学习笔记之Vitamio的MediaPlayer

其他 2018-05-07 10:27:28 阅读次数: 3

Vitamio框架之MediaPlayer

由于项目中中需要用到在线视频播放功能，而Android自带的mediaplayer类支持的格式太少，而vitamio框架性能强大支持的格式众多，支持在线播放。

使用vitamio框架的MediaPlayer这个类进行播放网络视频，在使用的过程中遇到一些问题，MediaPlayer的setOnInfoListener函数用来注册信息监听器，主要监听的是缓冲开始，缓冲结束，下载速度发生变化之类的事件，我遇到的问题是视频播放或者拖动了seekbar后开始缓冲，结果是一直缓冲到视频结束才会监听到缓冲结束事件，在这期间注册的setOnBufferingUpdateListener监听器监听到的数据也是无效的，甚至还出现123这样的百分比，上网搜索了一两个小时没有什么收获，于是只有看vitamio框架的VideoView类，他继承了surfaceview，实际上就是对surfaceview和MediaPlayer进行了封装，用它来进行播放，缓冲的数据是正常。于是开始阅读源码，发现他跟我之前写的有一个地方不一样，VideoView在准备完成之后进行设置surfaceview的布局，没有开始播放视频。而我的是设置完后开始播放视频，于是我试着注释掉start()；缓冲终于正常了。

缓冲有问题的代码

/*
 * Copyright (C) 2013 yixia.com
 *
 * 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 io.vov.vitamio.demo;

import java.io.File;

import android.app.Activity;
import android.app.ProgressDialog;
import android.graphics.PixelFormat;
import android.media.AudioManager;
import android.net.Uri;
import android.os.Bundle;
import android.os.Environment;
import android.util.Log;
import android.view.SurfaceHolder;
import android.view.SurfaceView;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup;
import android.widget.ProgressBar;
import android.widget.TextView;
import android.widget.Toast;
import io.vov.vitamio.LibsChecker;
import io.vov.vitamio.MediaPlayer;
import io.vov.vitamio.MediaPlayer.OnBufferingUpdateListener;
import io.vov.vitamio.MediaPlayer.OnCompletionListener;
import io.vov.vitamio.MediaPlayer.OnInfoListener;
import io.vov.vitamio.MediaPlayer.OnPreparedListener;
import io.vov.vitamio.MediaPlayer.OnVideoSizeChangedListener;
import io.vov.vitamio.widget.MediaController;
import io.vov.vitamio.widget.MediaController.MediaPlayerControl;

public class MediaPlayerDemo_Video extends Activity implements  OnCompletionListener, OnPreparedListener, OnVideoSizeChangedListener, SurfaceHolder.Callback {

    private static final String TAG = "MediaPlayerDemo";
    private int mVideoWidth;
    private int mVideoHeight;
    private MediaPlayer mMediaPlayer;
    private SurfaceView mPreview;
    private SurfaceHolder holder;
    private String path;
    private Bundle extras;
    int downloadSize=0;
    private static final String MEDIA = "media";
    private static final int LOCAL_AUDIO = 1;
    private static final int STREAM_AUDIO = 2;
    private static final int RESOURCES_AUDIO = 3;
    private static final int LOCAL_VIDEO = 4;
    private static final int STREAM_VIDEO = 5;
    private boolean mIsVideoSizeKnown = false;
    private boolean mIsVideoReadyToBePlayed = false;
    MediaController mc;
    ProgressBar pb;
    TextView download_rate,rate; 
    /**
     * 
     * Called when the activity is first created.
     */
    @Override
    public void onCreate(Bundle icicle) {
        super.onCreate(icicle);
        if (!LibsChecker.checkVitamioLibs(this))
            return;
        setContentView(R.layout.mediaplayer_2);
        mPreview = (SurfaceView) findViewById(R.id.surface);
        mPreview.requestFocus();
        holder = mPreview.getHolder();
        holder.addCallback(this);
        holder.setFormat(PixelFormat.RGBA_8888); 
        extras = getIntent().getExtras();
        mc=new MediaController(this);

        download_rate=(TextView)findViewById(R.id.rate);
        rate=(TextView)findViewById(R.id.percent);
        pb=(ProgressBar) findViewById(R.id.progressbar);
    }

    private void playVideo(Integer Media) {
        doCleanUp();
        try {

            switch (Media) {
            case LOCAL_VIDEO:
            case STREAM_VIDEO:
                path = "http://211.144.85.251/tangbohu.mp4";
                path="http://www.modrails.com/videos/passenger_nginx.mov";
            // Create a new media player and set the listeners
            mMediaPlayer = new MediaPlayer(this);
            mMediaPlayer.setDataSource(this,Uri.parse(path));
            mMediaPlayer.setDisplay(holder);
            mMediaPlayer.prepareAsync();
            mMediaPlayer.setOnPreparedListener(this);
            mMediaPlayer.setOnVideoSizeChangedListener(this);
            setVolumeControlStream(AudioManager.STREAM_MUSIC);
            mMediaPlayer.setVideoQuality(MediaPlayer.VIDEOQUALITY_LOW);
            mMediaPlayer.setOnBufferingUpdateListener(new OnBufferingUpdateListener() {             
                @Override
                public void onBufferingUpdate(MediaPlayer mp, int percent) {
                    Log.i(TAG,"已经缓冲："+percent+"%");
                    rate.setText(percent+"%");
                }
            });
            mMediaPlayer.setOnInfoListener(new OnInfoListener() {

                @Override
                public boolean onInfo(MediaPlayer mp, int what, int extra) {
                    switch(what)
                    {
                    case MediaPlayer.MEDIA_INFO_DOWNLOAD_RATE_CHANGED://(extra为下载速率，单位是kb/s)
                        Log.i(TAG,"下载的速率："+extra);
                        download_rate.setText(extra+"kb/s");
                        downloadSize+=extra;
                        return true;
                    case MediaPlayer.MEDIA_INFO_BUFFERING_END://从开始缓冲的地方一直缓冲到填满缓冲区为止
                        Log.i(TAG,"缓冲结束");
                        pb.setVisibility(ViewGroup.GONE);
                        rate.setVisibility(ViewGroup.GONE);
                        download_rate.setVisibility(ViewGroup.GONE);
                        mMediaPlayer.start();
                        return true;
                    case MediaPlayer.MEDIA_INFO_BUFFERING_START://从开始播放的位置开始缓冲
                        Log.i(TAG,"缓冲开始");
                        downloadSize=0;
                        if(mMediaPlayer.isPlaying())
                            mMediaPlayer.pause();
                        pb.setVisibility(ViewGroup.VISIBLE);
                        rate.setVisibility(ViewGroup.VISIBLE);
                        download_rate.setVisibility(ViewGroup.VISIBLE);
                        return true;
                    }
                    return false;
                }
            });     
            mc.setAnchorView(mPreview);
            mc.setMediaPlayer(new MediaPlayerControl() {

                @Override
                public void start() {
                    if(mMediaPlayer.isPlaying())
                        mMediaPlayer.stop();
                    mMediaPlayer.start();
                }

                @Override
                public void seekTo(long pos) {
                    mMediaPlayer.seekTo(pos);
                }

                @Override
                public void pause() {
                    mMediaPlayer.pause();
                }

                @Override
                public boolean isPlaying() {
                    // TODO Auto-generated method stub
                    return mMediaPlayer.isPlaying();
                }

                @Override
                public long getDuration() {
                    // TODO Auto-generated method stub
                    return mMediaPlayer.getDuration();
                }

                @Override
                public long getCurrentPosition() {
                    // TODO Auto-generated method stub
                    return mMediaPlayer.getCurrentPosition();
                }

                @Override
                public int getBufferPercentage() {
                    // TODO Auto-generated method stub
                    return mMediaPlayer.getBufferProgress();
                }
            });
        } }catch (Exception e) {
            Log.e(TAG, "error: " + e.getMessage(), e);
        }
    }

    public void onCompletion(MediaPlayer arg0) {
        Log.d(TAG, "onCompletion called");
    }

    public void onVideoSizeChanged(MediaPlayer mp, int width, int height) {
        Log.v(TAG, "onVideoSizeChanged called");
        if (width == 0 || height == 0) {
            Log.e(TAG, "invalid video width(" + width + ") or height(" + height + ")");
            return;
        }
        Log.i(TAG,"width:"+width+"height:"+height);
        mIsVideoSizeKnown = true;
        mVideoWidth = width;
        mVideoHeight = height;
        if (mIsVideoReadyToBePlayed && mIsVideoSizeKnown) {
            startVideoPlayback();
        }
    }

    public void onPrepared(MediaPlayer mediaplayer) {
        Log.i(TAG, "onPrepared called");    
        mIsVideoReadyToBePlayed = true;
        if (mIsVideoReadyToBePlayed && mIsVideoSizeKnown) {
            startVideoPlayback();
        }
    }

    public void surfaceChanged(SurfaceHolder surfaceholder, int i, int j, int k) {
        Log.d(TAG, "surfaceChanged called");

    }

    public void surfaceDestroyed(SurfaceHolder surfaceholder) {
        Log.d(TAG, "surfaceDestroyed called");
    }

    public void surfaceCreated(SurfaceHolder holder) {
        Log.d(TAG, "surfaceCreated called");
        playVideo(extras.getInt(MEDIA));
        mPreview.setOnClickListener(new OnClickListener() {

            @Override
            public void onClick(View v) {
                mc.show();
            }
        });
    }

    @Override
    protected void onPause() {
        super.onPause();
        releaseMediaPlayer();
        doCleanUp();
    }

    @Override
    protected void onDestroy() {
        super.onDestroy();
        releaseMediaPlayer();
        doCleanUp();
    }

    private void releaseMediaPlayer() {
        if (mMediaPlayer != null) {
            mMediaPlayer.release();
            mMediaPlayer = null;
        }
    }

    private void doCleanUp() {
        mVideoWidth = 0;
        mVideoHeight = 0;
        mIsVideoReadyToBePlayed = false;
        mIsVideoSizeKnown = false;
    }

    private void startVideoPlayback() {
        Log.v(TAG, "startVideoPlayback");
        holder.setFixedSize(mVideoWidth, mVideoHeight);
        mMediaPlayer.start();
    }


}

缓冲正常的代码

/*
 * Copyright (C) 2013 yixia.com
 *
 * 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 io.vov.vitamio.demo;

import java.io.File;

import android.app.Activity;
import android.app.ProgressDialog;
import android.graphics.PixelFormat;
import android.media.AudioManager;
import android.net.Uri;
import android.os.Bundle;
import android.os.Environment;
import android.util.Log;
import android.view.SurfaceHolder;
import android.view.SurfaceView;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup;
import android.widget.ProgressBar;
import android.widget.TextView;
import android.widget.Toast;
import io.vov.vitamio.LibsChecker;
import io.vov.vitamio.MediaPlayer;
import io.vov.vitamio.MediaPlayer.OnBufferingUpdateListener;
import io.vov.vitamio.MediaPlayer.OnCompletionListener;
import io.vov.vitamio.MediaPlayer.OnInfoListener;
import io.vov.vitamio.MediaPlayer.OnPreparedListener;
import io.vov.vitamio.MediaPlayer.OnVideoSizeChangedListener;
import io.vov.vitamio.widget.MediaController;
import io.vov.vitamio.widget.MediaController.MediaPlayerControl;

public class MediaPlayerDemo_Video extends Activity implements  OnCompletionListener, OnPreparedListener, OnVideoSizeChangedListener, SurfaceHolder.Callback {

    private static final String TAG = "MediaPlayerDemo";
    private int mVideoWidth;
    private int mVideoHeight;
    private MediaPlayer mMediaPlayer;
    private SurfaceView mPreview;
    private SurfaceHolder holder;
    private String path;
    private Bundle extras;
    int downloadSize=0;
    private static final String MEDIA = "media";
    private static final int LOCAL_AUDIO = 1;
    private static final int STREAM_AUDIO = 2;
    private static final int RESOURCES_AUDIO = 3;
    private static final int LOCAL_VIDEO = 4;
    private static final int STREAM_VIDEO = 5;
    private boolean mIsVideoSizeKnown = false;
    private boolean mIsVideoReadyToBePlayed = false;
    MediaController mc;
    ProgressBar pb;
    TextView download_rate,rate; 
    /**
     * 
     * Called when the activity is first created.
     */
    @Override
    public void onCreate(Bundle icicle) {
        super.onCreate(icicle);
        if (!LibsChecker.checkVitamioLibs(this))
            return;
        setContentView(R.layout.mediaplayer_2);
        mPreview = (SurfaceView) findViewById(R.id.surface);
        mPreview.requestFocus();
        holder = mPreview.getHolder();
        holder.addCallback(this);
        holder.setFormat(PixelFormat.RGBA_8888); 
        extras = getIntent().getExtras();
        mc=new MediaController(this);

        download_rate=(TextView)findViewById(R.id.rate);
        rate=(TextView)findViewById(R.id.percent);
        pb=(ProgressBar) findViewById(R.id.progressbar);
    }

    private void playVideo(Integer Media) {
        doCleanUp();
        try {

            switch (Media) {
            case LOCAL_VIDEO:
            case STREAM_VIDEO:
                path = "http://211.144.85.251/tangbohu.mp4";
                path="http://www.modrails.com/videos/passenger_nginx.mov";
            // Create a new media player and set the listeners
            mMediaPlayer = new MediaPlayer(this);
            mMediaPlayer.setDataSource(this,Uri.parse(path));
            mMediaPlayer.setDisplay(holder);
            mMediaPlayer.prepareAsync();
            mMediaPlayer.setOnPreparedListener(this);
            mMediaPlayer.setOnVideoSizeChangedListener(this);
            setVolumeControlStream(AudioManager.STREAM_MUSIC);
            mMediaPlayer.setVideoQuality(MediaPlayer.VIDEOQUALITY_LOW);
            mMediaPlayer.setOnBufferingUpdateListener(new OnBufferingUpdateListener() {             
                @Override
                public void onBufferingUpdate(MediaPlayer mp, int percent) {
                    Log.i(TAG,"已经缓冲："+percent+"%");
                    rate.setText(percent+"%");
                }
            });
            mMediaPlayer.setOnInfoListener(new OnInfoListener() {

                @Override
                public boolean onInfo(MediaPlayer mp, int what, int extra) {
                    switch(what)
                    {
                    case MediaPlayer.MEDIA_INFO_DOWNLOAD_RATE_CHANGED://(extra为下载速率，单位是kb/s)
                        Log.i(TAG,"下载的速率："+extra);
                        download_rate.setText(extra+"kb/s");
                        downloadSize+=extra;
                        return true;
                    case MediaPlayer.MEDIA_INFO_BUFFERING_END://从开始缓冲的地方一直缓冲到填满缓冲区为止
                        Log.i(TAG,"缓冲结束");
                        pb.setVisibility(ViewGroup.GONE);
                        rate.setVisibility(ViewGroup.GONE);
                        download_rate.setVisibility(ViewGroup.GONE);
                        mMediaPlayer.start();
                        return true;
                    case MediaPlayer.MEDIA_INFO_BUFFERING_START://从开始播放的位置开始缓冲
                        Log.i(TAG,"缓冲开始");
                        downloadSize=0;
                        if(mMediaPlayer.isPlaying())
                            mMediaPlayer.pause();
                        pb.setVisibility(ViewGroup.VISIBLE);
                        rate.setVisibility(ViewGroup.VISIBLE);
                        download_rate.setVisibility(ViewGroup.VISIBLE);
                        return true;
                    }
                    return false;
                }
            });     
            mc.setAnchorView(mPreview);
            mc.setMediaPlayer(new MediaPlayerControl() {

                @Override
                public void start() {
                    if(mMediaPlayer.isPlaying())
                        mMediaPlayer.stop();
                    mMediaPlayer.start();
                }

                @Override
                public void seekTo(long pos) {
                    mMediaPlayer.seekTo(pos);
                }

                @Override
                public void pause() {
                    mMediaPlayer.pause();
                }

                @Override
                public boolean isPlaying() {
                    // TODO Auto-generated method stub
                    return mMediaPlayer.isPlaying();
                }

                @Override
                public long getDuration() {
                    // TODO Auto-generated method stub
                    return mMediaPlayer.getDuration();
                }

                @Override
                public long getCurrentPosition() {
                    // TODO Auto-generated method stub
                    return mMediaPlayer.getCurrentPosition();
                }

                @Override
                public int getBufferPercentage() {
                    // TODO Auto-generated method stub
                    return mMediaPlayer.getBufferProgress();
                }
            });
        } }catch (Exception e) {
            Log.e(TAG, "error: " + e.getMessage(), e);
        }
    }

    public void onCompletion(MediaPlayer arg0) {
        Log.d(TAG, "onCompletion called");
    }

    public void onVideoSizeChanged(MediaPlayer mp, int width, int height) {
        Log.v(TAG, "onVideoSizeChanged called");
        if (width == 0 || height == 0) {
            Log.e(TAG, "invalid video width(" + width + ") or height(" + height + ")");
            return;
        }
        Log.i(TAG,"width:"+width+"height:"+height);
        mIsVideoSizeKnown = true;
        mVideoWidth = width;
        mVideoHeight = height;
        if (mIsVideoReadyToBePlayed && mIsVideoSizeKnown) {
            startVideoPlayback();
        }
    }

    public void onPrepared(MediaPlayer mediaplayer) {
        Log.i(TAG, "onPrepared called");    
        mIsVideoReadyToBePlayed = true;
        if (mIsVideoReadyToBePlayed && mIsVideoSizeKnown) {
            startVideoPlayback();
        }
    }

    public void surfaceChanged(SurfaceHolder surfaceholder, int i, int j, int k) {
        Log.d(TAG, "surfaceChanged called");

    }

    public void surfaceDestroyed(SurfaceHolder surfaceholder) {
        Log.d(TAG, "surfaceDestroyed called");
    }

    public void surfaceCreated(SurfaceHolder holder) {
        Log.d(TAG, "surfaceCreated called");
        playVideo(extras.getInt(MEDIA));
        mPreview.setOnClickListener(new OnClickListener() {

            @Override
            public void onClick(View v) {
                mc.show();
            }
        });
    }

    @Override
    protected void onPause() {
        super.onPause();
        releaseMediaPlayer();
        doCleanUp();
    }

    @Override
    protected void onDestroy() {
        super.onDestroy();
        releaseMediaPlayer();
        doCleanUp();
    }

    private void releaseMediaPlayer() {
        if (mMediaPlayer != null) {
            mMediaPlayer.release();
            mMediaPlayer = null;
        }
    }

    private void doCleanUp() {
        mVideoWidth = 0;
        mVideoHeight = 0;
        mIsVideoReadyToBePlayed = false;
        mIsVideoSizeKnown = false;
    }

    private void startVideoPlayback() {
        Log.v(TAG, "startVideoPlayback");
        holder.setFixedSize(mVideoWidth, mVideoHeight);
//      mMediaPlayer.start();
    }


}

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