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/*
* 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 com.android.camera2.its;
import android.content.Context;
import android.graphics.ImageFormat;
import android.hardware.camera2.CameraDevice;
import android.hardware.camera2.CameraCharacteristics;
import android.hardware.camera2.CaptureRequest;
import android.hardware.camera2.CaptureResult;
import android.hardware.camera2.params.MeteringRectangle;
import android.hardware.camera2.params.StreamConfiguration;
import android.hardware.camera2.params.StreamConfigurationMap;
import android.media.Image;
import android.media.Image.Plane;
import android.net.Uri;
import android.os.Environment;
import android.util.Log;
import android.util.Size;
import org.json.JSONArray;
import org.json.JSONObject;
import java.nio.ByteBuffer;
import java.nio.charset.Charset;
import java.util.ArrayList;
import java.util.List;
public class ItsUtils {
public static final String TAG = ItsUtils.class.getSimpleName();
public static ByteBuffer jsonToByteBuffer(JSONObject jsonObj) {
return ByteBuffer.wrap(jsonObj.toString().getBytes(Charset.defaultCharset()));
}
public static MeteringRectangle[] getJsonWeightedRectsFromArray(
JSONArray a, boolean normalized, int width, int height)
throws ItsException {
try {
// Returns [x0,y0,x1,y1,wgt, x0,y0,x1,y1,wgt, x0,y0,x1,y1,wgt, ...]
assert(a.length() % 5 == 0);
MeteringRectangle[] ma = new MeteringRectangle[a.length() / 5];
for (int i = 0; i < a.length(); i += 5) {
int x,y,w,h;
if (normalized) {
x = (int)Math.floor(a.getDouble(i+0) * width + 0.5f);
y = (int)Math.floor(a.getDouble(i+1) * height + 0.5f);
w = (int)Math.floor(a.getDouble(i+2) * width + 0.5f);
h = (int)Math.floor(a.getDouble(i+3) * height + 0.5f);
} else {
x = a.getInt(i+0);
y = a.getInt(i+1);
w = a.getInt(i+2);
h = a.getInt(i+3);
}
x = Math.max(x, 0);
y = Math.max(y, 0);
w = Math.min(w, width-x);
h = Math.min(h, height-y);
int wgt = a.getInt(i+4);
ma[i/5] = new MeteringRectangle(x,y,w,h,wgt);
}
return ma;
} catch (org.json.JSONException e) {
throw new ItsException("JSON error: ", e);
}
}
public static JSONArray getOutputSpecs(JSONObject jsonObjTop)
throws ItsException {
try {
if (jsonObjTop.has("outputSurfaces")) {
return jsonObjTop.getJSONArray("outputSurfaces");
}
return null;
} catch (org.json.JSONException e) {
throw new ItsException("JSON error: ", e);
}
}
public static Size[] getRawOutputSizes(CameraCharacteristics ccs)
throws ItsException {
return getOutputSizes(ccs, ImageFormat.RAW_SENSOR);
}
public static Size[] getJpegOutputSizes(CameraCharacteristics ccs)
throws ItsException {
return getOutputSizes(ccs, ImageFormat.JPEG);
}
public static Size[] getYuvOutputSizes(CameraCharacteristics ccs)
throws ItsException {
return getOutputSizes(ccs, ImageFormat.YUV_420_888);
}
private static Size[] getOutputSizes(CameraCharacteristics ccs, int format)
throws ItsException {
StreamConfigurationMap configMap = ccs.get(
CameraCharacteristics.SCALER_STREAM_CONFIGURATION_MAP);
if (configMap == null) {
throw new ItsException("Failed to get stream config");
}
return configMap.getOutputSizes(format);
}
public static byte[] getDataFromImage(Image image)
throws ItsException {
int format = image.getFormat();
int width = image.getWidth();
int height = image.getHeight();
byte[] data = null;
// Read image data
Plane[] planes = image.getPlanes();
// Check image validity
if (!checkAndroidImageFormat(image)) {
throw new ItsException(
"Invalid image format passed to getDataFromImage: " + image.getFormat());
}
if (format == ImageFormat.JPEG) {
// JPEG doesn't have pixelstride and rowstride, treat it as 1D buffer.
ByteBuffer buffer = planes[0].getBuffer();
data = new byte[buffer.capacity()];
buffer.get(data);
return data;
} else if (format == ImageFormat.YUV_420_888 || format == ImageFormat.RAW_SENSOR
|| format == ImageFormat.RAW10) {
int offset = 0;
data = new byte[width * height * ImageFormat.getBitsPerPixel(format) / 8];
byte[] rowData = new byte[planes[0].getRowStride()];
for (int i = 0; i < planes.length; i++) {
ByteBuffer buffer = planes[i].getBuffer();
int rowStride = planes[i].getRowStride();
int pixelStride = planes[i].getPixelStride();
int bytesPerPixel = ImageFormat.getBitsPerPixel(format) / 8;
Logt.i(TAG, String.format(
"Reading image: fmt %d, plane %d, w %d, h %d, rowStride %d, pixStride %d",
format, i, width, height, rowStride, pixelStride));
// For multi-planar yuv images, assuming yuv420 with 2x2 chroma subsampling.
int w = (i == 0) ? width : width / 2;
int h = (i == 0) ? height : height / 2;
for (int row = 0; row < h; row++) {
if (pixelStride == bytesPerPixel) {
// Special case: optimized read of the entire row
int length = w * bytesPerPixel;
buffer.get(data, offset, length);
// Advance buffer the remainder of the row stride
buffer.position(buffer.position() + rowStride - length);
offset += length;
} else {
// Generic case: should work for any pixelStride but slower.
// Use intermediate buffer to avoid read byte-by-byte from
// DirectByteBuffer, which is very bad for performance.
// Also need avoid access out of bound by only reading the available
// bytes in the bytebuffer.
int readSize = rowStride;
if (buffer.remaining() < readSize) {
readSize = buffer.remaining();
}
buffer.get(rowData, 0, readSize);
for (int col = 0; col < w; col++) {
data[offset++] = rowData[col * pixelStride];
}
}
}
}
Logt.i(TAG, String.format("Done reading image, format %d", format));
return data;
} else {
throw new ItsException("Unsupported image format: " + format);
}
}
private static boolean checkAndroidImageFormat(Image image) {
int format = image.getFormat();
Plane[] planes = image.getPlanes();
switch (format) {
case ImageFormat.YUV_420_888:
case ImageFormat.NV21:
case ImageFormat.YV12:
return 3 == planes.length;
case ImageFormat.RAW_SENSOR:
case ImageFormat.RAW10:
case ImageFormat.JPEG:
return 1 == planes.length;
default:
return false;
}
}
}
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