[2/4]解决USB摄像头打开相机预览界面绿屏

liyujie

2025-08-28 d9927380ed7c8366f762049be9f3fee225860833

 android/hardware/aw/camera/3_4/v4l2_stream.h
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@@ -67,7 +67,9 @@
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   // to "new V4L2Stream", except that it may return nullptr in case of failure.
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   static V4L2Stream* NewV4L2Stream(const int id,
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                                    const std::string device_path,
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-                                   std::shared_ptr<CCameraConfig> pCameraCfg);
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+                                   std::shared_ptr<CCameraConfig> pCameraCfg,
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+                                   int merge_status
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+                                   );
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   virtual ~V4L2Stream();
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   // Turn the stream on or off.
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@@ -91,7 +93,7 @@
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   virtual int SetAutoFocusRegions(cam_rect_t cam_regions);
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   virtual int SetCropRect(cam_crop_rect_t cam_crop_rect);
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   virtual int SetJpegCropRect(cam_crop_rect_t cam_crop_rect);
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-  virtual int SetParm(int mCapturemode);
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+  virtual int SetParm(int mCapturemode, uint32_t width, uint32_t height);
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   // Manage format.
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   virtual int GetFormats(std::set<uint32_t>* v4l2_formats);
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   virtual int GetFormatFrameSizes(uint32_t v4l2_format,
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@@ -104,7 +106,7 @@
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       const std::array<int32_t, 2>& size,
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       std::array<int64_t, 2>* duration_range);
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   virtual int SetFormat(const StreamFormat& desired_format,
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-                        uint32_t* result_max_buffers);
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+                        uint32_t* result_max_buffers, bool merge_stream_flag);
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   // Manage buffers.
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   virtual int PrepareBuffer();
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   virtual int WaitCameraReady();
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@@ -132,11 +134,13 @@
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   // Use NewV4L2Stream instead.
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   V4L2Stream(const int id,
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              const std::string device_path,
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-             std::shared_ptr<CCameraConfig> pCameraCfg);
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+             std::shared_ptr<CCameraConfig> pCameraCfg,
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+             int merge_status
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+             );
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   // Connect or disconnect to the device. Access by creating/destroying
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   // a V4L2Wrapper::Connection object.
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-  int Connect();
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+  int Connect(int merge_status);
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   void Disconnect();
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   // Perform an ioctl call in a thread-safe fashion.
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   template <typename T>
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@@ -167,6 +171,12 @@
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   epoll_event *pEvents;
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   // The open camera facing.
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   const int device_id_;
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+
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+  int reduce_call_num;
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+  uint32_t reducecallnum_dst_width;
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+  uint32_t reducecallnum_dst_height;
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+  uint32_t reducecallnum_src_width;
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+  uint32_t reducecallnum_src_height;
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   // Whether or not the device supports the extended control query.
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   bool extended_query_supported_;
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@@ -257,9 +267,9 @@
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 class ConnectionStream {
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   friend class V4L2Stream;
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  public:
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-  explicit ConnectionStream(std::shared_ptr<V4L2Stream> device)
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+  ConnectionStream(std::shared_ptr<V4L2Stream> device, int merge_status)
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       : device_(std::move(device)) {
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-      connect_result_ = device_->Connect();
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+      connect_result_ = device_->Connect(merge_status);
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   }
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   ~ConnectionStream() {
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     if (connect_result_ == 0) {