Android Camera2 实现连拍

2024-06-13 15:01| 来源: 网络整理| 查看: 265

gitee 链接：通过 captureBurst 实现连拍拍完的图片放在 /data/data/com.example.burstcapture/files/ 图片路径连拍的具体实现代码在 BurstCapture.java 、BurstCaptureExpo.java、BurstCaptureFocus.java中，调用在 MainActivity.java中，调用方式很简单连拍调用方式

普通连拍直接创建 BurstCapture 这个类，在这个类的构造方法中会发 request

注意：下面代码中的照片保存的路径 /data/data/com.example.burstcapture/files/ 中的 files 文件夹是我自己创建的，你需要自己手动创建下。

下面代码即可实现连拍：

mImageReader.setOnImageAvailableListener(mReaderImgListener, null); mStillBuilder = mCameraDevice.createCaptureRequest(CameraDevice.TEMPLATE_STILL_CAPTURE); mStillBuilder.addTarget(mImageSurface); CaptureRequest request = mStillBuilder.build(); List requests = new ArrayList(); // 改变下面的i的取值范围就可以改变连拍的数量 for(int i=0;i writeImageToFile(); } }; private void writeImageToFile() { String filePath = "/data/data/com.example.burstcapture/files/"+imageIndex+".jpg"; imageIndex++; Image image = mImageReader.acquireNextImage(); if (image == null) { return; } ByteBuffer byteBuffer = image.getPlanes()[0].getBuffer(); byte[] data = new byte[byteBuffer.remaining()]; byteBuffer.get(data); FileOutputStream fos = null; try { fos = new FileOutputStream(new File(filePath)); fos.write(data); } catch (FileNotFoundException e) { e.printStackTrace(); } catch (IOException e) { e.printStackTrace(); } finally { try { fos.close(); fos = null; } catch (IOException e) { e.printStackTrace(); } finally { image.close(); image = null; } } }

不同曝光时间的连拍：

mStillBuilder = mCameraDevice.createCaptureRequest(CameraDevice.TEMPLATE_STILL_CAPTURE); mStillBuilder.set(CaptureRequest.CONTROL_CAPTURE_INTENT, CaptureRequest.CONTROL_CAPTURE_INTENT_STILL_CAPTURE); // 把AE关掉，通过手动的方式控制AE mStillBuilder.set(CaptureRequest.CONTROL_AE_MODE, CameraMetadata.CONTROL_AE_MODE_OFF); private void takePicturePrecapture(){ final CaptureRequest.Builder precaptureBuilder; try { precaptureBuilder = mCameraDevice.createCaptureRequest(CameraDevice.TEMPLATE_STILL_CAPTURE); precaptureBuilder.set(CaptureRequest.CONTROL_CAPTURE_INTENT, CaptureRequest.CONTROL_CAPTURE_INTENT_STILL_CAPTURE); precaptureBuilder.set(CaptureRequest.CONTROL_AF_TRIGGER, CameraMetadata.CONTROL_AF_TRIGGER_IDLE); precaptureBuilder.set(CaptureRequest.CONTROL_AE_PRECAPTURE_TRIGGER, CameraMetadata.CONTROL_AE_PRECAPTURE_TRIGGER_IDLE); precaptureBuilder.addTarget(mPreViewSurface); int sequenceId = mCaptureSession.capture(precaptureBuilder.build(), null, null); sequenceId = mCaptureSession.setRepeatingRequest(precaptureBuilder.build(), null, null); precaptureBuilder.set(CaptureRequest.CONTROL_AE_PRECAPTURE_TRIGGER, CameraMetadata.CONTROL_AE_PRECAPTURE_TRIGGER_START); sequenceId = mCaptureSession.capture(precaptureBuilder.build(), mMCaptureCallback, null); } catch (CameraAccessException e) { e.printStackTrace(); } } MCaptureCallback mMCaptureCallback = new MCaptureCallback(); private class MCaptureCallback extends CameraCaptureSession.CaptureCallback { @Override public void onCaptureCompleted(@NonNull CameraCaptureSession session, @NonNull CaptureRequest request, @NonNull TotalCaptureResult result) { Log.e("TAG", "============================== onCaptureCompleted: "); Integer ae_state = result.get(CaptureResult.CONTROL_AE_STATE); if (ae_state == CaptureResult.CONTROL_AE_STATE_PRECAPTURE){ try { mStillBuilder = mCameraDevice.createCaptureRequest(CameraDevice.TEMPLATE_STILL_CAPTURE); mStillBuilder.set(CaptureRequest.CONTROL_CAPTURE_INTENT, CaptureRequest.CONTROL_CAPTURE_INTENT_STILL_CAPTURE); // 把AE关掉，通过手动的方式控制AE mStillBuilder.set(CaptureRequest.CONTROL_AE_MODE, CameraMetadata.CONTROL_AE_MODE_OFF); mStillBuilder.set(CaptureRequest.FLASH_MODE, CameraMetadata.FLASH_MODE_TORCH); // just in case mStillBuilder.addTarget(mImageSurface); CaptureRequest captureRequest = mStillBuilder.build(); List requests = new ArrayList(); Range iso_range = mCharacteristics.get(CameraCharacteristics.SENSOR_INFO_SENSITIVITY_RANGE); // may be null on some devices int iso = 800; // see https://sourceforge.net/p/opencamera/tickets/321/ - some devices may have auto ISO that's // outside of the allowed manual iso range! iso = Math.max(iso, iso_range.getLower()); iso = Math.min(iso, iso_range.getUpper()); mStillBuilder.set(CaptureRequest.SENSOR_SENSITIVITY, iso ); mStillBuilder.set(CaptureRequest.SENSOR_FRAME_DURATION, 1000000000L/30); int n_half_images = 3/2; long base_exposure_time = 22222000; long min_exposure_time = base_exposure_time; long max_exposure_time = base_exposure_time; float expo_bracketing_stops = 2.0f; final double scale = Math.pow(2.0, expo_bracketing_stops/(double)n_half_images); Range exposure_time_range = mCharacteristics.get(CameraCharacteristics.SENSOR_INFO_EXPOSURE_TIME_RANGE); // may be null on some devices if( exposure_time_range != null ) { min_exposure_time = exposure_time_range.getLower(); max_exposure_time = exposure_time_range.getUpper(); } // darker images for(int i=0;i double this_scale = scale; for(int j=i;j double this_scale = scale; for(int j=0;j max_exposure_time ) exposure_time = max_exposure_time; mStillBuilder.setTag(new String("lighter images")); mStillBuilder.set(CaptureRequest.SENSOR_EXPOSURE_TIME, exposure_time); Log.e("TAG", " 1111111111111 "); requests.add( mStillBuilder.build() ); } } Log.e("TAG", "n_half_images = "+n_half_images ); Log.e("666666", "scale = "+scale +" exposure_time = "+(scale * base_exposure_time)+" base_exposure_time = "+base_exposure_time); // mCaptureSession.stopRepeating(); mCaptureSession.captureBurst(requests, null, null); } catch (CameraAccessException e) { e.printStackTrace(); } } super.onCaptureCompleted(session, request, result); } }

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