951f08c2da
(This is a merge of https://widevine-internal-review.googlesource.com/9711 from the Widevine CDM repo.) This change updates the CDM's handling of init data types, previously known as MIME types, to comply with the latest version of the EME spec. Following this change, in addition to accepting the deprecated MIME types "video/mp4", "audio/mp4", "video/webm", and "audio/webm", the CDM will accept the new standard: Init data types "cenc" and "webm". Furthermore, this removes the non-PSSH-parsing path from the CDM. All platforms have unified on the CDM being responsible for parsing the concatenated PSSH box list, as outlined in the latest EME spec. As Android has shipped code that expects pre-unwrapped PSSH boxes and must maintain backwards-compatibility, code has been inserted on that platform to detect pre-unwrapped data and re-wrap it with a PSSH header before sending it to the CDM. There are some small changes to unit tests because of this change: 1) The CDM Engine unit test now no longer needs to unwrap the PSSH on any platforms when testing ISO-BMFF. It now pre-caches the unwrapped key ID for use when testing WebM. 2) Several substantially-similar unit tests in the Android code have been rolled into one test. Bug: 13564917 Bug: 13570595 Bug: 9465346 Bug: 13570288 Change-Id: I7f27b16b8503f24a26746b5dce71fb61b6fd1bb2
124 lines
4.5 KiB
C++
124 lines
4.5 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 "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 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(
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const CdmKeySystem& key_system,
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CdmClientPropertySet* property_set,
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CdmSessionId* session_id);
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virtual CdmResponseType CloseSession(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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CdmKeyMessage* key_request,
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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 CancelKeyRequest(const CdmSessionId& session_id);
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// Query system information
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virtual CdmResponseType QueryStatus(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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CdmProvisioningRequest* request,
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std::string* default_url);
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virtual CdmResponseType HandleProvisioningResponse(
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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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// Secure stop related methods
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virtual CdmResponseType GetSecureStops(CdmSecureStops* secure_stops);
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virtual CdmResponseType ReleaseSecureStops(
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const CdmSecureStopReleaseMessage& 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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// Event listener related methods
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virtual bool AttachEventListener(const CdmSessionId& session_id,
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WvCdmEventListener* listener);
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virtual bool DetachEventListener(const CdmSessionId& session_id,
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WvCdmEventListener* listener);
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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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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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