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content / browser / media / media_license_database.h [blame]
// Copyright 2022 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_MEDIA_LICENSE_DATABASE_H_
#define CONTENT_BROWSER_MEDIA_MEDIA_LICENSE_DATABASE_H_
#include "base/sequence_checker.h"
#include "content/browser/media/media_license_storage_host.h"
#include "media/cdm/cdm_type.h"
#include "sql/database.h"
namespace content {
// Helper class which encapsulates all database logic for storing media license
// data.
//
// This class must be constructed and used on a sequence which allows blocking.
class MediaLicenseDatabase {
public:
// The database will be in-memory if `path` is empty.
explicit MediaLicenseDatabase(const base::FilePath& path);
~MediaLicenseDatabase();
MediaLicenseStorageHost::MediaLicenseStorageHostOpenError OpenFile(
const media::CdmType& cdm_type,
const std::string& file_name);
std::optional<std::vector<uint8_t>> ReadFile(const media::CdmType& cdm_type,
const std::string& file_name);
bool WriteFile(const media::CdmType& cdm_type,
const std::string& file_name,
const std::vector<uint8_t>& data);
bool DeleteFile(const media::CdmType& cdm_type, const std::string& file_name);
bool ClearDatabase();
uint64_t GetDatabaseSize();
private:
// Opens and sets up a database if one is not already set up.
MediaLicenseStorageHost::MediaLicenseStorageHostOpenError OpenDatabase(
bool is_retry = false);
void OnDatabaseError(int error, sql::Statement* stmt);
SEQUENCE_CHECKER(sequence_checker_);
// Empty if the database is in-memory.
const base::FilePath path_;
// A descriptor of the last SQL statement that was executed, used for metrics.
std::optional<std::string> last_operation_;
// Integer of last file size that the CDM sent to be written, used for
// metrics.
std::optional<int> last_write_file_size_;
sql::Database db_ GUARDED_BY_CONTEXT(sequence_checker_);
};
} // namespace content
#endif // CONTENT_BROWSER_MEDIA_MEDIA_LICENSE_DATABASE_H_