Novità per Android e OpenCV. State provando a implementare il codice del nuovo libro, Mastering OpenCV con i progetti pratici di Computer Vision. L'app rende fondamentalmente le immagini con vignette sull'anteprima della fotocamera usando OpenCV. È possibile toccare lo schermo per salvare l'immagine caricata.Errore OpenCV/Android BufferQueue: la trama della superficie è stata abbandonata
Il codice sorgente degli autori è here.
Ho apportato una piccola modifica (vedere di seguito) al file CartoonifierApp.java in modo che sia possibile caricare staticamente la libreria cartoonifier con l'app OpenCV Manager (il codice originale ha generato un UnsatisfiedLinkError).
Il problema che sto affrontando è che quando carico l'app sul mio Galaxy Nexus (Android 4.1.1) ottengo uno schermo nero vuoto. My LogCat dice:
E/BufferQueue(4744): [unnamed-4744-0] setBufferCount: SurfaceTexture has been abandoned! E/Cartoonifier::SurfaceView(4744): startPreview() failed
Penso che sia un problema di memoria. So che il codice cpp funziona perché funziona da solo sul mio computer, anche se il rendering è lento su un laptop relativamente nuovo (Asus U46E).
Non ho idea di come risolvere questo problema. L'unico consiglio utile che ho trovato è stato here. Se sostituisco il mio metodo setPreview in CatoonifierVewBase.java
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB)
mCamera.setPreviewTexture(new SurfaceTexture(10));
else
mCamera.setPreviewDisplay(null);
con
mCamera.setPreviewDisplay(mHolder);
poi cosa succede è la fotocamera funziona come normale e posso salvare le immagini cartoonified toccando lo schermo. Si noti che questo non è esattamente il risultato desiderato in quanto voglio creare un'immagine sempre più animata sull'anteprima della telecamera. La fotocamera funziona solo perché non sto scrivendo in superficie (almeno questa è la mia comprensione). La risposta nel già citato site ha qualche soluzione, ma non ho idea di cosa stia parlando.
BTW Ho provato tutte le app OpenCV4Android di esempio e funzionano perfettamente. Inoltre sto usando OpenCV versione 2.4.3. bersaglio livello di API è 15.
completa Logcat:
12-22 15:33:07.966: I/CartoonifierApp(5999): Instantiated new class com.Cartoonifier.CartoonifierApp 12-22 15:33:07.966: I/CartoonifierApp(5999): called onCreate 12-22 15:33:07.966: I/CartoonifierApp(5999): Trying to load OpenCV library 12-22 15:33:07.982: I/Cartoonifier::SurfaceView(5999): Instantiated new class com.Cartoonifier.CartoonifierView 12-22 15:33:07.990: I/CartoonifierApp(5999): onResume 12-22 15:33:07.990: I/Cartoonifier::SurfaceView(5999): openCamera 12-22 15:33:07.990: I/Cartoonifier::SurfaceView(5999): releaseCamera 12-22 15:33:08.099: D/OpenCVManager/Helper(5999): Service connection created 12-22 15:33:08.099: D/OpenCVManager/Helper(5999): Trying to get library path 12-22 15:33:08.138: D/OpenCVManager/Helper(5999): Trying to get library list 12-22 15:33:08.169: D/OpenCVManager/Helper(5999): Library list: "" 12-22 15:33:08.169: D/OpenCVManager/Helper(5999): First attempt to load libs 12-22 15:33:08.169: D/OpenCVManager/Helper(5999): Trying to init OpenCV libs 12-22 15:33:08.169: D/OpenCVManager/Helper(5999): Trying to load library /data/data/org.opencv.engine/lib/libopencv_java.so 12-22 15:33:08.169:
D/dalvikvm(5999): Trying to load lib /data/data/org.opencv.engine/lib/libopencv_java.so 0x41936a40 12-22
15:33:08.193: D/dalvikvm(5999): Added shared lib /data/data/org.opencv.engine/lib/libopencv_java.so 0x41936a40 12-22
15:33:08.193: D/OpenCVManager/Helper(5999): OpenCV libs init was ok!
12-22 15:33:08.193: D/OpenCVManager/Helper(5999): First attempt to load libs is OK 12-22 15:33:08.193: D/OpenCVManager/Helper(5999): Init finished with status 0 12-22 15:33:08.193: D/OpenCVManager/Helper(5999): Unbind from service 12-22 15:33:08.200: D/OpenCVManager/Helper(5999): Calling using callback 12-22 15:33:08.200: I/CartoonifierApp(5999): OpenCV loaded successfully
12-22 15:33:08.200: D/dalvikvm(5999): Trying to load lib /data/data/com.Cartoonifier/lib/libcartoonifier.so 0x41936a40 12-22
15:33:08.200: D/dalvikvm(5999): Added shared lib /data/data/com.Cartoonifier/lib/libcartoonifier.so 0x41936a40 12-22
15:33:08.200: D/dalvikvm(5999): No JNI_OnLoad found in /data/data/com.Cartoonifier/lib/libcartoonifier.so 0x41936a40, skipping init 12-22 15:33:08.200: D/OpenCVManager/Helper(5999): Service connection created 12-22 15:33:08.200: D/OpenCVManager/Helper(5999): Trying to get library path 12-22
15:33:08.232: D/OpenCVManager/Helper(5999): Trying to get library list 12-22 15:33:08.271: D/OpenCVManager/Helper(5999): Library list: ""
12-22 15:33:08.271: D/OpenCVManager/Helper(5999): First attempt to load libs 12-22 15:33:08.271: D/OpenCVManager/Helper(5999): Trying to
init OpenCV libs 12-22 15:33:08.271: D/OpenCVManager/Helper(5999): Trying to load library /data/data/org.opencv.engine/lib/libopencv_java.so 12-22 15:33:08.271: D/dalvikvm(5999): Trying to load lib /data/data/org.opencv.engine/lib/libopencv_java.so 0x41936a40 12-22
15:33:08.271: D/dalvikvm(5999): Shared lib '/data/data/org.opencv.engine/lib/libopencv_java.so' already loaded in same CL 0x41936a40 12-22 15:33:08.271: D/OpenCVManager/Helper(5999): OpenCV libs init was ok! 12-22 15:33:08.271: D/OpenCVManager/Helper(5999): First attempt to load libs is OK
12-22 15:33:08.271: D/OpenCVManager/Helper(5999): Init finished with status 0 12-22 15:33:08.271: D/OpenCVManager/Helper(5999): Unbind from service 12-22 15:33:08.271: D/OpenCVManager/Helper(5999): Calling using callback 12-22 15:33:08.271: I/CartoonifierApp(5999): OpenCV loaded successfully 12-22 15:33:08.279: D/dalvikvm(5999): Trying to load lib /data/data/com.Cartoonifier/lib/libcartoonifier.so 0x41936a40 12-22 15:33:08.279: D/dalvikvm(5999): Shared lib '/data/data/com.Cartoonifier/lib/libcartoonifier.so' already loaded in same CL 0x41936a40 12-22 15:33:08.302: I/Cartoonifier::SurfaceView(5999): surfaceCreated 12-22 15:33:08.302: I/Cartoonifier::SurfaceView(5999): surfaceChanged(). Window size: 1196x670 12-22 15:33:08.302: I/Cartoonifier::SurfaceView(5999): setupCamera(1196x670) 12-22 15:33:08.302: I/Cartoonifier::SurfaceView(5999): Starting processing thread 12-22 15:33:08.310: I/Cartoonifier::SurfaceView(5999): Found Camera Resolution 1920x1080 12-22 15:33:08.310: I/Cartoonifier::SurfaceView(5999): Found Camera Resolution 1280x720 12-22 15:33:08.310: I/Cartoonifier::SurfaceView(5999): Found Camera Resolution 960x720 12-22 15:33:08.310: I/Cartoonifier::SurfaceView(5999): Found Camera Resolution 800x480 12-22 15:33:08.310: I/Cartoonifier::SurfaceView(5999): Found Camera Resolution 720x576 12-22 15:33:08.310: I/Cartoonifier::SurfaceView(5999): Found Camera Resolution 720x480 12-22 15:33:08.310: I/Cartoonifier::SurfaceView(5999): Found Camera Resolution 768x576 12-22 15:33:08.310: I/Cartoonifier::SurfaceView(5999): Found Camera Resolution 640x480 12-22 15:33:08.310: I/Cartoonifier::SurfaceView(5999): Found Camera Resolution 320x240 12-22 15:33:08.310: I/Cartoonifier::SurfaceView(5999): Found Camera Resolution 352x288 12-22 15:33:08.310: I/Cartoonifier::SurfaceView(5999): Found Camera Resolution 240x160 12-22 15:33:08.310: I/Cartoonifier::SurfaceView(5999): Found Camera Resolution 176x144 12-22 15:33:08.310: I/Cartoonifier::SurfaceView(5999): Found Camera Resolution 128x96 12-22 15:33:08.318: I/Cartoonifier::SurfaceView(5999): Chosen Camera Preview Size: 1280x720 12-22 15:33:08.333: D/dalvikvm(5999): GC_FOR_ALLOC freed 131K, 2% free 10807K/11011K, paused 13ms, total 13ms
12-22 15:33:08.333: I/dalvikvm-heap(5999): Grow heap (frag case) to 11.902MB for 1382416-byte allocation
12-22 15:33:08.357: D/dalvikvm(5999): GC_CONCURRENT freed 1K, 3% free 12156K/12423K, paused 12ms+1ms, total 24ms
12-22 15:33:08.357: D/dalvikvm(5999): WAIT_FOR_CONCURRENT_GC blocked 11ms
12-22 15:33:08.365: D/dalvikvm(5999): GC_FOR_ALLOC freed 0K, 3% free 12156K/12423K, paused 9ms, total 9ms
12-22 15:33:08.372: I/dalvikvm-heap(5999): Grow heap (frag case) to 13.219MB for 1382416-byte allocation
12-22 15:33:08.388: D/dalvikvm(5999): GC_CONCURRENT freed 0K, 3% free 13506K/13831K, paused 11ms+1ms, total 21ms
12-22 15:33:08.388: D/dalvikvm(5999): WAIT_FOR_CONCURRENT_GC blocked 7ms
12-22 15:33:08.404: D/dalvikvm(5999): GC_FOR_ALLOC freed <1K, 3% free 13506K/13831K, paused 9ms, total 10ms
12-22 15:33:08.411: I/dalvikvm-heap(5999): Grow heap (frag case) to 16.735MB for 3686416-byte allocation
12-22 15:33:08.427: D/dalvikvm(5999): GC_CONCURRENT freed <1K, 3% free 17106K/17479K, paused 12ms+1ms, total 22ms
12-22 15:33:08.427: D/dalvikvm(5999): WAIT_FOR_CONCURRENT_GC blocked 10ms
12-22 15:33:08.443: D/dalvikvm(5999): GC_FOR_ALLOC freed <1K, 3% free 17106K/17479K, paused 10ms, total 10ms
12-22 15:33:08.450: I/dalvikvm-heap(5999): Grow heap (frag case) to 20.250MB for 3686416-byte allocation
12-22 15:33:08.466: D/dalvikvm(5999): GC_CONCURRENT freed 0K, 2% free 20706K/21127K, paused 12ms+2ms, total 22ms
12-22 15:33:08.466: D/dalvikvm(5999): WAIT_FOR_CONCURRENT_GC blocked 5ms
12-22 15:33:08.466: I/Cartoonifier::SurfaceView(5999): start preview
12-22 15:33:08.497: E/BufferQueue(5999): [unnamed-5999-0] setBufferCount: SurfaceTexture has been abandoned!
12-22 15:33:08.505: E/Cartoonifier::SurfaceView(5999): mCamera.startPreview() failed
frammento da CartoonifierApp.java mostrando la mia modifica
private BaseLoaderCallback mLoaderCallback = new BaseLoaderCallback(this) {
@Override
public void onManagerConnected(int status) {
switch (status) {
case LoaderCallbackInterface.SUCCESS:
{
Log.i(TAG, "OpenCV loaded successfully");
// Load native library after(!) OpenCV initialization
System.loadLibrary("cartoonifier");
} break;
default:
{
super.onManagerConnected(status);
} break;
}
}
};
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
Log.i(TAG, "called onCreate");
super.onCreate(savedInstanceState);
Log.i(TAG, "Trying to load OpenCV library");
if (!OpenCVLoader.initAsync(OpenCVLoader.OPENCV_VERSION_2_4_3, this, mLoaderCallback))
{
Log.e(TAG, "Cannot connect to OpenCV Manager");
}
requestWindowFeature(Window.FEATURE_NO_TITLE);
mView = new CartoonifierView(this);
setContentView(mView);
// Call our "onTouch()" callback function whenever the user touches the screen.
mView.setOnTouchListener(this);
}
@Override
protected void onPause() {
Log.i(TAG, "onPause");
super.onPause();
mView.releaseCamera();
}
@Override
public void onResume()
{
super.onResume();
Log.i(TAG, "onResume");
if (!OpenCVLoader.initAsync(OpenCVLoader.OPENCV_VERSION_2_4_3, this, mLoaderCallback))
{
Log.e(TAG, "Cannot connect to OpenCV Manager");
}
if(!mView.openCamera()) {
AlertDialog ad = new AlertDialog.Builder(this).create();
ad.setCancelable(false); // This blocks the 'BACK' button
ad.setMessage("Fatal error: can't open camera!");
/*ad.setButton("OK", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
dialog.dismiss();
finish();
}
}); */
ad.show();
}
}