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lavc/ac3: add R-V Zbb extract_exponents

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This commit is contained in:
Rémi Denis-Courmont 2023-10-02 19:38:03 +03:00
parent 9078dc0c52
commit 89c10d8d20
5 changed files with 81 additions and 0 deletions
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2
libavcodec/ac3dsp.c
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@ -395,5 +395,7 @@ av_cold void ff_ac3dsp_init(AC3DSPContext *c)
ff_ac3dsp_init_x86(c);
#elif ARCH_MIPS
ff_ac3dsp_init_mips(c);
#elif ARCH_RISCV
ff_ac3dsp_init_riscv(c);
#endif
}

1
libavcodec/ac3dsp.h
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@ -109,6 +109,7 @@ void ff_ac3dsp_init (AC3DSPContext *c);
void ff_ac3dsp_init_arm(AC3DSPContext *c);
void ff_ac3dsp_init_x86(AC3DSPContext *c);
void ff_ac3dsp_init_mips(AC3DSPContext *c);
void ff_ac3dsp_init_riscv(AC3DSPContext *c);
void ff_ac3dsp_downmix(AC3DSPContext *c, float **samples, float **matrix,
int out_ch, int in_ch, int len);

2
libavcodec/riscv/Makefile
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@ -1,5 +1,7 @@
OBJS-$(CONFIG_AAC_DECODER) += riscv/aacpsdsp_init.o
RVV-OBJS-$(CONFIG_AAC_DECODER) += riscv/aacpsdsp_rvv.o
OBJS-$(CONFIG_AC3DSP) += riscv/ac3dsp_init.o \
riscv/ac3dsp_rvb.o
OBJS-$(CONFIG_ALAC_DECODER) += riscv/alacdsp_init.o
RVV-OBJS-$(CONFIG_ALAC_DECODER) += riscv/alacdsp_rvv.o
OBJS-$(CONFIG_AUDIODSP) += riscv/audiodsp_init.o \

38
libavcodec/riscv/ac3dsp_init.c Normal file
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@ -0,0 +1,38 @@
/*
* 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 <stdint.h>
#include "config.h"
#include "libavutil/attributes.h"
#include "libavutil/cpu.h"
#include "libavcodec/ac3dsp.h"
void ff_extract_exponents_rvb(uint8_t *exp, int32_t *coef, int nb_coefs);
av_cold void ff_ac3dsp_init_riscv(AC3DSPContext *c)
{
int flags = av_get_cpu_flags();
if (flags & AV_CPU_FLAG_RVB_ADDR) {
if (flags & AV_CPU_FLAG_RVB_BASIC)
c->extract_exponents = ff_extract_exponents_rvb;
}
}

38
libavcodec/riscv/ac3dsp_rvb.S Normal file
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@ -0,0 +1,38 @@
/*
* 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_rvb, zbb
1:
lw t0, (a1)
addi a0, a0, 1
neg t1, t0
addi a1, a1, 4
max t0, t0, t1
addi a2, a2, -1
clz t0, t0
addi t0, t0, 24 - __riscv_xlen
sb t0, -1(a0)
bgtz a2, 1b
ret
endfunc