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// Copyright 2017 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef CONTENT_BROWSER_MEDIA_CDM_FILE_IMPL_H_
#define CONTENT_BROWSER_MEDIA_CDM_FILE_IMPL_H_
#include <string>
#include <vector>
#include "base/files/file.h"
#include "base/functional/callback_forward.h"
#include "base/memory/weak_ptr.h"
#include "base/threading/sequence_bound.h"
#include "base/threading/thread_checker.h"
#include "base/time/time.h"
#include "media/cdm/cdm_type.h"
#include "media/mojo/mojom/cdm_storage.mojom.h"
#include "mojo/public/cpp/bindings/associated_receiver.h"
#include "third_party/blink/public/common/storage_key/storage_key.h"
namespace content {
class CdmStorageManager;
// This class implements the media::mojom::CdmFile interface.
class CdmFileImpl final : public media::mojom::CdmFile {
public:
// Check whether |name| is valid as a usable file name. Returns true if it is,
// false otherwise.
static bool IsValidName(const std::string& name);
// This "file" is actually just an entry in a custom backend for CDM, uniquely
// identified by a storage key, CDM type, and file name. File operations are
// routed through `manager` which is owned by the storage partition.
// This constructor is used by the CdmStorageManager.
CdmFileImpl(
CdmStorageManager* manager,
const blink::StorageKey& storage_key,
const media::CdmType& cdm_type,
const std::string& file_name,
mojo::PendingAssociatedReceiver<media::mojom::CdmFile> pending_receiver);
CdmFileImpl(const CdmFileImpl&) = delete;
CdmFileImpl& operator=(const CdmFileImpl&) = delete;
~CdmFileImpl() final;
// media::mojom::CdmFile implementation.
void Read(ReadCallback callback) final;
void Write(const std::vector<uint8_t>& data, WriteCallback callback) final;
private:
void DidRead(std::optional<std::vector<uint8_t>> data);
void DidWrite(bool success);
// Deletes |file_name_| asynchronously.
void DeleteFile();
void DidDeleteFile(bool success);
// Report file operation result and time to UMA.
void ReportFileOperationUMA(bool success, const std::string& operation);
void OnReceiverDisconnect();
// This receiver is associated with the CdmStorageManager which creates it.
mojo::AssociatedReceiver<media::mojom::CdmFile> receiver_{this};
const std::string file_name_;
const media::CdmType cdm_type_;
const blink::StorageKey storage_key_;
// Each of these callbacks is only valid while there is an in-progress read
// or write operation, respectively.
ReadCallback read_callback_;
WriteCallback write_callback_;
// Time when the read or write operation starts.
base::TimeTicks start_time_;
// New backing store which CDM file operations are routed through.
// CdmStorageManager owns the lifetime of this object and will outlive it.
const raw_ptr<CdmStorageManager> cdm_storage_manager_ = nullptr;
THREAD_CHECKER(thread_checker_);
base::WeakPtrFactory<CdmFileImpl> weak_factory_{this};
};
} // namespace content
#endif // CONTENT_BROWSER_MEDIA_CDM_FILE_IMPL_H_
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