package org.jcodec.codecs.vpx;
import java.io.IOException;
/**
* This class is part of JCodec ( www.jcodec.org ) This software is distributed
* under FreeBSD License
*
* @author The JCodec project
*
*/
public class VP8Util {
public static int BLOCK_TYPES = 4;
public static int COEF_BANDS = 8;
public static int PREV_COEF_CONTEXTS = 3;
public static int MAX_ENTROPY_TOKENS = 12;
public static int MAX_MODE_LF_DELTAS = 4;
public static int MAX_REF_LF_DELTAS = 4;
public static final int MB_FEATURE_TREE_PROBS = 3;
/**
* delta() is the process to read 5 bits from the bitstream to determine a signed delta value:
*
* +-------+--------------------------------------------------+
* | Index | Description |
* +-------+--------------------------------------------------+
* | L(4) | Magnitude of delta |
* | L(1) | Sign of delta, 0 for positive and 1 for negative |
* +-------+--------------------------------------------------+
*
* @param bc
* @return
* @throws IOException
*/
public static int delta(VPXBooleanDecoder bc) {
int magnitude = bc.decodeInt(4);
if (bc.decodeBit() > 0)
magnitude = -magnitude;
return magnitude;
}
public static class SubblockConstants {
/**
* predict DC using row above and column to the left
*/
public static final int B_DC_PRED = 0;
/**
* propagate second differences a la "true motion"
*/
public static final int B_TM_PRED = 1;
/**
* predict rows using row above
*/
public static final int B_VE_PRED = 2;
/**
* predict columns using column to the left
*/
public static final int B_HE_PRED = 3;
/**
* southwest (left and down) 45 degree diagonal prediction
*/
public static final int B_LD_PRED = 4;
/**
* southeast (right and down) ""
*/
public static final int B_RD_PRED = 5;
/**
* SSE (vertical right) diagonal prediction
*/
public static final int B_VR_PRED = 6;
/**
* SSW (vertical left) ""
*/
public static final int B_VL_PRED = 7;
/**
* ESE (horizontal down) ""
*/
public static final int B_HD_PRED = 8;
/**
* ENE (horizontal up) ""
*/
public static final int B_HU_PRED = 9;
/**
* predict DC using row above and column to the left
*/
public static final int DC_PRED = 0;
/**
* predict rows using row above
*/
public static final int V_PRED = 1;
/**
* predict columns using column to the left
*/
public static final int H_PRED = 2;
/**
* propagate second differences a la "true motion"
*/
public static final int TM_PRED = 3;
/**
* each Y subblock is independently predicted
*/
public static final int B_PRED = 4;
/** exact value: 0 */
public static final int DCT_0 = 0;
/** exact value: 1 */
public static final int DCT_1 = 1;
/** exact value: 2 */
public static final int DCT_2 = 2;
/** exact value: 3 */
public static final int DCT_3 = 3;
/** exact value: 4 */
public static final int DCT_4 = 4;
/** value range: [5,6] */
public static final int cat_5_6 = 5;
/** value range: [7, 8, 9, 10] size == 4 */
public static final int cat_7_10 = 6;
/** value range: [11, 12, 13, 14, 15, 16, 17, 18] size == 8 */
public static final int cat_11_18 = 7;
/** value range: [19 - 34] size == 16 */
public static final int cat_19_34 = 8;
/** value range: [35 - 66] size == 32 */
public static final int cat_35_66 = 9;
/** value range: [67 - 2048] size == 1982 */
public static final int cat_67_2048 = 10;
/** end of block */
public static final int dct_eob = 11;
/**
* <pre>
* <root>
* / \
* dct_eob 2
* / \
* DCO_0 4
* / \
* DCT_1 \
* 6-------+
* / \
* / \
* 8 \
* / \ \
* DCT_2 10 \
* / \ 12-----+
* DCT_3 DCY_4 / \
* 14 16
* / \ / \
* cat1 cat2 / \
* 18 20----+
* / \ | \
* cat3 cat4 cat5 cat6
* </pre>
*/
public static final int vp8CoefTree[] = {
-SubblockConstants.dct_eob, 2, /* eob = "0" */
-SubblockConstants.DCT_0, 4, /* 0 = "10" */
-SubblockConstants.DCT_1, 6, /* 1 = "110" */
8, 12,
-SubblockConstants.DCT_2, 10, /* 2 = "11100" */
-SubblockConstants.DCT_3, -SubblockConstants.DCT_4, /* 3 = "111010", 4 = "111011" */
14, 16,
-SubblockConstants.cat_5_6, -SubblockConstants.cat_7_10, /* cat1 = "111100", cat2 = "111101" */
18, 20,
-SubblockConstants.cat_11_18, -SubblockConstants.cat_19_34, /* cat3 = "1111100", cat4 = "1111101" */
-SubblockConstants.cat_35_66, -SubblockConstants.cat_67_2048 /* cat4 = "1111110", cat4 = "1111111" */
};
public static final int vp8CoefBands[] = { 0, 1, 2, 3, 6, 4, 5, 6, 6, 6, 6,
6, 6, 6, 6, 7 };
/**
* <pre>
* 0---1 2---3
* / / /
* 4 5 6 7
* | / / / |
* 8 9 10 11
* / / /
* 12--13 14--15
* </pre>
*
*/
public static final int vp8defaultZigZag1d[] = {
0, 1, 4, 8,
5, 2, 3, 6,
9, 12, 13, 10,
7, 11, 14, 15, };
/**
*
* <pre>
* <root>
* / \
* B_DC_PRED 2
* / \
* B_TM_PRED 4
* / \
* B_VE_PRED 6---------------------+
* / \
* 8 12
* / \ / \
* B_HE_PRED 10 B_LD_PRED 14
* / \ / \
* B_RD_PRED B_VR_PRED B_VL_PRED 16
* / \
* B_HD_PRED B_HU_PRED
* </pre>
*/
public static int subblockModeTree[] = {
-B_DC_PRED, 2, /* B_DC_PRED = "0" */
-B_TM_PRED, 4, /* B_TM_PRED = "10" */
-B_VE_PRED, 6, /* B_VE_PRED = "110" */
8, 12,
-B_HE_PRED, 10, /* B_HE_PRED = "1110" */
-B_RD_PRED, -B_VR_PRED, /* B_RD_PRED = "111100", B_VR_PRED = "111101" */
-B_LD_PRED, 14, /* B_LD_PRED = "111110" */
-B_VL_PRED, 16, /* B_VL_PRED = "1111110" */
-B_HD_PRED, -B_HU_PRED /* HD = "11111110", HU = "11111111" */
};
public final static int Pcat1[] = { 159, 0 };
public final static int Pcat2[] = { 165, 145, 0 };
public final static int Pcat3[] = { 173, 148, 140, 0 };
public final static int Pcat4[] = { 176, 155, 140, 135, 0 };
public final static int Pcat5[] = { 180, 157, 141, 134, 130, 0 };
public final static int Pcat6[] = { 254, 254, 243, 230, 196, 177, 153, 140,
133, 130, 129, 0 };
public static int keyFrameSubblockModeProb[][][] = {
{ { 231, 120, 48, 89, 115, 113, 120, 152, 112 },
{ 152, 179, 64, 126, 170, 118, 46, 70, 95 },
{ 175, 69, 143, 80, 85, 82, 72, 155, 103 },
{ 56, 58, 10, 171, 218, 189, 17, 13, 152 },
{ 144, 71, 10, 38, 171, 213, 144, 34, 26 },
{ 114, 26, 17, 163, 44, 195, 21, 10, 173 },
{ 121, 24, 80, 195, 26, 62, 44, 64, 85 },
{ 170, 46, 55, 19, 136, 160, 33, 206, 71 },
{ 63, 20, 8, 114, 114, 208, 12, 9, 226 },
{ 81, 40, 11, 96, 182, 84, 29, 16, 36 } },
{ { 134, 183, 89, 137, 98, 101, 106, 165, 148 },
{ 72, 187, 100, 130, 157, 111, 32, 75, 80 },
{ 66, 102, 167, 99, 74, 62, 40, 234, 128 },
{ 41, 53, 9, 178, 241, 141, 26, 8, 107 },
{ 104, 79, 12, 27, 217, 255, 87, 17, 7 },
{ 74, 43, 26, 146, 73, 166, 49, 23, 157 },
{ 65, 38, 105, 160, 51, 52, 31, 115, 128 },
{ 87, 68, 71, 44, 114, 51, 15, 186, 23 },
{ 47, 41, 14, 110, 182, 183, 21, 17, 194 },
{ 66, 45, 25, 102, 197, 189, 23, 18, 22 } },
{ { 88, 88, 147, 150, 42, 46, 45, 196, 205 },
{ 43, 97, 183, 117, 85, 38, 35, 179, 61 },
{ 39, 53, 200, 87, 26, 21, 43, 232, 171 },
{ 56, 34, 51, 104, 114, 102, 29, 93, 77 },
{ 107, 54, 32, 26, 51, 1, 81, 43, 31 },
{ 39, 28, 85, 171, 58, 165, 90, 98, 64 },
{ 34, 22, 116, 206, 23, 34, 43, 166, 73 },
{ 68, 25, 106, 22, 64, 171, 36, 225, 114 },
{ 34, 19, 21, 102, 132, 188, 16, 76, 124 },
{ 62, 18, 78, 95, 85, 57, 50, 48, 51 } },
{ { 193, 101, 35, 159, 215, 111, 89, 46, 111 },
{ 60, 148, 31, 172, 219, 228, 21, 18, 111 },
{ 112, 113, 77, 85, 179, 255, 38, 120, 114 },
{ 40, 42, 1, 196, 245, 209, 10, 25, 109 },
{ 100, 80, 8, 43, 154, 1, 51, 26, 71 },
{ 88, 43, 29, 140, 166, 213, 37, 43, 154 },
{ 61, 63, 30, 155, 67, 45, 68, 1, 209 },
{ 142, 78, 78, 16, 255, 128, 34, 197, 171 },
{ 41, 40, 5, 102, 211, 183, 4, 1, 221 },
{ 51, 50, 17, 168, 209, 192, 23, 25, 82 } },
{ { 125, 98, 42, 88, 104, 85, 117, 175, 82 },
{ 95, 84, 53, 89, 128, 100, 113, 101, 45 },
{ 75, 79, 123, 47, 51, 128, 81, 171, 1 },
{ 57, 17, 5, 71, 102, 57, 53, 41, 49 },
{ 115, 21, 2, 10, 102, 255, 166, 23, 6 },
{ 38, 33, 13, 121, 57, 73, 26, 1, 85 },
{ 41, 10, 67, 138, 77, 110, 90, 47, 114 },
{ 101, 29, 16, 10, 85, 128, 101, 196, 26 },
{ 57, 18, 10, 102, 102, 213, 34, 20, 43 },
{ 117, 20, 15, 36, 163, 128, 68, 1, 26 } },
{ { 138, 31, 36, 171, 27, 166, 38, 44, 229 },
{ 67, 87, 58, 169, 82, 115, 26, 59, 179 },
{ 63, 59, 90, 180, 59, 166, 93, 73, 154 },
{ 40, 40, 21, 116, 143, 209, 34, 39, 175 },
{ 57, 46, 22, 24, 128, 1, 54, 17, 37 },
{ 47, 15, 16, 183, 34, 223, 49, 45, 183 },
{ 46, 17, 33, 183, 6, 98, 15, 32, 183 },
{ 65, 32, 73, 115, 28, 128, 23, 128, 205 },
{ 40, 3, 9, 115, 51, 192, 18, 6, 223 },
{ 87, 37, 9, 115, 59, 77, 64, 21, 47 } },
{ { 104, 55, 44, 218, 9, 54, 53, 130, 226 },
{ 64, 90, 70, 205, 40, 41, 23, 26, 57 },
{ 54, 57, 112, 184, 5, 41, 38, 166, 213 },
{ 30, 34, 26, 133, 152, 116, 10, 32, 134 },
{ 75, 32, 12, 51, 192, 255, 160, 43, 51 },
{ 39, 19, 53, 221, 26, 114, 32, 73, 255 },
{ 31, 9, 65, 234, 2, 15, 1, 118, 73 },
{ 88, 31, 35, 67, 102, 85, 55, 186, 85 },
{ 56, 21, 23, 111, 59, 205, 45, 37, 192 },
{ 55, 38, 70, 124, 73, 102, 1, 34, 98 } },
{ { 102, 61, 71, 37, 34, 53, 31, 243, 192 },
{ 69, 60, 71, 38, 73, 119, 28, 222, 37 },
{ 68, 45, 128, 34, 1, 47, 11, 245, 171 },
{ 62, 17, 19, 70, 146, 85, 55, 62, 70 },
{ 75, 15, 9, 9, 64, 255, 184, 119, 16 },
{ 37, 43, 37, 154, 100, 163, 85, 160, 1 },
{ 63, 9, 92, 136, 28, 64, 32, 201, 85 },
{ 86, 6, 28, 5, 64, 255, 25, 248, 1 },
{ 56, 8, 17, 132, 137, 255, 55, 116, 128 },
{ 58, 15, 20, 82, 135, 57, 26, 121, 40 } },
{ { 164, 50, 31, 137, 154, 133, 25, 35, 218 },
{ 51, 103, 44, 131, 131, 123, 31, 6, 158 },
{ 86, 40, 64, 135, 148, 224, 45, 183, 128 },
{ 22, 26, 17, 131, 240, 154, 14, 1, 209 },
{ 83, 12, 13, 54, 192, 255, 68, 47, 28 },
{ 45, 16, 21, 91, 64, 222, 7, 1, 197 },
{ 56, 21, 39, 155, 60, 138, 23, 102, 213 },
{ 85, 26, 85, 85, 128, 128, 32, 146, 171 },
{ 18, 11, 7, 63, 144, 171, 4, 4, 246 },
{ 35, 27, 10, 146, 174, 171, 12, 26, 128 } },
{ { 190, 80, 35, 99, 180, 80, 126, 54, 45 },
{ 85, 126, 47, 87, 176, 51, 41, 20, 32 },
{ 101, 75, 128, 139, 118, 146, 116, 128, 85 },
{ 56, 41, 15, 176, 236, 85, 37, 9, 62 },
{ 146, 36, 19, 30, 171, 255, 97, 27, 20 },
{ 71, 30, 17, 119, 118, 255, 17, 18, 138 },
{ 101, 38, 60, 138, 55, 70, 43, 26, 142 },
{ 138, 45, 61, 62, 219, 1, 81, 188, 64 },
{ 32, 41, 20, 117, 151, 142, 20, 21, 163 },
{ 112, 19, 12, 61, 195, 128, 48, 4, 24 } } };
}
public static int[][][][] getDefaultCoefProbs() {
int r[][][][] = new int[vp8DefaultCoefProbs.length][vp8DefaultCoefProbs[0].length][vp8DefaultCoefProbs[0][0].length][vp8DefaultCoefProbs[0][0][0].length];
for (int i = 0; i < vp8DefaultCoefProbs.length; i++)
for (int j = 0; j < vp8DefaultCoefProbs[0].length; j++)
for (int k = 0; k < vp8DefaultCoefProbs[0][0].length; k++)
for (int l = 0; l < vp8DefaultCoefProbs[0][0][0].length; l++)
r[i][j][k][l] = vp8DefaultCoefProbs[i][j][k][l];
return r;
}
public static int vp8KeyFrameUVModeProb[] = { 142, 114, 183 };
/**
* <pre>
* +-----------------------------+
* | root |
* | / \ |
* | -DC_PRED 2 |
* | / \ |
* | -V_PRED 4 |
* | / \ |
* | -H_PRED -TM_PRED |
* +-----------------------------+
* </pre>
*
*/
public static int vp8UVModeTree[] = {
-SubblockConstants.DC_PRED, 2, /* root: DC_PRED = "0", "1" subtree*/
-SubblockConstants.V_PRED, 4, /* "1" subtree: V_PRED = "10", "11" subtree */
-SubblockConstants.H_PRED, -SubblockConstants.TM_PRED /* "11" subtree: H_PRED = "110", TM_PRED = "111" */
};
public static int keyFrameYModeProb[] = { 145, 156, 163, 128 };
/**
* Left branch is picked if 0 is decoded, right branch is picked
* if 1 is decoded. Positive value of the node tells the index
* of the left-most child. Negative value implies leaf node (no
* children), with corresponding absolute value.
*
* 0 implies B_PRED is returned.
* 100 implies DC_PRED is returned.
* 101 implies V_PRED is returned
* 110 - H_PRED
* 111 - TM_PRED
* <pre>
* +------------------------------------------+
* | root |
* | / \ |
* | -B_PRED 2------------ |
* | / \ |
* | 4 6---- |
* | / \ / \ |
* | -DC_PRED -V_PRED -H_PRED -TM_PRED |
* +------------------------------------------+
* </pre>
*
*/
public static int keyFrameYModeTree[] = {
-SubblockConstants.B_PRED, 2,
4, 6,
-SubblockConstants.DC_PRED, -SubblockConstants.V_PRED,
-SubblockConstants.H_PRED, -SubblockConstants.TM_PRED };
public static int segmentTree[] = {
2, 4, /* root: "0", "1" subtrees */
-0, -1, /* "00" = 0th value, "01" = 1st value */
-2, -3 /* "10" = 2nd value, "11" = 3rd value */
};
public static int getBitInBytes(byte[] bs, int i) {
int byteIndex = i >> 3;
int bitIndex = i & 0x7;
return (bs[byteIndex] >> bitIndex) & 0x01;
}
public static int getBitsInBytes(byte[] bytes, int idx, int len){
int val = 0;
for(int i=0;i<len;i++)
val |= getBitInBytes(bytes, idx+i) << i;
return val;
}
public static int getMacroblockCount(int dimention){
if ((dimention & 15) != 0)
dimention += 16 - (dimention & 15);
return dimention >> 4; // same as dimention/16
}
public static final int[] PRED_BLOCK_127 = new int[] { 127, 127, 127, 127, 127, 127, 127, 127, 127, 127, 127, 127, 127, 127, 127, 127 };
public static final int[] PRED_BLOCK_129 = new int[] { 129, 129, 129, 129, 129, 129, 129, 129, 129, 129, 129, 129, 129, 129, 129, 129 };
public static int[] pickDefaultPrediction(int intra_bmode) {
if (intra_bmode == SubblockConstants.B_TM_PRED || intra_bmode == SubblockConstants.B_DC_PRED || intra_bmode == SubblockConstants.B_VE_PRED || intra_bmode == SubblockConstants.B_HE_PRED || intra_bmode == SubblockConstants.B_VR_PRED || intra_bmode == SubblockConstants.B_RD_PRED || intra_bmode == SubblockConstants.B_HD_PRED)
return PRED_BLOCK_129;
return PRED_BLOCK_127;
}
public static class QuantizationParams {
int yAC;
int yDC;
int y2DC;
int y2AC;
int chromaDC;
int chromaAC;
public static final int dcQLookup[] = { 4, 5, 6, 7, 8, 9, 10, 10, 11,
12, 13, 14, 15, 16, 17, 17, 18, 19, 20, 20, 21, 21, 22, 22, 23, 23,
24, 25, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 37, 38,
39, 40, 41, 42, 43, 44, 45, 46, 46, 47, 48, 49, 50, 51, 52, 53, 54,
55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71,
72, 73, 74, 75, 76, 76, 77, 78, 79, 80, 81, 82, 83, 84, 85, 86, 87,
88, 89, 91, 93, 95, 96, 98, 100, 101, 102, 104, 106, 108, 110, 112,
114, 116, 118, 122, 124, 126, 128, 130, 132, 134, 136, 138, 140,
143, 145, 148, 151, 154, 157, };
public static final int acQLookup[] = { 4, 5, 6, 7, 8, 9, 10, 11, 12,
13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29,
30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46,
47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 60, 62, 64, 66, 68,
70, 72, 74, 76, 78, 80, 82, 84, 86, 88, 90, 92, 94, 96, 98, 100,
102, 104, 106, 108, 110, 112, 114, 116, 119, 122, 125, 128, 131,
134, 137, 140, 143, 146, 149, 152, 155, 158, 161, 164, 167, 170,
173, 177, 181, 185, 189, 193, 197, 201, 205, 209, 213, 217, 221,
225, 229, 234, 239, 245, 249, 254, 259, 264, 269, 274, 279, 284, };
public QuantizationParams(int baseIndex, int ydcIndexDelta, int y2dcIndexDelta, int y2acIndexDelta, int chromaDCIndexDelta, int chromaACIndexDelta) {
// if (!segmentation_enabled) {
// setQindex(yacQi);
// } else if (!mb_segement_abs_delta) {
// setQindex(getQindex() + yacQi);
// }
this.yAC = acQLookup[clip(baseIndex, 127)];
this.yDC = dcQLookup[clip(baseIndex + ydcIndexDelta, 127)];
this.y2DC = dcQLookup[clip(baseIndex + y2dcIndexDelta, 127)] * 2;
this.y2AC = acQLookup[clip(baseIndex + y2acIndexDelta, 127)] * 155 / 100;
if (this.y2AC < 8)
this.y2AC = 8;
this.chromaDC = dcQLookup[clip(baseIndex + chromaDCIndexDelta, 127)];
this.chromaAC = acQLookup[clip(baseIndex + chromaACIndexDelta, 127)];
}
private static int clip(int val, int max) {
if (val > max)
return max;
if (val < 0)
return 0;
return val;
}
public static int clip255(int val) {
if (val > 255)
return 255;
if (val < 0)
return 0;
return val;
}
}
public static enum PLANE {
U, V, Y1, Y2
}
private static int vp8DefaultCoefProbs[][][][] = new int[][][][] {
{ { { 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128 }, { 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128 }, { 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128 } },
{ { 253, 136, 254, 255, 228, 219, 128, 128, 128, 128, 128 }, { 189, 129, 242, 255, 227, 213, 255, 219, 128, 128, 128 }, { 106, 126, 227, 252, 214, 209, 255, 255, 128, 128, 128 } },
{ { 1, 98, 248, 255, 236, 226, 255, 255, 128, 128, 128 }, { 181, 133, 238, 254, 221, 234, 255, 154, 128, 128, 128 }, { 78, 134, 202, 247, 198, 180, 255, 219, 128, 128, 128 } },
{ { 1, 185, 249, 255, 243, 255, 128, 128, 128, 128, 128 }, { 184, 150, 247, 255, 236, 224, 128, 128, 128, 128, 128 }, { 77, 110, 216, 255, 236, 230, 128, 128, 128, 128, 128 } },
{ { 1, 101, 251, 255, 241, 255, 128, 128, 128, 128, 128 }, { 170, 139, 241, 252, 236, 209, 255, 255, 128, 128, 128 }, { 37, 116, 196, 243, 228, 255, 255, 255, 128, 128, 128 } }, {
{ 1, 204, 254, 255, 245, 255, 128, 128, 128, 128, 128 }, { 207, 160, 250, 255, 238, 128, 128, 128, 128, 128, 128 }, { 102, 103, 231, 255, 211, 171, 128, 128, 128, 128, 128 } },
{ { 1, 152, 252, 255, 240, 255, 128, 128, 128, 128, 128 }, { 177, 135, 243, 255, 234, 225, 128, 128, 128, 128, 128 }, { 80, 129, 211, 255, 194, 224, 128, 128, 128, 128, 128 } },
{ { 1, 1, 255, 128, 128, 128, 128, 128, 128, 128, 128 }, { 246, 1, 255, 128, 128, 128, 128, 128, 128, 128, 128 }, { 255, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128 } } },
{ { { 198, 35, 237, 223, 193, 187, 162, 160, 145, 155, 62 }, { 131, 45, 198, 221, 172, 176, 220, 157, 252, 221, 1 }, { 68, 47, 146, 208, 149, 167, 221, 162, 255, 223, 128 } },
{ { 1, 149, 241, 255, 221, 224, 255, 255, 128, 128, 128 }, { 184, 141, 234, 253, 222, 220, 255, 199, 128, 128, 128 }, { 81, 99, 181, 242, 176, 190, 249, 202, 255, 255, 128 } },
{ { 1, 129, 232, 253, 214, 197, 242, 196, 255, 255, 128 }, { 99, 121, 210, 250, 201, 198, 255, 202, 128, 128, 128 }, { 23, 91, 163, 242, 170, 187, 247, 210, 255, 255, 128 } },
{ { 1, 200, 246, 255, 234, 255, 128, 128, 128, 128, 128 }, { 109, 178, 241, 255, 231, 245, 255, 255, 128, 128, 128 }, { 44, 130, 201, 253, 205, 192, 255, 255, 128, 128, 128 } },
{ { 1, 132, 239, 251, 219, 209, 255, 165, 128, 128, 128 }, { 94, 136, 225, 251, 218, 190, 255, 255, 128, 128, 128 }, { 22, 100, 174, 245, 186, 161, 255, 199, 128, 128, 128 } },
{ { 1, 182, 249, 255, 232, 235, 128, 128, 128, 128, 128 }, { 124, 143, 241, 255, 227, 234, 128, 128, 128, 128, 128 }, { 35, 77, 181, 251, 193, 211, 255, 205, 128, 128, 128 } },
{ { 1, 157, 247, 255, 236, 231, 255, 255, 128, 128, 128 }, { 121, 141, 235, 255, 225, 227, 255, 255, 128, 128, 128 }, { 45, 99, 188, 251, 195, 217, 255, 224, 128, 128, 128 } },
{ { 1, 1, 251, 255, 213, 255, 128, 128, 128, 128, 128 }, { 203, 1, 248, 255, 255, 128, 128, 128, 128, 128, 128 }, { 137, 1, 177, 255, 224, 255, 128, 128, 128, 128, 128 } } },
{ { { 253, 9, 248, 251, 207, 208, 255, 192, 128, 128, 128 }, { 175, 13, 224, 243, 193, 185, 249, 198, 255, 255, 128 }, { 73, 17, 171, 221, 161, 179, 236, 167, 255, 234, 128 } },
{ { 1, 95, 247, 253, 212, 183, 255, 255, 128, 128, 128 }, { 239, 90, 244, 250, 211, 209, 255, 255, 128, 128, 128 }, { 155, 77, 195, 248, 188, 195, 255, 255, 128, 128, 128 } },
{ { 1, 24, 239, 251, 218, 219, 255, 205, 128, 128, 128 }, { 201, 51, 219, 255, 196, 186, 128, 128, 128, 128, 128 }, { 69, 46, 190, 239, 201, 218, 255, 228, 128, 128, 128 } },
{ { 1, 191, 251, 255, 255, 128, 128, 128, 128, 128, 128 }, { 223, 165, 249, 255, 213, 255, 128, 128, 128, 128, 128 }, { 141, 124, 248, 255, 255, 128, 128, 128, 128, 128, 128 } },
{ { 1, 16, 248, 255, 255, 128, 128, 128, 128, 128, 128 }, { 190, 36, 230, 255, 236, 255, 128, 128, 128, 128, 128 }, { 149, 1, 255, 128, 128, 128, 128, 128, 128, 128, 128 } },
{ { 1, 226, 255, 128, 128, 128, 128, 128, 128, 128, 128 }, { 247, 192, 255, 128, 128, 128, 128, 128, 128, 128, 128 }, { 240, 128, 255, 128, 128, 128, 128, 128, 128, 128, 128 } },
{ { 1, 134, 252, 255, 255, 128, 128, 128, 128, 128, 128 }, { 213, 62, 250, 255, 255, 128, 128, 128, 128, 128, 128 }, { 55, 93, 255, 128, 128, 128, 128, 128, 128, 128, 128 } },
{ { 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128 }, { 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128 }, { 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128 } } },
{ { { 202, 24, 213, 235, 186, 191, 220, 160, 240, 175, 255 }, { 126, 38, 182, 232, 169, 184, 228, 174, 255, 187, 128 }, { 61, 46, 138, 219, 151, 178, 240, 170, 255, 216, 128 } },
{ { 1, 112, 230, 250, 199, 191, 247, 159, 255, 255, 128 }, { 166, 109, 228, 252, 211, 215, 255, 174, 128, 128, 128 }, { 39, 77, 162, 232, 172, 180, 245, 178, 255, 255, 128 } },
{ { 1, 52, 220, 246, 198, 199, 249, 220, 255, 255, 128 }, { 124, 74, 191, 243, 183, 193, 250, 221, 255, 255, 128 }, { 24, 71, 130, 219, 154, 170, 243, 182, 255, 255, 128 }
}, { { 1, 182, 225, 249, 219, 240, 255, 224, 128, 128, 128 }, { 149, 150, 226, 252, 216, 205, 255, 171, 128, 128, 128 }, { 28, 108, 170, 242, 183, 194, 254, 223, 255, 255, 128 } },
{ { 1, 81, 230, 252, 204, 203, 255, 192, 128, 128, 128 }, { 123, 102, 209, 247, 188, 196, 255, 233, 128, 128, 128 }, { 20, 95, 153, 243, 164, 173, 255, 203, 128, 128, 128 } },
{ { 1, 222, 248, 255, 216, 213, 128, 128, 128, 128, 128 }, { 168, 175, 246, 252, 235, 205, 255, 255, 128, 128, 128 }, { 47, 116, 215, 255, 211, 212, 255, 255, 128, 128, 128 } },
{ { 1, 121, 236, 253, 212, 214, 255, 255, 128, 128, 128 }, { 141, 84, 213, 252, 201, 202, 255, 219, 128, 128, 128 }, { 42, 80, 160, 240, 162, 185, 255, 205, 128, 128, 128 } },
{ { 1, 1, 255, 128, 128, 128, 128, 128, 128, 128, 128 }, { 244, 1, 255, 128, 128, 128, 128, 128, 128, 128, 128 }, { 238, 1, 255, 128, 128, 128, 128, 128, 128, 128, 128 } } } };
static int vp8CoefUpdateProbs[][][][] = new int[][][][] {
{ { { 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 }, { 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 }, { 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 } },
{ { 176, 246, 255, 255, 255, 255, 255, 255, 255, 255, 255 }, { 223, 241, 252, 255, 255, 255, 255, 255, 255, 255, 255 }, { 249, 253, 253, 255, 255, 255, 255, 255, 255, 255, 255 } },
{ { 255, 244, 252, 255, 255, 255, 255, 255, 255, 255, 255 }, { 234, 254, 254, 255, 255, 255, 255, 255, 255, 255, 255 }, { 253, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 } },
{ { 255, 246, 254, 255, 255, 255, 255, 255, 255, 255, 255 }, { 239, 253, 254, 255, 255, 255, 255, 255, 255, 255, 255 }, { 254, 255, 254, 255, 255, 255, 255, 255, 255, 255, 255 } },
{ { 255, 248, 254, 255, 255, 255, 255, 255, 255, 255, 255 }, { 251, 255, 254, 255, 255, 255, 255, 255, 255, 255, 255 }, { 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 } },
{ { 255, 253, 254, 255, 255, 255, 255, 255, 255, 255, 255 }, { 251, 254, 254, 255, 255, 255, 255, 255, 255, 255, 255 }, { 254, 255, 254, 255, 255, 255, 255, 255, 255, 255, 255 } },
{ { 255, 254, 253, 255, 254, 255, 255, 255, 255, 255, 255 }, { 250, 255, 254, 255, 254, 255, 255, 255, 255, 255, 255 },
{ 254, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 } }, { { 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 }, { 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 }, { 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 } } },
{ { { 217, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 }, { 225, 252, 241, 253, 255, 255, 254, 255, 255, 255, 255 }, { 234, 250, 241, 250, 253, 255, 253, 254, 255, 255, 255 } },
{ { 255, 254, 255, 255, 255, 255, 255, 255, 255, 255, 255 }, { 223, 254, 254, 255, 255, 255, 255, 255, 255, 255, 255 }, { 238, 253, 254, 254, 255, 255, 255, 255, 255, 255, 255 } },
{ { 255, 248, 254, 255, 255, 255, 255, 255, 255, 255, 255 }, { 249, 254, 255, 255, 255, 255, 255, 255, 255, 255, 255 }, { 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 } },
{ { 255, 253, 255, 255, 255, 255, 255, 255, 255, 255, 255 }, { 247, 254, 255, 255, 255, 255, 255, 255, 255, 255, 255 }, { 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 } },
{ { 255, 253, 254, 255, 255, 255, 255, 255, 255, 255, 255 }, { 252, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 }, { 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 } },
{ { 255, 254, 254, 255, 255, 255, 255, 255, 255, 255, 255 }, { 253, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 }, { 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 } },
{ { 255, 254, 253, 255, 255, 255, 255, 255, 255, 255, 255 }, { 250, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 }, { 254, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 } },
{ { 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 }, { 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 }, { 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 } } },
{ { { 186, 251, 250, 255, 255, 255, 255, 255, 255, 255, 255 }, { 234, 251, 244, 254, 255, 255, 255, 255, 255, 255, 255 }, { 251, 251, 243, 253, 254, 255, 254, 255, 255, 255, 255 } }, {
{ 255, 253, 254, 255, 255, 255, 255, 255, 255, 255, 255 }, { 236, 253, 254, 255, 255, 255, 255, 255, 255, 255, 255 }, { 251, 253, 253, 254, 254, 255, 255, 255, 255, 255, 255 } },
{ { 255, 254, 254, 255, 255, 255, 255, 255, 255, 255, 255 }, { 254, 254, 254, 255, 255, 255, 255, 255, 255, 255, 255 }, { 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 } },
{ { 255, 254, 255, 255, 255, 255, 255, 255, 255, 255, 255 }, { 254, 254, 255, 255, 255, 255, 255, 255, 255, 255, 255 }, { 254, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 } },
{ { 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 }, { 254, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 }, { 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 } },
{ { 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 }, { 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 }, { 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 } },
{ { 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 }, { 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 }, { 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 } },
{ { 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 }, { 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 }, { 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 } } },
{ { { 248, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 }, { 250, 254, 252, 254, 255, 255, 255, 255, 255, 255, 255 }, { 248, 254, 249, 253, 255, 255, 255, 255, 255, 255, 255 } },
{ { 255, 253, 253, 255, 255, 255, 255, 255, 255, 255, 255 }, { 246, 253, 253, 255, 255, 255, 255, 255, 255, 255, 255 }, { 252, 254, 251, 254, 254, 255, 255, 255, 255, 255, 255 } },
{ { 255, 254, 252, 255, 255, 255, 255, 255, 255, 255, 255 }, { 248, 254, 253, 255, 255, 255, 255, 255, 255, 255, 255 }, { 253, 255, 254, 254, 255, 255, 255, 255, 255, 255, 255 } },
{ { 255, 251, 254, 255, 255, 255, 255, 255, 255, 255, 255 }, { 245, 251, 254, 255, 255, 255, 255, 255, 255, 255, 255 }, { 253, 253, 254, 255, 255, 255, 255, 255, 255, 255, 255 } }, {
{ 255, 251, 253, 255, 255, 255, 255, 255, 255, 255, 255 }, { 252, 253, 254, 255, 255, 255, 255, 255, 255, 255, 255 }, { 255, 254, 255, 255, 255, 255, 255, 255, 255, 255, 255 } },
{ { 255, 252, 255, 255, 255, 255, 255, 255, 255, 255, 255 }, { 249, 255, 254, 255, 255, 255, 255, 255, 255, 255, 255 }, { 255, 255, 254, 255, 255, 255, 255, 255, 255, 255, 255 } },
{ { 255, 255, 253, 255, 255, 255, 255, 255, 255, 255, 255 }, { 250, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 }, { 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 } },
{ { 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 }, { 254, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 }, { 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 } } } };
public static int[] predictHU(int[] left) {
int[] p = new int[16];
/**
* ENE (horizontal up) step = (1,-2) or (-1,2)
* predictor is from (1/2, -1)
*/
p[0 * 4 + 0] = avg2(left[0], left[1]);
/** (1, -1) */
p[0 * 4 + 1] = avg3(left[0], left[1], left[2]);
/** (3/2, -1) */
p[0 * 4 + 2] = p[1 * 4 + 0] = avg2(left[1], left[2]);
/** ( 2, -1) */
p[0 * 4 + 3] = p[1 * 4 + 1] = avg3(left[1], left[2], left[3]);
/** (5/2, -1) */
p[1 * 4 + 2] = p[2 * 4 + 0] = avg2(left[2], left[3]);
/** (3, -1) */
p[1 * 4 + 3] = p[2 * 4 + 1] = avg3(left[2], left[3], left[3]);
/**
* Not possible to follow pattern for much of the bottom row because no
* (nearby) already-constructed pixels lie on the diagonals in question.
*/
p[2 * 4 + 2] = p[2 * 4 + 3] = p[3 * 4 + 0] = p[3 * 4 + 1] = p[3 * 4 + 2] = p[3 * 4 + 3] = left[3];
return p;
}
public static int[] predictHD(int[] above, int[] left, int aboveLeft) {
int[] p = new int[16];
/** 9 already-constructed edge pixels */
int[] edge = new int[9];
edge[0] = left[3];
edge[1] = left[2];
edge[2] = left[1];
edge[3] = left[0];
/** L[-1] == P */
edge[4] = aboveLeft;
edge[5] = above[0];
edge[6] = above[1];
edge[7] = above[2];
edge[8] = above[3];
/**
* ESE (horizontal down) step = (1,2) or (-1,-2)
* predictor is from (5/2, -1)
*/
p[3 * 4 + 0] = avg2(edge[0], edge[1]);
/** (2, -1) */
p[3 * 4 + 1] = avg3(edge[0], edge[1], edge[2]);
/** ( 3/2, -1) */
p[2 * 4 + 0] = p[3 * 4 + 2] = avg2(edge[1], edge[2]);
/** ( 1, -1) */
p[2 * 4 + 1] = p[3 * 4 + 3] = avg3(edge[1], edge[2], edge[3]);
/** ( 1/2, -1) */
p[2 * 4 + 2] = p[1 * 4 + 0] = avg2(edge[2], edge[3]);
/** ( 0, -1) */
p[2 * 4 + 3] = p[1 * 4 + 1] = avg3(edge[2], edge[3], edge[4]);
/** (-1/2, -1) */
p[1 * 4 + 2] = p[0 * 4 + 0] = avg2(edge[3], edge[4]);
/** ( -1, -1) */
p[1 * 4 + 3] = p[0 * 4 + 1] = avg3(edge[3], edge[4], edge[5]);
/** (-1, 0) */
p[0 * 4 + 2] = avg3(edge[4], edge[5], edge[6]);
/** (-1, 1) */
p[0 * 4 + 3] = avg3(edge[5], edge[6], edge[7]);
return p;
}
public static int[] predictVL(int[] above, int[] aboveRight) {
int[] p = new int[16];
/**
* SSW (vertical left) step = (2,-1) or (-2,1)
* predictor is from (-1, 1/2)
*/
p[0 * 4 + 0] = avg2(above[0], above[1]);
/**
* (-1, 1)
*/
p[1 * 4 + 0] = avg3(above[0], above[1], above[2]);
/**
* (-1, 3/2)
*/
p[2 * 4 + 0] = p[0 * 4 + 1] = avg2(above[1], above[2]);
/**
* (-1, 2)
*/
p[1 * 4 + 1] = p[3 * 4 + 0] = avg3(above[1], above[2], above[3]);
/**
* (-1, 5/2)
*/
p[2 * 4 + 1] = p[0 * 4 + 2] = avg2(above[2], above[3]);
/**
* (-1, 3)
*/
p[3 * 4 + 1] = p[1 * 4 + 2] = avg3(above[2], above[3], aboveRight[0]);
/**
* (-1, 7/2)
*/
p[2 * 4 + 2] = p[0 * 4 + 3] = avg2(above[3], aboveRight[0]);
/**
* (-1, 4)
*/
p[3 * 4 + 2] = p[1 * 4 + 3] = avg3(above[3], aboveRight[0], aboveRight[1]);
/**
* Last two values do not strictly follow the pattern.
* (-1, 5) [avg2p(A + 4) = (-1,9/2)]
*/
p[2 * 4 + 3] = avg3(aboveRight[0], aboveRight[1], aboveRight[2]);
/**
* (-1, 6) [avg3p(A + 5) = (-1,5)]
*/
p[3 * 4 + 3] = avg3(aboveRight[1], aboveRight[2], aboveRight[3]);
return p;
}
public static int[] predictVR(int[] above, int[] left, int aboveLeft) {
int[] p = new int[16];
/**
* 9 already-constructed edge pixels
*/
int[] edge = new int[9];
edge[0] = left[3];
edge[1] = left[2];
edge[2] = left[1];
edge[3] = left[0];
/**
* L[-1] == P
*/
edge[4] = aboveLeft;
edge[5] = above[0];
edge[6] = above[1];
edge[7] = above[2];
edge[8] = above[3];
/**
* SSE (vertical right) step = (2,1) or (-2,-1)
* predictor is from (1, -1)
*/
p[3 * 4 + 0] = avg3(edge[1], edge[2], edge[3]);
/**
* (0, -1)
*/
p[2 * 4 + 0] = avg3(edge[2], edge[3], edge[4]);
/**
* (-1, -1)
*/
p[3 * 4 + 1] = p[1 * 4 + 0] = avg3(edge[3], edge[4], edge[5]);
/**
* (-1, -1/2)
*/
p[2 * 4 + 1] = p[0 * 4 + 0] = avg2(edge[4], edge[5]);
/**
* (-1, 0)
*/
p[3 * 4 + 2] = p[1 * 4 + 1] = avg3(edge[4], edge[5], edge[6]);
/**
* (-1, 1/2)
*/
p[2 * 4 + 2] = p[0 * 4 + 1] = avg2(edge[5], edge[6]);
/**
* (-1, 1)
*/
p[3 * 4 + 3] = p[1 * 4 + 2] = avg3(edge[5], edge[6], edge[7]);
/**
* (-1, 3/2)
*/
p[2 * 4 + 3] = p[0 * 4 + 2] = avg2(edge[6], edge[7]);
/**
* (-1, 2)
*/
p[1 * 4 + 3] = avg3(edge[6], edge[7], edge[8]);
/**
* (-1, 5/2)
*/
p[0 * 4 + 3] = avg2(edge[7], edge[8]);
return p;
}
/**
* <pre>
* E4|E5|E6|E7|E8|
* __|__|__|__|__|
* E3|
* __|
* E2|
* __|
* E1|
* __|
* E0|
* __|
* </pre>
*
* @param above
* @param left
* @param aboveLeft
* @return
*/
public static int[] predictRD(int[] above, int[] left, int aboveLeft) {
int[] p = new int[16];
/**
* 9 already-constructed edge pixels
*/
int[] edge = new int[9];
edge[0] = left[3];
edge[1] = left[2];
edge[2] = left[1];
edge[3] = left[0];
/**
* L[-1] == P
*/
edge[4] = aboveLeft;
edge[5] = above[0];
edge[6] = above[1];
edge[7] = above[2];
edge[8] = above[3];
/**
* southeast (right and down) step = (1,1) or (-1,-1)
* predictor is from (2, -1)
*/
p[3 * 4 + 0] = avg3(edge[0], edge[1], edge[2]);
/**
* (1, -1)
*/
p[3 * 4 + 1] = p[2 * 4 + 0] = avg3(edge[1], edge[2], edge[3]);
/**
* (0, -1)
*/
p[3 * 4 + 2] = p[2 * 4 + 1] = p[1 * 4 + 0] = avg3(edge[2], edge[3], edge[4]);
/**
* (-1, -1)
*/
p[3 * 4 + 3] = p[2 * 4 + 2] = p[1 * 4 + 1] = p[0 * 4 + 0] = avg3(edge[3], edge[4], edge[5]);
/**
* (-1, 0)
*/
p[2 * 4 + 3] = p[1 * 4 + 2] = p[0 * 4 + 1] = avg3(edge[4], edge[5], edge[6]);
/**
* (-1, 1)
*/
p[1 * 4 + 3] = p[0 * 4 + 2] = avg3(edge[5], edge[6], edge[7]);
/**
* (-1, 2)
*/
p[0 * 4 + 3] = avg3(edge[6], edge[7], edge[8]);
return p;
}
public static int[] predictLD(int[] above, int[] aboveRight) {
int[] p = new int[16];
/**
* southwest (left and down) step = (-1, 1) or (1,-1)
*/
/**
* avg3p(A + j) is the "smoothed" pixel at (-1,j)
*/
p[0 * 4 + 0] = avg3(above[0], above[1], above[2]);
p[0 * 4 + 1] = p[1 * 4 + 0] = avg3(above[1], above[2], above[3]);
p[0 * 4 + 2] = p[1 * 4 + 1] = p[2 * 4 + 0] = avg3(above[2], above[3], aboveRight[0]);
p[0 * 4 + 3] = p[1 * 4 + 2] = p[2 * 4 + 1] = p[3 * 4 + 0] = avg3(above[3], aboveRight[0], aboveRight[1]);
p[1 * 4 + 3] = p[2 * 4 + 2] = p[3 * 4 + 1] = avg3(aboveRight[0], aboveRight[1], aboveRight[2]);
p[2 * 4 + 3] = p[3 * 4 + 2] = avg3(aboveRight[1], aboveRight[2], aboveRight[3]);
p[3 * 4 + 3] = avg3(aboveRight[2], aboveRight[3], aboveRight[3]); /* A[8] does not exist */
return p;
}
public static int[] predictHE(int[] left, int aboveLeft) {
int[] p = new int[16];
/**
* Bottom row is exceptional because L[4] does not exist
*/
int v = avg3(left[2], left[3], left[3]);
/**
* all 4 columns = smoothed left column
*/
p[3 * 4 + 0] = p[3 * 4 + 1] = p[3 * 4 + 2] = p[3 * 4 + 3] = avg3(left[2], left[3], left[3]);
p[2 * 4 + 0] = p[2 * 4 + 1] = p[2 * 4 + 2] = p[2 * 4 + 3] = avg3(left[1], left[2], left[3]);
p[1 * 4 + 0] = p[1 * 4 + 1] = p[1 * 4 + 2] = p[1 * 4 + 3] = avg3(left[0], left[1], left[2]);
p[0 * 4 + 0] = p[0 * 4 + 1] = p[0 * 4 + 2] = p[0 * 4 + 3] = avg3(aboveLeft, left[0], left[1]);
return p;
}
/**
* avg3(Pixel x, Pixel y, Pixel z) { avg2(Pixel x, Pixel y) { return (x + y + 1) >> 1;}
*
* @param above
* @param aboveLeft
* @param aboveRight
* @return
*/
public static int[] predictVE(int[] above, int aboveLeft, int[] aboveRight) {
int[] p = new int[16];
p[0 * 4 + 0] = p[1 * 4 + 0] = p[2 * 4 + 0] = p[3 * 4 + 0] = avg3(aboveLeft, above[0], above[1]);
p[0 * 4 + 1] = p[1 * 4 + 1] = p[2 * 4 + 1] = p[3 * 4 + 1] = avg3(above[0], above[1], above[2]);
p[0 * 4 + 2] = p[1 * 4 + 2] = p[2 * 4 + 2] = p[3 * 4 + 2] = avg3(above[1], above[2], above[3]);
p[0 * 4 + 3] = p[1 * 4 + 3] = p[2 * 4 + 3] = p[3 * 4 + 3] = avg3(above[2], above[3], aboveRight[0]);
return p;
}
public static int avg2(int x, int y) {
return (x + y + 1) >> 1;
}
public static int avg3(int x, int y, int z) {
return (x + y + y + z + 2) >> 2;
}
public static int[] predictTM(int[] above, int[] left, int aboveLeft) {
int[] p = new int[16];
for (int aRow = 0; aRow < 4; aRow++)
for (int aCol = 0; aCol < 4; aCol++)
p[aRow * 4 + aCol] = QuantizationParams.clip255(left[aRow] + above[aCol] - aboveLeft);
return p;
}
public static int[] predictDC(int[] above, int[] left) {
int[] p = new int[16];
/**
* DC sum/avg, 4 is rounding adjustment
*/
int v = 4;
int i = 0;
do {
v += above[i] + left[i];
} while (++i < 4);
/**
* averaging 8 pixels
*/
v >>= 3;
for (int aRow = 0; aRow < 4; aRow++)
/**
* fill prediction buffer with constant DC value
*/
for (int aCol = 0; aCol < 4; aCol++)
p[aRow * 4 + aCol] = v;
return p;
}
public static int planeToType(PLANE plane, Boolean withY2) {
switch (plane) {
case Y2:
return 1;
case Y1:
if (withY2)
return 0;
else
return 3;
case U:
return 2;
case V:
return 2;
}
return -1;
}
}