yuv_convert.cpp (22346B)
1 // Copyright (c) 2010 The Chromium Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 // This webpage shows layout of YV12 and other YUV formats 6 // http://www.fourcc.org/yuv.php 7 // The actual conversion is best described here 8 // http://en.wikipedia.org/wiki/YUV 9 // An article on optimizing YUV conversion using tables instead of multiplies 10 // http://lestourtereaux.free.fr/papers/data/yuvrgb.pdf 11 // 12 // YV12 is a full plane of Y and a half height, half width chroma planes 13 // YV16 is a full plane of Y and a full height, half width chroma planes 14 // YV24 is a full plane of Y and a full height, full width chroma planes 15 // Y8 is a full plane of Y and no chroma planes (i.e., monochrome) 16 // 17 // ARGB pixel format is output, which on little endian is stored as BGRA. 18 // The alpha is set to 255, allowing the application to use RGBA or RGB32. 19 20 #include "yuv_convert.h" 21 22 #include "libyuv.h" 23 #include "mozilla/IntegerRange.h" 24 #include "mozilla/SSE.h" 25 #include "mozilla/StaticPrefs_gfx.h" 26 #include "scale_yuv_argb.h" 27 // Header for low level row functions. 28 #include "yuv_row.h" 29 30 namespace mozilla { 31 32 namespace gfx { 33 34 // 16.16 fixed point arithmetic 35 const int kFractionBits = 16; 36 const int kFractionMax = 1 << kFractionBits; 37 const int kFractionMask = ((1 << kFractionBits) - 1); 38 39 // clang-format off 40 41 nsresult ToNSResult(int aLibyuvResult) { 42 // Docs for libyuv::ConvertToI420 say: 43 // Returns 0 for successful; -1 for invalid parameter. Non-zero for failure. 44 switch (aLibyuvResult) { 45 case 0: 46 return NS_OK; 47 case -1: 48 return NS_ERROR_INVALID_ARG; 49 default: 50 return NS_ERROR_FAILURE; 51 } 52 } 53 54 libyuv::FourCC FourCCFromYUVType(YUVType aYUVType) { 55 switch (aYUVType) { 56 case YV24: return libyuv::FOURCC_I444; 57 case YV16: return libyuv::FOURCC_I422; 58 case YV12: return libyuv::FOURCC_I420; 59 case Y8: return libyuv::FOURCC_I400; 60 default: return libyuv::FOURCC_ANY; 61 } 62 } 63 64 int GBRPlanarToARGB(const uint8_t* src_y, int y_pitch, 65 const uint8_t* src_u, int u_pitch, 66 const uint8_t* src_v, int v_pitch, 67 uint8_t* rgb_buf, int rgb_pitch, 68 int pic_width, int pic_height) { 69 // libyuv has no native conversion function for this 70 // fixme: replace with something less awful 71 for (const auto row : IntegerRange(pic_height)) { 72 for (const auto col : IntegerRange(pic_width)) { 73 rgb_buf[rgb_pitch * row + col * 4 + 0] = src_u[u_pitch * row + col]; 74 rgb_buf[rgb_pitch * row + col * 4 + 1] = src_y[y_pitch * row + col]; 75 rgb_buf[rgb_pitch * row + col * 4 + 2] = src_v[v_pitch * row + col]; 76 rgb_buf[rgb_pitch * row + col * 4 + 3] = 255; 77 } 78 } 79 return 0; 80 } 81 82 // Convert a frame of YUV to 32 bit ARGB or ABGR. 83 nsresult 84 ConvertYCbCrToRGB32(const uint8_t* y_buf, 85 const uint8_t* u_buf, 86 const uint8_t* v_buf, 87 uint8_t* rgb_buf, 88 int pic_x, 89 int pic_y, 90 int pic_width, 91 int pic_height, 92 int y_pitch, 93 int uv_pitch, 94 int rgb_pitch, 95 YUVType yuv_type, 96 YUVColorSpace yuv_color_space, 97 ColorRange color_range, 98 RGB32Type rgb32_type) { 99 // Deprecated function's conversion is accurate. 100 // libyuv converion is a bit inaccurate to get performance. It dynamically 101 // calculates RGB from YUV to use simd. In it, signed byte is used for 102 // conversion's coefficient, but it requests 129. libyuv cut 129 to 127. And 103 // only 6 bits are used for a decimal part during the dynamic calculation. 104 // 105 // The function is still fast on some old intel chips. 106 // See Bug 1256475. 107 bool use_deprecated = StaticPrefs::gfx_ycbcr_accurate_conversion() || 108 (supports_mmx() && supports_sse() && !supports_sse3() && 109 yuv_color_space == YUVColorSpace::BT601 && 110 color_range == ColorRange::LIMITED); 111 // The deprecated function only support BT601. 112 // See Bug 1210357. 113 if (yuv_color_space != YUVColorSpace::BT601) { 114 use_deprecated = false; 115 } 116 if (use_deprecated) { 117 return ConvertYCbCrToRGB32_deprecated( 118 y_buf, u_buf, v_buf, rgb_buf, pic_x, pic_y, pic_width, pic_height, 119 y_pitch, uv_pitch, rgb_pitch, yuv_type, rgb32_type); 120 } 121 122 decltype(libyuv::I420ToARGBMatrix)* fConvertYUVToARGB = nullptr; 123 const uint8_t* src_y = nullptr; 124 const uint8_t* src_u = nullptr; 125 const uint8_t* src_v = nullptr; 126 const libyuv::YuvConstants* yuv_constant = nullptr; 127 bool swap_uv = rgb32_type == RGB32Type::ABGR; 128 129 switch (yuv_color_space) { 130 case YUVColorSpace::BT2020: 131 yuv_constant = color_range == ColorRange::LIMITED 132 ? swap_uv? &libyuv::kYvu2020Constants : &libyuv::kYuv2020Constants 133 : swap_uv? &libyuv::kYvuV2020Constants : &libyuv::kYuvV2020Constants; 134 break; 135 case YUVColorSpace::BT709: 136 yuv_constant = color_range == ColorRange::LIMITED 137 ? swap_uv? &libyuv::kYvuH709Constants : &libyuv::kYuvH709Constants 138 : swap_uv? &libyuv::kYvuF709Constants : &libyuv::kYuvF709Constants; 139 break; 140 case YUVColorSpace::Identity: 141 if (yuv_type == YV24) { 142 break; 143 } 144 NS_WARNING("Identity (aka RGB) with chroma subsampling is unsupported"); 145 return NS_ERROR_NOT_IMPLEMENTED; 146 // TODO: Consider using BT601 for unsupported input? 147 default: 148 MOZ_FALLTHROUGH_ASSERT("Unsupported YUVColorSpace"); 149 case YUVColorSpace::BT601: 150 yuv_constant = color_range == ColorRange::LIMITED 151 ? swap_uv? &libyuv::kYvuI601Constants : &libyuv::kYuvI601Constants 152 : swap_uv? &libyuv::kYvuJPEGConstants : &libyuv::kYuvJPEGConstants; 153 break; 154 } 155 156 switch (yuv_type) { 157 case YV24: { 158 src_y = y_buf + y_pitch * pic_y + pic_x; 159 src_u = u_buf + uv_pitch * pic_y + pic_x; 160 src_v = v_buf + uv_pitch * pic_y + pic_x; 161 162 if (yuv_color_space == YUVColorSpace::Identity) { 163 const uint8_t* u_channel = swap_uv? src_v : src_u; 164 const uint8_t* v_channel = swap_uv? src_u : src_v; 165 // Special case for RGB image 166 return ToNSResult(GBRPlanarToARGB(src_y, y_pitch, u_channel, uv_pitch, v_channel, 167 uv_pitch, rgb_buf, rgb_pitch, pic_width, pic_height)); 168 } 169 170 fConvertYUVToARGB = libyuv::I444ToARGBMatrix; 171 break; 172 } 173 case YV16: { 174 src_y = y_buf + y_pitch * pic_y + pic_x; 175 src_u = u_buf + uv_pitch * pic_y + pic_x / 2; 176 src_v = v_buf + uv_pitch * pic_y + pic_x / 2; 177 178 fConvertYUVToARGB = libyuv::I422ToARGBMatrix; 179 break; 180 } 181 case YV12: { 182 src_y = y_buf + y_pitch * pic_y + pic_x; 183 src_u = u_buf + (uv_pitch * pic_y + pic_x) / 2; 184 src_v = v_buf + (uv_pitch * pic_y + pic_x) / 2; 185 186 fConvertYUVToARGB = libyuv::I420ToARGBMatrix; 187 break; 188 } 189 case Y8: { 190 src_y = y_buf + y_pitch * pic_y + pic_x; 191 MOZ_ASSERT(u_buf == nullptr); 192 MOZ_ASSERT(v_buf == nullptr); 193 194 if (color_range == ColorRange::LIMITED) { 195 return ToNSResult(libyuv::I400ToARGB(src_y, y_pitch, rgb_buf, rgb_pitch, 196 pic_width, pic_height)); 197 } 198 return ToNSResult(libyuv::J400ToARGB(src_y, y_pitch, rgb_buf, rgb_pitch, 199 pic_width, pic_height)); 200 } 201 default: 202 MOZ_ASSERT_UNREACHABLE("Unsupported YUV type"); 203 return NS_ERROR_NOT_IMPLEMENTED; 204 } 205 206 const uint8_t* u_channel = swap_uv? src_v : src_u; 207 const uint8_t* v_channel = swap_uv? src_u : src_v; 208 return ToNSResult(fConvertYUVToARGB(src_y, y_pitch, u_channel, uv_pitch, 209 v_channel, uv_pitch, rgb_buf, rgb_pitch, 210 yuv_constant, pic_width, pic_height)); 211 } 212 213 // Convert a frame of YUV to 32 bit ARGB or ABGR. 214 nsresult 215 ConvertYCbCrToRGB32_deprecated(const uint8_t* y_buf, 216 const uint8_t* u_buf, 217 const uint8_t* v_buf, 218 uint8_t* rgb_buf, 219 int pic_x, 220 int pic_y, 221 int pic_width, 222 int pic_height, 223 int y_pitch, 224 int uv_pitch, 225 int rgb_pitch, 226 YUVType yuv_type, 227 RGB32Type rgb32_type) { 228 unsigned int y_shift = yuv_type == YV12 ? 1 : 0; 229 unsigned int x_shift = yuv_type == YV24 ? 0 : 1; 230 // Test for SSE because the optimized code uses movntq, which is not part of MMX. 231 bool has_sse = supports_mmx() && supports_sse(); 232 // There is no optimized YV24 SSE routine so we check for this and 233 // fall back to the C code. 234 has_sse &= yuv_type != YV24; 235 bool odd_pic_x = yuv_type != YV24 && pic_x % 2 != 0; 236 int x_width = odd_pic_x ? pic_width - 1 : pic_width; 237 bool swap_uv = rgb32_type == RGB32Type::ABGR; 238 const uint8_t* u_channel = swap_uv? v_buf : u_buf; 239 const uint8_t* v_channel = swap_uv? u_buf : v_buf; 240 241 for (int y = pic_y; y < pic_height + pic_y; ++y) { 242 uint8_t* rgb_row = rgb_buf + (y - pic_y) * rgb_pitch; 243 const uint8_t* y_ptr = y_buf + y * y_pitch + pic_x; 244 const uint8_t* u_ptr = u_channel + (y >> y_shift) * uv_pitch + (pic_x >> x_shift); 245 const uint8_t* v_ptr = v_channel + (y >> y_shift) * uv_pitch + (pic_x >> x_shift); 246 247 if (odd_pic_x) { 248 // Handle the single odd pixel manually and use the 249 // fast routines for the remaining. 250 FastConvertYUVToRGB32Row_C(y_ptr++, 251 u_ptr++, 252 v_ptr++, 253 rgb_row, 254 1, 255 x_shift); 256 rgb_row += 4; 257 } 258 259 if (has_sse) { 260 FastConvertYUVToRGB32Row(y_ptr, 261 u_ptr, 262 v_ptr, 263 rgb_row, 264 x_width); 265 } 266 else { 267 FastConvertYUVToRGB32Row_C(y_ptr, 268 u_ptr, 269 v_ptr, 270 rgb_row, 271 x_width, 272 x_shift); 273 } 274 } 275 276 // MMX used for FastConvertYUVToRGB32Row requires emms instruction. 277 if (has_sse) 278 EMMS(); 279 280 return NS_OK; 281 } 282 283 // C version does 8 at a time to mimic MMX code 284 static void FilterRows_C(uint8_t* ybuf, const uint8_t* y0_ptr, const uint8_t* y1_ptr, 285 int source_width, int source_y_fraction) { 286 int y1_fraction = source_y_fraction; 287 int y0_fraction = 256 - y1_fraction; 288 uint8_t* end = ybuf + source_width; 289 do { 290 ybuf[0] = (y0_ptr[0] * y0_fraction + y1_ptr[0] * y1_fraction) >> 8; 291 ybuf[1] = (y0_ptr[1] * y0_fraction + y1_ptr[1] * y1_fraction) >> 8; 292 ybuf[2] = (y0_ptr[2] * y0_fraction + y1_ptr[2] * y1_fraction) >> 8; 293 ybuf[3] = (y0_ptr[3] * y0_fraction + y1_ptr[3] * y1_fraction) >> 8; 294 ybuf[4] = (y0_ptr[4] * y0_fraction + y1_ptr[4] * y1_fraction) >> 8; 295 ybuf[5] = (y0_ptr[5] * y0_fraction + y1_ptr[5] * y1_fraction) >> 8; 296 ybuf[6] = (y0_ptr[6] * y0_fraction + y1_ptr[6] * y1_fraction) >> 8; 297 ybuf[7] = (y0_ptr[7] * y0_fraction + y1_ptr[7] * y1_fraction) >> 8; 298 y0_ptr += 8; 299 y1_ptr += 8; 300 ybuf += 8; 301 } while (ybuf < end); 302 } 303 304 #ifdef MOZILLA_MAY_SUPPORT_MMX 305 void FilterRows_MMX(uint8_t* ybuf, const uint8_t* y0_ptr, const uint8_t* y1_ptr, 306 int source_width, int source_y_fraction); 307 #endif 308 309 #ifdef MOZILLA_MAY_SUPPORT_SSE2 310 void FilterRows_SSE2(uint8_t* ybuf, const uint8_t* y0_ptr, const uint8_t* y1_ptr, 311 int source_width, int source_y_fraction); 312 #endif 313 314 static inline void FilterRows(uint8_t* ybuf, const uint8_t* y0_ptr, 315 const uint8_t* y1_ptr, int source_width, 316 int source_y_fraction) { 317 #ifdef MOZILLA_MAY_SUPPORT_SSE2 318 if (mozilla::supports_sse2()) { 319 FilterRows_SSE2(ybuf, y0_ptr, y1_ptr, source_width, source_y_fraction); 320 return; 321 } 322 #endif 323 324 #ifdef MOZILLA_MAY_SUPPORT_MMX 325 if (mozilla::supports_mmx()) { 326 FilterRows_MMX(ybuf, y0_ptr, y1_ptr, source_width, source_y_fraction); 327 return; 328 } 329 #endif 330 331 FilterRows_C(ybuf, y0_ptr, y1_ptr, source_width, source_y_fraction); 332 } 333 334 335 // Scale a frame of YUV to 32 bit ARGB. 336 nsresult 337 ScaleYCbCrToRGB32(const uint8_t* y_buf, 338 const uint8_t* u_buf, 339 const uint8_t* v_buf, 340 uint8_t* rgb_buf, 341 int source_width, 342 int source_height, 343 int width, 344 int height, 345 int y_pitch, 346 int uv_pitch, 347 int rgb_pitch, 348 YUVType yuv_type, 349 YUVColorSpace yuv_color_space, 350 ScaleFilter filter) { 351 bool use_deprecated = 352 StaticPrefs::gfx_ycbcr_accurate_conversion() || 353 #if defined(XP_WIN) && defined(_M_X64) 354 // libyuv does not support SIMD scaling on win 64bit. See Bug 1295927. 355 supports_sse3() || 356 #endif 357 (supports_mmx() && supports_sse() && !supports_sse3()); 358 // The deprecated function only support BT601. 359 // See Bug 1210357. 360 if (yuv_color_space != YUVColorSpace::BT601) { 361 use_deprecated = false; 362 } 363 if (use_deprecated) { 364 return ScaleYCbCrToRGB32_deprecated( 365 y_buf, u_buf, v_buf, rgb_buf, source_width, source_height, width, 366 height, y_pitch, uv_pitch, rgb_pitch, yuv_type, ROTATE_0, filter); 367 } 368 369 return ToNSResult(libyuv::YUVToARGBScale( 370 y_buf, y_pitch, u_buf, uv_pitch, v_buf, uv_pitch, 371 FourCCFromYUVType(yuv_type), yuv_color_space, source_width, source_height, 372 rgb_buf, rgb_pitch, width, height, libyuv::kFilterBilinear)); 373 } 374 375 // Scale a frame of YUV to 32 bit ARGB. 376 nsresult 377 ScaleYCbCrToRGB32_deprecated(const uint8_t* y_buf, 378 const uint8_t* u_buf, 379 const uint8_t* v_buf, 380 uint8_t* rgb_buf, 381 int source_width, 382 int source_height, 383 int width, 384 int height, 385 int y_pitch, 386 int uv_pitch, 387 int rgb_pitch, 388 YUVType yuv_type, 389 Rotate view_rotate, 390 ScaleFilter filter) { 391 bool has_mmx = supports_mmx(); 392 393 // 4096 allows 3 buffers to fit in 12k. 394 // Helps performance on CPU with 16K L1 cache. 395 // Large enough for 3830x2160 and 30" displays which are 2560x1600. 396 const int kFilterBufferSize = 4096; 397 // Disable filtering if the screen is too big (to avoid buffer overflows). 398 // This should never happen to regular users: they don't have monitors 399 // wider than 4096 pixels. 400 // TODO(fbarchard): Allow rotated videos to filter. 401 if (source_width > kFilterBufferSize || view_rotate) 402 filter = FILTER_NONE; 403 404 unsigned int y_shift = yuv_type == YV12 ? 1 : 0; 405 // Diagram showing origin and direction of source sampling. 406 // ->0 4<- 407 // 7 3 408 // 409 // 6 5 410 // ->1 2<- 411 // Rotations that start at right side of image. 412 if ((view_rotate == ROTATE_180) || 413 (view_rotate == ROTATE_270) || 414 (view_rotate == MIRROR_ROTATE_0) || 415 (view_rotate == MIRROR_ROTATE_90)) { 416 y_buf += source_width - 1; 417 u_buf += source_width / 2 - 1; 418 v_buf += source_width / 2 - 1; 419 source_width = -source_width; 420 } 421 // Rotations that start at bottom of image. 422 if ((view_rotate == ROTATE_90) || 423 (view_rotate == ROTATE_180) || 424 (view_rotate == MIRROR_ROTATE_90) || 425 (view_rotate == MIRROR_ROTATE_180)) { 426 y_buf += (source_height - 1) * y_pitch; 427 u_buf += ((source_height >> y_shift) - 1) * uv_pitch; 428 v_buf += ((source_height >> y_shift) - 1) * uv_pitch; 429 source_height = -source_height; 430 } 431 432 // Handle zero sized destination. 433 if (width == 0 || height == 0) 434 return NS_ERROR_INVALID_ARG; 435 int source_dx = source_width * kFractionMax / width; 436 int source_dy = source_height * kFractionMax / height; 437 int source_dx_uv = source_dx; 438 439 if ((view_rotate == ROTATE_90) || 440 (view_rotate == ROTATE_270)) { 441 int tmp = height; 442 height = width; 443 width = tmp; 444 tmp = source_height; 445 source_height = source_width; 446 source_width = tmp; 447 int original_dx = source_dx; 448 int original_dy = source_dy; 449 source_dx = ((original_dy >> kFractionBits) * y_pitch) << kFractionBits; 450 source_dx_uv = ((original_dy >> kFractionBits) * uv_pitch) << kFractionBits; 451 source_dy = original_dx; 452 if (view_rotate == ROTATE_90) { 453 y_pitch = -1; 454 uv_pitch = -1; 455 source_height = -source_height; 456 } else { 457 y_pitch = 1; 458 uv_pitch = 1; 459 } 460 } 461 462 // Need padding because FilterRows() will write 1 to 16 extra pixels 463 // after the end for SSE2 version. 464 uint8_t yuvbuf[16 + kFilterBufferSize * 3 + 16]; 465 uint8_t* ybuf = 466 reinterpret_cast<uint8_t*>(reinterpret_cast<uintptr_t>(yuvbuf + 15) & ~15); 467 uint8_t* ubuf = ybuf + kFilterBufferSize; 468 uint8_t* vbuf = ubuf + kFilterBufferSize; 469 // TODO(fbarchard): Fixed point math is off by 1 on negatives. 470 int yscale_fixed = (source_height << kFractionBits) / height; 471 472 // TODO(fbarchard): Split this into separate function for better efficiency. 473 for (int y = 0; y < height; ++y) { 474 uint8_t* dest_pixel = rgb_buf + y * rgb_pitch; 475 int source_y_subpixel = (y * yscale_fixed); 476 if (yscale_fixed >= (kFractionMax * 2)) { 477 source_y_subpixel += kFractionMax / 2; // For 1/2 or less, center filter. 478 } 479 int source_y = source_y_subpixel >> kFractionBits; 480 481 const uint8_t* y0_ptr = y_buf + source_y * y_pitch; 482 const uint8_t* y1_ptr = y0_ptr + y_pitch; 483 484 const uint8_t* u0_ptr = u_buf + (source_y >> y_shift) * uv_pitch; 485 const uint8_t* u1_ptr = u0_ptr + uv_pitch; 486 const uint8_t* v0_ptr = v_buf + (source_y >> y_shift) * uv_pitch; 487 const uint8_t* v1_ptr = v0_ptr + uv_pitch; 488 489 // vertical scaler uses 16.8 fixed point 490 int source_y_fraction = (source_y_subpixel & kFractionMask) >> 8; 491 int source_uv_fraction = 492 ((source_y_subpixel >> y_shift) & kFractionMask) >> 8; 493 494 const uint8_t* y_ptr = y0_ptr; 495 const uint8_t* u_ptr = u0_ptr; 496 const uint8_t* v_ptr = v0_ptr; 497 // Apply vertical filtering if necessary. 498 // TODO(fbarchard): Remove memcpy when not necessary. 499 if (filter & mozilla::gfx::FILTER_BILINEAR_V) { 500 if (yscale_fixed != kFractionMax && 501 source_y_fraction && ((source_y + 1) < source_height)) { 502 FilterRows(ybuf, y0_ptr, y1_ptr, source_width, source_y_fraction); 503 } else { 504 memcpy(ybuf, y0_ptr, source_width); 505 } 506 y_ptr = ybuf; 507 ybuf[source_width] = ybuf[source_width-1]; 508 int uv_source_width = (source_width + 1) / 2; 509 if (yscale_fixed != kFractionMax && 510 source_uv_fraction && 511 (((source_y >> y_shift) + 1) < (source_height >> y_shift))) { 512 FilterRows(ubuf, u0_ptr, u1_ptr, uv_source_width, source_uv_fraction); 513 FilterRows(vbuf, v0_ptr, v1_ptr, uv_source_width, source_uv_fraction); 514 } else { 515 memcpy(ubuf, u0_ptr, uv_source_width); 516 memcpy(vbuf, v0_ptr, uv_source_width); 517 } 518 u_ptr = ubuf; 519 v_ptr = vbuf; 520 ubuf[uv_source_width] = ubuf[uv_source_width - 1]; 521 vbuf[uv_source_width] = vbuf[uv_source_width - 1]; 522 } 523 if (source_dx == kFractionMax) { // Not scaled 524 FastConvertYUVToRGB32Row(y_ptr, u_ptr, v_ptr, 525 dest_pixel, width); 526 } else if (filter & FILTER_BILINEAR_H) { 527 LinearScaleYUVToRGB32Row(y_ptr, u_ptr, v_ptr, 528 dest_pixel, width, source_dx); 529 } else { 530 // Specialized scalers and rotation. 531 #if defined(MOZILLA_MAY_SUPPORT_SSE) && defined(_MSC_VER) && defined(_M_IX86) && !defined(__clang__) 532 if(mozilla::supports_sse()) { 533 if (width == (source_width * 2)) { 534 DoubleYUVToRGB32Row_SSE(y_ptr, u_ptr, v_ptr, 535 dest_pixel, width); 536 } else if ((source_dx & kFractionMask) == 0) { 537 // Scaling by integer scale factor. ie half. 538 ConvertYUVToRGB32Row_SSE(y_ptr, u_ptr, v_ptr, 539 dest_pixel, width, 540 source_dx >> kFractionBits); 541 } else if (source_dx_uv == source_dx) { // Not rotated. 542 ScaleYUVToRGB32Row(y_ptr, u_ptr, v_ptr, 543 dest_pixel, width, source_dx); 544 } else { 545 RotateConvertYUVToRGB32Row_SSE(y_ptr, u_ptr, v_ptr, 546 dest_pixel, width, 547 source_dx >> kFractionBits, 548 source_dx_uv >> kFractionBits); 549 } 550 } 551 else { 552 ScaleYUVToRGB32Row_C(y_ptr, u_ptr, v_ptr, 553 dest_pixel, width, source_dx); 554 } 555 #else 556 (void)source_dx_uv; 557 ScaleYUVToRGB32Row(y_ptr, u_ptr, v_ptr, 558 dest_pixel, width, source_dx); 559 #endif 560 } 561 } 562 // MMX used for FastConvertYUVToRGB32Row and FilterRows requires emms. 563 if (has_mmx) 564 EMMS(); 565 566 return NS_OK; 567 } 568 569 nsresult 570 ConvertI420AlphaToARGB32(const uint8_t* y_buf, 571 const uint8_t* u_buf, 572 const uint8_t* v_buf, 573 const uint8_t* a_buf, 574 uint8_t* argb_buf, 575 int pic_width, 576 int pic_height, 577 int ya_pitch, 578 int uv_pitch, 579 int argb_pitch) { 580 581 // The downstream graphics stack expects an attenuated input, hence why the 582 // attenuation parameter is set. 583 return ToNSResult(libyuv::I420AlphaToARGB( 584 y_buf, ya_pitch, u_buf, uv_pitch, v_buf, uv_pitch, a_buf, ya_pitch, 585 argb_buf, argb_pitch, pic_width, pic_height, 1)); 586 } 587 588 } // namespace gfx 589 } // namespace mozilla