FFmpeg: tests/checkasm/vf_convolution.c Source File

FFmpeg

[フレーム]

vf_convolution.c

Go to the documentation of this file.

1 /*

2 * This file is part of FFmpeg.

3 *

4 * FFmpeg is free software; you can redistribute it and/or modify

5 * it under the terms of the GNU General Public License as published by

6 * the Free Software Foundation; either version 2 of the License, or

7 * (at your option) any later version.

8 *

9 * FFmpeg is distributed in the hope that it will be useful,

10 * but WITHOUT ANY WARRANTY; without even the implied warranty of

11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the

12 * GNU General Public License for more details.

13 *

14 * You should have received a copy of the GNU General Public License along

15 * with FFmpeg; if not, write to the Free Software Foundation, Inc.,

16 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.

17 */

19 #include <string.h>

20 #include "checkasm.h"

21 #include "libavfilter/avfilter.h"

22 #include "libavfilter/convolution.h"

23 #include "libavutil/intreadwrite.h"

24 #include "libavutil/mem_internal.h"

26 #define WIDTH 512

27 #define HEIGHT 512

28 #define SRC_STRIDE 512

29 #define PIXELS (WIDTH * HEIGHT)

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)

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;

60 ConvolutionContext s;

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);

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);

72 memset(dst_ref, 0, PIXELS);

73 memset(dst_new, 0, PIXELS);

74 randomize_buffers(src, PIXELS);

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;

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 }

98 }

100 void checkasm_check_vf_sobel(void)

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

#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:2006

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:135

check_sobel

static void check_sobel(const char *report_name)

Definition: vf_convolution.c:39

ConvolutionContext

Definition: convolution.h:33

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