit | 32kbit |
| 1076 | -------|--------------|---------------- |
| 1077 | AVG | 0.00 | 0.00 |
| 1078 | -------|--------------|---------------- |
| 1079 | MAX | 0.00 | 0.00 |
| 1080 | -------|--------------|---------------- |
| 1081 | |
| 1082 | 14kHz | 24kbit | 32kbit | 48kbit |
| 1083 | -------|--------------|----------------|---------------- |
| 1084 | AVG | 0.00 | 0.00 | 0.00 |
| 1085 | -------|--------------|----------------|---------------- |
| 1086 | MAX | 0.00 | 0.00 | 0.00 |
| 1087 | -------|--------------|----------------|---------------- |
| 1088 | |
| 1089 | ****************************************************************************************/ |
| 1090 | Word16 get_rand(Rand_Obj *randobj) |
| 1091 | { |
| 1092 | Word16 random_word; |
| 1093 | Word32 acca; |
| 1094 | |
| 1095 | acca = L_add(randobj->seed0,randobj->seed3); |
| 1096 | random_word = extract_l(acca); |
| 1097 | |
| 1098 | logic16(); |
| 1099 | test(); |
| 1100 | if ((random_word & 32768L) != 0) |
| 1101 | random_word = add(random_word,1); |
| 1102 | |
| 1103 | randobj->seed3 = randobj->seed2; |
| 1104 | move16(); |
| 1105 | randobj->seed2 = randobj->seed1; |
| 1106 | move16(); |
| 1107 | randobj->seed1 = randobj->seed0; |
| 1108 | move16(); |
| 1109 | randobj->seed0 = random_word; |
| 1110 | move16(); |
| 1111 | |
| 1112 | return(random_word); |
| 1113 | } |