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 
50  randomize_buffers(src0, width);
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 }
Memory handling functions.
void * av_mallocz(size_t size)
Allocate a memory block with alignment suitable for all memory accesses (including vectors if availab...
Definition: mem.c:236
#define src
Definition: vp8dsp.c:254
#define report
Definition: checkasm.h:125
void(* add_int16)(uint16_t *dst, const uint16_t *src, unsigned mask, int w)
Definition: huffyuvdsp.h:39
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
static const uint16_t mask[17]
Definition: lzw.c:38
#define fail()
Definition: checkasm.h:122
planar YUV 4:2:2, 16bpp, (1 Cr & Cb sample per 2x1 Y samples)
Definition: pixfmt.h:70
#define width
uint8_t w
Definition: llviddspenc.c:38
void checkasm_check_huffyuvdsp(void)
Definition: huffyuvdsp.c:67
#define declare_func_emms(cpu_flags, ret,...)
Definition: checkasm.h:119
static void check_add_int16(HuffYUVDSPContext c, unsigned mask, int width, const char *name)
Definition: huffyuvdsp.c:38
#define randomize_buffers(buf, size)
Definition: huffyuvdsp.c:31
#define call_ref(...)
Definition: checkasm.h:128
#define src1
Definition: h264pred.c:139
#define AV_CPU_FLAG_MMX
standard MMX
Definition: cpu.h:31
#define check_func(func,...)
Definition: checkasm.h:113
av_cold void ff_huffyuvdsp_init(HuffYUVDSPContext *c, enum AVPixelFormat pix_fmt)
Definition: huffyuvdsp.c:83
#define src0
Definition: h264pred.c:138
common internal and external API header
#define rnd()
Definition: checkasm.h:106
#define av_free(p)
#define bench_new(...)
Definition: checkasm.h:255
#define call_new(...)
Definition: checkasm.h:195
const char * name
Definition: opengl_enc.c:102