[media] vivid-tpg: improve colorspace support
Add support for the new AdobeRGB and BT.2020 colorspaces. Also support explicit Y'CbCr and quantization settings. Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
This commit is contained in:
Hans Verkuil
Mauro Carvalho Chehab
parent
3930e906f3
commit
481b97a1f2
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@ -296,127 +296,193 @@ static enum tpg_color tpg_get_textfg_color(struct tpg_data *tpg)
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}
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}
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static u16 color_to_y(struct tpg_data *tpg, int r, int g, int b)
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static inline int rec709_to_linear(int v)
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{
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switch (tpg->colorspace) {
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case V4L2_COLORSPACE_SMPTE170M:
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case V4L2_COLORSPACE_470_SYSTEM_M:
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case V4L2_COLORSPACE_470_SYSTEM_BG:
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return ((16829 * r + 33039 * g + 6416 * b + 16 * 32768) >> 16) + (16 << 4);
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case V4L2_COLORSPACE_SMPTE240M:
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return ((11932 * r + 39455 * g + 4897 * b + 16 * 32768) >> 16) + (16 << 4);
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case V4L2_COLORSPACE_REC709:
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case V4L2_COLORSPACE_SRGB:
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v = clamp(v, 0, 0xff0);
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return tpg_rec709_to_linear[v];
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}
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static inline int linear_to_rec709(int v)
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{
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v = clamp(v, 0, 0xff0);
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return tpg_linear_to_rec709[v];
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}
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static void rgb2ycbcr(const int m[3][3], int r, int g, int b,
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int y_offset, int *y, int *cb, int *cr)
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{
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*y = ((m[0][0] * r + m[0][1] * g + m[0][2] * b) >> 16) + (y_offset << 4);
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*cb = ((m[1][0] * r + m[1][1] * g + m[1][2] * b) >> 16) + (128 << 4);
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*cr = ((m[2][0] * r + m[2][1] * g + m[2][2] * b) >> 16) + (128 << 4);
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}
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static void color_to_ycbcr(struct tpg_data *tpg, int r, int g, int b,
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int *y, int *cb, int *cr)
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{
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#define COEFF(v, r) ((int)(0.5 + (v) * (r) * 256.0))
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static const int bt601[3][3] = {
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{ COEFF(0.299, 219), COEFF(0.587, 219), COEFF(0.114, 219) },
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{ COEFF(-0.169, 224), COEFF(-0.331, 224), COEFF(0.5, 224) },
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{ COEFF(0.5, 224), COEFF(-0.419, 224), COEFF(-0.081, 224) },
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};
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static const int bt601_full[3][3] = {
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{ COEFF(0.299, 255), COEFF(0.587, 255), COEFF(0.114, 255) },
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{ COEFF(-0.169, 255), COEFF(-0.331, 255), COEFF(0.5, 255) },
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{ COEFF(0.5, 255), COEFF(-0.419, 255), COEFF(-0.081, 255) },
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};
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static const int rec709[3][3] = {
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{ COEFF(0.2126, 219), COEFF(0.7152, 219), COEFF(0.0722, 219) },
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{ COEFF(-0.1146, 224), COEFF(-0.3854, 224), COEFF(0.5, 224) },
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{ COEFF(0.5, 224), COEFF(-0.4542, 224), COEFF(-0.0458, 224) },
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};
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static const int rec709_full[3][3] = {
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{ COEFF(0.2126, 255), COEFF(0.7152, 255), COEFF(0.0722, 255) },
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{ COEFF(-0.1146, 255), COEFF(-0.3854, 255), COEFF(0.5, 255) },
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{ COEFF(0.5, 255), COEFF(-0.4542, 255), COEFF(-0.0458, 255) },
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};
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static const int smpte240m[3][3] = {
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{ COEFF(0.212, 219), COEFF(0.701, 219), COEFF(0.087, 219) },
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{ COEFF(-0.116, 224), COEFF(-0.384, 224), COEFF(0.5, 224) },
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{ COEFF(0.5, 224), COEFF(-0.445, 224), COEFF(-0.055, 224) },
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};
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static const int bt2020[3][3] = {
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{ COEFF(0.2726, 219), COEFF(0.6780, 219), COEFF(0.0593, 219) },
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{ COEFF(-0.1396, 224), COEFF(-0.3604, 224), COEFF(0.5, 224) },
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{ COEFF(0.5, 224), COEFF(-0.4629, 224), COEFF(-0.0405, 224) },
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};
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bool full = tpg->real_quantization == V4L2_QUANTIZATION_FULL_RANGE;
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int lin_y, yc;
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switch (tpg->real_ycbcr_enc) {
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case V4L2_YCBCR_ENC_601:
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case V4L2_YCBCR_ENC_XV601:
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case V4L2_YCBCR_ENC_SYCC:
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rgb2ycbcr(full ? bt601_full : bt601, r, g, b, 16, y, cb, cr);
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break;
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case V4L2_YCBCR_ENC_BT2020:
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rgb2ycbcr(bt2020, r, g, b, 16, y, cb, cr);
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break;
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case V4L2_YCBCR_ENC_BT2020_CONST_LUM:
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lin_y = (COEFF(0.2627, 255) * rec709_to_linear(r) +
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COEFF(0.6780, 255) * rec709_to_linear(g) +
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COEFF(0.0593, 255) * rec709_to_linear(b)) >> 16;
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yc = linear_to_rec709(lin_y);
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*y = (yc * 219) / 255 + (16 << 4);
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if (b <= yc)
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*cb = (((b - yc) * COEFF(1.0 / 1.9404, 224)) >> 16) + (128 << 4);
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else
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*cb = (((b - yc) * COEFF(1.0 / 1.5816, 224)) >> 16) + (128 << 4);
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if (r <= yc)
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*cr = (((r - yc) * COEFF(1.0 / 1.7184, 224)) >> 16) + (128 << 4);
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else
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*cr = (((r - yc) * COEFF(1.0 / 0.9936, 224)) >> 16) + (128 << 4);
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break;
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case V4L2_YCBCR_ENC_SMPTE240M:
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rgb2ycbcr(smpte240m, r, g, b, 16, y, cb, cr);
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break;
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case V4L2_YCBCR_ENC_709:
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case V4L2_YCBCR_ENC_XV709:
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default:
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return ((11966 * r + 40254 * g + 4064 * b + 16 * 32768) >> 16) + (16 << 4);
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rgb2ycbcr(full ? rec709_full : rec709, r, g, b, 0, y, cb, cr);
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break;
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}
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}
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static u16 color_to_cb(struct tpg_data *tpg, int r, int g, int b)
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static void ycbcr2rgb(const int m[3][3], int y, int cb, int cr,
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int y_offset, int *r, int *g, int *b)
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{
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switch (tpg->colorspace) {
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case V4L2_COLORSPACE_SMPTE170M:
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case V4L2_COLORSPACE_470_SYSTEM_M:
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case V4L2_COLORSPACE_470_SYSTEM_BG:
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return ((-9714 * r - 19070 * g + 28784 * b + 16 * 32768) >> 16) + (128 << 4);
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case V4L2_COLORSPACE_SMPTE240M:
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return ((-6684 * r - 22100 * g + 28784 * b + 16 * 32768) >> 16) + (128 << 4);
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case V4L2_COLORSPACE_REC709:
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case V4L2_COLORSPACE_SRGB:
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default:
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return ((-6596 * r - 22189 * g + 28784 * b + 16 * 32768) >> 16) + (128 << 4);
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}
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}
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static u16 color_to_cr(struct tpg_data *tpg, int r, int g, int b)
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{
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switch (tpg->colorspace) {
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case V4L2_COLORSPACE_SMPTE170M:
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case V4L2_COLORSPACE_470_SYSTEM_M:
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case V4L2_COLORSPACE_470_SYSTEM_BG:
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return ((28784 * r - 24103 * g - 4681 * b + 16 * 32768) >> 16) + (128 << 4);
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case V4L2_COLORSPACE_SMPTE240M:
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return ((28784 * r - 25606 * g - 3178 * b + 16 * 32768) >> 16) + (128 << 4);
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case V4L2_COLORSPACE_REC709:
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case V4L2_COLORSPACE_SRGB:
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default:
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return ((28784 * r - 26145 * g - 2639 * b + 16 * 32768) >> 16) + (128 << 4);
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}
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}
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static u16 ycbcr_to_r(struct tpg_data *tpg, int y, int cb, int cr)
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{
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int r;
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y -= 16 << 4;
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y -= y_offset << 4;
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cb -= 128 << 4;
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cr -= 128 << 4;
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switch (tpg->colorspace) {
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case V4L2_COLORSPACE_SMPTE170M:
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case V4L2_COLORSPACE_470_SYSTEM_M:
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case V4L2_COLORSPACE_470_SYSTEM_BG:
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r = 4769 * y + 6537 * cr;
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break;
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case V4L2_COLORSPACE_SMPTE240M:
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r = 4769 * y + 7376 * cr;
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break;
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case V4L2_COLORSPACE_REC709:
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case V4L2_COLORSPACE_SRGB:
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default:
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r = 4769 * y + 7343 * cr;
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break;
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}
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return clamp(r >> 12, 0, 0xff0);
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*r = m[0][0] * y + m[0][1] * cb + m[0][2] * cr;
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*g = m[1][0] * y + m[1][1] * cb + m[1][2] * cr;
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*b = m[2][0] * y + m[2][1] * cb + m[2][2] * cr;
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*r = clamp(*r >> 12, 0, 0xff0);
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*g = clamp(*g >> 12, 0, 0xff0);
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*b = clamp(*b >> 12, 0, 0xff0);
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}
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static u16 ycbcr_to_g(struct tpg_data *tpg, int y, int cb, int cr)
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static void ycbcr_to_color(struct tpg_data *tpg, int y, int cb, int cr,
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int *r, int *g, int *b)
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{
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int g;
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#undef COEFF
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#define COEFF(v, r) ((int)(0.5 + (v) * ((255.0 * 255.0 * 16.0) / (r))))
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static const int bt601[3][3] = {
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{ COEFF(1, 219), COEFF(0, 224), COEFF(1.4020, 224) },
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{ COEFF(1, 219), COEFF(-0.3441, 224), COEFF(-0.7141, 224) },
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{ COEFF(1, 219), COEFF(1.7720, 224), COEFF(0, 224) },
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};
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static const int bt601_full[3][3] = {
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{ COEFF(1, 255), COEFF(0, 255), COEFF(1.4020, 255) },
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{ COEFF(1, 255), COEFF(-0.3441, 255), COEFF(-0.7141, 255) },
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{ COEFF(1, 255), COEFF(1.7720, 255), COEFF(0, 255) },
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};
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static const int rec709[3][3] = {
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{ COEFF(1, 219), COEFF(0, 224), COEFF(1.5748, 224) },
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{ COEFF(1, 219), COEFF(-0.1873, 224), COEFF(-0.4681, 224) },
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{ COEFF(1, 219), COEFF(1.8556, 224), COEFF(0, 224) },
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};
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static const int rec709_full[3][3] = {
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{ COEFF(1, 255), COEFF(0, 255), COEFF(1.5748, 255) },
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{ COEFF(1, 255), COEFF(-0.1873, 255), COEFF(-0.4681, 255) },
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{ COEFF(1, 255), COEFF(1.8556, 255), COEFF(0, 255) },
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};
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static const int smpte240m[3][3] = {
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{ COEFF(1, 219), COEFF(0, 224), COEFF(1.5756, 224) },
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{ COEFF(1, 219), COEFF(-0.2253, 224), COEFF(-0.4767, 224) },
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{ COEFF(1, 219), COEFF(1.8270, 224), COEFF(0, 224) },
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};
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static const int bt2020[3][3] = {
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{ COEFF(1, 219), COEFF(0, 224), COEFF(1.4746, 224) },
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{ COEFF(1, 219), COEFF(-0.1646, 224), COEFF(-0.5714, 224) },
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{ COEFF(1, 219), COEFF(1.8814, 224), COEFF(0, 224) },
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};
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bool full = tpg->real_quantization == V4L2_QUANTIZATION_FULL_RANGE;
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int lin_r, lin_g, lin_b, lin_y;
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y -= 16 << 4;
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cb -= 128 << 4;
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cr -= 128 << 4;
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switch (tpg->colorspace) {
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case V4L2_COLORSPACE_SMPTE170M:
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case V4L2_COLORSPACE_470_SYSTEM_M:
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case V4L2_COLORSPACE_470_SYSTEM_BG:
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g = 4769 * y - 1605 * cb - 3330 * cr;
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switch (tpg->real_ycbcr_enc) {
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case V4L2_YCBCR_ENC_601:
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case V4L2_YCBCR_ENC_XV601:
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case V4L2_YCBCR_ENC_SYCC:
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ycbcr2rgb(full ? bt601_full : bt601, y, cb, cr, 16, r, g, b);
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break;
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case V4L2_COLORSPACE_SMPTE240M:
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g = 4769 * y - 1055 * cb - 2341 * cr;
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case V4L2_YCBCR_ENC_BT2020:
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ycbcr2rgb(bt2020, y, cb, cr, 16, r, g, b);
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break;
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case V4L2_COLORSPACE_REC709:
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case V4L2_COLORSPACE_SRGB:
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case V4L2_YCBCR_ENC_BT2020_CONST_LUM:
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y -= 16 << 4;
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cb -= 128 << 4;
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cr -= 128 << 4;
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if (cb <= 0)
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*b = COEFF(1.0, 219) * y + COEFF(1.9404, 224) * cb;
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else
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*b = COEFF(1.0, 219) * y + COEFF(1.5816, 224) * cb;
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*b = *b >> 12;
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if (cr <= 0)
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*r = COEFF(1.0, 219) * y + COEFF(1.7184, 224) * cr;
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else
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*r = COEFF(1.0, 219) * y + COEFF(0.9936, 224) * cr;
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*r = *r >> 12;
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lin_r = rec709_to_linear(*r);
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lin_b = rec709_to_linear(*b);
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lin_y = rec709_to_linear((y * 255) / 219);
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lin_g = COEFF(1.0 / 0.6780, 255) * lin_y -
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COEFF(0.2627 / 0.6780, 255) * lin_r -
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COEFF(0.0593 / 0.6780, 255) * lin_b;
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*g = linear_to_rec709(lin_g >> 12);
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break;
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case V4L2_YCBCR_ENC_SMPTE240M:
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ycbcr2rgb(smpte240m, y, cb, cr, 16, r, g, b);
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break;
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case V4L2_YCBCR_ENC_709:
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case V4L2_YCBCR_ENC_XV709:
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default:
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g = 4769 * y - 873 * cb - 2183 * cr;
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ycbcr2rgb(full ? rec709_full : rec709, y, cb, cr, 16, r, g, b);
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break;
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}
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return clamp(g >> 12, 0, 0xff0);
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}
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static u16 ycbcr_to_b(struct tpg_data *tpg, int y, int cb, int cr)
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{
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int b;
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y -= 16 << 4;
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cb -= 128 << 4;
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cr -= 128 << 4;
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switch (tpg->colorspace) {
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case V4L2_COLORSPACE_SMPTE170M:
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case V4L2_COLORSPACE_470_SYSTEM_M:
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case V4L2_COLORSPACE_470_SYSTEM_BG:
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b = 4769 * y + 7343 * cb;
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break;
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case V4L2_COLORSPACE_SMPTE240M:
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b = 4769 * y + 8552 * cb;
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break;
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case V4L2_COLORSPACE_REC709:
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case V4L2_COLORSPACE_SRGB:
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default:
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b = 4769 * y + 8652 * cb;
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break;
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}
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return clamp(b >> 12, 0, 0xff0);
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}
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/* precalculate color bar values to speed up rendering */
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@ -456,18 +522,17 @@ static void precalculate_color(struct tpg_data *tpg, int k)
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g <<= 4;
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b <<= 4;
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}
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if (tpg->qual == TPG_QUAL_GRAY)
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r = g = b = color_to_y(tpg, r, g, b);
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if (tpg->qual == TPG_QUAL_GRAY) {
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/* Rec. 709 Luma function */
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/* (0.2126, 0.7152, 0.0722) * (255 * 256) */
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r = g = b = ((13879 * r + 46688 * g + 4713 * b) >> 16) + (16 << 4);
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}
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/*
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* The assumption is that the RGB output is always full range,
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* so only if the rgb_range overrides the 'real' rgb range do
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* we need to convert the RGB values.
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*
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* Currently there is no way of signalling to userspace if you
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* are actually giving it limited range RGB (or full range
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* YUV for that matter).
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*
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* Remember that r, g and b are still in the 0 - 0xff0 range.
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*/
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if (tpg->real_rgb_range == V4L2_DV_RGB_RANGE_LIMITED &&
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@ -497,12 +562,12 @@ static void precalculate_color(struct tpg_data *tpg, int k)
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if (tpg->brightness != 128 || tpg->contrast != 128 ||
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tpg->saturation != 128 || tpg->hue) {
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/* Implement these operations */
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int y, cb, cr;
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int tmp_cb, tmp_cr;
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/* First convert to YCbCr */
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int y = color_to_y(tpg, r, g, b); /* Luma */
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int cb = color_to_cb(tpg, r, g, b); /* Cb */
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int cr = color_to_cr(tpg, r, g, b); /* Cr */
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int tmp_cb, tmp_cr;
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color_to_ycbcr(tpg, r, g, b, &y, &cb, &cr);
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y = (16 << 4) + ((y - (16 << 4)) * tpg->contrast) / 128;
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y += (tpg->brightness << 4) - (128 << 4);
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@ -520,21 +585,29 @@ static void precalculate_color(struct tpg_data *tpg, int k)
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tpg->colors[k][2] = clamp(cr >> 4, 1, 254);
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return;
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}
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r = ycbcr_to_r(tpg, y, cb, cr);
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g = ycbcr_to_g(tpg, y, cb, cr);
|
||||
b = ycbcr_to_b(tpg, y, cb, cr);
|
||||
ycbcr_to_color(tpg, y, cb, cr, &r, &g, &b);
|
||||
}
|
||||
|
||||
if (tpg->is_yuv) {
|
||||
/* Convert to YCbCr */
|
||||
u16 y = color_to_y(tpg, r, g, b); /* Luma */
|
||||
u16 cb = color_to_cb(tpg, r, g, b); /* Cb */
|
||||
u16 cr = color_to_cr(tpg, r, g, b); /* Cr */
|
||||
int y, cb, cr;
|
||||
|
||||
color_to_ycbcr(tpg, r, g, b, &y, &cb, &cr);
|
||||
|
||||
if (tpg->real_quantization == V4L2_QUANTIZATION_LIM_RANGE) {
|
||||
y = clamp(y, 16 << 4, 235 << 4);
|
||||
cb = clamp(cb, 16 << 4, 240 << 4);
|
||||
cr = clamp(cr, 16 << 4, 240 << 4);
|
||||
}
|
||||
tpg->colors[k][0] = clamp(y >> 4, 1, 254);
|
||||
tpg->colors[k][1] = clamp(cb >> 4, 1, 254);
|
||||
tpg->colors[k][2] = clamp(cr >> 4, 1, 254);
|
||||
} else {
|
||||
if (tpg->real_quantization == V4L2_QUANTIZATION_LIM_RANGE) {
|
||||
r = (r * 219) / 255 + (16 << 4);
|
||||
g = (g * 219) / 255 + (16 << 4);
|
||||
b = (b * 219) / 255 + (16 << 4);
|
||||
}
|
||||
switch (tpg->fourcc) {
|
||||
case V4L2_PIX_FMT_RGB565:
|
||||
case V4L2_PIX_FMT_RGB565X:
|
||||
|
|
@ -1152,6 +1225,46 @@ static void tpg_recalc(struct tpg_data *tpg)
|
|||
if (tpg->recalc_colors) {
|
||||
tpg->recalc_colors = false;
|
||||
tpg->recalc_lines = true;
|
||||
tpg->real_ycbcr_enc = tpg->ycbcr_enc;
|
||||
tpg->real_quantization = tpg->quantization;
|
||||
if (tpg->ycbcr_enc == V4L2_YCBCR_ENC_DEFAULT) {
|
||||
switch (tpg->colorspace) {
|
||||
case V4L2_COLORSPACE_REC709:
|
||||
tpg->real_ycbcr_enc = V4L2_YCBCR_ENC_709;
|
||||
break;
|
||||
case V4L2_COLORSPACE_SRGB:
|
||||
tpg->real_ycbcr_enc = V4L2_YCBCR_ENC_SYCC;
|
||||
break;
|
||||
case V4L2_COLORSPACE_BT2020:
|
||||
tpg->real_ycbcr_enc = V4L2_YCBCR_ENC_BT2020;
|
||||
break;
|
||||
case V4L2_COLORSPACE_SMPTE240M:
|
||||
tpg->real_ycbcr_enc = V4L2_YCBCR_ENC_SMPTE240M;
|
||||
break;
|
||||
case V4L2_COLORSPACE_SMPTE170M:
|
||||
case V4L2_COLORSPACE_470_SYSTEM_M:
|
||||
case V4L2_COLORSPACE_470_SYSTEM_BG:
|
||||
case V4L2_COLORSPACE_ADOBERGB:
|
||||
default:
|
||||
tpg->real_ycbcr_enc = V4L2_YCBCR_ENC_601;
|
||||
break;
|
||||
}
|
||||
}
|
||||
if (tpg->quantization == V4L2_QUANTIZATION_DEFAULT) {
|
||||
tpg->real_quantization = V4L2_QUANTIZATION_FULL_RANGE;
|
||||
if (tpg->is_yuv) {
|
||||
switch (tpg->real_ycbcr_enc) {
|
||||
case V4L2_YCBCR_ENC_SYCC:
|
||||
case V4L2_YCBCR_ENC_XV601:
|
||||
case V4L2_YCBCR_ENC_XV709:
|
||||
break;
|
||||
default:
|
||||
tpg->real_quantization =
|
||||
V4L2_QUANTIZATION_LIM_RANGE;
|
||||
break;
|
||||
}
|
||||
}
|
||||
}
|
||||
tpg_precalculate_colors(tpg);
|
||||
}
|
||||
if (tpg->recalc_square_border) {
|
||||
|
|
|
|||
|
|
@ -119,6 +119,18 @@ struct tpg_data {
|
|||
u32 fourcc;
|
||||
bool is_yuv;
|
||||
u32 colorspace;
|
||||
u32 ycbcr_enc;
|
||||
/*
|
||||
* Stores the actual Y'CbCr encoding, i.e. will never be
|
||||
* V4L2_YCBCR_ENC_DEFAULT.
|
||||
*/
|
||||
u32 real_ycbcr_enc;
|
||||
u32 quantization;
|
||||
/*
|
||||
* Stores the actual quantization, i.e. will never be
|
||||
* V4L2_QUANTIZATION_DEFAULT.
|
||||
*/
|
||||
u32 real_quantization;
|
||||
enum tpg_video_aspect vid_aspect;
|
||||
enum tpg_pixel_aspect pix_aspect;
|
||||
unsigned rgb_range;
|
||||
|
|
@ -286,6 +298,32 @@ static inline u32 tpg_g_colorspace(const struct tpg_data *tpg)
|
|||
return tpg->colorspace;
|
||||
}
|
||||
|
||||
static inline void tpg_s_ycbcr_enc(struct tpg_data *tpg, u32 ycbcr_enc)
|
||||
{
|
||||
if (tpg->ycbcr_enc == ycbcr_enc)
|
||||
return;
|
||||
tpg->ycbcr_enc = ycbcr_enc;
|
||||
tpg->recalc_colors = true;
|
||||
}
|
||||
|
||||
static inline u32 tpg_g_ycbcr_enc(const struct tpg_data *tpg)
|
||||
{
|
||||
return tpg->ycbcr_enc;
|
||||
}
|
||||
|
||||
static inline void tpg_s_quantization(struct tpg_data *tpg, u32 quantization)
|
||||
{
|
||||
if (tpg->quantization == quantization)
|
||||
return;
|
||||
tpg->quantization = quantization;
|
||||
tpg->recalc_colors = true;
|
||||
}
|
||||
|
||||
static inline u32 tpg_g_quantization(const struct tpg_data *tpg)
|
||||
{
|
||||
return tpg->quantization;
|
||||
}
|
||||
|
||||
static inline unsigned tpg_g_planes(const struct tpg_data *tpg)
|
||||
{
|
||||
return tpg->planes;
|
||||
|
|
|
|||
Loading…
Reference in New Issue