FFmpeg
ac3dsp_init.c
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1 /*
2  * Copyright © 2023 Rémi Denis-Courmont.
3  *
4  * This file is part of FFmpeg.
5  *
6  * FFmpeg is free software; you can redistribute it and/or
7  * modify it under the terms of the GNU Lesser General Public
8  * License as published by the Free Software Foundation; either
9  * version 2.1 of the License, or (at your option) any later version.
10  *
11  * FFmpeg is distributed in the hope that it will be useful,
12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14  * Lesser General Public License for more details.
15  *
16  * You should have received a copy of the GNU Lesser General Public
17  * License along with FFmpeg; if not, write to the Free Software
18  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19  */
20 
21 #include <stddef.h>
22 #include <stdint.h>
23 
24 #include "config.h"
25 #include "libavutil/attributes.h"
26 #include "libavutil/cpu.h"
27 #include "libavcodec/ac3dsp.h"
28 
29 void ff_ac3_exponent_min_rvb(uint8_t *exp, int, int);
30 void ff_ac3_exponent_min_rvv(uint8_t *exp, int, int);
31 void ff_extract_exponents_rvb(uint8_t *exp, int32_t *coef, int nb_coefs);
32 void ff_extract_exponents_rvvb(uint8_t *exp, int32_t *coef, int nb_coefs);
33 void ff_float_to_fixed24_rvv(int32_t *dst, const float *src, size_t len);
35  const int32_t *, int);
36 void ff_sum_square_butterfly_float_rvv(float *, const float *,
37  const float *, int);
38 
40 {
41 #if HAVE_RV
42  int flags = av_get_cpu_flags();
43 
45  c->ac3_exponent_min = ff_ac3_exponent_min_rvb;
47  c->ac3_exponent_min = ff_ac3_exponent_min_rvv;
48 
51  c->extract_exponents = ff_extract_exponents_rvb;
52 # if HAVE_RV_ZVBB
54  c->extract_exponents = ff_extract_exponents_rvvb;
55 # endif
56  if (flags & AV_CPU_FLAG_RVV_F32) {
57  c->float_to_fixed24 = ff_float_to_fixed24_rvv;
58  c->sum_square_butterfly_float = ff_sum_square_butterfly_float_rvv;
59  }
60 # if __riscv_xlen >= 64
62  c->sum_square_butterfly_int32 = ff_sum_square_butterfly_int32_rvv;
63 # endif
64  }
65 #endif
66 }
ff_sum_square_butterfly_float_rvv
void ff_sum_square_butterfly_float_rvv(float *, const float *, const float *, int)
nb_coefs
static int nb_coefs(int length, int level, uint64_t sn)
Definition: af_afwtdn.c:515
AV_CPU_FLAG_RVB_BASIC
#define AV_CPU_FLAG_RVB_BASIC
Basic bit-manipulations.
Definition: cpu.h:91
AV_CPU_FLAG_RV_ZVBB
#define AV_CPU_FLAG_RV_ZVBB
Vector basic bit-manipulations.
Definition: cpu.h:93
int64_t
long long int64_t
Definition: coverity.c:34
AC3DSPContext
Definition: ac3dsp.h:34
av_get_cpu_flags
int av_get_cpu_flags(void)
Return the flags which specify extensions supported by the CPU.
Definition: cpu.c:103
ff_float_to_fixed24_rvv
void ff_float_to_fixed24_rvv(int32_t *dst, const float *src, size_t len)
AV_CPU_FLAG_RVV_F32
#define AV_CPU_FLAG_RVV_F32
Vectors of float's *‍/.
Definition: cpu.h:88
av_cold
#define av_cold
Definition: attributes.h:90
ff_extract_exponents_rvb
void ff_extract_exponents_rvb(uint8_t *exp, int32_t *coef, int nb_coefs)
AV_CPU_FLAG_RVB_ADDR
#define AV_CPU_FLAG_RVB_ADDR
Address bit-manipulations.
Definition: cpu.h:92
ac3dsp.h
ff_ac3_exponent_min_rvb
void ff_ac3_exponent_min_rvb(uint8_t *exp, int, int)
exp
int8_t exp
Definition: eval.c:73
c
Undefined Behavior In the C some operations are like signed integer dereferencing freed accessing outside allocated Undefined Behavior must not occur in a C it is not safe even if the output of undefined operations is unused The unsafety may seem nit picking but Optimizing compilers have in fact optimized code on the assumption that no undefined Behavior occurs Optimizing code based on wrong assumptions can and has in some cases lead to effects beyond the output of computations The signed integer overflow problem in speed critical code Code which is highly optimized and works with signed integers sometimes has the problem that often the output of the computation does not c
Definition: undefined.txt:32
cpu.h
attributes.h
ff_sum_square_butterfly_int32_rvv
void ff_sum_square_butterfly_int32_rvv(int64_t *, const int32_t *, const int32_t *, int)
ff_ac3dsp_init_riscv
av_cold void ff_ac3dsp_init_riscv(AC3DSPContext *c)
Definition: ac3dsp_init.c:39
AV_CPU_FLAG_RVV_I32
#define AV_CPU_FLAG_RVV_I32
Vectors of 8/16/32-bit int's *‍/.
Definition: cpu.h:87
ff_ac3_exponent_min_rvv
void ff_ac3_exponent_min_rvv(uint8_t *exp, int, int)
len
int len
Definition: vorbis_enc_data.h:426
ff_extract_exponents_rvvb
void ff_extract_exponents_rvvb(uint8_t *exp, int32_t *coef, int nb_coefs)
src
INIT_CLIP pixel * src
Definition: h264pred_template.c:418
int32_t
int32_t
Definition: audioconvert.c:56
flags
#define flags(name, subs,...)
Definition: cbs_av1.c:474
AV_CPU_FLAG_RVV_I64
#define AV_CPU_FLAG_RVV_I64
Vectors of 64-bit int's *‍/.
Definition: cpu.h:89