FFmpeg
vf_convolution.c
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15  * with FFmpeg; if not, write to the Free Software Foundation, Inc.,
16  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
17  */
18 
19 #include <string.h>
20 #include "checkasm.h"
21 #include "libavfilter/avfilter.h"
23 #include "libavutil/intreadwrite.h"
24 #include "libavutil/mem_internal.h"
25 
26 #define WIDTH 512
27 #define HEIGHT 512
28 #define SRC_STRIDE 512
29 #define PIXELS (WIDTH * HEIGHT)
30 
31 #define randomize_buffers(buf, size) \
32  do { \
33  int j; \
34  uint8_t *tmp_buf = (uint8_t *)buf;\
35  for (j = 0; j< size; j++) \
36  tmp_buf[j] = rnd() & 0xFF; \
37  } while (0)
38 
39 static void check_sobel(const char * report_name)
40 {
41  LOCAL_ALIGNED_32(uint8_t, src, [PIXELS]);
42  LOCAL_ALIGNED_32(uint8_t, dst_ref, [PIXELS]);
43  LOCAL_ALIGNED_32(uint8_t, dst_new, [PIXELS]);
44  const int height = WIDTH;
45  const int width = HEIGHT;
46  const int stride = SRC_STRIDE;
47  const int dstride = SRC_STRIDE;
48  int mode = 0;
49  const uint8_t *c[49];
50  const int radius = 1;
51  const int bpc = 1;
52  const int step = mode == MATRIX_COLUMN ? 16 : 1;
53  const int slice_start = 0;
54  const int slice_end = height;
55  int y;
56  const int sizew = mode == MATRIX_COLUMN ? height : width;
57  float scale = 2;
58  float delta = 10;
59 
61 
62  declare_func(void, uint8_t *dst, int width, float scale, float delta, const int *const matrix,
63  const uint8_t *c[], int peak, int radius, int dstride, int stride, int size);
64 
65  s.scale = scale;
66  s.delta = delta;
67  s.depth = 8;
68  s.nb_planes = 3;
69  s.planes = 15;
70  ff_sobel_init(&s, s.depth, s.nb_planes);
71 
72  memset(dst_ref, 0, PIXELS);
73  memset(dst_new, 0, PIXELS);
75 
76  if (check_func(s.filter[0], "%s", report_name)) {
77  for (y = slice_start; y < slice_end; y += step) {
78  const int xoff = mode == MATRIX_COLUMN ? (y - slice_start) * bpc : radius * bpc;
79  const int yoff = mode == MATRIX_COLUMN ? radius * dstride : 0;
80 
81  s.setup[0](radius, c, src, stride, radius, width, y, height, bpc);
82  call_ref(dst_ref + yoff + xoff, sizew - 2 * radius,
83  scale, delta, NULL, c, 0, radius,
84  dstride, stride, slice_end - step);
85  call_new(dst_new + yoff + xoff, sizew - 2 * radius,
86  scale, delta, NULL, c, 0, radius,
87  dstride, stride, slice_end - step);
88  if (memcmp(dst_ref + yoff + xoff, dst_new + yoff + xoff, slice_end - step))
89  fail();
90  bench_new(dst_new + yoff + xoff, sizew - 2 * radius,
91  scale, delta, NULL, c, 0, radius,
92  dstride, stride, slice_end - step);
93  if (mode != MATRIX_COLUMN)
94  dst_ref += dstride;
95  }
96  }
97 
98 }
99 
101 {
102  check_sobel("sobel");
103  report("convolution:sobel");
104 }
mem_internal.h
matrix
Definition: vc1dsp.c:42
step
trying all byte sequences megabyte in length and selecting the best looking sequence will yield cases to try But a word about which is also called distortion Distortion can be quantified by almost any quality measurement one chooses the sum of squared differences is used but more complex methods that consider psychovisual effects can be used as well It makes no difference in this discussion First step
Definition: rate_distortion.txt:58
check_func
#define check_func(func,...)
Definition: checkasm.h:125
PIXELS
#define PIXELS
Definition: vf_convolution.c:29
call_ref
#define call_ref(...)
Definition: checkasm.h:140
ff_sobel_init
static av_unused void ff_sobel_init(ConvolutionContext *s, int depth, int nb_planes)
Definition: convolution.h:121
convolution.h
HEIGHT
#define HEIGHT
Definition: vf_convolution.c:27
fail
#define fail()
Definition: checkasm.h:134
checkasm.h
scale
static av_always_inline float scale(float x, float s)
Definition: vf_v360.c:1389
width
#define width
intreadwrite.h
s
#define s(width, name)
Definition: cbs_vp9.c:256
WIDTH
#define WIDTH
Definition: vf_convolution.c:26
slice_end
static int slice_end(AVCodecContext *avctx, AVFrame *pict)
Handle slice ends.
Definition: mpeg12dec.c:2013
call_new
#define call_new(...)
Definition: checkasm.h:222
NULL
#define NULL
Definition: coverity.c:32
LOCAL_ALIGNED_32
#define LOCAL_ALIGNED_32(t, v,...)
Definition: mem_internal.h:137
check_sobel
static void check_sobel(const char *report_name)
Definition: vf_convolution.c:39
ConvolutionContext
Definition: convolution.h:33
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
size
int size
Definition: twinvq_data.h:10344
height
#define height
report
#define report
Definition: checkasm.h:137
bench_new
#define bench_new(...)
Definition: checkasm.h:287
delta
float delta
Definition: vorbis_enc_data.h:430
checkasm_check_vf_sobel
void checkasm_check_vf_sobel(void)
Definition: vf_convolution.c:100
stride
#define stride
Definition: h264pred_template.c:537
mode
mode
Definition: ebur128.h:83
avfilter.h
MATRIX_COLUMN
@ MATRIX_COLUMN
Definition: convolution.h:29
randomize_buffers
#define randomize_buffers(buf, size)
Definition: vf_convolution.c:31
declare_func
#define declare_func(ret,...)
Definition: checkasm.h:129
src
INIT_CLIP pixel * src
Definition: h264pred_template.c:418
SRC_STRIDE
#define SRC_STRIDE
Definition: vf_convolution.c:28