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/*
* Copyright (c) 2011 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.
*/
#include "aecm_core.h"
#include <arm_neon.h>
#include <assert.h>
// Square root of Hanning window in Q14.
static const WebRtc_Word16 kSqrtHanningReversed[] __attribute__((aligned(8))) = {
16384, 16373, 16354, 16325,
16286, 16237, 16179, 16111,
16034, 15947, 15851, 15746,
15631, 15506, 15373, 15231,
15079, 14918, 14749, 14571,
14384, 14189, 13985, 13773,
13553, 13325, 13089, 12845,
12594, 12335, 12068, 11795,
11514, 11227, 10933, 10633,
10326, 10013, 9695, 9370,
9040, 8705, 8364, 8019,
7668, 7313, 6954, 6591,
6224, 5853, 5478, 5101,
4720, 4337, 3951, 3562,
3172, 2780, 2386, 1990,
1594, 1196, 798, 399
};
static void WindowAndFFTNeon(WebRtc_Word16* fft,
const WebRtc_Word16* time_signal,
complex16_t* freq_signal,
int time_signal_scaling) {
int i, j;
int16x4_t tmp16x4_scaling = vdup_n_s16(time_signal_scaling);
__asm__("vmov.i16 d21, #0" ::: "d21");
for (i = 0, j = 0; i < PART_LEN; i += 4, j += 8) {
int16x4_t tmp16x4_0;
int16x4_t tmp16x4_1;
int32x4_t tmp32x4_0;
/* Window near end */
// fft[j] = (WebRtc_Word16)WEBRTC_SPL_MUL_16_16_RSFT((time_signal[i]
// << time_signal_scaling), WebRtcAecm_kSqrtHanning[i], 14);
__asm__("vld1.16 %P0, [%1, :64]" : "=w"(tmp16x4_0) : "r"(&time_signal[i]));
tmp16x4_0 = vshl_s16(tmp16x4_0, tmp16x4_scaling);
__asm__("vld1.16 %P0, [%1, :64]" : "=w"(tmp16x4_1) : "r"(&WebRtcAecm_kSqrtHanning[i]));
tmp32x4_0 = vmull_s16(tmp16x4_0, tmp16x4_1);
__asm__("vshrn.i32 d20, %q0, #14" : : "w"(tmp32x4_0) : "d20");
__asm__("vst2.16 {d20, d21}, [%0, :128]" : : "r"(&fft[j]) : "q10");
// fft[PART_LEN2 + j] = (WebRtc_Word16)WEBRTC_SPL_MUL_16_16_RSFT(
// (time_signal[PART_LEN + i] << time_signal_scaling),
// WebRtcAecm_kSqrtHanning[PART_LEN - i], 14);
__asm__("vld1.16 %P0, [%1, :64]" : "=w"(tmp16x4_0) : "r"(&time_signal[i + PART_LEN]));
tmp16x4_0 = vshl_s16(tmp16x4_0, tmp16x4_scaling);
__asm__("vld1.16 %P0, [%1, :64]" : "=w"(tmp16x4_1) : "r"(&kSqrtHanningReversed[i]));
tmp32x4_0 = vmull_s16(tmp16x4_0, tmp16x4_1);
__asm__("vshrn.i32 d20, %q0, #14" : : "w"(tmp32x4_0) : "d20");
__asm__("vst2.16 {d20, d21}, [%0, :128]" : : "r"(&fft[PART_LEN2 + j]) : "q10");
}
WebRtcSpl_ComplexBitReverse(fft, PART_LEN_SHIFT);
WebRtcSpl_ComplexFFT(fft, PART_LEN_SHIFT, 1);
// Take only the first PART_LEN2 samples, and switch the sign of the imaginary part.
for (i = 0, j = 0; j < PART_LEN2; i += 8, j += 16) {
__asm__("vld2.16 {d20, d21, d22, d23}, [%0, :256]" : : "r"(&fft[j]) : "q10", "q11");
__asm__("vneg.s16 d22, d22" : : : "q10");
__asm__("vneg.s16 d23, d23" : : : "q11");
__asm__("vst2.16 {d20, d21, d22, d23}, [%0, :256]" : :
"r"(&freq_signal[i].real): "q10", "q11");
}
}
static void InverseFFTAndWindowNeon(AecmCore_t* aecm,
WebRtc_Word16* fft,
complex16_t* efw,
WebRtc_Word16* output,
const WebRtc_Word16* nearendClean) {
int i, j, outCFFT;
WebRtc_Word32 tmp32no1;
// Synthesis
for (i = 0, j = 0; i < PART_LEN; i += 4, j += 8) {
// We overwrite two more elements in fft[], but it's ok.
__asm__("vld2.16 {d20, d21}, [%0, :128]" : : "r"(&(efw[i].real)) : "q10");
__asm__("vmov q11, q10" : : : "q10", "q11");
__asm__("vneg.s16 d23, d23" : : : "q11");
__asm__("vst2.16 {d22, d23}, [%0, :128]" : : "r"(&fft[j]): "q11");
__asm__("vrev64.16 q10, q10" : : : "q10");
__asm__("vst2.16 {d20, d21}, [%0]" : : "r"(&fft[PART_LEN4 - j - 6]): "q10");
}
fft[PART_LEN2] = efw[PART_LEN].real;
fft[PART_LEN2 + 1] = -efw[PART_LEN].imag;
// Inverse FFT, result should be scaled with outCFFT.
WebRtcSpl_ComplexBitReverse(fft, PART_LEN_SHIFT);
outCFFT = WebRtcSpl_ComplexIFFT(fft, PART_LEN_SHIFT, 1);
// Take only the real values and scale with outCFFT.
for (i = 0, j = 0; i < PART_LEN2; i += 8, j += 16) {
__asm__("vld2.16 {d20, d21, d22, d23}, [%0, :256]" : : "r"(&fft[j]) : "q10", "q11");
__asm__("vst1.16 {d20, d21}, [%0, :128]" : : "r"(&fft[i]): "q10");
}
int32x4_t tmp32x4_2;
__asm__("vdup.32 %q0, %1" : "=w"(tmp32x4_2) : "r"((WebRtc_Word32)
(outCFFT - aecm->dfaCleanQDomain)));
for (i = 0; i < PART_LEN; i += 4) {
int16x4_t tmp16x4_0;
int16x4_t tmp16x4_1;
int32x4_t tmp32x4_0;
int32x4_t tmp32x4_1;
// fft[i] = (WebRtc_Word16)WEBRTC_SPL_MUL_16_16_RSFT_WITH_ROUND(
// fft[i], WebRtcAecm_kSqrtHanning[i], 14);
__asm__("vld1.16 %P0, [%1, :64]" : "=w"(tmp16x4_0) : "r"(&fft[i]));
__asm__("vld1.16 %P0, [%1, :64]" : "=w"(tmp16x4_1) : "r"(&WebRtcAecm_kSqrtHanning[i]));
__asm__("vmull.s16 %q0, %P1, %P2" : "=w"(tmp32x4_0) : "w"(tmp16x4_0), "w"(tmp16x4_1));
__asm__("vrshr.s32 %q0, %q1, #14" : "=w"(tmp32x4_0) : "0"(tmp32x4_0));
// tmp32no1 = WEBRTC_SPL_SHIFT_W32((WebRtc_Word32)fft[i],
// outCFFT - aecm->dfaCleanQDomain);
__asm__("vshl.s32 %q0, %q1, %q2" : "=w"(tmp32x4_0) : "0"(tmp32x4_0), "w"(tmp32x4_2));
// fft[i] = (WebRtc_Word16)WEBRTC_SPL_SAT(WEBRTC_SPL_WORD16_MAX,
// tmp32no1 + outBuf[i], WEBRTC_SPL_WORD16_MIN);
// output[i] = fft[i];
__asm__("vld1.16 %P0, [%1, :64]" : "=w"(tmp16x4_0) : "r"(&aecm->outBuf[i]));
__asm__("vmovl.s16 %q0, %P1" : "=w"(tmp32x4_1) : "w"(tmp16x4_0));
__asm__("vadd.i32 %q0, %q1" : : "w"(tmp32x4_0), "w"(tmp32x4_1));
__asm__("vqshrn.s32 %P0, %q1, #0" : "=w"(tmp16x4_0) : "w"(tmp32x4_0));
__asm__("vst1.16 %P0, [%1, :64]" : : "w"(tmp16x4_0), "r"(&fft[i]));
__asm__("vst1.16 %P0, [%1, :64]" : : "w"(tmp16x4_0), "r"(&output[i]));
// tmp32no1 = WEBRTC_SPL_MUL_16_16_RSFT(
// fft[PART_LEN + i], WebRtcAecm_kSqrtHanning[PART_LEN - i], 14);
__asm__("vld1.16 %P0, [%1, :64]" : "=w"(tmp16x4_0) : "r"(&fft[PART_LEN + i]));
__asm__("vld1.16 %P0, [%1, :64]" : "=w"(tmp16x4_1) : "r"(&kSqrtHanningReversed[i]));
__asm__("vmull.s16 %q0, %P1, %P2" : "=w"(tmp32x4_0) : "w"(tmp16x4_0), "w"(tmp16x4_1));
__asm__("vshr.s32 %q0, %q1, #14" : "=w"(tmp32x4_0) : "0"(tmp32x4_0));
// tmp32no1 = WEBRTC_SPL_SHIFT_W32(tmp32no1, outCFFT - aecm->dfaCleanQDomain);
__asm__("vshl.s32 %q0, %q1, %q2" : "=w"(tmp32x4_0) : "0"(tmp32x4_0), "w"(tmp32x4_2));
// outBuf[i] = (WebRtc_Word16)WEBRTC_SPL_SAT(
// WEBRTC_SPL_WORD16_MAX, tmp32no1, WEBRTC_SPL_WORD16_MIN);
__asm__("vqshrn.s32 %P0, %q1, #0" : "=w"(tmp16x4_0) : "w"(tmp32x4_0));
__asm__("vst1.16 %P0, [%1, :64]" : : "w"(tmp16x4_0), "r"(&aecm->outBuf[i]));
}
// Copy the current block to the old position (outBuf is shifted elsewhere).
for (i = 0; i < PART_LEN; i += 16) {
__asm__("vld1.16 {d20, d21, d22, d23}, [%0, :256]" : :
"r"(&aecm->xBuf[i + PART_LEN]) : "q10");
__asm__("vst1.16 {d20, d21, d22, d23}, [%0, :256]" : : "r"(&aecm->xBuf[i]): "q10");
}
for (i = 0; i < PART_LEN; i += 16) {
__asm__("vld1.16 {d20, d21, d22, d23}, [%0, :256]" : :
"r"(&aecm->dBufNoisy[i + PART_LEN]) : "q10");
__asm__("vst1.16 {d20, d21, d22, d23}, [%0, :256]" : :
"r"(&aecm->dBufNoisy[i]): "q10");
}
if (nearendClean != NULL) {
for (i = 0; i < PART_LEN; i += 16) {
__asm__("vld1.16 {d20, d21, d22, d23}, [%0, :256]" : :
"r"(&aecm->dBufClean[i + PART_LEN]) : "q10");
__asm__("vst1.16 {d20, d21, d22, d23}, [%0, :256]" : :
"r"(&aecm->dBufClean[i]): "q10");
}
}
}
static void CalcLinearEnergiesNeon(AecmCore_t* aecm,
const WebRtc_UWord16* far_spectrum,
WebRtc_Word32* echo_est,
WebRtc_UWord32* far_energy,
WebRtc_UWord32* echo_energy_adapt,
WebRtc_UWord32* echo_energy_stored) {
int i;
register WebRtc_UWord32 far_energy_r;
register WebRtc_UWord32 echo_energy_stored_r;
register WebRtc_UWord32 echo_energy_adapt_r;
uint32x4_t tmp32x4_0;
__asm__("vmov.i32 q14, #0" : : : "q14"); // far_energy
__asm__("vmov.i32 q8, #0" : : : "q8"); // echo_energy_stored
__asm__("vmov.i32 q9, #0" : : : "q9"); // echo_energy_adapt
for (i = 0; i < PART_LEN - 7; i += 8) {
// far_energy += (WebRtc_UWord32)(far_spectrum[i]);
__asm__("vld1.16 {d26, d27}, [%0]" : : "r"(&far_spectrum[i]) : "q13");
__asm__("vaddw.u16 q14, q14, d26" : : : "q14", "q13");
__asm__("vaddw.u16 q14, q14, d27" : : : "q14", "q13");
// Get estimated echo energies for adaptive channel and stored channel.
// echoEst[i] = WEBRTC_SPL_MUL_16_U16(aecm->channelStored[i], far_spectrum[i]);
__asm__("vld1.16 {d24, d25}, [%0, :128]" : : "r"(&aecm->channelStored[i]) : "q12");
__asm__("vmull.u16 q10, d26, d24" : : : "q12", "q13", "q10");
__asm__("vmull.u16 q11, d27, d25" : : : "q12", "q13", "q11");
__asm__("vst1.32 {d20, d21, d22, d23}, [%0, :256]" : : "r"(&echo_est[i]):
"q10", "q11");
// echo_energy_stored += (WebRtc_UWord32)echoEst[i];
__asm__("vadd.u32 q8, q10" : : : "q10", "q8");
__asm__("vadd.u32 q8, q11" : : : "q11", "q8");
// echo_energy_adapt += WEBRTC_SPL_UMUL_16_16(
// aecm->channelAdapt16[i], far_spectrum[i]);
__asm__("vld1.16 {d24, d25}, [%0, :128]" : : "r"(&aecm->channelAdapt16[i]) : "q12");
__asm__("vmull.u16 q10, d26, d24" : : : "q12", "q13", "q10");
__asm__("vmull.u16 q11, d27, d25" : : : "q12", "q13", "q11");
__asm__("vadd.u32 q9, q10" : : : "q9", "q15");
__asm__("vadd.u32 q9, q11" : : : "q9", "q11");
}
__asm__("vadd.u32 d28, d29" : : : "q14");
__asm__("vpadd.u32 d28, d28" : : : "q14");
__asm__("vmov.32 %0, d28[0]" : "=r"(far_energy_r): : "q14");
__asm__("vadd.u32 d18, d19" : : : "q9");
__asm__("vpadd.u32 d18, d18" : : : "q9");
__asm__("vmov.32 %0, d18[0]" : "=r"(echo_energy_adapt_r): : "q9");
__asm__("vadd.u32 d16, d17" : : : "q8");
__asm__("vpadd.u32 d16, d16" : : : "q8");
__asm__("vmov.32 %0, d16[0]" : "=r"(echo_energy_stored_r): : "q8");
// Get estimated echo energies for adaptive channel and stored channel.
echo_est[i] = WEBRTC_SPL_MUL_16_U16(aecm->channelStored[i], far_spectrum[i]);
*echo_energy_stored = echo_energy_stored_r + (WebRtc_UWord32)echo_est[i];
*far_energy = far_energy_r + (WebRtc_UWord32)(far_spectrum[i]);
*echo_energy_adapt = echo_energy_adapt_r + WEBRTC_SPL_UMUL_16_16(
aecm->channelAdapt16[i], far_spectrum[i]);
}
static void StoreAdaptiveChannelNeon(AecmCore_t* aecm,
const WebRtc_UWord16* far_spectrum,
WebRtc_Word32* echo_est) {
int i;
// During startup we store the channel every block.
// Recalculate echo estimate.
for (i = 0; i < PART_LEN - 7; i += 8) {
// aecm->channelStored[i] = acem->channelAdapt16[i];
// echo_est[i] = WEBRTC_SPL_MUL_16_U16(aecm->channelStored[i], far_spectrum[i]);
__asm__("vld1.16 {d26, d27}, [%0]" : : "r"(&far_spectrum[i]) : "q13");
__asm__("vld1.16 {d24, d25}, [%0, :128]" : : "r"(&aecm->channelAdapt16[i]) : "q12");
__asm__("vst1.16 {d24, d25}, [%0, :128]" : : "r"(&aecm->channelStored[i]) : "q12");
__asm__("vmull.u16 q10, d26, d24" : : : "q12", "q13", "q10");
__asm__("vmull.u16 q11, d27, d25" : : : "q12", "q13", "q11");
__asm__("vst1.16 {d20, d21, d22, d23}, [%0, :256]" : :
"r"(&echo_est[i]) : "q10", "q11");
}
aecm->channelStored[i] = aecm->channelAdapt16[i];
echo_est[i] = WEBRTC_SPL_MUL_16_U16(aecm->channelStored[i], far_spectrum[i]);
}
static void ResetAdaptiveChannelNeon(AecmCore_t* aecm) {
int i;
for (i = 0; i < PART_LEN - 7; i += 8) {
// aecm->channelAdapt16[i] = aecm->channelStored[i];
// aecm->channelAdapt32[i] = WEBRTC_SPL_LSHIFT_W32((WebRtc_Word32)
// aecm->channelStored[i], 16);
__asm__("vld1.16 {d24, d25}, [%0, :128]" : :
"r"(&aecm->channelStored[i]) : "q12");
__asm__("vst1.16 {d24, d25}, [%0, :128]" : :
"r"(&aecm->channelAdapt16[i]) : "q12");
__asm__("vshll.s16 q10, d24, #16" : : : "q12", "q13", "q10");
__asm__("vshll.s16 q11, d25, #16" : : : "q12", "q13", "q11");
__asm__("vst1.16 {d20, d21, d22, d23}, [%0, :256]" : :
"r"(&aecm->channelAdapt32[i]): "q10", "q11");
}
aecm->channelAdapt16[i] = aecm->channelStored[i];
aecm->channelAdapt32[i] = WEBRTC_SPL_LSHIFT_W32(
(WebRtc_Word32)aecm->channelStored[i], 16);
}
void WebRtcAecm_InitNeon(void) {
WebRtcAecm_WindowAndFFT = WindowAndFFTNeon;
WebRtcAecm_InverseFFTAndWindow = InverseFFTAndWindowNeon;
WebRtcAecm_CalcLinearEnergies = CalcLinearEnergiesNeon;
WebRtcAecm_StoreAdaptiveChannel = StoreAdaptiveChannelNeon;
WebRtcAecm_ResetAdaptiveChannel = ResetAdaptiveChannelNeon;
}
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