diff options
Diffstat (limited to 'drivers/media/platform/vivid')
| -rw-r--r-- | drivers/media/platform/vivid/vivid-tpg.c | 40 |
1 files changed, 29 insertions, 11 deletions
diff --git a/drivers/media/platform/vivid/vivid-tpg.c b/drivers/media/platform/vivid/vivid-tpg.c index a7ead155a7d8..097d29995ec2 100644 --- a/drivers/media/platform/vivid/vivid-tpg.c +++ b/drivers/media/platform/vivid/vivid-tpg.c @@ -494,6 +494,14 @@ static void color_to_ycbcr(struct tpg_data *tpg, int r, int g, int b, { COEFF(-0.1396, 255), COEFF(-0.3604, 255), COEFF(0.5, 255) }, { COEFF(0.5, 255), COEFF(-0.4698, 255), COEFF(-0.0402, 255) }, }; + static const int bt2020c[4] = { + COEFF(1.0 / 1.9404, 224), COEFF(1.0 / 1.5816, 224), + COEFF(1.0 / 1.7184, 224), COEFF(1.0 / 0.9936, 224), + }; + static const int bt2020c_full[4] = { + COEFF(1.0 / 1.9404, 255), COEFF(1.0 / 1.5816, 255), + COEFF(1.0 / 1.7184, 255), COEFF(1.0 / 0.9936, 255), + }; bool full = tpg->real_quantization == V4L2_QUANTIZATION_FULL_RANGE; unsigned y_offset = full ? 0 : 16; @@ -513,15 +521,15 @@ static void color_to_ycbcr(struct tpg_data *tpg, int r, int g, int b, COEFF(0.6780, 255) * rec709_to_linear(g) + COEFF(0.0593, 255) * rec709_to_linear(b)) >> 16; yc = linear_to_rec709(lin_y); - *y = (yc * 219) / 255 + (16 << 4); + *y = full ? yc : (yc * 219) / 255 + (16 << 4); if (b <= yc) - *cb = (((b - yc) * COEFF(1.0 / 1.9404, 224)) >> 16) + (128 << 4); + *cb = (((b - yc) * (full ? bt2020c_full[0] : bt2020c[0])) >> 16) + (128 << 4); else - *cb = (((b - yc) * COEFF(1.0 / 1.5816, 224)) >> 16) + (128 << 4); + *cb = (((b - yc) * (full ? bt2020c_full[1] : bt2020c[1])) >> 16) + (128 << 4); if (r <= yc) - *cr = (((r - yc) * COEFF(1.0 / 1.7184, 224)) >> 16) + (128 << 4); + *cr = (((r - yc) * (full ? bt2020c_full[2] : bt2020c[2])) >> 16) + (128 << 4); else - *cr = (((r - yc) * COEFF(1.0 / 0.9936, 224)) >> 16) + (128 << 4); + *cr = (((r - yc) * (full ? bt2020c_full[3] : bt2020c[3])) >> 16) + (128 << 4); break; case V4L2_YCBCR_ENC_SMPTE240M: rgb2ycbcr(full ? smpte240m_full : smpte240m, r, g, b, y_offset, y, cb, cr); @@ -593,8 +601,18 @@ static void ycbcr_to_color(struct tpg_data *tpg, int y, int cb, int cr, { COEFF(1, 255), COEFF(-0.1646, 255), COEFF(-0.5714, 255) }, { COEFF(1, 255), COEFF(1.8814, 255), COEFF(0, 255) }, }; + static const int bt2020c[4] = { + COEFF(1.9404, 224), COEFF(1.5816, 224), + COEFF(1.7184, 224), COEFF(0.9936, 224), + }; + static const int bt2020c_full[4] = { + COEFF(1.9404, 255), COEFF(1.5816, 255), + COEFF(1.7184, 255), COEFF(0.9936, 255), + }; + bool full = tpg->real_quantization == V4L2_QUANTIZATION_FULL_RANGE; unsigned y_offset = full ? 0 : 16; + int y_fac = full ? COEFF(1.0, 255) : COEFF(1.0, 219); int lin_r, lin_g, lin_b, lin_y; switch (tpg->real_ycbcr_enc) { @@ -607,23 +625,23 @@ static void ycbcr_to_color(struct tpg_data *tpg, int y, int cb, int cr, ycbcr2rgb(full ? bt2020_full : bt2020, y, cb, cr, y_offset, r, g, b); break; case V4L2_YCBCR_ENC_BT2020_CONST_LUM: - y -= 16 << 4; + y -= full ? 0 : 16 << 4; cb -= 128 << 4; cr -= 128 << 4; if (cb <= 0) - *b = COEFF(1.0, 219) * y + COEFF(1.9404, 224) * cb; + *b = y_fac * y + (full ? bt2020c_full[0] : bt2020c[0]) * cb; else - *b = COEFF(1.0, 219) * y + COEFF(1.5816, 224) * cb; + *b = y_fac * y + (full ? bt2020c_full[1] : bt2020c[1]) * cb; *b = *b >> 12; if (cr <= 0) - *r = COEFF(1.0, 219) * y + COEFF(1.7184, 224) * cr; + *r = y_fac * y + (full ? bt2020c_full[2] : bt2020c[2]) * cr; else - *r = COEFF(1.0, 219) * y + COEFF(0.9936, 224) * cr; + *r = y_fac * y + (full ? bt2020c_full[3] : bt2020c[3]) * cr; *r = *r >> 12; lin_r = rec709_to_linear(*r); lin_b = rec709_to_linear(*b); - lin_y = rec709_to_linear((y * 255) / 219); + lin_y = rec709_to_linear((y * 255) / (full ? 255 : 219)); lin_g = COEFF(1.0 / 0.6780, 255) * lin_y - COEFF(0.2627 / 0.6780, 255) * lin_r - |