Android: Camera

Hi Sam,

1) Someone asked but I didnt read the answer. Are you working for MoSync?
2) Regarding Camera: It would be nice having setJpegQuality method.

Regards,

Diego

Hi,

not fixed in 2.7

Regards,

Diego

Tks,

I will try it!

Diego

Hi,

maCameraSnaphhot raises Panic 40001. Using 2011-10-31 build.
Tested on Morotola Defy (2.2) and Xoom (3.1)

Regards,

Diego

#include <MAUtil/Moblet.h>
#include <MAUtil/PlaceholderPool.h>
#include <conprint.h>
#include <mavsprintf.h>
using namespace MAUtil;
/**
 * A Moblet is a high-level class that defines the
 * behaviour of a MoSync program.
 */
class MyMoblet : public Moblet
{
public:
	int x;
	/**
	 * Initialize the application in the constructor.
	 */
	MyMoblet()
	{
		printf("Press zero or back to exit\n");
		x = 0;
	}
	/**
	 * Called when a key is pressed.
	 */
	void keyPressEvent(int keyCode, int nativeCode)
	{
		if (MAK_BACK == keyCode || MAK_0 == keyCode)
		{
			// Call close to exit the application.
			close();
		}
		// Print the key character.
		printf("You typed: %c\n", keyCode);
	}
	/**
	 * Called when the screen is touched.
	 */
	void pointerPressEvent(MAPoint2d point)
	{
		// Print the x and y coordinate.
		if (x) {
			x=0;
			MAHandle h = MAUtil::PlaceholderPool::alloc();
			int r = maCameraSnapshot(0, h);
			maCameraStop();
			printf("maCameraSnapshot: %i", r);
			printf("Size: %i", maGetDataSize(h));

			MAHandle f = maFileOpen("/sdcard/x.jpg", MA_ACCESS_READ_WRITE);
			if (!maFileExists(f)) {
				maFileCreate(f);
			}
			maFileWriteFromData(f, h, 0, maGetDataSize(h));
			maFileClose(f);
			MAUtil::PlaceholderPool::put(h);

		} else {
			x=1;
			MA_CAMERA_FORMAT fmt;
			fmt.height = 480;
			fmt.width = 640;
			//maCameraFormat(0, &fmt);
			//maCameraSelect(0);
			int r = maCameraStart();
			if (r <= 0) {
				char *m = new char[50];
				sprintf(m, "Error %i", r);
				maPanic(r, m);
			}
		}

		printf("You touched: %i %i\n", point.x, point.y);
	}
};
/**
 * Entry point of the program. The MAMain function
 * needs to be declared as extern "C".
 */
extern "C" int MAMain()
{
	Moblet::run(new MyMoblet());
	return 0;
}

Hi,

1) If I set camera format 0 to fmt, maCameraSnapshot returns -2.

2) I think the problem is maFileWriteFromData. My app creates a datastore and uses maCopyData, but maFile is also raising panic.

Regards,

Diego

Hi,

Any good news?

Regards,

Diego

Hi,

nativeCreateBinaryResource does not raise a Panic if allocation goes wrong. Is that a possible problem? I'm using a 8M camera.

PictureCallback rawCallback = new PictureCallback() {
@Override
public void onPictureTaken(byte[] data, Camera camera) {
if(rawMode == true)
{
lock.lock();
try {
mMoSyncThread.nativeCreateBinaryResource(resourceIndex, data.length);
ByteBuffer byteBuffer = mMoSyncThread.mBinaryResources.get(resourceIndex);
byteBuffer.put(data);
dataReady = true;
condition.signalAll();
}
catch (Exception e) {
SYSLOG("Failed to create the data pool");
}
finally {
lock.unlock();
}
}
}
};

Regards,

Diego

BTW: maCameraSnapshot is returning a random number (neither MA_CAMERA_RES_OK, nor MA_CAMERA_RES_FAILED)

BTW2: CameraDemo is not working.
1) Take Picture > Image > Back does not starts camera.
2) Although set to 270x270, first picture has a different resolution. In fact, preview screen decreases the res after taking pic.

Hi Ali,

#include <MAUtil/Moblet.h>
#include <MAUI/Screen.h>
#include <MAUI/Label.h>
#include <MAUtil/PlaceholderPool.h>
#include <conprint.h>
#include <mavsprintf.h>
using namespace MAUtil;
using namespace MAUI;
class MyMoblet : public Moblet
	{
	public:
	    int x;
	    MAHandle hPicture;
	    void setupCameraProperties() {
	    	// *** Seleciona formato da foto ***
	    	MA_CAMERA_FORMAT fmt;
			fmt.height = 270;
			fmt.width = 270;
			maCameraFormat(0, &fmt);
			// *** Seleciona camera ***
			maCameraSelect(0);
			// *** Seleciona flash ***
			maCameraSetProperty(MA_CAMERA_FLASH_MODE, MA_CAMERA_FLASH_OFF);
			// *** Retorna ZOOM maximo ***
			char buffer[256];
			maCameraGetProperty(MA_CAMERA_MAX_ZOOM, buffer, 256);
			maScreenSetOrientation(SCREEN_ORIENTATION_LANDSCAPE);
	    }
	    /**
	     * Initialize the application in the constructor.
	     */
	    MyMoblet() {
	    	hPicture = 0;
	    	x = 0;
	    	setupCameraProperties();
	    	maCameraStart();
	    }
	    ~MyMoblet() {
	    	maCameraStop();
	    }
	    /**
	     * Called when a key is pressed.
	     */
	    void keyPressEvent(int keyCode, int nativeCode)
	    {
	        if (MAK_BACK == keyCode || MAK_0 == keyCode)
	        {
	            // Call close to exit the application.
	            close();
	        }
	        // Print the key character.
	        printf("You typed: %c\n", keyCode);
	    }
	    /**
	     * Called when the screen is touched.
	     */
	    void pointerPressEvent(MAPoint2d point) {
	    	x++;
	    	if (hPicture != 0) {
	    		maDestroyObject(hPicture);
	    	}
	    	hPicture = maCreatePlaceholder();
	    	int ret = maCameraSnapshot(0, hPicture);
	    	//*** Grava figura ***
	    	char s[50];
	    	sprintf(s, "/sdcard/%s.%i.%i.jpg", __TIME__, x, ret);
	    	s[10] = '_';
	    	s[13] = '_';
	    	s[16] = '_';
	    	// #1
	    	if (ret >= 0) {
				MAHandle f = maFileOpen(s, MA_ACCESS_READ_WRITE);
				if (!maFileExists(f)) {
					maFileCreate(f);
				}
				maFileWriteFromData(f, hPicture, 0, maGetDataSize(hPicture));
				maFileClose(f);
	    	} else {
	    		hPicture = 0;
	    		MAHandle f = maFileOpen(s, MA_ACCESS_READ_WRITE);
				if (!maFileExists(f)) {
					maFileCreate(f);
				}
				maFileClose(f);
	    	}

	    	// #2
	    	maCameraStop();
	    	// #3
	    	setupCameraProperties();
	    	// #4
	    	maCameraStart();
	    }
	};
	/**
	 * Entry point of the program. The MAMain function
	 * needs to be declared as extern "C".
	 */
	extern "C" int MAMain()
	{
	    Moblet::run(new MyMoblet());
	    return 0;
	}

This is the code I'm using. MoSync build 111117. Devices: Motorola Xoom, Motorola Defy (Froyo 2.2), SE Xperia X10 (GB 2.3.3 - Wolfxperia ROM)

Some points:

#1) Yes, I'm using file name to get error code. 1st click returns -2, 2nd sometimes OK. When returning OK, maFileWrite fails with 40001.

#4) W/o starting again, preview window is freezed w/ the last picture.

#3) Is it really necessary to setup again since camera class is not freed?

#2) maStop crashed the app if called twice.

Regards,

Diego

Hi,

could you send me a VM (VirtualBox/VMWare) w/ the building environment working? I could help you finding the problem.

Regards,

Diego

Hi, http://jira.mosync.com/browse/MOSYNC-425 states that maGetDataSize can't be used w/ pictures. Is that right? How do I save a snapshot? Regards, Diego

Hi Mikael,

I dont use Lua and I'm also having problems w/ the image captured by the camera. I checked Jira and there are 3 or 4 opened issues regarding camera, but I don't know if one of them is related to this post.

Regards,

Diego