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