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/*
* Copyright (C) 2011 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.android.ex.variablespeed;
import android.media.AudioManager;
import javax.annotation.concurrent.Immutable;
import javax.annotation.concurrent.NotThreadSafe;
/**
* Encapsulates the parameters required to configure the audio engine.
* <p>
* You should not need to use this class directly, it exists for the benefit of
* this package and the classes contained therein.
*/
@Immutable
/*package*/ final class EngineParameters {
private final int mTargetFrames;
private final int mMaxPlayBufferCount;
private final float mWindowDuration;
private final float mWindowOverlapDuration;
private final float mInitialRate;
private final int mDecodeBufferInitialSize;
private final int mDecodeBufferMaxSize;
private final int mStartPositionMillis;
private final int mAudioStreamType;
public int getTargetFrames() {
return mTargetFrames;
}
public int getMaxPlayBufferCount() {
return mMaxPlayBufferCount;
}
public float getWindowDuration() {
return mWindowDuration;
}
public float getWindowOverlapDuration() {
return mWindowOverlapDuration;
}
public float getInitialRate() {
return mInitialRate;
}
public int getDecodeBufferInitialSize() {
return mDecodeBufferInitialSize;
}
public int getDecodeBufferMaxSize() {
return mDecodeBufferMaxSize;
}
public int getStartPositionMillis() {
return mStartPositionMillis;
}
public int getAudioStreamType() {
return mAudioStreamType;
}
private EngineParameters(int targetFrames, int maxPlayBufferCount, float windowDuration,
float windowOverlapDuration, float initialRate, int decodeBufferInitialSize,
int decodeBufferMaxSize, int startPositionMillis, int audioStreamType) {
mTargetFrames = targetFrames;
mMaxPlayBufferCount = maxPlayBufferCount;
mWindowDuration = windowDuration;
mWindowOverlapDuration = windowOverlapDuration;
mInitialRate = initialRate;
mDecodeBufferInitialSize = decodeBufferInitialSize;
mDecodeBufferMaxSize = decodeBufferMaxSize;
mStartPositionMillis = startPositionMillis;
mAudioStreamType = audioStreamType;
}
/**
* We use the builder pattern to construct an {@link EngineParameters}
* object.
* <p>
* This class is not thread safe, you should confine its use to one thread
* or provide your own synchronization.
*/
@NotThreadSafe
public static class Builder {
private int mTargetFrames = 1000;
private int mMaxPlayBufferCount = 2;
private float mWindowDuration = 0.08f;
private float mWindowOverlapDuration = 0.008f;
private float mInitialRate = 1.0f;
private int mDecodeBufferInitialSize = 5 * 1024;
private int mDecodeBufferMaxSize = 20 * 1024;
private int mStartPositionMillis = 0;
private int mAudioStreamType = AudioManager.STREAM_MUSIC;
public EngineParameters build() {
return new EngineParameters(mTargetFrames, mMaxPlayBufferCount,
mWindowDuration, mWindowOverlapDuration, mInitialRate,
mDecodeBufferInitialSize, mDecodeBufferMaxSize, mStartPositionMillis,
mAudioStreamType);
}
public Builder maxPlayBufferCount(int maxPlayBufferCount) {
mMaxPlayBufferCount = maxPlayBufferCount;
return this;
}
public Builder windowDuration(int windowDuration) {
mWindowDuration = windowDuration;
return this;
}
public Builder windowOverlapDuration(int windowOverlapDuration) {
mWindowOverlapDuration = windowOverlapDuration;
return this;
}
public Builder initialRate(float initialRate) {
mInitialRate = initialRate;
return this;
}
public Builder decodeBufferInitialSize(int decodeBufferInitialSize) {
mDecodeBufferInitialSize = decodeBufferInitialSize;
return this;
}
public Builder decodeBufferMaxSize(int decodeBufferMaxSize) {
mDecodeBufferMaxSize = decodeBufferMaxSize;
return this;
}
public Builder startPositionMillis(int startPositionMillis) {
mStartPositionMillis = startPositionMillis;
return this;
}
public Builder audioStreamType(int audioStreamType) {
mAudioStreamType = audioStreamType;
return this;
}
}
}
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