Implement robustness strings in requestMediaKeySystemAccess().

media/base/eme_constants.h

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef MEDIA_BASE_EME_CONSTANTS_H_
 #define MEDIA_BASE_EME_CONSTANTS_H_
 
 #include <stdint.h>
 
 namespace media {
@@ skipping 31 matching lines @@
   EME_CODEC_MP4_ALL = (EME_CODEC_MP4_AUDIO_ALL | EME_CODEC_MP4_VIDEO_ALL),
   EME_CODEC_ALL = (EME_CODEC_WEBM_ALL | EME_CODEC_MP4_ALL),
 #else
   EME_CODEC_ALL = EME_CODEC_WEBM_ALL,
 #endif  // defined(USE_PROPRIETARY_CODECS)
 };
 
 typedef uint32_t SupportedInitDataTypes;
 typedef uint32_t SupportedCodecs;
 
+// Note: The encrypted media permission, referenced in several enums below, is
+// equivalent to access to a distinctive identifier. For Widevine, we assume
+// that it is equivalent to remote attestation succeeding. (Remote attestation

[ddorwin, 2015/03/18 01:08:04]

This only applies to Chrome OS. That should be clear.
Instead, you could just say this is to the best of our knowledge and/or based on
the expected outcome.

[sandersd (OOO until July 31), 2015/03/18 20:41:37]

Done.

+// can fail for other reasons, but those reasons are not yet considered.)
+
 enum EmeSessionTypeSupport {
   // Invalid default value.
   EME_SESSION_TYPE_INVALID,
   // The session type is not supported.
   EME_SESSION_TYPE_NOT_SUPPORTED,
   // The session type is supported if the encrypted media permission is granted.
   EME_SESSION_TYPE_SUPPORTED_WITH_PERMISSION,
   // The session type is always supported.
   EME_SESSION_TYPE_SUPPORTED,
 };
 
+// Used to declare support for distinctive identifier and persistent state.
 enum EmeFeatureSupport {
   // Invalid default value.
   EME_FEATURE_INVALID,
   // Access to the feature is not supported at all.
   EME_FEATURE_NOT_SUPPORTED,
   // Access to the feature may be requested if the encrypted media permission is
   // granted.
   EME_FEATURE_REQUESTABLE_WITH_PERMISSION,
   // Access to the feature may be requested.
   EME_FEATURE_REQUESTABLE,
   // Access to the feature cannot be blocked.
   EME_FEATURE_ALWAYS_ENABLED,
 };
 
+// Used to query support for distinctive identifier and persistent state.
 enum EmeFeatureRequirement {
   EME_FEATURE_NOT_ALLOWED,
   EME_FEATURE_OPTIONAL,
   EME_FEATURE_REQUIRED,
 };
 
+enum class EmeMediaType {
+  AUDIO,
+  VIDEO,
+};
+
+// Robustness values understood by KeySystems. Each value imples all those
+// before it. (This may need to be redesigned to support non-Widevine CDMs.)
+enum class EmeRobustness {
+  INVALID,
+  EMPTY,
+  SW_SECURE_CRYPTO,
+  SW_SECURE_DECODE,
+  HW_SECURE_CRYPTO,
+  HW_SECURE_DECODE,
+  HW_SECURE_ALL,
+};
+
+// Configuration rules indicate the configuration state required to support a
+// configuration option (note: a configuration option may be disallowing a
+// feature). Configuration rules are used to answer queries about distinctive
+// identifier, persistent state, and robustness requirements, as well as to
+// describe support for different session types.
+enum class EmeConfigRule {
+  // The configuration option is not supported.
+  NOT_SUPPORTED,
+  // The configuration option is supported if the encrypted media permission is
+  // granted.
+  PERMISSION_REQUIRED,
+  // The configuration option is supported, but the user experience may be
+  // improved if the encrypted media permission is granted.
+  PERMISSION_RECOMMENDED,
+  // The configuration option is supported without conditions.
+  SUPPORTED,
+};
+
 }  // namespace media
 
 #endif  // MEDIA_BASE_EME_CONSTANTS_H_