a8328dd2f9
(This is a merge of http://go/wvgerrit/14531) As an optimization, the Media Server now unloads our library when not in use. This has exposed a bug by which we were never deleting the CDM singleton. Fix is to make WvContentDecryptionModule an Android smart pointer ref base and then make sure all the plugins store a strong pointer to it. The singleton is a weak pointer, so when the last plugin is cleaned up, the CDM will be as well. And on the off chance that the library isn't immediately unloaded, the singleton code will generate a new CDM next time one is needed. Bug: 21153732 Change-Id: Ifaf02fa9afe0a70a8b53e8b92ee0a3d1359ca001
139 lines
5.5 KiB
C++
139 lines
5.5 KiB
C++
// Copyright 2013 Google Inc. All Rights Reserved.
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#ifndef CDM_BASE_WV_CONTENT_DECRYPTION_MODULE_H_
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#define CDM_BASE_WV_CONTENT_DECRYPTION_MODULE_H_
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#include <UniquePtr.h>
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#include <utils/RefBase.h>
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#include "lock.h"
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#include "timer.h"
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#include "wv_cdm_types.h"
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namespace wvcdm {
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class CdmClientPropertySet;
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class CdmEngine;
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class WvCdmEventListener;
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class WvContentDecryptionModule : public android::RefBase, public TimerHandler {
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public:
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WvContentDecryptionModule();
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virtual ~WvContentDecryptionModule();
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// Static methods
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static bool IsSupported(const std::string& init_data_type);
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static bool IsCenc(const std::string& init_data_type);
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static bool IsWebm(const std::string& init_data_type);
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// Session related methods
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virtual CdmResponseType OpenSession(const CdmKeySystem& key_system,
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CdmClientPropertySet* property_set,
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const std::string& origin,
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WvCdmEventListener* event_listener,
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CdmSessionId* session_id);
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virtual CdmResponseType CloseSession(const CdmSessionId& session_id);
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virtual bool IsOpenSession(const CdmSessionId& session_id);
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// Construct a valid license request.
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virtual CdmResponseType GenerateKeyRequest(const CdmSessionId& session_id,
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const CdmKeySetId& key_set_id,
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const std::string& init_data_type,
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const CdmInitData& init_data,
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const CdmLicenseType license_type,
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CdmAppParameterMap& app_parameters,
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CdmClientPropertySet* property_set,
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const std::string& origin,
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CdmKeyMessage* key_request,
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CdmKeyRequestType* key_request_type,
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std::string* server_url);
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// Accept license response and extract key info.
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virtual CdmResponseType AddKey(const CdmSessionId& session_id,
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const CdmKeyResponse& key_data,
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CdmKeySetId* key_set_id);
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// Setup keys for offline usage which were retrived in an earlier key request
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virtual CdmResponseType RestoreKey(const CdmSessionId& session_id,
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const CdmKeySetId& key_set_id);
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// Cancel session
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virtual CdmResponseType RemoveKeys(const CdmSessionId& session_id);
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// Query system information
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virtual CdmResponseType QueryStatus(SecurityLevel security_level,
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CdmQueryMap* key_info);
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// Query session information
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virtual CdmResponseType QuerySessionStatus(const CdmSessionId& session_id,
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CdmQueryMap* key_info);
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// Query license information
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virtual CdmResponseType QueryKeyStatus(const CdmSessionId& session_id,
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CdmQueryMap* key_info);
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// Query session control information
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virtual CdmResponseType QueryKeyControlInfo(const CdmSessionId& session_id,
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CdmQueryMap* key_info);
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// Provisioning related methods
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virtual CdmResponseType GetProvisioningRequest(
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CdmCertificateType cert_type,
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const std::string& cert_authority,
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const std::string& origin,
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CdmProvisioningRequest* request,
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std::string* default_url);
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virtual CdmResponseType HandleProvisioningResponse(
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const std::string& origin,
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CdmProvisioningResponse& response,
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std::string* cert,
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std::string* wrapped_key);
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virtual CdmResponseType Unprovision(CdmSecurityLevel level,
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const std::string& origin);
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// Secure stop related methods
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virtual CdmResponseType GetUsageInfo(const std::string& app_id,
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CdmUsageInfo* usage_info);
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virtual CdmResponseType GetUsageInfo(const std::string& app_id,
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const CdmSecureStopId& ssid,
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CdmUsageInfo* usage_info);
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virtual CdmResponseType ReleaseAllUsageInfo(const std::string& app_id);
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virtual CdmResponseType ReleaseUsageInfo(
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const CdmUsageInfoReleaseMessage& message);
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// Accept encrypted buffer and decrypt data.
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// Decryption parameters that need to be specified are
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// is_encrypted, is_secure, key_id, encrypt_buffer, encrypt_length,
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// iv, block_offset, decrypt_buffer, decrypt_buffer_length,
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// decrypt_buffer_offset and subsample_flags
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virtual CdmResponseType Decrypt(const CdmSessionId& session_id,
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bool validate_key_id,
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const CdmDecryptionParameters& parameters);
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virtual void NotifyResolution(const CdmSessionId& session_id, uint32_t width,
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uint32_t height);
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private:
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uint32_t GenerateSessionSharingId();
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// timer related methods to drive policy decisions
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void EnablePolicyTimer();
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void DisablePolicyTimer(bool force);
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void OnTimerEvent();
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static Lock session_sharing_id_generation_lock_;
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Lock policy_timer_lock_;
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Timer policy_timer_;
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// instance variables
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UniquePtr<CdmEngine> cdm_engine_;
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CORE_DISALLOW_COPY_AND_ASSIGN(WvContentDecryptionModule);
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};
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} // namespace wvcdm
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#endif // CDM_BASE_WV_CONTENT_DECRYPTION_MODULE_H_
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