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Issue 2277603004: Add SplitUVPlanes and MergeUVPlanes (Closed) Base URL: https://chromium.googlesource.com/libyuv/libyuv@master
Patch Set: MergeUVPlanes renamed for consistency with MergeUVRow functions Created 4 years, 3 months ago
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1 /* 1 /*
2 * Copyright 2011 The LibYuv Project Authors. All rights reserved. 2 * Copyright 2011 The LibYuv Project Authors. All rights reserved.
3 * 3 *
4 * Use of this source code is governed by a BSD-style license 4 * Use of this source code is governed by a BSD-style license
5 * that can be found in the LICENSE file in the root of the source 5 * that can be found in the LICENSE file in the root of the source
6 * tree. An additional intellectual property rights grant can be found 6 * tree. An additional intellectual property rights grant can be found
7 * in the file PATENTS. All contributing project authors may 7 * in the file PATENTS. All contributing project authors may
8 * be found in the AUTHORS file in the root of the source tree. 8 * be found in the AUTHORS file in the root of the source tree.
9 */ 9 */
10 10
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33 const uint8* src_v, int src_stride_v, 33 const uint8* src_v, int src_stride_v,
34 uint8* dst_y, int dst_stride_y, 34 uint8* dst_y, int dst_stride_y,
35 uint8* dst_u, int dst_stride_u, 35 uint8* dst_u, int dst_stride_u,
36 uint8* dst_v, int dst_stride_v, 36 uint8* dst_v, int dst_stride_v,
37 int src_y_width, int src_y_height, 37 int src_y_width, int src_y_height,
38 int src_uv_width, int src_uv_height) { 38 int src_uv_width, int src_uv_height) {
39 const int dst_y_width = Abs(src_y_width); 39 const int dst_y_width = Abs(src_y_width);
40 const int dst_y_height = Abs(src_y_height); 40 const int dst_y_height = Abs(src_y_height);
41 const int dst_uv_width = SUBSAMPLE(dst_y_width, 1, 1); 41 const int dst_uv_width = SUBSAMPLE(dst_y_width, 1, 1);
42 const int dst_uv_height = SUBSAMPLE(dst_y_height, 1, 1); 42 const int dst_uv_height = SUBSAMPLE(dst_y_height, 1, 1);
43 if (src_y_width == 0 || src_y_height == 0 || 43 if (src_uv_width == 0 || src_uv_height == 0) {
44 src_uv_width == 0 || src_uv_height == 0) {
45 return -1; 44 return -1;
46 } 45 }
47 // TODO(fbarchard): support NULL for dst_y 46 if (dst_y) {
48 ScalePlane(src_y, src_stride_y, src_y_width, src_y_height, 47 ScalePlane(src_y, src_stride_y, src_y_width, src_y_height,
49 dst_y, dst_stride_y, dst_y_width, dst_y_height, 48 dst_y, dst_stride_y, dst_y_width, dst_y_height,
50 kFilterBilinear); 49 kFilterBilinear);
50 }
51 ScalePlane(src_u, src_stride_u, src_uv_width, src_uv_height, 51 ScalePlane(src_u, src_stride_u, src_uv_width, src_uv_height,
52 dst_u, dst_stride_u, dst_uv_width, dst_uv_height, 52 dst_u, dst_stride_u, dst_uv_width, dst_uv_height,
53 kFilterBilinear); 53 kFilterBilinear);
54 ScalePlane(src_v, src_stride_v, src_uv_width, src_uv_height, 54 ScalePlane(src_v, src_stride_v, src_uv_width, src_uv_height,
55 dst_v, dst_stride_v, dst_uv_width, dst_uv_height, 55 dst_v, dst_stride_v, dst_uv_width, dst_uv_height,
56 kFilterBilinear); 56 kFilterBilinear);
57 return 0; 57 return 0;
58 } 58 }
59 59
60 // Copy I420 with optional flipping 60 // Copy I420 with optional flipping
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222 CopyRow(src, dst, width); 222 CopyRow(src, dst, width);
223 CopyRow(src + src_stride_0, dst + dst_stride, width); 223 CopyRow(src + src_stride_0, dst + dst_stride, width);
224 src += src_stride_0 + src_stride_1; 224 src += src_stride_0 + src_stride_1;
225 dst += dst_stride * 2; 225 dst += dst_stride * 2;
226 } 226 }
227 if (height & 1) { 227 if (height & 1) {
228 CopyRow(src, dst, width); 228 CopyRow(src, dst, width);
229 } 229 }
230 } 230 }
231 231
232 // Support function for NV12 etc UV channels.
233 // Width and height are plane sizes (typically half pixel width).
234 static void SplitUVPlane(const uint8* src_uv, int src_stride_uv,
235 uint8* dst_u, int dst_stride_u,
236 uint8* dst_v, int dst_stride_v,
237 int width, int height) {
238 int y;
239 void (*SplitUVRow)(const uint8* src_uv, uint8* dst_u, uint8* dst_v,
240 int width) = SplitUVRow_C;
241 // Negative height means invert the image.
242 if (height < 0) {
243 height = -height;
244 dst_u = dst_u + (height - 1) * dst_stride_u;
245 dst_v = dst_v + (height - 1) * dst_stride_v;
246 dst_stride_u = -dst_stride_u;
247 dst_stride_v = -dst_stride_v;
248 }
249 // Coalesce rows.
250 if (src_stride_uv == width * 2 &&
251 dst_stride_u == width &&
252 dst_stride_v == width) {
253 width *= height;
254 height = 1;
255 src_stride_uv = dst_stride_u = dst_stride_v = 0;
256 }
257 #if defined(HAS_SPLITUVROW_SSE2)
258 if (TestCpuFlag(kCpuHasSSE2)) {
259 SplitUVRow = SplitUVRow_Any_SSE2;
260 if (IS_ALIGNED(width, 16)) {
261 SplitUVRow = SplitUVRow_SSE2;
262 }
263 }
264 #endif
265 #if defined(HAS_SPLITUVROW_AVX2)
266 if (TestCpuFlag(kCpuHasAVX2)) {
267 SplitUVRow = SplitUVRow_Any_AVX2;
268 if (IS_ALIGNED(width, 32)) {
269 SplitUVRow = SplitUVRow_AVX2;
270 }
271 }
272 #endif
273 #if defined(HAS_SPLITUVROW_NEON)
274 if (TestCpuFlag(kCpuHasNEON)) {
275 SplitUVRow = SplitUVRow_Any_NEON;
276 if (IS_ALIGNED(width, 16)) {
277 SplitUVRow = SplitUVRow_NEON;
278 }
279 }
280 #endif
281 #if defined(HAS_SPLITUVROW_DSPR2)
282 if (TestCpuFlag(kCpuHasDSPR2) &&
283 IS_ALIGNED(dst_u, 4) && IS_ALIGNED(dst_stride_u, 4) &&
284 IS_ALIGNED(dst_v, 4) && IS_ALIGNED(dst_stride_v, 4)) {
285 SplitUVRow = SplitUVRow_Any_DSPR2;
286 if (IS_ALIGNED(width, 16)) {
287 SplitUVRow = SplitUVRow_DSPR2;
288 }
289 }
290 #endif
291
292 for (y = 0; y < height; ++y) {
293 // Copy a row of UV.
294 SplitUVRow(src_uv, dst_u, dst_v, width);
295 dst_u += dst_stride_u;
296 dst_v += dst_stride_v;
297 src_uv += src_stride_uv;
298 }
299 }
300
301 // Support converting from FOURCC_M420 232 // Support converting from FOURCC_M420
302 // Useful for bandwidth constrained transports like USB 1.0 and 2.0 and for 233 // Useful for bandwidth constrained transports like USB 1.0 and 2.0 and for
303 // easy conversion to I420. 234 // easy conversion to I420.
304 // M420 format description: 235 // M420 format description:
305 // M420 is row biplanar 420: 2 rows of Y and 1 row of UV. 236 // M420 is row biplanar 420: 2 rows of Y and 1 row of UV.
306 // Chroma is half width / half height. (420) 237 // Chroma is half width / half height. (420)
307 // src_stride_m420 is row planar. Normally this will be the width in pixels. 238 // src_stride_m420 is row planar. Normally this will be the width in pixels.
308 // The UV plane is half width, but 2 values, so src_stride_m420 applies to 239 // The UV plane is half width, but 2 values, so src_stride_m420 applies to
309 // this as well as the two Y planes. 240 // this as well as the two Y planes.
310 static int X420ToI420(const uint8* src_y, 241 static int X420ToI420(const uint8* src_y,
311 int src_stride_y0, int src_stride_y1, 242 int src_stride_y0, int src_stride_y1,
312 const uint8* src_uv, int src_stride_uv, 243 const uint8* src_uv, int src_stride_uv,
313 uint8* dst_y, int dst_stride_y, 244 uint8* dst_y, int dst_stride_y,
314 uint8* dst_u, int dst_stride_u, 245 uint8* dst_u, int dst_stride_u,
315 uint8* dst_v, int dst_stride_v, 246 uint8* dst_v, int dst_stride_v,
316 int width, int height) { 247 int width, int height) {
317 int halfwidth = (width + 1) >> 1; 248 int halfwidth = (width + 1) >> 1;
318 int halfheight = (height + 1) >> 1; 249 int halfheight = (height + 1) >> 1;
319 if (!src_uv || !dst_u || !dst_v || 250 if (!src_uv || !dst_u || !dst_v ||
320 width <= 0 || height == 0) { 251 width <= 0 || height == 0) {
321 return -1; 252 return -1;
322 } 253 }
323 // Negative height means invert the image. 254 // Negative height means invert the image.
324 if (height < 0) { 255 if (height < 0) {
325 height = -height; 256 height = -height;
326 halfheight = (height + 1) >> 1; 257 halfheight = (height + 1) >> 1;
327 dst_y = dst_y + (height - 1) * dst_stride_y; 258 if (dst_y) {
259 dst_y = dst_y + (height - 1) * dst_stride_y;
260 }
328 dst_u = dst_u + (halfheight - 1) * dst_stride_u; 261 dst_u = dst_u + (halfheight - 1) * dst_stride_u;
329 dst_v = dst_v + (halfheight - 1) * dst_stride_v; 262 dst_v = dst_v + (halfheight - 1) * dst_stride_v;
330 dst_stride_y = -dst_stride_y; 263 dst_stride_y = -dst_stride_y;
331 dst_stride_u = -dst_stride_u; 264 dst_stride_u = -dst_stride_u;
332 dst_stride_v = -dst_stride_v; 265 dst_stride_v = -dst_stride_v;
333 } 266 }
334 // Coalesce rows. 267 // Coalesce rows.
335 if (src_stride_y0 == width && 268 if (src_stride_y0 == width &&
336 src_stride_y1 == width && 269 src_stride_y1 == width &&
337 dst_stride_y == width) { 270 dst_stride_y == width) {
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1485 dst_u += dst_stride_u; 1418 dst_u += dst_stride_u;
1486 dst_v += dst_stride_v; 1419 dst_v += dst_stride_v;
1487 } 1420 }
1488 return 0; 1421 return 0;
1489 } 1422 }
1490 1423
1491 #ifdef __cplusplus 1424 #ifdef __cplusplus
1492 } // extern "C" 1425 } // extern "C"
1493 } // namespace libyuv 1426 } // namespace libyuv
1494 #endif 1427 #endif
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