1 /*
2  * Copyright (C) 2020 The Android Open Source Project
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  *      http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16 
17 #ifndef HARDWARE_GOOGLE_CAMERA_HAL_UTILS_ZOOM_RATIO_MAPPER_H_
18 #define HARDWARE_GOOGLE_CAMERA_HAL_UTILS_ZOOM_RATIO_MAPPER_H_
19 
20 #include "hal_types.h"
21 #include "zoom_ratio_mapper_hwl.h"
22 
23 namespace android {
24 namespace google_camera_hal {
25 
26 class ZoomRatioMapper {
27  public:
28   struct InitParams {
29     Dimension active_array_dimension;
30     std::unordered_map<uint32_t, Dimension> physical_cam_active_array_dimension;
31     ZoomRatioRange zoom_ratio_range;
32     std::unique_ptr<ZoomRatioMapperHwl> zoom_ratio_mapper_hwl;
33   };
34 
35   void Initialize(InitParams* params);
36 
37   // Apply zoom ratio to capture request
38   void UpdateCaptureRequest(CaptureRequest* request);
39 
40   // Apply zoom ratio to capture result
41   void UpdateCaptureResult(CaptureResult* result);
42 
43  private:
44   // Apply zoom ratio to the capture request or result.
45   void ApplyZoomRatio(const Dimension& active_array_dimension,
46                       const bool is_request, HalCameraMetadata* metadata);
47 
48   // Update rect region with respect to zoom ratio and active array
49   // dimension.
50   void UpdateRects(float zoom_ratio, const uint32_t tag_id,
51                    const Dimension& active_array_dimension,
52                    const bool is_request, HalCameraMetadata* metadata);
53 
54   // Update weighted rect regions with respect to zoom ratio and active array
55   // dimension.
56   void UpdateWeightedRects(float zoom_ratio, const uint32_t tag_id,
57                            const Dimension& active_array_dimension,
58                            const bool is_request, HalCameraMetadata* metadata);
59 
60   // Update point position with respect to zoom ratio and active array
61   // dimension.
62   void UpdatePoints(float zoom_ratio, const uint32_t tag_id,
63                     const Dimension& active_array_dimension,
64                     HalCameraMetadata* metadata);
65 
66   // Active array dimension of logical camera.
67   Dimension active_array_dimension_;
68 
69   // Active array dimension of physical camera.
70   std::unordered_map<uint32_t, Dimension> physical_cam_active_array_dimension_;
71 
72   // Zoom ratio range.
73   ZoomRatioRange zoom_ratio_range_;
74 
75   // Indicate whether zoom ratio is supported.
76   bool is_zoom_ratio_supported_ = false;
77 
78   std::unique_ptr<ZoomRatioMapperHwl> zoom_ratio_mapper_hwl_;
79 };
80 
81 }  // namespace google_camera_hal
82 }  // namespace android
83 
84 #endif  // HARDWARE_GOOGLE_CAMERA_HAL_UTILS_ZOOM_RATIO_MAPPER_H_
85