Java ShortBuffer.get方法代码示例

import java.nio.ShortBuffer; //导入方法依赖的package包/类
@Test(dataProvider = "shortViewProvider")
public void testShortGet(String desc, IntFunction<ByteBuffer> fbb,
                         Function<ByteBuffer, ShortBuffer> fbi) {
    ByteBuffer bb = allocate(fbb);
    ShortBuffer vb = fbi.apply(bb);
    int o = bb.position();

    for (int i = 0; i < vb.limit(); i++) {
        short fromBytes = getShortFromBytes(bb, o + i * 2);
        short fromMethodView = bb.getShort(o + i * 2);
        assertValues(i, fromBytes, fromMethodView, bb);

        short fromBufferView = vb.get(i);
        assertValues(i, fromMethodView, fromBufferView, bb, vb);
    }

    for (int i = 0; i < vb.limit(); i++) {
        short v = getShortFromBytes(bb, o + i * 2);
        short a = bb.getShort();
        assertValues(i, v, a, bb);

        short b = vb.get();
        assertValues(i, a, b, bb, vb);
    }

}
 

import java.nio.ShortBuffer; //导入方法依赖的package包/类
@Override
public void remix(final ShortBuffer inSBuff, final ShortBuffer outSBuff) {
    // Up-mix mono to stereo
    final int inRemaining = inSBuff.remaining();
    final int outSpace = outSBuff.remaining() / 2;

    final int samplesToBeProcessed = Math.min(inRemaining, outSpace);
    for (int i = 0; i < samplesToBeProcessed; ++i) {
        final short inSample = inSBuff.get();
        outSBuff.put(inSample);
        outSBuff.put(inSample);
    }
}
 

import java.nio.ShortBuffer; //导入方法依赖的package包/类
private void setStrikethroughMetrics(ByteBuffer os_2Table, int upem) {
    if (os_2Table == null || os_2Table.capacity() < 30 || upem < 0) {
        stSize = .05f;
        stPos = -.4f;
        return;
    }
    ShortBuffer sb = os_2Table.asShortBuffer();
    stSize = sb.get(13) / (float)upem;
    stPos = -sb.get(14) / (float)upem;
}
 

import java.nio.ShortBuffer; //导入方法依赖的package包/类
protected void initAllNames(int requestedID, HashSet<String> names) {

        byte[] name = new byte[256];
        ByteBuffer buffer = getTableBuffer(nameTag);

        if (buffer != null) {
            ShortBuffer sbuffer = buffer.asShortBuffer();
            sbuffer.get(); // format - not needed.
            short numRecords = sbuffer.get();

            /* The name table uses unsigned shorts. Many of these
             * are known small values that fit in a short.
             * The values that are sizes or offsets into the table could be
             * greater than 32767, so read and store those as ints
             */
            int stringPtr = ((int) sbuffer.get()) & 0xffff;
            for (int i=0; i<numRecords; i++) {
                short platformID = sbuffer.get();
                if (platformID != MS_PLATFORM_ID) {
                    sbuffer.position(sbuffer.position()+5);
                    continue; // skip over this record.
                }
                short encodingID = sbuffer.get();
                short langID     = sbuffer.get();
                short nameID     = sbuffer.get();
                int   nameLen    = ((int) sbuffer.get()) & 0xffff;
                int   namePtr    = (((int) sbuffer.get()) & 0xffff) + stringPtr;

                if (nameID == requestedID) {
                    buffer.position(namePtr);
                    buffer.get(name, 0, nameLen);
                    names.add(makeString(name, nameLen, platformID, encodingID));
                }
            }
        }
    }
 

import java.nio.ShortBuffer; //导入方法依赖的package包/类
@Override
public void getStyleMetrics(float pointSize, float[] metrics, int offset) {

    if (ulSize == 0f && ulPos == 0f) {

        ByteBuffer head_Table = getTableBuffer(headTag);
        int upem = -1;
        if (head_Table != null && head_Table.capacity() >= 18) {
            ShortBuffer sb = head_Table.asShortBuffer();
            upem = sb.get(9) & 0xffff;
            if (upem < 16 || upem > 16384) {
                upem = 2048;
            }
        }

        ByteBuffer os2_Table = getTableBuffer(os_2Tag);
        setStrikethroughMetrics(os2_Table, upem);

        ByteBuffer post_Table = getTableBuffer(postTag);
        setUnderlineMetrics(post_Table, upem);
    }

    metrics[offset] = stPos * pointSize;
    metrics[offset+1] = stSize * pointSize;

    metrics[offset+2] = ulPos * pointSize;
    metrics[offset+3] = ulSize * pointSize;
}
 

import java.nio.ShortBuffer; //导入方法依赖的package包/类
protected void initAllNames(int requestedID, HashSet names) {

        byte[] name = new byte[256];
        ByteBuffer buffer = getTableBuffer(nameTag);

        if (buffer != null) {
            ShortBuffer sbuffer = buffer.asShortBuffer();
            sbuffer.get(); // format - not needed.
            short numRecords = sbuffer.get();

            /* The name table uses unsigned shorts. Many of these
             * are known small values that fit in a short.
             * The values that are sizes or offsets into the table could be
             * greater than 32767, so read and store those as ints
             */
            int stringPtr = ((int) sbuffer.get()) & 0xffff;
            for (int i=0; i<numRecords; i++) {
                short platformID = sbuffer.get();
                if (platformID != MS_PLATFORM_ID) {
                    sbuffer.position(sbuffer.position()+5);
                    continue; // skip over this record.
                }
                short encodingID = sbuffer.get();
                short langID     = sbuffer.get();
                short nameID     = sbuffer.get();
                int   nameLen    = ((int) sbuffer.get()) & 0xffff;
                int   namePtr    = (((int) sbuffer.get()) & 0xffff) + stringPtr;

                if (nameID == requestedID) {
                    buffer.position(namePtr);
                    buffer.get(name, 0, nameLen);
                    names.add(makeString(name, nameLen, encodingID));
                }
            }
        }
    }
 

import java.nio.ShortBuffer; //导入方法依赖的package包/类
@Override
public void remix(final ShortBuffer inSBuff, final ShortBuffer outSBuff) {
    // Down-mix stereo to mono
    // Viktor Toth's algorithm -
    // See: http://www.vttoth.com/CMS/index.php/technical-notes/68
    //      http://stackoverflow.com/a/25102339
    final int inRemaining = inSBuff.remaining() / 2;
    final int outSpace = outSBuff.remaining();

    final int samplesToBeProcessed = Math.min(inRemaining, outSpace);
    for (int i = 0; i < samplesToBeProcessed; ++i) {
        // Convert to unsigned
        final int a = inSBuff.get() + SIGNED_SHORT_LIMIT;
        final int b = inSBuff.get() + SIGNED_SHORT_LIMIT;
        int m;
        // Pick the equation
        if ((a < SIGNED_SHORT_LIMIT) || (b < SIGNED_SHORT_LIMIT)) {
            // Viktor's first equation when both sources are "quiet"
            // (i.e. less than middle of the dynamic range)
            m = a * b / SIGNED_SHORT_LIMIT;
        } else {
            // Viktor's second equation when one or both sources are loud
            m = 2 * (a + b) - (a * b) / SIGNED_SHORT_LIMIT - UNSIGNED_SHORT_MAX;
        }
        // Convert output back to signed short
        if (m == UNSIGNED_SHORT_MAX + 1) m = UNSIGNED_SHORT_MAX;
        outSBuff.put((short) (m - SIGNED_SHORT_LIMIT));
    }
}
 

import java.nio.ShortBuffer; //导入方法依赖的package包/类
private void setUnderlineMetrics(ByteBuffer postTable, int upem) {
    if (postTable == null || postTable.capacity() < 12 || upem < 0) {
        ulSize = .05f;
        ulPos = .1f;
        return;
    }
    ShortBuffer sb = postTable.asShortBuffer();
    ulSize = sb.get(5) / (float)upem;
    ulPos = -sb.get(4) / (float)upem;
}
 

import java.nio.ShortBuffer; //导入方法依赖的package包/类
protected String lookupName(short findLocaleID, int findNameID) {
    String foundName = null;
    byte[] name = new byte[1024];

    ByteBuffer buffer = getTableBuffer(nameTag);
    if (buffer != null) {
        ShortBuffer sbuffer = buffer.asShortBuffer();
        sbuffer.get(); // format - not needed.
        short numRecords = sbuffer.get();

        /* The name table uses unsigned shorts. Many of these
         * are known small values that fit in a short.
         * The values that are sizes or offsets into the table could be
         * greater than 32767, so read and store those as ints
         */
        int stringPtr = ((int) sbuffer.get()) & 0xffff;

        for (int i=0; i<numRecords; i++) {
            short platformID = sbuffer.get();
            if (platformID != MS_PLATFORM_ID) {
                sbuffer.position(sbuffer.position()+5);
                continue; // skip over this record.
            }
            short encodingID = sbuffer.get();
            short langID     = sbuffer.get();
            short nameID     = sbuffer.get();
            int   nameLen    = ((int) sbuffer.get()) & 0xffff;
            int   namePtr    = (((int) sbuffer.get()) & 0xffff) + stringPtr;
            if (nameID == findNameID &&
                ((foundName == null && langID == ENGLISH_LOCALE_ID)
                 || langID == findLocaleID)) {
                buffer.position(namePtr);
                buffer.get(name, 0, nameLen);
                foundName = makeString(name, nameLen, encodingID);
                if (langID == findLocaleID) {
                    return foundName;
                }
            }
        }
    }
    return foundName;
}
 

import java.nio.ShortBuffer; //导入方法依赖的package包/类
private static double lookupElevation(ShortBuffer shortBuffer, 
		double lat, double lon,
		double minX, double maxX, double minY, double maxY,
		int width, int height,
		int bgColor) {
	final int tileHeight = height;
	final int tileWidth = width;

	final double sectorDeltaLat = maxY - minY;
	final double sectorDeltaLon = maxX - minX;
	final double dLat = maxY - lat;
	final double dLon = lon - minX;
	final double sLat = dLat / sectorDeltaLat;
	final double sLon = dLon / sectorDeltaLon;

	int j = (int) ((tileHeight - 1) * sLat);
	int i = (int) ((tileWidth - 1) * sLon);
	int k = j * tileWidth + i;

	if (k >= tileHeight * tileWidth) return bgColor;
	if (k < 0) return bgColor;

	double eLeft = shortBuffer.get(k);

	double eRight = i < (tileWidth - 1) ? shortBuffer.get(k + 1) : eLeft;

	if (bgColor == eLeft)
		eLeft = eRight;
	if (bgColor == eRight)
		eRight = eLeft;

	double dw = sectorDeltaLon / (tileWidth - 1);
	double dh = sectorDeltaLat / (tileHeight - 1);
	double ssLon = (dLon - i * dw) / dw;
	double ssLat = (dLat - j * dh) / dh;

	double eTop = eLeft + ssLon * (eRight - eLeft);

	if (j < tileHeight - 1 && i < tileWidth - 1)
	{
		eLeft = shortBuffer.get(k + tileWidth);
		eRight = shortBuffer.get(k + tileWidth + 1);

		if (bgColor == eLeft)
			eLeft = eRight;
		if (bgColor == eRight)
			eRight = eLeft;
	}

	double eBot = eLeft + ssLon * (eRight - eLeft);
	
	if (eTop == bgColor)
		eTop = eBot;
	if (eBot == bgColor)
		eBot = eTop;
	
	return eTop + ssLat * (eBot - eTop);
}
 

import java.nio.ShortBuffer; //导入方法依赖的package包/类
protected String lookupName(short findLocaleID, int findNameID) {
    String foundName = null;
    byte[] name = new byte[1024];

    ByteBuffer buffer = getTableBuffer(nameTag);
    if (buffer != null) {
        ShortBuffer sbuffer = buffer.asShortBuffer();
        sbuffer.get(); // format - not needed.
        short numRecords = sbuffer.get();

        /* The name table uses unsigned shorts. Many of these
         * are known small values that fit in a short.
         * The values that are sizes or offsets into the table could be
         * greater than 32767, so read and store those as ints
         */
        int stringPtr = ((int) sbuffer.get()) & 0xffff;

        for (int i=0; i<numRecords; i++) {
            short platformID = sbuffer.get();
            if (platformID != MS_PLATFORM_ID) {
                sbuffer.position(sbuffer.position()+5);
                continue; // skip over this record.
            }
            short encodingID = sbuffer.get();
            short langID     = sbuffer.get();
            short nameID     = sbuffer.get();
            int   nameLen    = ((int) sbuffer.get()) & 0xffff;
            int   namePtr    = (((int) sbuffer.get()) & 0xffff) + stringPtr;
            if (nameID == findNameID &&
                ((foundName == null && langID == ENGLISH_LOCALE_ID)
                 || langID == findLocaleID)) {
                buffer.position(namePtr);
                buffer.get(name, 0, nameLen);
                foundName = makeString(name, nameLen, platformID, encodingID);
                if (langID == findLocaleID) {
                    return foundName;
                }
            }
        }
    }
    return foundName;
}
 

import java.nio.ShortBuffer; //导入方法依赖的package包/类
short getShort(ShortBuffer vb, int i) { ck(vb.get(i / 2), getShortX(i)); return vb.get(i / 2); }