mirror of
https://github.com/bluekitchen/btstack.git
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282 lines
9.0 KiB
C
282 lines
9.0 KiB
C
/******************************************************************************
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*
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* Copyright 2022 Google LLC
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at:
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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******************************************************************************/
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#if __ARM_NEON && __ARM_ARCH_ISA_A64 && \
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!defined(TEST_ARM) || defined(TEST_NEON)
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#ifndef TEST_NEON
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#include <arm_neon.h>
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#endif /* TEST_NEON */
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/**
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* Import
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*/
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static inline int32_t filter_hp50(struct lc3_ltpf_hp50_state *, int32_t);
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/**
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* Resample from 16 Khz to 12.8 KHz
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*/
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#ifndef resample_16k_12k8
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LC3_HOT static void neon_resample_16k_12k8(
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struct lc3_ltpf_hp50_state *hp50, const int16_t *x, int16_t *y, int n)
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{
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static const int16_t h[4][20] = {
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{ -61, 214, -398, 417, 0, -1052, 2686, -4529, 5997, 26233,
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5997, -4529, 2686, -1052, 0, 417, -398, 214, -61, 0 },
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{ -79, 180, -213, 0, 598, -1522, 2389, -2427, 0, 24506,
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13068, -5289, 1873, 0, -752, 763, -457, 156, 0, -28 },
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{ -61, 92, 0, -323, 861, -1361, 1317, 0, -3885, 19741,
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19741, -3885, 0, 1317, -1361, 861, -323, 0, 92, -61 },
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{ -28, 0, 156, -457, 763, -752, 0, 1873, -5289, 13068,
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24506, 0, -2427, 2389, -1522, 598, 0, -213, 180, -79 },
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};
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x -= 20 - 1;
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for (int i = 0; i < 5*n; i += 5) {
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const int16_t *hn = h[i & 3];
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const int16_t *xn = x + (i >> 2);
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int32x4_t un;
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un = vmull_s16( vld1_s16(xn), vld1_s16(hn)), xn += 4, hn += 4;
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un = vmlal_s16(un, vld1_s16(xn), vld1_s16(hn)), xn += 4, hn += 4;
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un = vmlal_s16(un, vld1_s16(xn), vld1_s16(hn)), xn += 4, hn += 4;
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un = vmlal_s16(un, vld1_s16(xn), vld1_s16(hn)), xn += 4, hn += 4;
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un = vmlal_s16(un, vld1_s16(xn), vld1_s16(hn)), xn += 4, hn += 4;
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int32_t yn = filter_hp50(hp50, vaddvq_s32(un));
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*(y++) = (yn + (1 << 15)) >> 16;
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}
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}
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#ifndef TEST_NEON
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#define resample_16k_12k8 neon_resample_16k_12k8
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#endif
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#endif /* resample_16k_12k8 */
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/**
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* Resample from 32 Khz to 12.8 KHz
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*/
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#ifndef resample_32k_12k8
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LC3_HOT static void neon_resample_32k_12k8(
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struct lc3_ltpf_hp50_state *hp50, const int16_t *x, int16_t *y, int n)
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{
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x -= 40 - 1;
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static const int16_t h[2][40] = {
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{ -30, -31, 46, 107, 0, -199, -162, 209, 430, 0,
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-681, -526, 658, 1343, 0, -2264, -1943, 2999, 9871, 13116,
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9871, 2999, -1943, -2264, 0, 1343, 658, -526, -681, 0,
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430, 209, -162, -199, 0, 107, 46, -31, -30, 0 },
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{ -14, -39, 0, 90, 78, -106, -229, 0, 382, 299,
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-376, -761, 0, 1194, 937, -1214, -2644, 0, 6534, 12253,
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12253, 6534, 0, -2644, -1214, 937, 1194, 0, -761, -376,
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299, 382, 0, -229, -106, 78, 90, 0, -39, -14 },
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};
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for (int i = 0; i < 5*n; i += 5) {
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const int16_t *hn = h[i & 1];
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const int16_t *xn = x + (i >> 1);
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int32x4_t un = vmull_s16(vld1_s16(xn), vld1_s16(hn));
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xn += 4, hn += 4;
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for (int i = 1; i < 10; i++)
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un = vmlal_s16(un, vld1_s16(xn), vld1_s16(hn)), xn += 4, hn += 4;
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int32_t yn = filter_hp50(hp50, vaddvq_s32(un));
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*(y++) = (yn + (1 << 15)) >> 16;
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}
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}
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#ifndef TEST_NEON
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#define resample_32k_12k8 neon_resample_32k_12k8
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#endif
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#endif /* resample_32k_12k8 */
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/**
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* Resample from 48 Khz to 12.8 KHz
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*/
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#ifndef resample_48k_12k8
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LC3_HOT static void neon_resample_48k_12k8(
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struct lc3_ltpf_hp50_state *hp50, const int16_t *x, int16_t *y, int n)
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{
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static const int16_t alignas(16) h[4][64] = {
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{ -13, -25, -20, 10, 51, 71, 38, -47, -133, -145,
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-42, 139, 277, 242, 0, -329, -511, -351, 144, 698,
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895, 450, -535, -1510, -1697, -521, 1999, 5138, 7737, 8744,
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7737, 5138, 1999, -521, -1697, -1510, -535, 450, 895, 698,
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144, -351, -511, -329, 0, 242, 277, 139, -42, -145,
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-133, -47, 38, 71, 51, 10, -20, -25, -13, 0 },
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{ -9, -23, -24, 0, 41, 71, 52, -23, -115, -152,
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-78, 92, 254, 272, 76, -251, -493, -427, 0, 576,
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900, 624, -262, -1309, -1763, -954, 1272, 4356, 7203, 8679,
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8169, 5886, 2767, 0, -1542, -1660, -809, 240, 848, 796,
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292, -252, -507, -398, -82, 199, 288, 183, 0, -130,
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-145, -71, 20, 69, 60, 20, -15, -26, -17, -3 },
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{ -6, -20, -26, -8, 31, 67, 62, 0, -94, -152,
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-108, 45, 223, 287, 143, -167, -454, -480, -134, 439,
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866, 758, 0, -1071, -1748, -1295, 601, 3559, 6580, 8485,
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8485, 6580, 3559, 601, -1295, -1748, -1071, 0, 758, 866,
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439, -134, -480, -454, -167, 143, 287, 223, 45, -108,
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-152, -94, 0, 62, 67, 31, -8, -26, -20, -6 },
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{ -3, -17, -26, -15, 20, 60, 69, 20, -71, -145,
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-130, 0, 183, 288, 199, -82, -398, -507, -252, 292,
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796, 848, 240, -809, -1660, -1542, 0, 2767, 5886, 8169,
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8679, 7203, 4356, 1272, -954, -1763, -1309, -262, 624, 900,
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576, 0, -427, -493, -251, 76, 272, 254, 92, -78,
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-152, -115, -23, 52, 71, 41, 0, -24, -23, -9 },
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};
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x -= 60 - 1;
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for (int i = 0; i < 15*n; i += 15) {
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const int16_t *hn = h[i & 3];
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const int16_t *xn = x + (i >> 2);
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int32x4_t un = vmull_s16(vld1_s16(xn), vld1_s16(hn));
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xn += 4, hn += 4;
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for (int i = 1; i < 15; i++)
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un = vmlal_s16(un, vld1_s16(xn), vld1_s16(hn)), xn += 4, hn += 4;
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int32_t yn = filter_hp50(hp50, vaddvq_s32(un));
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*(y++) = (yn + (1 << 15)) >> 16;
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}
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}
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#ifndef TEST_NEON
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#define resample_48k_12k8 neon_resample_48k_12k8
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#endif
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#endif /* resample_48k_12k8 */
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/**
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* Return dot product of 2 vectors
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*/
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#ifndef dot
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LC3_HOT static inline float neon_dot(const int16_t *a, const int16_t *b, int n)
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{
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int64x2_t v = vmovq_n_s64(0);
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for (int i = 0; i < (n >> 4); i++) {
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int32x4_t u;
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u = vmull_s16( vld1_s16(a), vld1_s16(b)), a += 4, b += 4;
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u = vmlal_s16(u, vld1_s16(a), vld1_s16(b)), a += 4, b += 4;
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v = vpadalq_s32(v, u);
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u = vmull_s16( vld1_s16(a), vld1_s16(b)), a += 4, b += 4;
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u = vmlal_s16(u, vld1_s16(a), vld1_s16(b)), a += 4, b += 4;
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v = vpadalq_s32(v, u);
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}
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int32_t v32 = (vaddvq_s64(v) + (1 << 5)) >> 6;
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return (float)v32;
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}
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#ifndef TEST_NEON
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#define dot neon_dot
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#endif
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#endif /* dot */
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/**
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* Return vector of correlations
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*/
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#ifndef correlate
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LC3_HOT static void neon_correlate(
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const int16_t *a, const int16_t *b, int n, float *y, int nc)
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{
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for ( ; nc >= 4; nc -= 4, b -= 4) {
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const int16_t *an = (const int16_t *)a;
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const int16_t *bn = (const int16_t *)b;
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int64x2_t v0 = vmovq_n_s64(0), v1 = v0, v2 = v0, v3 = v0;
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int16x4_t ax, b0, b1;
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b0 = vld1_s16(bn-4);
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for (int i=0; i < (n >> 4); i++ )
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for (int j = 0; j < 2; j++) {
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int32x4_t u0, u1, u2, u3;
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b1 = b0;
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b0 = vld1_s16(bn), bn += 4;
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ax = vld1_s16(an), an += 4;
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u0 = vmull_s16(ax, b0);
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u1 = vmull_s16(ax, vext_s16(b1, b0, 3));
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u2 = vmull_s16(ax, vext_s16(b1, b0, 2));
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u3 = vmull_s16(ax, vext_s16(b1, b0, 1));
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b1 = b0;
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b0 = vld1_s16(bn), bn += 4;
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ax = vld1_s16(an), an += 4;
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u0 = vmlal_s16(u0, ax, b0);
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u1 = vmlal_s16(u1, ax, vext_s16(b1, b0, 3));
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u2 = vmlal_s16(u2, ax, vext_s16(b1, b0, 2));
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u3 = vmlal_s16(u3, ax, vext_s16(b1, b0, 1));
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v0 = vpadalq_s32(v0, u0);
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v1 = vpadalq_s32(v1, u1);
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v2 = vpadalq_s32(v2, u2);
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v3 = vpadalq_s32(v3, u3);
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}
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*(y++) = (float)((int32_t)((vaddvq_s64(v0) + (1 << 5)) >> 6));
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*(y++) = (float)((int32_t)((vaddvq_s64(v1) + (1 << 5)) >> 6));
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*(y++) = (float)((int32_t)((vaddvq_s64(v2) + (1 << 5)) >> 6));
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*(y++) = (float)((int32_t)((vaddvq_s64(v3) + (1 << 5)) >> 6));
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}
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for ( ; nc > 0; nc--)
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*(y++) = neon_dot(a, b--, n);
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}
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#endif /* correlate */
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#ifndef TEST_NEON
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#define correlate neon_correlate
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#endif
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#endif /* __ARM_NEON && __ARM_ARCH_ISA_A64 */
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