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/*
* Copyright (C) 2014 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.camera;
import android.content.Context;
import android.media.AudioAttributes;
import android.media.AudioManager;
import android.media.SoundPool;
import android.util.SparseIntArray;
import com.android.camera.util.ApiHelper;
/**
* Loads a plays custom sounds. For playing system-standard sounds for various
* camera actions, please refer to {@link SoundClips}.
*/
public class SoundPlayer {
private final Context mAppContext;
private final SoundPool mSoundPool;
/** Keeps a mapping from sound resource ID to sound ID */
private final SparseIntArray mResourceToSoundId = new SparseIntArray();
private boolean mIsReleased = false;
/**
* Construct a new sound player.
*/
public SoundPlayer(Context appContext) {
mAppContext = appContext;
mSoundPool = new SoundPool.Builder()
.setMaxStreams(1)
.setAudioAttributes(new AudioAttributes.Builder()
.setUsage(AudioAttributes.USAGE_ASSISTANCE_SONIFICATION)
.setContentType(AudioAttributes.CONTENT_TYPE_SONIFICATION)
.setFlags(AudioAttributes.FLAG_AUDIBILITY_ENFORCED)
.build())
.build();
}
/**
* Load the sound from a resource.
*/
public void loadSound(int resourceId) {
int soundId = mSoundPool.load(mAppContext, resourceId, 1/* priority */);
mResourceToSoundId.put(resourceId, soundId);
}
/**
* Play the sound with the given resource. The resource has to be loaded
* before it can be played, otherwise an exception will be thrown.
*/
public void play(int resourceId, float volume) {
Integer soundId = mResourceToSoundId.get(resourceId);
if (soundId == null) {
throw new IllegalStateException("Sound not loaded. Must call #loadSound first.");
}
mSoundPool.play(soundId, volume, volume, 0 /* priority */, 0 /* loop */, 1 /* rate */);
}
/**
* Unload the given sound if it's not needed anymore to release memory.
*/
public void unloadSound(int resourceId) {
Integer soundId = mResourceToSoundId.get(resourceId);
if (soundId == null) {
throw new IllegalStateException("Sound not loaded. Must call #loadSound first.");
}
mSoundPool.unload(soundId);
}
/**
* Call this if you don't need the SoundPlayer anymore. All memory will be
* released and the object cannot be re-used.
*/
public void release() {
mIsReleased = true;
mSoundPool.release();
}
public boolean isReleased() {
return mIsReleased;
}
}
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