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feat(isp): add gamma correction driver to ISP

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Song Ruo Jing
2024-07-22 22:08:02 +08:00
parent 2884ce0eac
commit f2d131aae4
12 changed files with 473 additions and 539 deletions
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71
components/hal/esp32p4/include/hal/isp_ll.h
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@@ -1543,6 +1543,77 @@ static inline void isp_ll_yuv_set_std(isp_dev_t *hw, isp_yuv_conv_std_t std)
hw->yuv_format.yuv_mode = std;
}
/*---------------------------------------------------------------
Gamma Correction
---------------------------------------------------------------*/
/**
* @brief Enable / Disable gamma
*
* @param[in] hw Hardware instance address
* @param[in] enable Enable / Disable
*/
static inline void isp_ll_gamma_enable(isp_dev_t *hw, bool enable)
{
hw->cntl.gamma_en = enable;
}
/**
* @brief Set gamma correction curve for one of the R/G/B components
*
* @param[in] hw Hardware instance address
* @param[in] channel One of the R/G/B components, color_component_t
* @param[in] pts Pointer to the structure that contains the information of the gamma curve
*/
__attribute__((always_inline))
static inline void isp_ll_gamma_set_correction_curve(isp_dev_t *hw, color_component_t channel, const isp_gamma_curve_points_t *pts)
{
int ch_index = -1;
switch (channel) {
case COLOR_COMPONENT_R:
ch_index = 0;
break;
case COLOR_COMPONENT_G:
ch_index = 1;
break;
case COLOR_COMPONENT_B:
ch_index = 2;
break;
default:
abort();
}
uint32_t x_prev = 0;
uint32_t gamma_x1 = 0, gamma_x2 = 0, gamma_y1 = 0, gamma_y2 = 0, gamma_y3 = 0, gamma_y4 = 0;
for (int i = 0; i < ISP_GAMMA_CURVE_POINTS_NUM; i++) {
uint32_t x_delta = (i == (ISP_GAMMA_CURVE_POINTS_NUM - 1) ? 256 : pts->pt[i].x) - x_prev;
uint32_t power = __builtin_ctz(x_delta);
HAL_ASSERT((x_delta & (x_delta - 1)) == 0 && power < 8);
if (i < 4) {
gamma_x1 |= (power << (21 - i * 3));
gamma_y1 |= (pts->pt[i].y << (24 - i * 8));
} else if (i < 8) {
gamma_x1 |= (power << (21 - i * 3));
gamma_y2 |= (pts->pt[i].y << (24 - (i - 4) * 8));
} else if (i < 12) {
gamma_x2 |= (power << (21 - (i - 8) * 3));
gamma_y3 |= (pts->pt[i].y << (24 - (i - 8) * 8));
} else {
gamma_x2 |= (power << (21 - (i - 8) * 3));
gamma_y4 |= (pts->pt[i].y << (24 - (i - 12) * 8));
}
x_prev = pts->pt[i].x;
}
hw->gamma_rgb_x[ch_index].gamma_x1.val = gamma_x1;
hw->gamma_rgb_x[ch_index].gamma_x2.val = gamma_x2;
hw->gamma_rgb_y[ch_index].gamma_y1.val = gamma_y1;
hw->gamma_rgb_y[ch_index].gamma_y2.val = gamma_y2;
hw->gamma_rgb_y[ch_index].gamma_y3.val = gamma_y3;
hw->gamma_rgb_y[ch_index].gamma_y4.val = gamma_y4;
hw->gamma_ctrl.gamma_update = 1;
while (hw->gamma_ctrl.gamma_update);
}
#ifdef __cplusplus
}
#endif