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authorMauro Carvalho Chehab <mchehab@osg.samsung.com>2014-10-09 17:00:54 (GMT)
committerMauro Carvalho Chehab <mchehab@osg.samsung.com>2014-10-09 17:00:54 (GMT)
commita66d05d504a24894a8fdf11e4569752f313e5764 (patch)
tree2bb40c1f6c301b231d7aeaad08c190aa5a82ba1f /drivers/media/platform/vivid/vivid-tpg-colors.c
parentbfe01a5ba2490f299e1d2d5508cbbbadd897bbe9 (diff)
parent5563caaf8b8cd22e35997d5d74cb3609df86b223 (diff)
Merge branch 'patchwork' into v4l_for_linusmedia/v3.18-rc1
* patchwork: (544 commits) [media] ir-hix5hd2: fix build on c6x arch [media] pt3: fix DTV FE I2C driver load error paths Revert "[media] media: em28xx - remove reset_resume interface" [media] exynos4-is: fix some warnings when compiling on arm64 [media] usb drivers: use %zu instead of %zd [media] pci drivers: use %zu instead of %zd [media] dvb-frontends: use %zu instead of %zd [media] s5p-mfc: Fix several printk warnings [media] s5p_mfc_opr: Fix warnings [media] ti-vpe: Fix typecast [media] s3c-camif: fix dma_addr_t printks [media] s5p_mfc_opr_v6: get rid of warnings when compiled with 64 bits [media] s5p_mfc_opr_v5: Fix lots of warnings on x86_64 [media] em28xx: Fix identation [media] drxd: remove a dead code [media] saa7146: remove return after BUG() [media] cx88: remove return after BUG() [media] cx88: fix cards table CodingStyle [media] radio-sf16fmr2: declare some structs as static [media] radio-sf16fmi: declare pnp_attached as static ... Conflicts: Documentation/DocBook/media/v4l/compat.xml
Diffstat (limited to 'drivers/media/platform/vivid/vivid-tpg-colors.c')
-rw-r--r--drivers/media/platform/vivid/vivid-tpg-colors.c310
1 files changed, 310 insertions, 0 deletions
diff --git a/drivers/media/platform/vivid/vivid-tpg-colors.c b/drivers/media/platform/vivid/vivid-tpg-colors.c
new file mode 100644
index 0000000..2adddc0
--- /dev/null
+++ b/drivers/media/platform/vivid/vivid-tpg-colors.c
@@ -0,0 +1,310 @@
+/*
+ * vivid-color.c - A table that converts colors to various colorspaces
+ *
+ * The test pattern generator uses the tpg_colors for its test patterns.
+ * For testing colorspaces the first 8 colors of that table need to be
+ * converted to their equivalent in the target colorspace.
+ *
+ * The tpg_csc_colors[] table is the result of that conversion and since
+ * it is precalculated the colorspace conversion is just a simple table
+ * lookup.
+ *
+ * This source also contains the code used to generate the tpg_csc_colors
+ * table. Run the following command to compile it:
+ *
+ * gcc vivid-colors.c -DCOMPILE_APP -o gen-colors -lm
+ *
+ * and run the utility.
+ *
+ * Note that the converted colors are in the range 0x000-0xff0 (so times 16)
+ * in order to preserve precision.
+ *
+ * Copyright 2014 Cisco Systems, Inc. and/or its affiliates. All rights reserved.
+ *
+ * This program is free software; you may redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#include <linux/videodev2.h>
+
+#include "vivid-tpg-colors.h"
+
+/* sRGB colors with range [0-255] */
+const struct color tpg_colors[TPG_COLOR_MAX] = {
+ /*
+ * Colors to test colorspace conversion: converting these colors
+ * to other colorspaces will never lead to out-of-gamut colors.
+ */
+ { 191, 191, 191 }, /* TPG_COLOR_CSC_WHITE */
+ { 191, 191, 50 }, /* TPG_COLOR_CSC_YELLOW */
+ { 50, 191, 191 }, /* TPG_COLOR_CSC_CYAN */
+ { 50, 191, 50 }, /* TPG_COLOR_CSC_GREEN */
+ { 191, 50, 191 }, /* TPG_COLOR_CSC_MAGENTA */
+ { 191, 50, 50 }, /* TPG_COLOR_CSC_RED */
+ { 50, 50, 191 }, /* TPG_COLOR_CSC_BLUE */
+ { 50, 50, 50 }, /* TPG_COLOR_CSC_BLACK */
+
+ /* 75% colors */
+ { 191, 191, 0 }, /* TPG_COLOR_75_YELLOW */
+ { 0, 191, 191 }, /* TPG_COLOR_75_CYAN */
+ { 0, 191, 0 }, /* TPG_COLOR_75_GREEN */
+ { 191, 0, 191 }, /* TPG_COLOR_75_MAGENTA */
+ { 191, 0, 0 }, /* TPG_COLOR_75_RED */
+ { 0, 0, 191 }, /* TPG_COLOR_75_BLUE */
+
+ /* 100% colors */
+ { 255, 255, 255 }, /* TPG_COLOR_100_WHITE */
+ { 255, 255, 0 }, /* TPG_COLOR_100_YELLOW */
+ { 0, 255, 255 }, /* TPG_COLOR_100_CYAN */
+ { 0, 255, 0 }, /* TPG_COLOR_100_GREEN */
+ { 255, 0, 255 }, /* TPG_COLOR_100_MAGENTA */
+ { 255, 0, 0 }, /* TPG_COLOR_100_RED */
+ { 0, 0, 255 }, /* TPG_COLOR_100_BLUE */
+ { 0, 0, 0 }, /* TPG_COLOR_100_BLACK */
+
+ { 0, 0, 0 }, /* TPG_COLOR_RANDOM placeholder */
+};
+
+#ifndef COMPILE_APP
+
+/* Generated table */
+const struct color16 tpg_csc_colors[V4L2_COLORSPACE_SRGB + 1][TPG_COLOR_CSC_BLACK + 1] = {
+ [V4L2_COLORSPACE_SMPTE170M][0] = { 2953, 2939, 2939 },
+ [V4L2_COLORSPACE_SMPTE170M][1] = { 2954, 2963, 585 },
+ [V4L2_COLORSPACE_SMPTE170M][2] = { 84, 2967, 2937 },
+ [V4L2_COLORSPACE_SMPTE170M][3] = { 93, 2990, 575 },
+ [V4L2_COLORSPACE_SMPTE170M][4] = { 3030, 259, 2933 },
+ [V4L2_COLORSPACE_SMPTE170M][5] = { 3031, 406, 557 },
+ [V4L2_COLORSPACE_SMPTE170M][6] = { 544, 428, 2931 },
+ [V4L2_COLORSPACE_SMPTE170M][7] = { 551, 547, 547 },
+ [V4L2_COLORSPACE_SMPTE240M][0] = { 2926, 2926, 2926 },
+ [V4L2_COLORSPACE_SMPTE240M][1] = { 2926, 2926, 857 },
+ [V4L2_COLORSPACE_SMPTE240M][2] = { 1594, 2901, 2901 },
+ [V4L2_COLORSPACE_SMPTE240M][3] = { 1594, 2901, 774 },
+ [V4L2_COLORSPACE_SMPTE240M][4] = { 2484, 618, 2858 },
+ [V4L2_COLORSPACE_SMPTE240M][5] = { 2484, 618, 617 },
+ [V4L2_COLORSPACE_SMPTE240M][6] = { 507, 507, 2832 },
+ [V4L2_COLORSPACE_SMPTE240M][7] = { 507, 507, 507 },
+ [V4L2_COLORSPACE_REC709][0] = { 2939, 2939, 2939 },
+ [V4L2_COLORSPACE_REC709][1] = { 2939, 2939, 547 },
+ [V4L2_COLORSPACE_REC709][2] = { 547, 2939, 2939 },
+ [V4L2_COLORSPACE_REC709][3] = { 547, 2939, 547 },
+ [V4L2_COLORSPACE_REC709][4] = { 2939, 547, 2939 },
+ [V4L2_COLORSPACE_REC709][5] = { 2939, 547, 547 },
+ [V4L2_COLORSPACE_REC709][6] = { 547, 547, 2939 },
+ [V4L2_COLORSPACE_REC709][7] = { 547, 547, 547 },
+ [V4L2_COLORSPACE_470_SYSTEM_M][0] = { 2894, 2988, 2808 },
+ [V4L2_COLORSPACE_470_SYSTEM_M][1] = { 2847, 3070, 843 },
+ [V4L2_COLORSPACE_470_SYSTEM_M][2] = { 1656, 2962, 2783 },
+ [V4L2_COLORSPACE_470_SYSTEM_M][3] = { 1572, 3045, 763 },
+ [V4L2_COLORSPACE_470_SYSTEM_M][4] = { 2477, 229, 2743 },
+ [V4L2_COLORSPACE_470_SYSTEM_M][5] = { 2422, 672, 614 },
+ [V4L2_COLORSPACE_470_SYSTEM_M][6] = { 725, 63, 2718 },
+ [V4L2_COLORSPACE_470_SYSTEM_M][7] = { 534, 561, 509 },
+ [V4L2_COLORSPACE_470_SYSTEM_BG][0] = { 2939, 2939, 2939 },
+ [V4L2_COLORSPACE_470_SYSTEM_BG][1] = { 2939, 2939, 621 },
+ [V4L2_COLORSPACE_470_SYSTEM_BG][2] = { 786, 2939, 2939 },
+ [V4L2_COLORSPACE_470_SYSTEM_BG][3] = { 786, 2939, 621 },
+ [V4L2_COLORSPACE_470_SYSTEM_BG][4] = { 2879, 547, 2923 },
+ [V4L2_COLORSPACE_470_SYSTEM_BG][5] = { 2879, 547, 547 },
+ [V4L2_COLORSPACE_470_SYSTEM_BG][6] = { 547, 547, 2923 },
+ [V4L2_COLORSPACE_470_SYSTEM_BG][7] = { 547, 547, 547 },
+ [V4L2_COLORSPACE_SRGB][0] = { 3056, 3056, 3056 },
+ [V4L2_COLORSPACE_SRGB][1] = { 3056, 3056, 800 },
+ [V4L2_COLORSPACE_SRGB][2] = { 800, 3056, 3056 },
+ [V4L2_COLORSPACE_SRGB][3] = { 800, 3056, 800 },
+ [V4L2_COLORSPACE_SRGB][4] = { 3056, 800, 3056 },
+ [V4L2_COLORSPACE_SRGB][5] = { 3056, 800, 800 },
+ [V4L2_COLORSPACE_SRGB][6] = { 800, 800, 3056 },
+ [V4L2_COLORSPACE_SRGB][7] = { 800, 800, 800 },
+};
+
+#else
+
+/* This code generates the table above */
+
+#include <math.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+static const double rec709_to_ntsc1953[3][3] = {
+ { 0.6698, 0.2678, 0.0323 },
+ { 0.0185, 1.0742, -0.0603 },
+ { 0.0162, 0.0432, 0.8551 }
+};
+
+static const double rec709_to_ebu[3][3] = {
+ { 0.9578, 0.0422, 0 },
+ { 0 , 1 , 0 },
+ { 0 , 0.0118, 0.9882 }
+};
+
+static const double rec709_to_170m[3][3] = {
+ { 1.0654, -0.0554, -0.0010 },
+ { -0.0196, 1.0364, -0.0167 },
+ { 0.0016, 0.0044, 0.9940 }
+};
+
+static const double rec709_to_240m[3][3] = {
+ { 0.7151, 0.2849, 0 },
+ { 0.0179, 0.9821, 0 },
+ { 0.0177, 0.0472, 0.9350 }
+};
+
+
+static void mult_matrix(double *r, double *g, double *b, const double m[3][3])
+{
+ double ir, ig, ib;
+
+ ir = m[0][0] * (*r) + m[0][1] * (*g) + m[0][2] * (*b);
+ ig = m[1][0] * (*r) + m[1][1] * (*g) + m[1][2] * (*b);
+ ib = m[2][0] * (*r) + m[2][1] * (*g) + m[2][2] * (*b);
+ *r = ir;
+ *g = ig;
+ *b = ib;
+}
+
+static double transfer_srgb_to_rgb(double v)
+{
+ return (v <= 0.03928) ? v / 12.92 : pow((v + 0.055) / 1.055, 2.4);
+}
+
+static double transfer_rgb_to_smpte240m(double v)
+{
+ return (v <= 0.0228) ? v * 4.0 : 1.1115 * pow(v, 0.45) - 0.1115;
+}
+
+static double transfer_rgb_to_rec709(double v)
+{
+ return (v < 0.018) ? v * 4.5 : 1.099 * pow(v, 0.45) - 0.099;
+}
+
+static double transfer_srgb_to_rec709(double v)
+{
+ return transfer_rgb_to_rec709(transfer_srgb_to_rgb(v));
+}
+
+static void csc(enum v4l2_colorspace colorspace, double *r, double *g, double *b)
+{
+ /* Convert the primaries of Rec. 709 Linear RGB */
+ switch (colorspace) {
+ case V4L2_COLORSPACE_SMPTE240M:
+ *r = transfer_srgb_to_rgb(*r);
+ *g = transfer_srgb_to_rgb(*g);
+ *b = transfer_srgb_to_rgb(*b);
+ mult_matrix(r, g, b, rec709_to_240m);
+ break;
+ case V4L2_COLORSPACE_SMPTE170M:
+ *r = transfer_srgb_to_rgb(*r);
+ *g = transfer_srgb_to_rgb(*g);
+ *b = transfer_srgb_to_rgb(*b);
+ mult_matrix(r, g, b, rec709_to_170m);
+ break;
+ case V4L2_COLORSPACE_470_SYSTEM_BG:
+ *r = transfer_srgb_to_rgb(*r);
+ *g = transfer_srgb_to_rgb(*g);
+ *b = transfer_srgb_to_rgb(*b);
+ mult_matrix(r, g, b, rec709_to_ebu);
+ break;
+ case V4L2_COLORSPACE_470_SYSTEM_M:
+ *r = transfer_srgb_to_rgb(*r);
+ *g = transfer_srgb_to_rgb(*g);
+ *b = transfer_srgb_to_rgb(*b);
+ mult_matrix(r, g, b, rec709_to_ntsc1953);
+ break;
+ case V4L2_COLORSPACE_SRGB:
+ case V4L2_COLORSPACE_REC709:
+ default:
+ break;
+ }
+
+ *r = ((*r) < 0) ? 0 : (((*r) > 1) ? 1 : (*r));
+ *g = ((*g) < 0) ? 0 : (((*g) > 1) ? 1 : (*g));
+ *b = ((*b) < 0) ? 0 : (((*b) > 1) ? 1 : (*b));
+
+ /* Encode to gamma corrected colorspace */
+ switch (colorspace) {
+ case V4L2_COLORSPACE_SMPTE240M:
+ *r = transfer_rgb_to_smpte240m(*r);
+ *g = transfer_rgb_to_smpte240m(*g);
+ *b = transfer_rgb_to_smpte240m(*b);
+ break;
+ case V4L2_COLORSPACE_SMPTE170M:
+ case V4L2_COLORSPACE_470_SYSTEM_M:
+ case V4L2_COLORSPACE_470_SYSTEM_BG:
+ *r = transfer_rgb_to_rec709(*r);
+ *g = transfer_rgb_to_rec709(*g);
+ *b = transfer_rgb_to_rec709(*b);
+ break;
+ case V4L2_COLORSPACE_SRGB:
+ break;
+ case V4L2_COLORSPACE_REC709:
+ default:
+ *r = transfer_srgb_to_rec709(*r);
+ *g = transfer_srgb_to_rec709(*g);
+ *b = transfer_srgb_to_rec709(*b);
+ break;
+ }
+}
+
+int main(int argc, char **argv)
+{
+ static const unsigned colorspaces[] = {
+ 0,
+ V4L2_COLORSPACE_SMPTE170M,
+ V4L2_COLORSPACE_SMPTE240M,
+ V4L2_COLORSPACE_REC709,
+ 0,
+ V4L2_COLORSPACE_470_SYSTEM_M,
+ V4L2_COLORSPACE_470_SYSTEM_BG,
+ 0,
+ V4L2_COLORSPACE_SRGB,
+ };
+ static const char * const colorspace_names[] = {
+ "",
+ "V4L2_COLORSPACE_SMPTE170M",
+ "V4L2_COLORSPACE_SMPTE240M",
+ "V4L2_COLORSPACE_REC709",
+ "",
+ "V4L2_COLORSPACE_470_SYSTEM_M",
+ "V4L2_COLORSPACE_470_SYSTEM_BG",
+ "",
+ "V4L2_COLORSPACE_SRGB",
+ };
+ int i;
+ int c;
+
+ printf("/* Generated table */\n");
+ printf("const struct color16 tpg_csc_colors[V4L2_COLORSPACE_SRGB + 1][TPG_COLOR_CSC_BLACK + 1] = {\n");
+ for (c = 0; c <= V4L2_COLORSPACE_SRGB; c++) {
+ for (i = 0; i <= TPG_COLOR_CSC_BLACK; i++) {
+ double r, g, b;
+
+ if (colorspaces[c] == 0)
+ continue;
+
+ r = tpg_colors[i].r / 255.0;
+ g = tpg_colors[i].g / 255.0;
+ b = tpg_colors[i].b / 255.0;
+
+ csc(c, &r, &g, &b);
+
+ printf("\t[%s][%d] = { %d, %d, %d },\n", colorspace_names[c], i,
+ (int)(r * 4080), (int)(g * 4080), (int)(b * 4080));
+ }
+ }
+ printf("};\n\n");
+ return 0;
+}
+
+#endif

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