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Unified Diff: webrtc/modules/audio_processing/aec/aec_rdft_neon.cc

Issue 2348213002: Move the aec_rdft* files to a more proper place beneath APM and make them thread-safe. (Closed)
Patch Set: Rebase Created 4 years, 2 months ago
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Index: webrtc/modules/audio_processing/aec/aec_rdft_neon.cc
diff --git a/webrtc/modules/audio_processing/aec/aec_rdft_neon.cc b/webrtc/modules/audio_processing/aec/aec_rdft_neon.cc
deleted file mode 100644
index 43b6a68cd725c640e372387a4dbf598a59fcbd7b..0000000000000000000000000000000000000000
--- a/webrtc/modules/audio_processing/aec/aec_rdft_neon.cc
+++ /dev/null
@@ -1,355 +0,0 @@
-/*
- * Copyright (c) 2014 The WebRTC project authors. All Rights Reserved.
- *
- * Use of this source code is governed by a BSD-style license
- * that can be found in the LICENSE 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.
- */
-
-/*
- * The rdft AEC algorithm, neon version of speed-critical functions.
- *
- * Based on the sse2 version.
- */
-
-
-#include "webrtc/modules/audio_processing/aec/aec_rdft.h"
-
-#include <arm_neon.h>
-
-static const ALIGN16_BEG float ALIGN16_END
- k_swap_sign[4] = {-1.f, 1.f, -1.f, 1.f};
-
-static void cft1st_128_neon(float* a) {
- const float32x4_t vec_swap_sign = vld1q_f32((float32_t*)k_swap_sign);
- int j, k2;
-
- for (k2 = 0, j = 0; j < 128; j += 16, k2 += 4) {
- float32x4_t a00v = vld1q_f32(&a[j + 0]);
- float32x4_t a04v = vld1q_f32(&a[j + 4]);
- float32x4_t a08v = vld1q_f32(&a[j + 8]);
- float32x4_t a12v = vld1q_f32(&a[j + 12]);
- float32x4_t a01v = vcombine_f32(vget_low_f32(a00v), vget_low_f32(a08v));
- float32x4_t a23v = vcombine_f32(vget_high_f32(a00v), vget_high_f32(a08v));
- float32x4_t a45v = vcombine_f32(vget_low_f32(a04v), vget_low_f32(a12v));
- float32x4_t a67v = vcombine_f32(vget_high_f32(a04v), vget_high_f32(a12v));
- const float32x4_t wk1rv = vld1q_f32(&rdft_wk1r[k2]);
- const float32x4_t wk1iv = vld1q_f32(&rdft_wk1i[k2]);
- const float32x4_t wk2rv = vld1q_f32(&rdft_wk2r[k2]);
- const float32x4_t wk2iv = vld1q_f32(&rdft_wk2i[k2]);
- const float32x4_t wk3rv = vld1q_f32(&rdft_wk3r[k2]);
- const float32x4_t wk3iv = vld1q_f32(&rdft_wk3i[k2]);
- float32x4_t x0v = vaddq_f32(a01v, a23v);
- const float32x4_t x1v = vsubq_f32(a01v, a23v);
- const float32x4_t x2v = vaddq_f32(a45v, a67v);
- const float32x4_t x3v = vsubq_f32(a45v, a67v);
- const float32x4_t x3w = vrev64q_f32(x3v);
- float32x4_t x0w;
- a01v = vaddq_f32(x0v, x2v);
- x0v = vsubq_f32(x0v, x2v);
- x0w = vrev64q_f32(x0v);
- a45v = vmulq_f32(wk2rv, x0v);
- a45v = vmlaq_f32(a45v, wk2iv, x0w);
- x0v = vmlaq_f32(x1v, x3w, vec_swap_sign);
- x0w = vrev64q_f32(x0v);
- a23v = vmulq_f32(wk1rv, x0v);
- a23v = vmlaq_f32(a23v, wk1iv, x0w);
- x0v = vmlsq_f32(x1v, x3w, vec_swap_sign);
- x0w = vrev64q_f32(x0v);
- a67v = vmulq_f32(wk3rv, x0v);
- a67v = vmlaq_f32(a67v, wk3iv, x0w);
- a00v = vcombine_f32(vget_low_f32(a01v), vget_low_f32(a23v));
- a04v = vcombine_f32(vget_low_f32(a45v), vget_low_f32(a67v));
- a08v = vcombine_f32(vget_high_f32(a01v), vget_high_f32(a23v));
- a12v = vcombine_f32(vget_high_f32(a45v), vget_high_f32(a67v));
- vst1q_f32(&a[j + 0], a00v);
- vst1q_f32(&a[j + 4], a04v);
- vst1q_f32(&a[j + 8], a08v);
- vst1q_f32(&a[j + 12], a12v);
- }
-}
-
-static void cftmdl_128_neon(float* a) {
- int j;
- const int l = 8;
- const float32x4_t vec_swap_sign = vld1q_f32((float32_t*)k_swap_sign);
- float32x4_t wk1rv = vld1q_f32(cftmdl_wk1r);
-
- for (j = 0; j < l; j += 2) {
- const float32x2_t a_00 = vld1_f32(&a[j + 0]);
- const float32x2_t a_08 = vld1_f32(&a[j + 8]);
- const float32x2_t a_32 = vld1_f32(&a[j + 32]);
- const float32x2_t a_40 = vld1_f32(&a[j + 40]);
- const float32x4_t a_00_32 = vcombine_f32(a_00, a_32);
- const float32x4_t a_08_40 = vcombine_f32(a_08, a_40);
- const float32x4_t x0r0_0i0_0r1_x0i1 = vaddq_f32(a_00_32, a_08_40);
- const float32x4_t x1r0_1i0_1r1_x1i1 = vsubq_f32(a_00_32, a_08_40);
- const float32x2_t a_16 = vld1_f32(&a[j + 16]);
- const float32x2_t a_24 = vld1_f32(&a[j + 24]);
- const float32x2_t a_48 = vld1_f32(&a[j + 48]);
- const float32x2_t a_56 = vld1_f32(&a[j + 56]);
- const float32x4_t a_16_48 = vcombine_f32(a_16, a_48);
- const float32x4_t a_24_56 = vcombine_f32(a_24, a_56);
- const float32x4_t x2r0_2i0_2r1_x2i1 = vaddq_f32(a_16_48, a_24_56);
- const float32x4_t x3r0_3i0_3r1_x3i1 = vsubq_f32(a_16_48, a_24_56);
- const float32x4_t xx0 = vaddq_f32(x0r0_0i0_0r1_x0i1, x2r0_2i0_2r1_x2i1);
- const float32x4_t xx1 = vsubq_f32(x0r0_0i0_0r1_x0i1, x2r0_2i0_2r1_x2i1);
- const float32x4_t x3i0_3r0_3i1_x3r1 = vrev64q_f32(x3r0_3i0_3r1_x3i1);
- const float32x4_t x1_x3_add =
- vmlaq_f32(x1r0_1i0_1r1_x1i1, vec_swap_sign, x3i0_3r0_3i1_x3r1);
- const float32x4_t x1_x3_sub =
- vmlsq_f32(x1r0_1i0_1r1_x1i1, vec_swap_sign, x3i0_3r0_3i1_x3r1);
- const float32x2_t yy0_a = vdup_lane_f32(vget_high_f32(x1_x3_add), 0);
- const float32x2_t yy0_s = vdup_lane_f32(vget_high_f32(x1_x3_sub), 0);
- const float32x4_t yy0_as = vcombine_f32(yy0_a, yy0_s);
- const float32x2_t yy1_a = vdup_lane_f32(vget_high_f32(x1_x3_add), 1);
- const float32x2_t yy1_s = vdup_lane_f32(vget_high_f32(x1_x3_sub), 1);
- const float32x4_t yy1_as = vcombine_f32(yy1_a, yy1_s);
- const float32x4_t yy0 = vmlaq_f32(yy0_as, vec_swap_sign, yy1_as);
- const float32x4_t yy4 = vmulq_f32(wk1rv, yy0);
- const float32x4_t xx1_rev = vrev64q_f32(xx1);
- const float32x4_t yy4_rev = vrev64q_f32(yy4);
-
- vst1_f32(&a[j + 0], vget_low_f32(xx0));
- vst1_f32(&a[j + 32], vget_high_f32(xx0));
- vst1_f32(&a[j + 16], vget_low_f32(xx1));
- vst1_f32(&a[j + 48], vget_high_f32(xx1_rev));
-
- a[j + 48] = -a[j + 48];
-
- vst1_f32(&a[j + 8], vget_low_f32(x1_x3_add));
- vst1_f32(&a[j + 24], vget_low_f32(x1_x3_sub));
- vst1_f32(&a[j + 40], vget_low_f32(yy4));
- vst1_f32(&a[j + 56], vget_high_f32(yy4_rev));
- }
-
- {
- const int k = 64;
- const int k1 = 2;
- const int k2 = 2 * k1;
- const float32x4_t wk2rv = vld1q_f32(&rdft_wk2r[k2 + 0]);
- const float32x4_t wk2iv = vld1q_f32(&rdft_wk2i[k2 + 0]);
- const float32x4_t wk1iv = vld1q_f32(&rdft_wk1i[k2 + 0]);
- const float32x4_t wk3rv = vld1q_f32(&rdft_wk3r[k2 + 0]);
- const float32x4_t wk3iv = vld1q_f32(&rdft_wk3i[k2 + 0]);
- wk1rv = vld1q_f32(&rdft_wk1r[k2 + 0]);
- for (j = k; j < l + k; j += 2) {
- const float32x2_t a_00 = vld1_f32(&a[j + 0]);
- const float32x2_t a_08 = vld1_f32(&a[j + 8]);
- const float32x2_t a_32 = vld1_f32(&a[j + 32]);
- const float32x2_t a_40 = vld1_f32(&a[j + 40]);
- const float32x4_t a_00_32 = vcombine_f32(a_00, a_32);
- const float32x4_t a_08_40 = vcombine_f32(a_08, a_40);
- const float32x4_t x0r0_0i0_0r1_x0i1 = vaddq_f32(a_00_32, a_08_40);
- const float32x4_t x1r0_1i0_1r1_x1i1 = vsubq_f32(a_00_32, a_08_40);
- const float32x2_t a_16 = vld1_f32(&a[j + 16]);
- const float32x2_t a_24 = vld1_f32(&a[j + 24]);
- const float32x2_t a_48 = vld1_f32(&a[j + 48]);
- const float32x2_t a_56 = vld1_f32(&a[j + 56]);
- const float32x4_t a_16_48 = vcombine_f32(a_16, a_48);
- const float32x4_t a_24_56 = vcombine_f32(a_24, a_56);
- const float32x4_t x2r0_2i0_2r1_x2i1 = vaddq_f32(a_16_48, a_24_56);
- const float32x4_t x3r0_3i0_3r1_x3i1 = vsubq_f32(a_16_48, a_24_56);
- const float32x4_t xx = vaddq_f32(x0r0_0i0_0r1_x0i1, x2r0_2i0_2r1_x2i1);
- const float32x4_t xx1 = vsubq_f32(x0r0_0i0_0r1_x0i1, x2r0_2i0_2r1_x2i1);
- const float32x4_t x3i0_3r0_3i1_x3r1 = vrev64q_f32(x3r0_3i0_3r1_x3i1);
- const float32x4_t x1_x3_add =
- vmlaq_f32(x1r0_1i0_1r1_x1i1, vec_swap_sign, x3i0_3r0_3i1_x3r1);
- const float32x4_t x1_x3_sub =
- vmlsq_f32(x1r0_1i0_1r1_x1i1, vec_swap_sign, x3i0_3r0_3i1_x3r1);
- float32x4_t xx4 = vmulq_f32(wk2rv, xx1);
- float32x4_t xx12 = vmulq_f32(wk1rv, x1_x3_add);
- float32x4_t xx22 = vmulq_f32(wk3rv, x1_x3_sub);
- xx4 = vmlaq_f32(xx4, wk2iv, vrev64q_f32(xx1));
- xx12 = vmlaq_f32(xx12, wk1iv, vrev64q_f32(x1_x3_add));
- xx22 = vmlaq_f32(xx22, wk3iv, vrev64q_f32(x1_x3_sub));
-
- vst1_f32(&a[j + 0], vget_low_f32(xx));
- vst1_f32(&a[j + 32], vget_high_f32(xx));
- vst1_f32(&a[j + 16], vget_low_f32(xx4));
- vst1_f32(&a[j + 48], vget_high_f32(xx4));
- vst1_f32(&a[j + 8], vget_low_f32(xx12));
- vst1_f32(&a[j + 40], vget_high_f32(xx12));
- vst1_f32(&a[j + 24], vget_low_f32(xx22));
- vst1_f32(&a[j + 56], vget_high_f32(xx22));
- }
- }
-}
-
-__inline static float32x4_t reverse_order_f32x4(float32x4_t in) {
- // A B C D -> C D A B
- const float32x4_t rev = vcombine_f32(vget_high_f32(in), vget_low_f32(in));
- // C D A B -> D C B A
- return vrev64q_f32(rev);
-}
-
-static void rftfsub_128_neon(float* a) {
- const float* c = rdft_w + 32;
- int j1, j2;
- const float32x4_t mm_half = vdupq_n_f32(0.5f);
-
- // Vectorized code (four at once).
- // Note: commented number are indexes for the first iteration of the loop.
- for (j1 = 1, j2 = 2; j2 + 7 < 64; j1 += 4, j2 += 8) {
- // Load 'wk'.
- const float32x4_t c_j1 = vld1q_f32(&c[j1]); // 1, 2, 3, 4,
- const float32x4_t c_k1 = vld1q_f32(&c[29 - j1]); // 28, 29, 30, 31,
- const float32x4_t wkrt = vsubq_f32(mm_half, c_k1); // 28, 29, 30, 31,
- const float32x4_t wkr_ = reverse_order_f32x4(wkrt); // 31, 30, 29, 28,
- const float32x4_t wki_ = c_j1; // 1, 2, 3, 4,
- // Load and shuffle 'a'.
- // 2, 4, 6, 8, 3, 5, 7, 9
- float32x4x2_t a_j2_p = vld2q_f32(&a[0 + j2]);
- // 120, 122, 124, 126, 121, 123, 125, 127,
- const float32x4x2_t k2_0_4 = vld2q_f32(&a[122 - j2]);
- // 126, 124, 122, 120
- const float32x4_t a_k2_p0 = reverse_order_f32x4(k2_0_4.val[0]);
- // 127, 125, 123, 121
- const float32x4_t a_k2_p1 = reverse_order_f32x4(k2_0_4.val[1]);
- // Calculate 'x'.
- const float32x4_t xr_ = vsubq_f32(a_j2_p.val[0], a_k2_p0);
- // 2-126, 4-124, 6-122, 8-120,
- const float32x4_t xi_ = vaddq_f32(a_j2_p.val[1], a_k2_p1);
- // 3-127, 5-125, 7-123, 9-121,
- // Calculate product into 'y'.
- // yr = wkr * xr - wki * xi;
- // yi = wkr * xi + wki * xr;
- const float32x4_t a_ = vmulq_f32(wkr_, xr_);
- const float32x4_t b_ = vmulq_f32(wki_, xi_);
- const float32x4_t c_ = vmulq_f32(wkr_, xi_);
- const float32x4_t d_ = vmulq_f32(wki_, xr_);
- const float32x4_t yr_ = vsubq_f32(a_, b_); // 2-126, 4-124, 6-122, 8-120,
- const float32x4_t yi_ = vaddq_f32(c_, d_); // 3-127, 5-125, 7-123, 9-121,
- // Update 'a'.
- // a[j2 + 0] -= yr;
- // a[j2 + 1] -= yi;
- // a[k2 + 0] += yr;
- // a[k2 + 1] -= yi;
- // 126, 124, 122, 120,
- const float32x4_t a_k2_p0n = vaddq_f32(a_k2_p0, yr_);
- // 127, 125, 123, 121,
- const float32x4_t a_k2_p1n = vsubq_f32(a_k2_p1, yi_);
- // Shuffle in right order and store.
- const float32x4_t a_k2_p0nr = vrev64q_f32(a_k2_p0n);
- const float32x4_t a_k2_p1nr = vrev64q_f32(a_k2_p1n);
- // 124, 125, 126, 127, 120, 121, 122, 123
- const float32x4x2_t a_k2_n = vzipq_f32(a_k2_p0nr, a_k2_p1nr);
- // 2, 4, 6, 8,
- a_j2_p.val[0] = vsubq_f32(a_j2_p.val[0], yr_);
- // 3, 5, 7, 9,
- a_j2_p.val[1] = vsubq_f32(a_j2_p.val[1], yi_);
- // 2, 3, 4, 5, 6, 7, 8, 9,
- vst2q_f32(&a[0 + j2], a_j2_p);
-
- vst1q_f32(&a[122 - j2], a_k2_n.val[1]);
- vst1q_f32(&a[126 - j2], a_k2_n.val[0]);
- }
-
- // Scalar code for the remaining items.
- for (; j2 < 64; j1 += 1, j2 += 2) {
- const int k2 = 128 - j2;
- const int k1 = 32 - j1;
- const float wkr = 0.5f - c[k1];
- const float wki = c[j1];
- const float xr = a[j2 + 0] - a[k2 + 0];
- const float xi = a[j2 + 1] + a[k2 + 1];
- const float yr = wkr * xr - wki * xi;
- const float yi = wkr * xi + wki * xr;
- a[j2 + 0] -= yr;
- a[j2 + 1] -= yi;
- a[k2 + 0] += yr;
- a[k2 + 1] -= yi;
- }
-}
-
-static void rftbsub_128_neon(float* a) {
- const float* c = rdft_w + 32;
- int j1, j2;
- const float32x4_t mm_half = vdupq_n_f32(0.5f);
-
- a[1] = -a[1];
- // Vectorized code (four at once).
- // Note: commented number are indexes for the first iteration of the loop.
- for (j1 = 1, j2 = 2; j2 + 7 < 64; j1 += 4, j2 += 8) {
- // Load 'wk'.
- const float32x4_t c_j1 = vld1q_f32(&c[j1]); // 1, 2, 3, 4,
- const float32x4_t c_k1 = vld1q_f32(&c[29 - j1]); // 28, 29, 30, 31,
- const float32x4_t wkrt = vsubq_f32(mm_half, c_k1); // 28, 29, 30, 31,
- const float32x4_t wkr_ = reverse_order_f32x4(wkrt); // 31, 30, 29, 28,
- const float32x4_t wki_ = c_j1; // 1, 2, 3, 4,
- // Load and shuffle 'a'.
- // 2, 4, 6, 8, 3, 5, 7, 9
- float32x4x2_t a_j2_p = vld2q_f32(&a[0 + j2]);
- // 120, 122, 124, 126, 121, 123, 125, 127,
- const float32x4x2_t k2_0_4 = vld2q_f32(&a[122 - j2]);
- // 126, 124, 122, 120
- const float32x4_t a_k2_p0 = reverse_order_f32x4(k2_0_4.val[0]);
- // 127, 125, 123, 121
- const float32x4_t a_k2_p1 = reverse_order_f32x4(k2_0_4.val[1]);
- // Calculate 'x'.
- const float32x4_t xr_ = vsubq_f32(a_j2_p.val[0], a_k2_p0);
- // 2-126, 4-124, 6-122, 8-120,
- const float32x4_t xi_ = vaddq_f32(a_j2_p.val[1], a_k2_p1);
- // 3-127, 5-125, 7-123, 9-121,
- // Calculate product into 'y'.
- // yr = wkr * xr - wki * xi;
- // yi = wkr * xi + wki * xr;
- const float32x4_t a_ = vmulq_f32(wkr_, xr_);
- const float32x4_t b_ = vmulq_f32(wki_, xi_);
- const float32x4_t c_ = vmulq_f32(wkr_, xi_);
- const float32x4_t d_ = vmulq_f32(wki_, xr_);
- const float32x4_t yr_ = vaddq_f32(a_, b_); // 2-126, 4-124, 6-122, 8-120,
- const float32x4_t yi_ = vsubq_f32(c_, d_); // 3-127, 5-125, 7-123, 9-121,
- // Update 'a'.
- // a[j2 + 0] -= yr;
- // a[j2 + 1] -= yi;
- // a[k2 + 0] += yr;
- // a[k2 + 1] -= yi;
- // 126, 124, 122, 120,
- const float32x4_t a_k2_p0n = vaddq_f32(a_k2_p0, yr_);
- // 127, 125, 123, 121,
- const float32x4_t a_k2_p1n = vsubq_f32(yi_, a_k2_p1);
- // Shuffle in right order and store.
- // 2, 3, 4, 5, 6, 7, 8, 9,
- const float32x4_t a_k2_p0nr = vrev64q_f32(a_k2_p0n);
- const float32x4_t a_k2_p1nr = vrev64q_f32(a_k2_p1n);
- // 124, 125, 126, 127, 120, 121, 122, 123
- const float32x4x2_t a_k2_n = vzipq_f32(a_k2_p0nr, a_k2_p1nr);
- // 2, 4, 6, 8,
- a_j2_p.val[0] = vsubq_f32(a_j2_p.val[0], yr_);
- // 3, 5, 7, 9,
- a_j2_p.val[1] = vsubq_f32(yi_, a_j2_p.val[1]);
- // 2, 3, 4, 5, 6, 7, 8, 9,
- vst2q_f32(&a[0 + j2], a_j2_p);
-
- vst1q_f32(&a[122 - j2], a_k2_n.val[1]);
- vst1q_f32(&a[126 - j2], a_k2_n.val[0]);
- }
-
- // Scalar code for the remaining items.
- for (; j2 < 64; j1 += 1, j2 += 2) {
- const int k2 = 128 - j2;
- const int k1 = 32 - j1;
- const float wkr = 0.5f - c[k1];
- const float wki = c[j1];
- const float xr = a[j2 + 0] - a[k2 + 0];
- const float xi = a[j2 + 1] + a[k2 + 1];
- const float yr = wkr * xr + wki * xi;
- const float yi = wkr * xi - wki * xr;
- a[j2 + 0] = a[j2 + 0] - yr;
- a[j2 + 1] = yi - a[j2 + 1];
- a[k2 + 0] = yr + a[k2 + 0];
- a[k2 + 1] = yi - a[k2 + 1];
- }
- a[65] = -a[65];
-}
-
-void aec_rdft_init_neon(void) {
- cft1st_128 = cft1st_128_neon;
- cftmdl_128 = cftmdl_128_neon;
- rftfsub_128 = rftfsub_128_neon;
- rftbsub_128 = rftbsub_128_neon;
-}
-
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