1 /* 2 * Copyright (c) 2016 The WebRTC project authors. All Rights Reserved. 3 * 4 * Use of this source code is governed by a BSD-style license 5 * that can be found in the LICENSE file in the root of the source 6 * tree. An additional intellectual property rights grant can be found 7 * in the file PATENTS. All contributing project authors may 8 * be found in the AUTHORS file in the root of the source tree. 9 */ 10 11 #ifndef MODULES_AUDIO_MIXER_DEFAULT_OUTPUT_RATE_CALCULATOR_H_ 12 #define MODULES_AUDIO_MIXER_DEFAULT_OUTPUT_RATE_CALCULATOR_H_ 13 14 #include <vector> 15 16 #include "api/array_view.h" 17 #include "modules/audio_mixer/output_rate_calculator.h" 18 19 namespace webrtc { 20 21 class DefaultOutputRateCalculator : public OutputRateCalculator { 22 public: 23 static const int kDefaultFrequency = 48000; 24 25 // Produces the least native rate greater or equal to the preferred 26 // sample rates. A native rate is one in 27 // AudioProcessing::NativeRate. If `preferred_sample_rates` is 28 // empty, returns `kDefaultFrequency`. 29 int CalculateOutputRateFromRange( 30 rtc::ArrayView<const int> preferred_sample_rates) override; ~DefaultOutputRateCalculator()31 ~DefaultOutputRateCalculator() override {} 32 }; 33 34 } // namespace webrtc 35 36 #endif // MODULES_AUDIO_MIXER_DEFAULT_OUTPUT_RATE_CALCULATOR_H_ 37