components/cdm/renderer/widevine_key_system_properties.h

// 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.

#ifndef COMPONENTS_CDM_RENDERER_WIDEVINE_KEY_SYSTEM_PROPERTIES_H_
#define COMPONENTS_CDM_RENDERER_WIDEVINE_KEY_SYSTEM_PROPERTIES_H_

#include <string>
#include <vector>

#include "base/containers/flat_set.h"
#include "media/base/key_system_properties.h"

namespace cdm {

// Implementation of KeySystemProperties for Widevine key system.
class WidevineKeySystemProperties : public media::KeySystemProperties {
 public:
  // Robustness values understood by the Widevine key system.
  // Note: GetRobustnessConfigRule is dependent on the order of these.
  enum class Robustness {
    INVALID,
    EMPTY,
    SW_SECURE_CRYPTO,
    SW_SECURE_DECODE,
    HW_SECURE_CRYPTO,
    HW_SECURE_DECODE,
    HW_SECURE_ALL,
  };

  WidevineKeySystemProperties(
      base::flat_set<media::EncryptionMode> supported_encryption_schemes,
      media::SupportedCodecs supported_codecs,
      media::SupportedCodecs supported_hw_secure_codecs,
      Robustness max_audio_robustness,
      Robustness max_video_robustness,
      media::EmeSessionTypeSupport persistent_license_support,
      media::EmeSessionTypeSupport persistent_release_message_support,
      media::EmeFeatureSupport persistent_state_support,
      media::EmeFeatureSupport distinctive_identifier_support);
  ~WidevineKeySystemProperties() override;

  std::string GetKeySystemName() const override;
  bool IsSupportedInitDataType(
      media::EmeInitDataType init_data_type) const override;
  bool IsEncryptionSchemeSupported(
      media::EncryptionMode encryption_scheme) const override;

  media::SupportedCodecs GetSupportedCodecs() const override;
  media::SupportedCodecs GetSupportedHwSecureCodecs() const override;

  media::EmeConfigRule GetRobustnessConfigRule(
      media::EmeMediaType media_type,
      const std::string& requested_robustness) const override;
  media::EmeSessionTypeSupport GetPersistentLicenseSessionSupport()
      const override;
  media::EmeSessionTypeSupport GetPersistentReleaseMessageSessionSupport()
      const override;
  media::EmeFeatureSupport GetPersistentStateSupport() const override;
  media::EmeFeatureSupport GetDistinctiveIdentifierSupport() const override;

 private:
  const base::flat_set<media::EncryptionMode> supported_encryption_schemes_;
  const media::SupportedCodecs supported_codecs_;
  const media::SupportedCodecs supported_hw_secure_codecs_;
  const Robustness max_audio_robustness_;
  const Robustness max_video_robustness_;
  const media::EmeSessionTypeSupport persistent_license_support_;
  const media::EmeSessionTypeSupport persistent_release_message_support_;
  const media::EmeFeatureSupport persistent_state_support_;
  const media::EmeFeatureSupport distinctive_identifier_support_;
};

}  // namespace cdm

#endif  // COMPONENTS_CDM_RENDERER_WIDEVINE_KEY_SYSTEM_PROPERTIES_H_