From: Hans Verkuil <hans.verk...@cisco.com> Add support for the new CTA-861-G Hybrid Log-Gamma transfer function.
Also decode the luminance values in the static metadata block to cd/m^2 values. Signed-off-by: Hans Verkuil <hans.verk...@cisco.com> --- Makefile | 2 +- edid-decode.c | 15 ++++++++++----- 2 files changed, 11 insertions(+), 6 deletions(-) diff --git a/Makefile b/Makefile index 21b811ed..b698c579 100644 --- a/Makefile +++ b/Makefile @@ -2,7 +2,7 @@ bindir ?= /usr/bin mandir ?= /usr/share/man edid-decode: edid-decode.c - $(CC) $(CFLAGS) -g -Wall -o $@ $< + $(CC) $(CFLAGS) -g -Wall -lm -o $@ $< clean: rm -f edid-decode diff --git a/edid-decode.c b/edid-decode.c index 2727fd18..b2b116f3 100644 --- a/edid-decode.c +++ b/edid-decode.c @@ -31,6 +31,7 @@ #include <stdlib.h> #include <time.h> #include <ctype.h> +#include <math.h> #define ARRAY_SIZE(x) (sizeof(x) / sizeof(*(x))) #define min(a, b) ((a) < (b) ? (a) : (b)) @@ -1861,10 +1862,11 @@ static const char *eotf_map[] = { "Traditional gamma - SDR luminance range", "Traditional gamma - HDR luminance range", "SMPTE ST2084", + "Hybrid Log-Gamma", }; static void -cea_hdr_metadata_block(unsigned char *x) +cea_hdr_static_metadata_block(unsigned char *x) { int length = x[0] & 0x1f; int i; @@ -1885,13 +1887,16 @@ cea_hdr_metadata_block(unsigned char *x) } if (length >= 4) - printf(" Desired content max luminance: %d\n", x[4]); + printf(" Desired content max luminance: %d (%.3f cd/m^2)\n", + x[4], 50.0 * pow(2, x[4] / 32.0)); if (length >= 5) - printf(" Desired content max frame-average luminance: %d\n", x[5]); + printf(" Desired content max frame-average luminance: %d (%.3f cd/m^2)\n", + x[5], 50.0 * pow(2, x[5] / 32.0)); if (length >= 6) - printf(" Desired content min luminance: %d\n", x[6]); + printf(" Desired content min luminance: %d (%.3f cd/m^2)\n", + x[6], (50.0 * pow(2, x[4] / 32.0)) * pow(x[6] / 255.0, 2) / 100.0); } static void @@ -1958,7 +1963,7 @@ cea_block(unsigned char *x) break; case 0x06: printf("HDR static metadata data block\n"); - cea_hdr_metadata_block(x); + cea_hdr_static_metadata_block(x); break; case 0x0d: printf("Video format preference data block\n"); -- 2.14.1 _______________________________________________ xorg-devel@lists.x.org: X.Org development Archives: http://lists.x.org/archives/xorg-devel Info: https://lists.x.org/mailman/listinfo/xorg-devel