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package de.mjpegsample.MjpegView; import java.io.IOException; import android.content.Context; import android.graphics.Bitmap; import android.graphics.Canvas; import android.graphics.Color; import android.graphics.Paint; import android.graphics.PorterDuff; import android.graphics.PorterDuffXfermode; import android.graphics.Rect; import android.graphics.Typeface; import android.util.AttributeSet; import android.view.SurfaceHolder; import android.view.SurfaceView; public class MjpegView extends SurfaceView implements SurfaceHolder.Callback { public final static int POSITION_UPPER_LEFT = 9; public final static int POSITION_UPPER_RIGHT = 3; public final static int POSITION_LOWER_LEFT = 12; public final static int POSITION_LOWER_RIGHT = 6; public final static int SIZE_STANDARD = 1; public final static int SIZE_BEST_FIT = 4; public final static int SIZE_FULLSCREEN = 8; private MjpegViewThread thread; private MjpegInputStream mIn = null; private boolean showFps = false; private boolean mRun = false; private boolean surfaceDone = false; private Paint overlayPaint; private int overlayTextColor; private int overlayBackgroundColor; private int ovlPos; private int dispWidth; private int dispHeight; private int displayMode; public class MjpegViewThread extends Thread { private SurfaceHolder mSurfaceHolder; private int frameCounter = 0; private long start; private String fps = ""; private Bitmap ovl; public MjpegViewThread(SurfaceHolder surfaceHolder, Context context) { mSurfaceHolder = surfaceHolder; } private Rect destRect(int bmw, int bmh) { int tempx; int tempy; if (displayMode == MjpegView.SIZE_STANDARD) { tempx = (dispWidth / 2) - (bmw / 2); tempy = (dispHeight / 2) - (bmh / 2); return new Rect(tempx, tempy, bmw + tempx, bmh + tempy); } if (displayMode == MjpegView.SIZE_BEST_FIT) { float bmasp = (float) bmw / (float) bmh; bmw = dispWidth; bmh = (int) (dispWidth / bmasp); if (bmh > dispHeight) { bmh = dispHeight; bmw = (int) (dispHeight * bmasp); } tempx = (dispWidth / 2) - (bmw / 2); tempy = (dispHeight / 2) - (bmh / 2); return new Rect(tempx, tempy, bmw + tempx, bmh + tempy); } if (displayMode == MjpegView.SIZE_FULLSCREEN) return new Rect(0, 0, dispWidth, dispHeight); return null; } public void setSurfaceSize(int width, int height) { synchronized(mSurfaceHolder) { dispWidth = width; dispHeight = height; } } private Bitmap makeFpsOverlay(Paint p) { Rect b = new Rect(); p.getTextBounds(fps, 0, fps.length(), b); // false indentation to fix forum layout Bitmap bm = Bitmap.createBitmap(b.width(), b.height(), Bitmap.Config.ARGB_8888); Canvas c = new Canvas(bm); p.setColor(overlayBackgroundColor); c.drawRect(0, 0, b.width(), b.height(), p); p.setColor(overlayTextColor); c.drawText(fps, -b.left, b.bottom-b.top-p.descent(), p); return bm; } public void run() { start = System.currentTimeMillis(); PorterDuffXfermode mode = new PorterDuffXfermode(PorterDuff.Mode.DST_OVER); Bitmap bm; int width; int height; Rect destRect; Canvas c = null; Paint p = new Paint(); while (mRun) { if(surfaceDone) { try { c = mSurfaceHolder.lockCanvas(); synchronized (mSurfaceHolder) { try { bm = mIn.readMjpegFrame(); destRect = destRect(bm.getWidth(),bm.getHeight()); c.drawColor(Color.BLACK); c.drawBitmap(bm, null, destRect, p); if(showFps) { p.setXfermode(mode); if(ovl != null) { // false indentation to fix forum layout height = ((ovlPos & 1) == 1) ? destRect.top : destRect.bottom-ovl.getHeight(); width = ((ovlPos & 8) == 8) ? destRect.left : destRect.right -ovl.getWidth(); c.drawBitmap(ovl, width, height, null); } p.setXfermode(null); frameCounter++; if((System.currentTimeMillis() - start) >= 1000) { fps = String.valueOf(frameCounter)+"fps"; frameCounter = 0; start = System.currentTimeMillis(); ovl = makeFpsOverlay(overlayPaint); } } } catch (IOException e) {} } } finally { if (c != null) mSurfaceHolder.unlockCanvasAndPost(c); } } } } } private void init(Context context) { SurfaceHolder holder = getHolder(); holder.addCallback(this); thread = new MjpegViewThread(holder, context); setFocusable(true); overlayPaint = new Paint(); overlayPaint.setTextAlign(Paint.Align.LEFT); overlayPaint.setTextSize(12); overlayPaint.setTypeface(Typeface.DEFAULT); overlayTextColor = Color.WHITE; overlayBackgroundColor = Color.BLACK; ovlPos = MjpegView.POSITION_LOWER_RIGHT; displayMode = MjpegView.SIZE_STANDARD; dispWidth = getWidth(); dispHeight = getHeight(); } public void startPlayback() { if(mIn != null) { mRun = true; thread.start(); } } public void stopPlayback() { mRun = false; boolean retry = true; while(retry) { try { thread.join(); retry = false; } catch (InterruptedException e) {} } } public MjpegView(Context context, AttributeSet attrs) { super(context, attrs); init(context); } public void surfaceChanged(SurfaceHolder holder, int f, int w, int h) { thread.setSurfaceSize(w, h); } public void surfaceDestroyed(SurfaceHolder holder) { surfaceDone = false; stopPlayback(); } public MjpegView(Context context) { super(context); init(context); } public void surfaceCreated(SurfaceHolder holder) { surfaceDone = true; } public void showFps(boolean b) { showFps = b; } public void setSource(MjpegInputStream source) { mIn = source; startPlayback();} public void setOverlayPaint(Paint p) { overlayPaint = p; } public void setOverlayTextColor(int c) { overlayTextColor = c; } public void setOverlayBackgroundColor(int c) { overlayBackgroundColor = c; } public void setOverlayPosition(int p) { ovlPos = p; } public void setDisplayMode(int s) { displayMode = s; } }