+public class SideInfoBuffer {
+
+ /**
+ * The frame buffer that holds the data for the current frame.
+ */
+ private final int[] framebuffer = new int[BUFFER_INT_SIZE];
+
+ /**
+ * Maximum size of the frame buffer.
+ */
+ private static final int BUFFER_INT_SIZE = 433;
+
+ /**
+ * Index into <code>framebuffer</code> where the next bits are retrieved.
+ */
+ private int wordpointer;
+
+ /**
+ * Number (0-31, from MSB to LSB) of next bit for get_bits()
+ */
+ private int bitindex;
+
+ private int main_data_begin;
+
+ public int getMain_data_begin() {
+ return main_data_begin;
+ }
+
+ public void setMain_data_begin(int main_data_begin) {
+ this.main_data_begin = main_data_begin;
+ }
+
+ private final int bitmask[] = {
+ 0, // dummy
+ 0x00000001, 0x00000003, 0x00000007, 0x0000000F, 0x0000001F,
+ 0x0000003F, 0x0000007F, 0x000000FF, 0x000001FF, 0x000003FF,
+ 0x000007FF, 0x00000FFF, 0x00001FFF, 0x00003FFF, 0x00007FFF,
+ 0x0000FFFF, 0x0001FFFF };
+
+ public int get_bits(int number_of_bits) {
+ int returnvalue = 0;
+ int sum = bitindex + number_of_bits;
+ // System.out.println("bitindex=" + bitindex + " wordpointer="
+ // + wordpointer);
+ // E.B
+ // There is a problem here, wordpointer could be -1 ?!
+ if (wordpointer < 0)
+ wordpointer = 0;
+ // E.B : End.
+
+ if (sum <= 32) {
+ // all bits contained in *wordpointer
+ returnvalue = (framebuffer[wordpointer] >>> (32 - sum))
+ & bitmask[number_of_bits];
+ // returnvalue = (wordpointer[0] >> (32 - sum)) &
+ // bitmask[number_of_bits];
+ if ((bitindex += number_of_bits) == 32) {
+ bitindex = 0;
+ wordpointer++; // added by me!
+ }
+ return returnvalue;
+ }
+
+ // E.B : Check that ?
+ // ((short[])&returnvalue)[0] = ((short[])wordpointer + 1)[0];
+ // wordpointer++; // Added by me!
+ // ((short[])&returnvalue + 1)[0] = ((short[])wordpointer)[0];
+ int Right = (framebuffer[wordpointer] & 0x0000FFFF);
+ wordpointer++;
+ int Left = (framebuffer[wordpointer] & 0xFFFF0000);
+ returnvalue = ((Right << 16) & 0xFFFF0000)
+ | ((Left >>> 16) & 0x0000FFFF);
+
+ returnvalue >>>= 48 - sum; // returnvalue >>= 16 - (number_of_bits - (32
+ // - bitindex))
+ returnvalue &= bitmask[number_of_bits];
+ bitindex = sum - 32;
+ return returnvalue;
+ }
+
+ public void setBuffer(int idx, int value) {
+ framebuffer[idx] = value;
+ }
+
+}