Line data Source code
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 : //
16 : // ARGB pixel format is output, which on little endian is stored as BGRA.
17 : // The alpha is set to 255, allowing the application to use RGBA or RGB32.
18 :
19 : #include "yuv_convert.h"
20 :
21 : #include "gfxPrefs.h"
22 : #include "libyuv.h"
23 : #include "scale_yuv_argb.h"
24 : // Header for low level row functions.
25 : #include "yuv_row.h"
26 : #include "mozilla/SSE.h"
27 :
28 : namespace mozilla {
29 :
30 : namespace gfx {
31 :
32 : // 16.16 fixed point arithmetic
33 : const int kFractionBits = 16;
34 : const int kFractionMax = 1 << kFractionBits;
35 : const int kFractionMask = ((1 << kFractionBits) - 1);
36 :
37 0 : YUVType TypeFromSize(int ywidth,
38 : int yheight,
39 : int cbcrwidth,
40 : int cbcrheight)
41 : {
42 0 : if (ywidth == cbcrwidth && yheight == cbcrheight) {
43 0 : return YV24;
44 : }
45 0 : else if ((ywidth + 1) / 2 == cbcrwidth && yheight == cbcrheight) {
46 0 : return YV16;
47 : }
48 : else {
49 0 : return YV12;
50 : }
51 : }
52 :
53 0 : libyuv::FourCC FourCCFromYUVType(YUVType aYUVType)
54 : {
55 0 : if (aYUVType == YV24) {
56 0 : return libyuv::FOURCC_I444;
57 0 : } else if (aYUVType == YV16) {
58 0 : return libyuv::FOURCC_I422;
59 0 : } else if (aYUVType == YV12) {
60 0 : return libyuv::FOURCC_I420;
61 : } else {
62 0 : return libyuv::FOURCC_ANY;
63 : }
64 : }
65 :
66 : // Convert a frame of YUV to 32 bit ARGB.
67 0 : void ConvertYCbCrToRGB32(const uint8* y_buf,
68 : const uint8* u_buf,
69 : const uint8* v_buf,
70 : uint8* rgb_buf,
71 : int pic_x,
72 : int pic_y,
73 : int pic_width,
74 : int pic_height,
75 : int y_pitch,
76 : int uv_pitch,
77 : int rgb_pitch,
78 : YUVType yuv_type,
79 : YUVColorSpace yuv_color_space) {
80 :
81 :
82 : // Deprecated function's conversion is accurate.
83 : // libyuv converion is a bit inaccurate to get performance. It dynamically
84 : // calculates RGB from YUV to use simd. In it, signed byte is used for conversion's
85 : // coefficient, but it requests 129. libyuv cut 129 to 127. And only 6 bits are
86 : // used for a decimal part during the dynamic calculation.
87 : //
88 : // The function is still fast on some old intel chips.
89 : // See Bug 1256475.
90 0 : bool use_deprecated = gfxPrefs::YCbCrAccurateConversion() ||
91 0 : (supports_mmx() && supports_sse() && !supports_sse3() &&
92 0 : yuv_color_space == YUVColorSpace::BT601);
93 : // The deprecated function only support BT601.
94 : // See Bug 1210357.
95 0 : if (yuv_color_space != YUVColorSpace::BT601) {
96 0 : use_deprecated = false;
97 : }
98 0 : if (use_deprecated) {
99 : ConvertYCbCrToRGB32_deprecated(y_buf, u_buf, v_buf, rgb_buf,
100 : pic_x, pic_y, pic_width, pic_height,
101 0 : y_pitch, uv_pitch, rgb_pitch, yuv_type);
102 0 : return;
103 : }
104 :
105 0 : if (yuv_type == YV24) {
106 0 : const uint8* src_y = y_buf + y_pitch * pic_y + pic_x;
107 0 : const uint8* src_u = u_buf + uv_pitch * pic_y + pic_x;
108 0 : const uint8* src_v = v_buf + uv_pitch * pic_y + pic_x;
109 0 : if (yuv_color_space == mozilla::YUVColorSpace::BT709) {
110 0 : DebugOnly<int> err = libyuv::H444ToARGB(src_y, y_pitch,
111 : src_u, uv_pitch,
112 : src_v, uv_pitch,
113 : rgb_buf, rgb_pitch,
114 0 : pic_width, pic_height);
115 0 : MOZ_ASSERT(!err);
116 : } else {
117 0 : DebugOnly<int> err = libyuv::I444ToARGB(src_y, y_pitch,
118 : src_u, uv_pitch,
119 : src_v, uv_pitch,
120 : rgb_buf, rgb_pitch,
121 0 : pic_width, pic_height);
122 0 : MOZ_ASSERT(!err);
123 : }
124 0 : } else if (yuv_type == YV16) {
125 0 : const uint8* src_y = y_buf + y_pitch * pic_y + pic_x;
126 0 : const uint8* src_u = u_buf + uv_pitch * pic_y + pic_x / 2;
127 0 : const uint8* src_v = v_buf + uv_pitch * pic_y + pic_x / 2;
128 0 : if (yuv_color_space == mozilla::YUVColorSpace::BT709) {
129 0 : DebugOnly<int> err = libyuv::H422ToARGB(src_y, y_pitch,
130 : src_u, uv_pitch,
131 : src_v, uv_pitch,
132 : rgb_buf, rgb_pitch,
133 0 : pic_width, pic_height);
134 0 : MOZ_ASSERT(!err);
135 : } else {
136 0 : DebugOnly<int> err = libyuv::I422ToARGB(src_y, y_pitch,
137 : src_u, uv_pitch,
138 : src_v, uv_pitch,
139 : rgb_buf, rgb_pitch,
140 0 : pic_width, pic_height);
141 0 : MOZ_ASSERT(!err);
142 : }
143 : } else {
144 0 : MOZ_ASSERT(yuv_type == YV12);
145 0 : const uint8* src_y = y_buf + y_pitch * pic_y + pic_x;
146 0 : const uint8* src_u = u_buf + (uv_pitch * pic_y + pic_x) / 2;
147 0 : const uint8* src_v = v_buf + (uv_pitch * pic_y + pic_x) / 2;
148 0 : if (yuv_color_space == mozilla::YUVColorSpace::BT709) {
149 0 : DebugOnly<int> err = libyuv::H420ToARGB(src_y, y_pitch,
150 : src_u, uv_pitch,
151 : src_v, uv_pitch,
152 : rgb_buf, rgb_pitch,
153 0 : pic_width, pic_height);
154 0 : MOZ_ASSERT(!err);
155 : } else {
156 0 : DebugOnly<int> err = libyuv::I420ToARGB(src_y, y_pitch,
157 : src_u, uv_pitch,
158 : src_v, uv_pitch,
159 : rgb_buf, rgb_pitch,
160 0 : pic_width, pic_height);
161 0 : MOZ_ASSERT(!err);
162 : }
163 : }
164 : }
165 :
166 : // Convert a frame of YUV to 32 bit ARGB.
167 0 : void ConvertYCbCrToRGB32_deprecated(const uint8* y_buf,
168 : const uint8* u_buf,
169 : const uint8* v_buf,
170 : uint8* rgb_buf,
171 : int pic_x,
172 : int pic_y,
173 : int pic_width,
174 : int pic_height,
175 : int y_pitch,
176 : int uv_pitch,
177 : int rgb_pitch,
178 : YUVType yuv_type) {
179 0 : unsigned int y_shift = yuv_type == YV12 ? 1 : 0;
180 0 : unsigned int x_shift = yuv_type == YV24 ? 0 : 1;
181 : // Test for SSE because the optimized code uses movntq, which is not part of MMX.
182 0 : bool has_sse = supports_mmx() && supports_sse();
183 : // There is no optimized YV24 SSE routine so we check for this and
184 : // fall back to the C code.
185 0 : has_sse &= yuv_type != YV24;
186 0 : bool odd_pic_x = yuv_type != YV24 && pic_x % 2 != 0;
187 0 : int x_width = odd_pic_x ? pic_width - 1 : pic_width;
188 :
189 0 : for (int y = pic_y; y < pic_height + pic_y; ++y) {
190 0 : uint8* rgb_row = rgb_buf + (y - pic_y) * rgb_pitch;
191 0 : const uint8* y_ptr = y_buf + y * y_pitch + pic_x;
192 0 : const uint8* u_ptr = u_buf + (y >> y_shift) * uv_pitch + (pic_x >> x_shift);
193 0 : const uint8* v_ptr = v_buf + (y >> y_shift) * uv_pitch + (pic_x >> x_shift);
194 :
195 0 : if (odd_pic_x) {
196 : // Handle the single odd pixel manually and use the
197 : // fast routines for the remaining.
198 0 : FastConvertYUVToRGB32Row_C(y_ptr++,
199 : u_ptr++,
200 : v_ptr++,
201 : rgb_row,
202 : 1,
203 0 : x_shift);
204 0 : rgb_row += 4;
205 : }
206 :
207 0 : if (has_sse) {
208 : FastConvertYUVToRGB32Row(y_ptr,
209 : u_ptr,
210 : v_ptr,
211 : rgb_row,
212 0 : x_width);
213 : }
214 : else {
215 : FastConvertYUVToRGB32Row_C(y_ptr,
216 : u_ptr,
217 : v_ptr,
218 : rgb_row,
219 : x_width,
220 0 : x_shift);
221 : }
222 : }
223 :
224 : // MMX used for FastConvertYUVToRGB32Row requires emms instruction.
225 : if (has_sse)
226 : EMMS();
227 0 : }
228 :
229 : // C version does 8 at a time to mimic MMX code
230 0 : static void FilterRows_C(uint8* ybuf, const uint8* y0_ptr, const uint8* y1_ptr,
231 : int source_width, int source_y_fraction) {
232 0 : int y1_fraction = source_y_fraction;
233 0 : int y0_fraction = 256 - y1_fraction;
234 0 : uint8* end = ybuf + source_width;
235 0 : do {
236 0 : ybuf[0] = (y0_ptr[0] * y0_fraction + y1_ptr[0] * y1_fraction) >> 8;
237 0 : ybuf[1] = (y0_ptr[1] * y0_fraction + y1_ptr[1] * y1_fraction) >> 8;
238 0 : ybuf[2] = (y0_ptr[2] * y0_fraction + y1_ptr[2] * y1_fraction) >> 8;
239 0 : ybuf[3] = (y0_ptr[3] * y0_fraction + y1_ptr[3] * y1_fraction) >> 8;
240 0 : ybuf[4] = (y0_ptr[4] * y0_fraction + y1_ptr[4] * y1_fraction) >> 8;
241 0 : ybuf[5] = (y0_ptr[5] * y0_fraction + y1_ptr[5] * y1_fraction) >> 8;
242 0 : ybuf[6] = (y0_ptr[6] * y0_fraction + y1_ptr[6] * y1_fraction) >> 8;
243 0 : ybuf[7] = (y0_ptr[7] * y0_fraction + y1_ptr[7] * y1_fraction) >> 8;
244 0 : y0_ptr += 8;
245 0 : y1_ptr += 8;
246 0 : ybuf += 8;
247 0 : } while (ybuf < end);
248 0 : }
249 :
250 : #ifdef MOZILLA_MAY_SUPPORT_MMX
251 : void FilterRows_MMX(uint8* ybuf, const uint8* y0_ptr, const uint8* y1_ptr,
252 : int source_width, int source_y_fraction);
253 : #endif
254 :
255 : #ifdef MOZILLA_MAY_SUPPORT_SSE2
256 : void FilterRows_SSE2(uint8* ybuf, const uint8* y0_ptr, const uint8* y1_ptr,
257 : int source_width, int source_y_fraction);
258 : #endif
259 :
260 0 : static inline void FilterRows(uint8* ybuf, const uint8* y0_ptr,
261 : const uint8* y1_ptr, int source_width,
262 : int source_y_fraction) {
263 : #ifdef MOZILLA_MAY_SUPPORT_SSE2
264 0 : if (mozilla::supports_sse2()) {
265 0 : FilterRows_SSE2(ybuf, y0_ptr, y1_ptr, source_width, source_y_fraction);
266 0 : return;
267 : }
268 : #endif
269 :
270 : #ifdef MOZILLA_MAY_SUPPORT_MMX
271 0 : if (mozilla::supports_mmx()) {
272 0 : FilterRows_MMX(ybuf, y0_ptr, y1_ptr, source_width, source_y_fraction);
273 0 : return;
274 : }
275 : #endif
276 :
277 0 : FilterRows_C(ybuf, y0_ptr, y1_ptr, source_width, source_y_fraction);
278 : }
279 :
280 :
281 : // Scale a frame of YUV to 32 bit ARGB.
282 0 : void ScaleYCbCrToRGB32(const uint8* y_buf,
283 : const uint8* u_buf,
284 : const uint8* v_buf,
285 : uint8* rgb_buf,
286 : int source_width,
287 : int source_height,
288 : int width,
289 : int height,
290 : int y_pitch,
291 : int uv_pitch,
292 : int rgb_pitch,
293 : YUVType yuv_type,
294 : YUVColorSpace yuv_color_space,
295 : ScaleFilter filter) {
296 :
297 0 : bool use_deprecated = gfxPrefs::YCbCrAccurateConversion() ||
298 : #if defined(XP_WIN) && defined(_M_X64)
299 : // libyuv does not support SIMD scaling on win 64bit. See Bug 1295927.
300 : supports_sse3() ||
301 : #endif
302 0 : (supports_mmx() && supports_sse() && !supports_sse3());
303 : // The deprecated function only support BT601.
304 : // See Bug 1210357.
305 0 : if (yuv_color_space != YUVColorSpace::BT601) {
306 0 : use_deprecated = false;
307 : }
308 0 : if (use_deprecated) {
309 : ScaleYCbCrToRGB32_deprecated(y_buf, u_buf, v_buf,
310 : rgb_buf,
311 : source_width, source_height,
312 : width, height,
313 : y_pitch, uv_pitch,
314 : rgb_pitch,
315 : yuv_type,
316 : ROTATE_0,
317 0 : filter);
318 0 : return;
319 : }
320 :
321 : DebugOnly<int> err =
322 0 : libyuv::YUVToARGBScale(y_buf, y_pitch,
323 : u_buf, uv_pitch,
324 : v_buf, uv_pitch,
325 0 : FourCCFromYUVType(yuv_type),
326 : yuv_color_space,
327 : source_width, source_height,
328 : rgb_buf, rgb_pitch,
329 : width, height,
330 0 : libyuv::kFilterBilinear);
331 0 : MOZ_ASSERT(!err);
332 0 : return;
333 : }
334 :
335 : // Scale a frame of YUV to 32 bit ARGB.
336 0 : void ScaleYCbCrToRGB32_deprecated(const uint8* y_buf,
337 : const uint8* u_buf,
338 : const uint8* v_buf,
339 : uint8* rgb_buf,
340 : int source_width,
341 : int source_height,
342 : int width,
343 : int height,
344 : int y_pitch,
345 : int uv_pitch,
346 : int rgb_pitch,
347 : YUVType yuv_type,
348 : Rotate view_rotate,
349 : ScaleFilter filter) {
350 0 : bool has_mmx = supports_mmx();
351 :
352 : // 4096 allows 3 buffers to fit in 12k.
353 : // Helps performance on CPU with 16K L1 cache.
354 : // Large enough for 3830x2160 and 30" displays which are 2560x1600.
355 0 : const int kFilterBufferSize = 4096;
356 : // Disable filtering if the screen is too big (to avoid buffer overflows).
357 : // This should never happen to regular users: they don't have monitors
358 : // wider than 4096 pixels.
359 : // TODO(fbarchard): Allow rotated videos to filter.
360 0 : if (source_width > kFilterBufferSize || view_rotate)
361 0 : filter = FILTER_NONE;
362 :
363 0 : unsigned int y_shift = yuv_type == YV12 ? 1 : 0;
364 : // Diagram showing origin and direction of source sampling.
365 : // ->0 4<-
366 : // 7 3
367 : //
368 : // 6 5
369 : // ->1 2<-
370 : // Rotations that start at right side of image.
371 0 : if ((view_rotate == ROTATE_180) ||
372 0 : (view_rotate == ROTATE_270) ||
373 0 : (view_rotate == MIRROR_ROTATE_0) ||
374 : (view_rotate == MIRROR_ROTATE_90)) {
375 0 : y_buf += source_width - 1;
376 0 : u_buf += source_width / 2 - 1;
377 0 : v_buf += source_width / 2 - 1;
378 0 : source_width = -source_width;
379 : }
380 : // Rotations that start at bottom of image.
381 0 : if ((view_rotate == ROTATE_90) ||
382 0 : (view_rotate == ROTATE_180) ||
383 0 : (view_rotate == MIRROR_ROTATE_90) ||
384 : (view_rotate == MIRROR_ROTATE_180)) {
385 0 : y_buf += (source_height - 1) * y_pitch;
386 0 : u_buf += ((source_height >> y_shift) - 1) * uv_pitch;
387 0 : v_buf += ((source_height >> y_shift) - 1) * uv_pitch;
388 0 : source_height = -source_height;
389 : }
390 :
391 : // Handle zero sized destination.
392 0 : if (width == 0 || height == 0)
393 0 : return;
394 0 : int source_dx = source_width * kFractionMax / width;
395 0 : int source_dy = source_height * kFractionMax / height;
396 0 : int source_dx_uv = source_dx;
397 :
398 0 : if ((view_rotate == ROTATE_90) ||
399 : (view_rotate == ROTATE_270)) {
400 0 : int tmp = height;
401 0 : height = width;
402 0 : width = tmp;
403 0 : tmp = source_height;
404 0 : source_height = source_width;
405 0 : source_width = tmp;
406 0 : int original_dx = source_dx;
407 0 : int original_dy = source_dy;
408 0 : source_dx = ((original_dy >> kFractionBits) * y_pitch) << kFractionBits;
409 0 : source_dx_uv = ((original_dy >> kFractionBits) * uv_pitch) << kFractionBits;
410 0 : source_dy = original_dx;
411 0 : if (view_rotate == ROTATE_90) {
412 0 : y_pitch = -1;
413 0 : uv_pitch = -1;
414 0 : source_height = -source_height;
415 : } else {
416 0 : y_pitch = 1;
417 0 : uv_pitch = 1;
418 : }
419 : }
420 :
421 : // Need padding because FilterRows() will write 1 to 16 extra pixels
422 : // after the end for SSE2 version.
423 : uint8 yuvbuf[16 + kFilterBufferSize * 3 + 16];
424 : uint8* ybuf =
425 0 : reinterpret_cast<uint8*>(reinterpret_cast<uintptr_t>(yuvbuf + 15) & ~15);
426 0 : uint8* ubuf = ybuf + kFilterBufferSize;
427 0 : uint8* vbuf = ubuf + kFilterBufferSize;
428 : // TODO(fbarchard): Fixed point math is off by 1 on negatives.
429 0 : int yscale_fixed = (source_height << kFractionBits) / height;
430 :
431 : // TODO(fbarchard): Split this into separate function for better efficiency.
432 0 : for (int y = 0; y < height; ++y) {
433 0 : uint8* dest_pixel = rgb_buf + y * rgb_pitch;
434 0 : int source_y_subpixel = (y * yscale_fixed);
435 0 : if (yscale_fixed >= (kFractionMax * 2)) {
436 0 : source_y_subpixel += kFractionMax / 2; // For 1/2 or less, center filter.
437 : }
438 0 : int source_y = source_y_subpixel >> kFractionBits;
439 :
440 0 : const uint8* y0_ptr = y_buf + source_y * y_pitch;
441 0 : const uint8* y1_ptr = y0_ptr + y_pitch;
442 :
443 0 : const uint8* u0_ptr = u_buf + (source_y >> y_shift) * uv_pitch;
444 0 : const uint8* u1_ptr = u0_ptr + uv_pitch;
445 0 : const uint8* v0_ptr = v_buf + (source_y >> y_shift) * uv_pitch;
446 0 : const uint8* v1_ptr = v0_ptr + uv_pitch;
447 :
448 : // vertical scaler uses 16.8 fixed point
449 0 : int source_y_fraction = (source_y_subpixel & kFractionMask) >> 8;
450 : int source_uv_fraction =
451 0 : ((source_y_subpixel >> y_shift) & kFractionMask) >> 8;
452 :
453 0 : const uint8* y_ptr = y0_ptr;
454 0 : const uint8* u_ptr = u0_ptr;
455 0 : const uint8* v_ptr = v0_ptr;
456 : // Apply vertical filtering if necessary.
457 : // TODO(fbarchard): Remove memcpy when not necessary.
458 0 : if (filter & mozilla::gfx::FILTER_BILINEAR_V) {
459 0 : if (yscale_fixed != kFractionMax &&
460 0 : source_y_fraction && ((source_y + 1) < source_height)) {
461 0 : FilterRows(ybuf, y0_ptr, y1_ptr, source_width, source_y_fraction);
462 : } else {
463 0 : memcpy(ybuf, y0_ptr, source_width);
464 : }
465 0 : y_ptr = ybuf;
466 0 : ybuf[source_width] = ybuf[source_width-1];
467 0 : int uv_source_width = (source_width + 1) / 2;
468 0 : if (yscale_fixed != kFractionMax &&
469 0 : source_uv_fraction &&
470 0 : (((source_y >> y_shift) + 1) < (source_height >> y_shift))) {
471 0 : FilterRows(ubuf, u0_ptr, u1_ptr, uv_source_width, source_uv_fraction);
472 0 : FilterRows(vbuf, v0_ptr, v1_ptr, uv_source_width, source_uv_fraction);
473 : } else {
474 0 : memcpy(ubuf, u0_ptr, uv_source_width);
475 0 : memcpy(vbuf, v0_ptr, uv_source_width);
476 : }
477 0 : u_ptr = ubuf;
478 0 : v_ptr = vbuf;
479 0 : ubuf[uv_source_width] = ubuf[uv_source_width - 1];
480 0 : vbuf[uv_source_width] = vbuf[uv_source_width - 1];
481 : }
482 0 : if (source_dx == kFractionMax) { // Not scaled
483 : FastConvertYUVToRGB32Row(y_ptr, u_ptr, v_ptr,
484 0 : dest_pixel, width);
485 0 : } else if (filter & FILTER_BILINEAR_H) {
486 : LinearScaleYUVToRGB32Row(y_ptr, u_ptr, v_ptr,
487 0 : dest_pixel, width, source_dx);
488 : } else {
489 : // Specialized scalers and rotation.
490 : #if defined(MOZILLA_MAY_SUPPORT_SSE) && defined(_MSC_VER) && defined(_M_IX86)
491 : if(mozilla::supports_sse()) {
492 : if (width == (source_width * 2)) {
493 : DoubleYUVToRGB32Row_SSE(y_ptr, u_ptr, v_ptr,
494 : dest_pixel, width);
495 : } else if ((source_dx & kFractionMask) == 0) {
496 : // Scaling by integer scale factor. ie half.
497 : ConvertYUVToRGB32Row_SSE(y_ptr, u_ptr, v_ptr,
498 : dest_pixel, width,
499 : source_dx >> kFractionBits);
500 : } else if (source_dx_uv == source_dx) { // Not rotated.
501 : ScaleYUVToRGB32Row(y_ptr, u_ptr, v_ptr,
502 : dest_pixel, width, source_dx);
503 : } else {
504 : RotateConvertYUVToRGB32Row_SSE(y_ptr, u_ptr, v_ptr,
505 : dest_pixel, width,
506 : source_dx >> kFractionBits,
507 : source_dx_uv >> kFractionBits);
508 : }
509 : }
510 : else {
511 : ScaleYUVToRGB32Row_C(y_ptr, u_ptr, v_ptr,
512 : dest_pixel, width, source_dx);
513 : }
514 : #else
515 : (void)source_dx_uv;
516 : ScaleYUVToRGB32Row(y_ptr, u_ptr, v_ptr,
517 0 : dest_pixel, width, source_dx);
518 : #endif
519 : }
520 : }
521 : // MMX used for FastConvertYUVToRGB32Row and FilterRows requires emms.
522 : if (has_mmx)
523 : EMMS();
524 : }
525 0 : void ConvertYCbCrAToARGB32(const uint8* y_buf,
526 : const uint8* u_buf,
527 : const uint8* v_buf,
528 : const uint8* a_buf,
529 : uint8* argb_buf,
530 : int pic_width,
531 : int pic_height,
532 : int ya_pitch,
533 : int uv_pitch,
534 : int argb_pitch) {
535 :
536 : // The downstream graphics stack expects an attenuated input, hence why the
537 : // attenuation parameter is set.
538 0 : DebugOnly<int> err = libyuv::I420AlphaToARGB(y_buf, ya_pitch,
539 : u_buf, uv_pitch,
540 : v_buf, uv_pitch,
541 : a_buf, ya_pitch,
542 : argb_buf, argb_pitch,
543 0 : pic_width, pic_height, 1);
544 0 : MOZ_ASSERT(!err);
545 0 : }
546 :
547 : } // namespace gfx
548 : } // namespace mozilla
|
