chromium/media/base/key_systems.h

// Copyright 2013 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef MEDIA_BASE_KEY_SYSTEMS_H_
#define MEDIA_BASE_KEY_SYSTEMS_H_

#include <stdint.h>

#include <optional>
#include <string>
#include <vector>

#include "base/functional/callback.h"
#include "media/base/eme_constants.h"
#include "media/base/encryption_scheme.h"
#include "media/base/media_export.h"

namespace media {

// Provides an interface for querying registered key systems.
//
// Many of the original static methods are still available, they should be
// migrated into this interface over time (or removed).
class MEDIA_EXPORT KeySystems { … };

// Returns a name for `key_system` for UMA logging. When `use_hw_secure_codecs`
// is specified (non-nullopt), names with robustness will be returned for
// supported key systems.
MEDIA_EXPORT std::string GetKeySystemNameForUMA(
    const std::string& key_system,
    std::optional<bool> use_hw_secure_codecs = std::nullopt);

// Returns an int mapping to `key_system` suitable for UKM reporting. CdmConfig
// is not needed here because we can report CdmConfig fields in UKM directly.
MEDIA_EXPORT int GetKeySystemIntForUKM(const std::string& key_system);

}  // namespace media

#endif  // MEDIA_BASE_KEY_SYSTEMS_H_