找一个最接近的分辨率拍照

记录照片的参数

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

@@ -184,6 +184,10 @@ int NdkCamera::open(const std::string& cameraId) {
                 // DisplayDimension foundRes(4000, 4000);
                 // DisplayDimension maxJPG(0, 0);
 
+                unsigned long long minRatio = -1;
+                DisplayDimension temp;
+                unsigned long long pixels = (unsigned long long)mWidth * mHeight;
+
                 for (int i = 0; i < e.count; i += 4)
                 {
                     int32_t input = e.data.i32[i + 3];
@@ -193,7 +197,17 @@ int NdkCamera::open(const std::string& cameraId) {
                     if (format == AIMAGE_FORMAT_YUV_420_888 || format == AIMAGE_FORMAT_JPEG)
                     {
                         DisplayDimension res(e.data.i32[i + 1], e.data.i32[i + 2]);
-                        if (!disp.IsSameRatio(res)) continue;
+                        if (!disp.IsSameRatio(res))
+                        {
+                            unsigned long long ps = res.width() * res.height();
+                            unsigned long long ratio = (ps >= pixels) ? (ps - pixels) : (pixels - ps);
+                            if (ratio < minRatio)
+                            {
+                                temp = res;
+                                minRatio = ratio;
+                            }
+                            continue;
+                        }
 
                         if (format == AIMAGE_FORMAT_YUV_420_888 && res > disp)
                         {
@@ -204,6 +218,12 @@ int NdkCamera::open(const std::string& cameraId) {
                         }*/
                     }
                 }
+
+                if (!foundIt)
+                {
+                    foundRes = temp;
+                    foundIt = true;
+                }
             }
 
             {
@@ -723,15 +743,21 @@ void NdkCamera::onCaptureCompleted(ACameraCaptureSession* session, ACaptureReque
         }
     }
 
+    if (m_imagesCaptured != 0)
+    {
+        return;
+    }
+
     val = { 0 };
     status = ACameraMetadata_getConstEntry(result, ACAMERA_SENSOR_EXPOSURE_TIME, &val);
     int64_t exTime = (status == ACAMERA_OK) ? val.data.i64[0] : -1;
+    mResult.exposureTime = exTime;
 
     val = { 0 };
     status = ACameraMetadata_getConstEntry(result, ACAMERA_CONTROL_AE_MODE, &val);
     uint8_t aeMode = (status == ACAMERA_OK) ? val.data.u8[0] : 0;
     // ACaptureRequest_setEntry_i32(capture_request, ACAMERA_SENSOR_SENSITIVITY, 1, &sensitivity_);
-
+    mResult.autoExposure = aeMode;
 
     val = { 0 };
     float focusDistance = NAN;
@@ -743,6 +769,15 @@ void NdkCamera::onCaptureCompleted(ACameraCaptureSession* session, ACaptureReque
             focusDistance = *val.data.f;
         }
     }
+    mResult.FocusDistance = focusDistance;
+
+    val = {0};
+    status = ACameraMetadata_getConstEntry(result, ACAMERA_SENSOR_SENSITIVITY, &val);
+    mResult.sensitibity = *(val.data.i32);
+
+    val = {0};
+    status = ACameraMetadata_getConstEntry(result, ACAMERA_CONTROL_SCENE_MODE, &val);
+    mResult.hdrMode = (*(val.data.u8) == ACAMERA_CONTROL_SCENE_MODE_HDR) ? 1 : 0;
 
     ALOGD("onCaptureCompleted EXPOSURE_TIME=%lld, FocusDis=%f camera id=%s, AE=%s AF_STATE=%u", exTime, focusDistance, mCameraId.c_str(), ((aeMode == 1) ? "ON" : "OFF"), afState);
 

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

@@ -50,11 +50,13 @@ public:
 
     struct CAPTURE_RESULT
     {
-        unsigned char autoFocus;
+        uint8_t autoFocus;
-        unsigned char autoExposure;
+        uint8_t autoExposure;
-        unsigned long exposureTime;
+        int64_t exposureTime;
         float FocusDistance;
-        unsigned int sensitibity;
+        int32_t sensitibity;
+        uint8_t hdrMode;
+
     };
 
     NdkCamera(int32_t width, int32_t height, const CAMERA_PARAMS& params);
@@ -71,6 +73,12 @@ public:
 
     void onCaptureCompleted(ACameraCaptureSession* session, ACaptureRequest* request, const ACameraMetadata* result);
 
+    const CAPTURE_RESULT& getCaptureResult() const
+    {
+        return mResult;
+    }
+
+
 public:
     CAMERA_PARAMS m_params;
     int camera_facing;