Java PointerByReference类代码示例

import com.sun.jna.ptr.PointerByReference; //导入依赖的package包/类
/**
 * Returns a data field in the actual aggregate element.
 * 
 * @param aggregate
 *            Existing aggregation
 * @param elementIndex
 *            Position in the existing aggregation, first position is 0
 * @param valueType
 *            Type of output value
 * @return Value of the specific element in the aggregation
 */
public Object engiGetAggrElement(Pointer aggregate, int elementIndex, SdaiTypes valueType) {
	Object returnValue = null;
	switch (valueType) {
	case INTEGER:
		IntByReference intRef = new IntByReference();
		engine.engiGetAggrElement(aggregate, elementIndex, valueType.ordinal(), intRef);
		returnValue = new Integer(intRef.getValue());
		break;
	case REAL:
		DoubleByReference dblRef = new DoubleByReference();
		engine.engiGetAggrElement(aggregate, elementIndex, valueType.ordinal(), dblRef);
		returnValue = new Double(dblRef.getValue());
		break;
	case STRING:
		PointerByReference strRef = new PointerByReference();
		engine.engiGetAggrElement(aggregate, elementIndex, valueType.ordinal(), strRef);
		Pointer strPtr = strRef.getValue();
		if (strPtr != null)
			returnValue = strPtr.getString(0);
		break;
	default:
		PointerByReference ptrRef = new PointerByReference();
		engine.engiGetAggrElement(aggregate, elementIndex, valueType.ordinal(), ptrRef);
		returnValue = ptrRef.getValue();
		break;
	}
	return returnValue;
}
 

import com.sun.jna.ptr.PointerByReference; //导入依赖的package包/类
/**
 * Implementation postponed till version 1.10
 * 
 * @param iterator
 *            Existing iterator
 * @param valueType
 *            Type of output value
 * @return
 */
public Object sdaiGetAggrByIterator(Pointer iterator, SdaiTypes valueType) {
	Object returnValue = null;

	switch (valueType) {
	case REAL:
		DoubleByReference dVal = new DoubleByReference();
		engine.sdaiGetAggrByIterator(iterator, valueType.ordinal(), dVal);
		returnValue = new Double(dVal.getValue());
		break;
	case INTEGER:
	case BOOLEAN:
	case LOGICAL:
		IntByReference iVal = new IntByReference();
		engine.sdaiGetAggrByIterator(iterator, valueType.ordinal(), iVal);
		returnValue = new Integer(iVal.getValue());
		break;
	case STRING:
		PointerByReference sVal = new PointerByReference();
		engine.sdaiGetAggrByIterator(iterator, valueType.ordinal(), sVal);
		returnValue = (String) sVal.getValue().getString(0);
		break;
	default:
		PointerByReference ptr = new PointerByReference();
		engine.sdaiGetAggrByIterator(iterator, valueType.ordinal(), ptr);
		returnValue = ptr.getValue();
		break;
	}
	return returnValue;
}
 

import com.sun.jna.ptr.PointerByReference; //导入依赖的package包/类
/** try to install our custom rule profile into sandbox_init() to block execution */
private static void macImpl(Path tmpFile) throws IOException {
    // first be defensive: we can give nice errors this way, at the very least.
    boolean supported = Constants.MAC_OS_X;
    if (supported == false) {
        throw new IllegalStateException("bug: should not be trying to initialize seatbelt for an unsupported OS");
    }

    // we couldn't link methods, could be some really ancient OS X (< Leopard) or some bug
    if (libc_mac == null) {
        throw new UnsupportedOperationException("seatbelt unavailable: could not link methods. requires Leopard or above.");
    }

    // write rules to a temporary file, which will be passed to sandbox_init()
    Path rules = Files.createTempFile(tmpFile, "es", "sb");
    Files.write(rules, Collections.singleton(SANDBOX_RULES), StandardCharsets.UTF_8);

    boolean success = false;
    try {
        PointerByReference errorRef = new PointerByReference();
        int ret = libc_mac.sandbox_init(rules.toAbsolutePath().toString(), SANDBOX_NAMED, errorRef);
        // if sandbox_init() fails, add the message from the OS (e.g. syntax error) and free the buffer
        if (ret != 0) {
            Pointer errorBuf = errorRef.getValue();
            RuntimeException e = new UnsupportedOperationException("sandbox_init(): " + errorBuf.getString(0));
            libc_mac.sandbox_free_error(errorBuf);
            throw e;
        }
        logger.debug("OS X seatbelt initialization successful");
        success = true;
    } finally {
        if (success) {
            Files.delete(rules);
        } else {
            IOUtils.deleteFilesIgnoringExceptions(rules);
        }
    }
}
 

import com.sun.jna.ptr.PointerByReference; //导入依赖的package包/类
int st_mobile_face_attribute_detect(
      Pointer handle,
      byte[] image,
      int pixel_format,
      int image_width,
      int image_height,
      int image_stride,
      PointerByReference p_face,                 //检查这里是否和st_mobile_face_action_t **p_face_action_array用法类似
      IntByReference p_attributes
);
 

import com.sun.jna.ptr.PointerByReference; //导入依赖的package包/类
public void close() {
    if (formatContext != null) {
        PointerByReference ptr = new PointerByReference(formatContext.getPointer());
        Avformat57Library.INSTANCE.avformat_close_input(ptr);
    }
    formatContext = null;
    buffer = null;
}
 

import com.sun.jna.ptr.PointerByReference; //导入依赖的package包/类
public String getString() {
    final PointerByReference ref = new PointerByReference();
    ChromaprintLibrary.INSTANCE.chromaprint_get_fingerprint(context, ref);
    String fp = ref.getValue().getString(0);
    ChromaprintLibrary.INSTANCE.chromaprint_dealloc(ref.getPointer());
    return fp;
}
 

import com.sun.jna.ptr.PointerByReference; //导入依赖的package包/类
public boolean plan() {
	ArrayList<PoseSteering> finalPath = new ArrayList<PoseSteering>();  
	for (int i = 0; i < this.goal.length; i++) {
		Pose start_ = null;
		Pose goal_ = this.goal[i];
		if (i == 0) start_ = this.start;
		else start_ = this.goal[i-1];
		path = new PointerByReference();
		pathLength = new IntByReference();
		if (collisionCircleCenters == null) {
			if (!INSTANCE.plan(mapFilename, mapResolution, robotRadius, start_.getX(), start_.getY(), start_.getTheta(), goal_.getX(), goal_.getY(), goal_.getTheta(), path, pathLength, distanceBetweenPathPoints, turningRadius)) return false;
		}
		else {
			double[] xCoords = new double[collisionCircleCenters.length];
			double[] yCoords = new double[collisionCircleCenters.length];
			int numCoords = collisionCircleCenters.length;
			for (int j = 0; j < collisionCircleCenters.length; j++) {
				xCoords[j] = collisionCircleCenters[j].x;
				yCoords[j] = collisionCircleCenters[j].y;
			}
			System.out.println("Path planning with " + collisionCircleCenters.length + " circle positions");
			if (this.mapFilename != null) {
				if (!INSTANCE.plan_multiple_circles(mapFilename, mapResolution, robotRadius, xCoords, yCoords, numCoords, start_.getX(), start_.getY(), start_.getTheta(), goal_.getX(), goal_.getY(), goal_.getTheta(), path, pathLength, distanceBetweenPathPoints, turningRadius)) return false;					
			}
			else {
				if (!INSTANCE.plan_multiple_circles_nomap(xCoords, yCoords, numCoords, start_.getX(), start_.getY(), start_.getTheta(), goal_.getX(), goal_.getY(), goal_.getTheta(), path, pathLength, distanceBetweenPathPoints, turningRadius)) return false;					
			}
		}
		final Pointer pathVals = path.getValue();
		final PathPose valsRef = new PathPose(pathVals);
		valsRef.read();
		int numVals = pathLength.getValue();
		PathPose[] pathPoses = (PathPose[])valsRef.toArray(numVals);
		if (i == 0) finalPath.add(new PoseSteering(pathPoses[0].x, pathPoses[0].y, pathPoses[0].theta, 0.0));
		for (int j = 1; j < pathPoses.length; j++) finalPath.add(new PoseSteering(pathPoses[j].x, pathPoses[j].y, pathPoses[j].theta, 0.0));
		INSTANCE.cleanupPath(pathVals);
	}
	this.pathPS = finalPath.toArray(new PoseSteering[finalPath.size()]);
	return true;
}
 

import com.sun.jna.ptr.PointerByReference; //导入依赖的package包/类
/**
 * Initializes Tesseract engine.
 */
protected void init() {
    handle = TessBaseAPICreate();
    StringArray sarray = new StringArray(configList.toArray(new String[0]));
    PointerByReference configs = new PointerByReference();
    configs.setPointer(sarray);
    TessBaseAPIInit1(handle, datapath, language, ocrEngineMode, configs, configList.size());
    if (psm > -1) {
        TessBaseAPISetPageSegMode(handle, psm);
    }
}
 

import com.sun.jna.ptr.PointerByReference; //导入依赖的package包/类
@Test
public void chromaprint_get_fingerprint() throws Exception {
    ChromaprintLibrary.INSTANCE.chromaprint_start(context, 44100, 1);
    short[] data = {0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10};
    ChromaprintLibrary.INSTANCE.chromaprint_feed(context, data, data.length);
    ChromaprintLibrary.INSTANCE.chromaprint_finish(context);

    final PointerByReference ref = new PointerByReference();
    ChromaprintLibrary.INSTANCE.chromaprint_get_fingerprint(context, ref);
    System.out.println(ref.getValue().getString(0));
}
 

import com.sun.jna.ptr.PointerByReference; //导入依赖的package包/类
/**
 * @param id @see AVCodecID<br>
 * C type : AVCodecID<br>
 * @param type @see org.ffmpeg.avutil55.Avutil55Library#AVMediaType<br>
 * C type : AVMediaType<br>
 * @param name C type : const char*<br>
 * @param long_name C type : const char*<br>
 * @param mime_types C type : const char**<br>
 * @param profiles C type : AVProfile*
 */
public AVCodecDescriptor(int id, int type, Pointer name, Pointer long_name, int props, PointerByReference mime_types, org.ffmpeg.avcodec57.AVProfile.ByReference profiles) {
	super();
	this.id = id;
	this.type = type;
	this.name = name;
	this.long_name = long_name;
	this.props = props;
	this.mime_types = mime_types;
	this.profiles = profiles;
}
 

import com.sun.jna.ptr.PointerByReference; //导入依赖的package包/类
boolean GetQueuedCompletionStatus(HANDLE CompletionPort,
IntByReference lpNumberOfBytes, ByReference lpCompletionKey,
PointerByReference lpOverlapped, int dwMilliseconds);
 

import com.sun.jna.ptr.PointerByReference; //导入依赖的package包/类
/**
 * compile an expression into a database to use for scanning
 * @param expression Expression to compile
 * @return Compiled database
 * @throws Throwable CompileErrorException on errors concerning the pattern, otherwise different Throwable's
 */
public static Database compile(Expression expression) throws Throwable {
    PointerByReference database = new PointerByReference();
    PointerByReference error = new PointerByReference();


    int hsError = HyperscanLibrary.INSTANCE.hs_compile(expression.getExpression(),
            Util.bitEnumSetToInt(expression.getFlags()), HS_MODE_BLOCK, Pointer.NULL, database, error);

    ArrayList<Expression> expressions = new ArrayList<Expression>(1);
    expressions.add(expression);

    handleErrors(hsError, error.getValue(), expressions);

    return new Database(database.getValue(), expressions);
}
 

import com.sun.jna.ptr.PointerByReference; //导入依赖的package包/类
int hs_compile_multi(String[] expressions, int[] flags, int[] ids, int elements, int mode, Pointer platform,
PointerByReference database, PointerByReference error);
 

import com.sun.jna.ptr.PointerByReference; //导入依赖的package包/类
int st_mobile_face_attribute_create(
    String model_path,
    PointerByReference handle
);
 

import com.sun.jna.ptr.PointerByReference; //导入依赖的package包/类
@Nullable
public byte[] tryRead(byte[] buf) throws FFmpegException {
    if (formatContext == null) throw new IllegalStateException("Decoder is already closed");

    int retval;
    while (true) {
        retval = Avformat57Library.INSTANCE.av_read_frame(formatContext, packet);
        if (retval < 0) return null;
        packet.read();
        if (packet.stream_index != audioStreamIndex) {
            Avcodec57Library.INSTANCE.av_packet_unref(packet);
        } else break;
    }

    retval = Avcodec57Library.INSTANCE.avcodec_send_packet(codecContext, packet.getPointer());
    if (retval < 0 && retval != -11 && retval != AVERROR_EOF) {
        throw new FFmpegException("Decode packet failed! avcodec_send_packet returned " + retval);
    }

    AVFrame frame = Avutil55Library.INSTANCE.av_frame_alloc();
    retval = Avcodec57Library.INSTANCE.avcodec_receive_frame(codecContext, frame);
    if (retval < 0 && retval != AVERROR_EOF) {
        throw new FFmpegException("Decode packet failed! avcodec_receive_frame returned " + retval);
    }
    frame.read();

    updatePosition(frame);

    fixFrameArgs(frame);

    long destNumSamplesPerChannel =
            Avutil55Library.INSTANCE.av_rescale_rnd(
                    Swresample2Library.INSTANCE.swr_get_delay(swrContext, frame.sample_rate) + frame.nb_samples,
                    frame.sample_rate, frame.sample_rate, 0);
    PointerByReference tempPtr = new PointerByReference(audioBuffer);
    int numSamples = Swresample2Library.INSTANCE.swr_convert(swrContext, tempPtr,
            (int) destNumSamplesPerChannel, frame.data, frame.nb_samples);
    int dataSize = frame.channels * numSamples * Avutil55Library.INSTANCE.av_get_bytes_per_sample(sampleFormat);
    Avutil55Library.INSTANCE.av_frame_free(new PointerByReference(frame.getPointer()));

    audioBuffer = tempPtr.getValue();
    if (buf != null && buf.length == dataSize) {
        audioBuffer.read(0, buf, 0, dataSize);
        return buf;
    }
    return audioBuffer.getByteArray(0, dataSize);
}