FFmpeg
h264_chroma_init_riscv.c
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1 /*
2  * Copyright (c) 2023 SiFive, Inc. All rights reserved.
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  *
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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 "libavutil/attributes.h"
24 #include "libavutil/riscv/cpu.h"
25 #include "libavcodec/h264chroma.h"
26 #include "config.h"
27 
28 void h264_put_chroma_mc8_rvv(uint8_t *p_dst, const uint8_t *p_src, ptrdiff_t stride, int h, int x, int y);
29 void h264_avg_chroma_mc8_rvv(uint8_t *p_dst, const uint8_t *p_src, ptrdiff_t stride, int h, int x, int y);
30 void h264_put_chroma_mc4_rvv(uint8_t *p_dst, const uint8_t *p_src, ptrdiff_t stride, int h, int x, int y);
31 void h264_avg_chroma_mc4_rvv(uint8_t *p_dst, const uint8_t *p_src, ptrdiff_t stride, int h, int x, int y);
32 void h264_put_chroma_mc2_rvv(uint8_t *p_dst, const uint8_t *p_src, ptrdiff_t stride, int h, int x, int y);
33 void h264_avg_chroma_mc2_rvv(uint8_t *p_dst, const uint8_t *p_src, ptrdiff_t stride, int h, int x, int y);
34 
36 {
37 #if HAVE_RVV
38  int flags = av_get_cpu_flags();
39 
40  if (bit_depth == 8 && (flags & AV_CPU_FLAG_RVV_I32) &&
42  c->put_h264_chroma_pixels_tab[0] = h264_put_chroma_mc8_rvv;
43  c->avg_h264_chroma_pixels_tab[0] = h264_avg_chroma_mc8_rvv;
44  c->put_h264_chroma_pixels_tab[1] = h264_put_chroma_mc4_rvv;
45  c->avg_h264_chroma_pixels_tab[1] = h264_avg_chroma_mc4_rvv;
46  c->put_h264_chroma_pixels_tab[2] = h264_put_chroma_mc2_rvv;
47  c->avg_h264_chroma_pixels_tab[2] = h264_avg_chroma_mc2_rvv;
48  }
49 #endif
50 }
h264_put_chroma_mc4_rvv
void h264_put_chroma_mc4_rvv(uint8_t *p_dst, const uint8_t *p_src, ptrdiff_t stride, int h, int x, int y)
av_get_cpu_flags
int av_get_cpu_flags(void)
Return the flags which specify extensions supported by the CPU.
Definition: cpu.c:103
bit_depth
static void bit_depth(AudioStatsContext *s, const uint64_t *const mask, uint8_t *depth)
Definition: af_astats.c:246
h264_avg_chroma_mc4_rvv
void h264_avg_chroma_mc4_rvv(uint8_t *p_dst, const uint8_t *p_src, ptrdiff_t stride, int h, int x, int y)
h264_avg_chroma_mc8_rvv
void h264_avg_chroma_mc8_rvv(uint8_t *p_dst, const uint8_t *p_src, ptrdiff_t stride, int h, int x, int y)
av_cold
#define av_cold
Definition: attributes.h:90
ff_rv_vlen_least
static bool ff_rv_vlen_least(unsigned int bits)
Checks that the vector bit-size is at least the given value.
Definition: cpu.h:65
cpu.h
AV_CPU_FLAG_RVB_ADDR
#define AV_CPU_FLAG_RVB_ADDR
Address bit-manipulations.
Definition: cpu.h:92
ff_h264chroma_init_riscv
av_cold void ff_h264chroma_init_riscv(H264ChromaContext *c, int bit_depth)
Definition: h264_chroma_init_riscv.c:35
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
h264_put_chroma_mc2_rvv
void h264_put_chroma_mc2_rvv(uint8_t *p_dst, const uint8_t *p_src, ptrdiff_t stride, int h, int x, int y)
h264chroma.h
attributes.h
AV_CPU_FLAG_RVV_I32
#define AV_CPU_FLAG_RVV_I32
Vectors of 8/16/32-bit int's *‍/.
Definition: cpu.h:87
stride
#define stride
Definition: h264pred_template.c:537
H264ChromaContext
Definition: h264chroma.h:27
flags
#define flags(name, subs,...)
Definition: cbs_av1.c:474
h
h
Definition: vp9dsp_template.c:2038
h264_avg_chroma_mc2_rvv
void h264_avg_chroma_mc2_rvv(uint8_t *p_dst, const uint8_t *p_src, ptrdiff_t stride, int h, int x, int y)
h264_put_chroma_mc8_rvv
void h264_put_chroma_mc8_rvv(uint8_t *p_dst, const uint8_t *p_src, ptrdiff_t stride, int h, int x, int y)