| /* |
| * Copyright (C) 2013 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package android.hardware.camera2.impl; |
| |
| import android.graphics.ImageFormat; |
| import android.graphics.Point; |
| import android.graphics.Rect; |
| import android.hardware.camera2.CameraCharacteristics; |
| import android.hardware.camera2.CameraMetadata; |
| import android.hardware.camera2.CaptureResult; |
| import android.hardware.camera2.Face; |
| import android.hardware.camera2.Rational; |
| import android.os.Parcelable; |
| import android.os.Parcel; |
| import android.util.Log; |
| |
| import java.lang.reflect.Array; |
| import java.nio.ByteBuffer; |
| import java.nio.ByteOrder; |
| import java.util.ArrayList; |
| import java.util.HashMap; |
| |
| /** |
| * Implementation of camera metadata marshal/unmarshal across Binder to |
| * the camera service |
| */ |
| public class CameraMetadataNative extends CameraMetadata implements Parcelable { |
| |
| private static final String TAG = "CameraMetadataJV"; |
| private static final boolean VERBOSE = Log.isLoggable(TAG, Log.VERBOSE); |
| // this should be in sync with HAL_PIXEL_FORMAT_BLOB defined in graphics.h |
| private static final int NATIVE_JPEG_FORMAT = 0x21; |
| |
| public CameraMetadataNative() { |
| super(); |
| mMetadataPtr = nativeAllocate(); |
| if (mMetadataPtr == 0) { |
| throw new OutOfMemoryError("Failed to allocate native CameraMetadata"); |
| } |
| } |
| |
| /** |
| * Copy constructor - clone metadata |
| */ |
| public CameraMetadataNative(CameraMetadataNative other) { |
| super(); |
| mMetadataPtr = nativeAllocateCopy(other); |
| if (mMetadataPtr == 0) { |
| throw new OutOfMemoryError("Failed to allocate native CameraMetadata"); |
| } |
| } |
| |
| public static final Parcelable.Creator<CameraMetadataNative> CREATOR = |
| new Parcelable.Creator<CameraMetadataNative>() { |
| @Override |
| public CameraMetadataNative createFromParcel(Parcel in) { |
| CameraMetadataNative metadata = new CameraMetadataNative(); |
| metadata.readFromParcel(in); |
| return metadata; |
| } |
| |
| @Override |
| public CameraMetadataNative[] newArray(int size) { |
| return new CameraMetadataNative[size]; |
| } |
| }; |
| |
| @Override |
| public int describeContents() { |
| return 0; |
| } |
| |
| @Override |
| public void writeToParcel(Parcel dest, int flags) { |
| nativeWriteToParcel(dest); |
| } |
| |
| @SuppressWarnings("unchecked") |
| @Override |
| public <T> T get(Key<T> key) { |
| T value = getOverride(key); |
| if (value != null) { |
| return value; |
| } |
| |
| return getBase(key); |
| } |
| |
| public void readFromParcel(Parcel in) { |
| nativeReadFromParcel(in); |
| } |
| |
| /** |
| * Set a camera metadata field to a value. The field definitions can be |
| * found in {@link CameraCharacteristics}, {@link CaptureResult}, and |
| * {@link CaptureRequest}. |
| * |
| * @param key The metadata field to write. |
| * @param value The value to set the field to, which must be of a matching |
| * type to the key. |
| */ |
| public <T> void set(Key<T> key, T value) { |
| if (setOverride(key, value)) { |
| return; |
| } |
| |
| setBase(key, value); |
| } |
| |
| // Keep up-to-date with camera_metadata.h |
| /** |
| * @hide |
| */ |
| public static final int TYPE_BYTE = 0; |
| /** |
| * @hide |
| */ |
| public static final int TYPE_INT32 = 1; |
| /** |
| * @hide |
| */ |
| public static final int TYPE_FLOAT = 2; |
| /** |
| * @hide |
| */ |
| public static final int TYPE_INT64 = 3; |
| /** |
| * @hide |
| */ |
| public static final int TYPE_DOUBLE = 4; |
| /** |
| * @hide |
| */ |
| public static final int TYPE_RATIONAL = 5; |
| /** |
| * @hide |
| */ |
| public static final int NUM_TYPES = 6; |
| |
| private void close() { |
| // this sets mMetadataPtr to 0 |
| nativeClose(); |
| mMetadataPtr = 0; // set it to 0 again to prevent eclipse from making this field final |
| } |
| |
| private static int getTypeSize(int nativeType) { |
| switch(nativeType) { |
| case TYPE_BYTE: |
| return 1; |
| case TYPE_INT32: |
| case TYPE_FLOAT: |
| return 4; |
| case TYPE_INT64: |
| case TYPE_DOUBLE: |
| case TYPE_RATIONAL: |
| return 8; |
| } |
| |
| throw new UnsupportedOperationException("Unknown type, can't get size " |
| + nativeType); |
| } |
| |
| private static Class<?> getExpectedType(int nativeType) { |
| switch(nativeType) { |
| case TYPE_BYTE: |
| return Byte.TYPE; |
| case TYPE_INT32: |
| return Integer.TYPE; |
| case TYPE_FLOAT: |
| return Float.TYPE; |
| case TYPE_INT64: |
| return Long.TYPE; |
| case TYPE_DOUBLE: |
| return Double.TYPE; |
| case TYPE_RATIONAL: |
| return Rational.class; |
| } |
| |
| throw new UnsupportedOperationException("Unknown type, can't map to Java type " |
| + nativeType); |
| } |
| |
| @SuppressWarnings("unchecked") |
| private static <T> int packSingleNative(T value, ByteBuffer buffer, Class<T> type, |
| int nativeType, boolean sizeOnly) { |
| |
| if (!sizeOnly) { |
| /** |
| * Rewrite types when the native type doesn't match the managed type |
| * - Boolean -> Byte |
| * - Integer -> Byte |
| */ |
| |
| if (nativeType == TYPE_BYTE && type == Boolean.TYPE) { |
| // Since a boolean can't be cast to byte, and we don't want to use putBoolean |
| boolean asBool = (Boolean) value; |
| byte asByte = (byte) (asBool ? 1 : 0); |
| value = (T) (Byte) asByte; |
| } else if (nativeType == TYPE_BYTE && type == Integer.TYPE) { |
| int asInt = (Integer) value; |
| byte asByte = (byte) asInt; |
| value = (T) (Byte) asByte; |
| } else if (type != getExpectedType(nativeType)) { |
| throw new UnsupportedOperationException("Tried to pack a type of " + type + |
| " but we expected the type to be " + getExpectedType(nativeType)); |
| } |
| |
| if (nativeType == TYPE_BYTE) { |
| buffer.put((Byte) value); |
| } else if (nativeType == TYPE_INT32) { |
| buffer.putInt((Integer) value); |
| } else if (nativeType == TYPE_FLOAT) { |
| buffer.putFloat((Float) value); |
| } else if (nativeType == TYPE_INT64) { |
| buffer.putLong((Long) value); |
| } else if (nativeType == TYPE_DOUBLE) { |
| buffer.putDouble((Double) value); |
| } else if (nativeType == TYPE_RATIONAL) { |
| Rational r = (Rational) value; |
| buffer.putInt(r.getNumerator()); |
| buffer.putInt(r.getDenominator()); |
| } |
| |
| } |
| |
| return getTypeSize(nativeType); |
| } |
| |
| @SuppressWarnings({"unchecked", "rawtypes"}) |
| private static <T> int packSingle(T value, ByteBuffer buffer, Class<T> type, int nativeType, |
| boolean sizeOnly) { |
| |
| int size = 0; |
| |
| if (type.isPrimitive() || type == Rational.class) { |
| size = packSingleNative(value, buffer, type, nativeType, sizeOnly); |
| } else if (type.isEnum()) { |
| size = packEnum((Enum)value, buffer, (Class<Enum>)type, nativeType, sizeOnly); |
| } else if (type.isArray()) { |
| size = packArray(value, buffer, type, nativeType, sizeOnly); |
| } else { |
| size = packClass(value, buffer, type, nativeType, sizeOnly); |
| } |
| |
| return size; |
| } |
| |
| private static <T extends Enum<T>> int packEnum(T value, ByteBuffer buffer, Class<T> type, |
| int nativeType, boolean sizeOnly) { |
| |
| // TODO: add support for enums with their own values. |
| return packSingleNative(getEnumValue(value), buffer, Integer.TYPE, nativeType, sizeOnly); |
| } |
| |
| @SuppressWarnings("unchecked") |
| private static <T> int packClass(T value, ByteBuffer buffer, Class<T> type, int nativeType, |
| boolean sizeOnly) { |
| |
| MetadataMarshalClass<T> marshaler = getMarshaler(type, nativeType); |
| if (marshaler == null) { |
| throw new IllegalArgumentException(String.format("Unknown Key type: %s", type)); |
| } |
| |
| return marshaler.marshal(value, buffer, nativeType, sizeOnly); |
| } |
| |
| private static <T> int packArray(T value, ByteBuffer buffer, Class<T> type, int nativeType, |
| boolean sizeOnly) { |
| |
| int size = 0; |
| int arrayLength = Array.getLength(value); |
| |
| @SuppressWarnings("unchecked") |
| Class<Object> componentType = (Class<Object>)type.getComponentType(); |
| |
| for (int i = 0; i < arrayLength; ++i) { |
| size += packSingle(Array.get(value, i), buffer, componentType, nativeType, sizeOnly); |
| } |
| |
| return size; |
| } |
| |
| @SuppressWarnings("unchecked") |
| private static <T> T unpackSingleNative(ByteBuffer buffer, Class<T> type, int nativeType) { |
| |
| T val; |
| |
| if (nativeType == TYPE_BYTE) { |
| val = (T) (Byte) buffer.get(); |
| } else if (nativeType == TYPE_INT32) { |
| val = (T) (Integer) buffer.getInt(); |
| } else if (nativeType == TYPE_FLOAT) { |
| val = (T) (Float) buffer.getFloat(); |
| } else if (nativeType == TYPE_INT64) { |
| val = (T) (Long) buffer.getLong(); |
| } else if (nativeType == TYPE_DOUBLE) { |
| val = (T) (Double) buffer.getDouble(); |
| } else if (nativeType == TYPE_RATIONAL) { |
| val = (T) new Rational(buffer.getInt(), buffer.getInt()); |
| } else { |
| throw new UnsupportedOperationException("Unknown type, can't unpack a native type " |
| + nativeType); |
| } |
| |
| /** |
| * Rewrite types when the native type doesn't match the managed type |
| * - Byte -> Boolean |
| * - Byte -> Integer |
| */ |
| |
| if (nativeType == TYPE_BYTE && type == Boolean.TYPE) { |
| // Since a boolean can't be cast to byte, and we don't want to use getBoolean |
| byte asByte = (Byte) val; |
| boolean asBool = asByte != 0; |
| val = (T) (Boolean) asBool; |
| } else if (nativeType == TYPE_BYTE && type == Integer.TYPE) { |
| byte asByte = (Byte) val; |
| int asInt = asByte; |
| val = (T) (Integer) asInt; |
| } else if (type != getExpectedType(nativeType)) { |
| throw new UnsupportedOperationException("Tried to unpack a type of " + type + |
| " but we expected the type to be " + getExpectedType(nativeType)); |
| } |
| |
| return val; |
| } |
| |
| @SuppressWarnings({"unchecked", "rawtypes"}) |
| private static <T> T unpackSingle(ByteBuffer buffer, Class<T> type, int nativeType) { |
| |
| if (type.isPrimitive() || type == Rational.class) { |
| return unpackSingleNative(buffer, type, nativeType); |
| } |
| |
| if (type.isEnum()) { |
| return (T) unpackEnum(buffer, (Class<Enum>)type, nativeType); |
| } |
| |
| if (type.isArray()) { |
| return unpackArray(buffer, type, nativeType); |
| } |
| |
| T instance = unpackClass(buffer, type, nativeType); |
| |
| return instance; |
| } |
| |
| private static <T extends Enum<T>> T unpackEnum(ByteBuffer buffer, Class<T> type, |
| int nativeType) { |
| int ordinal = unpackSingleNative(buffer, Integer.TYPE, nativeType); |
| return getEnumFromValue(type, ordinal); |
| } |
| |
| private static <T> T unpackClass(ByteBuffer buffer, Class<T> type, int nativeType) { |
| |
| MetadataMarshalClass<T> marshaler = getMarshaler(type, nativeType); |
| if (marshaler == null) { |
| throw new IllegalArgumentException("Unknown class type: " + type); |
| } |
| |
| return marshaler.unmarshal(buffer, nativeType); |
| } |
| |
| @SuppressWarnings("unchecked") |
| private static <T> T unpackArray(ByteBuffer buffer, Class<T> type, int nativeType) { |
| |
| Class<?> componentType = type.getComponentType(); |
| Object array; |
| |
| int elementSize = getTypeSize(nativeType); |
| |
| MetadataMarshalClass<?> marshaler = getMarshaler(componentType, nativeType); |
| if (marshaler != null) { |
| elementSize = marshaler.getNativeSize(nativeType); |
| } |
| |
| if (elementSize != MetadataMarshalClass.NATIVE_SIZE_DYNAMIC) { |
| int remaining = buffer.remaining(); |
| int arraySize = remaining / elementSize; |
| |
| if (VERBOSE) { |
| Log.v(TAG, |
| String.format( |
| "Attempting to unpack array (count = %d, element size = %d, bytes " + |
| "remaining = %d) for type %s", |
| arraySize, elementSize, remaining, type)); |
| } |
| |
| array = Array.newInstance(componentType, arraySize); |
| for (int i = 0; i < arraySize; ++i) { |
| Object elem = unpackSingle(buffer, componentType, nativeType); |
| Array.set(array, i, elem); |
| } |
| } else { |
| // Dynamic size, use an array list. |
| ArrayList<Object> arrayList = new ArrayList<Object>(); |
| |
| int primitiveSize = getTypeSize(nativeType); |
| while (buffer.remaining() >= primitiveSize) { |
| Object elem = unpackSingle(buffer, componentType, nativeType); |
| arrayList.add(elem); |
| } |
| |
| array = arrayList.toArray((T[]) Array.newInstance(componentType, 0)); |
| } |
| |
| if (buffer.remaining() != 0) { |
| Log.e(TAG, "Trailing bytes (" + buffer.remaining() + ") left over after unpacking " |
| + type); |
| } |
| |
| return (T) array; |
| } |
| |
| private <T> T getBase(Key<T> key) { |
| int tag = key.getTag(); |
| byte[] values = readValues(tag); |
| if (values == null) { |
| return null; |
| } |
| |
| int nativeType = getNativeType(tag); |
| |
| ByteBuffer buffer = ByteBuffer.wrap(values).order(ByteOrder.nativeOrder()); |
| return unpackSingle(buffer, key.getType(), nativeType); |
| } |
| |
| // Need overwrite some metadata that has different definitions between native |
| // and managed sides. |
| @SuppressWarnings("unchecked") |
| private <T> T getOverride(Key<T> key) { |
| if (key.equals(CameraCharacteristics.SCALER_AVAILABLE_FORMATS)) { |
| return (T) getAvailableFormats(); |
| } else if (key.equals(CaptureResult.STATISTICS_FACES)) { |
| return (T) getFaces(); |
| } else if (key.equals(CaptureResult.STATISTICS_FACE_RECTANGLES)) { |
| return (T) getFaceRectangles(); |
| } |
| |
| // For other keys, get() falls back to getBase() |
| return null; |
| } |
| |
| private int[] getAvailableFormats() { |
| int[] availableFormats = getBase(CameraCharacteristics.SCALER_AVAILABLE_FORMATS); |
| if (availableFormats != null) { |
| for (int i = 0; i < availableFormats.length; i++) { |
| // JPEG has different value between native and managed side, need override. |
| if (availableFormats[i] == NATIVE_JPEG_FORMAT) { |
| availableFormats[i] = ImageFormat.JPEG; |
| } |
| } |
| } |
| |
| return availableFormats; |
| } |
| |
| private Face[] getFaces() { |
| final int FACE_LANDMARK_SIZE = 6; |
| |
| Integer faceDetectMode = get(CaptureResult.STATISTICS_FACE_DETECT_MODE); |
| if (faceDetectMode == null) { |
| Log.w(TAG, "Face detect mode metadata is null, assuming the mode is SIMPLE"); |
| faceDetectMode = CaptureResult.STATISTICS_FACE_DETECT_MODE_SIMPLE; |
| } else { |
| if (faceDetectMode == CaptureResult.STATISTICS_FACE_DETECT_MODE_OFF) { |
| return new Face[0]; |
| } |
| if (faceDetectMode != CaptureResult.STATISTICS_FACE_DETECT_MODE_SIMPLE && |
| faceDetectMode != CaptureResult.STATISTICS_FACE_DETECT_MODE_FULL) { |
| Log.w(TAG, "Unknown face detect mode: " + faceDetectMode); |
| return new Face[0]; |
| } |
| } |
| |
| // Face scores and rectangles are required by SIMPLE and FULL mode. |
| byte[] faceScores = get(CaptureResult.STATISTICS_FACE_SCORES); |
| Rect[] faceRectangles = get(CaptureResult.STATISTICS_FACE_RECTANGLES); |
| if (faceScores == null || faceRectangles == null) { |
| Log.w(TAG, "Expect face scores and rectangles to be non-null"); |
| return new Face[0]; |
| } else if (faceScores.length != faceRectangles.length) { |
| Log.w(TAG, String.format("Face score size(%d) doesn match face rectangle size(%d)!", |
| faceScores.length, faceRectangles.length)); |
| } |
| |
| // To be safe, make number of faces is the minimal of all face info metadata length. |
| int numFaces = Math.min(faceScores.length, faceRectangles.length); |
| // Face id and landmarks are only required by FULL mode. |
| int[] faceIds = get(CaptureResult.STATISTICS_FACE_IDS); |
| int[] faceLandmarks = get(CaptureResult.STATISTICS_FACE_LANDMARKS); |
| if (faceDetectMode == CaptureResult.STATISTICS_FACE_DETECT_MODE_FULL) { |
| if (faceIds == null || faceLandmarks == null) { |
| Log.w(TAG, "Expect face ids and landmarks to be non-null for FULL mode," + |
| "fallback to SIMPLE mode"); |
| faceDetectMode = CaptureResult.STATISTICS_FACE_DETECT_MODE_SIMPLE; |
| } else { |
| if (faceIds.length != numFaces || |
| faceLandmarks.length != numFaces * FACE_LANDMARK_SIZE) { |
| Log.w(TAG, String.format("Face id size(%d), or face landmark size(%d) don't" + |
| "match face number(%d)!", |
| faceIds.length, faceLandmarks.length * FACE_LANDMARK_SIZE, numFaces)); |
| } |
| // To be safe, make number of faces is the minimal of all face info metadata length. |
| numFaces = Math.min(numFaces, faceIds.length); |
| numFaces = Math.min(numFaces, faceLandmarks.length / FACE_LANDMARK_SIZE); |
| } |
| } |
| |
| ArrayList<Face> faceList = new ArrayList<Face>(); |
| if (faceDetectMode == CaptureResult.STATISTICS_FACE_DETECT_MODE_SIMPLE) { |
| for (int i = 0; i < numFaces; i++) { |
| if (faceScores[i] <= Face.SCORE_MAX && |
| faceScores[i] >= Face.SCORE_MIN) { |
| faceList.add(new Face(faceRectangles[i], faceScores[i])); |
| } |
| } |
| } else { |
| // CaptureResult.STATISTICS_FACE_DETECT_MODE_FULL |
| for (int i = 0; i < numFaces; i++) { |
| if (faceScores[i] <= Face.SCORE_MAX && |
| faceScores[i] >= Face.SCORE_MIN && |
| faceIds[i] >= 0) { |
| Point leftEye = new Point(faceLandmarks[i*6], faceLandmarks[i*6+1]); |
| Point rightEye = new Point(faceLandmarks[i*6+2], faceLandmarks[i*6+3]); |
| Point mouth = new Point(faceLandmarks[i*6+4], faceLandmarks[i*6+5]); |
| Face face = new Face(faceRectangles[i], faceScores[i], faceIds[i], |
| leftEye, rightEye, mouth); |
| faceList.add(face); |
| } |
| } |
| } |
| Face[] faces = new Face[faceList.size()]; |
| faceList.toArray(faces); |
| return faces; |
| } |
| |
| // Face rectangles are defined as (left, top, right, bottom) instead of |
| // (left, top, width, height) at the native level, so the normal Rect |
| // conversion that does (l, t, w, h) -> (l, t, r, b) is unnecessary. Undo |
| // that conversion here for just the faces. |
| private Rect[] getFaceRectangles() { |
| Rect[] faceRectangles = getBase(CaptureResult.STATISTICS_FACE_RECTANGLES); |
| if (faceRectangles == null) return null; |
| |
| Rect[] fixedFaceRectangles = new Rect[faceRectangles.length]; |
| for (int i = 0; i < faceRectangles.length; i++) { |
| fixedFaceRectangles[i] = new Rect( |
| faceRectangles[i].left, |
| faceRectangles[i].top, |
| faceRectangles[i].right - faceRectangles[i].left, |
| faceRectangles[i].bottom - faceRectangles[i].top); |
| } |
| return fixedFaceRectangles; |
| } |
| |
| private <T> void setBase(Key<T> key, T value) { |
| int tag = key.getTag(); |
| |
| if (value == null) { |
| writeValues(tag, null); |
| return; |
| } |
| |
| int nativeType = getNativeType(tag); |
| |
| int size = packSingle(value, null, key.getType(), nativeType, /* sizeOnly */true); |
| |
| // TODO: Optimization. Cache the byte[] and reuse if the size is big enough. |
| byte[] values = new byte[size]; |
| |
| ByteBuffer buffer = ByteBuffer.wrap(values).order(ByteOrder.nativeOrder()); |
| packSingle(value, buffer, key.getType(), nativeType, /*sizeOnly*/false); |
| |
| writeValues(tag, values); |
| } |
| |
| // Set the camera metadata override. |
| private <T> boolean setOverride(Key<T> key, T value) { |
| if (key.equals(CameraCharacteristics.SCALER_AVAILABLE_FORMATS)) { |
| return setAvailableFormats((int[]) value); |
| } else if (key.equals(CaptureResult.STATISTICS_FACE_RECTANGLES)) { |
| return setFaceRectangles((Rect[]) value); |
| } |
| |
| // For other keys, set() falls back to setBase(). |
| return false; |
| } |
| |
| private boolean setAvailableFormats(int[] value) { |
| int[] availableFormat = value; |
| if (value == null) { |
| // Let setBase() to handle the null value case. |
| return false; |
| } |
| |
| int[] newValues = new int[availableFormat.length]; |
| for (int i = 0; i < availableFormat.length; i++) { |
| newValues[i] = availableFormat[i]; |
| if (availableFormat[i] == ImageFormat.JPEG) { |
| newValues[i] = NATIVE_JPEG_FORMAT; |
| } |
| } |
| |
| setBase(CameraCharacteristics.SCALER_AVAILABLE_FORMATS, newValues); |
| return true; |
| } |
| |
| /** |
| * Convert Face Rectangles from managed side to native side as they have different definitions. |
| * <p> |
| * Managed side face rectangles are defined as: left, top, width, height. |
| * Native side face rectangles are defined as: left, top, right, bottom. |
| * The input face rectangle need to be converted to native side definition when set is called. |
| * </p> |
| * |
| * @param faceRects Input face rectangles. |
| * @return true if face rectangles can be set successfully. Otherwise, Let the caller |
| * (setBase) to handle it appropriately. |
| */ |
| private boolean setFaceRectangles(Rect[] faceRects) { |
| if (faceRects == null) { |
| return false; |
| } |
| |
| Rect[] newFaceRects = new Rect[faceRects.length]; |
| for (int i = 0; i < newFaceRects.length; i++) { |
| newFaceRects[i] = new Rect( |
| faceRects[i].left, |
| faceRects[i].top, |
| faceRects[i].right + faceRects[i].left, |
| faceRects[i].bottom + faceRects[i].top); |
| } |
| |
| setBase(CaptureResult.STATISTICS_FACE_RECTANGLES, newFaceRects); |
| return true; |
| } |
| |
| private long mMetadataPtr; // native CameraMetadata* |
| |
| private native long nativeAllocate(); |
| private native long nativeAllocateCopy(CameraMetadataNative other) |
| throws NullPointerException; |
| |
| private native synchronized void nativeWriteToParcel(Parcel dest); |
| private native synchronized void nativeReadFromParcel(Parcel source); |
| private native synchronized void nativeSwap(CameraMetadataNative other) |
| throws NullPointerException; |
| private native synchronized void nativeClose(); |
| private native synchronized boolean nativeIsEmpty(); |
| private native synchronized int nativeGetEntryCount(); |
| |
| private native synchronized byte[] nativeReadValues(int tag); |
| private native synchronized void nativeWriteValues(int tag, byte[] src); |
| |
| private static native int nativeGetTagFromKey(String keyName) |
| throws IllegalArgumentException; |
| private static native int nativeGetTypeFromTag(int tag) |
| throws IllegalArgumentException; |
| private static native void nativeClassInit(); |
| |
| /** |
| * <p>Perform a 0-copy swap of the internal metadata with another object.</p> |
| * |
| * <p>Useful to convert a CameraMetadata into e.g. a CaptureRequest.</p> |
| * |
| * @param other Metadata to swap with |
| * @throws NullPointerException if other was null |
| * @hide |
| */ |
| public void swap(CameraMetadataNative other) { |
| nativeSwap(other); |
| } |
| |
| /** |
| * @hide |
| */ |
| public int getEntryCount() { |
| return nativeGetEntryCount(); |
| } |
| |
| /** |
| * Does this metadata contain at least 1 entry? |
| * |
| * @hide |
| */ |
| public boolean isEmpty() { |
| return nativeIsEmpty(); |
| } |
| |
| /** |
| * Convert a key string into the equivalent native tag. |
| * |
| * @throws IllegalArgumentException if the key was not recognized |
| * @throws NullPointerException if the key was null |
| * |
| * @hide |
| */ |
| public static int getTag(String key) { |
| return nativeGetTagFromKey(key); |
| } |
| |
| /** |
| * Get the underlying native type for a tag. |
| * |
| * @param tag An integer tag, see e.g. {@link #getTag} |
| * @return An int enum for the metadata type, see e.g. {@link #TYPE_BYTE} |
| * |
| * @hide |
| */ |
| public static int getNativeType(int tag) { |
| return nativeGetTypeFromTag(tag); |
| } |
| |
| /** |
| * <p>Updates the existing entry for tag with the new bytes pointed by src, erasing |
| * the entry if src was null.</p> |
| * |
| * <p>An empty array can be passed in to update the entry to 0 elements.</p> |
| * |
| * @param tag An integer tag, see e.g. {@link #getTag} |
| * @param src An array of bytes, or null to erase the entry |
| * |
| * @hide |
| */ |
| public void writeValues(int tag, byte[] src) { |
| nativeWriteValues(tag, src); |
| } |
| |
| /** |
| * <p>Returns a byte[] of data corresponding to this tag. Use a wrapped bytebuffer to unserialize |
| * the data properly.</p> |
| * |
| * <p>An empty array can be returned to denote an existing entry with 0 elements.</p> |
| * |
| * @param tag An integer tag, see e.g. {@link #getTag} |
| * |
| * @return {@code null} if there were 0 entries for this tag, a byte[] otherwise. |
| * @hide |
| */ |
| public byte[] readValues(int tag) { |
| // TODO: Optimization. Native code returns a ByteBuffer instead. |
| return nativeReadValues(tag); |
| } |
| |
| @Override |
| protected void finalize() throws Throwable { |
| try { |
| close(); |
| } finally { |
| super.finalize(); |
| } |
| } |
| |
| private static final HashMap<Class<? extends Enum>, int[]> sEnumValues = |
| new HashMap<Class<? extends Enum>, int[]>(); |
| /** |
| * Register a non-sequential set of values to be used with the pack/unpack functions. |
| * This enables get/set to correctly marshal the enum into a value that is C-compatible. |
| * |
| * @param enumType The class for an enum |
| * @param values A list of values mapping to the ordinals of the enum |
| * |
| * @hide |
| */ |
| public static <T extends Enum<T>> void registerEnumValues(Class<T> enumType, int[] values) { |
| if (enumType.getEnumConstants().length != values.length) { |
| throw new IllegalArgumentException( |
| "Expected values array to be the same size as the enumTypes values " |
| + values.length + " for type " + enumType); |
| } |
| if (VERBOSE) { |
| Log.v(TAG, "Registered enum values for type " + enumType + " values"); |
| } |
| |
| sEnumValues.put(enumType, values); |
| } |
| |
| /** |
| * Get the numeric value from an enum. This is usually the same as the ordinal value for |
| * enums that have fully sequential values, although for C-style enums the range of values |
| * may not map 1:1. |
| * |
| * @param enumValue Enum instance |
| * @return Int guaranteed to be ABI-compatible with the C enum equivalent |
| */ |
| private static <T extends Enum<T>> int getEnumValue(T enumValue) { |
| int[] values; |
| values = sEnumValues.get(enumValue.getClass()); |
| |
| int ordinal = enumValue.ordinal(); |
| if (values != null) { |
| return values[ordinal]; |
| } |
| |
| return ordinal; |
| } |
| |
| /** |
| * Finds the enum corresponding to it's numeric value. Opposite of {@link #getEnumValue} method. |
| * |
| * @param enumType Class of the enum we want to find |
| * @param value The numeric value of the enum |
| * @return An instance of the enum |
| */ |
| private static <T extends Enum<T>> T getEnumFromValue(Class<T> enumType, int value) { |
| int ordinal; |
| |
| int[] registeredValues = sEnumValues.get(enumType); |
| if (registeredValues != null) { |
| ordinal = -1; |
| |
| for (int i = 0; i < registeredValues.length; ++i) { |
| if (registeredValues[i] == value) { |
| ordinal = i; |
| break; |
| } |
| } |
| } else { |
| ordinal = value; |
| } |
| |
| T[] values = enumType.getEnumConstants(); |
| |
| if (ordinal < 0 || ordinal >= values.length) { |
| throw new IllegalArgumentException( |
| String.format( |
| "Argument 'value' (%d) was not a valid enum value for type %s " |
| + "(registered? %b)", |
| value, |
| enumType, (registeredValues != null))); |
| } |
| |
| return values[ordinal]; |
| } |
| |
| static HashMap<Class<?>, MetadataMarshalClass<?>> sMarshalerMap = new |
| HashMap<Class<?>, MetadataMarshalClass<?>>(); |
| |
| private static <T> void registerMarshaler(MetadataMarshalClass<T> marshaler) { |
| sMarshalerMap.put(marshaler.getMarshalingClass(), marshaler); |
| } |
| |
| @SuppressWarnings("unchecked") |
| private static <T> MetadataMarshalClass<T> getMarshaler(Class<T> type, int nativeType) { |
| MetadataMarshalClass<T> marshaler = (MetadataMarshalClass<T>) sMarshalerMap.get(type); |
| |
| if (marshaler != null && !marshaler.isNativeTypeSupported(nativeType)) { |
| throw new UnsupportedOperationException("Unsupported type " + nativeType + |
| " to be marshalled to/from a " + type); |
| } |
| |
| return marshaler; |
| } |
| |
| /** |
| * We use a class initializer to allow the native code to cache some field offsets |
| */ |
| static { |
| nativeClassInit(); |
| |
| if (VERBOSE) { |
| Log.v(TAG, "Shall register metadata marshalers"); |
| } |
| |
| // load built-in marshallers |
| registerMarshaler(new MetadataMarshalRect()); |
| registerMarshaler(new MetadataMarshalSize()); |
| registerMarshaler(new MetadataMarshalString()); |
| |
| if (VERBOSE) { |
| Log.v(TAG, "Registered metadata marshalers"); |
| } |
| } |
| |
| } |