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mpv/test/gl_video.c

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vo_opengl: add gamma-auto option This automatically sets the gamma option depending on lighting conditions measured from the computer's ambient light sensor. sRGB – arguably the “sibling” to BT.709 for still images – has a reference viewing environment defined in its specification (IEC 61966-2-1:1999, see http://www.color.org/chardata/rgb/srgb.xalter). According to this data, the assumed ambient illuminance is 64 lux. This is the illuminance where the gamma that results from ICC color management is correct. On the other hand, BT.1886 formalizes that the gamma level for dim environments to be 2.40, and Apple resources (WWDC12: 2012 Session 523: Best practices for color management) define the BT.1886 dim at 16 lux. So the logic we apply is: * >= 64lux -> 1.961 gamma * =< 16lux -> 2.400 gamma * 16lux < x < 64lux -> logaritmic rescale of lux to gamma. The human perception of illuminance roughly follows a logaritmic scale of lux [1]. [1]: https://msdn.microsoft.com/en-us/library/windows/desktop/dd319008%28v=vs.85%29.aspx
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#include "test_helpers.h"
tests: fix include after 6597998
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#include "video/out/gpu/video.h"
vo_opengl: add gamma-auto option This automatically sets the gamma option depending on lighting conditions measured from the computer's ambient light sensor. sRGB – arguably the “sibling” to BT.709 for still images – has a reference viewing environment defined in its specification (IEC 61966-2-1:1999, see http://www.color.org/chardata/rgb/srgb.xalter). According to this data, the assumed ambient illuminance is 64 lux. This is the illuminance where the gamma that results from ICC color management is correct. On the other hand, BT.1886 formalizes that the gamma level for dim environments to be 2.40, and Apple resources (WWDC12: 2012 Session 523: Best practices for color management) define the BT.1886 dim at 16 lux. So the logic we apply is: * >= 64lux -> 1.961 gamma * =< 16lux -> 2.400 gamma * 16lux < x < 64lux -> logaritmic rescale of lux to gamma. The human perception of illuminance roughly follows a logaritmic scale of lux [1]. [1]: https://msdn.microsoft.com/en-us/library/windows/desktop/dd319008%28v=vs.85%29.aspx
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static void test_scale_ambient_lux_limits(void **state) {
float x;
x = gl_video_scale_ambient_lux(16.0, 64.0, 2.40, 1.961, 16.0);
test: fix cmocka assert_float_equal shadowing warnings Just use cmocka's function. It takes an epsilon argument, which we now provide directly. There's no assert_double_equal() in cmocka (and the float variant actually forces a conversion to the float type), but fortunately we didn't use it.
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assert_float_equal(x, 2.40f, FLT_EPSILON);
vo_opengl: add gamma-auto option This automatically sets the gamma option depending on lighting conditions measured from the computer's ambient light sensor. sRGB – arguably the “sibling” to BT.709 for still images – has a reference viewing environment defined in its specification (IEC 61966-2-1:1999, see http://www.color.org/chardata/rgb/srgb.xalter). According to this data, the assumed ambient illuminance is 64 lux. This is the illuminance where the gamma that results from ICC color management is correct. On the other hand, BT.1886 formalizes that the gamma level for dim environments to be 2.40, and Apple resources (WWDC12: 2012 Session 523: Best practices for color management) define the BT.1886 dim at 16 lux. So the logic we apply is: * >= 64lux -> 1.961 gamma * =< 16lux -> 2.400 gamma * 16lux < x < 64lux -> logaritmic rescale of lux to gamma. The human perception of illuminance roughly follows a logaritmic scale of lux [1]. [1]: https://msdn.microsoft.com/en-us/library/windows/desktop/dd319008%28v=vs.85%29.aspx
2015-02-07 12:54:18 +00:00
x = gl_video_scale_ambient_lux(16.0, 64.0, 2.40, 1.961, 64.0);
test: fix cmocka assert_float_equal shadowing warnings Just use cmocka's function. It takes an epsilon argument, which we now provide directly. There's no assert_double_equal() in cmocka (and the float variant actually forces a conversion to the float type), but fortunately we didn't use it.
2019-09-21 20:11:52 +00:00
assert_float_equal(x, 1.961f, FLT_EPSILON);
vo_opengl: add gamma-auto option This automatically sets the gamma option depending on lighting conditions measured from the computer's ambient light sensor. sRGB – arguably the “sibling” to BT.709 for still images – has a reference viewing environment defined in its specification (IEC 61966-2-1:1999, see http://www.color.org/chardata/rgb/srgb.xalter). According to this data, the assumed ambient illuminance is 64 lux. This is the illuminance where the gamma that results from ICC color management is correct. On the other hand, BT.1886 formalizes that the gamma level for dim environments to be 2.40, and Apple resources (WWDC12: 2012 Session 523: Best practices for color management) define the BT.1886 dim at 16 lux. So the logic we apply is: * >= 64lux -> 1.961 gamma * =< 16lux -> 2.400 gamma * 16lux < x < 64lux -> logaritmic rescale of lux to gamma. The human perception of illuminance roughly follows a logaritmic scale of lux [1]. [1]: https://msdn.microsoft.com/en-us/library/windows/desktop/dd319008%28v=vs.85%29.aspx
2015-02-07 12:54:18 +00:00
}
static void test_scale_ambient_lux_sign(void **state) {
float x;
x = gl_video_scale_ambient_lux(16.0, 64.0, 1.961, 2.40, 64.0);
test: fix cmocka assert_float_equal shadowing warnings Just use cmocka's function. It takes an epsilon argument, which we now provide directly. There's no assert_double_equal() in cmocka (and the float variant actually forces a conversion to the float type), but fortunately we didn't use it.
2019-09-21 20:11:52 +00:00
assert_float_equal(x, 2.40f, FLT_EPSILON);
vo_opengl: add gamma-auto option This automatically sets the gamma option depending on lighting conditions measured from the computer's ambient light sensor. sRGB – arguably the “sibling” to BT.709 for still images – has a reference viewing environment defined in its specification (IEC 61966-2-1:1999, see http://www.color.org/chardata/rgb/srgb.xalter). According to this data, the assumed ambient illuminance is 64 lux. This is the illuminance where the gamma that results from ICC color management is correct. On the other hand, BT.1886 formalizes that the gamma level for dim environments to be 2.40, and Apple resources (WWDC12: 2012 Session 523: Best practices for color management) define the BT.1886 dim at 16 lux. So the logic we apply is: * >= 64lux -> 1.961 gamma * =< 16lux -> 2.400 gamma * 16lux < x < 64lux -> logaritmic rescale of lux to gamma. The human perception of illuminance roughly follows a logaritmic scale of lux [1]. [1]: https://msdn.microsoft.com/en-us/library/windows/desktop/dd319008%28v=vs.85%29.aspx
2015-02-07 12:54:18 +00:00
}
static void test_scale_ambient_lux_clamping(void **state) {
float x;
x = gl_video_scale_ambient_lux(16.0, 64.0, 2.40, 1.961, 0.0);
test: fix cmocka assert_float_equal shadowing warnings Just use cmocka's function. It takes an epsilon argument, which we now provide directly. There's no assert_double_equal() in cmocka (and the float variant actually forces a conversion to the float type), but fortunately we didn't use it.
2019-09-21 20:11:52 +00:00
assert_float_equal(x, 2.40f, FLT_EPSILON);
vo_opengl: add gamma-auto option This automatically sets the gamma option depending on lighting conditions measured from the computer's ambient light sensor. sRGB – arguably the “sibling” to BT.709 for still images – has a reference viewing environment defined in its specification (IEC 61966-2-1:1999, see http://www.color.org/chardata/rgb/srgb.xalter). According to this data, the assumed ambient illuminance is 64 lux. This is the illuminance where the gamma that results from ICC color management is correct. On the other hand, BT.1886 formalizes that the gamma level for dim environments to be 2.40, and Apple resources (WWDC12: 2012 Session 523: Best practices for color management) define the BT.1886 dim at 16 lux. So the logic we apply is: * >= 64lux -> 1.961 gamma * =< 16lux -> 2.400 gamma * 16lux < x < 64lux -> logaritmic rescale of lux to gamma. The human perception of illuminance roughly follows a logaritmic scale of lux [1]. [1]: https://msdn.microsoft.com/en-us/library/windows/desktop/dd319008%28v=vs.85%29.aspx
2015-02-07 12:54:18 +00:00
}
static void test_scale_ambient_lux_log10_midpoint(void **state) {
float x;
// 32 corresponds to the the midpoint after converting lux to the log10 scale
x = gl_video_scale_ambient_lux(16.0, 64.0, 2.40, 1.961, 32.0);
float mid_gamma = (2.40 - 1.961) / 2 + 1.961;
test: fix cmocka assert_float_equal shadowing warnings Just use cmocka's function. It takes an epsilon argument, which we now provide directly. There's no assert_double_equal() in cmocka (and the float variant actually forces a conversion to the float type), but fortunately we didn't use it.
2019-09-21 20:11:52 +00:00
assert_float_equal(x, mid_gamma, FLT_EPSILON);
vo_opengl: add gamma-auto option This automatically sets the gamma option depending on lighting conditions measured from the computer's ambient light sensor. sRGB – arguably the “sibling” to BT.709 for still images – has a reference viewing environment defined in its specification (IEC 61966-2-1:1999, see http://www.color.org/chardata/rgb/srgb.xalter). According to this data, the assumed ambient illuminance is 64 lux. This is the illuminance where the gamma that results from ICC color management is correct. On the other hand, BT.1886 formalizes that the gamma level for dim environments to be 2.40, and Apple resources (WWDC12: 2012 Session 523: Best practices for color management) define the BT.1886 dim at 16 lux. So the logic we apply is: * >= 64lux -> 1.961 gamma * =< 16lux -> 2.400 gamma * 16lux < x < 64lux -> logaritmic rescale of lux to gamma. The human perception of illuminance roughly follows a logaritmic scale of lux [1]. [1]: https://msdn.microsoft.com/en-us/library/windows/desktop/dd319008%28v=vs.85%29.aspx
2015-02-07 12:54:18 +00:00
}
int main(void) {
test: update cmocka version to 1.0
2015-06-12 17:31:55 +00:00
const struct CMUnitTest tests[] = {
cmocka_unit_test(test_scale_ambient_lux_limits),
cmocka_unit_test(test_scale_ambient_lux_sign),
cmocka_unit_test(test_scale_ambient_lux_clamping),
cmocka_unit_test(test_scale_ambient_lux_log10_midpoint),
vo_opengl: add gamma-auto option This automatically sets the gamma option depending on lighting conditions measured from the computer's ambient light sensor. sRGB – arguably the “sibling” to BT.709 for still images – has a reference viewing environment defined in its specification (IEC 61966-2-1:1999, see http://www.color.org/chardata/rgb/srgb.xalter). According to this data, the assumed ambient illuminance is 64 lux. This is the illuminance where the gamma that results from ICC color management is correct. On the other hand, BT.1886 formalizes that the gamma level for dim environments to be 2.40, and Apple resources (WWDC12: 2012 Session 523: Best practices for color management) define the BT.1886 dim at 16 lux. So the logic we apply is: * >= 64lux -> 1.961 gamma * =< 16lux -> 2.400 gamma * 16lux < x < 64lux -> logaritmic rescale of lux to gamma. The human perception of illuminance roughly follows a logaritmic scale of lux [1]. [1]: https://msdn.microsoft.com/en-us/library/windows/desktop/dd319008%28v=vs.85%29.aspx
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};
test: update cmocka version to 1.0
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return cmocka_run_group_tests(tests, NULL, NULL);
vo_opengl: add gamma-auto option This automatically sets the gamma option depending on lighting conditions measured from the computer's ambient light sensor. sRGB – arguably the “sibling” to BT.709 for still images – has a reference viewing environment defined in its specification (IEC 61966-2-1:1999, see http://www.color.org/chardata/rgb/srgb.xalter). According to this data, the assumed ambient illuminance is 64 lux. This is the illuminance where the gamma that results from ICC color management is correct. On the other hand, BT.1886 formalizes that the gamma level for dim environments to be 2.40, and Apple resources (WWDC12: 2012 Session 523: Best practices for color management) define the BT.1886 dim at 16 lux. So the logic we apply is: * >= 64lux -> 1.961 gamma * =< 16lux -> 2.400 gamma * 16lux < x < 64lux -> logaritmic rescale of lux to gamma. The human perception of illuminance roughly follows a logaritmic scale of lux [1]. [1]: https://msdn.microsoft.com/en-us/library/windows/desktop/dd319008%28v=vs.85%29.aspx
2015-02-07 12:54:18 +00:00
}
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