410 lines
8.9 KiB
C
410 lines
8.9 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright (C) 2019 Mentor Graphics Inc.
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*/
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#include <linux/types.h>
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#include <linux/init.h>
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#include <linux/errno.h>
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#include <linux/err.h>
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#include <linux/sizes.h>
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#include "ipu-prv.h"
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#define QUANT_MAP(q) \
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((q) == V4L2_QUANTIZATION_FULL_RANGE || \
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(q) == V4L2_QUANTIZATION_DEFAULT ? 0 : 1)
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/* identity matrix */
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static const struct ipu_ic_csc_params identity = {
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.coeff = {
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{ 128, 0, 0, },
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{ 0, 128, 0, },
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{ 0, 0, 128, },
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},
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.offset = { 0, 0, 0, },
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.scale = 2,
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};
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/*
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* RGB full-range to RGB limited-range
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*
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* R_lim = 0.8588 * R_full + 16
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* G_lim = 0.8588 * G_full + 16
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* B_lim = 0.8588 * B_full + 16
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*/
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static const struct ipu_ic_csc_params rgbf2rgbl = {
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.coeff = {
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{ 220, 0, 0, },
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{ 0, 220, 0, },
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{ 0, 0, 220, },
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},
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.offset = { 64, 64, 64, },
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.scale = 1,
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};
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/*
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* RGB limited-range to RGB full-range
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*
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* R_full = 1.1644 * (R_lim - 16)
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* G_full = 1.1644 * (G_lim - 16)
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* B_full = 1.1644 * (B_lim - 16)
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*/
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static const struct ipu_ic_csc_params rgbl2rgbf = {
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.coeff = {
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{ 149, 0, 0, },
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{ 0, 149, 0, },
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{ 0, 0, 149, },
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},
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.offset = { -37, -37, -37, },
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.scale = 2,
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};
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/*
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* YUV full-range to YUV limited-range
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*
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* Y_lim = 0.8588 * Y_full + 16
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* Cb_lim = 0.8784 * (Cb_full - 128) + 128
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* Cr_lim = 0.8784 * (Cr_full - 128) + 128
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*/
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static const struct ipu_ic_csc_params yuvf2yuvl = {
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.coeff = {
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{ 220, 0, 0, },
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{ 0, 225, 0, },
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{ 0, 0, 225, },
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},
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.offset = { 64, 62, 62, },
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.scale = 1,
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.sat = true,
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};
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/*
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* YUV limited-range to YUV full-range
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*
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* Y_full = 1.1644 * (Y_lim - 16)
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* Cb_full = 1.1384 * (Cb_lim - 128) + 128
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* Cr_full = 1.1384 * (Cr_lim - 128) + 128
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*/
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static const struct ipu_ic_csc_params yuvl2yuvf = {
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.coeff = {
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{ 149, 0, 0, },
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{ 0, 146, 0, },
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{ 0, 0, 146, },
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},
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.offset = { -37, -35, -35, },
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.scale = 2,
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};
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static const struct ipu_ic_csc_params *rgb2rgb[] = {
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&identity,
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&rgbf2rgbl,
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&rgbl2rgbf,
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&identity,
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};
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static const struct ipu_ic_csc_params *yuv2yuv[] = {
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&identity,
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&yuvf2yuvl,
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&yuvl2yuvf,
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&identity,
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};
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/*
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* BT.601 RGB full-range to YUV full-range
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*
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* Y = .2990 * R + .5870 * G + .1140 * B
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* U = -.1687 * R - .3313 * G + .5000 * B + 128
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* V = .5000 * R - .4187 * G - .0813 * B + 128
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*/
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static const struct ipu_ic_csc_params rgbf2yuvf_601 = {
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.coeff = {
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{ 77, 150, 29, },
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{ -43, -85, 128, },
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{ 128, -107, -21, },
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},
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.offset = { 0, 512, 512, },
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.scale = 1,
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};
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/* BT.601 RGB full-range to YUV limited-range */
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static const struct ipu_ic_csc_params rgbf2yuvl_601 = {
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.coeff = {
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{ 66, 129, 25, },
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{ -38, -74, 112, },
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{ 112, -94, -18, },
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},
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.offset = { 64, 512, 512, },
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.scale = 1,
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.sat = true,
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};
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/* BT.601 RGB limited-range to YUV full-range */
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static const struct ipu_ic_csc_params rgbl2yuvf_601 = {
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.coeff = {
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{ 89, 175, 34, },
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{ -50, -99, 149, },
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{ 149, -125, -24, },
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},
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.offset = { -75, 512, 512, },
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.scale = 1,
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};
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/* BT.601 RGB limited-range to YUV limited-range */
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static const struct ipu_ic_csc_params rgbl2yuvl_601 = {
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.coeff = {
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{ 77, 150, 29, },
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{ -44, -87, 131, },
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{ 131, -110, -21, },
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},
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.offset = { 0, 512, 512, },
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.scale = 1,
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.sat = true,
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};
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/*
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* BT.601 YUV full-range to RGB full-range
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*
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* R = 1. * Y + 0 * (Cb - 128) + 1.4020 * (Cr - 128)
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* G = 1. * Y - .3441 * (Cb - 128) - .7141 * (Cr - 128)
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* B = 1. * Y + 1.7720 * (Cb - 128) + 0 * (Cr - 128)
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*
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* equivalently (factoring out the offsets):
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*
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* R = 1. * Y + 0 * Cb + 1.4020 * Cr - 179.456
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* G = 1. * Y - .3441 * Cb - .7141 * Cr + 135.450
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* B = 1. * Y + 1.7720 * Cb + 0 * Cr - 226.816
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*/
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static const struct ipu_ic_csc_params yuvf2rgbf_601 = {
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.coeff = {
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{ 128, 0, 179, },
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{ 128, -44, -91, },
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{ 128, 227, 0, },
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},
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.offset = { -359, 271, -454, },
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.scale = 2,
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};
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/* BT.601 YUV full-range to RGB limited-range */
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static const struct ipu_ic_csc_params yuvf2rgbl_601 = {
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.coeff = {
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{ 110, 0, 154, },
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{ 110, -38, -78, },
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{ 110, 195, 0, },
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},
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.offset = { -276, 265, -358, },
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.scale = 2,
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};
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/* BT.601 YUV limited-range to RGB full-range */
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static const struct ipu_ic_csc_params yuvl2rgbf_601 = {
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.coeff = {
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{ 75, 0, 102, },
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{ 75, -25, -52, },
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{ 75, 129, 0, },
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},
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.offset = { -223, 136, -277, },
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.scale = 3,
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};
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/* BT.601 YUV limited-range to RGB limited-range */
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static const struct ipu_ic_csc_params yuvl2rgbl_601 = {
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.coeff = {
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{ 128, 0, 175, },
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{ 128, -43, -89, },
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{ 128, 222, 0, },
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},
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.offset = { -351, 265, -443, },
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.scale = 2,
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};
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static const struct ipu_ic_csc_params *rgb2yuv_601[] = {
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&rgbf2yuvf_601,
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&rgbf2yuvl_601,
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&rgbl2yuvf_601,
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&rgbl2yuvl_601,
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};
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static const struct ipu_ic_csc_params *yuv2rgb_601[] = {
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&yuvf2rgbf_601,
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&yuvf2rgbl_601,
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&yuvl2rgbf_601,
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&yuvl2rgbl_601,
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};
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/*
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* REC.709 encoding from RGB full range to YUV full range:
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*
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* Y = .2126 * R + .7152 * G + .0722 * B
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* U = -.1146 * R - .3854 * G + .5000 * B + 128
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* V = .5000 * R - .4542 * G - .0458 * B + 128
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*/
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static const struct ipu_ic_csc_params rgbf2yuvf_709 = {
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.coeff = {
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{ 54, 183, 19 },
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{ -29, -99, 128 },
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{ 128, -116, -12 },
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},
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.offset = { 0, 512, 512 },
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.scale = 1,
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};
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/* Rec.709 RGB full-range to YUV limited-range */
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static const struct ipu_ic_csc_params rgbf2yuvl_709 = {
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.coeff = {
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{ 47, 157, 16, },
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{ -26, -87, 112, },
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{ 112, -102, -10, },
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},
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.offset = { 64, 512, 512, },
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.scale = 1,
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.sat = true,
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};
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/* Rec.709 RGB limited-range to YUV full-range */
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static const struct ipu_ic_csc_params rgbl2yuvf_709 = {
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.coeff = {
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{ 63, 213, 22, },
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{ -34, -115, 149, },
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{ 149, -135, -14, },
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},
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.offset = { -75, 512, 512, },
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.scale = 1,
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};
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/* Rec.709 RGB limited-range to YUV limited-range */
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static const struct ipu_ic_csc_params rgbl2yuvl_709 = {
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.coeff = {
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{ 54, 183, 18, },
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{ -30, -101, 131, },
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{ 131, -119, -12, },
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},
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.offset = { 0, 512, 512, },
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.scale = 1,
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.sat = true,
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};
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/*
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* Inverse REC.709 encoding from YUV full range to RGB full range:
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*
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* R = 1. * Y + 0 * (Cb - 128) + 1.5748 * (Cr - 128)
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* G = 1. * Y - .1873 * (Cb - 128) - .4681 * (Cr - 128)
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* B = 1. * Y + 1.8556 * (Cb - 128) + 0 * (Cr - 128)
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*
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* equivalently (factoring out the offsets):
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*
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* R = 1. * Y + 0 * Cb + 1.5748 * Cr - 201.574
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* G = 1. * Y - .1873 * Cb - .4681 * Cr + 83.891
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* B = 1. * Y + 1.8556 * Cb + 0 * Cr - 237.517
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*/
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static const struct ipu_ic_csc_params yuvf2rgbf_709 = {
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.coeff = {
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{ 128, 0, 202 },
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{ 128, -24, -60 },
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{ 128, 238, 0 },
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},
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.offset = { -403, 168, -475 },
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.scale = 2,
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};
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/* Rec.709 YUV full-range to RGB limited-range */
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static const struct ipu_ic_csc_params yuvf2rgbl_709 = {
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.coeff = {
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{ 110, 0, 173, },
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{ 110, -21, -51, },
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{ 110, 204, 0, },
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},
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.offset = { -314, 176, -376, },
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.scale = 2,
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};
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/* Rec.709 YUV limited-range to RGB full-range */
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static const struct ipu_ic_csc_params yuvl2rgbf_709 = {
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.coeff = {
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{ 75, 0, 115, },
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{ 75, -14, -34, },
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{ 75, 135, 0, },
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},
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.offset = { -248, 77, -289, },
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.scale = 3,
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};
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/* Rec.709 YUV limited-range to RGB limited-range */
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static const struct ipu_ic_csc_params yuvl2rgbl_709 = {
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.coeff = {
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{ 128, 0, 197, },
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{ 128, -23, -59, },
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{ 128, 232, 0, },
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},
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.offset = { -394, 164, -464, },
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.scale = 2,
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};
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static const struct ipu_ic_csc_params *rgb2yuv_709[] = {
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&rgbf2yuvf_709,
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&rgbf2yuvl_709,
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&rgbl2yuvf_709,
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&rgbl2yuvl_709,
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};
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static const struct ipu_ic_csc_params *yuv2rgb_709[] = {
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&yuvf2rgbf_709,
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&yuvf2rgbl_709,
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&yuvl2rgbf_709,
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&yuvl2rgbl_709,
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};
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static int calc_csc_coeffs(struct ipu_ic_csc *csc)
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{
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const struct ipu_ic_csc_params **params_tbl;
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int tbl_idx;
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tbl_idx = (QUANT_MAP(csc->in_cs.quant) << 1) |
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QUANT_MAP(csc->out_cs.quant);
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if (csc->in_cs.cs == csc->out_cs.cs) {
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csc->params = (csc->in_cs.cs == IPUV3_COLORSPACE_YUV) ?
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*yuv2yuv[tbl_idx] : *rgb2rgb[tbl_idx];
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return 0;
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}
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/* YUV <-> RGB encoding is required */
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switch (csc->out_cs.enc) {
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case V4L2_YCBCR_ENC_601:
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params_tbl = (csc->in_cs.cs == IPUV3_COLORSPACE_YUV) ?
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yuv2rgb_601 : rgb2yuv_601;
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break;
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case V4L2_YCBCR_ENC_709:
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params_tbl = (csc->in_cs.cs == IPUV3_COLORSPACE_YUV) ?
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yuv2rgb_709 : rgb2yuv_709;
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break;
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default:
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return -ENOTSUPP;
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}
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csc->params = *params_tbl[tbl_idx];
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return 0;
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}
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int __ipu_ic_calc_csc(struct ipu_ic_csc *csc)
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{
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return calc_csc_coeffs(csc);
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}
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EXPORT_SYMBOL_GPL(__ipu_ic_calc_csc);
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int ipu_ic_calc_csc(struct ipu_ic_csc *csc,
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enum v4l2_ycbcr_encoding in_enc,
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enum v4l2_quantization in_quant,
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enum ipu_color_space in_cs,
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enum v4l2_ycbcr_encoding out_enc,
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enum v4l2_quantization out_quant,
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enum ipu_color_space out_cs)
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{
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ipu_ic_fill_colorspace(&csc->in_cs, in_enc, in_quant, in_cs);
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ipu_ic_fill_colorspace(&csc->out_cs, out_enc, out_quant, out_cs);
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return __ipu_ic_calc_csc(csc);
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}
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EXPORT_SYMBOL_GPL(ipu_ic_calc_csc);
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