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// SPDX-License-Identifier: GPL-2.0+
#include <kunit/test.h>
#include <drm/drm_fixed.h>
#include <drm/drm_fourcc.h>
#include "../../drm_crtc_internal.h"
#include "../vkms_formats.h"
#define TEST_BUFF_SIZE 50
MODULE_IMPORT_NS("EXPORTED_FOR_KUNIT_TESTING");
/**
* struct pixel_yuv_u8 - Internal representation of a pixel color.
* @y: Luma value, stored in 8 bits, without padding, using
* machine endianness
* @u: Blue difference chroma value, stored in 8 bits, without padding, using
* machine endianness
* @v: Red difference chroma value, stored in 8 bits, without padding, using
* machine endianness
*/
struct pixel_yuv_u8 {
u8 y, u, v;
};
/*
* struct yuv_u8_to_argb_u16_case - Reference values to test the color
* conversions in VKMS between YUV to ARGB
*
* @encoding: Encoding used to convert RGB to YUV
* @range: Range used to convert RGB to YUV
* @n_colors: Count of test colors in this case
* @format_pair.name: Name used for this color conversion, used to
* clarify the test results
* @format_pair.rgb: RGB color tested
* @format_pair.yuv: Same color as @format_pair.rgb, but converted to
* YUV using @encoding and @range.
*/
struct yuv_u8_to_argb_u16_case {
enum drm_color_encoding encoding;
enum drm_color_range range;
size_t n_colors;
struct format_pair {
char *name;
struct pixel_yuv_u8 yuv;
struct pixel_argb_u16 argb;
} colors[TEST_BUFF_SIZE];
};
/*
* The YUV color representation were acquired via the colour python framework.
* Below are the function calls used for generating each case.
*
* For more information got to the docs:
* https://colour.readthedocs.io/en/master/generated/colour.RGB_to_YCbCr.html
*/
static struct yuv_u8_to_argb_u16_case yuv_u8_to_argb_u16_cases[] = {
/*
* colour.RGB_to_YCbCr(<rgb color in 16 bit form>,
* K=colour.WEIGHTS_YCBCR["ITU-R BT.601"],
* in_bits = 16,
* in_legal = False,
* in_int = True,
* out_bits = 8,
* out_legal = False,
* out_int = True)
*
* Tests cases for color conversion generated by converting RGB
* values to YUV BT601 full range using the ITU-R BT.601 weights.
*/
{
.encoding = DRM_COLOR_YCBCR_BT601,
.range = DRM_COLOR_YCBCR_FULL_RANGE,
.n_colors = 6,
.colors = {
{ "white", { 0xff, 0x80, 0x80 }, { 0xffff, 0xffff, 0xffff, 0xffff }},
{ "gray", { 0x80, 0x80, 0x80 }, { 0xffff, 0x8080, 0x8080, 0x8080 }},
{ "black", { 0x00, 0x80, 0x80 }, { 0xffff, 0x0000, 0x0000, 0x0000 }},
{ "red", { 0x4c, 0x55, 0xff }, { 0xffff, 0xffff, 0x0000, 0x0000 }},
{ "green", { 0x96, 0x2c, 0x15 }, { 0xffff, 0x0000, 0xffff, 0x0000 }},
{ "blue", { 0x1d, 0xff, 0x6b }, { 0xffff, 0x0000, 0x0000, 0xffff }},
},
},
/*
* colour.RGB_to_YCbCr(<rgb color in 16 bit form>,
* K=colour.WEIGHTS_YCBCR["ITU-R BT.601"],
* in_bits = 16,
* in_legal = False,
* in_int = True,
* out_bits = 8,
* out_legal = True,
* out_int = True)
* Tests cases for color conversion generated by converting RGB
* values to YUV BT601 limited range using the ITU-R BT.601 weights.
*/
{
.encoding = DRM_COLOR_YCBCR_BT601,
.range = DRM_COLOR_YCBCR_LIMITED_RANGE,
.n_colors = 6,
.colors = {
{ "white", { 0xeb, 0x80, 0x80 }, { 0xffff, 0xffff, 0xffff, 0xffff }},
{ "gray", { 0x7e, 0x80, 0x80 }, { 0xffff, 0x8080, 0x8080, 0x8080 }},
{ "black", { 0x10, 0x80, 0x80 }, { 0xffff, 0x0000, 0x0000, 0x0000 }},
{ "red", { 0x51, 0x5a, 0xf0 }, { 0xffff, 0xffff, 0x0000, 0x0000 }},
{ "green", { 0x91, 0x36, 0x22 }, { 0xffff, 0x0000, 0xffff, 0x0000 }},
{ "blue", { 0x29, 0xf0, 0x6e }, { 0xffff, 0x0000, 0x0000, 0xffff }},
},
},
/*
* colour.RGB_to_YCbCr(<rgb color in 16 bit form>,
* K=colour.WEIGHTS_YCBCR["ITU-R BT.709"],
* in_bits = 16,
* in_legal = False,
* in_int = True,
* out_bits = 8,
* out_legal = False,
* out_int = True)
* Tests cases for color conversion generated by converting RGB
* values to YUV BT709 full range using the ITU-R BT.709 weights.
*/
{
.encoding = DRM_COLOR_YCBCR_BT709,
.range = DRM_COLOR_YCBCR_FULL_RANGE,
.n_colors = 6,
.colors = {
{ "white", { 0xff, 0x80, 0x80 }, { 0xffff, 0xffff, 0xffff, 0xffff }},
{ "gray", { 0x80, 0x80, 0x80 }, { 0xffff, 0x8080, 0x8080, 0x8080 }},
{ "black", { 0x00, 0x80, 0x80 }, { 0xffff, 0x0000, 0x0000, 0x0000 }},
{ "red", { 0x36, 0x63, 0xff }, { 0xffff, 0xffff, 0x0000, 0x0000 }},
{ "green", { 0xb6, 0x1e, 0x0c }, { 0xffff, 0x0000, 0xffff, 0x0000 }},
{ "blue", { 0x12, 0xff, 0x74 }, { 0xffff, 0x0000, 0x0000, 0xffff }},
},
},
/*
* colour.RGB_to_YCbCr(<rgb color in 16 bit form>,
* K=colour.WEIGHTS_YCBCR["ITU-R BT.709"],
* in_bits = 16,
* int_legal = False,
* in_int = True,
* out_bits = 8,
* out_legal = True,
* out_int = True)
* Tests cases for color conversion generated by converting RGB
* values to YUV BT709 limited range using the ITU-R BT.709 weights.
*/
{
.encoding = DRM_COLOR_YCBCR_BT709,
.range = DRM_COLOR_YCBCR_LIMITED_RANGE,
.n_colors = 6,
.colors = {
{ "white", { 0xeb, 0x80, 0x80 }, { 0xffff, 0xffff, 0xffff, 0xffff }},
{ "gray", { 0x7e, 0x80, 0x80 }, { 0xffff, 0x8080, 0x8080, 0x8080 }},
{ "black", { 0x10, 0x80, 0x80 }, { 0xffff, 0x0000, 0x0000, 0x0000 }},
{ "red", { 0x3f, 0x66, 0xf0 }, { 0xffff, 0xffff, 0x0000, 0x0000 }},
{ "green", { 0xad, 0x2a, 0x1a }, { 0xffff, 0x0000, 0xffff, 0x0000 }},
{ "blue", { 0x20, 0xf0, 0x76 }, { 0xffff, 0x0000, 0x0000, 0xffff }},
},
},
/*
* colour.RGB_to_YCbCr(<rgb color in 16 bit form>,
* K=colour.WEIGHTS_YCBCR["ITU-R BT.2020"],
* in_bits = 16,
* in_legal = False,
* in_int = True,
* out_bits = 8,
* out_legal = False,
* out_int = True)
* Tests cases for color conversion generated by converting RGB
* values to YUV BT2020 full range using the ITU-R BT.2020 weights.
*/
{
.encoding = DRM_COLOR_YCBCR_BT2020,
.range = DRM_COLOR_YCBCR_FULL_RANGE,
.n_colors = 6,
.colors = {
{ "white", { 0xff, 0x80, 0x80 }, { 0xffff, 0xffff, 0xffff, 0xffff }},
{ "gray", { 0x80, 0x80, 0x80 }, { 0xffff, 0x8080, 0x8080, 0x8080 }},
{ "black", { 0x00, 0x80, 0x80 }, { 0xffff, 0x0000, 0x0000, 0x0000 }},
{ "red", { 0x43, 0x5c, 0xff }, { 0xffff, 0xffff, 0x0000, 0x0000 }},
{ "green", { 0xad, 0x24, 0x0b }, { 0xffff, 0x0000, 0xffff, 0x0000 }},
{ "blue", { 0x0f, 0xff, 0x76 }, { 0xffff, 0x0000, 0x0000, 0xffff }},
},
},
/*
* colour.RGB_to_YCbCr(<rgb color in 16 bit form>,
* K=colour.WEIGHTS_YCBCR["ITU-R BT.2020"],
* in_bits = 16,
* in_legal = False,
* in_int = True,
* out_bits = 8,
* out_legal = True,
* out_int = True)
* Tests cases for color conversion generated by converting RGB
* values to YUV BT2020 limited range using the ITU-R BT.2020 weights.
*/
{
.encoding = DRM_COLOR_YCBCR_BT2020,
.range = DRM_COLOR_YCBCR_LIMITED_RANGE,
.n_colors = 6,
.colors = {
{ "white", { 0xeb, 0x80, 0x80 }, { 0xffff, 0xffff, 0xffff, 0xffff }},
{ "gray", { 0x7e, 0x80, 0x80 }, { 0xffff, 0x8080, 0x8080, 0x8080 }},
{ "black", { 0x10, 0x80, 0x80 }, { 0xffff, 0x0000, 0x0000, 0x0000 }},
{ "red", { 0x4a, 0x61, 0xf0 }, { 0xffff, 0xffff, 0x0000, 0x0000 }},
{ "green", { 0xa4, 0x2f, 0x19 }, { 0xffff, 0x0000, 0xffff, 0x0000 }},
{ "blue", { 0x1d, 0xf0, 0x77 }, { 0xffff, 0x0000, 0x0000, 0xffff }},
},
},
};
/*
* vkms_format_test_yuv_u8_to_argb_u16 - Testing the conversion between YUV
* colors to ARGB colors in VKMS
*
* This test will use the functions get_conversion_matrix_to_argb_u16 and
* argb_u16_from_yuv888 to convert YUV colors (stored in
* yuv_u8_to_argb_u16_cases) into ARGB colors.
*
* The conversion between YUV and RGB is not totally reversible, so there may be
* some difference between the expected value and the result.
* In addition, there may be some rounding error as the input color is 8 bits
* and output color is 16 bits.
*/
static void vkms_format_test_yuv_u8_to_argb_u16(struct kunit *test)
{
const struct yuv_u8_to_argb_u16_case *param = test->param_value;
struct pixel_argb_u16 argb;
for (size_t i = 0; i < param->n_colors; i++) {
const struct format_pair *color = ¶m->colors[i];
struct conversion_matrix matrix;
get_conversion_matrix_to_argb_u16
(DRM_FORMAT_NV12, param->encoding, param->range, &matrix);
argb = argb_u16_from_yuv888(color->yuv.y, color->yuv.u, color->yuv.v, &matrix);
KUNIT_EXPECT_LE_MSG(test, abs_diff(argb.a, color->argb.a), 0x1ff,
"On the A channel of the color %s expected 0x%04x, got 0x%04x",
color->name, color->argb.a, argb.a);
KUNIT_EXPECT_LE_MSG(test, abs_diff(argb.r, color->argb.r), 0x1ff,
"On the R channel of the color %s expected 0x%04x, got 0x%04x",
color->name, color->argb.r, argb.r);
KUNIT_EXPECT_LE_MSG(test, abs_diff(argb.g, color->argb.g), 0x1ff,
"On the G channel of the color %s expected 0x%04x, got 0x%04x",
color->name, color->argb.g, argb.g);
KUNIT_EXPECT_LE_MSG(test, abs_diff(argb.b, color->argb.b), 0x1ff,
"On the B channel of the color %s expected 0x%04x, got 0x%04x",
color->name, color->argb.b, argb.b);
}
}
static void vkms_format_test_yuv_u8_to_argb_u16_case_desc(struct yuv_u8_to_argb_u16_case *t,
char *desc)
{
snprintf(desc, KUNIT_PARAM_DESC_SIZE, "%s - %s",
drm_get_color_encoding_name(t->encoding), drm_get_color_range_name(t->range));
}
KUNIT_ARRAY_PARAM(yuv_u8_to_argb_u16, yuv_u8_to_argb_u16_cases,
vkms_format_test_yuv_u8_to_argb_u16_case_desc
);
static struct kunit_case vkms_format_test_cases[] = {
KUNIT_CASE_PARAM(vkms_format_test_yuv_u8_to_argb_u16, yuv_u8_to_argb_u16_gen_params),
{}
};
static struct kunit_suite vkms_format_test_suite = {
.name = "vkms-format",
.test_cases = vkms_format_test_cases,
};
kunit_test_suite(vkms_format_test_suite);
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("Kunit test for vkms format conversion");
|
