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lavc/ac3dsp: add R-V Zvbb extract_exponents

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Rémi Denis-Courmont 2024-05-07 22:10:59 +03:00
parent 5d8f62feb5
commit 0d9591841b
3 changed files with 49 additions and 0 deletions
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1
libavcodec/riscv/Makefile
View File

@ -5,6 +5,7 @@ RVV-OBJS-$(CONFIG_AAC_ENCODER) += riscv/aacencdsp_rvv.o
OBJS-$(CONFIG_AC3DSP) += riscv/ac3dsp_init.o
RV-OBJS-$(CONFIG_AC3DSP) += riscv/ac3dsp_rvb.o
RVV-OBJS-$(CONFIG_AC3DSP) += riscv/ac3dsp_rvv.o
RVVB-OBJS-$(CONFIG_AC3DSP) += riscv/ac3dsp_rvvb.o
OBJS-$(CONFIG_ALAC_DECODER) += riscv/alacdsp_init.o
RVV-OBJS-$(CONFIG_ALAC_DECODER) += riscv/alacdsp_rvv.o
OBJS-$(CONFIG_AUDIODSP) += riscv/audiodsp_init.o

5
libavcodec/riscv/ac3dsp_init.c
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@ -29,6 +29,7 @@
void ff_ac3_exponent_min_rvb(uint8_t *exp, int, int);
void ff_ac3_exponent_min_rvv(uint8_t *exp, int, int);
void ff_extract_exponents_rvb(uint8_t *exp, int32_t *coef, int nb_coefs);
void ff_extract_exponents_rvvb(uint8_t *exp, int32_t *coef, int nb_coefs);
void ff_float_to_fixed24_rvv(int32_t *dst, const float *src, size_t len);
void ff_sum_square_butterfly_int32_rvv(int64_t *, const int32_t *,
const int32_t *, int);
@ -48,6 +49,10 @@ av_cold void ff_ac3dsp_init_riscv(AC3DSPContext *c)
if (flags & AV_CPU_FLAG_RVB_ADDR) {
if (flags & AV_CPU_FLAG_RVB_BASIC)
c->extract_exponents = ff_extract_exponents_rvb;
# if HAVE_RV_ZVBB
if (flags & AV_CPU_FLAG_RV_ZVBB)
c->extract_exponents = ff_extract_exponents_rvvb;
# endif
if (flags & AV_CPU_FLAG_RVV_F32) {
c->float_to_fixed24 = ff_float_to_fixed24_rvv;
c->sum_square_butterfly_float = ff_sum_square_butterfly_float_rvv;

43
libavcodec/riscv/ac3dsp_rvvb.S Normal file
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@ -0,0 +1,43 @@
/*
* 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 "config.h"
#include "libavutil/riscv/asm.S"
func ff_extract_exponents_rvvb, zve32x, zvbb
1:
vsetvli t0, a2, e32, m8, ta, ma
vle32.v v8, (a1)
sub a2, a2, t0
vneg.v v16, v8
sh2add a1, t0, a1
vmax.vv v8, v8, v16
vclz.v v8, v8
vsetvli zero, zero, e16, m4, ta, ma
vncvt.x.x.w v4, v8
vsetvli zero, zero, e8, m2, ta, ma
vncvt.x.x.w v2, v4
vadd.vi v2, v2, 24 - 32
vse8.v v2, (a0)
add a0, a0, t0
bnez a2, 1b
ret
endfunc