Add camera metering mode API. (f7f63338) · Commits · e / os / android_frameworks_base

core/java/android/hardware/Camera.java

+60 −0

Original line number	Diff line number	Diff line
		@@ -763,6 +763,7 @@ public class Camera {
		private static final String KEY_ZOOM_SUPPORTED = "zoom-supported";
		private static final String KEY_SMOOTH_ZOOM_SUPPORTED = "smooth-zoom-supported";
		private static final String KEY_FOCUS_DISTANCES = "focus-distances";
		private static final String KEY_METERING_MODE = "metering-mode";

		// Parameter key suffix for supported values.
		private static final String SUPPORTED_VALUES_SUFFIX = "-values";
		@@ -965,6 +966,26 @@ public class Camera {
		*/
		public static final String FOCUS_MODE_CONTINUOUS = "continuous";

		/**
		* The camera determines the exposure by giving more weight to the
		* central part of the scene.
		* @hide
		*/
		public static final String METERING_MODE_CENTER_WEIGHTED = "center-weighted";

		/**
		* The camera determines the exposure by averaging the entire scene,
		* giving no weighting to any particular area.
		* @hide
		*/
		public static final String METERING_MODE_FRAME_AVERAGE = "frame-average";

		/**
		* The camera determines the exposure by a very small area of the scene,
		* typically the center.
		* @hide
		*/
		public static final String METERING_MODE_SPOT = "spot";

		// Formats for setPreviewFormat and setPictureFormat.
		private static final String PIXEL_FORMAT_YUV422SP = "yuv422sp";
		@@ -1930,6 +1951,45 @@ public class Camera {
		output[2] = distances.get(2);
		}

		/**
		* Gets the supported metering modes.
		*
		* @return a list of supported metering modes. null if metering mode
		* setting is not supported.
		* @see #getMeteringMode()
		* @hide
		*/
		public List<String> getSupportedMeteringModes() {
		String str = get(KEY_METERING_MODE + SUPPORTED_VALUES_SUFFIX);
		return split(str);
		}

		/**
		* Gets the current metering mode, which affects how camera determines
		* exposure.
		*
		* @return current metering mode. If the camera does not support
		* metering setting, this should return null.
		* @see #METERING_MODE_CENTER_WEIGHTED
		* @see #METERING_MODE_FRAME_AVERAGE
		* @see #METERING_MODE_SPOT
		* @hide
		*/
		public String getMeteringMode() {
		return get(KEY_METERING_MODE);
		}

		/**
		* Sets the metering mode.
		*
		* @param value metering mode.
		* @see #getMeteringMode()
		* @hide
		*/
		public void setMeteringMode(String value) {
		set(KEY_METERING_MODE, value);
		}

		// Splits a comma delimited string to an ArrayList of String.
		// Return null if the passing string is null or the size is 0.
		private ArrayList<String> split(String str) {

include/camera/CameraParameters.h

+13 −0

Original line number	Diff line number	Diff line
		@@ -250,6 +250,10 @@ public:
		// Example value: "yuv420sp" or PIXEL_FORMAT_XXX constants. Read only.
		static const char KEY_VIDEO_FRAME_FORMAT[];

		// Metering mode. This affects how camera determines exposure.
		// Example value: "spot" or METERING_MODE_XXX constants. Read/write.
		static const char KEY_METERING_MODE[];

		// Value for KEY_ZOOM_SUPPORTED or KEY_SMOOTH_ZOOM_SUPPORTED.
		static const char TRUE[];

		@@ -347,6 +351,15 @@ public:
		// callback will be only called once as soon as the picture is in focus.
		static const char FOCUS_MODE_CONTINUOUS[];

		// The camera determines the exposure by giving more weight to the
		// central part of the scene.
		static const char METERING_MODE_CENTER_WEIGHTED[];
		// The camera determines the exposure by averaging the entire scene,
		// giving no weighting to any particular area.
		static const char METERING_MODE_FRAME_AVERAGE[];
		// The camera determines the exposure by a very small area of the scene,
		// typically the center.
		static const char METERING_MODE_SPOT[];

		private:
		DefaultKeyedVector<String8,String8> mMap;

libs/camera/CameraParameters.cpp

+6 −0

Original line number	Diff line number	Diff line
		@@ -71,6 +71,7 @@ const char CameraParameters::KEY_ZOOM_SUPPORTED[] = "zoom-supported";
		const char CameraParameters::KEY_SMOOTH_ZOOM_SUPPORTED[] = "smooth-zoom-supported";
		const char CameraParameters::KEY_FOCUS_DISTANCES[] = "focus-distances";
		const char CameraParameters::KEY_VIDEO_FRAME_FORMAT[] = "video-frame-format";
		const char CameraParameters::KEY_METERING_MODE[] = "metering-mode";

		const char CameraParameters::TRUE[] = "true";
		const char CameraParameters::FOCUS_DISTANCE_INFINITY[] = "Infinity";
		@@ -142,6 +143,11 @@ const char CameraParameters::FOCUS_MODE_FIXED[] = "fixed";
		const char CameraParameters::FOCUS_MODE_EDOF[] = "edof";
		const char CameraParameters::FOCUS_MODE_CONTINUOUS[] = "continuous";

		// Values for metering mode settings.
		const char METERING_MODE_CENTER_WEIGHTED[] = "center-weighted";
		const char METERING_MODE_FRAME_AVERAGE[] = "frame-average";
		const char METERING_MODE_SPOT[] = "spot";

		CameraParameters::CameraParameters()
		: mMap()
		{