modules/audio_mixer/output_rate_calculator.h

/*
 *  Copyright (c) 2016 The WebRTC project authors. All Rights Reserved.
 *
 *  Use of this source code is governed by a BSD-style license
 *  that can be found in the LICENSE file in the root of the source
 *  tree. An additional intellectual property rights grant can be found
 *  in the file PATENTS.  All contributing project authors may
 *  be found in the AUTHORS file in the root of the source tree.
 */

#ifndef MODULES_AUDIO_MIXER_OUTPUT_RATE_CALCULATOR_H_
#define MODULES_AUDIO_MIXER_OUTPUT_RATE_CALCULATOR_H_

#include <vector>

#include "api/array_view.h"

namespace webrtc {

// Decides the sample rate of a mixing iteration given the preferred
// sample rates of the sources.
class OutputRateCalculator {
 public:
  virtual int CalculateOutputRateFromRange(
      rtc::ArrayView<const int> preferred_sample_rates) {
    // TODO(olka): Temporary workaround to reslove client dependencies.
    std::vector<int> sample_rates(preferred_sample_rates.cbegin(),
                                  preferred_sample_rates.cend());
    return CalculateOutputRate(sample_rates);
  }

  // TODO(olka) to be removed as soon as the clients are switched to
  // CalculateOutputRateFromRange()
  virtual int CalculateOutputRate(
      const std::vector<int>& preferred_sample_rates) {
    return CalculateOutputRateFromRange(preferred_sample_rates);
  }

  virtual ~OutputRateCalculator() {}
};

}  // namespace webrtc

#endif  // MODULES_AUDIO_MIXER_OUTPUT_RATE_CALCULATOR_H_