【VLC-Android】vlc-android简例——注意参考文献

前言

　　继续折腾vlc，做这个例子并不顺利，卡在只有声音没有图像这个问题好久，网上的例子有些API已经对不上，继续分享，，，

 

声明
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正文

　　截图

　　　　

　　项目

　　　　

　　代码

public class VlcVideoActivity extends Activity implements SurfaceHolder.Callback, IVideoPlayer {    private final static String TAG = "[VlcVideoActivity]";    private SurfaceView mSurfaceView;    private LibVLC mMediaPlayer;    private SurfaceHolder mSurfaceHolder;        private View mLoadingView;    private int mVideoHeight;    private int mVideoWidth;    private int mVideoVisibleHeight;    private int mVideoVisibleWidth;    private int mSarNum;    private int mSarDen;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_video_vlc);        mSurfaceView = (SurfaceView) findViewById(R.id.video);        mLoadingView = findViewById(R.id.video_loading);        try {            mMediaPlayer = VLCInstance.getLibVlcInstance();        } catch (LibVlcException e) {            e.printStackTrace();        }        mSurfaceHolder = mSurfaceView.getHolder();        mSurfaceHolder.setFormat(PixelFormat.RGBX_8888);        mSurfaceHolder.addCallback(this);        mMediaPlayer.eventVideoPlayerActivityCreated(true);        EventHandler em = EventHandler.getInstance();        em.addHandler(mVlcHandler);        this.setVolumeControlStream(AudioManager.STREAM_MUSIC);        mSurfaceView.setKeepScreenOn(true);        //        mMediaPlayer.setMediaList();        //        mMediaPlayer.getMediaList().add(new Media(mMediaPlayer, "http://live.3gv.ifeng.com/zixun.m3u8"), false);        //        mMediaPlayer.playIndex(0);        mMediaPlayer.playMRL("http://live.3gv.ifeng.com/zixun.m3u8");    }    @Override    public void onPause() {        super.onPause();        if (mMediaPlayer != null) {            mMediaPlayer.stop();            mSurfaceView.setKeepScreenOn(false);        }    }    @Override    protected void onDestroy() {        super.onDestroy();        if (mMediaPlayer != null) {            mMediaPlayer.eventVideoPlayerActivityCreated(false);            EventHandler em = EventHandler.getInstance();            em.removeHandler(mVlcHandler);        }    }    @Override    public void onConfigurationChanged(Configuration newConfig) {        setSurfaceSize(mVideoWidth, mVideoHeight, mVideoVisibleWidth, mVideoVisibleHeight, mSarNum, mSarDen);        super.onConfigurationChanged(newConfig);    }    @Override    public void surfaceCreated(SurfaceHolder holder) {        if (mMediaPlayer != null) {            mSurfaceHolder = holder;            mMediaPlayer.attachSurface(holder.getSurface(), this);        }    }    @Override    public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) {        mSurfaceHolder = holder;        if (mMediaPlayer != null) {            mMediaPlayer.attachSurface(holder.getSurface(), this);//, width, height        }        if (width > 0) {            mVideoHeight = height;            mVideoWidth = width;        }    }    @Override    public void surfaceDestroyed(SurfaceHolder holder) {        if (mMediaPlayer != null) {            mMediaPlayer.detachSurface();        }    }    @Override    public void setSurfaceSize(int width, int height, int visible_width, int visible_height, int sar_num, int sar_den) {        mVideoHeight = height;        mVideoWidth = width;        mVideoVisibleHeight = visible_height;        mVideoVisibleWidth = visible_width;        mSarNum = sar_num;        mSarDen = sar_den;        mHandler.removeMessages(HANDLER_SURFACE_SIZE);        mHandler.sendEmptyMessage(HANDLER_SURFACE_SIZE);    }    private static final int HANDLER_BUFFER_START = 1;    private static final int HANDLER_BUFFER_END = 2;    private static final int HANDLER_SURFACE_SIZE = 3;    private static final int SURFACE_BEST_FIT = 0;    private static final int SURFACE_FIT_HORIZONTAL = 1;    private static final int SURFACE_FIT_VERTICAL = 2;    private static final int SURFACE_FILL = 3;    private static final int SURFACE_16_9 = 4;    private static final int SURFACE_4_3 = 5;    private static final int SURFACE_ORIGINAL = 6;    private int mCurrentSize = SURFACE_BEST_FIT;    private Handler mVlcHandler = new Handler() {        @Override        public void handleMessage(Message msg) {            if (msg == null || msg.getData() == null)                return;            switch (msg.getData().getInt("event")) {            case EventHandler.MediaPlayerTimeChanged:                break;            case EventHandler.MediaPlayerPositionChanged:                break;            case EventHandler.MediaPlayerPlaying:                mHandler.removeMessages(HANDLER_BUFFER_END);                mHandler.sendEmptyMessage(HANDLER_BUFFER_END);                break;            case EventHandler.MediaPlayerBuffering:                break;            case EventHandler.MediaPlayerLengthChanged:                break;            case EventHandler.MediaPlayerEndReached:                //播放完成                break;            }        }    };    private Handler mHandler = new Handler() {        @Override        public void handleMessage(Message msg) {            switch (msg.what) {            case HANDLER_BUFFER_START:                showLoading();                break;            case HANDLER_BUFFER_END:                hideLoading();                break;            case HANDLER_SURFACE_SIZE:                changeSurfaceSize();                break;            }        }    };    private void showLoading() {        mLoadingView.setVisibility(View.VISIBLE);    }    private void hideLoading() {        mLoadingView.setVisibility(View.GONE);    }    private void changeSurfaceSize() {        // get screen size        int dw = getWindowManager().getDefaultDisplay().getWidth();        int dh = getWindowManager().getDefaultDisplay().getHeight();        // calculate aspect ratio        double ar = (double) mVideoWidth / (double) mVideoHeight;        // calculate display aspect ratio        double dar = (double) dw / (double) dh;        switch (mCurrentSize) {        case SURFACE_BEST_FIT:            if (dar < ar)                dh = (int) (dw / ar);            else                dw = (int) (dh * ar);            break;        case SURFACE_FIT_HORIZONTAL:            dh = (int) (dw / ar);            break;        case SURFACE_FIT_VERTICAL:            dw = (int) (dh * ar);            break;        case SURFACE_FILL:            break;        case SURFACE_16_9:            ar = 16.0 / 9.0;            if (dar < ar)                dh = (int) (dw / ar);            else                dw = (int) (dh * ar);            break;        case SURFACE_4_3:            ar = 4.0 / 3.0;            if (dar < ar)                dh = (int) (dw / ar);            else                dw = (int) (dh * ar);            break;        case SURFACE_ORIGINAL:            dh = mVideoHeight;            dw = mVideoWidth;            break;        }        mSurfaceHolder.setFixedSize(mVideoWidth, mVideoHeight);        ViewGroup.LayoutParams lp = mSurfaceView.getLayoutParams();        lp.width = dw;        lp.height = dh;        mSurfaceView.setLayoutParams(lp);        mSurfaceView.invalidate();    }}

　　　　代码说明 

　　　　　　1、vlc-android的版本为2.2.0-pre1 Weatherwax

　　　　　　2、拷贝vlc-android官网例子下面org.videolan.libvlc所有的类，以及VLCInstance、Preferences。只有声音没有画面就出在VLCInstance这个问题上，少了一些配置，参考VLCInstance.updateLibVlcSettings。

　　　　　　3、playMRL不要用Uri来转，否则打不开

　　　　　　4、提供的代码已经编译好了so，也修改源码打开了EventHandler.MediaPlayerBuffering（也修改了libvlcjni.c），但是还是没有缓冲进度的值，还有待进一步探索。

　　　　　　5、实际发现如果只在surfaceChanged中attachSurface，setSurfaceSize回调不会触发，需要同时在surfaceCreated中设置。

　　　　　　6、本文不讨论Handler非静态可能引发内存泄露的问题，大家写的时候自己注意一下 :) 

 

　　下载

　　　　https://github.com/over140/vlc-android-demo （注意工程是Android Studio的工程）

 

　　文章

　　　　1、vlc-android 中调用用libvlcjni.so实现流媒体播放 

　　　　2、[Github]vlc-android-macbuild

　　　　3、vlc android的编译及截图，录制视频等功能

　　　　4、vlc-android源码编译过程记录

　　　　5、vlc-android 获取MediaPlayerEncounteredError，MediaPlayerBuffering等各种事件的响应

　　　　6、Vlc-for-android源码分析

 

结束

　　 文章2的GitHub项目是对vlc进行封装，也挺不错了，值得参考。vlc-android的例子写的比较复杂，而且api可能老变，大家看文章的时候注意一下版本问题。