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-rw-r--r--awt/javax/imageio/plugins/jpeg/JPEGHuffmanTable.java171
1 files changed, 92 insertions, 79 deletions
diff --git a/awt/javax/imageio/plugins/jpeg/JPEGHuffmanTable.java b/awt/javax/imageio/plugins/jpeg/JPEGHuffmanTable.java
index 398c960..67b504b 100644
--- a/awt/javax/imageio/plugins/jpeg/JPEGHuffmanTable.java
+++ b/awt/javax/imageio/plugins/jpeg/JPEGHuffmanTable.java
@@ -18,82 +18,90 @@
package javax.imageio.plugins.jpeg;
/**
- * The JPEGHuffmanTable class represents a single JPEG Huffman table.
- * It contains the standard tables from the JPEG specification.
+ * The JPEGHuffmanTable class represents a single JPEG Huffman table. It
+ * contains the standard tables from the JPEG specification.
+ *
+ * @since Android 1.0
*/
public class JPEGHuffmanTable {
-
- /** The standard DC luminance Huffman table . */
- public static final JPEGHuffmanTable StdDCLuminance = new JPEGHuffmanTable(
- new short[] {0, 1, 5, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0},
- new short[] {0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 0x0A, 0x0B},
- false
- );
-
- /** The standard DC chrominance Huffman table. */
- public static final JPEGHuffmanTable StdDCChrominance = new JPEGHuffmanTable(
- new short[] {0, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0},
- new short[] {0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 0x0A, 0x0B},
- false
- );
-
- /** The standard AC luminance Huffman table. */
- public static final JPEGHuffmanTable StdACLuminance = new JPEGHuffmanTable(
- new short[] {0, 2, 1, 3, 3, 2, 4, 3, 5, 5, 4, 4, 0, 0, 1, 0x7D},
- new short[] {
- 0x01, 0x02, 0x03, 0x00, 0x04, 0x11, 0x05, 0x12, 0x21, 0x31, 0x41, 0x06,
- 0x13, 0x51, 0x61, 0x07, 0x22, 0x71, 0x14, 0x32, 0x81, 0x91, 0xA1, 0x08,
- 0x23, 0x42, 0xB1, 0xC1, 0x15, 0x52, 0xD1, 0xF0, 0x24, 0x33, 0x62, 0x72,
- 0x82, 0x09, 0x0A, 0x16, 0x17, 0x18, 0x19, 0x1A, 0x25, 0x26, 0x27, 0x28,
- 0x29, 0x2A, 0x34, 0x35, 0x36, 0x37, 0x38, 0x39, 0x3A, 0x43, 0x44, 0x45,
- 0x46, 0x47, 0x48, 0x49, 0x4A, 0x53, 0x54, 0x55, 0x56, 0x57, 0x58, 0x59,
- 0x5A, 0x63, 0x64, 0x65, 0x66, 0x67, 0x68, 0x69, 0x6A, 0x73, 0x74, 0x75,
- 0x76, 0x77, 0x78, 0x79, 0x7A, 0x83, 0x84, 0x85, 0x86, 0x87, 0x88, 0x89,
- 0x8A, 0x92, 0x93, 0x94, 0x95, 0x96, 0x97, 0x98, 0x99, 0x9A, 0xA2, 0xA3,
- 0xA4, 0xA5, 0xA6, 0xA7, 0xA8, 0xA9, 0xAA, 0xB2, 0xB3, 0xB4, 0xB5, 0xB6,
- 0xB7, 0xB8, 0xB9, 0xBA, 0xC2, 0xC3, 0xC4, 0xC5, 0xC6, 0xC7, 0xC8, 0xC9,
- 0xCA, 0xD2, 0xD3, 0xD4, 0xD5, 0xD6, 0xD7, 0xD8, 0xD9, 0xDA, 0xE1, 0xE2,
- 0xE3, 0xE4, 0xE5, 0xE6, 0xE7, 0xE8, 0xE9, 0xEA, 0xF1, 0xF2, 0xF3, 0xF4,
- 0xF5, 0xF6, 0xF7, 0xF8, 0xF9, 0xFA
- },
- false
- );
-
- /**
- * The standard AC chrominance Huffman table. */
- public static final JPEGHuffmanTable StdACChrominance = new JPEGHuffmanTable(
- new short[] {0, 2, 1, 2, 4, 4, 3, 4, 7, 5, 4, 4, 0, 1, 2, 0x77},
- new short[] {
- 0x00, 0x01, 0x02, 0x03, 0x11, 0x04, 0x05, 0x21, 0x31, 0x06, 0x12, 0x41,
- 0x51, 0x07, 0x61, 0x71, 0x13, 0x22, 0x32, 0x81, 0x08, 0x14, 0x42, 0x91,
- 0xA1, 0xB1, 0xC1, 0x09, 0x23, 0x33, 0x52, 0xF0, 0x15, 0x62, 0x72, 0xD1,
- 0x0A, 0x16, 0x24, 0x34, 0xE1, 0x25, 0xF1, 0x17, 0x18, 0x19, 0x1A, 0x26,
- 0x27, 0x28, 0x29, 0x2A, 0x35, 0x36, 0x37, 0x38, 0x39, 0x3A, 0x43, 0x44,
- 0x45, 0x46, 0x47, 0x48, 0x49, 0x4A, 0x53, 0x54, 0x55, 0x56, 0x57, 0x58,
- 0x59, 0x5A, 0x63, 0x64, 0x65, 0x66, 0x67, 0x68, 0x69, 0x6A, 0x73, 0x74,
- 0x75, 0x76, 0x77, 0x78, 0x79, 0x7A, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87,
- 0x88, 0x89, 0x8A, 0x92, 0x93, 0x94, 0x95, 0x96, 0x97, 0x98, 0x99, 0x9A,
- 0xA2, 0xA3, 0xA4, 0xA5, 0xA6, 0xA7, 0xA8, 0xA9, 0xAA, 0xB2, 0xB3, 0xB4,
- 0xB5, 0xB6, 0xB7, 0xB8, 0xB9, 0xBA, 0xC2, 0xC3, 0xC4, 0xC5, 0xC6, 0xC7,
- 0xC8, 0xC9, 0xCA, 0xD2, 0xD3, 0xD4, 0xD5, 0xD6, 0xD7, 0xD8, 0xD9, 0xDA,
- 0xE2, 0xE3, 0xE4, 0xE5, 0xE6, 0xE7, 0xE8, 0xE9, 0xEA, 0xF2, 0xF3, 0xF4,
- 0xF5, 0xF6, 0xF7, 0xF8, 0xF9, 0xFA
- },
- false
- );
-
- /** The lengths. */
+
+ /**
+ * The standard DC luminance Huffman table .
+ */
+ public static final JPEGHuffmanTable StdDCLuminance = new JPEGHuffmanTable(new short[] {
+ 0, 1, 5, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0
+ }, new short[] {
+ 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 0x0A, 0x0B
+ }, false);
+
+ /**
+ * The standard DC chrominance Huffman table.
+ */
+ public static final JPEGHuffmanTable StdDCChrominance = new JPEGHuffmanTable(new short[] {
+ 0, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0
+ }, new short[] {
+ 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 0x0A, 0x0B
+ }, false);
+
+ /**
+ * The standard AC luminance Huffman table.
+ */
+ public static final JPEGHuffmanTable StdACLuminance = new JPEGHuffmanTable(new short[] {
+ 0, 2, 1, 3, 3, 2, 4, 3, 5, 5, 4, 4, 0, 0, 1, 0x7D
+ }, new short[] {
+ 0x01, 0x02, 0x03, 0x00, 0x04, 0x11, 0x05, 0x12, 0x21, 0x31, 0x41, 0x06, 0x13, 0x51,
+ 0x61, 0x07, 0x22, 0x71, 0x14, 0x32, 0x81, 0x91, 0xA1, 0x08, 0x23, 0x42, 0xB1, 0xC1,
+ 0x15, 0x52, 0xD1, 0xF0, 0x24, 0x33, 0x62, 0x72, 0x82, 0x09, 0x0A, 0x16, 0x17, 0x18,
+ 0x19, 0x1A, 0x25, 0x26, 0x27, 0x28, 0x29, 0x2A, 0x34, 0x35, 0x36, 0x37, 0x38, 0x39,
+ 0x3A, 0x43, 0x44, 0x45, 0x46, 0x47, 0x48, 0x49, 0x4A, 0x53, 0x54, 0x55, 0x56, 0x57,
+ 0x58, 0x59, 0x5A, 0x63, 0x64, 0x65, 0x66, 0x67, 0x68, 0x69, 0x6A, 0x73, 0x74, 0x75,
+ 0x76, 0x77, 0x78, 0x79, 0x7A, 0x83, 0x84, 0x85, 0x86, 0x87, 0x88, 0x89, 0x8A, 0x92,
+ 0x93, 0x94, 0x95, 0x96, 0x97, 0x98, 0x99, 0x9A, 0xA2, 0xA3, 0xA4, 0xA5, 0xA6, 0xA7,
+ 0xA8, 0xA9, 0xAA, 0xB2, 0xB3, 0xB4, 0xB5, 0xB6, 0xB7, 0xB8, 0xB9, 0xBA, 0xC2, 0xC3,
+ 0xC4, 0xC5, 0xC6, 0xC7, 0xC8, 0xC9, 0xCA, 0xD2, 0xD3, 0xD4, 0xD5, 0xD6, 0xD7, 0xD8,
+ 0xD9, 0xDA, 0xE1, 0xE2, 0xE3, 0xE4, 0xE5, 0xE6, 0xE7, 0xE8, 0xE9, 0xEA, 0xF1, 0xF2,
+ 0xF3, 0xF4, 0xF5, 0xF6, 0xF7, 0xF8, 0xF9, 0xFA
+ }, false);
+
+ /**
+ * The standard AC chrominance Huffman table.
+ */
+ public static final JPEGHuffmanTable StdACChrominance = new JPEGHuffmanTable(new short[] {
+ 0, 2, 1, 2, 4, 4, 3, 4, 7, 5, 4, 4, 0, 1, 2, 0x77
+ }, new short[] {
+ 0x00, 0x01, 0x02, 0x03, 0x11, 0x04, 0x05, 0x21, 0x31, 0x06, 0x12, 0x41, 0x51, 0x07,
+ 0x61, 0x71, 0x13, 0x22, 0x32, 0x81, 0x08, 0x14, 0x42, 0x91, 0xA1, 0xB1, 0xC1, 0x09,
+ 0x23, 0x33, 0x52, 0xF0, 0x15, 0x62, 0x72, 0xD1, 0x0A, 0x16, 0x24, 0x34, 0xE1, 0x25,
+ 0xF1, 0x17, 0x18, 0x19, 0x1A, 0x26, 0x27, 0x28, 0x29, 0x2A, 0x35, 0x36, 0x37, 0x38,
+ 0x39, 0x3A, 0x43, 0x44, 0x45, 0x46, 0x47, 0x48, 0x49, 0x4A, 0x53, 0x54, 0x55, 0x56,
+ 0x57, 0x58, 0x59, 0x5A, 0x63, 0x64, 0x65, 0x66, 0x67, 0x68, 0x69, 0x6A, 0x73, 0x74,
+ 0x75, 0x76, 0x77, 0x78, 0x79, 0x7A, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87, 0x88, 0x89,
+ 0x8A, 0x92, 0x93, 0x94, 0x95, 0x96, 0x97, 0x98, 0x99, 0x9A, 0xA2, 0xA3, 0xA4, 0xA5,
+ 0xA6, 0xA7, 0xA8, 0xA9, 0xAA, 0xB2, 0xB3, 0xB4, 0xB5, 0xB6, 0xB7, 0xB8, 0xB9, 0xBA,
+ 0xC2, 0xC3, 0xC4, 0xC5, 0xC6, 0xC7, 0xC8, 0xC9, 0xCA, 0xD2, 0xD3, 0xD4, 0xD5, 0xD6,
+ 0xD7, 0xD8, 0xD9, 0xDA, 0xE2, 0xE3, 0xE4, 0xE5, 0xE6, 0xE7, 0xE8, 0xE9, 0xEA, 0xF2,
+ 0xF3, 0xF4, 0xF5, 0xF6, 0xF7, 0xF8, 0xF9, 0xFA
+ }, false);
+
+ /**
+ * The lengths.
+ */
private short lengths[];
-
- /** The values. */
+
+ /**
+ * The values.
+ */
private short values[];
/**
* Instantiates a new jPEG huffman table.
*
- * @param lengths the lengths
- * @param values the values
- * @param copy the copy
+ * @param lengths
+ * the lengths
+ * @param values
+ * the values
+ * @param copy
+ * the copy
*/
JPEGHuffmanTable(short[] lengths, short[] values, boolean copy) {
// Construction of standard tables without checks
@@ -106,9 +114,11 @@ public class JPEGHuffmanTable {
/**
* Instantiates a new JPEGHuffmanTable.
*
- * @param lengths the array of shorts lengths.
- * @param values the array of shorts containing
- * the values in order of increasing code length.
+ * @param lengths
+ * the array of shorts lengths.
+ * @param values
+ * the array of shorts containing the values in order of
+ * increasing code length.
*/
public JPEGHuffmanTable(short[] lengths, short[] values) {
if (lengths == null) {
@@ -145,8 +155,8 @@ public class JPEGHuffmanTable {
/**
* Gets an array of lengths in the Huffman table.
*
- * @return the array of short values representing the
- * length values in the Huffman table.
+ * @return the array of short values representing the length values in the
+ * Huffman table.
*/
public short[] getLengths() {
short newLengths[] = new short[lengths.length];
@@ -155,8 +165,7 @@ public class JPEGHuffmanTable {
}
/**
- * Gets an array of values represented by increasing length of
- * their codes.
+ * Gets an array of values represented by increasing length of their codes.
*
* @return the array of values.
*/
@@ -169,8 +178,10 @@ public class JPEGHuffmanTable {
/**
* Check huffman table.
*
- * @param lengths the lengths
- * @param values the values
+ * @param lengths
+ * the lengths.
+ * @param values
+ * the values.
*/
private static void checkHuffmanTable(short[] lengths, short[] values) {
int numLeaves = 0;
@@ -179,13 +190,15 @@ public class JPEGHuffmanTable {
numLeaves += length;
possibleLeaves -= length;
if (possibleLeaves < 0) {
- throw new IllegalArgumentException("Invalid Huffman table provided, lengths are incorrect.");
+ throw new IllegalArgumentException(
+ "Invalid Huffman table provided, lengths are incorrect.");
}
possibleLeaves <<= 1;
}
if (values.length != numLeaves) {
- throw new IllegalArgumentException("Invalid Huffman table provided, sum of lengths != values.");
+ throw new IllegalArgumentException(
+ "Invalid Huffman table provided, sum of lengths != values.");
}
}
generated by cgit v1.1 at 2025-01-30 05:11:24 +0000