[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_camera_hal.cpp
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@@ -31,6 +31,8 @@
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 #include <memory>
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 #include <string>
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 #include <unordered_set>
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+#include <iostream>
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+#include <sstream>
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 #include "camera_config.h"
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 #include "v4l2_camera.h"
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@@ -68,6 +70,12 @@
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     HAL_LOGE("Cannot found video node %s. %s", dev_node, strerror(errno));
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   }
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+  hal_merge_stream_flag = false;
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+  char * 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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   // id == 0 camera facing back;
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   // id == 1 camera facing front;
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@@ -83,7 +91,25 @@
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       config->initParameters();
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       config->dumpParameters();
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     }
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-    V4L2Camera* cam(V4L2Camera::NewV4L2Camera(id, config));
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+    mCameraConfig.push_back(config);
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+
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+    s_value = config->supportPictureSizeValue();
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+    std::string st1 = s_value;
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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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+            hal_merge_stream_flag = true;
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+        }
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+    }
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+
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+    V4L2Camera* cam(V4L2Camera::NewV4L2Camera(id,
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+                                              config,
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+                                              hal_merge_stream_flag));
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     if (cam) {
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       mCameras.push_back(cam);
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     } else {