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Diffstat (limited to 'thirdparty/libwebp/sharpyuv/sharpyuv_neon.c')
| -rw-r--r-- | thirdparty/libwebp/sharpyuv/sharpyuv_neon.c | 182 |
1 files changed, 182 insertions, 0 deletions
diff --git a/thirdparty/libwebp/sharpyuv/sharpyuv_neon.c b/thirdparty/libwebp/sharpyuv/sharpyuv_neon.c new file mode 100644 index 0000000000..5cf6aaffb0 --- /dev/null +++ b/thirdparty/libwebp/sharpyuv/sharpyuv_neon.c @@ -0,0 +1,182 @@ +// Copyright 2022 Google Inc. All Rights Reserved. +// +// Use of this source code is governed by a BSD-style license +// that can be found in the COPYING file in the root of the source +// tree. An additional intellectual property rights grant can be found +// in the file PATENTS. All contributing project authors may +// be found in the AUTHORS file in the root of the source tree. +// ----------------------------------------------------------------------------- +// +// Speed-critical functions for Sharp YUV. +// +// Author: Skal (pascal.massimino@gmail.com) + +#include "sharpyuv/sharpyuv_dsp.h" + +#if defined(WEBP_USE_NEON) +#include <assert.h> +#include <stdlib.h> +#include <arm_neon.h> +#endif + +extern void InitSharpYuvNEON(void); + +#if defined(WEBP_USE_NEON) + +static uint16_t clip_NEON(int v, int max) { + return (v < 0) ? 0 : (v > max) ? max : (uint16_t)v; +} + +static uint64_t SharpYuvUpdateY_NEON(const uint16_t* ref, const uint16_t* src, + uint16_t* dst, int len, int bit_depth) { + const int max_y = (1 << bit_depth) - 1; + int i; + const int16x8_t zero = vdupq_n_s16(0); + const int16x8_t max = vdupq_n_s16(max_y); + uint64x2_t sum = vdupq_n_u64(0); + uint64_t diff; + + for (i = 0; i + 8 <= len; i += 8) { + const int16x8_t A = vreinterpretq_s16_u16(vld1q_u16(ref + i)); + const int16x8_t B = vreinterpretq_s16_u16(vld1q_u16(src + i)); + const int16x8_t C = vreinterpretq_s16_u16(vld1q_u16(dst + i)); + const int16x8_t D = vsubq_s16(A, B); // diff_y + const int16x8_t F = vaddq_s16(C, D); // new_y + const uint16x8_t H = + vreinterpretq_u16_s16(vmaxq_s16(vminq_s16(F, max), zero)); + const int16x8_t I = vabsq_s16(D); // abs(diff_y) + vst1q_u16(dst + i, H); + sum = vpadalq_u32(sum, vpaddlq_u16(vreinterpretq_u16_s16(I))); + } + diff = vgetq_lane_u64(sum, 0) + vgetq_lane_u64(sum, 1); + for (; i < len; ++i) { + const int diff_y = ref[i] - src[i]; + const int new_y = (int)(dst[i]) + diff_y; + dst[i] = clip_NEON(new_y, max_y); + diff += (uint64_t)(abs(diff_y)); + } + return diff; +} + +static void SharpYuvUpdateRGB_NEON(const int16_t* ref, const int16_t* src, + int16_t* dst, int len) { + int i; + for (i = 0; i + 8 <= len; i += 8) { + const int16x8_t A = vld1q_s16(ref + i); + const int16x8_t B = vld1q_s16(src + i); + const int16x8_t C = vld1q_s16(dst + i); + const int16x8_t D = vsubq_s16(A, B); // diff_uv + const int16x8_t E = vaddq_s16(C, D); // new_uv + vst1q_s16(dst + i, E); + } + for (; i < len; ++i) { + const int diff_uv = ref[i] - src[i]; + dst[i] += diff_uv; + } +} + +static void SharpYuvFilterRow16_NEON(const int16_t* A, const int16_t* B, + int len, const uint16_t* best_y, + uint16_t* out, int bit_depth) { + const int max_y = (1 << bit_depth) - 1; + int i; + const int16x8_t max = vdupq_n_s16(max_y); + const int16x8_t zero = vdupq_n_s16(0); + for (i = 0; i + 8 <= len; i += 8) { + const int16x8_t a0 = vld1q_s16(A + i + 0); + const int16x8_t a1 = vld1q_s16(A + i + 1); + const int16x8_t b0 = vld1q_s16(B + i + 0); + const int16x8_t b1 = vld1q_s16(B + i + 1); + const int16x8_t a0b1 = vaddq_s16(a0, b1); + const int16x8_t a1b0 = vaddq_s16(a1, b0); + const int16x8_t a0a1b0b1 = vaddq_s16(a0b1, a1b0); // A0+A1+B0+B1 + const int16x8_t a0b1_2 = vaddq_s16(a0b1, a0b1); // 2*(A0+B1) + const int16x8_t a1b0_2 = vaddq_s16(a1b0, a1b0); // 2*(A1+B0) + const int16x8_t c0 = vshrq_n_s16(vaddq_s16(a0b1_2, a0a1b0b1), 3); + const int16x8_t c1 = vshrq_n_s16(vaddq_s16(a1b0_2, a0a1b0b1), 3); + const int16x8_t e0 = vrhaddq_s16(c1, a0); + const int16x8_t e1 = vrhaddq_s16(c0, a1); + const int16x8x2_t f = vzipq_s16(e0, e1); + const int16x8_t g0 = vreinterpretq_s16_u16(vld1q_u16(best_y + 2 * i + 0)); + const int16x8_t g1 = vreinterpretq_s16_u16(vld1q_u16(best_y + 2 * i + 8)); + const int16x8_t h0 = vaddq_s16(g0, f.val[0]); + const int16x8_t h1 = vaddq_s16(g1, f.val[1]); + const int16x8_t i0 = vmaxq_s16(vminq_s16(h0, max), zero); + const int16x8_t i1 = vmaxq_s16(vminq_s16(h1, max), zero); + vst1q_u16(out + 2 * i + 0, vreinterpretq_u16_s16(i0)); + vst1q_u16(out + 2 * i + 8, vreinterpretq_u16_s16(i1)); + } + for (; i < len; ++i) { + const int a0b1 = A[i + 0] + B[i + 1]; + const int a1b0 = A[i + 1] + B[i + 0]; + const int a0a1b0b1 = a0b1 + a1b0 + 8; + const int v0 = (8 * A[i + 0] + 2 * a1b0 + a0a1b0b1) >> 4; + const int v1 = (8 * A[i + 1] + 2 * a0b1 + a0a1b0b1) >> 4; + out[2 * i + 0] = clip_NEON(best_y[2 * i + 0] + v0, max_y); + out[2 * i + 1] = clip_NEON(best_y[2 * i + 1] + v1, max_y); + } +} + +static void SharpYuvFilterRow32_NEON(const int16_t* A, const int16_t* B, + int len, const uint16_t* best_y, + uint16_t* out, int bit_depth) { + const int max_y = (1 << bit_depth) - 1; + int i; + const uint16x8_t max = vdupq_n_u16(max_y); + for (i = 0; i + 4 <= len; i += 4) { + const int16x4_t a0 = vld1_s16(A + i + 0); + const int16x4_t a1 = vld1_s16(A + i + 1); + const int16x4_t b0 = vld1_s16(B + i + 0); + const int16x4_t b1 = vld1_s16(B + i + 1); + const int32x4_t a0b1 = vaddl_s16(a0, b1); + const int32x4_t a1b0 = vaddl_s16(a1, b0); + const int32x4_t a0a1b0b1 = vaddq_s32(a0b1, a1b0); // A0+A1+B0+B1 + const int32x4_t a0b1_2 = vaddq_s32(a0b1, a0b1); // 2*(A0+B1) + const int32x4_t a1b0_2 = vaddq_s32(a1b0, a1b0); // 2*(A1+B0) + const int32x4_t c0 = vshrq_n_s32(vaddq_s32(a0b1_2, a0a1b0b1), 3); + const int32x4_t c1 = vshrq_n_s32(vaddq_s32(a1b0_2, a0a1b0b1), 3); + const int32x4_t e0 = vrhaddq_s32(c1, vmovl_s16(a0)); + const int32x4_t e1 = vrhaddq_s32(c0, vmovl_s16(a1)); + const int32x4x2_t f = vzipq_s32(e0, e1); + + const int16x8_t g = vreinterpretq_s16_u16(vld1q_u16(best_y + 2 * i)); + const int32x4_t h0 = vaddw_s16(f.val[0], vget_low_s16(g)); + const int32x4_t h1 = vaddw_s16(f.val[1], vget_high_s16(g)); + const uint16x8_t i_16 = vcombine_u16(vqmovun_s32(h0), vqmovun_s32(h1)); + const uint16x8_t i_clamped = vminq_u16(i_16, max); + vst1q_u16(out + 2 * i + 0, i_clamped); + } + for (; i < len; ++i) { + const int a0b1 = A[i + 0] + B[i + 1]; + const int a1b0 = A[i + 1] + B[i + 0]; + const int a0a1b0b1 = a0b1 + a1b0 + 8; + const int v0 = (8 * A[i + 0] + 2 * a1b0 + a0a1b0b1) >> 4; + const int v1 = (8 * A[i + 1] + 2 * a0b1 + a0a1b0b1) >> 4; + out[2 * i + 0] = clip_NEON(best_y[2 * i + 0] + v0, max_y); + out[2 * i + 1] = clip_NEON(best_y[2 * i + 1] + v1, max_y); + } +} + +static void SharpYuvFilterRow_NEON(const int16_t* A, const int16_t* B, int len, + const uint16_t* best_y, uint16_t* out, + int bit_depth) { + if (bit_depth <= 10) { + SharpYuvFilterRow16_NEON(A, B, len, best_y, out, bit_depth); + } else { + SharpYuvFilterRow32_NEON(A, B, len, best_y, out, bit_depth); + } +} + +//------------------------------------------------------------------------------ + +WEBP_TSAN_IGNORE_FUNCTION void InitSharpYuvNEON(void) { + SharpYuvUpdateY = SharpYuvUpdateY_NEON; + SharpYuvUpdateRGB = SharpYuvUpdateRGB_NEON; + SharpYuvFilterRow = SharpYuvFilterRow_NEON; +} + +#else // !WEBP_USE_NEON + +void InitSharpYuvNEON(void) {} + +#endif // WEBP_USE_NEON |