AudioPlaybackManager.java

/*
 * Copyright (C) 2013 Steelkiwi Development, Julia Zudikova
 * 
 * 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.skd.androidrecording.audio;

import android.content.Context;
import android.media.MediaPlayer;
import android.media.MediaPlayer.OnCompletionListener;
import android.media.MediaPlayer.OnPreparedListener;
import android.view.ViewTreeObserver.OnGlobalLayoutListener;
import android.widget.MediaController;
import android.widget.MediaController.MediaPlayerControl;

import com.skd.androidrecording.video.MediaPlayerManager;
import com.skd.androidrecording.video.PlaybackHandler;
import com.skd.androidrecording.visualizer.VisualizerView;

/*
 * Controls audio playback 
 */

public class AudioPlaybackManager implements OnGlobalLayoutListener, OnPreparedListener, MediaPlayerControl, OnCompletionListener {
	private VisualizerView visualizerView;
	private MediaPlayerManager playerManager;
	private MediaController controller;
	private PlaybackHandler playbackHandler;
	private boolean isPlayerPrepared, isSurfaceCreated;
	
	public AudioPlaybackManager(Context ctx, VisualizerView visualizerView, PlaybackHandler playbackHandler) {
		this.playerManager = new MediaPlayerManager();
		this.playerManager.getPlayer().setOnPreparedListener(this);
		this.playerManager.getPlayer().setOnCompletionListener(this);
	    
		this.visualizerView = visualizerView;
		this.visualizerView.link(this.playerManager.getPlayer());
		this.visualizerView.getViewTreeObserver().addOnGlobalLayoutListener(this);
		
		this.controller = new MediaController(ctx);
        this.controller.setMediaPlayer(this);
        this.controller.setAnchorView(visualizerView);
        
        this.playbackHandler = playbackHandler;
	}
    
	public void setupPlayback(String fileName) {
		playerManager.setupPlayback(fileName);
	}
	
	public void showMediaController() {
		if (!controller.isEnabled()) {
			controller.setEnabled(true);
		}
        controller.show();
	}
	
	public void hideMediaController() {
        controller.hide();
        controller.setEnabled(false);
	}
	
	private void releaseVisualizer() {
		visualizerView.release();
		visualizerView = null;
	}
	
	public void dispose() {
		playerManager.releasePlayer();
		releaseVisualizer();
		controller = null;
		playbackHandler = null;
	}
	
	//visualizer setup callback *****************************************************************
	
	@Override
	public void onGlobalLayout() {
		isSurfaceCreated = true;
    	if (isPlayerPrepared && isSurfaceCreated) {
			playbackHandler.onPreparePlayback();
		}
	}
	
	//media player and controller callbacks *****************************************************
    
	@Override
	public void onPrepared(MediaPlayer mp) {
		isPlayerPrepared = true;
		if (isPlayerPrepared && isSurfaceCreated) {
			playbackHandler.onPreparePlayback();
		}
	}

	@Override
	public void start() {
		playerManager.startPlaying();
	}
	
	@Override
	public void pause() {
		playerManager.pausePlaying();
	}
	
	@Override
	public void seekTo(int arg0) {
		playerManager.seekTo(arg0);
	}
	
	@Override
	public void onCompletion(MediaPlayer mp) {
		playerManager.seekTo(0);
	}

	@Override
	public boolean isPlaying() {
		return playerManager.isPlaying();
	}
	
	@Override
	public int getCurrentPosition() {
		return playerManager.getCurrentPosition();
	}

	@Override
	public int getDuration() {
		return playerManager.getDuration();
	}
	
	@Override
	public boolean canPause() {
		return true;
	}

	@Override
	public boolean canSeekBackward() {
		return true;
	}

	@Override
	public boolean canSeekForward() {
		return true;
	}

	@Override
	public int getAudioSessionId() {
		return 0;
	}

	@Override
	public int getBufferPercentage() {
		return 0;
	}
}