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// Copyright 2015 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 MEDIA_CDM_CDM_ADAPTER_H_
#define MEDIA_CDM_CDM_ADAPTER_H_
#include <string>
#include <vector>
#include "base/compiler_specific.h"
#include "base/files/file_path.h"
#include "base/macros.h"
#include "base/memory/ref_counted.h"
#include "base/memory/scoped_ptr.h"
#include "base/memory/weak_ptr.h"
#include "base/scoped_native_library.h"
#include "base/threading/thread.h"
#include "media/base/cdm_config.h"
#include "media/base/cdm_factory.h"
#include "media/base/cdm_promise_adapter.h"
#include "media/base/media_export.h"
#include "media/base/media_keys.h"
#include "media/cdm/api/content_decryption_module.h"
namespace media {
class CdmWrapper;
class MEDIA_EXPORT CdmAdapter : public MediaKeys,
NON_EXPORTED_BASE(public cdm::Host_7),
NON_EXPORTED_BASE(public cdm::Host_8) {
public:
// Create the CDM using |cdm_path| and initialize it using |key_system| and
// |cdm_config|. Callbacks will be used for events generated by the CDM.
// |cdm_created_cb| will be called when the CDM is loaded and initialized.
static void Create(
const std::string& key_system,
const base::FilePath& cdm_path,
const CdmConfig& cdm_config,
const SessionMessageCB& session_message_cb,
const SessionClosedCB& session_closed_cb,
const LegacySessionErrorCB& legacy_session_error_cb,
const SessionKeysChangeCB& session_keys_change_cb,
const SessionExpirationUpdateCB& session_expiration_update_cb,
const CdmCreatedCB& cdm_created_cb);
// MediaKeys implementation.
void SetServerCertificate(const std::vector<uint8_t>& certificate,
scoped_ptr<SimpleCdmPromise> promise) override;
void CreateSessionAndGenerateRequest(
SessionType session_type,
EmeInitDataType init_data_type,
const std::vector<uint8_t>& init_data,
scoped_ptr<NewSessionCdmPromise> promise) override;
void LoadSession(SessionType session_type,
const std::string& session_id,
scoped_ptr<NewSessionCdmPromise> promise) override;
void UpdateSession(const std::string& session_id,
const std::vector<uint8_t>& response,
scoped_ptr<SimpleCdmPromise> promise) override;
void CloseSession(const std::string& session_id,
scoped_ptr<SimpleCdmPromise> promise) override;
void RemoveSession(const std::string& session_id,
scoped_ptr<SimpleCdmPromise> promise) override;
CdmContext* GetCdmContext() override;
// cdm::Host_7 and cdm::Host_8 implementation.
cdm::Buffer* Allocate(uint32_t capacity) override;
void SetTimer(int64_t delay_ms, void* context) override;
cdm::Time GetCurrentWallTime() override;
void OnResolveNewSessionPromise(uint32_t promise_id,
const char* session_id,
uint32_t session_id_size) override;
void OnResolvePromise(uint32_t promise_id) override;
void OnRejectPromise(uint32_t promise_id,
cdm::Error error,
uint32_t system_code,
const char* error_message,
uint32_t error_message_size) override;
void OnSessionMessage(const char* session_id,
uint32_t session_id_size,
cdm::MessageType message_type,
const char* message,
uint32_t message_size,
const char* legacy_destination_url,
uint32_t legacy_destination_url_size) override;
void OnSessionKeysChange(const char* session_id,
uint32_t session_id_size,
bool has_additional_usable_key,
const cdm::KeyInformation* keys_info,
uint32_t keys_info_count) override;
void OnExpirationChange(const char* session_id,
uint32_t session_id_size,
cdm::Time new_expiry_time) override;
void OnSessionClosed(const char* session_id,
uint32_t session_id_size) override;
void OnLegacySessionError(const char* session_id,
uint32_t session_id_size,
cdm::Error error,
uint32_t system_code,
const char* error_message,
uint32_t error_message_size) override;
void SendPlatformChallenge(const char* service_id,
uint32_t service_id_size,
const char* challenge,
uint32_t challenge_size) override;
void EnableOutputProtection(uint32_t desired_protection_mask) override;
void QueryOutputProtectionStatus() override;
void OnDeferredInitializationDone(cdm::StreamType stream_type,
cdm::Status decoder_status) override;
cdm::FileIO* CreateFileIO(cdm::FileIOClient* client) override;
private:
CdmAdapter(const std::string& key_system,
const CdmConfig& cdm_config,
const SessionMessageCB& session_message_cb,
const SessionClosedCB& session_closed_cb,
const LegacySessionErrorCB& legacy_session_error_cb,
const SessionKeysChangeCB& session_keys_change_cb,
const SessionExpirationUpdateCB& session_expiration_update_cb);
~CdmAdapter() final;
// Load the CDM using |cdm_path| and initialize it. |promise| is resolved if
// the CDM is successfully loaded and initialized, rejected otherwise.
void Initialize(const base::FilePath& cdm_path,
scoped_ptr<media::SimpleCdmPromise> promise);
// Create an instance of the |key_system| CDM contained in |cdm_path|.
// Caller owns the returned pointer. On error (unable to load, does not
// support |key_system|, does not support an supported interface, etc.)
// NULL will be returned.
CdmWrapper* CreateCdmInstance(const std::string& key_system,
const base::FilePath& cdm_path);
// Helper for SetTimer().
void TimerExpired(void* context);
// Keep a reference to the CDM.
base::ScopedNativeLibrary library_;
// Used to keep track of promises while the CDM is processing the request.
CdmPromiseAdapter cdm_promise_adapter_;
scoped_ptr<CdmWrapper> cdm_;
std::string key_system_;
CdmConfig cdm_config_;
// Callbacks for firing session events.
SessionMessageCB session_message_cb_;
SessionClosedCB session_closed_cb_;
LegacySessionErrorCB legacy_session_error_cb_;
SessionKeysChangeCB session_keys_change_cb_;
SessionExpirationUpdateCB session_expiration_update_cb_;
scoped_refptr<base::SingleThreadTaskRunner> task_runner_;
// NOTE: Weak pointers must be invalidated before all other member variables.
base::WeakPtrFactory<CdmAdapter> weak_factory_;
DISALLOW_COPY_AND_ASSIGN(CdmAdapter);
};
} // namespace media
#endif // MEDIA_CDM_CDM_ADAPTER_H_
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