Libstreaming：我们可以在 surfaceview 上执行放大和缩小相机以及相机预览中的触摸对焦圈和闪光灯吗？

Question

我正在使用 libstreaming 流媒体库开发 android 应用程序。该应用程序在 Wowza 上向上游发送（移动到 Wowza）。我创建了一个 surfaceview，它具有 相机预览 。它工作正常，但我想添加三个功能（Zoom in/out、Autofous 和 Flash）。

我不知道是否可以使用 Libstreaming。

我用过的SurfaceView属于包裹 net.majorkernelpanic.streaming.gl.SurfaceView.

下面是我的 Activity 代码：

public class LiveStreamingActivity extends Activity implements RtspClient.Callback, Session.Callback, SurfaceHolder.Callback {
private static SurfaceView mSurfaceView;
private SurfaceHolder mHolder;
private Session mSession;// Rtsp session
private static RtspClient mClient;

protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    getWindow().addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON);
    getWindow().addFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN);
    requestWindowFeature(Window.FEATURE_NO_TITLE);

    setContentView(R.layout.activity_main);

    if (!LibsChecker.checkVitamioLibs(this))
        return;
    mSurfaceView = (SurfaceView) findViewById(R.id.surface_view);

    mHolder = mSurfaceView.getHolder();
    mHolder.addCallback(this);
    mHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);

}

@SuppressWarnings("deprecation")
private void initRtspClient() {
    // Configures the SessionBuilder
    mSession = SessionBuilder
            .getInstance()
            .setContext(getApplicationContext())
            .setAudioEncoder(SessionBuilder.AUDIO_AAC)
            .setAudioQuality(new AudioQuality(8000, 16000))
            .setVideoEncoder(SessionBuilder.VIDEO_H264)
            //.setVideoQuality(new VideoQuality(352, 288, 30, 300000))
            .setCamera(CameraInfo.CAMERA_FACING_BACK)
            .setSurfaceView(mSurfaceView).setPreviewOrientation(0)
            .setCallback(this).build();

    mClient = new RtspClient();
    mClient.setSession(mSession);

    mClient.setCallback(this);
    mClient.setTransportMode(RtspClient.TRANSPORT_TCP);
    mSurfaceView.setAspectRatioMode(SurfaceView.ASPECT_RATIO_PREVIEW);

    String ip, port, path;
    Pattern uri = Pattern.compile("rtsp://(.+):(\d+)/(.+)");
    Matcher m = uri.matcher("rtsp://219.65.90.226:1935/app2/myStream");
    m.find();
    ip = m.group(1);
    port = m.group(2);
    path = m.group(3);

    mClient.setCredentials(AppConfig.PUBLISHER_USERNAME,
            AppConfig.PUBLISHER_PASSWORD);
    mClient.setServerAddress(ip, Integer.parseInt(port));
    mClient.setStreamPath("/" + path);
}

@Override
protected void onResume() {System.out.println("on Resume activity 2");
    super.onResume();
    try{
        if(null != mSurfaceView){
            /* Broadcastreceiver: check network connectivity */   
            IntentFilter intentFilter = new IntentFilter();
            intentFilter.addAction("android.net.conn.CONNECTIVITY_CHANGE");
            registerReceiver(receiver, intentFilter);

            /* Start audio streaming background thread: AsyncTask */
            vmPlayer = null;
            vmPlayer = new MediaPlayer(this);
            audioStream= new AudioStreamTask(this);
            audioStream.execute("push","push","push");
        }
    }catch(Exception ex){
        ex.printStackTrace();
    }
}

@Override
protected void onPause() {
    super.onPause();
    try{
        /* release the surface view */
        if(null != mSurfaceView){
            mClient.release();
            mSession.release();
            mSurfaceView.getHolder().removeCallback(this);
        }
    }catch(Exception ex){
        ex.printStackTrace();
    }
}

@Override
public void onDestroy() {
    try {
        super.onDestroy();
        if (mClient != null) {
            mClient.release();
        }
        if (mSession != null) {
            mSession.release();
        }
        mSurfaceView.getHolder().removeCallback(this);
    } catch (Exception e) {
        System.out.println("Error while destroying activity " + e);
    }
}

private void toggleStreaming() {
    if (!mClient.isStreaming()) {
        // Start camera preview
        mSession.startPreview();
        // mFrontSession.startPreview();
        // Start video stream
        mClient.startStream();
        //startRtmpStream();
    } else {
        // already streaming, stop streaming
        // stop camera preview
        mSession.stopPreview();
        // mFrontSession.stopPreview();
        // stop streaming
        mClient.stopStream();
    }
}}

activity_main.xml

<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/surface_layout"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="@android:color/black"
android:orientation="vertical" >

<LinearLayout
    android:id="@+id/surface_view_layout"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:layout_weight="1"
    android:orientation="vertical" >

    <net.majorkernelpanic.streaming.gl.SurfaceView
        android:id="@+id/surface_view"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent"
        android:layout_gravity="center" />
</LinearLayout></FrameLayout>

我需要完整的描述来添加所有这三个相机功能。

Answer 1

我做到了！ :)

转到 VideoStream.Java 并更改： protected Camera mCamera 到 public static Camera mCamera.

转到您的 MainActivity，在您的情况下是 LiveStreamingActivity 并粘贴：

private float mDist;

@Override
public boolean onTouchEvent(MotionEvent event) {
    // Get the pointer ID

    Camera.Parameters params = VideoStream.mCamera.getParameters();
    int action = event.getAction();


    if (event.getPointerCount() > 1) {
        // handle multi-touch events
        if (action == MotionEvent.ACTION_POINTER_DOWN) {
            mDist = getFingerSpacing(event);
        } else if (action == MotionEvent.ACTION_MOVE && params.isZoomSupported()) {
            VideoStream.mCamera.cancelAutoFocus();
            handleZoom(event, params);
        }
    } else {
        // handle single touch events
        if (action == MotionEvent.ACTION_UP) {
            handleFocus(event, params);
        }
    }
    return true;
}

private void handleZoom(MotionEvent event, Camera.Parameters params) {
    int maxZoom = params.getMaxZoom();
    int zoom = params.getZoom();
    float newDist = getFingerSpacing(event);
    if (newDist > mDist) {
        //zoom in
        if (zoom < maxZoom)
            zoom++;
    } else if (newDist < mDist) {
        //zoom out
        if (zoom > 0)
            zoom--;
    }
    mDist = newDist;
    params.setZoom(zoom);
    VideoStream.mCamera.setParameters(params);
}

public void handleFocus(MotionEvent event, Camera.Parameters params) {
    int pointerId = event.getPointerId(0);
    int pointerIndex = event.findPointerIndex(pointerId);
    // Get the pointer's current position
    float x = event.getX(pointerIndex);
    float y = event.getY(pointerIndex);

    List<String> supportedFocusModes = params.getSupportedFocusModes();
    if (supportedFocusModes != null && supportedFocusModes.contains(Camera.Parameters.FOCUS_MODE_AUTO)) {
        VideoStream.mCamera.autoFocus(new Camera.AutoFocusCallback() {
            @Override
            public void onAutoFocus(boolean b, Camera camera) {
                // currently set to auto-focus on single touch
            }
        });
    }
}

/**
 * Determine the space between the first two fingers
 */
private float getFingerSpacing(MotionEvent event) {
    // ...
    float x = event.getX(0) - event.getX(1);
    float y = event.getY(0) - event.getY(1);
    return FloatMath.sqrt(x * x + y * y);
}

基于here.

如果有帮助，请告诉我！

Answer 2

谢谢@José Cunha Fonte，你的代码很棒！

对我来说（使用 Marshmallow SDK）return FloatMath.sqrt(x * x + y * y); 已弃用并消失，所以我只更改为 return (float)Math.sqrt(x * x + y * y);

希望对大家有所帮助:)

Libstreaming：我们可以在 surfaceview 上执行放大和缩小相机以及相机预览中的触摸对焦圈和闪光灯吗？

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