[libcamera-devel] [PATCH 5/6] android: camera_device: Load make and model from platform settings

[Paul Elder]

In ChromeOS the camera make and model is saved in
/var/cache/camera/camera.prop. Load and save these values at
construction time, if available.

Signed-off-by: Paul Elder <paul.elder at ideasonboard.com>
---
 src/android/camera_device.cpp | 30 ++++++++++++++++++++++++++++++
 src/android/camera_device.h   |  5 +++++
 2 files changed, 35 insertions(+)

diff --git a/src/android/camera_device.cpp b/src/android/camera_device.cpp
index d2a8e876..ed47c7cd 100644
--- a/src/android/camera_device.cpp
+++ b/src/android/camera_device.cpp
@@ -18,6 +18,7 @@
 #include <libcamera/formats.h>
 #include <libcamera/property_ids.h>
 
+#include "libcamera/internal/file.h"
 #include "libcamera/internal/formats.h"
 #include "libcamera/internal/log.h"
 #include "libcamera/internal/utils.h"
@@ -344,6 +345,35 @@ CameraDevice::CameraDevice(unsigned int id, const std::shared_ptr<Camera> &camer
 	 *  streamConfiguration.
 	 */
 	maxJpegBufferSize_ = 13 << 20; /* 13631488 from USB HAL */
+
+	cameraMake_ = "libcamera";
+	cameraModel_ = "cameraModel";
+
+	File prop("/var/cache/camera/camera.prop");
+	if (!prop.open(File::ReadOnly))
+		return;
+
+	size_t fileSize = prop.size();
+	if (fileSize <= 0)
+		return;
+
+	std::vector<uint8_t> buf(fileSize);
+	if (prop.read(buf) < 0)
+		return;
+
+	std::string fileContents(buf.begin(), buf.end());
+	for (const auto &line : utils::split(fileContents, "\n")) {
+		off_t delimPos = line.find("=");
+		if (delimPos == std::string::npos)
+			continue;
+		std::string key = line.substr(0, delimPos);
+		std::string val = line.substr(delimPos + 1, line.size());
+
+		if (!key.compare("ro.product.model"))
+			cameraModel_ = val;
+		if (!key.compare("ro.product.manufacturer"))
+			cameraMake_ = val;
+	}
 }
 
 CameraDevice::~CameraDevice()
diff --git a/src/android/camera_device.h b/src/android/camera_device.h
index 0874c80f..a285d0a1 100644
--- a/src/android/camera_device.h
+++ b/src/android/camera_device.h
@@ -56,6 +56,8 @@ public:
 		return config_.get();
 	}
 
+	const std::string &cameraMake() const { return cameraMake_; }
+	const std::string &cameraModel() const { return cameraModel_; }
 	int facing() const { return facing_; }
 	int orientation() const { return orientation_; }
 	unsigned int maxJpegBufferSize() const { return maxJpegBufferSize_; }
@@ -127,6 +129,9 @@ private:
 	std::map<int, libcamera::PixelFormat> formatsMap_;
 	std::vector<CameraStream> streams_;
 
+	std::string cameraMake_;
+	std::string cameraModel_;
+
 	int facing_;
 	int orientation_;
 
-- 
2.27.0