Implement runtime audio post-processing pipeline. See go/cast_audio.json

chromecast/media/cma/backend/alsa/audio_filter_factory.h

-// Copyright 2016 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 CHROMECAST_MEDIA_CMA_BACKEND_ALSA_AUDIO_FILTER_FACTORY_H_
-#define CHROMECAST_MEDIA_CMA_BACKEND_ALSA_AUDIO_FILTER_FACTORY_H_
-
-#include <memory>
-
-#include "chromecast/media/cma/backend/alsa/audio_filter_interface.h"
-
-namespace chromecast {
-namespace media {
-
-class AudioFilterFactory {
- public:
-  // FilterType specifies the usage of the created filter.
-  enum FilterType {
-    MEDIA_AUDIO_FILTER = 0,
-    TTS_AUDIO_FILTER,
-    COMMUNICATION_AUDIO_FILTER,
-    ALARM_AUDIO_FILTER,
-  };
-
-  // Creates a new AudioFilterInterface.
-  static std::unique_ptr<AudioFilterInterface> MakeAudioFilter(
-      FilterType filter_type);
-};
-
-}  // namespace media
-}  // namespace chromecast
-
-#endif  // CHROMECAST_MEDIA_CMA_BACKEND_ALSA_FILTER_AUDIO_FILTER_FACTORY_H_