FFmpeg
fmtconvert_init.c
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1 /*
2  * Copyright © 2022 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 <stdint.h>
22 
23 #include "config.h"
24 #include "libavutil/attributes.h"
25 #include "libavutil/cpu.h"
26 #include "libavcodec/fmtconvert.h"
27 
29  float mul, int len);
31  const int32_t *src, const float *mul,
32  int len);
33 
35 {
36 #if HAVE_RVV
37  int flags = av_get_cpu_flags();
38 
40  c->int32_to_float_fmul_scalar = ff_int32_to_float_fmul_scalar_rvv;
41  c->int32_to_float_fmul_array8 = ff_int32_to_float_fmul_array8_rvv;
42  }
43 #endif
44 }
ff_int32_to_float_fmul_scalar_rvv
void ff_int32_to_float_fmul_scalar_rvv(float *dst, const int32_t *src, float mul, int len)
av_get_cpu_flags
int av_get_cpu_flags(void)
Return the flags which specify extensions supported by the CPU.
Definition: cpu.c:107
fmtconvert.h
AV_CPU_FLAG_RVB
#define AV_CPU_FLAG_RVB
B (bit manipulations)
Definition: cpu.h:102
ff_fmt_convert_init_riscv
av_cold void ff_fmt_convert_init_riscv(FmtConvertContext *c)
Definition: fmtconvert_init.c:34
AV_CPU_FLAG_RVV_F32
#define AV_CPU_FLAG_RVV_F32
Vectors of float's *‍/.
Definition: cpu.h:93
av_cold
#define av_cold
Definition: attributes.h:90
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
dst
uint8_t ptrdiff_t const uint8_t ptrdiff_t int intptr_t intptr_t int int16_t * dst
Definition: dsp.h:83
cpu.h
attributes.h
len
int len
Definition: vorbis_enc_data.h:426
FmtConvertContext
Definition: fmtconvert.h:28
int32_t
int32_t
Definition: audioconvert.c:56
flags
#define flags(name, subs,...)
Definition: cbs_av1.c:482
ff_int32_to_float_fmul_array8_rvv
void ff_int32_to_float_fmul_array8_rvv(FmtConvertContext *c, float *dst, const int32_t *src, const float *mul, int len)
src
#define src
Definition: vp8dsp.c:248