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edid-decode.c
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/*
* Copyright 2006-2012 Red Hat, Inc.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* on the rights to use, copy, modify, merge, publish, distribute, sub
* license, and/or sell copies of the Software, and to permit persons to whom
* the Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice (including the next
* paragraph) shall be included in all copies or substantial portions of the
* Software.
*
* 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 NON-INFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS 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.
*/
/* Author: Adam Jackson <[email protected]> */
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <stdio.h>
#include <stdint.h>
#include <unistd.h>
#include <string.h>
#include <stdlib.h>
#include <time.h>
#include <ctype.h>
#include "edid-decode.h"
#define printf (void)
#define ARRAY_SIZE(x) (sizeof(x) / sizeof(*(x)))
static int claims_one_point_oh = 0;
static int claims_one_point_two = 0;
static int claims_one_point_three = 0;
static int claims_one_point_four = 0;
static int nonconformant_digital_display = 0;
static int nonconformant_extension = 0;
static int did_detailed_timing = 0;
static int has_name_descriptor = 0;
static int name_descriptor_terminated = 0;
static int has_range_descriptor = 0;
static int has_preferred_timing = 0;
static int has_valid_checksum = 1;
static int has_valid_cvt = 1;
static int has_valid_dummy_block = 1;
static int has_valid_week = 0;
static int has_valid_year = 0;
static int has_valid_detailed_blocks = 0;
static int has_valid_extension_count = 0;
static int has_valid_descriptor_ordering = 1;
static int has_valid_descriptor_pad = 1;
static int has_valid_range_descriptor = 1;
static int has_valid_max_dotclock = 1;
static int has_valid_string_termination = 1;
static int manufacturer_name_well_formed = 0;
static int seen_non_detailed_descriptor = 0;
static int warning_excessive_dotclock_correction = 0;
static int warning_zero_preferred_refresh = 0;
static int conformant = 1;
static char tmp[32];
static char tmp2[13];
struct value {
int value;
const char *description;
};
struct field {
const char *name;
int start, end;
struct value *values;
int n_values;
};
#define DEFINE_FIELD(n, var, s, e, ...) \
static struct value var##_values[] = { \
__VA_ARGS__ \
}; \
static struct field var = { \
.name = n, \
.start = s, \
.end = e, \
.values = var##_values, \
.n_values = ARRAY_SIZE(var##_values), \
}
static void
decode_value(struct field *field, int val, const char *prefix)
{
struct value *v;
int i;
for (i = 0; i < field->n_values; i++) {
v = &field->values[i];
if (v->value == val)
break;
}
if (i == field->n_values) {
printf("%s%s: %d\n", prefix, field->name, val);
return;
}
printf("%s%s: %s (%d)\n", prefix, field->name, v->description, val);
}
static void
_decode(struct field **fields, int n_fields, int data, const char *prefix)
{
int i;
for (i = 0; i < n_fields; i++) {
struct field *f = fields[i];
int field_length = f->end - f->start + 1;
int val;
if (field_length == 32)
val = data;
else
val = (data >> f->start) & ((1 << field_length) - 1);
decode_value(f, val, prefix);
}
}
#define decode(fields, data, prefix) \
_decode(fields, ARRAY_SIZE(fields), data, prefix)
static char *manufacturer_name(unsigned char *x)
{
static char name[4];
name[0] = ((x[0] & 0x7C) >> 2) + '@';
name[1] = ((x[0] & 0x03) << 3) + ((x[1] & 0xE0) >> 5) + '@';
name[2] = (x[1] & 0x1F) + '@';
name[3] = 0;
if (isupper(name[0]) && isupper(name[1]) && isupper(name[2]))
manufacturer_name_well_formed = 1;
return name;
}
static int
detailed_cvt_descriptor(unsigned char *x, int first)
{
const unsigned char empty[3] = { 0, 0, 0 };
char *names[] = { "50", "60", "75", "85" };
int width, height;
int valid = 1;
int fifty = 0, sixty = 0, seventyfive = 0, eightyfive = 0, reduced = 0;
if (!first && !memcmp(x, empty, 3))
return valid;
height = x[0];
height |= (x[1] & 0xf0) << 4;
height++;
height *= 2;
switch (x[1] & 0x0c) {
case 0x00:
width = (height * 4) / 3; break;
case 0x04:
width = (height * 16) / 9; break;
case 0x08:
width = (height * 16) / 10; break;
case 0x0c:
width = (height * 15) / 9; break;
}
if (x[1] & 0x03)
valid = 0;
if (x[2] & 0x80)
valid = 0;
if (!(x[2] & 0x1f))
valid = 0;
fifty = (x[2] & 0x10);
sixty = (x[2] & 0x08);
seventyfive = (x[2] & 0x04);
eightyfive = (x[2] & 0x02);
reduced = (x[2] & 0x01);
if (!valid) {
printf(" (broken)\n");
} else {
printf(" %dx%d @ ( %s%s%s%s%s) Hz (%s%s preferred)\n", width, height,
fifty ? "50 " : "",
sixty ? "60 " : "",
seventyfive ? "75 " : "",
eightyfive ? "85 " : "",
reduced ? "60RB " : "",
names[(x[2] & 0x60) >> 5],
(((x[2] & 0x60) == 0x20) && reduced) ? "RB" : "");
}
return valid;
}
/* extract a string from a detailed subblock, checking for termination */
static char *
extract_string(unsigned char *x, int *valid_termination, int len)
{
static char ret[128];
int i, seen_newline = 0;
memset(ret, 0, sizeof(ret));
for (i = 0; i < len; i++) {
printf("%02x", x[i]);
if (x[i] != 0x0a)
ret[i] = x[i];
printf("\n");
}
return ret;
}
/* 1 means valid data */
static int
detailed_block(unsigned char *x, int in_extension)
{
static unsigned char name[53];
int ha, hbl, hso, hspw, hborder, va, vbl, vso, vspw, vborder;
int i;
char phsync, pvsync, *syncmethod, *stereo;
#if 0
printf("Hex of detail: ");
for (i = 0; i < 18; i++)
printf("%02x", x[i]);
printf("\n");
#endif
if (x[0] == 0 && x[1] == 0) {
/* Monitor descriptor block, not detailed timing descriptor. */
if (x[2] != 0) {
/* 1.3, 3.10.3 */
printf("Monitor descriptor block has byte 2 nonzero (0x%02x)\n",
x[2]);
has_valid_descriptor_pad = 0;
}
if (x[3] != 0xfd && x[4] != 0x00) {
/* 1.3, 3.10.3 */
printf("Monitor descriptor block has byte 4 nonzero (0x%02x)\n",
x[4]);
has_valid_descriptor_pad = 0;
}
seen_non_detailed_descriptor = 1;
if (x[3] <= 0xF) {
/*
* in principle we can decode these, if we know what they are.
* 0x0f seems to be common in laptop panels.
* 0x0e is used by EPI: http://www.epi-standard.org/
*/
printf("Manufacturer-specified data, tag %d\n", x[3]);
return 1;
}
switch (x[3]) {
case 0x10:
printf("Dummy block\n");
for (i = 5; i < 18; i++)
if (x[i] != 0x00)
has_valid_dummy_block = 0;
return 1;
case 0xF7:
/* TODO */
printf("Established timings III\n");
return 1;
case 0xF8:
{
int valid_cvt = 1; /* just this block */
printf("CVT 3-byte code descriptor:\n");
if (x[5] != 0x01) {
has_valid_cvt = 0;
return 0;
}
for (i = 0; i < 4; i++)
valid_cvt &= detailed_cvt_descriptor(x + 6 + (i * 3), (i == 0));
has_valid_cvt &= valid_cvt;
return valid_cvt;
}
case 0xF9:
/* TODO */
printf("Color management data\n");
return 1;
case 0xFA:
/* TODO */
printf("More standard timings\n");
return 1;
case 0xFB:
/* TODO */
printf("Color point\n");
return 1;
case 0xFC:
/* XXX should check for spaces after the \n */
/* XXX check: terminated with 0x0A, padded with 0x20 */
has_name_descriptor = 1;
if (strchr((char *)name, '\n')) return 1;
strncat((char *)name, (char *)x + 5, 13);
if (strchr((char *)name, '\n')) {
name_descriptor_terminated = 1;
strcpy(tmp2, extract_string((char *)name, &has_valid_string_termination, 13));
}
return 1;
case 0xFD:
{
int h_max_offset = 0, h_min_offset = 0;
int v_max_offset = 0, v_min_offset = 0;
int is_cvt = 0;
has_range_descriptor = 1;
char *range_class = "";
/*
* XXX todo: implement feature flags, vtd blocks
* XXX check: ranges are well-formed; block termination if no vtd
*/
if (claims_one_point_four) {
if (x[4] & 0x02) {
v_max_offset = 255;
if (x[4] & 0x01) {
v_min_offset = 255;
}
}
if (x[4] & 0x04) {
h_max_offset = 255;
if (x[4] & 0x03) {
h_min_offset = 255;
}
}
} else if (x[4]) {
has_valid_range_descriptor = 0;
}
/*
* despite the values, this is not a bitfield.
*/
switch (x[10]) {
case 0x00: /* default gtf */
range_class = "GTF";
break;
case 0x01: /* range limits only */
range_class = "bare limits";
if (!claims_one_point_four)
has_valid_range_descriptor = 0;
break;
case 0x02: /* secondary gtf curve */
range_class = "GTF with icing";
break;
case 0x04: /* cvt */
range_class = "CVT";
is_cvt = 1;
if (!claims_one_point_four)
has_valid_range_descriptor = 0;
break;
default: /* invalid */
has_valid_range_descriptor = 0;
range_class = "invalid";
break;
}
if (x[5] + v_min_offset > x[6] + v_max_offset)
has_valid_range_descriptor = 0;
if (x[7] + h_min_offset > x[8] + h_max_offset)
has_valid_range_descriptor = 0;
printf("Monitor ranges (%s): %d-%dHz V, %d-%dkHz H",
range_class,
x[5] + v_min_offset, x[6] + v_max_offset,
x[7] + h_min_offset, x[8] + h_max_offset);
if (x[9])
printf(", max dotclock %dMHz\n", x[9] * 10);
else {
if (claims_one_point_four)
has_valid_max_dotclock = 0;
printf("\n");
}
if (is_cvt) {
int max_h_pixels = 0;
printf("CVT version %d.%d\n", x[11] & 0xf0 >> 4, x[11] & 0x0f);
if (x[12] & 0xfc) {
int raw_offset = (x[12] & 0xfc) >> 2;
printf("Real max dotclock: %.2fMHz\n",
(x[9] * 10) - (raw_offset * 0.25));
if (raw_offset >= 40)
warning_excessive_dotclock_correction = 1;
}
max_h_pixels = x[12] & 0x03;
max_h_pixels <<= 8;
max_h_pixels |= x[13];
max_h_pixels *= 8;
if (max_h_pixels)
printf("Max active pixels per line: %d\n", max_h_pixels);
printf("Supported aspect ratios: %s %s %s %s %s\n",
x[14] & 0x80 ? "4:3" : "",
x[14] & 0x40 ? "16:9" : "",
x[14] & 0x20 ? "16:10" : "",
x[14] & 0x10 ? "5:4" : "",
x[14] & 0x08 ? "15:9" : "");
if (x[14] & 0x07)
has_valid_range_descriptor = 0;
printf("Preferred aspect ratio: ");
switch((x[15] & 0xe0) >> 5) {
case 0x00: printf("4:3"); break;
case 0x01: printf("16:9"); break;
case 0x02: printf("16:10"); break;
case 0x03: printf("5:4"); break;
case 0x04: printf("15:9"); break;
default: printf("(broken)"); break;
}
printf("\n");
if (x[15] & 0x04)
printf("Supports CVT standard blanking\n");
if (x[15] & 0x10)
printf("Supports CVT reduced blanking\n");
if (x[15] & 0x07)
has_valid_range_descriptor = 0;
if (x[16] & 0xf0) {
printf("Supported display scaling:\n");
if (x[16] & 0x80)
printf(" Horizontal shrink\n");
if (x[16] & 0x40)
printf(" Horizontal stretch\n");
if (x[16] & 0x20)
printf(" Vertical shrink\n");
if (x[16] & 0x10)
printf(" Vertical stretch\n");
}
if (x[16] & 0x0f)
has_valid_range_descriptor = 0;
if (x[17])
printf("Preferred vertical refresh: %d Hz\n", x[17]);
else
warning_zero_preferred_refresh = 1;
}
/*
* Slightly weird to return a global, but I've never seen any
* EDID block wth two range descriptors, so it's harmless.
*/
return has_valid_range_descriptor;
}
case 0xFE:
/*
* TODO: Two of these in a row, in the third and fourth slots,
* seems to be specified by SPWG: http://www.spwg.org/
*/
printf("ASCII string: %s\n",
extract_string(x + 5, &has_valid_string_termination, 13));
return 1;
case 0xFF:
strcpy(tmp, extract_string(x + 5, &has_valid_string_termination, 13));
return 1;
default:
printf("Unknown monitor description type %d\n", x[3]);
return 0;
}
}
if (seen_non_detailed_descriptor && !in_extension) {
has_valid_descriptor_ordering = 0;
}
did_detailed_timing = 1;
ha = (x[2] + ((x[4] & 0xF0) << 4));
hbl = (x[3] + ((x[4] & 0x0F) << 8));
hso = (x[8] + ((x[11] & 0xC0) << 2));
hspw = (x[9] + ((x[11] & 0x30) << 4));
hborder = x[15];
va = (x[5] + ((x[7] & 0xF0) << 4));
vbl = (x[6] + ((x[7] & 0x0F) << 8));
vso = ((x[10] >> 4) + ((x[11] & 0x0C) << 2));
vspw = ((x[10] & 0x0F) + ((x[11] & 0x03) << 4));
vborder = x[16];
switch ((x[17] & 0x18) >> 3) {
case 0x00:
syncmethod = " analog composite";
break;
case 0x01:
syncmethod = " bipolar analog composite";
break;
case 0x02:
syncmethod = " digital composite";
break;
case 0x03:
syncmethod = "";
break;
}
pvsync = (x[17] & (1 << 2)) ? '+' : '-';
phsync = (x[17] & (1 << 1)) ? '+' : '-';
switch (x[17] & 0x61) {
case 0x20:
stereo = "field sequential L/R";
break;
case 0x40:
stereo = "field sequential R/L";
break;
case 0x21:
stereo = "interleaved right even";
break;
case 0x41:
stereo = "interleaved left even";
break;
case 0x60:
stereo = "four way interleaved";
break;
case 0x61:
stereo = "side by side interleaved";
break;
default:
stereo = "";
break;
}
printf("Detailed mode: Clock %.3f MHz, %d mm x %d mm\n"
" %4d %4d %4d %4d hborder %d\n"
" %4d %4d %4d %4d vborder %d\n"
" %chsync %cvsync%s%s %s\n",
(x[0] + (x[1] << 8)) / 100.0,
(x[12] + ((x[14] & 0xF0) << 4)),
(x[13] + ((x[14] & 0x0F) << 8)),
ha, ha + hso, ha + hso + hspw, ha + hbl, hborder,
va, va + vso, va + vso + vspw, va + vbl, vborder,
phsync, pvsync, syncmethod, x[17] & 0x80 ? " interlaced" : "",
stereo
);
/* XXX flag decode */
return 1;
}
static void
do_checksum(unsigned char *x)
{
printf("Checksum: 0x%hx", x[0x7f]);
{
unsigned char sum = 0;
int i;
for (i = 0; i < 128; i++)
sum += x[i];
if (sum) {
printf(" (should be 0x%hx)", (unsigned char)(x[0x7f] - sum));
has_valid_checksum = 0;
} else printf(" (valid)");
}
printf("\n");
}
/* CEA extension */
static const char *
audio_format(unsigned char x)
{
switch (x) {
case 0: return "RESERVED";
case 1: return "Linear PCM";
case 2: return "AC-3";
case 3: return "MPEG 1 (Layers 1 & 2)";
case 4: return "MPEG 1 Layer 3 (MP3)";
case 5: return "MPEG2 (multichannel)";
case 6: return "AAC";
case 7: return "DTS";
case 8: return "ATRAC";
case 9: return "One Bit Audio";
case 10: return "Dolby Digital+";
case 11: return "DTS-HD";
case 12: return "MAT (MLP)";
case 13: return "DST";
case 14: return "WMA Pro";
case 15: return "RESERVED";
}
return "BROKEN"; /* can't happen */
}
static void
cea_audio_block(unsigned char *x)
{
int i, format;
int length = x[0] & 0x1f;
if (length % 3) {
printf("Broken CEA audio block length %d\n", length);
/* XXX non-conformant */
return;
}
for (i = 1; i < length; i += 3) {
format = (x[i] & 0x78) >> 3;
printf(" %s, max channels %d\n", audio_format(format),
x[i] & 0x07);
printf(" Supported sample rates (kHz):%s%s%s%s%s%s%s\n",
(x[i+1] & 0x40) ? " 192" : "",
(x[i+1] & 0x20) ? " 176.4" : "",
(x[i+1] & 0x10) ? " 96" : "",
(x[i+1] & 0x08) ? " 88.2" : "",
(x[i+1] & 0x04) ? " 48" : "",
(x[i+1] & 0x02) ? " 44.1" : "",
(x[i+1] & 0x01) ? " 32" : "");
if (format == 1) {
printf(" Supported sample sizes (bits):%s%s%s\n",
(x[2] & 0x04) ? " 24" : "",
(x[2] & 0x02) ? " 20" : "",
(x[2] & 0x01) ? " 16" : "");
} else if (format <= 8) {
printf(" Maximum bit rate: %d kHz\n", x[2] * 8);
}
}
}
static const char *edid_cea_modes[] = {
"640x480@60Hz",
"720x480@60Hz",
"720x480@60Hz",
"1280x720@60Hz",
"1920x1080i@60Hz",
"1440x480i@60Hz",
"1440x480i@60Hz",
"1440x240@60Hz",
"1440x240@60Hz",
"2880x480i@60Hz",
"2880x480i@60Hz",
"2880x240@60Hz",
"2880x240@60Hz",
"1440x480@60Hz",
"1440x480@60Hz",
"1920x1080@60Hz",
"720x576@50Hz",
"720x576@50Hz",
"1280x720@50Hz",
"1920x1080i@50Hz",
"1440x576i@50Hz",
"1440x576i@50Hz",
"1440x288@50Hz",
"1440x288@50Hz",
"2880x576i@50Hz",
"2880x576i@50Hz",
"2880x288@50Hz",
"2880x288@50Hz",
"1440x576@50Hz",
"1440x576@50Hz",
"1920x1080@50Hz",
"1920x1080@24Hz",
"1920x1080@25Hz",
"1920x1080@30Hz",
"2880x480@60Hz",
"2880x480@60Hz",
"2880x576@50Hz",
"2880x576@50Hz",
"1920x1080i@50Hz",
"1920x1080i@100Hz",
"1280x720@100Hz",
"720x576@100Hz",
"720x576@100Hz",
"1440x576@100Hz",
"1440x576@100Hz",
"1920x1080i@120Hz",
"1280x720@120Hz",
"720x480@120Hz",
"720x480@120Hz",
"1440x480i@120Hz",
"1440x480i@120Hz",
"720x576@200Hz",
"720x576@200Hz",
"1440x576i@200Hz",
"1440x576i@200Hz",
"720x480@240Hz",
"720x480@240Hz",
"1440x480i@240Hz",
"1440x480i@240Hz",
"1280x720@24Hz",
"1280x720@25Hz",
"1280x720@30Hz",
"1920x1080@120Hz",
"1920x1080@100Hz",
};
static void
cea_video_block(unsigned char *x)
{
int i;
int length = x[0] & 0x1f;
for (i = 1; i <= length; i++) {
unsigned char vic = x[i] & 0x7f;
unsigned char native = x[i] & 0x80;
const char *mode;
int index;
index = vic - 1;
if (index < ARRAY_SIZE(edid_cea_modes))
mode = edid_cea_modes[index];
else
mode = "Unknown mode";
printf(" VIC %02d %s %s\n", vic, mode, native ? "(native)" : "");
}
}
static const char *edid_cea_hdmi_modes[] = {
"3840x2160@30Hz",
"3840x2160@25Hz",
"3840x2160@24Hz",
"4096x2160@24Hz",
};
static void
cea_hdmi_block(unsigned char *x)
{
int length = x[0] & 0x1f;
printf(" (HDMI)\n");
printf(" Source physical address %d.%d.%d.%d\n", x[4] >> 4, x[4] & 0x0f,
x[5] >> 4, x[5] & 0x0f);
if (length > 5) {
if (x[6] & 0x80)
printf(" Supports_AI\n");
if (x[6] & 0x40)
printf(" DC_48bit\n");
if (x[6] & 0x20)
printf(" DC_36bit\n");
if (x[6] & 0x10)
printf(" DC_30bit\n");
if (x[6] & 0x08)
printf(" DC_Y444\n");
/* two reserved */
if (x[6] & 0x01)
printf(" DVI_Dual\n");
}
if (length > 6)
printf(" Maximum TMDS clock: %dMHz\n", x[7] * 5);
/* XXX the walk here is really ugly, and needs to be length-checked */
if (length > 7) {
int b = 0;
if (x[8] & 0x80) {
printf(" Video latency: %d\n", x[9 + b]);
printf(" Audio latency: %d\n", x[10 + b]);
b += 2;
}
if (x[8] & 0x40) {
printf(" Interlaced video latency: %d\n", x[9 + b]);
printf(" Interlaced audio latency: %d\n", x[10 + b]);
b += 2;
}
if (x[8] & 0x20) {
int mask = 0, formats = 0;
int len_vic, len_3d;
printf(" Extended HDMI video details:\n");
if (x[9 + b] & 0x80)
printf(" 3D present\n");
if ((x[9 + b] & 0x60) == 0x20) {
printf(" All advertised VICs are 3D-capable\n");
formats = 1;
}
if ((x[9 + b] & 0x60) == 0x40) {
printf(" 3D-capable-VIC mask present\n");
formats = 1;
mask = 1;
}
switch (x[9 + b] & 0x18) {
case 0x00: break;
case 0x08:
printf(" Base EDID image size is aspect ratio\n");
break;
case 0x10:
printf(" Base EDID image size is in units of 1cm\n");
break;
case 0x18:
printf(" Base EDID image size is in units of 5cm\n");
break;
}
len_vic = (x[10 + b] & 0xe0) >> 5;
len_3d = (x[10 + b] & 0x1f) >> 0;
b += 2;
if (len_vic) {
int i;
for (i = 0; i < len_vic; i++) {
unsigned char vic = x[9 + b + i];
const char *mode;
vic--;
if (vic < ARRAY_SIZE(edid_cea_hdmi_modes))
mode = edid_cea_hdmi_modes[vic];
else
mode = "Unknown mode";
printf(" HDMI VIC %d %s\n", vic, mode);
}
b += len_vic;
}
if (len_3d) {
if (formats) {
/* 3D_Structure_ALL_15..8 */
if (x[9 + b] & 0x80)
printf(" 3D: Side-by-side (half, quincunx)\n");
if (x[9 + b] & 0x01)
printf(" 3D: Side-by-side (half, horizontal)\n");
/* 3D_Structure_ALL_7..0 */
if (x[10 + b] & 0x40)
printf(" 3D: Top-and-bottom\n");
if (x[10 + b] & 0x20)
printf(" 3D: L + depth + gfx + gfx-depth\n");
if (x[10 + b] & 0x10)
printf(" 3D: L + depth\n");
if (x[10 + b] & 0x08)
printf(" 3D: Side-by-side (full)\n");
if (x[10 + b] & 0x04)
printf(" 3D: Line-alternative\n");
if (x[10 + b] & 0x02)
printf(" 3D: Field-alternative\n");
if (x[10 + b] & 0x01)
printf(" 3D: Frame-packing\n");
b += 2;
len_3d -= 2;
}
if (mask) {
int i;
printf(" 3D VIC indices:");
/* worst bit ordering ever */
for (i = 0; i < 8; i++)
if (x[10 + b] & (1 << i))
printf(" %d", i);
for (i = 0; i < 8; i++)
if (x[9 + b] & (1 << i))
printf(" %d", i + 8);
printf("\n");
b += 2;
len_3d -= 2;
}
/*
* list of nibbles:
* 2D_VIC_Order_X
* 3D_Structure_X
* (optionally: 3D_Detail_X and reserved)
*/
if (len_3d > 0) {
int end = b + len_3d;
while (b < end) {
printf(" VIC index %d supports ", x[9 + b] >> 4);
switch (x[9 + b] & 0x0f) {
case 0: printf("frame packing"); break;
case 6: printf("top-and-bottom"); break;
case 8:
if ((x[10 + b] >> 4) == 1) {
printf("side-by-side (half, horizontal)");
break;
}
default: printf("unknown");
}
printf("\n");
if ((x[9 + b] & 0x0f) > 7) {
/* Optional 3D_Detail_X and reserved */
b++;
}
b++;
}
}
}
}
}
}
DEFINE_FIELD("YCbCr quantization", YCbCr_quantization, 7, 7,
{ 0, "No Data" },
{ 1, "Selectable (via AVI YQ)" });
DEFINE_FIELD("RGB quantization", RGB_quantization, 6, 6,
{ 0, "No Data" },
{ 1, "Selectable (via AVI Q)" });
DEFINE_FIELD("PT scan behaviour", PT_scan, 4, 5,
{ 0, "No Data" },
{ 1, "Always Overscannned" },
{ 2, "Always Underscanned" },
{ 3, "Support both over- and underscan" });
DEFINE_FIELD("IT scan behaviour", IT_scan, 2, 3,
{ 0, "IT video formats not supported" },
{ 1, "Always Overscannned" },
{ 2, "Always Underscanned" },
{ 3, "Support both over- and underscan" });
DEFINE_FIELD("CE scan behaviour", CE_scan, 0, 1,
{ 0, "CE video formats not supported" },
{ 1, "Always Overscannned" },
{ 2, "Always Underscanned" },
{ 3, "Support both over- and underscan" });
static struct field *vcdb_fields[] = {
&YCbCr_quantization,
&RGB_quantization,
&PT_scan,
&IT_scan,
&CE_scan,
};
static void
cea_vcdb(unsigned char *x)
{
unsigned char d = x[2];
decode(vcdb_fields, d, " ");
}
static void
cea_block(unsigned char *x)
{
unsigned int oui;
switch ((x[0] & 0xe0) >> 5) {
case 0x01:
printf(" Audio data block\n");
cea_audio_block(x);
break;
case 0x02:
printf(" Video data block\n");
cea_video_block(x);
break;
case 0x03:
/* yes really, endianness lols */
oui = (x[3] << 16) + (x[2] << 8) + x[1];
printf(" Vendor-specific data block, OUI %06x", oui);
if (oui == 0x000c03)
cea_hdmi_block(x);
else
printf("\n");
break;
case 0x04:
printf(" Speaker allocation data block\n");
break;
case 0x05:
printf(" VESA DTC data block\n");
break;
case 0x07:
printf(" Extended tag: ");
switch (x[1]) {
case 0x00:
printf("video capability data block\n");
cea_vcdb(x);
break;
case 0x01:
printf("vendor-specific video data block\n");
break;
case 0x02:
printf("VESA video display device information data block\n");
break;
case 0x03:
printf("VESA video data block\n");
break;
case 0x04:
printf("HDMI video data block\n");
break;
case 0x05:
printf("Colorimetry data block\n");
break;
case 0x10:
printf("CEA miscellaneous audio fields\n");
break;
case 0x11:
printf("Vendor-specific audio data block\n");
break;
case 0x12:
printf("HDMI audio data block\n");
break;
default:
if (x[1] >= 6 && x[1] <= 15)