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lavc/lpc: R-V V apply_welch_window

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apply_welch_window_even_c:       617.5
apply_welch_window_even_rvv_f64: 235.0
apply_welch_window_odd_c:        709.0
apply_welch_window_odd_rvv_f64:  256.5
This commit is contained in:
Rémi Denis-Courmont 2023-12-08 17:42:22 +02:00
parent 341a483b08
commit 272d0c164d
5 changed files with 131 additions and 1 deletions
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4
libavcodec/lpc.c
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@ -320,7 +320,9 @@ av_cold int ff_lpc_init(LPCContext *s, int blocksize, int max_order,
s->lpc_apply_welch_window = lpc_apply_welch_window_c;
s->lpc_compute_autocorr = lpc_compute_autocorr_c;
#if ARCH_X86
#if ARCH_RISCV
ff_lpc_init_riscv(s);
#elif ARCH_X86
ff_lpc_init_x86(s);
#endif

1
libavcodec/lpc.h
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@ -109,6 +109,7 @@ double ff_lpc_calc_ref_coefs_f(LPCContext *s, const float *samples, int len,
*/
int ff_lpc_init(LPCContext *s, int blocksize, int max_order,
enum FFLPCType lpc_type);
void ff_lpc_init_riscv(LPCContext *s);
void ff_lpc_init_x86(LPCContext *s);
/**

2
libavcodec/riscv/Makefile
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@ -33,6 +33,8 @@ OBJS-$(CONFIG_LLVIDDSP) += riscv/llviddsp_init.o
RVV-OBJS-$(CONFIG_LLVIDDSP) += riscv/llviddsp_rvv.o
OBJS-$(CONFIG_LLVIDENCDSP) += riscv/llvidencdsp_init.o
RVV-OBJS-$(CONFIG_LLVIDENCDSP) += riscv/llvidencdsp_rvv.o
OBJS-$(CONFIG_LPC) += riscv/lpc_init.o
RVV-OBJS-$(CONFIG_LPC) += riscv/lpc_rvv.o
OBJS-$(CONFIG_OPUS_DECODER) += riscv/opusdsp_init.o
RVV-OBJS-$(CONFIG_OPUS_DECODER) += riscv/opusdsp_rvv.o
OBJS-$(CONFIG_PIXBLOCKDSP) += riscv/pixblockdsp_init.o

37
libavcodec/riscv/lpc_init.c Normal file
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@ -0,0 +1,37 @@
/*
* Copyright © 2022 Rémi Denis-Courmont.
*
* This file is part of FFmpeg.
*
* FFmpeg 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.
*
* FFmpeg 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 FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "config.h"
#include "libavutil/attributes.h"
#include "libavutil/cpu.h"
#include "libavcodec/lpc.h"
void ff_lpc_apply_welch_window_rvv(const int32_t *, ptrdiff_t, double *);
av_cold void ff_lpc_init_riscv(LPCContext *c)
{
#if HAVE_RVV && (__riscv_xlen >= 64)
int flags = av_get_cpu_flags();
if ((flags & AV_CPU_FLAG_RVV_F64) && (flags & AV_CPU_FLAG_RVB_ADDR))
c->lpc_apply_welch_window = ff_lpc_apply_welch_window_rvv;
#endif
}

88
libavcodec/riscv/lpc_rvv.S Normal file
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@ -0,0 +1,88 @@
/*
* Copyright © 2023 Rémi Denis-Courmont.
*
* This file is part of FFmpeg.
*
* FFmpeg 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.
*
* FFmpeg 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 FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "libavutil/riscv/asm.S"
#if __riscv_xlen >= 64
func ff_lpc_apply_welch_window_rvv, zve64d
vsetvli t0, zero, e64, m8, ta, ma
vid.v v0
addi t2, a1, -1
vfcvt.f.xu.v v0, v0
li t3, 2
fcvt.d.l ft2, t2
srai t1, a1, 1
fcvt.d.l ft3, t3
li t4, 1
fdiv.d ft0, ft3, ft2 # ft0 = c = 2. / (len - 1)
fcvt.d.l fa1, t4 # fa1 = 1.
fsub.d ft1, ft0, fa1
vfrsub.vf v0, v0, ft1 # v0[i] = c - i - 1.
1:
vsetvli t0, t1, e64, m8, ta, ma
vfmul.vv v16, v0, v0 # no fused multipy-add as v0 is reused
sub t1, t1, t0
vle32.v v8, (a0)
fcvt.d.l ft2, t0
vfrsub.vf v16, v16, fa1 # v16 = 1. - w * w
sh2add a0, t0, a0
vsetvli zero, zero, e32, m4, ta, ma
vfwcvt.f.x.v v24, v8
vsetvli zero, zero, e64, m8, ta, ma
vfsub.vf v0, v0, ft2 # v0 -= vl
vfmul.vv v8, v24, v16
vse64.v v8, (a2)
sh3add a2, t0, a2
bnez t1, 1b
andi t1, a1, 1
beqz t1, 2f
sd zero, (a2)
addi a0, a0, 4
addi a2, a2, 8
2:
vsetvli t0, zero, e64, m8, ta, ma
vid.v v0
srai t1, a1, 1
vfcvt.f.xu.v v0, v0
fcvt.d.l ft1, t1
fsub.d ft1, ft0, ft1 # ft1 = c - (len / 2)
vfadd.vf v0, v0, ft1 # v0[i] = c - (len / 2) + i
3:
vsetvli t0, t1, e64, m8, ta, ma
vfmul.vv v16, v0, v0
sub t1, t1, t0
vle32.v v8, (a0)
fcvt.d.l ft2, t0
vfrsub.vf v16, v16, fa1 # v16 = 1. - w * w
sh2add a0, t0, a0
vsetvli zero, zero, e32, m4, ta, ma
vfwcvt.f.x.v v24, v8
vsetvli zero, zero, e64, m8, ta, ma
vfadd.vf v0, v0, ft2 # v0 += vl
vfmul.vv v8, v24, v16
vse64.v v8, (a2)
sh3add a2, t0, a2
bnez t1, 3b
ret
endfunc
#endif