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Issue 2114843002: API for deinterlacing YUV420 output on Android (Closed) Base URL: https://chromium.googlesource.com/libyuv/libyuv@master
Patch Set: lint fixes for spacing Created 4 years, 5 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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219 CopyRow(src, dst, width); 219 CopyRow(src, dst, width);
220 CopyRow(src + src_stride_0, dst + dst_stride, width); 220 CopyRow(src + src_stride_0, dst + dst_stride, width);
221 src += src_stride_0 + src_stride_1; 221 src += src_stride_0 + src_stride_1;
222 dst += dst_stride * 2; 222 dst += dst_stride * 2;
223 } 223 }
224 if (height & 1) { 224 if (height & 1) {
225 CopyRow(src, dst, width); 225 CopyRow(src, dst, width);
226 } 226 }
227 } 227 }
228 228
229 // Support function for NV12 etc UV channels.
230 // Width and height are plane sizes (typically half pixel width)
231 static void SplitPlane(const uint8* src_uv, int src_stride_uv,
232 uint8* dst_u, int dst_stride_u,
233 uint8* dst_v, int dst_stride_v,
234 int width, int height) {
235 int y;
236 void (*SplitUVRow)(const uint8* src_uv, uint8* dst_u, uint8* dst_v,
237 int width) = SplitUVRow_C;
238 // Negative height means invert the image.
239 if (height < 0) {
240 height = -height;
241 dst_u = dst_u + (height - 1) * dst_stride_u;
242 dst_v = dst_v + (height - 1) * dst_stride_v;
243 dst_stride_u = -dst_stride_u;
244 dst_stride_v = -dst_stride_v;
245 }
246 // Coalesce rows.
247 if (src_stride_uv == width * 2 &&
248 dst_stride_u == width &&
249 dst_stride_v == width) {
250 width *= height;
251 height = 1;
252 src_stride_uv = dst_stride_u = dst_stride_v = 0;
253 }
254 #if defined(HAS_SPLITUVROW_SSE2)
255 if (TestCpuFlag(kCpuHasSSE2)) {
256 SplitUVRow = SplitUVRow_Any_SSE2;
257 if (IS_ALIGNED(width, 16)) {
258 SplitUVRow = SplitUVRow_SSE2;
259 }
260 }
261 #endif
262 #if defined(HAS_SPLITUVROW_AVX2)
263 if (TestCpuFlag(kCpuHasAVX2)) {
264 SplitUVRow = SplitUVRow_Any_AVX2;
265 if (IS_ALIGNED(width, 32)) {
266 SplitUVRow = SplitUVRow_AVX2;
267 }
268 }
269 #endif
270 #if defined(HAS_SPLITUVROW_NEON)
271 if (TestCpuFlag(kCpuHasNEON)) {
272 SplitUVRow = SplitUVRow_Any_NEON;
273 if (IS_ALIGNED(width, 16)) {
274 SplitUVRow = SplitUVRow_NEON;
275 }
276 }
277 #endif
278 #if defined(HAS_SPLITUVROW_DSPR2)
279 if (TestCpuFlag(kCpuHasDSPR2) &&
280 IS_ALIGNED(dst_u, 4) && IS_ALIGNED(dst_stride_u, 4) &&
281 IS_ALIGNED(dst_v, 4) && IS_ALIGNED(dst_stride_v, 4)) {
282 SplitUVRow = SplitUVRow_Any_DSPR2;
283 if (IS_ALIGNED(width, 16)) {
284 SplitUVRow = SplitUVRow_DSPR2;
285 }
286 }
287 #endif
288
289 for (y = 0; y < height; ++y) {
290 // Copy a row of UV.
291 SplitUVRow(src_uv, dst_u, dst_v, width);
292 dst_u += dst_stride_u;
293 dst_v += dst_stride_v;
294 src_uv += src_stride_uv;
295 }
296 }
297
229 // Support converting from FOURCC_M420 298 // Support converting from FOURCC_M420
230 // Useful for bandwidth constrained transports like USB 1.0 and 2.0 and for 299 // Useful for bandwidth constrained transports like USB 1.0 and 2.0 and for
231 // easy conversion to I420. 300 // easy conversion to I420.
232 // M420 format description: 301 // M420 format description:
233 // M420 is row biplanar 420: 2 rows of Y and 1 row of UV. 302 // M420 is row biplanar 420: 2 rows of Y and 1 row of UV.
234 // Chroma is half width / half height. (420) 303 // Chroma is half width / half height. (420)
235 // src_stride_m420 is row planar. Normally this will be the width in pixels. 304 // src_stride_m420 is row planar. Normally this will be the width in pixels.
236 // The UV plane is half width, but 2 values, so src_stride_m420 applies to 305 // The UV plane is half width, but 2 values, so src_stride_m420 applies to
237 // this as well as the two Y planes. 306 // this as well as the two Y planes.
238 static int X420ToI420(const uint8* src_y, 307 static int X420ToI420(const uint8* src_y,
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1376 ARGBToYRow(row, dst_y, width); 1445 ARGBToYRow(row, dst_y, width);
1377 #endif 1446 #endif
1378 } 1447 }
1379 #if !defined(HAS_ARGB4444TOYROW_NEON) 1448 #if !defined(HAS_ARGB4444TOYROW_NEON)
1380 free_aligned_buffer_64(row); 1449 free_aligned_buffer_64(row);
1381 } 1450 }
1382 #endif 1451 #endif
1383 return 0; 1452 return 0;
1384 } 1453 }
1385 1454
1455 static void SplitPixels(const uint8* src_u, int src_pixel_stride_uv,
1456 uint8* dst_u, int width) {
1457 int i;
1458 for (i = 0; i < width; ++i) {
1459 *dst_u = *src_u;
1460 ++dst_u;
1461 src_u += src_pixel_stride_uv;
1462 }
1463 }
1464
1465 // Convert Android420 to I420.
1466 LIBYUV_API
1467 int Android420ToI420(const uint8* src_y, int src_stride_y,
1468 const uint8* src_u, int src_stride_u,
1469 const uint8* src_v, int src_stride_v,
1470 int src_pixel_stride_uv,
1471 uint8* dst_y, int dst_stride_y,
1472 uint8* dst_u, int dst_stride_u,
1473 uint8* dst_v, int dst_stride_v,
1474 int width, int height) {
1475 int y;
1476 const int vu_off = src_v - src_u;
1477 int halfwidth = (width + 1) >> 1;
1478 int halfheight = (height + 1) >> 1;
1479 if (!src_y || !src_u || !src_v ||
1480 !dst_y || !dst_u || !dst_v ||
1481 width <= 0 || height == 0) {
1482 return -1;
1483 }
1484 // Negative height means invert the image.
1485 if (height < 0) {
1486 height = -height;
1487 halfheight = (height + 1) >> 1;
1488 src_y = src_y + (height - 1) * src_stride_y;
1489 src_u = src_u + (halfheight - 1) * src_stride_u;
1490 src_v = src_v + (halfheight - 1) * src_stride_v;
1491 src_stride_y = -src_stride_y;
1492 src_stride_u = -src_stride_u;
1493 src_stride_v = -src_stride_v;
1494 }
1495
1496 if (dst_y) {
1497 CopyPlane(src_y, src_stride_y, dst_y, dst_stride_y, width, height);
1498 }
1499
1500 // Copy UV planes as is - I420
1501 if (src_pixel_stride_uv == 1) {
1502 CopyPlane(src_u, src_stride_u, dst_u, dst_stride_u, halfwidth, halfheight);
1503 CopyPlane(src_v, src_stride_v, dst_v, dst_stride_v, halfwidth, halfheight);
1504 return 0;
1505 // Split UV planes - NV21
1506 } else if (src_pixel_stride_uv == 2 && vu_off == -1 &&
1507 src_stride_u == src_stride_v) {
1508 SplitPlane(src_v, src_stride_v, dst_v, dst_stride_v, dst_u, dst_stride_u,
1509 halfwidth, halfheight);
1510 return 0;
1511 // Split UV planes - NV12
1512 } else if (src_pixel_stride_uv == 2 && vu_off == 1 &&
1513 src_stride_u == src_stride_v) {
1514 SplitPlane(src_u, src_stride_u, dst_u, dst_stride_u, dst_v, dst_stride_v,
1515 halfwidth, halfheight);
1516 return 0;
1517 }
1518
1519 for (y = 0; y < halfheight; ++y) {
1520 SplitPixels(src_u, src_pixel_stride_uv, dst_u, halfwidth);
1521 SplitPixels(src_v, src_pixel_stride_uv, dst_v, halfwidth);
1522 src_u += src_stride_u;
1523 src_v += src_stride_v;
1524 dst_u += dst_stride_u;
1525 dst_v += dst_stride_v;
1526 }
1527 return 0;
1528 }
1529
1386 #ifdef __cplusplus 1530 #ifdef __cplusplus
1387 } // extern "C" 1531 } // extern "C"
1388 } // namespace libyuv 1532 } // namespace libyuv
1389 #endif 1533 #endif
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