audio_processing_module.h

/*
 * Copyright 2025 LiveKit
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
 
#pragma once
 
#include <cstdint>
 
#include "livekit/audio_frame.h"
#include "livekit/ffi_handle.h"
#include "livekit/visibility.h"
 
namespace livekit {
 
class LIVEKIT_API AudioProcessingModule {
public:
  struct Options {
    bool echo_cancellation = false;
 
    bool noise_suppression = false;
 
    bool high_pass_filter = false;
 
    bool auto_gain_control = false;
 
    Options() = default;
  };
 
  AudioProcessingModule();
 
  explicit AudioProcessingModule(const Options& options);
 
  virtual ~AudioProcessingModule() = default;
 
  // Non-copyable
  AudioProcessingModule(const AudioProcessingModule&) = delete;
  AudioProcessingModule& operator=(const AudioProcessingModule&) = delete;
 
  // Movable
  AudioProcessingModule(AudioProcessingModule&&) noexcept = default;
  AudioProcessingModule& operator=(AudioProcessingModule&&) noexcept = default;
 
  void processStream(AudioFrame& frame);
 
  void processReverseStream(AudioFrame& frame);
 
  void setStreamDelayMs(int delay_ms);
 
private:
  bool valid() const noexcept { return handle_.valid(); }
 
  std::uint64_t ffiHandleId() const noexcept { return static_cast<std::uint64_t>(handle_.get()); }
 
  FfiHandle handle_;
};
 
} // namespace livekit