| Line | Branch | Exec | Source |
|---|---|---|---|
| 1 | /* | ||
| 2 | * Simple IDCT | ||
| 3 | * | ||
| 4 | * Copyright (c) 2001 Michael Niedermayer <michaelni@gmx.at> | ||
| 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 | * simpleidct in C. | ||
| 26 | */ | ||
| 27 | |||
| 28 | /* Based upon some commented-out C code from mpeg2dec (idct_mmx.c | ||
| 29 | * written by Aaron Holtzman <aholtzma@ess.engr.uvic.ca>). */ | ||
| 30 | |||
| 31 | #include "bit_depth_template.c" | ||
| 32 | |||
| 33 | #undef W1 | ||
| 34 | #undef W2 | ||
| 35 | #undef W3 | ||
| 36 | #undef W4 | ||
| 37 | #undef W5 | ||
| 38 | #undef W6 | ||
| 39 | #undef W7 | ||
| 40 | #undef ROW_SHIFT | ||
| 41 | #undef COL_SHIFT | ||
| 42 | #undef DC_SHIFT | ||
| 43 | #undef MUL | ||
| 44 | #undef MAC | ||
| 45 | |||
| 46 | #if BIT_DEPTH == 8 | ||
| 47 | |||
| 48 | #define W1 22725 //cos(i*M_PI/16)*sqrt(2)*(1<<14) + 0.5 | ||
| 49 | #define W2 21407 //cos(i*M_PI/16)*sqrt(2)*(1<<14) + 0.5 | ||
| 50 | #define W3 19266 //cos(i*M_PI/16)*sqrt(2)*(1<<14) + 0.5 | ||
| 51 | #define W4 16383 //cos(i*M_PI/16)*sqrt(2)*(1<<14) + 0.5 | ||
| 52 | #define W5 12873 //cos(i*M_PI/16)*sqrt(2)*(1<<14) + 0.5 | ||
| 53 | #define W6 8867 //cos(i*M_PI/16)*sqrt(2)*(1<<14) + 0.5 | ||
| 54 | #define W7 4520 //cos(i*M_PI/16)*sqrt(2)*(1<<14) + 0.5 | ||
| 55 | |||
| 56 | #define ROW_SHIFT 11 | ||
| 57 | #define COL_SHIFT 20 | ||
| 58 | #define DC_SHIFT 3 | ||
| 59 | |||
| 60 | #define MUL(a, b) MUL16(a, b) | ||
| 61 | #define MAC(a, b, c) MAC16(a, b, c) | ||
| 62 | |||
| 63 | #elif BIT_DEPTH == 10 || BIT_DEPTH == 12 || BIT_DEPTH == 16 | ||
| 64 | |||
| 65 | # if BIT_DEPTH == 10 || BIT_DEPTH == 16 | ||
| 66 | #define W1 22725 // 90901 | ||
| 67 | #define W2 21407 // 85627 | ||
| 68 | #define W3 19265 // 77062 | ||
| 69 | #define W4 16384 // 65535 | ||
| 70 | #define W5 12873 // 51491 | ||
| 71 | #define W6 8867 // 35468 | ||
| 72 | #define W7 4520 // 18081 | ||
| 73 | |||
| 74 | # if BIT_DEPTH == 16 | ||
| 75 | /* 16-bit output from 16-bit coefficients. The rows keep two more | ||
| 76 | * fractional bits than 16-bit intermediates could hold, and the columns | ||
| 77 | * are shifted by as little as the 32-bit sums of a 16-bit result allow */ | ||
| 78 | # if IN_IDCT_DEPTH != 32 | ||
| 79 | #error "The 16-bit iDCT needs 32-bit intermediates" | ||
| 80 | # endif | ||
| 81 | #define ROW_SHIFT 13 | ||
| 82 | #define COL_SHIFT 15 | ||
| 83 | #define DC_SHIFT 1 | ||
| 84 | # elif defined(EXTRA_SHIFT) | ||
| 85 | #define ROW_SHIFT 13 | ||
| 86 | #define COL_SHIFT 18 | ||
| 87 | #define DC_SHIFT 1 | ||
| 88 | # elif IN_IDCT_DEPTH == 32 | ||
| 89 | #define ROW_SHIFT 13 | ||
| 90 | #define COL_SHIFT 21 | ||
| 91 | #define DC_SHIFT 2 | ||
| 92 | # else | ||
| 93 | #define ROW_SHIFT 12 | ||
| 94 | #define COL_SHIFT 19 | ||
| 95 | #define DC_SHIFT 2 | ||
| 96 | # endif | ||
| 97 | |||
| 98 | # else | ||
| 99 | #define W1 45451 | ||
| 100 | #define W2 42813 | ||
| 101 | #define W3 38531 | ||
| 102 | #define W4 32767 | ||
| 103 | #define W5 25746 | ||
| 104 | #define W6 17734 | ||
| 105 | #define W7 9041 | ||
| 106 | |||
| 107 | #define ROW_SHIFT 16 | ||
| 108 | #define COL_SHIFT 17 | ||
| 109 | #define DC_SHIFT -1 | ||
| 110 | # endif | ||
| 111 | |||
| 112 | #define MUL(a, b) ((int)((SUINT)(a) * (b))) | ||
| 113 | #define MAC(a, b, c) ((a) += (SUINT)(b) * (c)) | ||
| 114 | |||
| 115 | #else | ||
| 116 | |||
| 117 | #error "Unsupported bitdepth" | ||
| 118 | |||
| 119 | #endif | ||
| 120 | |||
| 121 | #ifdef EXTRA_SHIFT | ||
| 122 | 17518080 | static inline void FUNC(idctRowCondDC_extrashift)(int16_t *row, int extra_shift) | |
| 123 | #else | ||
| 124 | 1502737472 | static inline void FUNC6(idctRowCondDC)(idctin *row, int extra_shift) | |
| 125 | #endif | ||
| 126 | { | ||
| 127 | SUINT a0, a1, a2, a3, b0, b1, b2, b3; | ||
| 128 | |||
| 129 | // TODO: Add DC-only support for int32_t input | ||
| 130 | #if IN_IDCT_DEPTH == 16 | ||
| 131 | #if HAVE_FAST_64BIT | ||
| 132 | #define ROW0_MASK (0xffffULL << 48 * HAVE_BIGENDIAN) | ||
| 133 |
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1520170176 | if (((AV_RN64A(row) & ~ROW0_MASK) | AV_RN64A(row+4)) == 0) { |
| 134 | uint64_t temp; | ||
| 135 |
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1107935740 | if (DC_SHIFT - extra_shift >= 0) { |
| 136 | 1081871760 | temp = (row[0] * (1 << (DC_SHIFT - extra_shift))) & 0xffff; | |
| 137 | } else { | ||
| 138 | 26063980 | temp = ((row[0] + (1<<(extra_shift - DC_SHIFT-1))) >> (extra_shift - DC_SHIFT)) & 0xffff; | |
| 139 | } | ||
| 140 | 1107935740 | temp += temp * (1 << 16); | |
| 141 | 1107935740 | temp += temp * ((uint64_t) 1 << 32); | |
| 142 | 1107935740 | AV_WN64A(row, temp); | |
| 143 | 1107935740 | AV_WN64A(row + 4, temp); | |
| 144 | 1107935740 | return; | |
| 145 | } | ||
| 146 | #else | ||
| 147 | if (!(AV_RN32A(row+2) | | ||
| 148 | AV_RN32A(row+4) | | ||
| 149 | AV_RN32A(row+6) | | ||
| 150 | row[1])) { | ||
| 151 | uint32_t temp; | ||
| 152 | if (DC_SHIFT - extra_shift >= 0) { | ||
| 153 | temp = (row[0] * (1 << (DC_SHIFT - extra_shift))) & 0xffff; | ||
| 154 | } else { | ||
| 155 | temp = ((row[0] + (1<<(extra_shift - DC_SHIFT-1))) >> (extra_shift - DC_SHIFT)) & 0xffff; | ||
| 156 | } | ||
| 157 | temp += temp * (1 << 16); | ||
| 158 | AV_WN32A(row, temp); | ||
| 159 | AV_WN32A(row+2, temp); | ||
| 160 | AV_WN32A(row+4, temp); | ||
| 161 | AV_WN32A(row+6, temp); | ||
| 162 | return; | ||
| 163 | } | ||
| 164 | #endif | ||
| 165 | #endif | ||
| 166 | |||
| 167 | 412319812 | a0 = ((SUINT)W4 * row[0]) + (1 << (ROW_SHIFT + extra_shift - 1)); | |
| 168 | 412319812 | a1 = a0; | |
| 169 | 412319812 | a2 = a0; | |
| 170 | 412319812 | a3 = a0; | |
| 171 | |||
| 172 | 412319812 | a0 += (SUINT)W2 * row[2]; | |
| 173 | 412319812 | a1 += (SUINT)W6 * row[2]; | |
| 174 | 412319812 | a2 -= (SUINT)W6 * row[2]; | |
| 175 | 412319812 | a3 -= (SUINT)W2 * row[2]; | |
| 176 | |||
| 177 | 412319812 | b0 = MUL(W1, row[1]); | |
| 178 | 412319812 | MAC(b0, W3, row[3]); | |
| 179 | 412319812 | b1 = MUL(W3, row[1]); | |
| 180 | 412319812 | MAC(b1, -W7, row[3]); | |
| 181 | 412319812 | b2 = MUL(W5, row[1]); | |
| 182 | 412319812 | MAC(b2, -W1, row[3]); | |
| 183 | 412319812 | b3 = MUL(W7, row[1]); | |
| 184 | 412319812 | MAC(b3, -W5, row[3]); | |
| 185 | |||
| 186 | #if IN_IDCT_DEPTH == 32 | ||
| 187 |
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85376 | if (AV_RN64A(row + 4) | AV_RN64A(row + 6)) { |
| 188 | #else | ||
| 189 |
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412234436 | if (AV_RN64A(row + 4)) { |
| 190 | #endif | ||
| 191 | 172070400 | a0 += (SUINT) W4*row[4] + (SUINT)W6*row[6]; | |
| 192 | 172070400 | a1 += (SUINT)- W4*row[4] - (SUINT)W2*row[6]; | |
| 193 | 172070400 | a2 += (SUINT)- W4*row[4] + (SUINT)W2*row[6]; | |
| 194 | 172070400 | a3 += (SUINT) W4*row[4] - (SUINT)W6*row[6]; | |
| 195 | |||
| 196 | 172070400 | MAC(b0, W5, row[5]); | |
| 197 | 172070400 | MAC(b0, W7, row[7]); | |
| 198 | |||
| 199 | 172070400 | MAC(b1, -W1, row[5]); | |
| 200 | 172070400 | MAC(b1, -W5, row[7]); | |
| 201 | |||
| 202 | 172070400 | MAC(b2, W7, row[5]); | |
| 203 | 172070400 | MAC(b2, W3, row[7]); | |
| 204 | |||
| 205 | 172070400 | MAC(b3, W3, row[5]); | |
| 206 | 172070400 | MAC(b3, -W1, row[7]); | |
| 207 | } | ||
| 208 | |||
| 209 | 412319812 | row[0] = (int)(a0 + b0) >> (ROW_SHIFT + extra_shift); | |
| 210 | 412319812 | row[7] = (int)(a0 - b0) >> (ROW_SHIFT + extra_shift); | |
| 211 | 412319812 | row[1] = (int)(a1 + b1) >> (ROW_SHIFT + extra_shift); | |
| 212 | 412319812 | row[6] = (int)(a1 - b1) >> (ROW_SHIFT + extra_shift); | |
| 213 | 412319812 | row[2] = (int)(a2 + b2) >> (ROW_SHIFT + extra_shift); | |
| 214 | 412319812 | row[5] = (int)(a2 - b2) >> (ROW_SHIFT + extra_shift); | |
| 215 | 412319812 | row[3] = (int)(a3 + b3) >> (ROW_SHIFT + extra_shift); | |
| 216 | 412319812 | row[4] = (int)(a3 - b3) >> (ROW_SHIFT + extra_shift); | |
| 217 | 85376 | } | |
| 218 | |||
| 219 | #define IDCT_COLS do { \ | ||
| 220 | a0 = (SUINT)W4 * (col[8*0] + ((1<<(COL_SHIFT-1))/W4)); \ | ||
| 221 | a1 = a0; \ | ||
| 222 | a2 = a0; \ | ||
| 223 | a3 = a0; \ | ||
| 224 | \ | ||
| 225 | a0 += (SUINT) W2*col[8*2]; \ | ||
| 226 | a1 += (SUINT) W6*col[8*2]; \ | ||
| 227 | a2 += (SUINT)-W6*col[8*2]; \ | ||
| 228 | a3 += (SUINT)-W2*col[8*2]; \ | ||
| 229 | \ | ||
| 230 | b0 = MUL(W1, col[8*1]); \ | ||
| 231 | b1 = MUL(W3, col[8*1]); \ | ||
| 232 | b2 = MUL(W5, col[8*1]); \ | ||
| 233 | b3 = MUL(W7, col[8*1]); \ | ||
| 234 | \ | ||
| 235 | MAC(b0, W3, col[8*3]); \ | ||
| 236 | MAC(b1, -W7, col[8*3]); \ | ||
| 237 | MAC(b2, -W1, col[8*3]); \ | ||
| 238 | MAC(b3, -W5, col[8*3]); \ | ||
| 239 | \ | ||
| 240 | if (col[8*4]) { \ | ||
| 241 | a0 += (SUINT) W4*col[8*4]; \ | ||
| 242 | a1 += (SUINT)-W4*col[8*4]; \ | ||
| 243 | a2 += (SUINT)-W4*col[8*4]; \ | ||
| 244 | a3 += (SUINT) W4*col[8*4]; \ | ||
| 245 | } \ | ||
| 246 | \ | ||
| 247 | if (col[8*5]) { \ | ||
| 248 | MAC(b0, W5, col[8*5]); \ | ||
| 249 | MAC(b1, -W1, col[8*5]); \ | ||
| 250 | MAC(b2, W7, col[8*5]); \ | ||
| 251 | MAC(b3, W3, col[8*5]); \ | ||
| 252 | } \ | ||
| 253 | \ | ||
| 254 | if (col[8*6]) { \ | ||
| 255 | a0 += (SUINT) W6*col[8*6]; \ | ||
| 256 | a1 += (SUINT)-W2*col[8*6]; \ | ||
| 257 | a2 += (SUINT) W2*col[8*6]; \ | ||
| 258 | a3 += (SUINT)-W6*col[8*6]; \ | ||
| 259 | } \ | ||
| 260 | \ | ||
| 261 | if (col[8*7]) { \ | ||
| 262 | MAC(b0, W7, col[8*7]); \ | ||
| 263 | MAC(b1, -W5, col[8*7]); \ | ||
| 264 | MAC(b2, W3, col[8*7]); \ | ||
| 265 | MAC(b3, -W1, col[8*7]); \ | ||
| 266 | } \ | ||
| 267 | } while (0) | ||
| 268 | |||
| 269 | #ifdef EXTRA_SHIFT | ||
| 270 | 17518080 | static inline void FUNC(idctSparseCol_extrashift)(int16_t *col) | |
| 271 | #else | ||
| 272 | 97764976 | static inline void FUNC6(idctSparseCol)(idctin *col) | |
| 273 | #endif | ||
| 274 | { | ||
| 275 | unsigned a0, a1, a2, a3, b0, b1, b2, b3; | ||
| 276 | |||
| 277 |
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115283056 | IDCT_COLS; |
| 278 | |||
| 279 | 115283056 | col[0 ] = ((int)(a0 + b0) >> COL_SHIFT); | |
| 280 | 115283056 | col[8 ] = ((int)(a1 + b1) >> COL_SHIFT); | |
| 281 | 115283056 | col[16] = ((int)(a2 + b2) >> COL_SHIFT); | |
| 282 | 115283056 | col[24] = ((int)(a3 + b3) >> COL_SHIFT); | |
| 283 | 115283056 | col[32] = ((int)(a3 - b3) >> COL_SHIFT); | |
| 284 | 115283056 | col[40] = ((int)(a2 - b2) >> COL_SHIFT); | |
| 285 | 115283056 | col[48] = ((int)(a1 - b1) >> COL_SHIFT); | |
| 286 | 115283056 | col[56] = ((int)(a0 - b0) >> COL_SHIFT); | |
| 287 | 115283056 | } | |
| 288 | |||
| 289 | #ifndef PRORES_ONLY | ||
| 290 | #ifndef EXTRA_SHIFT | ||
| 291 | 1122067120 | static inline void FUNC6(idctSparseColPut)(pixel *dest, ptrdiff_t line_size, | |
| 292 | idctin *col) | ||
| 293 | { | ||
| 294 | SUINT a0, a1, a2, a3, b0, b1, b2, b3; | ||
| 295 | |||
| 296 |
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1122067120 | IDCT_COLS; |
| 297 | |||
| 298 | 1122067120 | dest[0] = av_clip_pixel((int)(a0 + b0) >> COL_SHIFT); | |
| 299 | 1122067120 | dest += line_size; | |
| 300 | 1122067120 | dest[0] = av_clip_pixel((int)(a1 + b1) >> COL_SHIFT); | |
| 301 | 1122067120 | dest += line_size; | |
| 302 | 1122067120 | dest[0] = av_clip_pixel((int)(a2 + b2) >> COL_SHIFT); | |
| 303 | 1122067120 | dest += line_size; | |
| 304 | 1122067120 | dest[0] = av_clip_pixel((int)(a3 + b3) >> COL_SHIFT); | |
| 305 | 1122067120 | dest += line_size; | |
| 306 | 1122067120 | dest[0] = av_clip_pixel((int)(a3 - b3) >> COL_SHIFT); | |
| 307 | 1122067120 | dest += line_size; | |
| 308 | 1122067120 | dest[0] = av_clip_pixel((int)(a2 - b2) >> COL_SHIFT); | |
| 309 | 1122067120 | dest += line_size; | |
| 310 | 1122067120 | dest[0] = av_clip_pixel((int)(a1 - b1) >> COL_SHIFT); | |
| 311 | 1122067120 | dest += line_size; | |
| 312 | 1122067120 | dest[0] = av_clip_pixel((int)(a0 - b0) >> COL_SHIFT); | |
| 313 | 1122067120 | } | |
| 314 | |||
| 315 | 282440304 | static inline void FUNC6(idctSparseColAdd)(pixel *dest, ptrdiff_t line_size, | |
| 316 | idctin *col) | ||
| 317 | { | ||
| 318 | unsigned a0, a1, a2, a3, b0, b1, b2, b3; | ||
| 319 | |||
| 320 |
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282440304 | IDCT_COLS; |
| 321 | |||
| 322 | 282440304 | dest[0] = av_clip_pixel(dest[0] + ((int)(a0 + b0) >> COL_SHIFT)); | |
| 323 | 282440304 | dest += line_size; | |
| 324 | 282440304 | dest[0] = av_clip_pixel(dest[0] + ((int)(a1 + b1) >> COL_SHIFT)); | |
| 325 | 282440304 | dest += line_size; | |
| 326 | 282440304 | dest[0] = av_clip_pixel(dest[0] + ((int)(a2 + b2) >> COL_SHIFT)); | |
| 327 | 282440304 | dest += line_size; | |
| 328 | 282440304 | dest[0] = av_clip_pixel(dest[0] + ((int)(a3 + b3) >> COL_SHIFT)); | |
| 329 | 282440304 | dest += line_size; | |
| 330 | 282440304 | dest[0] = av_clip_pixel(dest[0] + ((int)(a3 - b3) >> COL_SHIFT)); | |
| 331 | 282440304 | dest += line_size; | |
| 332 | 282440304 | dest[0] = av_clip_pixel(dest[0] + ((int)(a2 - b2) >> COL_SHIFT)); | |
| 333 | 282440304 | dest += line_size; | |
| 334 | 282440304 | dest[0] = av_clip_pixel(dest[0] + ((int)(a1 - b1) >> COL_SHIFT)); | |
| 335 | 282440304 | dest += line_size; | |
| 336 | 282440304 | dest[0] = av_clip_pixel(dest[0] + ((int)(a0 - b0) >> COL_SHIFT)); | |
| 337 | 282440304 | } | |
| 338 | |||
| 339 | 140258390 | void FUNC6(ff_simple_idct_put)(uint8_t *dest_, ptrdiff_t line_size, int16_t *block_) | |
| 340 | { | ||
| 341 | 140258390 | idctin *block = (idctin *)block_; | |
| 342 | 140258390 | pixel *dest = (pixel *)dest_; | |
| 343 | int i; | ||
| 344 | |||
| 345 | 140258390 | line_size /= sizeof(pixel); | |
| 346 | |||
| 347 |
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1262325510 | for (i = 0; i < 8; i++) |
| 348 | 1122067120 | FUNC6(idctRowCondDC)(block + i*8, 0); | |
| 349 | |||
| 350 |
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1262325510 | for (i = 0; i < 8; i++) |
| 351 | 1122067120 | FUNC6(idctSparseColPut)(dest + i, line_size, block + i); | |
| 352 | 140258390 | } | |
| 353 | |||
| 354 | #if IN_IDCT_DEPTH == 16 | ||
| 355 | 35275082 | void FUNC6(ff_simple_idct_add)(uint8_t *dest_, ptrdiff_t line_size, int16_t *block) | |
| 356 | { | ||
| 357 | 35275082 | pixel *dest = (pixel *)dest_; | |
| 358 | int i; | ||
| 359 | |||
| 360 | 35275082 | line_size /= sizeof(pixel); | |
| 361 | |||
| 362 |
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317475738 | for (i = 0; i < 8; i++) |
| 363 | 282200656 | FUNC6(idctRowCondDC)(block + i*8, 0); | |
| 364 | |||
| 365 |
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317475738 | for (i = 0; i < 8; i++) |
| 366 | 282200656 | FUNC6(idctSparseColAdd)(dest + i, line_size, block + i); | |
| 367 | 35275082 | } | |
| 368 | |||
| 369 | 8169176 | void FUNC6(ff_simple_idct)(int16_t *block) | |
| 370 | { | ||
| 371 | int i; | ||
| 372 | |||
| 373 |
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73522584 | for (i = 0; i < 8; i++) |
| 374 | 65353408 | FUNC6(idctRowCondDC)(block + i*8, 0); | |
| 375 | |||
| 376 |
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73522584 | for (i = 0; i < 8; i++) |
| 377 | 65353408 | FUNC6(idctSparseCol)(block + i); | |
| 378 | 8169176 | } | |
| 379 | #endif | ||
| 380 | #endif | ||
| 381 | #endif /* PRORES_ONLY */ | ||
| 382 |