Revert of Convert Widevine and Android platform key systems to KeySystemProperties

components/cdm/renderer/widevine_key_system_properties.cc

-// Copyright 2016 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.
-
-#include "components/cdm/renderer/widevine_key_system_properties.h"
-
-#include "widevine_cdm_version.h"  // In SHARED_INTERMEDIATE_DIR.
-
-#if defined(WIDEVINE_CDM_AVAILABLE)
-
-using media::EmeConfigRule;
-using media::EmeFeatureSupport;
-using media::EmeInitDataType;
-using media::EmeMediaType;
-using media::EmeRobustness;
-using media::EmeSessionTypeSupport;
-using media::SupportedCodecs;
-
-namespace cdm {
-namespace {
-
-EmeRobustness ConvertRobustness(const std::string& robustness) {
-  if (robustness.empty())
-    return EmeRobustness::EMPTY;
-  if (robustness == "SW_SECURE_CRYPTO")
-    return EmeRobustness::SW_SECURE_CRYPTO;
-  if (robustness == "SW_SECURE_DECODE")
-    return EmeRobustness::SW_SECURE_DECODE;
-  if (robustness == "HW_SECURE_CRYPTO")
-    return EmeRobustness::HW_SECURE_CRYPTO;
-  if (robustness == "HW_SECURE_DECODE")
-    return EmeRobustness::HW_SECURE_DECODE;
-  if (robustness == "HW_SECURE_ALL")
-    return EmeRobustness::HW_SECURE_ALL;
-  return EmeRobustness::INVALID;
-}
-
-}  // namespace
-
-WidevineKeySystemProperties::WidevineKeySystemProperties(
-    media::SupportedCodecs supported_codecs,
-#if defined(OS_ANDROID)
-    media::SupportedCodecs supported_secure_codecs,
-#endif  // defined(OS_ANDROID)
-    media::EmeRobustness max_audio_robustness,
-    media::EmeRobustness max_video_robustness,
-    media::EmeSessionTypeSupport persistent_license_support,
-    media::EmeSessionTypeSupport persistent_release_message_support,
-    media::EmeFeatureSupport persistent_state_support,
-    media::EmeFeatureSupport distinctive_identifier_support)
-    : supported_codecs_(supported_codecs),
-#if defined(OS_ANDROID)
-      supported_secure_codecs_(supported_secure_codecs),
-#endif  // defined(OS_ANDROID)
-      max_audio_robustness_(max_audio_robustness),
-      max_video_robustness_(max_video_robustness),
-      persistent_license_support_(persistent_license_support),
-      persistent_release_message_support_(persistent_release_message_support),
-      persistent_state_support_(persistent_state_support),
-      distinctive_identifier_support_(distinctive_identifier_support) {
-}
-
-std::string WidevineKeySystemProperties::GetKeySystemName() const {
-  return kWidevineKeySystem;
-}
-
-bool WidevineKeySystemProperties::IsSupportedInitDataType(
-    EmeInitDataType init_data_type) const {
-  // Here we assume that support for a container imples support for the
-  // associated initialization data type. KeySystems handles validating
-  // |init_data_type| x |container| pairings.
-  if (init_data_type == EmeInitDataType::WEBM)
-    return (supported_codecs_ & media::EME_CODEC_WEBM_ALL) != 0;
-#if defined(USE_PROPRIETARY_CODECS)
-  if (init_data_type == EmeInitDataType::CENC)
-    return (supported_codecs_ & media::EME_CODEC_MP4_ALL) != 0;
-#endif  // defined(USE_PROPRIETARY_CODECS)
-
-  return false;
-}
-
-SupportedCodecs WidevineKeySystemProperties::GetSupportedCodecs() const {
-  return supported_codecs_;
-}
-
-#if defined(OS_ANDROID)
-SupportedCodecs WidevineKeySystemProperties::GetSupportedSecureCodecs() const {
-  return supported_secure_codecs_;
-}
-#endif
-
-EmeConfigRule WidevineKeySystemProperties::GetRobustnessConfigRule(
-    EmeMediaType media_type,
-    const std::string& requested_robustness) const {
-  EmeRobustness robustness = ConvertRobustness(requested_robustness);
-  if (robustness == EmeRobustness::INVALID)
-    return EmeConfigRule::NOT_SUPPORTED;
-
-  EmeRobustness max_robustness = EmeRobustness::INVALID;
-  switch (media_type) {
-    case EmeMediaType::AUDIO:
-      max_robustness = max_audio_robustness_;
-      break;
-    case EmeMediaType::VIDEO:
-      max_robustness = max_video_robustness_;
-      break;
-  }
-
-  // We can compare robustness levels whenever they are not HW_SECURE_CRYPTO
-  // and SW_SECURE_DECODE in some order. If they are exactly those two then the
-  // robustness requirement is not supported.
-  if ((max_robustness == EmeRobustness::HW_SECURE_CRYPTO &&
-       robustness == EmeRobustness::SW_SECURE_DECODE) ||
-      (max_robustness == EmeRobustness::SW_SECURE_DECODE &&
-       robustness == EmeRobustness::HW_SECURE_CRYPTO) ||
-      robustness > max_robustness) {
-    return EmeConfigRule::NOT_SUPPORTED;
-  }
-
-#if defined(OS_CHROMEOS)
-  // TODO(ddorwin): Remove this once we have confirmed it is not necessary.
-  // See https://crbug.com/482277
-  if (robustness == EmeRobustness::EMPTY)
-    return EmeConfigRule::SUPPORTED;
-
-  // Hardware security requires remote attestation.
-  if (robustness >= EmeRobustness::HW_SECURE_CRYPTO)
-    return EmeConfigRule::IDENTIFIER_REQUIRED;
-
-  // For video, recommend remote attestation if HW_SECURE_ALL is available,
-  // because it enables hardware accelerated decoding.
-  // TODO(sandersd): Only do this when hardware accelerated decoding is
-  // available for the requested codecs.
-  if (media_type == EmeMediaType::VIDEO &&
-      max_robustness == EmeRobustness::HW_SECURE_ALL) {
-    return EmeConfigRule::IDENTIFIER_RECOMMENDED;
-  }
-#elif defined(OS_ANDROID)
-  // Require hardware secure codecs when SW_SECURE_DECODE or above is specified.
-  if (robustness >= EmeRobustness::SW_SECURE_DECODE) {
-    return EmeConfigRule::HW_SECURE_CODECS_REQUIRED;
-  }
-#endif  // defined(OS_CHROMEOS)
-
-  return EmeConfigRule::SUPPORTED;
-}
-
-EmeSessionTypeSupport
-WidevineKeySystemProperties::GetPersistentLicenseSessionSupport() const {
-  return persistent_license_support_;
-}
-
-EmeSessionTypeSupport
-WidevineKeySystemProperties::GetPersistentReleaseMessageSessionSupport() const {
-  return persistent_release_message_support_;
-}
-
-EmeFeatureSupport WidevineKeySystemProperties::GetPersistentStateSupport()
-    const {
-  return persistent_state_support_;
-}
-
-EmeFeatureSupport WidevineKeySystemProperties::GetDistinctiveIdentifierSupport()
-    const {
-  return distinctive_identifier_support_;
-}
-
-#if defined(ENABLE_PEPPER_CDMS)
-std::string WidevineKeySystemProperties::GetPepperType() const {
-  return kWidevineCdmPluginMimeType;
-}
-#endif
-
-}  // namespace cdm
-
-#endif  // WIDEVINE_CDM_AVAILABLE