FFmpeg  4.3
motion.c
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1 /*
2  * (c) 2001 Fabrice Bellard
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 /**
22  * @file
23  * motion test.
24  */
25 
26 #include <stdlib.h>
27 #include <stdio.h>
28 #include <string.h>
29 
30 #include "config.h"
31 #include "libavcodec/me_cmp.h"
32 #include "libavutil/internal.h"
33 #include "libavutil/lfg.h"
34 #include "libavutil/mem.h"
35 #include "libavutil/time.h"
36 
37 #undef printf
38 
39 #define WIDTH 64
40 #define HEIGHT 64
41 
44 
45 static void fill_random(uint8_t *tab, int size)
46 {
47  int i;
48  AVLFG prng;
49 
50  av_lfg_init(&prng, 1);
51  for(i=0;i<size;i++) {
52  tab[i] = av_lfg_get(&prng) % 256;
53  }
54 }
55 
56 static void help(void)
57 {
58  printf("motion-test [-h]\n"
59  "test motion implementations\n");
60 }
61 
62 #define NB_ITS 500
63 
64 int dummy;
65 
66 static void test_motion(const char *name,
67  me_cmp_func test_func, me_cmp_func ref_func)
68 {
69  int x, y, d1, d2, it;
70  uint8_t *ptr;
71  int64_t ti;
72  printf("testing '%s'\n", name);
73 
74  /* test correctness */
75  for(it=0;it<20;it++) {
76 
79 
80  for(y=0;y<HEIGHT-17;y++) {
81  for(x=0;x<WIDTH-17;x++) {
82  ptr = img2 + y * WIDTH + x;
83  d1 = test_func(NULL, img1, ptr, WIDTH, 8);
84  d2 = ref_func(NULL, img1, ptr, WIDTH, 8);
85  if (d1 != d2) {
86  printf("error: mmx=%d c=%d\n", d1, d2);
87  }
88  }
89  }
90  }
91  emms_c();
92 
93  /* speed test */
94  ti = av_gettime_relative();
95  d1 = 0;
96  for(it=0;it<NB_ITS;it++) {
97  for(y=0;y<HEIGHT-17;y++) {
98  for(x=0;x<WIDTH-17;x++) {
99  ptr = img2 + y * WIDTH + x;
100  d1 += test_func(NULL, img1, ptr, WIDTH, 8);
101  }
102  }
103  }
104  emms_c();
105  dummy = d1; /* avoid optimization */
106  ti = av_gettime_relative() - ti;
107 
108  printf(" %0.0f kop/s\n",
109  (double)NB_ITS * (WIDTH - 16) * (HEIGHT - 16) /
110  (double)(ti / 1000.0));
111 }
112 
113 
114 int main(int argc, char **argv)
115 {
117  int c;
118  MECmpContext cctx, mmxctx;
120  int flags_size = HAVE_MMXEXT ? 2 : 1;
121 
122  if (argc > 1) {
123  help();
124  return 1;
125  }
126 
127  printf("ffmpeg motion test\n");
128 
132  memset(&cctx, 0, sizeof(cctx));
133  ff_me_cmp_init(&cctx, ctx);
134  for (c = 0; c < flags_size; c++) {
135  int x;
137  memset(&mmxctx, 0, sizeof(mmxctx));
138  ff_me_cmp_init(&mmxctx, ctx);
139 
140  for (x = 0; x < 2; x++) {
141  printf("%s for %dx%d pixels\n", c ? "mmx2" : "mmx",
142  x ? 8 : 16, x ? 8 : 16);
143  test_motion("mmx", mmxctx.pix_abs[x][0], cctx.pix_abs[x][0]);
144  test_motion("mmx_x2", mmxctx.pix_abs[x][1], cctx.pix_abs[x][1]);
145  test_motion("mmx_y2", mmxctx.pix_abs[x][2], cctx.pix_abs[x][2]);
146  test_motion("mmx_xy2", mmxctx.pix_abs[x][3], cctx.pix_abs[x][3]);
147  }
148  }
149  av_free(ctx);
150 
151  return 0;
152 }
av_force_cpu_flags
void av_force_cpu_flags(int arg)
Disables cpu detection and forces the specified flags.
Definition: cpu.c:65
av_gettime_relative
int64_t av_gettime_relative(void)
Get the current time in microseconds since some unspecified starting point.
Definition: time.c:56
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_lfg_init
av_cold void av_lfg_init(AVLFG *c, unsigned int seed)
Definition: lfg.c:32
x
FFmpeg Automated Testing Environment ************************************Introduction Using FATE from your FFmpeg source directory Submitting the results to the FFmpeg result aggregation server Uploading new samples to the fate suite FATE makefile targets and variables Makefile targets Makefile variables Examples Introduction **************FATE is an extended regression suite on the client side and a means for results aggregation and presentation on the server side The first part of this document explains how you can use FATE from your FFmpeg source directory to test your ffmpeg binary The second part describes how you can run FATE to submit the results to FFmpeg’s FATE server In any way you can have a look at the publicly viewable FATE results by visiting this as it can be seen if some test on some platform broke with their recent contribution This usually happens on the platforms the developers could not test on The second part of this document describes how you can run FATE to submit your results to FFmpeg’s FATE server If you want to submit your results be sure to check that your combination of OS and compiler is not already listed on the above mentioned website In the third part you can find a comprehensive listing of FATE makefile targets and variables Using FATE from your FFmpeg source directory **********************************************If you want to run FATE on your machine you need to have the samples in place You can get the samples via the build target fate rsync Use this command from the top level source this will cause FATE to fail NOTE To use a custom wrapper to run the pass ‘ target exec’ to ‘configure’ or set the TARGET_EXEC Make variable Submitting the results to the FFmpeg result aggregation server ****************************************************************To submit your results to the server you should run fate through the shell script ‘tests fate sh’ from the FFmpeg sources This script needs to be invoked with a configuration file as its first argument tests fate sh path to fate_config A configuration file template with comments describing the individual configuration variables can be found at ‘doc fate_config sh template’ Create a configuration that suits your based on the configuration template The ‘slot’ configuration variable can be any string that is not yet but it is suggested that you name it adhering to the following pattern ‘ARCH OS COMPILER COMPILER VERSION’ The configuration file itself will be sourced in a shell therefore all shell features may be used This enables you to setup the environment as you need it for your build For your first test runs the ‘fate_recv’ variable should be empty or commented out This will run everything as normal except that it will omit the submission of the results to the server The following files should be present in $workdir as specified in the configuration it may help to try out the ‘ssh’ command with one or more ‘ v’ options You should get detailed output concerning your SSH configuration and the authentication process The only thing left is to automate the execution of the fate sh script and the synchronisation of the samples directory Uploading new samples to the fate suite *****************************************If you need a sample uploaded send a mail to samples request This is for developers who have an account on the fate suite server If you upload new please make sure they are as small as space on each network bandwidth and so on benefit from smaller test cases Also keep in mind older checkouts use existing sample that means in practice generally do not remove or overwrite files as it likely would break older checkouts or releases Also all needed samples for a commit should be ideally before the push If you need an account for frequently uploading samples or you wish to help others by doing that send a mail to ffmpeg devel rsync vauL Duo x
Definition: fate.txt:150
tab
static const struct twinvq_data tab
Definition: twinvq_data.h:11135
ff_me_cmp_init
av_cold void ff_me_cmp_init(MECmpContext *c, AVCodecContext *avctx)
Definition: me_cmp.c:1035
avcodec_alloc_context3
AVCodecContext * avcodec_alloc_context3(const AVCodec *codec)
Allocate an AVCodecContext and set its fields to default values.
Definition: options.c:157
emms_c
#define emms_c()
Definition: internal.h:55
av_lfg_get
static unsigned int av_lfg_get(AVLFG *c)
Get the next random unsigned 32-bit number using an ALFG.
Definition: lfg.h:53
AVFormatContext::flags
int flags
Flags modifying the (de)muxer behaviour.
Definition: avformat.h:1466
lfg.h
ctx
AVFormatContext * ctx
Definition: movenc.c:48
MECmpContext
Definition: me_cmp.h:53
NULL
#define NULL
Definition: coverity.c:32
HAVE_MMXEXT
#define HAVE_MMXEXT
Definition: config.h:64
time.h
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
img1
static uint8_t img1[WIDTH *HEIGHT]
Definition: motion.c:42
AVLFG
Context structure for the Lagged Fibonacci PRNG.
Definition: lfg.h:33
img2
static uint8_t img2[WIDTH *HEIGHT]
Definition: motion.c:43
size
int size
Definition: twinvq_data.h:11134
printf
printf("static const uint8_t my_array[100] = {\n")
MECmpContext::pix_abs
me_cmp_func pix_abs[2][4]
Definition: me_cmp.h:78
main
int main(int argc, char **argv)
Definition: motion.c:114
WIDTH
#define WIDTH
Definition: motion.c:39
i
#define i(width, name, range_min, range_max)
Definition: cbs_h2645.c:269
internal.h
uint8_t
uint8_t
Definition: audio_convert.c:194
me_cmp.h
AV_CPU_FLAG_MMX
#define AV_CPU_FLAG_MMX
standard MMX
Definition: cpu.h:31
AVCodecContext
main external API structure.
Definition: avcodec.h:526
help
static void help(void)
Definition: motion.c:56
fill_random
static void fill_random(uint8_t *tab, int size)
Definition: motion.c:45
NB_ITS
#define NB_ITS
Definition: motion.c:62
config.h
dummy
int dummy
Definition: motion.c:64
AV_CPU_FLAG_MMXEXT
#define AV_CPU_FLAG_MMXEXT
SSE integer functions or AMD MMX ext.
Definition: cpu.h:32
HEIGHT
#define HEIGHT
Definition: motion.c:40
mem.h
AV_CODEC_FLAG_BITEXACT
#define AV_CODEC_FLAG_BITEXACT
Use only bitexact stuff (except (I)DCT).
Definition: avcodec.h:333
it
s EdgeDetect Foobar g libavfilter vf_edgedetect c libavfilter vf_foobar c edit libavfilter and add an entry for foobar following the pattern of the other filters edit libavfilter allfilters and add an entry for foobar following the pattern of the other filters configure make j< whatever > ffmpeg ffmpeg i you should get a foobar png with Lena edge detected That s it
Definition: writing_filters.txt:31
test_motion
static void test_motion(const char *name, me_cmp_func test_func, me_cmp_func ref_func)
Definition: motion.c:66
av_free
#define av_free(p)
Definition: tableprint_vlc.h:34
me_cmp_func
int(* me_cmp_func)(struct MpegEncContext *c, uint8_t *blk1, uint8_t *blk2, ptrdiff_t stride, int h)
Definition: me_cmp.h:48
flags
#define flags(name, subs,...)
Definition: cbs_av1.c:564