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@ -2,6 +2,7 @@ package org.opencv.samples.tutorial4; |
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import java.io.IOException; |
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import java.util.List; |
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import android.content.Context; |
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import android.graphics.Bitmap; |
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import android.graphics.Canvas; |
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@ -15,14 +16,14 @@ import android.view.SurfaceHolder; |
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import android.view.SurfaceView; |
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public abstract class SampleViewBase extends SurfaceView implements SurfaceHolder.Callback, Runnable { |
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private static final String TAG = "Sample::SurfaceView"; |
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private static final String TAG = "OCVSample::BaseView"; |
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private Camera mCamera; |
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private SurfaceHolder mHolder; |
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private int mFrameWidth; |
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private int mFrameHeight; |
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private byte[] mFrame; |
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private boolean mThreadRun; |
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private volatile boolean mThreadRun; |
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private byte[] mBuffer; |
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private SurfaceTexture mSf; |
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@ -52,11 +53,29 @@ public abstract class SampleViewBase extends SurfaceView implements SurfaceHolde |
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} |
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public boolean openCamera() { |
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Log.i(TAG, "openCamera"); |
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releaseCamera(); |
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mCamera = Camera.open(); |
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Log.i(TAG, "Opening Camera"); |
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mCamera = null; |
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try { |
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mCamera = Camera.open(); |
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} |
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catch (Exception e){ |
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Log.e(TAG, "Camera is not available (in use or does not exist): " + e.getLocalizedMessage()); |
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} |
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if(mCamera == null && Build.VERSION.SDK_INT >= Build.VERSION_CODES.GINGERBREAD) { |
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for (int camIdx = 0; camIdx < Camera.getNumberOfCameras(); ++camIdx) { |
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try { |
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mCamera = Camera.open(camIdx); |
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} |
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catch (RuntimeException e) { |
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Log.e(TAG, "Camera #" + camIdx + "failed to open: " + e.getLocalizedMessage()); |
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} |
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} |
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} |
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if(mCamera == null) { |
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Log.e(TAG, "Can't open camera!"); |
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Log.e(TAG, "Can't open any camera"); |
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return false; |
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} |
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@ -69,16 +88,16 @@ public abstract class SampleViewBase extends SurfaceView implements SurfaceHolde |
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camera.addCallbackBuffer(mBuffer); |
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} |
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}); |
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return true; |
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} |
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public void releaseCamera() { |
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Log.i(TAG, "releaseCamera"); |
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Log.i(TAG, "Releasing Camera"); |
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mThreadRun = false; |
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synchronized (this) { |
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if (mCamera != null) { |
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mCamera.stopPreview(); |
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mCamera.setPreviewCallback(null); |
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mCamera.release(); |
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mCamera = null; |
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} |
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@ -86,78 +105,81 @@ public abstract class SampleViewBase extends SurfaceView implements SurfaceHolde |
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onPreviewStopped(); |
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} |
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public void setupCamera(int width, int height) { |
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Log.i(TAG, "setupCamera"); |
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synchronized (this) { |
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if (mCamera != null) { |
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Camera.Parameters params = mCamera.getParameters(); |
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List<Camera.Size> sizes = params.getSupportedPreviewSizes(); |
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mFrameWidth = width; |
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mFrameHeight = height; |
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// selecting optimal camera preview size
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{ |
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int minDiff = Integer.MAX_VALUE; |
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for (Camera.Size size : sizes) { |
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if (Math.abs(size.height - height) < minDiff) { |
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mFrameWidth = size.width; |
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mFrameHeight = size.height; |
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minDiff = Math.abs(size.height - height); |
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} |
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public synchronized void setupCamera(int width, int height) { |
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if (mCamera != null) { |
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Log.i(TAG, "Setup Camera - " + width + "x" + height); |
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Camera.Parameters params = mCamera.getParameters(); |
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List<Camera.Size> sizes = params.getSupportedPreviewSizes(); |
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mFrameWidth = width; |
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mFrameHeight = height; |
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// selecting optimal camera preview size
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{ |
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int minDiff = Integer.MAX_VALUE; |
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for (Camera.Size size : sizes) { |
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if (Math.abs(size.height - height) < minDiff) { |
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mFrameWidth = size.width; |
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mFrameHeight = size.height; |
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minDiff = Math.abs(size.height - height); |
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} |
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} |
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} |
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params.setPreviewSize(getFrameWidth(), getFrameHeight()); |
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List<String> FocusModes = params.getSupportedFocusModes(); |
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if (FocusModes.contains(Camera.Parameters.FOCUS_MODE_CONTINUOUS_VIDEO)) |
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{ |
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params.setFocusMode(Camera.Parameters.FOCUS_MODE_CONTINUOUS_VIDEO); |
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} |
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params.setPreviewSize(getFrameWidth(), getFrameHeight()); |
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mCamera.setParameters(params); |
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List<String> FocusModes = params.getSupportedFocusModes(); |
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if (FocusModes.contains(Camera.Parameters.FOCUS_MODE_CONTINUOUS_VIDEO)) |
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{ |
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params.setFocusMode(Camera.Parameters.FOCUS_MODE_CONTINUOUS_VIDEO); |
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} |
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/* Now allocate the buffer */ |
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params = mCamera.getParameters(); |
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int size = params.getPreviewSize().width * params.getPreviewSize().height; |
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size = size * ImageFormat.getBitsPerPixel(params.getPreviewFormat()) / 8; |
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mBuffer = new byte[size]; |
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/* The buffer where the current frame will be copied */ |
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mFrame = new byte [size]; |
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mCamera.addCallbackBuffer(mBuffer); |
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mCamera.setParameters(params); |
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/* Notify that the preview is about to be started and deliver preview size */ |
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onPreviewStarted(params.getPreviewSize().width, params.getPreviewSize().height); |
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/* Now allocate the buffer */ |
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params = mCamera.getParameters(); |
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int size = params.getPreviewSize().width * params.getPreviewSize().height; |
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size = size * ImageFormat.getBitsPerPixel(params.getPreviewFormat()) / 8; |
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mBuffer = new byte[size]; |
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/* The buffer where the current frame will be copied */ |
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mFrame = new byte [size]; |
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mCamera.addCallbackBuffer(mBuffer); |
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try { |
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setPreview(); |
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} catch (IOException e) { |
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Log.e(TAG, "mCamera.setPreviewDisplay/setPreviewTexture fails: " + e); |
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} |
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/* Notify that the preview is about to be started and deliver preview size */ |
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onPreviewStarted(params.getPreviewSize().width, params.getPreviewSize().height); |
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/* Now we can start a preview */ |
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mCamera.startPreview(); |
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try { |
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setPreview(); |
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} catch (IOException e) { |
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Log.e(TAG, "mCamera.setPreviewDisplay/setPreviewTexture fails: " + e); |
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} |
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/* Now we can start a preview */ |
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mCamera.startPreview(); |
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} |
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} |
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public void surfaceChanged(SurfaceHolder _holder, int format, int width, int height) { |
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Log.i(TAG, "surfaceChanged"); |
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Log.i(TAG, "called surfaceChanged"); |
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// stop preview before making changes
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try { |
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mCamera.stopPreview(); |
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} catch (Exception e){ |
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// ignore: tried to stop a non-existent preview
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} |
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// start preview with new settings
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setupCamera(width, height); |
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} |
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public void surfaceCreated(SurfaceHolder holder) { |
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Log.i(TAG, "surfaceCreated"); |
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Log.i(TAG, "called surfaceCreated"); |
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(new Thread(this)).start(); |
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} |
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public void surfaceDestroyed(SurfaceHolder holder) { |
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Log.i(TAG, "surfaceDestroyed"); |
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releaseCamera(); |
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Log.i(TAG, "called surfaceDestroyed"); |
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} |
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/* The bitmap returned by this method shall be owned by the child and released in onPreviewStopped() */ |
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protected abstract Bitmap processFrame(byte[] data); |
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@ -178,13 +200,15 @@ public abstract class SampleViewBase extends SurfaceView implements SurfaceHolde |
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public void run() { |
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mThreadRun = true; |
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Log.i(TAG, "Starting processing thread"); |
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Log.i(TAG, "Started processing thread"); |
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while (mThreadRun) { |
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Bitmap bmp = null; |
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synchronized (this) { |
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try { |
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this.wait(); |
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if (!mThreadRun) |
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break; |
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bmp = processFrame(mFrame); |
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} catch (InterruptedException e) { |
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e.printStackTrace(); |
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@ -199,5 +223,6 @@ public abstract class SampleViewBase extends SurfaceView implements SurfaceHolde |
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} |
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} |
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} |
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Log.i(TAG, "Finished processing thread"); |
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} |
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} |
Andrey Kamaev
12 years ago