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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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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. | 232 LIBYUV_API |
233 // Width and height are plane sizes (typically half pixel width). | 233 int SplitUVPlane(const uint8* src_uv, int src_stride_uv, |
234 static void SplitUVPlane(const uint8* src_uv, int src_stride_uv, | 234 uint8* dst_u, int dst_stride_u, |
235 uint8* dst_u, int dst_stride_u, | 235 uint8* dst_v, int dst_stride_v, |
236 uint8* dst_v, int dst_stride_v, | 236 int width, int height) { |
237 int width, int height) { | 237 if (!src_uv || !dst_u || !dst_v || width <= 0 || height == 0) { |
238 int y; | 238 return -1; |
239 void (*SplitUVRow)(const uint8* src_uv, uint8* dst_u, uint8* dst_v, | 239 } |
240 int width) = SplitUVRow_C; | |
241 // Negative height means invert the image. | 240 // Negative height means invert the image. |
242 if (height < 0) { | 241 if (height < 0) { |
243 height = -height; | 242 height = -height; |
244 dst_u = dst_u + (height - 1) * dst_stride_u; | 243 dst_u = dst_u + (height - 1) * dst_stride_u; |
245 dst_v = dst_v + (height - 1) * dst_stride_v; | 244 dst_v = dst_v + (height - 1) * dst_stride_v; |
246 dst_stride_u = -dst_stride_u; | 245 dst_stride_u = -dst_stride_u; |
247 dst_stride_v = -dst_stride_v; | 246 dst_stride_v = -dst_stride_v; |
248 } | 247 } |
249 // Coalesce rows. | 248 // Coalesce rows. |
250 if (src_stride_uv == width * 2 && | 249 if (src_stride_uv == width * 2 && |
251 dst_stride_u == width && | 250 dst_stride_u == width && |
252 dst_stride_v == width) { | 251 dst_stride_v == width) { |
253 width *= height; | 252 width *= height; |
254 height = 1; | 253 height = 1; |
255 src_stride_uv = dst_stride_u = dst_stride_v = 0; | 254 src_stride_uv = dst_stride_u = dst_stride_v = 0; |
256 } | 255 } |
257 #if defined(HAS_SPLITUVROW_SSE2) | 256 SplitUVRowFunction SplitUVRow = GetOptimizedSplitUVRowFunction( |
258 if (TestCpuFlag(kCpuHasSSE2)) { | 257 src_uv, src_stride_uv, dst_u, dst_stride_u, dst_v, dst_stride_v, width); |
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 | 258 |
292 for (y = 0; y < height; ++y) { | 259 for (int y = 0; y < height; ++y) { |
293 // Copy a row of UV. | 260 // Copy a row of UV. |
294 SplitUVRow(src_uv, dst_u, dst_v, width); | 261 SplitUVRow(src_uv, dst_u, dst_v, width); |
295 dst_u += dst_stride_u; | 262 dst_u += dst_stride_u; |
296 dst_v += dst_stride_v; | 263 dst_v += dst_stride_v; |
297 src_uv += src_stride_uv; | 264 src_uv += src_stride_uv; |
298 } | 265 } |
| 266 return 0; |
299 } | 267 } |
300 | 268 |
301 // Support converting from FOURCC_M420 | 269 // Support converting from FOURCC_M420 |
302 // Useful for bandwidth constrained transports like USB 1.0 and 2.0 and for | 270 // Useful for bandwidth constrained transports like USB 1.0 and 2.0 and for |
303 // easy conversion to I420. | 271 // easy conversion to I420. |
304 // M420 format description: | 272 // M420 format description: |
305 // M420 is row biplanar 420: 2 rows of Y and 1 row of UV. | 273 // M420 is row biplanar 420: 2 rows of Y and 1 row of UV. |
306 // Chroma is half width / half height. (420) | 274 // Chroma is half width / half height. (420) |
307 // src_stride_m420 is row planar. Normally this will be the width in pixels. | 275 // 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 | 276 // The UV plane is half width, but 2 values, so src_stride_m420 applies to |
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1485 dst_u += dst_stride_u; | 1453 dst_u += dst_stride_u; |
1486 dst_v += dst_stride_v; | 1454 dst_v += dst_stride_v; |
1487 } | 1455 } |
1488 return 0; | 1456 return 0; |
1489 } | 1457 } |
1490 | 1458 |
1491 #ifdef __cplusplus | 1459 #ifdef __cplusplus |
1492 } // extern "C" | 1460 } // extern "C" |
1493 } // namespace libyuv | 1461 } // namespace libyuv |
1494 #endif | 1462 #endif |
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