AudioResamplerPublic.h revision cd04484f4837b8ca0041d118286ab6a98e84fc75 
1/*
2 * Copyright (C) 2014 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17#ifndef ANDROID_AUDIO_RESAMPLER_PUBLIC_H
18#define ANDROID_AUDIO_RESAMPLER_PUBLIC_H
19
20// AUDIO_RESAMPLER_DOWN_RATIO_MAX is the maximum ratio between the original
21// audio sample rate and the target rate when downsampling,
22// as permitted in the audio framework, e.g. AudioTrack and AudioFlinger.
23// In practice, it is not recommended to downsample more than 6:1
24// for best audio quality, even though the audio framework permits a larger
25// downsampling ratio.
26// TODO: replace with an API
27#define AUDIO_RESAMPLER_DOWN_RATIO_MAX 256
28
29#endif // ANDROID_AUDIO_RESAMPLER_PUBLIC_H
30