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