FFmpeg
huffyuvdsp.c
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1 /*
2  * Copyright (c) 2016 Alexandra Hájková
3  *
4  * This file is part of FFmpeg.
5  *
6  * FFmpeg is free software; you can redistribute it and/or modify
7  * it under the terms of the GNU General Public License as published by
8  * the Free Software Foundation; either version 2 of the License, or
9  * (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
14  * GNU General Public License for more details.
15  *
16  * You should have received a copy of the GNU General Public License along
17  * with FFmpeg; if not, write to the Free Software Foundation, Inc.,
18  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
19  */
20 
21 #include <string.h>
22 
23 #include "libavutil/common.h"
24 #include "libavutil/intreadwrite.h"
25 #include "libavutil/mem.h"
26 
27 #include "libavcodec/huffyuvdsp.h"
28 
29 #include "checkasm.h"
30 
31 #define randomize_buffers(buf, size) \
32  do { \
33  int j; \
34  for (j = 0; j < size; j++) \
35  buf[j] = rnd() & 0xFFFF; \
36  } while (0)
37 
38 static void check_add_int16(HuffYUVDSPContext c, unsigned mask, int width, const char * name)
39 {
40  uint16_t *src0 = av_mallocz(width * sizeof(uint16_t));
41  uint16_t *src1 = av_mallocz(width * sizeof(uint16_t));
42  uint16_t *dst0 = av_mallocz(width * sizeof(uint16_t));
43  uint16_t *dst1 = av_mallocz(width * sizeof(uint16_t));
44 
45  declare_func_emms(AV_CPU_FLAG_MMX, void, uint16_t *dst, uint16_t *src, unsigned mask, int w);
46 
47  if (!src0 || !src1 || !dst0 || !dst1)
48  fail();
49 
51  memcpy(src1, src0, width * sizeof(uint16_t));
52 
53  if (check_func(c.add_int16, "%s", name)) {
54  call_ref(dst0, src0, mask, width);
55  call_new(dst1, src1, mask, width);
56  if (memcmp(dst0, dst1, width * sizeof(uint16_t)))
57  fail();
58  bench_new(dst1, src1, mask, width);
59  }
60 
61  av_free(src0);
62  av_free(src1);
63  av_free(dst0);
64  av_free(dst1);
65 }
66 
68 {
70  int width = 16 * av_clip(rnd(), 16, 128);
71 
73 
74  /*! test width not multiple of mmsize */
75  check_add_int16(c, 65535, width, "add_int16_rnd_width");
76  report("add_int16_rnd_width");
77 
78  /*! test always with the same size (for perf test) */
79  check_add_int16(c, 65535, 16*128, "add_int16_128");
80  report("add_int16_128");
81 }
HuffYUVDSPContext
Definition: huffyuvdsp.h:38
declare_func_emms
#define declare_func_emms(cpu_flags, ret,...)
Definition: checkasm.h:131
name
it s the only field you need to keep assuming you have a context There is some magic you don t need to care about around this just let it vf default minimum maximum flags name is the option name
Definition: writing_filters.txt:88
av_clip
#define av_clip
Definition: common.h:122
w
uint8_t w
Definition: llviddspenc.c:39
huffyuvdsp.h
check_func
#define check_func(func,...)
Definition: checkasm.h:125
call_ref
#define call_ref(...)
Definition: checkasm.h:140
fail
#define fail()
Definition: checkasm.h:134
checkasm.h
checkasm_check_huffyuvdsp
void checkasm_check_huffyuvdsp(void)
Definition: huffyuvdsp.c:67
rnd
#define rnd()
Definition: checkasm.h:118
mask
static const uint16_t mask[17]
Definition: lzw.c:38
width
#define width
intreadwrite.h
call_new
#define call_new(...)
Definition: checkasm.h:212
check_add_int16
static void check_add_int16(HuffYUVDSPContext c, unsigned mask, int width, const char *name)
Definition: huffyuvdsp.c:38
src
#define src
Definition: vp8dsp.c:255
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
ff_huffyuvdsp_init
av_cold void ff_huffyuvdsp_init(HuffYUVDSPContext *c, enum AVPixelFormat pix_fmt)
Definition: huffyuvdsp.c:83
randomize_buffers
#define randomize_buffers(buf, size)
Definition: huffyuvdsp.c:31
src0
#define src0
Definition: h264pred.c:139
src1
#define src1
Definition: h264pred.c:140
report
#define report
Definition: checkasm.h:137
bench_new
#define bench_new(...)
Definition: checkasm.h:272
common.h
av_mallocz
void * av_mallocz(size_t size)
Allocate a memory block with alignment suitable for all memory accesses (including vectors if availab...
Definition: mem.c:243
AV_CPU_FLAG_MMX
#define AV_CPU_FLAG_MMX
standard MMX
Definition: cpu.h:29
AV_PIX_FMT_YUV422P
@ AV_PIX_FMT_YUV422P
planar YUV 4:2:2, 16bpp, (1 Cr & Cb sample per 2x1 Y samples)
Definition: pixfmt.h:70
mem.h
av_free
#define av_free(p)
Definition: tableprint_vlc.h:34