[3/4]解决USB摄像头打开相机预览界面绿屏

liyujie

2025-08-28 867b8b7b729282c7e14e200ca277435329ebe747

 android/hardware/interfaces/camera/device/3.4/default/ExternalCameraUtils.cpp
old mode 100755new mode 100644
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@@ -164,6 +164,7 @@
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     const int kDefaultNumStillBuffer = 2;
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     const int kDefaultOrientation = 0; // suitable for natural landscape displays like tablet/TV
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                                        // For phone devices 270 is better
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+    const int kDefaultJpegOrientation = 0;
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 } // anonymous namespace
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 const char* ExternalCameraConfig::kDefaultCfgPath = "/vendor/etc/external_camera_config.xml";
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@@ -284,10 +285,19 @@
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         ret.orientation = orientation->IntAttribute("degree", /*Default*/kDefaultOrientation);
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     }
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+    XMLElement *jpegOrientation = deviceCfg->FirstChildElement("JpegOrientation");
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+    if (jpegOrientation == nullptr) {
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+        ALOGI("%s: no jpeg orientation specified", __FUNCTION__);
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+    } else {
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+        ret.jpegOrientation = jpegOrientation->IntAttribute("degree",
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+            /*Default*/kDefaultJpegOrientation);
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+    }
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+
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     ALOGI("%s: external camera cfg loaded: maxJpgBufSize %d,"
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-            " num video buffers %d, num still buffers %d, orientation %d",
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+            " num video buffers %d, num still buffers %d, orientation %d jpeg orientation %d",
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             __FUNCTION__, ret.maxJpegBufSize,
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-            ret.numVideoBuffers, ret.numStillBuffers, ret.orientation);
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+            ret.numVideoBuffers, ret.numStillBuffers,
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+            ret.orientation, ret.jpegOrientation);
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     for (const auto& limit : ret.fpsLimits) {
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         ALOGI("%s: fpsLimitList: %dx%d@%f", __FUNCTION__,
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                 limit.size.width, limit.size.height, limit.fpsUpperBound);