Android flux MJPEG

J'ai mis en œuvre Android et MJPEG

et aussi mis en place async et des certifications pour l'exécuter ce qui est mentionné ici. Maintenant, j'ai réussi à exécuter les jpeg flux vidéo, mais le problème est qu'Il continue de clignoter lors de l'exécution du flux de données. Il ne cesse de se sur et en dehors. Je pense qu'il pourrait être question d'images. Personne n'a l'idée de comment gérer cela. Voici le code complet que j'ai mis en œuvre:

MjpegSample.java

public class MjpegSample extends Activity {
private static final boolean DEBUG=true;
private static final String TAG = "MJPEG";
private MjpegView mv;
private static final int MENU_QUIT = 1;
String URL;
MjpegInputStream inputStream;
/* Creates the menu items */
public boolean onCreateOptionsMenu(Menu menu) {    
menu.add(0, MENU_QUIT, 0, "Quit");
return true;
}
/* Handles item selections */
public boolean onOptionsItemSelected(MenuItem item) {    
switch (item.getItemId()) {
case MENU_QUIT:
finish();
return true;    
}    
return false;
}
public void onCreate(Bundle icicle) {
super.onCreate(icicle);
//sample public cam
URL = "https://orangefr-eu-oem-storage11.mios.com/storage/storage/store/81976/archive?Key=2147780009";
requestWindowFeature(Window.FEATURE_NO_TITLE);
getWindow().setFlags(WindowManager.LayoutParams.FLAG_FORCE_NOT_FULLSCREEN, WindowManager.LayoutParams.FLAG_FORCE_NOT_FULLSCREEN);
mv = new MjpegView(this);
setContentView(mv);        
new DoRead().execute(URL);
}
public class DoRead extends AsyncTask<String, Void, MjpegInputStream> {
protected MjpegInputStream doInBackground(String... url) {
//TODO: if camera has authentication deal with it and don't just not work
HttpResponse res = null;         
DefaultHttpClient httpclient = new DefaultHttpClient(); 
HttpParams httpParams = httpclient.getParams();
HttpConnectionParams.setConnectionTimeout(httpParams, 5*1000);
HttpConnectionParams.setSoTimeout(httpParams, 5*1000);
if(DEBUG) Log.d(TAG, "1. Sending http request");
try {
res = httpclient.execute(new HttpGet(URI.create(url[0])));
if(DEBUG) Log.d(TAG, "2. Request finished, status = " + res.getStatusLine().getStatusCode());
if(res.getStatusLine().getStatusCode()==401){
//You must turn off camera User Access Control before this will work
return null;
}
return new MjpegInputStream(res.getEntity().getContent());  
} catch (ClientProtocolException e) {
if(DEBUG){
e.printStackTrace();
Log.d(TAG, "Request failed-ClientProtocolException", e);
}
//Error connecting to camera
} catch (IOException e) {
if(DEBUG){
e.printStackTrace();
Log.d(TAG, "Request failed-IOException", e);
}
//Error connecting to camera
}
return null;
}
protected void onPostExecute(MjpegInputStream result) {
mv.setSource(result);
/*if(result!=null){
result.setSkip(1);
setTitle(R.string.app_name);
}else{
setTitle(R.string.title_disconnected);
}*/
mv.setDisplayMode(MjpegView.SIZE_FULLSCREEN);
mv.showFps(false);
}
}
public void onPause() {
super.onPause();
mv.stopPlayback();
}

}

MjpegView.java

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 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, String text) {
Rect b = new Rect();
p.getTextBounds(text, 0, text.length(), b);
int bwidth  = b.width()+2;
int bheight = b.height()+2;
Bitmap bm = Bitmap.createBitmap(bwidth, bheight, Bitmap.Config.ARGB_8888);
Canvas c = new Canvas(bm);
p.setColor(overlayBackgroundColor);
c.drawRect(0, 0, bwidth, bheight, p);
p.setColor(overlayTextColor);
c.drawText(text, -b.left+1, (bheight/2)-((p.ascent()+p.descent())/2)+1, 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();
String fps = "";
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) {
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, fps);
}
}
} 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; 
}

}

MjpegInputStream.java

public class MjpegInputStream extends DataInputStream {
private final byte[] SOI_MARKER = { (byte) 0xFF, (byte) 0xD8 };
private final byte[] EOF_MARKER = { (byte) 0xFF, (byte) 0xD9 };
private final String CONTENT_LENGTH = "Content-Length";
private final static int HEADER_MAX_LENGTH = 100;
private final static int FRAME_MAX_LENGTH = 40000 + HEADER_MAX_LENGTH;
private int mContentLength = -1;
public static MjpegInputStream read(String url) {
HttpResponse res;
DefaultHttpClient httpclient = new DefaultHttpClient();     
try {
res = httpclient.execute(new HttpGet(URI.create(url)));
return new MjpegInputStream(res.getEntity().getContent());              
} catch (ClientProtocolException e) {
} catch (IOException e) {}
return null;
}
public MjpegInputStream(InputStream in) { super(new BufferedInputStream(in, FRAME_MAX_LENGTH)); }
private int getEndOfSeqeunce(DataInputStream in, byte[] sequence) throws IOException {
int seqIndex = 0;
byte c;
for(int i=0; i < FRAME_MAX_LENGTH; i++) {
c = (byte) in.readUnsignedByte();
if(c == sequence[seqIndex]) {
seqIndex++;
if(seqIndex == sequence.length) return i + 1;
} else seqIndex = 0;
}
return -1;
}
private int getStartOfSequence(DataInputStream in, byte[] sequence) throws IOException {
int end = getEndOfSeqeunce(in, sequence);
return (end < 0) ? (-1) : (end - sequence.length);
}
private int parseContentLength(byte[] headerBytes) throws IOException, NumberFormatException {
ByteArrayInputStream headerIn = new ByteArrayInputStream(headerBytes);
Properties props = new Properties();
props.load(headerIn);
return Integer.parseInt(props.getProperty(CONTENT_LENGTH));
}   
public Bitmap readMjpegFrame() throws IOException {
mark(FRAME_MAX_LENGTH);
int headerLen = getStartOfSequence(this, SOI_MARKER);
reset();
byte[] header = new byte[headerLen];
readFully(header);
try {
mContentLength = parseContentLength(header);
} catch (NumberFormatException nfe) { 
mContentLength = getEndOfSeqeunce(this, EOF_MARKER); 
}
reset();
byte[] frameData = new byte[mContentLength];
skipBytes(headerLen);
readFully(frameData);
return BitmapFactory.decodeStream(new ByteArrayInputStream(frameData));
}}

OriginalL'auteur Nouman Bhatti | 2014-06-09