54 lines
1.4 KiB
Java
54 lines
1.4 KiB
Java
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package org.jcodec.common;
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import java.nio.ByteBuffer;
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import org.jcodec.common.tools.MathUtil;
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import org.jcodec.platform.Platform;
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public class JCodecUtil2 {
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public static void writeBER32(ByteBuffer buffer, int value) {
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buffer.put((byte)(value >> 21 | 0x80));
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buffer.put((byte)(value >> 14 | 0x80));
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buffer.put((byte)(value >> 7 | 0x80));
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buffer.put((byte)(value & 0x7F));
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}
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public static int readBER32(ByteBuffer input) {
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int size = 0;
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for (int i = 0; i < 4; i++) {
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byte b = input.get();
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size = size << 7 | b & Byte.MAX_VALUE;
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if ((b & 0xFF) >> 7 == 0)
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break;
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}
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return size;
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}
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public static void writeBER32Var(ByteBuffer bb, int value) {
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for (int i = 0, bits = MathUtil.log2(value); i < 4 && bits > 0; i++) {
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bits -= 7;
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int out = value >> bits;
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if (bits > 0)
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out |= 0x80;
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bb.put((byte)out);
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}
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}
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public static byte[] asciiString(String fourcc) {
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return Platform.getBytes(fourcc);
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}
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public static int[] getAsIntArray(ByteBuffer yuv, int size) {
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byte[] b = new byte[size];
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int[] result = new int[size];
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yuv.get(b);
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for (int i = 0; i < b.length; i++)
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result[i] = b[i] & 0xFF;
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return result;
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}
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public static String removeExtension(String name) {
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if (name == null)
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return null;
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return name.replaceAll("\\.[^\\.]+$", "");
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}
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}
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