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video pattern generator: finished SMPTE bars

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It is not fully-conformant but the wiki description is rather vague and
it is eg. inpossible to represent a "superblack" color if we assume 0 as
a base black.
This commit is contained in:
Martin Pulec
2022-07-14 15:54:22 +02:00
parent 8f5d5b4ccd
commit a0458aa6dd
1 changed files with 45 additions and 1 deletions
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46
src/utils/video_pattern_generator.cpp
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@@ -233,6 +233,50 @@ class image_pattern_ebu_smpte_bars : public image_pattern {
}
return generator_depth::bits8;
}
friend class image_pattern_smpte_bars;
};
class image_pattern_smpte_bars : public image_pattern_ebu_smpte_bars<0xBFU, 7> {
static constexpr array bottom_bars{
uint32_t{0xFFU << 24U | 105 << 16U | 63 << 8U | 0U },
uint32_t{0xFFFFFFFFU },
uint32_t{0xFFU << 24U | 119U << 16U | 0U << 8U | 0U },
uint32_t{0xFF000000U },
uint32_t{0xFF000000U },
uint32_t{0xFF000000U },
};
enum generator_depth fill(int width, int height, unsigned char *data) override {
auto ret = image_pattern_ebu_smpte_bars<0xBFU, 7>::fill(width, height, data); // upper 2 3rds
assert(ret == generator_depth::bits8);
int columns = 7;
struct testcard_pixmap pixmap{ .w = width, .h = height, .data = data };
const int mid_strip_height = height / 3 - width / 6;
struct testcard_rect r{ .x = 0, .y = height / 3 * 2, .w = (width + columns - 1) / columns, .h = mid_strip_height};
for (int i = 0; i < columns; i += 1) {
r.x = i * r.w;
printf("Fill rect at %d,%d\n", r.x, r.y);
if (i % 2 == 1) testcard_fillRect(&pixmap, &r, 0);
else testcard_fillRect(&pixmap, &r, image_pattern_ebu_smpte_bars<0xBFU, 7>::bars.at(columns - 1 - i));
}
columns = 6;
r.w = (width + columns - 1) / columns;
r.h = width / 6;
r.y += mid_strip_height;
for (int i = 0; i < columns; i += 1) {
r.x = i * r.w;
printf("Fill rect at %d,%d\n", r.x, r.y);
testcard_fillRect(&pixmap, &r,
bottom_bars.at(i));
}
// pluge - skipping a "superblack" and black bar
r.x = 5 * (width / 7);
r.w = (width / 7) / 3;
r.x += 2 * r.w;
printf("Fill rect at %d,%d\n", r.x, r.y);
testcard_fillRect(&pixmap, &r,
0xFFU << 24 | 0x0A0A0A);
return generator_depth::bits8;
}
};
class image_pattern_blank : public image_pattern {
@@ -383,7 +427,7 @@ unique_ptr<image_pattern> image_pattern::create(string const &config) {
return make_unique<image_pattern_raw>(config.substr("raw=0x"s.length()));
}
if (config == "smpte_bars") {
return make_unique<image_pattern_ebu_smpte_bars<0xBFU, 7>>();
return make_unique<image_pattern_smpte_bars>();
}
if (config.substr(0, "0x"s.length()) == "0x") {
uint32_t blank_color = 0U;