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gpu: ipu-v3: ipu-ic-csc: Add support for limited range encoding
Add support for encodings to or from limited range quantization. Signed-off-by: Steve Longerbeam <slongerbeam@gmail.com> Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
This commit is contained in:
Steve Longerbeam
Philipp Zabel
parent
f208b26e61
commit
e3e4820d05
@ -10,6 +10,10 @@
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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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@ -21,12 +25,87 @@ static const struct ipu_ic_csc_params identity = {
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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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@ -46,6 +125,41 @@ static const struct ipu_ic_csc_params rgbf2yuvf_601 = {
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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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@ -69,39 +183,77 @@ static const struct ipu_ic_csc_params yuvf2rgbf_601 = {
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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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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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if (csc->out_cs.enc != V4L2_YCBCR_ENC_601)
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return -ENOTSUPP;
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if ((csc->in_cs.cs == IPUV3_COLORSPACE_YUV &&
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csc->in_cs.quant != V4L2_QUANTIZATION_FULL_RANGE) ||
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(csc->out_cs.cs == IPUV3_COLORSPACE_YUV &&
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csc->out_cs.quant != V4L2_QUANTIZATION_FULL_RANGE))
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return -ENOTSUPP;
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if ((csc->in_cs.cs == IPUV3_COLORSPACE_RGB &&
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csc->in_cs.quant != V4L2_QUANTIZATION_FULL_RANGE) ||
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(csc->out_cs.cs == IPUV3_COLORSPACE_RGB &&
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csc->out_cs.quant != V4L2_QUANTIZATION_FULL_RANGE))
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return -ENOTSUPP;
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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[0] : *rgb2rgb[0];
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*yuv2yuv[tbl_idx] : *rgb2rgb[tbl_idx];
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return 0;
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}
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csc->params = (csc->in_cs.cs == IPUV3_COLORSPACE_YUV) ?
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*yuv2rgb_601[0] : *rgb2yuv_601[0];
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/* YUV <-> RGB encoding is required */
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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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csc->params = *params_tbl[tbl_idx];
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return 0;
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}
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