Export media_cas_proxy_sdk

strings/BUILD

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+################################################################################
+# Copyright 2017 Google LLC.
+#
+# This software is licensed under the terms defined in the Widevine Master
+# License Agreement. For a copy of this agreement, please contact
+# widevine-licensing@google.com.
+################################################################################
+
+package(
+    default_visibility = ["//visibility:public"],
+)
+
+cc_library(
+    name = "strings",
+    srcs = [
+        "serialize.cc",
+    ],
+    hdrs = [
+        "serialize.h",
+    ],
+    deps = [
+        "//base",
+    ],
+)
+
+cc_test(
+    name = "serialize_test",
+    srcs = ["serialize_test.cc"],
+    deps = [
+        ":strings",
+        "//base",
+        "//testing:gunit_main",
+    ],
+)

strings/serialize.cc

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+////////////////////////////////////////////////////////////////////////////////
+// Copyright 2017 Google LLC.
+//
+// This software is licensed under the terms defined in the Widevine Master
+// License Agreement. For a copy of this agreement, please contact
+// widevine-licensing@google.com.
+////////////////////////////////////////////////////////////////////////////////
+
+#include "strings/serialize.h"
+
+#include <string>
+
+#include "glog/logging.h"
+
+namespace widevine {
+namespace strings {
+
+uint32_t KeyToUint32(const std::string& key) {
+  CHECK_GE(key.size(), 4);
+  return static_cast<uint8_t>(key[0]) << 24 |
+         static_cast<uint8_t>(key[1]) << 16 |
+         static_cast<uint8_t>(key[2]) << 8 | static_cast<uint8_t>(key[3]);
+}
+
+std::string EncodeUint64(uint64_t value) {
+  std::string s;
+  s.resize(sizeof(value));
+  memcpy(&s[0], &value, sizeof(value));
+  return s;
+}
+
+}  // namespace strings
+}  // namespace widevine

strings/serialize.h

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+////////////////////////////////////////////////////////////////////////////////
+// Copyright 2017 Google LLC.
+//
+// This software is licensed under the terms defined in the Widevine Master
+// License Agreement. For a copy of this agreement, please contact
+// widevine-licensing@google.com.
+////////////////////////////////////////////////////////////////////////////////
+
+#ifndef STRINGS_SERIALIZE_H_
+#define STRINGS_SERIALIZE_H_
+
+#include <string>
+
+namespace widevine {
+namespace strings {
+
+// Convert a 4-byte key in network byte order to uint32_t
+uint32_t KeyToUint32(const std::string& key);
+// Encode a unit64 value to a string.
+std::string EncodeUint64(uint64_t value);
+
+}  // namespace strings
+}  // namespace widevine
+
+#endif  // STRINGS_SERIALIZE_H_

strings/serialize_test.cc

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+////////////////////////////////////////////////////////////////////////////////
+// Copyright 2017 Google LLC.
+//
+// This software is licensed under the terms defined in the Widevine Master
+// License Agreement. For a copy of this agreement, please contact
+// widevine-licensing@google.com.
+////////////////////////////////////////////////////////////////////////////////
+//
+// Contains the test cases for EncodeUint64 and KeyToUint32.
+
+#include "strings/serialize.h"
+
+#include "testing/gunit.h"
+
+namespace widevine {
+namespace strings {
+
+TEST(SerializeTest, KeyToUint32) {
+  std::string val = "\x12\x34\x56\x78";
+  EXPECT_EQ(0x12345678, KeyToUint32(val));
+  val = "\x87\x65\x43\x21";
+  EXPECT_EQ(0x87654321, KeyToUint32(val));
+}
+
+TEST(SerializeTest, EncodeUint64) {
+  uint64_t q1 = 0x4142434441424344;
+  std::string uint64_str = EncodeUint64(q1);
+  EXPECT_TRUE(uint64_str == "DCBADCBA" || uint64_str == "ABCDABCD");
+}
+
+}  // namespace strings
+}  // namespace widevine