private boolean openCamera(int id) {
boolean result = false;
cameraId = id;
releaseCamera();
try {
camera = Camera.open(cameraId);
} catch (Exception e) {
e.printStackTrace();
}
if (camera != null) {
try {
setUpCamera(camera);
camera.setErrorCallback(
new ErrorCallback() {
@Override
public void onError(int error, Camera camera) {}
});
camera.setPreviewDisplay(surfaceHolder);
camera.startPreview();
result = true;
} catch (IOException e) {
e.printStackTrace();
result = false;
releaseCamera();
}
}
return result;
}
protected synchronized void createCamera() throws RuntimeException {
if (mSurfaceView == null) throw new InvalidSurfaceException("Invalid surface !");
if (mSurfaceView.getHolder() == null || !mSurfaceReady)
throw new InvalidSurfaceException("Invalid surface !");
if (mCamera == null) {
openCamera();
mUpdated = false;
mUnlocked = false;
mCamera.setErrorCallback(
new Camera.ErrorCallback() {
@Override
public void onError(int error, Camera camera) {
// On some phones when trying to use the camera facing front the media server will die
// Whether or not this callback may be called really depends on the phone
if (error == Camera.CAMERA_ERROR_SERVER_DIED) {
// In this case the application must release the camera and instantiate a new one
Log.e(TAG, "Media server died !");
// We don't know in what thread we are so stop needs to be synchronized
mCameraOpenedManually = false;
stop();
} else {
Log.e(TAG, "Error unknown with the camera: " + error);
}
}
});
try {
// If the phone has a flash, we turn it on/off according to mFlashEnabled
// setRecordingHint(true) is a very nice optimization if you plane to only use the Camera
// for recording
Parameters parameters = mCamera.getParameters();
if (parameters.getFlashMode() != null) {
parameters.setFlashMode(
mFlashEnabled ? Parameters.FLASH_MODE_TORCH : Parameters.FLASH_MODE_OFF);
}
parameters.setRecordingHint(true);
mCamera.setParameters(parameters);
mCamera.setDisplayOrientation(mOrientation);
try {
if (mMode == MODE_MEDIACODEC_API_2) {
mSurfaceView.startGLThread();
mCamera.setPreviewTexture(mSurfaceView.getSurfaceTexture());
} else {
mCamera.setPreviewDisplay(mSurfaceView.getHolder());
}
} catch (IOException e) {
throw new InvalidSurfaceException("Invalid surface !");
}
} catch (RuntimeException e) {
destroyCamera();
throw e;
}
}
}
private void releaseCamera() {
try {
if (camera != null) {
camera.setPreviewCallback(null);
camera.setErrorCallback(null);
camera.stopPreview();
camera.release();
camera = null;
}
} catch (Exception e) {
e.printStackTrace();
Log.e("error", e.toString());
camera = null;
}
}
private void startPreview() throws CameraHardwareException {
if (mPausing || isFinishing()) return;
ensureCameraDevice();
// If we're previewing already, stop the preview first (this will blank
// the screen).
if (mPreviewing) stopPreview();
setPreviewDisplay(mSurfaceHolder);
setCameraParameters(UPDATE_PARAM_ALL);
mCameraDevice.setErrorCallback(mErrorCallback);
try {
mCameraDevice.startPreview();
} catch (Throwable ex) {
closeCamera();
throw new RuntimeException("startPreview failed", ex);
}
mPreviewing = true;
mStatus = IDLE;
}
private void startCaptureOnCameraThread(
final int width,
final int height,
final int framerate,
final CapturerObserver frameObserver,
final Context applicationContext) {
Throwable error = null;
checkIsOnCameraThread();
if (camera != null) {
throw new RuntimeException("Camera has already been started.");
}
this.applicationContext = applicationContext;
this.frameObserver = frameObserver;
this.firstFrameReported = false;
try {
try {
synchronized (cameraIdLock) {
Logging.d(TAG, "Opening camera " + id);
if (eventsHandler != null) {
eventsHandler.onCameraOpening(id);
}
camera = Camera.open(id);
info = new Camera.CameraInfo();
Camera.getCameraInfo(id, info);
}
} catch (RuntimeException e) {
openCameraAttempts++;
if (openCameraAttempts < MAX_OPEN_CAMERA_ATTEMPTS) {
Logging.e(TAG, "Camera.open failed, retrying", e);
openCameraOnCodecThreadRunner =
new Runnable() {
@Override
public void run() {
startCaptureOnCameraThread(
width, height, framerate, frameObserver, applicationContext);
}
};
cameraThreadHandler.postDelayed(openCameraOnCodecThreadRunner, OPEN_CAMERA_DELAY_MS);
return;
}
openCameraAttempts = 0;
throw e;
}
try {
camera.setPreviewTexture(surfaceHelper.getSurfaceTexture());
} catch (IOException e) {
Logging.e(TAG, "setPreviewTexture failed", error);
throw new RuntimeException(e);
}
Logging.d(
TAG,
"Camera orientation: "
+ info.orientation
+ " .Device orientation: "
+ getDeviceOrientation());
camera.setErrorCallback(cameraErrorCallback);
startPreviewOnCameraThread(width, height, framerate);
frameObserver.onCapturerStarted(true);
// Start camera observer.
cameraThreadHandler.postDelayed(cameraObserver, CAMERA_OBSERVER_PERIOD_MS);
return;
} catch (RuntimeException e) {
error = e;
}
Logging.e(TAG, "startCapture failed", error);
stopCaptureOnCameraThread();
frameObserver.onCapturerStarted(false);
if (eventsHandler != null) {
eventsHandler.onCameraError("Camera can not be started.");
}
return;
}
@Override
public void setErrorCallback(Camera.ErrorCallback cb) {
camera.setErrorCallback(cb);
}
