1a8aa0dd05
Builds libwvmdrmengine.so, which is loaded by the new MediaDrm APIs to support playback of Widevine/CENC protected content. Change-Id: I6f57dd37083dfd96c402cb9dd137c7d74edc8f1c
124 lines
4.6 KiB
C++
124 lines
4.6 KiB
C++
// Copyright 2013 Google Inc. All Rights Reserved.
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#ifndef CDM_BASE_CDM_ENGINE_H_
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#define CDM_BASE_CDM_ENGINE_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 CdmSession;
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class WvCdmEventListener;
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typedef std::map<CdmSessionId, CdmSession*> CdmSessionMap;
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class CdmEngine : public TimerHandler {
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public:
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CdmEngine() {}
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~CdmEngine();
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// Session related methods
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CdmResponseType OpenSession(const CdmKeySystem& key_system,
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CdmSessionId* session_id);
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CdmResponseType CloseSession(CdmSessionId& session_id);
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// License related methods
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// Construct a valid license request
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CdmResponseType GenerateKeyRequest(const CdmSessionId& session_id,
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bool is_key_system_present,
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const CdmKeySystem& key_system,
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const CdmInitData& init_data,
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const CdmLicenseType license_type,
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CdmNameValueMap& app_parameters,
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CdmKeyMessage* key_request);
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// Accept license response and extract key info.
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CdmResponseType AddKey(const CdmSessionId& session_id,
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bool is_key_system_init_data_present,
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const CdmKeySystem& key_system,
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const CdmInitData& init_data,
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const CdmKeyResponse& key_data);
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// Cancel session and unload keys.
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CdmResponseType CancelKeyRequest(const CdmSessionId& session_id,
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bool is_key_system_present,
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const CdmKeySystem& key_system);
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// Construct valid renewal request for the current session keys.
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CdmResponseType GenerateRenewalRequest(const CdmSessionId& session_id,
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bool is_key_system_init_data_present,
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const CdmKeySystem& key_system,
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const CdmInitData& init_data,
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CdmKeyMessage* key_request);
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// Accept renewal response and update key info.
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CdmResponseType RenewKey(const CdmSessionId& session_id,
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bool is_key_system_init_data_present,
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const CdmKeySystem& key_system,
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const CdmInitData& init_data,
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const CdmKeyResponse& key_data);
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// Query license information
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CdmResponseType QueryKeyStatus(const CdmSessionId& session_id,
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CdmNameValueMap* key_info);
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// Provisioning related methods
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CdmResponseType GetProvisioningRequest(CdmProvisioningRequest* request,
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std::string* default_url);
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CdmResponseType HandleProvisioningResponse(CdmProvisioningResponse& response);
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// Secure stop related methods
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CdmResponseType GetSecureStops(CdmSecureStops* secure_stops);
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CdmResponseType ReleaseSecureStops(const CdmSecureStopReleaseMessage& message);
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// Decryption and key related methods
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// Accept encrypted buffer and return decrypted data.
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CdmResponseType Decrypt(const CdmSessionId& session_id,
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bool is_encrypted,
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const KeyId& key_id,
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const uint8_t* encrypted_buffer,
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size_t encrypted_size,
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const std::vector<uint8_t>& iv,
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size_t block_offset,
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void* decrypted_buffer);
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// Is the key known to any session?
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bool IsKeyValid(const KeyId& key_id);
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// Event listener related methods
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bool AttachEventListener(CdmSessionId& session_id,
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WvCdmEventListener* listener);
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bool DetachEventListener(CdmSessionId& session_id,
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WvCdmEventListener* listener);
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private:
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// private methods
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bool ValidateKeySystem(const CdmKeySystem& key_system);
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// Cancel all sessions
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bool CancelSessions();
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// Parse a blob of multiple concatenated PSSH atoms to extract the first
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// widevine pssh
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// TODO(gmorgan): This should be done by the user of this class.
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bool ExtractWidevinePssh(const CdmInitData& init_data,
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CdmInitData* output);
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// timer related methods to drive policy decisions
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void EnablePolicyTimer();
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void DisablePolicyTimer();
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virtual void OnTimerEvent();
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// instance variables
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CdmSessionMap sessions_;
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// policy timer
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Timer policy_timer_;
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CORE_DISALLOW_COPY_AND_ASSIGN(CdmEngine);
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};
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} // namespace wvcdm
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#endif // CDM_BASE_CDM_ENGINE_H_
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