1cd04484f4837b8ca0041d118286ab6a98e84fc75Andy Hung/* 2cd04484f4837b8ca0041d118286ab6a98e84fc75Andy Hung * Copyright (C) 2014 The Android Open Source Project 3cd04484f4837b8ca0041d118286ab6a98e84fc75Andy Hung * 4cd04484f4837b8ca0041d118286ab6a98e84fc75Andy Hung * Licensed under the Apache License, Version 2.0 (the "License"); 5cd04484f4837b8ca0041d118286ab6a98e84fc75Andy Hung * you may not use this file except in compliance with the License. 6cd04484f4837b8ca0041d118286ab6a98e84fc75Andy Hung * You may obtain a copy of the License at 7cd04484f4837b8ca0041d118286ab6a98e84fc75Andy Hung * 8cd04484f4837b8ca0041d118286ab6a98e84fc75Andy Hung * http://www.apache.org/licenses/LICENSE-2.0 9cd04484f4837b8ca0041d118286ab6a98e84fc75Andy Hung * 10cd04484f4837b8ca0041d118286ab6a98e84fc75Andy Hung * Unless required by applicable law or agreed to in writing, software 11cd04484f4837b8ca0041d118286ab6a98e84fc75Andy Hung * distributed under the License is distributed on an "AS IS" BASIS, 12cd04484f4837b8ca0041d118286ab6a98e84fc75Andy Hung * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13cd04484f4837b8ca0041d118286ab6a98e84fc75Andy Hung * See the License for the specific language governing permissions and 14cd04484f4837b8ca0041d118286ab6a98e84fc75Andy Hung * limitations under the License. 15cd04484f4837b8ca0041d118286ab6a98e84fc75Andy Hung */ 16cd04484f4837b8ca0041d118286ab6a98e84fc75Andy Hung 17cd04484f4837b8ca0041d118286ab6a98e84fc75Andy Hung#ifndef ANDROID_AUDIO_RESAMPLER_PUBLIC_H 18cd04484f4837b8ca0041d118286ab6a98e84fc75Andy Hung#define ANDROID_AUDIO_RESAMPLER_PUBLIC_H 19cd04484f4837b8ca0041d118286ab6a98e84fc75Andy Hung 20cd04484f4837b8ca0041d118286ab6a98e84fc75Andy Hung// AUDIO_RESAMPLER_DOWN_RATIO_MAX is the maximum ratio between the original 21cd04484f4837b8ca0041d118286ab6a98e84fc75Andy Hung// audio sample rate and the target rate when downsampling, 22cd04484f4837b8ca0041d118286ab6a98e84fc75Andy Hung// as permitted in the audio framework, e.g. AudioTrack and AudioFlinger. 23cd04484f4837b8ca0041d118286ab6a98e84fc75Andy Hung// In practice, it is not recommended to downsample more than 6:1 24cd04484f4837b8ca0041d118286ab6a98e84fc75Andy Hung// for best audio quality, even though the audio framework permits a larger 25cd04484f4837b8ca0041d118286ab6a98e84fc75Andy Hung// downsampling ratio. 26cd04484f4837b8ca0041d118286ab6a98e84fc75Andy Hung// TODO: replace with an API 27cd04484f4837b8ca0041d118286ab6a98e84fc75Andy Hung#define AUDIO_RESAMPLER_DOWN_RATIO_MAX 256 28cd04484f4837b8ca0041d118286ab6a98e84fc75Andy Hung 29cd04484f4837b8ca0041d118286ab6a98e84fc75Andy Hung#endif // ANDROID_AUDIO_RESAMPLER_PUBLIC_H 30