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aarch64: NEON float to s16 audio conversion

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This commit is contained in:
Janne Grunau
2014-04-16 23:47:32 +02:00
parent ee2bc5974f
commit f4d5a2cc35
5 changed files with 419 additions and 0 deletions
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4
libavresample/aarch64/Makefile
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@@ -1 +1,5 @@
OBJS += aarch64/audio_convert_init.o
OBJS-$(CONFIG_NEON_CLOBBER_TEST) += aarch64/neontest.o
NEON-OBJS += aarch64/audio_convert_neon.o

49
libavresample/aarch64/audio_convert_init.c Normal file
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@@ -0,0 +1,49 @@
/*
* This file is part of Libav.
*
* Libav 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.
*
* Libav 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with Libav; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <stdint.h>
#include "config.h"
#include "libavutil/attributes.h"
#include "libavutil/cpu.h"
#include "libavutil/aarch64/cpu.h"
#include "libavutil/samplefmt.h"
#include "libavresample/audio_convert.h"
void ff_conv_flt_to_s16_neon(int16_t *dst, const float *src, int len);
void ff_conv_fltp_to_s16_neon(int16_t *dst, float *const *src,
int len, int channels);
void ff_conv_fltp_to_s16_2ch_neon(int16_t *dst, float *const *src,
int len, int channels);
av_cold void ff_audio_convert_init_aarch64(AudioConvert *ac)
{
int cpu_flags = av_get_cpu_flags();
if (have_neon(cpu_flags)) {
ff_audio_convert_set_func(ac, AV_SAMPLE_FMT_S16, AV_SAMPLE_FMT_FLT,
0, 16, 8, "NEON",
ff_conv_flt_to_s16_neon);
ff_audio_convert_set_func(ac, AV_SAMPLE_FMT_S16, AV_SAMPLE_FMT_FLTP,
2, 16, 8, "NEON",
ff_conv_fltp_to_s16_2ch_neon);
ff_audio_convert_set_func(ac, AV_SAMPLE_FMT_S16, AV_SAMPLE_FMT_FLTP,
0, 16, 8, "NEON",
ff_conv_fltp_to_s16_neon);
}
}

363
libavresample/aarch64/audio_convert_neon.S Normal file
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@@ -0,0 +1,363 @@
/*
* Copyright (c) 2008 Mans Rullgard <mans@mansr.com>
* Copyright (c) 2014 Janne Grunau <janne-libav@jannau.net>
*
* This file is part of Libav.
*
* Libav 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.
*
* Libav 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with Libav; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "config.h"
#include "libavutil/aarch64/asm.S"
function ff_conv_flt_to_s16_neon, export=1
subs x2, x2, #8
ld1 {v0.4s}, [x1], #16
fcvtzs v4.4s, v0.4s, #31
ld1 {v1.4s}, [x1], #16
fcvtzs v5.4s, v1.4s, #31
b.eq 3f
ands x12, x2, #~15
b.eq 2f
1: subs x12, x12, #16
sqrshrn v4.4h, v4.4s, #16
ld1 {v2.4s}, [x1], #16
fcvtzs v6.4s, v2.4s, #31
sqrshrn2 v4.8h, v5.4s, #16
ld1 {v3.4s}, [x1], #16
fcvtzs v7.4s, v3.4s, #31
sqrshrn v6.4h, v6.4s, #16
st1 {v4.8h}, [x0], #16
sqrshrn2 v6.8h, v7.4s, #16
ld1 {v0.4s}, [x1], #16
fcvtzs v4.4s, v0.4s, #31
ld1 {v1.4s}, [x1], #16
fcvtzs v5.4s, v1.4s, #31
st1 {v6.8h}, [x0], #16
b.ne 1b
ands x2, x2, #15
b.eq 3f
2: ld1 {v2.4s}, [x1], #16
sqrshrn v4.4h, v4.4s, #16
fcvtzs v6.4s, v2.4s, #31
ld1 {v3.4s}, [x1], #16
sqrshrn2 v4.8h, v5.4s, #16
fcvtzs v7.4s, v3.4s, #31
sqrshrn v6.4h, v6.4s, #16
st1 {v4.8h}, [x0], #16
sqrshrn2 v6.8h, v7.4s, #16
st1 {v6.8h}, [x0]
ret
3: sqrshrn v4.4h, v4.4s, #16
sqrshrn2 v4.8h, v5.4s, #16
st1 {v4.8h}, [x0]
ret
endfunc
function ff_conv_fltp_to_s16_2ch_neon, export=1
ldp x4, x5, [x1]
subs x2, x2, #8
ld1 {v0.4s}, [x4], #16
fcvtzs v4.4s, v0.4s, #31
ld1 {v1.4s}, [x4], #16
fcvtzs v5.4s, v1.4s, #31
ld1 {v2.4s}, [x5], #16
fcvtzs v6.4s, v2.4s, #31
ld1 {v3.4s}, [x5], #16
fcvtzs v7.4s, v3.4s, #31
b.eq 3f
ands x12, x2, #~15
b.eq 2f
1: subs x12, x12, #16
ld1 {v16.4s}, [x4], #16
fcvtzs v20.4s, v16.4s, #31
sri v6.4s, v4.4s, #16
ld1 {v17.4s}, [x4], #16
fcvtzs v21.4s, v17.4s, #31
ld1 {v18.4s}, [x5], #16
fcvtzs v22.4s, v18.4s, #31
ld1 {v19.4s}, [x5], #16
sri v7.4s, v5.4s, #16
st1 {v6.4s}, [x0], #16
fcvtzs v23.4s, v19.4s, #31
st1 {v7.4s}, [x0], #16
sri v22.4s, v20.4s, #16
ld1 {v0.4s}, [x4], #16
sri v23.4s, v21.4s, #16
st1 {v22.4s}, [x0], #16
fcvtzs v4.4s, v0.4s, #31
ld1 {v1.4s}, [x4], #16
fcvtzs v5.4s, v1.4s, #31
ld1 {v2.4s}, [x5], #16
fcvtzs v6.4s, v2.4s, #31
ld1 {v3.4s}, [x5], #16
fcvtzs v7.4s, v3.4s, #31
st1 {v23.4s}, [x0], #16
b.ne 1b
ands x2, x2, #15
b.eq 3f
2: sri v6.4s, v4.4s, #16
ld1 {v0.4s}, [x4], #16
fcvtzs v0.4s, v0.4s, #31
ld1 {v1.4s}, [x4], #16
fcvtzs v1.4s, v1.4s, #31
ld1 {v2.4s}, [x5], #16
fcvtzs v2.4s, v2.4s, #31
sri v7.4s, v5.4s, #16
ld1 {v3.4s}, [x5], #16
fcvtzs v3.4s, v3.4s, #31
sri v2.4s, v0.4s, #16
st1 {v6.4s,v7.4s}, [x0], #32
sri v3.4s, v1.4s, #16
st1 {v2.4s,v3.4s}, [x0], #32
ret
3: sri v6.4s, v4.4s, #16
sri v7.4s, v5.4s, #16
st1 {v6.4s,v7.4s}, [x0]
ret
endfunc
function ff_conv_fltp_to_s16_neon, export=1
cmp w3, #2
b.eq X(ff_conv_fltp_to_s16_2ch_neon)
b.gt 1f
ldr x1, [x1]
b X(ff_conv_flt_to_s16_neon)
1:
cmp w3, #4
lsl x12, x3, #1
b.lt 4f
5: // 4 channels
ldp x4, x5, [x1], #16
ldp x6, x7, [x1], #16
mov w9, w2
mov x8, x0
ld1 {v4.4s}, [x4], #16
fcvtzs v4.4s, v4.4s, #31
ld1 {v5.4s}, [x5], #16
fcvtzs v5.4s, v5.4s, #31
ld1 {v6.4s}, [x6], #16
fcvtzs v6.4s, v6.4s, #31
ld1 {v7.4s}, [x7], #16
fcvtzs v7.4s, v7.4s, #31
6:
subs w9, w9, #8
ld1 {v0.4s}, [x4], #16
fcvtzs v0.4s, v0.4s, #31
sri v5.4s, v4.4s, #16
ld1 {v1.4s}, [x5], #16
fcvtzs v1.4s, v1.4s, #31
sri v7.4s, v6.4s, #16
ld1 {v2.4s}, [x6], #16
fcvtzs v2.4s, v2.4s, #31
zip1 v16.4s, v5.4s, v7.4s
ld1 {v3.4s}, [x7], #16
fcvtzs v3.4s, v3.4s, #31
zip2 v17.4s, v5.4s, v7.4s
st1 {v16.d}[0], [x8], x12
sri v1.4s, v0.4s, #16
st1 {v16.d}[1], [x8], x12
sri v3.4s, v2.4s, #16
st1 {v17.d}[0], [x8], x12
zip1 v18.4s, v1.4s, v3.4s
st1 {v17.d}[1], [x8], x12
zip2 v19.4s, v1.4s, v3.4s
b.eq 7f
ld1 {v4.4s}, [x4], #16
fcvtzs v4.4s, v4.4s, #31
st1 {v18.d}[0], [x8], x12
ld1 {v5.4s}, [x5], #16
fcvtzs v5.4s, v5.4s, #31
st1 {v18.d}[1], [x8], x12
ld1 {v6.4s}, [x6], #16
fcvtzs v6.4s, v6.4s, #31
st1 {v19.d}[0], [x8], x12
ld1 {v7.4s}, [x7], #16
fcvtzs v7.4s, v7.4s, #31
st1 {v19.d}[1], [x8], x12
b 6b
7:
st1 {v18.d}[0], [x8], x12
st1 {v18.d}[1], [x8], x12
st1 {v19.d}[0], [x8], x12
st1 {v19.d}[1], [x8], x12
subs w3, w3, #4
b.eq end
cmp w3, #4
add x0, x0, #8
b.ge 5b
4: // 2 channels
cmp w3, #2
b.lt 4f
ldp x4, x5, [x1], #16
mov w9, w2
mov x8, x0
tst w9, #8
ld1 {v4.4s}, [x4], #16
fcvtzs v4.4s, v4.4s, #31
ld1 {v5.4s}, [x5], #16
fcvtzs v5.4s, v5.4s, #31
ld1 {v6.4s}, [x4], #16
fcvtzs v6.4s, v6.4s, #31
ld1 {v7.4s}, [x5], #16
fcvtzs v7.4s, v7.4s, #31
b.eq 6f
subs w9, w9, #8
b.eq 7f
sri v5.4s, v4.4s, #16
ld1 {v4.4s}, [x4], #16
fcvtzs v4.4s, v4.4s, #31
st1 {v5.s}[0], [x8], x12
sri v7.4s, v6.4s, #16
st1 {v5.s}[1], [x8], x12
ld1 {v6.4s}, [x4], #16
fcvtzs v6.4s, v6.4s, #31
st1 {v5.s}[2], [x8], x12
st1 {v5.s}[3], [x8], x12
st1 {v7.s}[0], [x8], x12
st1 {v7.s}[1], [x8], x12
ld1 {v5.4s}, [x5], #16
fcvtzs v5.4s, v5.4s, #31
st1 {v7.s}[2], [x8], x12
st1 {v7.s}[3], [x8], x12
ld1 {v7.4s}, [x5], #16
fcvtzs v7.4s, v7.4s, #31
6:
subs w9, w9, #16
ld1 {v0.4s}, [x4], #16
sri v5.4s, v4.4s, #16
fcvtzs v0.4s, v0.4s, #31
ld1 {v1.4s}, [x5], #16
sri v7.4s, v6.4s, #16
st1 {v5.s}[0], [x8], x12
st1 {v5.s}[1], [x8], x12
fcvtzs v1.4s, v1.4s, #31
st1 {v5.s}[2], [x8], x12
st1 {v5.s}[3], [x8], x12
ld1 {v2.4s}, [x4], #16
st1 {v7.s}[0], [x8], x12
fcvtzs v2.4s, v2.4s, #31
st1 {v7.s}[1], [x8], x12
ld1 {v3.4s}, [x5], #16
st1 {v7.s}[2], [x8], x12
fcvtzs v3.4s, v3.4s, #31
st1 {v7.s}[3], [x8], x12
sri v1.4s, v0.4s, #16
sri v3.4s, v2.4s, #16
b.eq 6f
ld1 {v4.4s}, [x4], #16
st1 {v1.s}[0], [x8], x12
fcvtzs v4.4s, v4.4s, #31
st1 {v1.s}[1], [x8], x12
ld1 {v5.4s}, [x5], #16
st1 {v1.s}[2], [x8], x12
fcvtzs v5.4s, v5.4s, #31
st1 {v1.s}[3], [x8], x12
ld1 {v6.4s}, [x4], #16
st1 {v3.s}[0], [x8], x12
fcvtzs v6.4s, v6.4s, #31
st1 {v3.s}[1], [x8], x12
ld1 {v7.4s}, [x5], #16
st1 {v3.s}[2], [x8], x12
fcvtzs v7.4s, v7.4s, #31
st1 {v3.s}[3], [x8], x12
b.gt 6b
6:
st1 {v1.s}[0], [x8], x12
st1 {v1.s}[1], [x8], x12
st1 {v1.s}[2], [x8], x12
st1 {v1.s}[3], [x8], x12
st1 {v3.s}[0], [x8], x12
st1 {v3.s}[1], [x8], x12
st1 {v3.s}[2], [x8], x12
st1 {v3.s}[3], [x8], x12
b 8f
7:
sri v5.4s, v4.4s, #16
sri v7.4s, v6.4s, #16
st1 {v5.s}[0], [x8], x12
st1 {v5.s}[1], [x8], x12
st1 {v5.s}[2], [x8], x12
st1 {v5.s}[3], [x8], x12
st1 {v7.s}[0], [x8], x12
st1 {v7.s}[1], [x8], x12
st1 {v7.s}[2], [x8], x12
st1 {v7.s}[3], [x8], x12
8:
subs w3, w3, #2
add x0, x0, #4
b.eq end
4: // 1 channel
ldr x4, [x1]
tst w2, #8
mov w9, w2
mov x5, x0
ld1 {v0.4s}, [x4], #16
fcvtzs v0.4s, v0.4s, #31
ld1 {v1.4s}, [x4], #16
fcvtzs v1.4s, v1.4s, #31
b.ne 8f
6:
subs w9, w9, #16
ld1 {v2.4s}, [x4], #16
fcvtzs v2.4s, v2.4s, #31
ld1 {v3.4s}, [x4], #16
fcvtzs v3.4s, v3.4s, #31
st1 {v0.h}[1], [x5], x12
st1 {v0.h}[3], [x5], x12
st1 {v0.h}[5], [x5], x12
st1 {v0.h}[7], [x5], x12
st1 {v1.h}[1], [x5], x12
st1 {v1.h}[3], [x5], x12
st1 {v1.h}[5], [x5], x12
st1 {v1.h}[7], [x5], x12
b.eq 7f
ld1 {v0.4s}, [x4], #16
fcvtzs v0.4s, v0.4s, #31
ld1 {v1.4s}, [x4], #16
fcvtzs v1.4s, v1.4s, #31
7:
st1 {v2.h}[1], [x5], x12
st1 {v2.h}[3], [x5], x12
st1 {v2.h}[5], [x5], x12
st1 {v2.h}[7], [x5], x12
st1 {v3.h}[1], [x5], x12
st1 {v3.h}[3], [x5], x12
st1 {v3.h}[5], [x5], x12
st1 {v3.h}[7], [x5], x12
b.gt 6b
ret
8:
subs w9, w9, #8
st1 {v0.h}[1], [x5], x12
st1 {v0.h}[3], [x5], x12
st1 {v0.h}[5], [x5], x12
st1 {v0.h}[7], [x5], x12
st1 {v1.h}[1], [x5], x12
st1 {v1.h}[3], [x5], x12
st1 {v1.h}[5], [x5], x12
st1 {v1.h}[7], [x5], x12
b.eq end
ld1 {v0.4s}, [x4], #16
fcvtzs v0.4s, v0.4s, #31
ld1 {v1.4s}, [x4], #16
fcvtzs v1.4s, v1.4s, #31
b 6b
end:
ret
endfunc

2
libavresample/audio_convert.c
View File

@@ -301,6 +301,8 @@ AudioConvert *ff_audio_convert_alloc(AVAudioResampleContext *avr,
set_generic_function(ac);
if (ARCH_AARCH64)
ff_audio_convert_init_aarch64(ac);
if (ARCH_ARM)
ff_audio_convert_init_arm(ac);
if (ARCH_X86)

1
libavresample/audio_convert.h
View File

@@ -96,6 +96,7 @@ int ff_audio_convert(AudioConvert *ac, AudioData *out, AudioData *in);
/* arch-specific initialization functions */
void ff_audio_convert_init_aarch64(AudioConvert *ac);
void ff_audio_convert_init_arm(AudioConvert *ac);
void ff_audio_convert_init_x86(AudioConvert *ac);