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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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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_y_width == 0 || src_y_height == 0 || |
44 src_uv_width == 0 || src_uv_height == 0) { | 44 src_uv_width == 0 || src_uv_height == 0) { |
45 return -1; | 45 return -1; |
46 } | 46 } |
| 47 // TODO(fbarchard): make Y optional. |
47 ScalePlane(src_y, src_stride_y, src_y_width, src_y_height, | 48 ScalePlane(src_y, src_stride_y, src_y_width, src_y_height, |
48 dst_y, dst_stride_y, dst_y_width, dst_y_height, | 49 dst_y, dst_stride_y, dst_y_width, dst_y_height, |
49 kFilterBilinear); | 50 kFilterBilinear); |
50 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, |
51 dst_u, dst_stride_u, dst_uv_width, dst_uv_height, | 52 dst_u, dst_stride_u, dst_uv_width, dst_uv_height, |
52 kFilterBilinear); | 53 kFilterBilinear); |
53 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, |
54 dst_v, dst_stride_v, dst_uv_width, dst_uv_height, | 55 dst_v, dst_stride_v, dst_uv_width, dst_uv_height, |
55 kFilterBilinear); | 56 kFilterBilinear); |
56 return 0; | 57 return 0; |
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306 // this as well as the two Y planes. | 307 // this as well as the two Y planes. |
307 static int X420ToI420(const uint8* src_y, | 308 static int X420ToI420(const uint8* src_y, |
308 int src_stride_y0, int src_stride_y1, | 309 int src_stride_y0, int src_stride_y1, |
309 const uint8* src_uv, int src_stride_uv, | 310 const uint8* src_uv, int src_stride_uv, |
310 uint8* dst_y, int dst_stride_y, | 311 uint8* dst_y, int dst_stride_y, |
311 uint8* dst_u, int dst_stride_u, | 312 uint8* dst_u, int dst_stride_u, |
312 uint8* dst_v, int dst_stride_v, | 313 uint8* dst_v, int dst_stride_v, |
313 int width, int height) { | 314 int width, int height) { |
314 int halfwidth = (width + 1) >> 1; | 315 int halfwidth = (width + 1) >> 1; |
315 int halfheight = (height + 1) >> 1; | 316 int halfheight = (height + 1) >> 1; |
316 if (!src_y || !src_uv || | 317 if (!src_uv || !dst_u || !dst_v || |
317 !dst_y || !dst_u || !dst_v || | |
318 width <= 0 || height == 0) { | 318 width <= 0 || height == 0) { |
319 return -1; | 319 return -1; |
320 } | 320 } |
321 // Negative height means invert the image. | 321 // Negative height means invert the image. |
322 if (height < 0) { | 322 if (height < 0) { |
323 height = -height; | 323 height = -height; |
324 halfheight = (height + 1) >> 1; | 324 halfheight = (height + 1) >> 1; |
325 dst_y = dst_y + (height - 1) * dst_stride_y; | 325 dst_y = dst_y + (height - 1) * dst_stride_y; |
326 dst_u = dst_u + (halfheight - 1) * dst_stride_u; | 326 dst_u = dst_u + (halfheight - 1) * dst_stride_u; |
327 dst_v = dst_v + (halfheight - 1) * dst_stride_v; | 327 dst_v = dst_v + (halfheight - 1) * dst_stride_v; |
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1483 dst_u += dst_stride_u; | 1483 dst_u += dst_stride_u; |
1484 dst_v += dst_stride_v; | 1484 dst_v += dst_stride_v; |
1485 } | 1485 } |
1486 return 0; | 1486 return 0; |
1487 } | 1487 } |
1488 | 1488 |
1489 #ifdef __cplusplus | 1489 #ifdef __cplusplus |
1490 } // extern "C" | 1490 } // extern "C" |
1491 } // namespace libyuv | 1491 } // namespace libyuv |
1492 #endif | 1492 #endif |
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