FFmpeg
jpeg2000dsp_init.c
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1 /*
2  * SIMD optimized JPEG 2000 DSP functions
3  * Copyright (c) 2015 James Almer
4  *
5  * This file is part of FFmpeg.
6  *
7  * FFmpeg is free software; you can redistribute it and/or
8  * modify it under the terms of the GNU Lesser General Public
9  * License as published by the Free Software Foundation; either
10  * version 2.1 of the License, or (at your option) any later version.
11  *
12  * FFmpeg is distributed in the hope that it will be useful,
13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15  * Lesser General Public License for more details.
16  *
17  * You should have received a copy of the GNU Lesser General Public
18  * License along with FFmpeg; if not, write to the Free Software
19  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20  */
21 
22 #include "libavutil/attributes.h"
23 #include "libavutil/cpu.h"
24 #include "libavutil/x86/cpu.h"
25 #include "libavcodec/jpeg2000dsp.h"
26 
27 void ff_ict_float_sse(void *src0, void *src1, void *src2, int csize);
28 void ff_ict_float_avx(void *src0, void *src1, void *src2, int csize);
29 void ff_ict_float_fma3(void *src0, void *src1, void *src2, int csize);
30 void ff_ict_float_fma4(void *src0, void *src1, void *src2, int csize);
31 void ff_rct_int_sse2 (void *src0, void *src1, void *src2, int csize);
32 void ff_rct_int_avx2 (void *src0, void *src1, void *src2, int csize);
33 
35 {
37  if (EXTERNAL_SSE(cpu_flags)) {
38  c->mct_decode[FF_DWT97] = ff_ict_float_sse;
39  }
40 
41  if (EXTERNAL_SSE2(cpu_flags)) {
42  c->mct_decode[FF_DWT53] = ff_rct_int_sse2;
43  }
44 
46  c->mct_decode[FF_DWT97] = ff_ict_float_avx;
47  }
48 
49  if (EXTERNAL_FMA4(cpu_flags)) {
50  c->mct_decode[FF_DWT97] = ff_ict_float_fma4;
51  }
52 
54  c->mct_decode[FF_DWT97] = ff_ict_float_fma3;
55  }
56 
58  c->mct_decode[FF_DWT53] = ff_rct_int_avx2;
59  }
60 }
cpu.h
EXTERNAL_AVX2_FAST
#define EXTERNAL_AVX2_FAST(flags)
Definition: cpu.h:79
FF_DWT97
@ FF_DWT97
Definition: jpeg2000dwt.h:37
av_get_cpu_flags
int av_get_cpu_flags(void)
Return the flags which specify extensions supported by the CPU.
Definition: cpu.c:96
cpu_flags
static atomic_int cpu_flags
Definition: cpu.c:50
av_cold
#define av_cold
Definition: attributes.h:90
EXTERNAL_SSE
#define EXTERNAL_SSE(flags)
Definition: cpu.h:58
ff_ict_float_avx
void ff_ict_float_avx(void *src0, void *src1, void *src2, int csize)
Jpeg2000DSPContext
Definition: jpeg2000dsp.h:29
EXTERNAL_AVX_FAST
#define EXTERNAL_AVX_FAST(flags)
Definition: cpu.h:71
EXTERNAL_FMA4
#define EXTERNAL_FMA4(flags)
Definition: cpu.h:77
ff_rct_int_avx2
void ff_rct_int_avx2(void *src0, void *src1, void *src2, int csize)
ff_ict_float_fma3
void ff_ict_float_fma3(void *src0, void *src1, void *src2, int csize)
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
ff_ict_float_sse
void ff_ict_float_sse(void *src0, void *src1, void *src2, int csize)
attributes.h
EXTERNAL_SSE2
#define EXTERNAL_SSE2(flags)
Definition: cpu.h:59
src0
#define src0
Definition: h264pred.c:139
src1
#define src1
Definition: h264pred.c:140
EXTERNAL_FMA3_FAST
#define EXTERNAL_FMA3_FAST(flags)
Definition: cpu.h:75
ff_ict_float_fma4
void ff_ict_float_fma4(void *src0, void *src1, void *src2, int csize)
FF_DWT53
@ FF_DWT53
Definition: jpeg2000dwt.h:38
ff_rct_int_sse2
void ff_rct_int_sse2(void *src0, void *src1, void *src2, int csize)
jpeg2000dsp.h
ff_jpeg2000dsp_init_x86
av_cold void ff_jpeg2000dsp_init_x86(Jpeg2000DSPContext *c)
Definition: jpeg2000dsp_init.c:34