swaroop: required monitors checks.

1 files changed, 131 insertions, 0 deletions

diff --git a/src/lib/edid.cc b/src/lib/edid.cc
new file mode 100644
index 000000000..3df65d325
--- /dev/null
+++ b/src/lib/edid.cc
@@ -0,0 +1,131 @@
+/*
+    Copyright (C) 2018 Carl Hetherington <cth@carlh.net>
+
+    This file is part of DCP-o-matic.
+
+    DCP-o-matic is free software; you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation; either version 2 of the License, or
+    (at your option) any later version.
+
+    DCP-o-matic is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with DCP-o-matic.  If not, see <http://www.gnu.org/licenses/>.
+
+*/
+
+#include "compose.hpp"
+#include "edid.h"
+#include <dcp/raw_convert.h>
+#include <libxml++/libxml++.h>
+#include <boost/filesystem.hpp>
+#include <boost/algorithm/string.hpp>
+#include <iostream>
+
+#define EDID_SYS_PATH "/sys/class/drm"
+static uint8_t const edid_header[] = { 0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00 };
+
+using std::vector;
+using std::string;
+using std::cout;
+
+vector<Monitor>
+get_monitors()
+{
+	using namespace boost::filesystem;
+	using namespace boost::algorithm;
+
+	vector<Monitor> monitors;
+
+	int card = 0;
+	while (true) {
+		path card_dir = String::compose("%1/card%2", EDID_SYS_PATH, card);
+		if (!is_directory(card_dir)) {
+			break;
+		}
+
+		for (directory_iterator i = directory_iterator(card_dir); i != directory_iterator(); ++i) {
+			if (!starts_with(i->path().filename().string(), String::compose("card%1", card))) {
+				continue;
+			}
+
+			FILE* edid_file = fopen(path(i->path() / "edid").string().c_str(), "r");
+			if (!edid_file) {
+				continue;
+			}
+
+			uint8_t edid[128];
+			int const N = fread(edid, 1, sizeof(edid), edid_file);
+			fclose(edid_file);
+			if (N != 128) {
+				continue;
+			}
+
+			if (memcmp(edid, edid_header, 8) != 0) {
+				continue;
+			}
+
+			Monitor mon;
+
+			uint16_t mid = (edid[8] << 8) | edid[9];
+			mon.manufacturer_id += char(((mid >> 10) & 0x1f) + 'A' - 1);
+			mon.manufacturer_id += char(((mid >> 5) & 0x1f) + 'A' - 1);
+			mon.manufacturer_id += char(((mid >> 0) & 0x1f) + 'A' - 1);
+
+			mon.manufacturer_product_code = (edid[11] << 8) | edid[10];
+
+			mon.serial_number = (edid[15] << 24) | (edid[14] << 16) | (edid[13] << 8) | edid[12];
+			mon.week_of_manufacture = edid[16];
+			mon.year_of_manufacture = edid[17];
+			monitors.push_back (mon);
+		}
+
+		++card;
+	}
+
+	return monitors;
+}
+
+Monitor::Monitor ()
+	: manufacturer_product_code (0)
+	, serial_number (0)
+	, week_of_manufacture (0)
+	, year_of_manufacture (0)
+{
+
+}
+
+Monitor::Monitor (cxml::ConstNodePtr node)
+	: manufacturer_id(node->string_child("ManufacturerId"))
+	, manufacturer_product_code(node->number_child<uint32_t>("ManufacturerProductCode"))
+	, serial_number(node->number_child<uint32_t>("SerialNumber"))
+	, week_of_manufacture(node->number_child<int>("WeekOfManufacture"))
+	, year_of_manufacture(node->number_child<int>("YearOfManufacture"))
+
+{
+
+}
+
+void
+Monitor::as_xml (xmlpp::Node* parent) const
+{
+	parent->add_child("ManufacturerId")->add_child_text(manufacturer_id);
+	parent->add_child("ManufacturerProductCode")->add_child_text(dcp::raw_convert<string>(manufacturer_product_code));
+	parent->add_child("SerialNumber")->add_child_text(dcp::raw_convert<string>(serial_number));
+	parent->add_child("WeekOfManufacture")->add_child_text(dcp::raw_convert<string>(week_of_manufacture));
+	parent->add_child("YearOfManufacture")->add_child_text(dcp::raw_convert<string>(year_of_manufacture));
+}
+
+bool
+operator== (Monitor const & a, Monitor const & b)
+{
+	return a.manufacturer_id == b.manufacturer_id &&
+		a.manufacturer_product_code == b.manufacturer_product_code &&
+		a.serial_number == b.serial_number &&
+		a.week_of_manufacture == b.week_of_manufacture &&
+		a.year_of_manufacture == b.year_of_manufacture;
+}