停止拍照后等待一段时间，确保session停止

app/src/main/cpp/camera2/ndkcamera.cpp

@@ -226,6 +226,7 @@ NdkCamera::NdkCamera(int32_t width, int32_t height, const NdkCamera::CAMERA_PARA
 
 NdkCamera::~NdkCamera()
 {
+    XYLOG(XYLOG_SEVERITY_DEBUG, "NdkCamera::~NdkCamera %s", mCameraId.c_str());
 	close();
 }
 
@@ -1000,6 +1001,8 @@ void NdkCamera::close()
 	}
 	 */
 
+	mPreviewResults.reset();
+	mCaptureResults.clear();
 	mCaptureFrames.clear();
 
 	if ((ACameraManager *)camera_manager != NULL)
@@ -1009,7 +1012,8 @@ void NdkCamera::close()
 
 	if (capture_session)
 	{
-		// res = ACameraCaptureSession_stopRepeating(capture_session);
+		res = ACameraCaptureSession_stopRepeating(capture_session);
+        std::this_thread::sleep_for(std::chrono::milliseconds(512));
 		ACameraCaptureSession_close(capture_session);
 		capture_session = 0;
 	}
@@ -1051,11 +1055,24 @@ void NdkCamera::close()
 
 	if (mPreviewImageReader != NULL)
 	{
+#ifdef _DEBUG
+		ALOGD("Will Free mPreviewImageReader");
+#endif
+        AImage* image = NULL;
+        media_status_t mstatus;
+        while ((mstatus = AImageReader_acquireNextImage(mPreviewImageReader, &image)) == AMEDIA_OK)
+		{
+            AImage_delete(image);
+            image = NULL;
+        }
 		AImageReader_setImageListener(mPreviewImageReader, NULL);
 		//XYLOG(XYLOG_SEVERITY_DEBUG, "CameraStatus::AImageReader_delete %s", mCameraId.c_str());
 		AImageReader_delete(mPreviewImageReader);
 		//XYLOG(XYLOG_SEVERITY_DEBUG, "CameraStatus::End AImageReader_delete %s", mCameraId.c_str());
 		mPreviewImageReader = 0;
+#ifdef _DEBUG
+		ALOGD("After Free mPreviewImageReader");
+#endif
 	}
 
 	if (mOutputTarget != NULL)
@@ -1072,9 +1089,13 @@ void NdkCamera::close()
 
 	if (mImageReader != NULL)
 	{
+#ifdef _DEBUG
+		ALOGD("Will Free mImageReader");
+#endif
 		AImage* image = NULL;
-		int32_t status;
-		while ((status = AImageReader_acquireNextImage(mImageReader, &image)) == AMEDIA_OK) {
+		media_status_t mstatus;
+		while ((mstatus = AImageReader_acquireNextImage(mImageReader, &image)) == AMEDIA_OK)
+		{
 			AImage_delete(image);
 			image = NULL;
 		}
@@ -1085,6 +1106,9 @@ void NdkCamera::close()
 
 		//XYLOG(XYLOG_SEVERITY_DEBUG, "CameraStatus::End AImageReader_delete %s", mCameraId.c_str());
 		mImageReader = 0;
+#ifdef _DEBUG
+		ALOGD("After Free mImageReader");
+#endif
 	}
     if (mOutputTarget2 != NULL)
     {
@@ -1318,6 +1342,7 @@ void NdkCamera::onImageAvailable(AImageReader* reader)
 			if (captureCompleted && captureDispatchable)
 			{
 				XYLOG(XYLOG_SEVERITY_INFO,"onOneCapture from onImageAvailable");
+                camera_status_t status = ACameraCaptureSession_stopRepeating(capture_session);
 				onOneCapture(mCharacteristics, result, mFinalLdr, ts - m_startTime, mOneFrame);
 			}
 		}
@@ -1798,6 +1823,7 @@ void NdkCamera::onCaptureCompleted(ACameraCaptureSession* session, ACaptureReque
 			if (captureCompleted && captureDispatchable)
 			{
 				XYLOG(XYLOG_SEVERITY_INFO,"onOneCapture from onCaptureCompleted");
+                camera_status_t status = ACameraCaptureSession_stopRepeating(capture_session);
 				onOneCapture(mCharacteristics, captureResult, mFinalLdr, ts - m_startTime, mOneFrame);
 			}
 		}
@@ -1824,6 +1850,8 @@ void NdkCamera::onCaptureCompleted(ACameraCaptureSession* session, ACaptureReque
 
 void NdkCamera::FireBurstCapture()
 {
+    camera_status_t status = ACameraCaptureSession_stopRepeating(capture_session);
+
     unsigned long long ts = GetMicroTimeStamp();
 
     size_t expectedTimes = mCaptureRequests.size() - 1;

app/src/main/cpp/camera2/ndkcamera.h

@@ -268,6 +268,8 @@ protected:
     std::shared_ptr<ACameraMetadata> mCharacteristics;
     std::vector<CaptureRequest*> mCaptureRequests;
 
+    ACameraCaptureSession* capture_session;
+
     std::shared_ptr<ACameraMetadata> mPreviewResults;
     std::vector<std::shared_ptr<ACameraMetadata> > mCaptureResults;
     uint32_t mLdr;
@@ -279,8 +281,6 @@ protected:
     cv::Mat mOneFrame;
     std::vector<std::vector<uint8_t> >  mRawFrames;
 
-    ACameraCaptureSession* capture_session;
-
     // AImageReader* image_reader;
     // ANativeWindow* image_reader_surface;
     // ACameraOutputTarget* image_reader_target;