【VLC-Android】vlc-android简例

【VLC-Android】vlc-android简例

 

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，，，

 

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。