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Issue 2399153004: libyuv::YUY2ToY for isolating Y channel of YUY2. (Closed)
Patch Set: coalesce for YUY2ToY Created 4 years, 2 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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581 UYVYToUV422Row(src_uyvy, dst_u, dst_v, width); 581 UYVYToUV422Row(src_uyvy, dst_u, dst_v, width);
582 UYVYToYRow(src_uyvy, dst_y, width); 582 UYVYToYRow(src_uyvy, dst_y, width);
583 src_uyvy += src_stride_uyvy; 583 src_uyvy += src_stride_uyvy;
584 dst_y += dst_stride_y; 584 dst_y += dst_stride_y;
585 dst_u += dst_stride_u; 585 dst_u += dst_stride_u;
586 dst_v += dst_stride_v; 586 dst_v += dst_stride_v;
587 } 587 }
588 return 0; 588 return 0;
589 } 589 }
590 590
591 // Convert YUY2 to Y.
592 LIBYUV_API
593 int YUY2ToY(const uint8* src_yuy2, int src_stride_yuy2,
594 uint8* dst_y, int dst_stride_y,
595 int width, int height) {
596 int y;
597 void (*YUY2ToYRow)(const uint8* src_yuy2, uint8* dst_y, int width) =
598 YUY2ToYRow_C;
599 if (!src_yuy2 || !dst_y || width <= 0 || height == 0) {
600 return -1;
601 }
602 // Negative height means invert the image.
603 if (height < 0) {
604 height = -height;
605 src_yuy2 = src_yuy2 + (height - 1) * src_stride_yuy2;
606 src_stride_yuy2 = -src_stride_yuy2;
607 }
608 // Coalesce rows.
609 if (src_stride_yuy2 == width * 2 &&
610 dst_stride_y == width) {
611 width *= height;
612 height = 1;
613 src_stride_yuy2 = dst_stride_y = 0;
614 }
615 #if defined(HAS_YUY2TOYROW_SSE2)
616 if (TestCpuFlag(kCpuHasSSE2)) {
617 YUY2ToYRow = YUY2ToYRow_Any_SSE2;
618 if (IS_ALIGNED(width, 16)) {
619 YUY2ToYRow = YUY2ToYRow_SSE2;
620 }
621 }
622 #endif
623 #if defined(HAS_YUY2TOYROW_AVX2)
624 if (TestCpuFlag(kCpuHasAVX2)) {
625 YUY2ToYRow = YUY2ToYRow_Any_AVX2;
626 if (IS_ALIGNED(width, 32)) {
627 YUY2ToYRow = YUY2ToYRow_AVX2;
628 }
629 }
630 #endif
631 #if defined(HAS_YUY2TOYROW_NEON)
632 if (TestCpuFlag(kCpuHasNEON)) {
633 YUY2ToYRow = YUY2ToYRow_Any_NEON;
634 if (IS_ALIGNED(width, 16)) {
635 YUY2ToYRow = YUY2ToYRow_NEON;
636 }
637 }
638 #endif
639 #if defined(HAS_YUY2TOYROW_MSA)
640 if (TestCpuFlag(kCpuHasMSA)) {
641 YUY2ToYRow = YUY2ToYRow_Any_MSA;
642 if (IS_ALIGNED(width, 32)) {
643 YUY2ToYRow = YUY2ToYRow_MSA;
644 }
645 }
646 #endif
647
648 for (y = 0; y < height; ++y) {
649 YUY2ToYRow(src_yuy2, dst_y, width);
650 src_yuy2 += src_stride_yuy2;
651 dst_y += dst_stride_y;
652 }
653 return 0;
654 }
655
591 // Mirror I400 with optional flipping 656 // Mirror I400 with optional flipping
592 LIBYUV_API 657 LIBYUV_API
593 int I400Mirror(const uint8* src_y, int src_stride_y, 658 int I400Mirror(const uint8* src_y, int src_stride_y,
594 uint8* dst_y, int dst_stride_y, 659 uint8* dst_y, int dst_stride_y,
595 int width, int height) { 660 int width, int height) {
596 if (!src_y || !dst_y || 661 if (!src_y || !dst_y ||
597 width <= 0 || height == 0) { 662 width <= 0 || height == 0) {
598 return -1; 663 return -1;
599 } 664 }
600 // Negative height means invert the image. 665 // Negative height means invert the image.
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2692 #endif 2757 #endif
2693 2758
2694 for (y = 0; y < height; ++y) { 2759 for (y = 0; y < height; ++y) {
2695 ARGBCopyYToAlphaRow(src_y, dst_argb, width); 2760 ARGBCopyYToAlphaRow(src_y, dst_argb, width);
2696 src_y += src_stride_y; 2761 src_y += src_stride_y;
2697 dst_argb += dst_stride_argb; 2762 dst_argb += dst_stride_argb;
2698 } 2763 }
2699 return 0; 2764 return 0;
2700 } 2765 }
2701 2766
2767
2702 // TODO(fbarchard): Consider if width is even Y channel can be split 2768 // TODO(fbarchard): Consider if width is even Y channel can be split
2703 // directly. A SplitUVRow_Odd function could copy the remaining chroma. 2769 // directly. A SplitUVRow_Odd function could copy the remaining chroma.
2704 2770
2705 LIBYUV_API 2771 LIBYUV_API
2706 int YUY2ToNV12(const uint8* src_yuy2, int src_stride_yuy2, 2772 int YUY2ToNV12(const uint8* src_yuy2, int src_stride_yuy2,
2707 uint8* dst_y, int dst_stride_y, 2773 uint8* dst_y, int dst_stride_y,
2708 uint8* dst_uv, int dst_stride_uv, 2774 uint8* dst_uv, int dst_stride_uv,
2709 int width, int height) { 2775 int width, int height) {
2710 int y; 2776 int y;
2711 int halfwidth = (width + 1) >> 1; 2777 int halfwidth = (width + 1) >> 1;
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2895 } 2961 }
2896 free_aligned_buffer_64(rows); 2962 free_aligned_buffer_64(rows);
2897 } 2963 }
2898 return 0; 2964 return 0;
2899 } 2965 }
2900 2966
2901 #ifdef __cplusplus 2967 #ifdef __cplusplus
2902 } // extern "C" 2968 } // extern "C"
2903 } // namespace libyuv 2969 } // namespace libyuv
2904 #endif 2970 #endif
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