【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。