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/***
This file is part of PulseAudio.
Copyright 2013 Peter Meerwald <pmeerw@pmeerw.net>
PulseAudio is free software; you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published
by the Free Software Foundation; either version 2.1 of the License,
or (at your option) any later version.
PulseAudio is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
General Public License for more details.
***/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <pulsecore/macro.h>
#include <pulsecore/endianmacros.h>
#include <pulsecore/sample-util.h>
#include "cpu-arm.h"
#include "mix.h"
#include <arm_neon.h>
static pa_do_mix_func_t fallback;
/* special case: mix s16ne streams, 2 channels each */
static void pa_mix_ch2_s16ne_neon(pa_mix_info streams[], unsigned nstreams, uint8_t *data, unsigned length) {
const unsigned mask = sizeof(int16_t) * 8 - 1;
const uint8_t *end = data + (length & ~mask);
while (data < end) {
int32x4_t sum0, sum1;
unsigned i;
__asm__ __volatile__ (
"veor.s32 %q[sum0], %q[sum0] \n\t"
"veor.s32 %q[sum1], %q[sum1] \n\t"
: [sum0] "=w" (sum0), [sum1] "=w" (sum1)
:
: "cc" /* clobber list */
);
for (i = 0; i < nstreams; i++) {
pa_mix_info *m = streams + i;
int32_t cv0 = m->linear[0].i;
int32_t cv1 = m->linear[1].i;
__asm__ __volatile__ (
"vld2.s16 {d0,d2}, [%[ptr]]! \n\t"
"vmov.s32 d4[0], %[cv0] \n\t"
"vmov.s32 d4[1], %[cv1] \n\t"
"vshll.s16 q0, d0, #15 \n\t"
"vshll.s16 q1, d2, #15 \n\t"
"vqdmulh.s32 q0, q0, d4[0] \n\t"
"vqdmulh.s32 q1, q1, d4[1] \n\t"
"vqadd.s32 %q[sum0], %q[sum0], q0 \n\t"
"vqadd.s32 %q[sum1], %q[sum1], q1 \n\t"
: [ptr] "+r" (m->ptr), [sum0] "+w" (sum0), [sum1] "+w" (sum1)
: [cv0] "r" (cv0), [cv1] "r" (cv1)
: "memory", "cc", "q0", "q1", "d4" /* clobber list */
);
}
__asm__ __volatile__ (
"vqmovn.s32 d0, %q[sum0] \n\t"
"vqmovn.s32 d1, %q[sum1] \n\t"
"vst2.s16 {d0,d1}, [%[data]]! \n\t"
: [data] "+r" (data)
: [sum0] "w" (sum0), [sum1] "w" (sum1)
: "memory", "cc", "q0" /* clobber list */
);
}
fallback(streams, nstreams, 2, data, length & mask);
}
/* special case: mix 2 s16ne streams, 1 channel each */
static void pa_mix2_ch1_s16ne_neon(pa_mix_info streams[], int16_t *data, unsigned length) {
const int16_t *ptr0 = streams[0].ptr;
const int16_t *ptr1 = streams[1].ptr;
int32x4_t sv0, sv1;
__asm__ __volatile__ (
"vdup.s32 %q[sv0], %[lin0] \n\t"
"vdup.s32 %q[sv1], %[lin1] \n\t"
: [sv0] "=w" (sv0), [sv1] "=w" (sv1)
: [lin0] "r" (streams[0].linear[0]), [lin1] "r" (streams[1].linear[0])
: /* clobber list */
);
length /= sizeof(int16_t);
for (; length >= 4; length -= 4) {
__asm__ __volatile__ (
"vld1.s16 d0, [%[ptr0]]! \n\t"
"vld1.s16 d2, [%[ptr1]]! \n\t"
"vshll.s16 q0, d0, #15 \n\t"
"vshll.s16 q1, d2, #15 \n\t"
"vqdmulh.s32 q0, q0, %q[sv0] \n\t"
"vqdmulh.s32 q1, q1, %q[sv1] \n\t"
"vqadd.s32 q0, q0, q1 \n\t"
"vqmovn.s32 d0, q0 \n\t"
"vst1.s16 d0, [%[data]]! \n\t"
: [ptr0] "+r" (ptr0), [ptr1] "+r" (ptr1), [data] "+r" (data)
: [sv0] "w" (sv0), [sv1] "w" (sv1)
: "memory", "cc", "q0", "q1" /* clobber list */
);
}
for (; length > 0; length--) {
int32_t sum = pa_mult_s16_volume(*ptr0++, streams[0].linear[0].i);
sum += pa_mult_s16_volume(*ptr1++, streams[1].linear[0].i);
*data++ = PA_CLAMP_UNLIKELY(sum, -0x8000, 0x7FFF);
}
}
/* special case: mix 2 s16ne streams, 2 channel each */
static void pa_mix2_ch2_s16ne_neon(pa_mix_info streams[], int16_t *data, unsigned length) {
const int16_t *ptr0 = streams[0].ptr;
const int16_t *ptr1 = streams[1].ptr;
int32x4_t sv0, sv1;
__asm__ __volatile__ (
"vld1.s32 d0, [%[lin0]] \n\t"
"vmov.s32 d1, d0 \n\t"
"vmov.s32 %q[sv0], q0 \n\t"
"vld1.s32 d0, [%[lin1]] \n\t"
"vmov.s32 d1, d0 \n\t"
"vmov.s32 %q[sv1], q0 \n\t"
: [sv0] "=w" (sv0), [sv1] "=w" (sv1)
: [lin0] "r" (streams[0].linear), [lin1] "r" (streams[1].linear)
: "q0" /* clobber list */
);
length /= sizeof(int16_t);
for (; length >= 4; length -= 4) {
__asm__ __volatile__ (
"vld1.s16 d0, [%[ptr0]]! \n\t"
"vld1.s16 d2, [%[ptr1]]! \n\t"
"vshll.s16 q0, d0, #15 \n\t"
"vshll.s16 q1, d2, #15 \n\t"
"vqdmulh.s32 q0, q0, %q[sv0] \n\t"
"vqdmulh.s32 q1, q1, %q[sv1] \n\t"
"vqadd.s32 q0, q0, q1 \n\t"
"vqmovn.s32 d0, q0 \n\t"
"vst1.s16 d0, [%[data]]! \n\t"
: [ptr0] "+r" (ptr0), [ptr1] "+r" (ptr1), [data] "+r" (data)
: [sv0] "w" (sv0), [sv1] "w" (sv1)
: "memory", "cc", "q0", "q1" /* clobber list */
);
}
if (length > 0) {
int32_t sum;
sum = pa_mult_s16_volume(*ptr0++, streams[0].linear[0].i);
sum += pa_mult_s16_volume(*ptr1++, streams[1].linear[0].i);
*data++ = PA_CLAMP_UNLIKELY(sum, -0x8000, 0x7FFF);
sum = pa_mult_s16_volume(*ptr0++, streams[0].linear[1].i);
sum += pa_mult_s16_volume(*ptr1++, streams[1].linear[1].i);
*data++ = PA_CLAMP_UNLIKELY(sum, -0x8000, 0x7FFF);
}
}
/* special case: mix 2 s16ne streams, 4 channels each */
static void pa_mix2_ch4_s16ne_neon(pa_mix_info streams[], int16_t *data, unsigned length) {
const int16_t *ptr0 = streams[0].ptr;
const int16_t *ptr1 = streams[1].ptr;
int32x4_t sv0, sv1;
__asm__ __volatile__ (
"vld1.s32 %h[sv0], [%[lin0]] \n\t"
"vld1.s32 %h[sv1], [%[lin1]] \n\t"
: [sv0] "=w" (sv0), [sv1] "=w" (sv1)
: [lin0] "r" (streams[0].linear), [lin1] "r" (streams[1].linear)
: /* clobber list */
);
length /= sizeof(int16_t);
for (; length >= 4; length -= 4) {
__asm__ __volatile__ (
"vld1.s16 d0, [%[ptr0]]! \n\t"
"vld1.s16 d2, [%[ptr1]]! \n\t"
"vshll.s16 q0, d0, #15 \n\t"
"vshll.s16 q1, d2, #15 \n\t"
"vqdmulh.s32 q0, q0, %q[sv0] \n\t"
"vqdmulh.s32 q1, q1, %q[sv1] \n\t"
"vqadd.s32 q0, q0, q1 \n\t"
"vqmovn.s32 d0, q0 \n\t"
"vst1.s16 d0, [%[data]]! \n\t"
: [ptr0] "+r" (ptr0), [ptr1] "+r" (ptr1), [data] "+r" (data)
: [sv0] "w" (sv0), [sv1] "w" (sv1)
: "memory", "cc", "q0", "q1" /* clobber list */
);
}
}
static void pa_mix_s16ne_neon(pa_mix_info streams[], unsigned nstreams, unsigned nchannels, void *data, unsigned length) {
if (nstreams == 2 && nchannels == 2)
pa_mix2_ch2_s16ne_neon(streams, data, length);
else if (nstreams == 2 && nchannels == 4)
pa_mix2_ch4_s16ne_neon(streams, data, length);
else if (nstreams == 2 && nchannels == 1)
pa_mix2_ch1_s16ne_neon(streams, data, length);
else if (nchannels == 2)
pa_mix_ch2_s16ne_neon(streams, nstreams, data, length);
else
fallback(streams, nstreams, nchannels, data, length);
}
void pa_mix_func_init_neon(pa_cpu_arm_flag_t flags) {
pa_log_info("Initialising ARM NEON optimized mixing functions.");
fallback = pa_get_mix_func(PA_SAMPLE_S16NE);
pa_set_mix_func(PA_SAMPLE_S16NE, (pa_do_mix_func_t) pa_mix_s16ne_neon);
}
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