1a8aa0dd05
Builds libwvmdrmengine.so, which is loaded by the new MediaDrm APIs to support playback of Widevine/CENC protected content. Change-Id: I6f57dd37083dfd96c402cb9dd137c7d74edc8f1c
84 lines
2.9 KiB
C++
84 lines
2.9 KiB
C++
// Copyright 2013 Google Inc. All Rights Reserved.
|
|
|
|
#ifndef CDM_BASE_POLICY_ENGINE_H_
|
|
#define CDM_BASE_POLICY_ENGINE_H_
|
|
|
|
#include <string>
|
|
|
|
#include "license_protocol.pb.h"
|
|
#include "wv_cdm_types.h"
|
|
|
|
namespace wvcdm {
|
|
|
|
// This acts as an oracle that basically says "Yes(true) you may still decrypt
|
|
// or no(false) you may not decrypt this data anymore."
|
|
class PolicyEngine {
|
|
public:
|
|
PolicyEngine();
|
|
~PolicyEngine();
|
|
|
|
// |current_time| is used to check if license has to be renewed or expired.
|
|
void OnTimerEvent(int64_t current_time, bool event_occurred, CdmEventType& event);
|
|
|
|
// SetLicense is used in handling the initial license response. It stores
|
|
// an exact copy of the policy information stored in the license.
|
|
// The license state transitions to kLicenseStateCanPlay if the license
|
|
// permits playback.
|
|
void SetLicense(const video_widevine_server::sdk::License& license);
|
|
|
|
// UpdateLicense is used in handling a license response for a renewal request.
|
|
// The response may only contain any policy fields that have changed. In this
|
|
// case an exact copy is not what we want to happen. We also will receive an
|
|
// updated license_start_time from the server. The license will transition to
|
|
// kLicenseStateCanPlay if the license permits playback.
|
|
void UpdateLicense(const video_widevine_server::sdk::License& license);
|
|
|
|
const video_widevine_server::sdk::LicenseIdentification& license_id() {
|
|
return license_id_;
|
|
}
|
|
|
|
private:
|
|
typedef enum {
|
|
kLicenseStateInitial,
|
|
kLicenseStateCanPlay,
|
|
kLicenseStateCannotPlay,
|
|
kLicenseStateNeedRenewal,
|
|
kLicenseStateWaitingLicenseUpdate,
|
|
kLicenseStateExpired
|
|
} LicenseState;
|
|
|
|
bool IsLicenseDurationExpired(int64_t current_time);
|
|
bool IsRenewalDelayExpired(int64_t current_time);
|
|
bool IsRenewalRecoveryDurationExpired(int64_t current_time);
|
|
bool IsRenewalRetryIntervalExpired(int64_t current_time);
|
|
|
|
void UpdateRenewalRequest(int64_t current_time);
|
|
|
|
LicenseState license_state_;
|
|
|
|
// This is the current policy information for this license. This gets updated
|
|
// as license renewals occur.
|
|
video_widevine_server::sdk::License::Policy policy_;
|
|
|
|
// This is the license id field from server response. This data gets passed
|
|
// back to the server in each renewal request. When we get a renewal response
|
|
// from the license server we will get an updated id field.
|
|
video_widevine_server::sdk::LicenseIdentification license_id_;
|
|
|
|
// This is the license start time that gets sent from the server in each
|
|
// license request or renewal.
|
|
int64_t license_start_time_;
|
|
|
|
// This is used as a reference point for policy management. This value
|
|
// represents an offset from license_start_time_. This is used to calculate
|
|
// the time where renewal retries should occur.
|
|
int64_t next_renewal_time_;
|
|
int64_t policy_max_duration_seconds_;
|
|
|
|
CORE_DISALLOW_COPY_AND_ASSIGN(PolicyEngine);
|
|
};
|
|
} // wvcdm
|
|
|
|
#endif // CDM_BASE_POLICY_ENGINE_H_
|
|
|