chromium/extensions/browser/api/audio/audio_device_id_calculator.h

// 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 EXTENSIONS_BROWSER_API_AUDIO_AUDIO_DEVICE_ID_CALCULATOR_H_
#define EXTENSIONS_BROWSER_API_AUDIO_AUDIO_DEVICE_ID_CALCULATOR_H_

#include <map>
#include <string>

#include "base/memory/raw_ptr.h"

namespace content {
class BrowserContext;
}

namespace extensions {

// Helper class used to translate stable device IDs provided by audio service
// to stable ID values exposable to apps using chrome.audio API.
// Problem with stable device IDs provided by audio service is that they can be
// globally unique for audio devices and thus can be used by apps to identify a
// particular device. |AudioDeviceCalculator| provides stable mapping (saved in
// user prefs) from potentially globally unique ID to an ordinal ID (devices are
// assigned IDs incrementally, as they are added to the mapping) scoped to a
// browser context.
class AudioDeviceIdCalculator { … };

}  // namespace extensions

#endif  // EXTENSIONS_BROWSER_API_AUDIO_AUDIO_DEVICE_ID_CALCULATOR_H_