[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_metadata_factory.cpp
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@@ -16,7 +16,9 @@
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 #include "v4l2_metadata_factory.h"
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+#include <iostream>
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 #include <map>
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+#include <sstream>
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 #include <utility>
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 #include <vector>
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@@ -52,8 +54,32 @@
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   // but doing it here prevents connecting and disconnecting for each one).
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   gdevice = device;
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+  char * s_value;
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+  s_value = pCameraCfg->supportPictureSizeValue();
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+  int merge_status = 0;
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+
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+  std::string st1 = s_value;
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+  int pic_width = 0;
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+  int pic_height = 0;
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+  std::string tmp;
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+  std::vector<std::string> s_data;
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+  std::stringstream input(st1);
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+
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+  while (getline(input, tmp, ',')) {
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+      s_data.push_back(tmp);
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+  }
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+  for (auto s : s_data) {
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+      sscanf(s.c_str(), "%dx%d", &pic_width,&pic_height);
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+      if (pic_width * pic_height > 4000*3000) {
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+          merge_status = 1;
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+      }
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+  }
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+
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+  //V4L2Wrapper::Connection temp_connection =
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+  //    V4L2Wrapper::Connection(device, MAIN_STREAM);
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   V4L2Wrapper::Connection temp_connection =
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-      V4L2Wrapper::Connection(device, MAIN_STREAM);
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+      V4L2Wrapper::Connection(device, MAIN_STREAM, merge_status);
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+
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   if (temp_connection.status()) {
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     HAL_LOGE("Failed to connect to device: %d.", temp_connection.status());
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     return temp_connection.status();