| |
| /*! |
| *********************************************************************** |
| * \file |
| * block.c |
| * |
| * \brief |
| * Block functions |
| * |
| * \author |
| * Main contributors (see contributors.h for copyright, address and affiliation details) |
| * - Inge Lille-Langoy <inge.lille-langoy@telenor.com> |
| * - Rickard Sjoberg <rickard.sjoberg@era.ericsson.se> |
| *********************************************************************** |
| */ |
| |
| #include "contributors.h" |
| |
| #include <stdlib.h> |
| #include <string.h> |
| |
| #include "global.h" |
| #include "block.h" |
| #include "image.h" |
| #include "mb_access.h" |
| |
| |
| #define Q_BITS 15 |
| |
| static const int quant_coef[6][4][4] = { |
| {{13107, 8066,13107, 8066},{ 8066, 5243, 8066, 5243},{13107, 8066,13107, 8066},{ 8066, 5243, 8066, 5243}}, |
| {{11916, 7490,11916, 7490},{ 7490, 4660, 7490, 4660},{11916, 7490,11916, 7490},{ 7490, 4660, 7490, 4660}}, |
| {{10082, 6554,10082, 6554},{ 6554, 4194, 6554, 4194},{10082, 6554,10082, 6554},{ 6554, 4194, 6554, 4194}}, |
| {{ 9362, 5825, 9362, 5825},{ 5825, 3647, 5825, 3647},{ 9362, 5825, 9362, 5825},{ 5825, 3647, 5825, 3647}}, |
| {{ 8192, 5243, 8192, 5243},{ 5243, 3355, 5243, 3355},{ 8192, 5243, 8192, 5243},{ 5243, 3355, 5243, 3355}}, |
| {{ 7282, 4559, 7282, 4559},{ 4559, 2893, 4559, 2893},{ 7282, 4559, 7282, 4559},{ 4559, 2893, 4559, 2893}} |
| }; |
| static const int A[4][4] = { |
| { 16, 20, 16, 20}, |
| { 20, 25, 20, 25}, |
| { 16, 20, 16, 20}, |
| { 20, 25, 20, 25} |
| }; |
| |
| int quant_intra_default[16] = { |
| 6,13,20,28, |
| 13,20,28,32, |
| 20,28,32,37, |
| 28,32,37,42 |
| }; |
| |
| int quant_inter_default[16] = { |
| 10,14,20,24, |
| 14,20,24,27, |
| 20,24,27,30, |
| 24,27,30,34 |
| }; |
| |
| int quant8_intra_default[64] = { |
| 6,10,13,16,18,23,25,27, |
| 10,11,16,18,23,25,27,29, |
| 13,16,18,23,25,27,29,31, |
| 16,18,23,25,27,29,31,33, |
| 18,23,25,27,29,31,33,36, |
| 23,25,27,29,31,33,36,38, |
| 25,27,29,31,33,36,38,40, |
| 27,29,31,33,36,38,40,42 |
| }; |
| |
| int quant8_inter_default[64] = { |
| 9,13,15,17,19,21,22,24, |
| 13,13,17,19,21,22,24,25, |
| 15,17,19,21,22,24,25,27, |
| 17,19,21,22,24,25,27,28, |
| 19,21,22,24,25,27,28,30, |
| 21,22,24,25,27,28,30,32, |
| 22,24,25,27,28,30,32,33, |
| 24,25,27,28,30,32,33,35 |
| }; |
| |
| int quant_org[16] = { //to be use if no q matrix is chosen |
| 16,16,16,16, |
| 16,16,16,16, |
| 16,16,16,16, |
| 16,16,16,16 |
| }; |
| |
| int quant8_org[64] = { //to be use if no q matrix is chosen |
| 16,16,16,16,16,16,16,16, |
| 16,16,16,16,16,16,16,16, |
| 16,16,16,16,16,16,16,16, |
| 16,16,16,16,16,16,16,16, |
| 16,16,16,16,16,16,16,16, |
| 16,16,16,16,16,16,16,16, |
| 16,16,16,16,16,16,16,16, |
| 16,16,16,16,16,16,16,16 |
| }; |
| |
| // Notation for comments regarding prediction and predictors. |
| // The pels of the 4x4 block are labelled a..p. The predictor pels above |
| // are labelled A..H, from the left I..L, and from above left X, as follows: |
| // |
| // X A B C D E F G H |
| // I a b c d |
| // J e f g h |
| // K i j k l |
| // L m n o p |
| // |
| |
| // Predictor array index definitions |
| #define P_X (PredPel[0]) |
| #define P_A (PredPel[1]) |
| #define P_B (PredPel[2]) |
| #define P_C (PredPel[3]) |
| #define P_D (PredPel[4]) |
| #define P_E (PredPel[5]) |
| #define P_F (PredPel[6]) |
| #define P_G (PredPel[7]) |
| #define P_H (PredPel[8]) |
| #define P_I (PredPel[9]) |
| #define P_J (PredPel[10]) |
| #define P_K (PredPel[11]) |
| #define P_L (PredPel[12]) |
| |
| /*! |
| *********************************************************************** |
| * \brief |
| * makes and returns 4x4 blocks with all 5 intra prediction modes |
| * |
| * \return |
| * DECODING_OK decoding of intraprediction mode was sucessfull \n |
| * SEARCH_SYNC search next sync element as errors while decoding occured |
| *********************************************************************** |
| */ |
| |
| int intrapred( struct img_par *img, //!< image parameters |
| int ioff, //!< pixel offset X within MB |
| int joff, //!< pixel offset Y within MB |
| int img_block_x, //!< location of block X, multiples of 4 |
| int img_block_y) //!< location of block Y, multiples of 4 |
| { |
| int i,j; |
| int s0; |
| int img_y,img_x; |
| imgpel PredPel[13]; // array of predictor pels |
| |
| imgpel **imgY = dec_picture->imgY; |
| |
| PixelPos pix_a[4]; |
| PixelPos pix_b, pix_c, pix_d; |
| |
| int block_available_up; |
| int block_available_left; |
| int block_available_up_left; |
| int block_available_up_right; |
| |
| int mb_nr=img->current_mb_nr; |
| |
| byte predmode = img->ipredmode[img_block_y][img_block_x]; |
| int jpos0 = joff, jpos1 = joff + 1, jpos2 = joff + 2, jpos3 = joff + 3; |
| int ipos0 = ioff, ipos1 = ioff + 1, ipos2 = ioff + 2, ipos3 = ioff + 3; |
| |
| |
| img_x=img_block_x*4; |
| img_y=img_block_y*4; |
| |
| for (i=0;i<4;i++) |
| { |
| getNeighbour(mb_nr, ioff -1 , joff +i , IS_LUMA, &pix_a[i]); |
| } |
| |
| getNeighbour(mb_nr, ioff , joff -1 , IS_LUMA, &pix_b); |
| getNeighbour(mb_nr, ioff +4 , joff -1 , IS_LUMA, &pix_c); |
| getNeighbour(mb_nr, ioff -1 , joff -1 , IS_LUMA, &pix_d); |
| |
| pix_c.available = pix_c.available && !((ioff==4) && ((joff==4)||(joff==12))); |
| |
| if (active_pps->constrained_intra_pred_flag) |
| { |
| for (i=0, block_available_left=1; i<4;i++) |
| block_available_left &= pix_a[i].available ? img->intra_block[pix_a[i].mb_addr]: 0; |
| block_available_up = pix_b.available ? img->intra_block [pix_b.mb_addr] : 0; |
| block_available_up_right = pix_c.available ? img->intra_block [pix_c.mb_addr] : 0; |
| block_available_up_left = pix_d.available ? img->intra_block [pix_d.mb_addr] : 0; |
| } |
| else |
| { |
| block_available_left = pix_a[0].available; |
| block_available_up = pix_b.available; |
| block_available_up_right = pix_c.available; |
| block_available_up_left = pix_d.available; |
| } |
| |
| // form predictor pels |
| if (block_available_up) |
| { |
| P_A = imgY[pix_b.pos_y][pix_b.pos_x+0]; |
| P_B = imgY[pix_b.pos_y][pix_b.pos_x+1]; |
| P_C = imgY[pix_b.pos_y][pix_b.pos_x+2]; |
| P_D = imgY[pix_b.pos_y][pix_b.pos_x+3]; |
| |
| } |
| else |
| { |
| P_A = P_B = P_C = P_D = img->dc_pred_value_luma; |
| } |
| |
| if (block_available_up_right) |
| { |
| P_E = imgY[pix_c.pos_y][pix_c.pos_x+0]; |
| P_F = imgY[pix_c.pos_y][pix_c.pos_x+1]; |
| P_G = imgY[pix_c.pos_y][pix_c.pos_x+2]; |
| P_H = imgY[pix_c.pos_y][pix_c.pos_x+3]; |
| } |
| else |
| { |
| P_E = P_F = P_G = P_H = P_D; |
| } |
| |
| if (block_available_left) |
| { |
| P_I = imgY[pix_a[0].pos_y][pix_a[0].pos_x]; |
| P_J = imgY[pix_a[1].pos_y][pix_a[1].pos_x]; |
| P_K = imgY[pix_a[2].pos_y][pix_a[2].pos_x]; |
| P_L = imgY[pix_a[3].pos_y][pix_a[3].pos_x]; |
| } |
| else |
| { |
| P_I = P_J = P_K = P_L = img->dc_pred_value_luma; |
| } |
| |
| if (block_available_up_left) |
| { |
| P_X = imgY[pix_d.pos_y][pix_d.pos_x]; |
| } |
| else |
| { |
| P_X = img->dc_pred_value_luma; |
| } |
| |
| |
| switch (predmode) |
| { |
| case DC_PRED: /* DC prediction */ |
| |
| s0 = 0; |
| if (block_available_up && block_available_left) |
| { |
| // no edge |
| s0 = (P_A + P_B + P_C + P_D + P_I + P_J + P_K + P_L + 4)/(2*BLOCK_SIZE); |
| } |
| else if (!block_available_up && block_available_left) |
| { |
| // upper edge |
| s0 = (P_I + P_J + P_K + P_L + 2)/BLOCK_SIZE; |
| } |
| else if (block_available_up && !block_available_left) |
| { |
| // left edge |
| s0 = (P_A + P_B + P_C + P_D + 2)/BLOCK_SIZE; |
| } |
| else //if (!block_available_up && !block_available_left) |
| { |
| // top left corner, nothing to predict from |
| s0 = img->dc_pred_value_luma; |
| } |
| |
| for (j=0; j < BLOCK_SIZE; j++) |
| { |
| for (i=0; i < BLOCK_SIZE; i++) |
| { |
| // store DC prediction |
| img->mpr[j+joff][i+ioff] = (imgpel) s0; |
| } |
| } |
| break; |
| |
| case VERT_PRED: /* vertical prediction from block above */ |
| if (!block_available_up) |
| printf ("warning: Intra_4x4_Vertical prediction mode not allowed at mb %d\n", (int) img->current_mb_nr); |
| |
| for(j=0;j<BLOCK_SIZE;j++) |
| for(i=0;i<BLOCK_SIZE;i++) |
| img->mpr[j+joff][i+ioff]=imgY[pix_b.pos_y][pix_b.pos_x+i];/* store predicted 4x4 block */ |
| break; |
| |
| case HOR_PRED: /* horizontal prediction from left block */ |
| if (!block_available_left) |
| printf ("warning: Intra_4x4_Horizontal prediction mode not allowed at mb %d\n",(int) img->current_mb_nr); |
| |
| for(j=0;j<BLOCK_SIZE;j++) |
| for(i=0;i<BLOCK_SIZE;i++) |
| img->mpr[j+joff][i+ioff]=imgY[pix_a[j].pos_y][pix_a[j].pos_x]; /* store predicted 4x4 block */ |
| break; |
| |
| case DIAG_DOWN_RIGHT_PRED: |
| if ((!block_available_up)||(!block_available_left)||(!block_available_up_left)) |
| printf ("warning: Intra_4x4_Diagonal_Down_Right prediction mode not allowed at mb %d\n",(int) img->current_mb_nr); |
| |
| img->mpr[jpos3][ipos0] = (imgpel) ((P_L + 2*P_K + P_J + 2) >> 2); |
| img->mpr[jpos2][ipos0] = |
| img->mpr[jpos3][ipos1] = (imgpel) ((P_K + 2*P_J + P_I + 2) >> 2); |
| img->mpr[jpos1][ipos0] = |
| img->mpr[jpos2][ipos1] = |
| img->mpr[jpos3][ipos2] = (imgpel) ((P_J + 2*P_I + P_X + 2) >> 2); |
| img->mpr[jpos0][ipos0] = |
| img->mpr[jpos1][ipos1] = |
| img->mpr[jpos2][ipos2] = |
| img->mpr[jpos3][ipos3] = (imgpel) ((P_I + 2*P_X + P_A + 2) >> 2); |
| img->mpr[jpos0][ipos1] = |
| img->mpr[jpos1][ipos2] = |
| img->mpr[jpos2][ipos3] = (imgpel) ((P_X + 2*P_A + P_B + 2) >> 2); |
| img->mpr[jpos0][ipos2] = |
| img->mpr[jpos1][ipos3] = (imgpel) ((P_A + 2*P_B + P_C + 2) >> 2); |
| img->mpr[jpos0][ipos3] = (imgpel) ((P_B + 2*P_C + P_D + 2) >> 2); |
| break; |
| |
| case DIAG_DOWN_LEFT_PRED: |
| if (!block_available_up) |
| printf ("warning: Intra_4x4_Diagonal_Down_Left prediction mode not allowed at mb %d\n",img->current_mb_nr); |
| |
| img->mpr[jpos0][ipos0] = (imgpel) ((P_A + P_C + 2*(P_B) + 2) >> 2); |
| img->mpr[jpos0][ipos1] = |
| img->mpr[jpos1][ipos0] = (imgpel) ((P_B + P_D + 2*(P_C) + 2) >> 2); |
| img->mpr[jpos0][ipos2] = |
| img->mpr[jpos1][ipos1] = |
| img->mpr[jpos2][ipos0] = (imgpel) ((P_C + P_E + 2*(P_D) + 2) >> 2); |
| img->mpr[jpos0][ipos3] = |
| img->mpr[jpos1][ipos2] = |
| img->mpr[jpos2][ipos1] = |
| img->mpr[jpos3][ipos0] = (imgpel) ((P_D + P_F + 2*(P_E) + 2) >> 2); |
| img->mpr[jpos1][ipos3] = |
| img->mpr[jpos2][ipos2] = |
| img->mpr[jpos3][ipos1] = (imgpel) ((P_E + P_G + 2*(P_F) + 2) >> 2); |
| img->mpr[jpos2][ipos3] = |
| img->mpr[jpos3][ipos2] = (imgpel) ((P_F + P_H + 2*(P_G) + 2) >> 2); |
| img->mpr[jpos3][ipos3] = (imgpel) ((P_G + 3*(P_H) + 2) >> 2); |
| break; |
| |
| case VERT_RIGHT_PRED:/* diagonal prediction -22.5 deg to horizontal plane */ |
| if ((!block_available_up)||(!block_available_left)||(!block_available_up_left)) |
| printf ("warning: Intra_4x4_Vertical_Right prediction mode not allowed at mb %d\n",img->current_mb_nr); |
| |
| img->mpr[jpos0][ipos0] = |
| img->mpr[jpos2][ipos1] = (imgpel) ((P_X + P_A + 1) >> 1); |
| img->mpr[jpos0][ipos1] = |
| img->mpr[jpos2][ipos2] = (imgpel) ((P_A + P_B + 1) >> 1); |
| img->mpr[jpos0][ipos2] = |
| img->mpr[jpos2][ipos3] = (imgpel) ((P_B + P_C + 1) >> 1); |
| img->mpr[jpos0][ipos3] = (imgpel) ((P_C + P_D + 1) >> 1); |
| img->mpr[jpos1][ipos0] = |
| img->mpr[jpos3][ipos1] = (imgpel) ((P_I + 2*P_X + P_A + 2) >> 2); |
| img->mpr[jpos1][ipos1] = |
| img->mpr[jpos3][ipos2] = (imgpel) ((P_X + 2*P_A + P_B + 2) >> 2); |
| img->mpr[jpos1][ipos2] = |
| img->mpr[jpos3][ipos3] = (imgpel) ((P_A + 2*P_B + P_C + 2) >> 2); |
| img->mpr[jpos1][ipos3] = (imgpel) ((P_B + 2*P_C + P_D + 2) >> 2); |
| img->mpr[jpos2][ipos0] = (imgpel) ((P_X + 2*P_I + P_J + 2) >> 2); |
| img->mpr[jpos3][ipos0] = (imgpel) ((P_I + 2*P_J + P_K + 2) >> 2); |
| break; |
| |
| case VERT_LEFT_PRED:/* diagonal prediction -22.5 deg to horizontal plane */ |
| if (!block_available_up) |
| printf ("warning: Intra_4x4_Vertical_Left prediction mode not allowed at mb %d\n",img->current_mb_nr); |
| |
| img->mpr[jpos0][ipos0] = (imgpel) ((P_A + P_B + 1) >> 1); |
| img->mpr[jpos0][ipos1] = |
| img->mpr[jpos2][ipos0] = (imgpel) ((P_B + P_C + 1) >> 1); |
| img->mpr[jpos0][ipos2] = |
| img->mpr[jpos2][ipos1] = (imgpel) ((P_C + P_D + 1) >> 1); |
| img->mpr[jpos0][ipos3] = |
| img->mpr[jpos2][ipos2] = (imgpel) ((P_D + P_E + 1) >> 1); |
| img->mpr[jpos2][ipos3] = (imgpel) ((P_E + P_F + 1) >> 1); |
| img->mpr[jpos1][ipos0] = (imgpel) ((P_A + 2*P_B + P_C + 2) >> 2); |
| img->mpr[jpos1][ipos1] = |
| img->mpr[jpos3][ipos0] = (imgpel) ((P_B + 2*P_C + P_D + 2) >> 2); |
| img->mpr[jpos1][ipos2] = |
| img->mpr[jpos3][ipos1] = (imgpel) ((P_C + 2*P_D + P_E + 2) >> 2); |
| img->mpr[jpos1][ipos3] = |
| img->mpr[jpos3][ipos2] = (imgpel) ((P_D + 2*P_E + P_F + 2) >> 2); |
| img->mpr[jpos3][ipos3] = (imgpel) ((P_E + 2*P_F + P_G + 2) >> 2); |
| break; |
| |
| case HOR_UP_PRED:/* diagonal prediction -22.5 deg to horizontal plane */ |
| if (!block_available_left) |
| printf ("warning: Intra_4x4_Horizontal_Up prediction mode not allowed at mb %d\n",img->current_mb_nr); |
| |
| img->mpr[jpos0][ipos0] = (imgpel) ((P_I + P_J + 1) >> 1); |
| img->mpr[jpos0][ipos1] = (imgpel) ((P_I + 2*P_J + P_K + 2) >> 2); |
| img->mpr[jpos0][ipos2] = |
| img->mpr[jpos1][ipos0] = (imgpel) ((P_J + P_K + 1) >> 1); |
| img->mpr[jpos0][ipos3] = |
| img->mpr[jpos1][ipos1] = (imgpel) ((P_J + 2*P_K + P_L + 2) >> 2); |
| img->mpr[jpos1][ipos2] = |
| img->mpr[jpos2][ipos0] = (imgpel) ((P_K + P_L + 1) >> 1); |
| img->mpr[jpos1][ipos3] = |
| img->mpr[jpos2][ipos1] = (imgpel) ((P_K + 2*P_L + P_L + 2) >> 2); |
| img->mpr[jpos2][ipos3] = |
| img->mpr[jpos3][ipos1] = |
| img->mpr[jpos3][ipos0] = |
| img->mpr[jpos2][ipos2] = |
| img->mpr[jpos3][ipos2] = |
| img->mpr[jpos3][ipos3] = (imgpel) P_L; |
| break; |
| |
| case HOR_DOWN_PRED:/* diagonal prediction -22.5 deg to horizontal plane */ |
| if ((!block_available_up)||(!block_available_left)||(!block_available_up_left)) |
| printf ("warning: Intra_4x4_Horizontal_Down prediction mode not allowed at mb %d\n",img->current_mb_nr); |
| |
| img->mpr[jpos0][ipos0] = |
| img->mpr[jpos1][ipos2] = (imgpel) ((P_X + P_I + 1) >> 1); |
| img->mpr[jpos0][ipos1] = |
| img->mpr[jpos1][ipos3] = (imgpel) ((P_I + 2*P_X + P_A + 2) >> 2); |
| img->mpr[jpos0][ipos2] = (imgpel) ((P_X + 2*P_A + P_B + 2) >> 2); |
| img->mpr[jpos0][ipos3] = (imgpel) ((P_A + 2*P_B + P_C + 2) >> 2); |
| img->mpr[jpos1][ipos0] = |
| img->mpr[jpos2][ipos2] = (imgpel) ((P_I + P_J + 1) >> 1); |
| img->mpr[jpos1][ipos1] = |
| img->mpr[jpos2][ipos3] = (imgpel) ((P_X + 2*P_I + P_J + 2) >> 2); |
| img->mpr[jpos2][ipos0] = |
| img->mpr[jpos3][ipos2] = (imgpel) ((P_J + P_K + 1) >> 1); |
| img->mpr[jpos2][ipos1] = |
| img->mpr[jpos3][ipos3] = (imgpel) ((P_I + 2*P_J + P_K + 2) >> 2); |
| img->mpr[jpos3][ipos0] = (imgpel) ((P_K + P_L + 1) >> 1); |
| img->mpr[jpos3][ipos1] = (imgpel) ((P_J + 2*P_K + P_L + 2) >> 2); |
| break; |
| |
| default: |
| printf("Error: illegal intra_4x4 prediction mode: %d\n",predmode); |
| return SEARCH_SYNC; |
| break; |
| } |
| |
| return DECODING_OK; |
| } |
| |
| |
| /*! |
| *********************************************************************** |
| * \return |
| * best SAD |
| *********************************************************************** |
| */ |
| int intrapred_luma_16x16(struct img_par *img, //!< image parameters |
| int predmode) //!< prediction mode |
| { |
| int s0=0,s1,s2; |
| |
| int i,j; |
| |
| int ih,iv; |
| int ib,ic,iaa; |
| |
| imgpel **imgY=dec_picture->imgY; |
| |
| int mb_nr=img->current_mb_nr; |
| |
| PixelPos up; //!< pixel position p(0,-1) |
| PixelPos left[17]; //!< pixel positions p(-1, -1..15) |
| |
| int up_avail, left_avail, left_up_avail; |
| |
| s1=s2=0; |
| |
| for (i=0;i<17;i++) |
| { |
| getNeighbour(mb_nr, -1 , i-1 , IS_LUMA, &left[i]); |
| } |
| getNeighbour(mb_nr, 0 , -1 , IS_LUMA, &up); |
| |
| if (!active_pps->constrained_intra_pred_flag) |
| { |
| up_avail = up.available; |
| left_avail = left[1].available; |
| left_up_avail = left[0].available; |
| } |
| else |
| { |
| up_avail = up.available ? img->intra_block[up.mb_addr] : 0; |
| for (i=1, left_avail=1; i<17;i++) |
| left_avail &= left[i].available ? img->intra_block[left[i].mb_addr]: 0; |
| left_up_avail = left[0].available ? img->intra_block[left[0].mb_addr]: 0; |
| } |
| |
| switch (predmode) |
| { |
| case VERT_PRED_16: // vertical prediction from block above |
| if (!up_avail) |
| error ("invalid 16x16 intra pred Mode VERT_PRED_16",500); |
| for(j=0;j<MB_BLOCK_SIZE;j++) |
| for(i=0;i<MB_BLOCK_SIZE;i++) |
| img->mpr[j][i]=imgY[up.pos_y][up.pos_x+i];// store predicted 16x16 block |
| break; |
| |
| case HOR_PRED_16: // horizontal prediction from left block |
| if (!left_avail) |
| error ("invalid 16x16 intra pred Mode HOR_PRED_16",500); |
| for(j=0;j<MB_BLOCK_SIZE;j++) |
| for(i=0;i<MB_BLOCK_SIZE;i++) |
| img->mpr[j][i]=imgY[left[j+1].pos_y][left[j+1].pos_x]; // store predicted 16x16 block |
| break; |
| |
| case DC_PRED_16: // DC prediction |
| s1=s2=0; |
| for (i=0; i < MB_BLOCK_SIZE; i++) |
| { |
| if (up_avail) |
| s1 += imgY[up.pos_y][up.pos_x+i]; // sum hor pix |
| if (left_avail) |
| s2 += imgY[left[i+1].pos_y][left[i+1].pos_x]; // sum vert pix |
| } |
| if (up_avail && left_avail) |
| s0=(s1+s2+16)>>5; // no edge |
| if (!up_avail && left_avail) |
| s0=(s2+8)>>4; // upper edge |
| if (up_avail && !left_avail) |
| s0=(s1+8)>>4; // left edge |
| if (!up_avail && !left_avail) |
| s0=img->dc_pred_value_luma; // top left corner, nothing to predict from |
| for(i=0;i<MB_BLOCK_SIZE;i++) |
| for(j=0;j<MB_BLOCK_SIZE;j++) |
| { |
| img->mpr[j][i]=(imgpel) s0; |
| } |
| break; |
| case PLANE_16:// 16 bit integer plan pred |
| if (!up_avail || !left_up_avail || !left_avail) |
| error ("invalid 16x16 intra pred Mode PLANE_16",500); |
| |
| ih=0; |
| iv=0; |
| for (i=1;i<9;i++) |
| { |
| if (i<8) |
| ih += i*(imgY[up.pos_y][up.pos_x+7+i] - imgY[up.pos_y][up.pos_x+7-i]); |
| else |
| ih += i*(imgY[up.pos_y][up.pos_x+7+i] - imgY[left[0].pos_y][left[0].pos_x]); |
| |
| iv += i*(imgY[left[8+i].pos_y][left[8+i].pos_x] - imgY[left[8-i].pos_y][left[8-i].pos_x]); |
| } |
| ib=(5*ih+32)>>6; |
| ic=(5*iv+32)>>6; |
| |
| iaa=16*(imgY[up.pos_y][up.pos_x+15]+imgY[left[16].pos_y][left[16].pos_x]); |
| for (j=0;j< MB_BLOCK_SIZE;j++) |
| { |
| for (i=0;i< MB_BLOCK_SIZE;i++) |
| { |
| img->mpr[j][i]=(imgpel) iClip1(img->max_imgpel_value,((iaa+(i-7)*ib +(j-7)*ic + 16)>>5)); |
| } |
| }// store plane prediction |
| break; |
| |
| default: |
| { // indication of fault in bitstream,exit |
| printf("illegal 16x16 intra prediction mode input: %d\n",predmode); |
| return SEARCH_SYNC; |
| } |
| } |
| |
| return DECODING_OK; |
| } |
| |
| |
| void intrapred_chroma(struct img_par *img, int uv) |
| { |
| int i,j, ii, jj, ioff, joff; |
| |
| imgpel ***imgUV = dec_picture->imgUV; |
| |
| int js[4][4]; |
| |
| int pred; |
| int ih, iv, ib, ic, iaa; |
| |
| int b8, b4; |
| int yuv = dec_picture->chroma_format_idc - 1; |
| int blk_x, blk_y; |
| int block_pos[3][4][4]= //[yuv][b8][b4] |
| { |
| { {0, 1, 2, 3},{0, 0, 0, 0},{0, 0, 0, 0},{0, 0, 0, 0}}, |
| { {0, 1, 2, 3},{2, 3, 2, 3},{0, 0, 0, 0},{0, 0, 0, 0}}, |
| { {0, 1, 2, 3},{1, 1, 3, 3},{2, 3, 2, 3},{3, 3, 3, 3}} |
| }; |
| int s0, s1, s2, s3; |
| |
| int mb_nr=img->current_mb_nr; |
| Macroblock *currMB = &img->mb_data[img->current_mb_nr]; |
| |
| PixelPos up; //!< pixel position p(0,-1) |
| PixelPos left[17]; //!< pixel positions p(-1, -1..16) |
| |
| int up_avail, left_avail[2], left_up_avail; |
| |
| int cr_MB_x = img->mb_cr_size_x; |
| int cr_MB_y = img->mb_cr_size_y; |
| |
| for (i=0;i<cr_MB_y+1;i++) |
| { |
| getNeighbour(mb_nr, -1, i-1, IS_CHROMA, &left[i]); |
| } |
| |
| getNeighbour(mb_nr, 0, -1, IS_CHROMA, &up); |
| |
| if (!active_pps->constrained_intra_pred_flag) |
| { |
| up_avail = up.available; |
| left_avail[0] = left_avail[1] = left[1].available; |
| left_up_avail = left[0].available; |
| } |
| else |
| { |
| up_avail = up.available ? img->intra_block[up.mb_addr] : 0; |
| for (i=0, left_avail[0]=1; i<cr_MB_y/2;i++) |
| left_avail[0] &= left[i+1].available ? img->intra_block[left[i+1].mb_addr]: 0; |
| for (i=cr_MB_y/2, left_avail[1]=1; i<cr_MB_y;i++) |
| left_avail[1] &= left[i+1].available ? img->intra_block[left[i+1].mb_addr]: 0; |
| left_up_avail = left[0].available ? img->intra_block[left[0].mb_addr]: 0; |
| } |
| |
| |
| if (currMB->c_ipred_mode == DC_PRED_8) |
| { |
| // DC prediction |
| for(b8=0; b8<img->num_blk8x8_uv/2;b8++) |
| { |
| for (b4=0; b4<4; b4++) |
| { |
| blk_y = subblk_offset_y[yuv][b8][b4] + 1; |
| blk_x = subblk_offset_x[yuv][b8][b4]; |
| |
| s0=s1=s2=s3=0; |
| js[b8][b4]=img->dc_pred_value_chroma; |
| |
| //===== get prediction value ===== |
| switch (block_pos[yuv][b8][b4]) |
| { |
| case 0: //===== TOP LEFT ===== |
| if (up_avail) for (i=blk_x;i<(blk_x+4);i++) s0 += imgUV[uv][up.pos_y][up.pos_x + i]; |
| if (left_avail[0]) for (i=blk_y;i<(blk_y+4);i++) s2 += imgUV[uv][left[i].pos_y][left[i].pos_x]; |
| if (up_avail && left_avail[0]) js[b8][b4] = (s0+s2+4) >> 3; |
| else if (up_avail) js[b8][b4] = (s0 +2) >> 2; |
| else if (left_avail[0]) js[b8][b4] = (s2 +2) >> 2; |
| break; |
| case 1: //===== TOP RIGHT ===== |
| if (up_avail) for (i=blk_x;i<(blk_x+4);i++) s1 += imgUV[uv][up.pos_y][up.pos_x + i]; |
| else if (left_avail[0]) for (i=blk_y;i<(blk_y+4);i++) s2 += imgUV[uv][left[i].pos_y][left[i].pos_x]; |
| if (up_avail) js[b8][b4] = (s1 +2) >> 2; |
| else if (left_avail[0]) js[b8][b4] = (s2 +2) >> 2; |
| break; |
| case 2: //===== BOTTOM LEFT ===== |
| if (left_avail[1]) for (i=blk_y;i<(blk_y+4);i++) s3 += imgUV[uv][left[i].pos_y][left[i].pos_x]; |
| else if (up_avail) for (i=blk_x;i<(blk_x+4);i++) s0 += imgUV[uv][up.pos_y][up.pos_x + i]; |
| if (left_avail[1]) js[b8][b4] = (s3 +2) >> 2; |
| else if (up_avail) js[b8][b4] = (s0 +2) >> 2; |
| break; |
| case 3: //===== BOTTOM RIGHT ===== |
| if (up_avail) for (i=blk_x;i<(blk_x+4);i++) s1 += imgUV[uv][up.pos_y][up.pos_x + i]; |
| if (left_avail[1]) for (i=blk_y;i<(blk_y+4);i++) s3 += imgUV[uv][left[i].pos_y][left[i].pos_x]; |
| if (up_avail && left_avail[1]) js[b8][b4] = (s1+s3+4) >> 3; |
| else if (up_avail) js[b8][b4] = (s1 +2) >> 2; |
| else if (left_avail[1]) js[b8][b4] = (s3 +2) >> 2; |
| break; |
| } |
| } |
| } |
| } |
| if (PLANE_8 == currMB->c_ipred_mode) |
| { |
| // plane prediction |
| if (!left_up_avail || !left_avail[0] || !left_avail[1] || !up_avail) |
| error("unexpected PLANE_8 chroma intra prediction mode",-1); |
| |
| ih = cr_MB_x/2*(imgUV[uv][up.pos_y][up.pos_x+cr_MB_x-1] - imgUV[uv][left[0].pos_y][left[0].pos_x]); |
| for (i=0;i<cr_MB_x/2-1;i++) |
| ih += (i+1)*(imgUV[uv][up.pos_y][up.pos_x+cr_MB_x/2 +i] - |
| imgUV[uv][up.pos_y][up.pos_x+cr_MB_x/2-2-i]); |
| |
| iv = cr_MB_y/2*(imgUV[uv][left[cr_MB_y].pos_y][left[cr_MB_y].pos_x] - imgUV[uv][left[0].pos_y][left[0].pos_x]); |
| for (i=0;i<cr_MB_y/2-1;i++) |
| iv += (i+1)*(imgUV[uv][left[cr_MB_y/2+1+i].pos_y][left[cr_MB_y/2+1+i].pos_x] - |
| imgUV[uv][left[cr_MB_y/2-1-i].pos_y][left[cr_MB_y/2-1-i].pos_x]); |
| |
| ib= ((cr_MB_x == 8?17:5)*ih+2*cr_MB_x)>>(cr_MB_x == 8?5:6); |
| ic= ((cr_MB_y == 8?17:5)*iv+2*cr_MB_y)>>(cr_MB_y == 8?5:6); |
| |
| iaa=16*(imgUV[uv][left[cr_MB_y].pos_y][left[cr_MB_y].pos_x] + |
| imgUV[uv][up.pos_y][up.pos_x+cr_MB_x-1]); |
| |
| for (j=0; j<cr_MB_y; j++) |
| for (i=0; i<cr_MB_x; i++) |
| img->mpr[j][i]=(imgpel) iClip1(img->max_imgpel_value_uv,((iaa+(i-cr_MB_x/2+1)*ib+(j-cr_MB_y/2+1)*ic+16)>>5)); |
| } |
| else |
| { |
| switch (currMB->c_ipred_mode) |
| { |
| case DC_PRED_8: |
| for (b8=0;b8<img->num_blk8x8_uv/2;b8++) |
| { |
| for (b4=0;b4<4;b4++) |
| { |
| joff = subblk_offset_y[yuv][b8][b4]; |
| ioff = subblk_offset_x[yuv][b8][b4]; |
| for (jj=joff; jj<joff + BLOCK_SIZE; jj++) |
| for (ii=ioff; ii<ioff + BLOCK_SIZE; ii++) |
| { |
| img->mpr[jj][ii]=(imgpel) js[b8][b4]; |
| } |
| } |
| } |
| break; |
| case HOR_PRED_8: |
| if (!left_avail[0] || !left_avail[1]) |
| error("unexpected HOR_PRED_8 chroma intra prediction mode",-1); |
| |
| for (j=0;j<2;j++) |
| { |
| joff=j*cr_MB_y/2; |
| for(i=0;i<2;i++) |
| { |
| ioff=i*cr_MB_x/2; |
| for (jj=joff; jj<joff + cr_MB_y/2; jj++) |
| { |
| pred = imgUV[uv][left[1+jj].pos_y][left[1+jj].pos_x]; |
| for (ii=ioff; ii<ioff + cr_MB_x/2; ii++) |
| img->mpr[jj][ii]=(imgpel) pred; |
| } |
| } |
| } |
| break; |
| case VERT_PRED_8: |
| if (!up_avail) |
| error("unexpected VERT_PRED_8 chroma intra prediction mode",-1); |
| |
| for (j=0;j<2;j++) |
| { |
| joff=j*cr_MB_y/2; |
| for(i=0;i<2;i++) |
| { |
| ioff=i*cr_MB_x/2; |
| for (ii=ioff; ii<ioff + cr_MB_x/2; ii++) |
| { |
| pred = imgUV[uv][up.pos_y][up.pos_x+ii]; |
| for (jj=joff; jj<joff + cr_MB_y/2; jj++) |
| img->mpr[jj][ii]=(imgpel) pred; |
| } |
| } |
| } |
| break; |
| default: |
| error("illegal chroma intra prediction mode", 600); |
| break; |
| } |
| } |
| } |
| |
| /*! |
| *********************************************************************** |
| * \brief |
| * Inverse 4x4 transformation, transforms cof to m7 |
| *********************************************************************** |
| */ |
| void itrans(struct img_par *img, //!< image parameters |
| int ioff, //!< index to 4x4 block |
| int joff, //!< |
| int i0, //!< |
| int j0, |
| int chroma) |
| { |
| int i,j; |
| int m5[4]; |
| int m6[4]; |
| |
| Boolean lossless_qpprime = (Boolean) ((img->qp + img->bitdepth_luma_qp_scale)==0 && img->lossless_qpprime_flag==1); |
| int max_imgpel_value = chroma ? img->max_imgpel_value_uv : img->max_imgpel_value; |
| |
| if (!lossless_qpprime) |
| { |
| // horizontal |
| for (j=0;j<BLOCK_SIZE;j++) |
| { |
| memcpy(&m5[0],&img->cof[i0][j0][j][0], BLOCK_SIZE * sizeof(int)); |
| |
| m6[0] = m5[0] + m5[2]; |
| m6[1] = m5[0] - m5[2]; |
| m6[2] = (m5[1] >> 1) - m5[3]; |
| m6[3] = m5[1] + (m5[3] >> 1); |
| |
| img->m7[j][0] = m6[0] + m6[3]; |
| img->m7[j][3] = m6[0] - m6[3]; |
| img->m7[j][1] = m6[1] + m6[2]; |
| img->m7[j][2] = m6[1] - m6[2]; |
| } |
| // vertical |
| for (i=0;i<BLOCK_SIZE;i++) |
| { |
| int ipos = i+ioff; |
| |
| m5[0]=img->m7[0][i]; |
| m5[1]=img->m7[1][i]; |
| m5[2]=img->m7[2][i]; |
| m5[3]=img->m7[3][i]; |
| |
| m6[0] = m5[0] + m5[2]; |
| m6[1] = m5[0] - m5[2]; |
| m6[2] = (m5[1]>>1) - m5[3]; |
| m6[3] = m5[1] + (m5[3]>>1); |
| |
| img->m7[0][i] = iClip1(max_imgpel_value, rshift_rnd_sf((m6[0] + m6[3] + ((long)img->mpr[ joff][ipos] << DQ_BITS)), DQ_BITS)); |
| img->m7[1][i] = iClip1(max_imgpel_value, rshift_rnd_sf((m6[1] + m6[2] + ((long)img->mpr[1 + joff][ipos] << DQ_BITS)), DQ_BITS)); |
| img->m7[2][i] = iClip1(max_imgpel_value, rshift_rnd_sf((m6[1] - m6[2] + ((long)img->mpr[2 + joff][ipos] << DQ_BITS)), DQ_BITS)); |
| img->m7[3][i] = iClip1(max_imgpel_value, rshift_rnd_sf((m6[0] - m6[3] + ((long)img->mpr[3 + joff][ipos] << DQ_BITS)), DQ_BITS)); |
| } |
| } |
| else |
| { |
| for (j=0;j<BLOCK_SIZE;j++) |
| for (i=0;i<BLOCK_SIZE ;i++) |
| img->m7[j][i] = iClip1(max_imgpel_value, (img->cof[i0][j0][j][i]+(long)img->mpr[j+joff][i+ioff])); |
| } |
| } |
| |
| /*! |
| ************************************************************************ |
| * \brief |
| * For mapping the q-matrix to the active id and calculate quantisation values |
| * |
| * \param pps |
| * Picture parameter set |
| * \param sps |
| * Sequence parameter set |
| * |
| ************************************************************************ |
| */ |
| void AssignQuantParam(pic_parameter_set_rbsp_t* pps, seq_parameter_set_rbsp_t* sps) |
| { |
| int i; |
| |
| if(!pps->pic_scaling_matrix_present_flag && !sps->seq_scaling_matrix_present_flag) |
| { |
| for(i=0; i<8; i++) |
| qmatrix[i] = (i<6) ? quant_org:quant8_org; |
| } |
| else |
| { |
| if(sps->seq_scaling_matrix_present_flag) // check sps first |
| { |
| for(i=0; i<8; i++) |
| { |
| if(i<6) |
| { |
| if(!sps->seq_scaling_list_present_flag[i]) // fall-back rule A |
| { |
| if((i==0) || (i==3)) |
| qmatrix[i] = (i==0) ? quant_intra_default:quant_inter_default; |
| else |
| qmatrix[i] = qmatrix[i-1]; |
| } |
| else |
| { |
| if(sps->UseDefaultScalingMatrix4x4Flag[i]) |
| qmatrix[i] = (i<3) ? quant_intra_default:quant_inter_default; |
| else |
| qmatrix[i] = sps->ScalingList4x4[i]; |
| } |
| } |
| else |
| { |
| if(!sps->seq_scaling_list_present_flag[i] || sps->UseDefaultScalingMatrix8x8Flag[i-6]) // fall-back rule A |
| qmatrix[i] = (i==6) ? quant8_intra_default:quant8_inter_default; |
| else |
| qmatrix[i] = sps->ScalingList8x8[i-6]; |
| } |
| } |
| } |
| |
| if(pps->pic_scaling_matrix_present_flag) // then check pps |
| { |
| for(i=0; i<8; i++) |
| { |
| if(i<6) |
| { |
| if(!pps->pic_scaling_list_present_flag[i]) // fall-back rule B |
| { |
| if((i==0) || (i==3)) |
| { |
| if(!sps->seq_scaling_matrix_present_flag) |
| qmatrix[i] = (i==0) ? quant_intra_default:quant_inter_default; |
| } |
| else |
| qmatrix[i] = qmatrix[i-1]; |
| } |
| else |
| { |
| if(pps->UseDefaultScalingMatrix4x4Flag[i]) |
| qmatrix[i] = (i<3) ? quant_intra_default:quant_inter_default; |
| else |
| qmatrix[i] = pps->ScalingList4x4[i]; |
| } |
| } |
| else |
| { |
| if(!pps->pic_scaling_list_present_flag[i]) // fall-back rule B |
| { |
| if(!sps->seq_scaling_matrix_present_flag) |
| qmatrix[i] = (i==6) ? quant8_intra_default:quant8_inter_default; |
| } |
| else if(pps->UseDefaultScalingMatrix8x8Flag[i-6]) |
| qmatrix[i] = (i==6) ? quant8_intra_default:quant8_inter_default; |
| else |
| qmatrix[i] = pps->ScalingList8x8[i-6]; |
| } |
| } |
| } |
| } |
| |
| CalculateQuantParam(); |
| if(pps->transform_8x8_mode_flag) |
| CalculateQuant8Param(); |
| } |
| |
| /*! |
| ************************************************************************ |
| * \brief |
| * For calculating the quantisation values at frame level |
| * |
| ************************************************************************ |
| */ |
| void CalculateQuantParam() |
| { |
| int i, j, k, temp; |
| |
| for(k=0; k<6; k++) |
| for(j=0; j<4; j++) |
| for(i=0; i<4; i++) |
| { |
| temp = (i<<2)+j; |
| InvLevelScale4x4Luma_Intra[k][i][j] = dequant_coef[k][j][i]*qmatrix[0][temp]; |
| InvLevelScale4x4Chroma_Intra[0][k][i][j] = dequant_coef[k][j][i]*qmatrix[1][temp]; |
| InvLevelScale4x4Chroma_Intra[1][k][i][j] = dequant_coef[k][j][i]*qmatrix[2][temp]; |
| |
| InvLevelScale4x4Luma_Inter[k][i][j] = dequant_coef[k][j][i]*qmatrix[3][temp]; |
| InvLevelScale4x4Chroma_Inter[0][k][i][j] = dequant_coef[k][j][i]*qmatrix[4][temp]; |
| InvLevelScale4x4Chroma_Inter[1][k][i][j] = dequant_coef[k][j][i]*qmatrix[5][temp]; |
| } |
| } |
| |
| /*! |
| *********************************************************************** |
| * \brief |
| * Luma DC inverse transform |
| *********************************************************************** |
| */ |
| void itrans_2(struct img_par *img) //!< image parameters |
| { |
| int i,j; |
| int M5[4]; |
| int M6[4]; |
| |
| int qp_per = (img->qp + img->bitdepth_luma_qp_scale - MIN_QP)/6; |
| int qp_rem = (img->qp + img->bitdepth_luma_qp_scale - MIN_QP)%6; |
| |
| // horizontal |
| for (j=0;j<4;j++) |
| { |
| M5[0]=img->cof[0][j][0][0]; |
| M5[1]=img->cof[1][j][0][0]; |
| M5[2]=img->cof[2][j][0][0]; |
| M5[3]=img->cof[3][j][0][0]; |
| |
| M6[0]=M5[0]+M5[2]; |
| M6[1]=M5[0]-M5[2]; |
| M6[2]=M5[1]-M5[3]; |
| M6[3]=M5[1]+M5[3]; |
| |
| img->cof[0][j][0][0] = M6[0]+M6[3]; |
| img->cof[1][j][0][0] = M6[1]+M6[2]; |
| img->cof[2][j][0][0] = M6[1]-M6[2]; |
| img->cof[3][j][0][0] = M6[0]-M6[3]; |
| } |
| |
| // vertical |
| for (i=0;i<4;i++) |
| { |
| M5[0]=img->cof[i][0][0][0]; |
| M5[1]=img->cof[i][1][0][0]; |
| M5[2]=img->cof[i][2][0][0]; |
| M5[3]=img->cof[i][3][0][0]; |
| |
| M6[0]=M5[0]+M5[2]; |
| M6[1]=M5[0]-M5[2]; |
| M6[2]=M5[1]-M5[3]; |
| M6[3]=M5[1]+M5[3]; |
| |
| img->cof[i][0][0][0] = rshift_rnd((((M6[0]+M6[3])*InvLevelScale4x4Luma_Intra[qp_rem][0][0]) << qp_per), 6); |
| img->cof[i][1][0][0] = rshift_rnd((((M6[1]+M6[2])*InvLevelScale4x4Luma_Intra[qp_rem][0][0]) << qp_per), 6); |
| img->cof[i][2][0][0] = rshift_rnd((((M6[1]-M6[2])*InvLevelScale4x4Luma_Intra[qp_rem][0][0]) << qp_per), 6); |
| img->cof[i][3][0][0] = rshift_rnd((((M6[0]-M6[3])*InvLevelScale4x4Luma_Intra[qp_rem][0][0]) << qp_per), 6); |
| } |
| } |
| |
| |
| void itrans_sp(struct img_par *img, //!< image parameters |
| int ioff, //!< index to 4x4 block |
| int joff, //!< |
| int i0, //!< |
| int j0) //!< |
| { |
| int i,j,i1,j1; |
| int m5[4]; |
| int m6[4]; |
| int predicted_block[BLOCK_SIZE][BLOCK_SIZE],ilev; |
| |
| int qp_per = (img->qp-MIN_QP)/6; |
| int qp_rem = (img->qp-MIN_QP)%6; |
| int q_bits = Q_BITS+qp_per; |
| |
| int qp_per_sp = (img->qpsp-MIN_QP)/6; |
| int qp_rem_sp = (img->qpsp-MIN_QP)%6; |
| int q_bits_sp = Q_BITS+qp_per_sp; |
| int qp_const2 = (1<<q_bits_sp)/2; //sp_pred |
| if (img->type == SI_SLICE) //ES modified |
| { |
| qp_per = (img->qpsp-MIN_QP)/6; |
| qp_rem = (img->qpsp-MIN_QP)%6; |
| q_bits = Q_BITS+qp_per; |
| } |
| |
| for (j=0; j< BLOCK_SIZE; j++) |
| for (i=0; i< BLOCK_SIZE; i++) |
| predicted_block[i][j]=img->mpr[j+joff][i+ioff]; |
| for (j=0; j < BLOCK_SIZE; j++) |
| { |
| for (i=0; i < 2; i++) |
| { |
| i1=3-i; |
| m5[i]=predicted_block[i][j]+predicted_block[i1][j]; |
| m5[i1]=predicted_block[i][j]-predicted_block[i1][j]; |
| } |
| predicted_block[0][j]=(m5[0]+m5[1]); |
| predicted_block[2][j]=(m5[0]-m5[1]); |
| predicted_block[1][j]=m5[3]*2+m5[2]; |
| predicted_block[3][j]=m5[3]-m5[2]*2; |
| } |
| |
| // Vertival transform |
| |
| for (i=0; i < BLOCK_SIZE; i++) |
| { |
| for (j=0; j < 2; j++) |
| { |
| j1=3-j; |
| m5[j]=predicted_block[i][j]+predicted_block[i][j1]; |
| m5[j1]=predicted_block[i][j]-predicted_block[i][j1]; |
| } |
| predicted_block[i][0]=(m5[0]+m5[1]); |
| predicted_block[i][2]=(m5[0]-m5[1]); |
| predicted_block[i][1]=m5[3]*2+m5[2]; |
| predicted_block[i][3]=m5[3]-m5[2]*2; |
| } |
| |
| for (j=0;j<BLOCK_SIZE;j++) |
| for (i=0;i<BLOCK_SIZE;i++) |
| { |
| // recovering coefficient since they are already dequantized earlier |
| img->cof[i0][j0][j][i]=(img->cof[i0][j0][j][i] >> qp_per) / dequant_coef[qp_rem][i][j]; |
| if(img->sp_switch || img->type==SI_SLICE) //M.W. patched for SI |
| { |
| ilev=(iabs(predicted_block[i][j]) * quant_coef[qp_rem_sp][i][j] + qp_const2) >> q_bits_sp; //ES added |
| ilev= isignab(ilev,predicted_block[i][j])+ img->cof[i0][j0][j][i]; //ES added |
| img->cof[i0][j0][j][i] = isignab(iabs(ilev) * dequant_coef[qp_rem_sp][i][j] << qp_per_sp ,ilev) ; //ES added |
| } //ES added |
| else |
| { //ES added |
| ilev=((img->cof[i0][j0][j][i]*dequant_coef[qp_rem][i][j]*A[i][j]<< qp_per) >>6)+predicted_block[i][j] ; |
| img->cof[i0][j0][j][i]=isignab((iabs(ilev) * quant_coef[qp_rem_sp][i][j] + qp_const2) >> q_bits_sp, ilev) * dequant_coef[qp_rem_sp][i][j] << qp_per_sp; |
| } |
| } |
| // horizontal |
| for (j=0;j<BLOCK_SIZE;j++) |
| { |
| for (i=0;i<BLOCK_SIZE;i++) |
| { |
| m5[i]=img->cof[i0][j0][j][i]; |
| } |
| m6[0]=(m5[0]+m5[2]); |
| m6[1]=(m5[0]-m5[2]); |
| m6[2]=(m5[1]>>1)-m5[3]; |
| m6[3]=m5[1]+(m5[3]>>1); |
| |
| for (i=0;i<2;i++) |
| { |
| i1=3-i; |
| img->m7[j][i]=m6[i]+m6[i1]; |
| img->m7[j][i1]=m6[i]-m6[i1]; |
| } |
| } |
| // vertical |
| for (i=0;i<BLOCK_SIZE;i++) |
| { |
| for (j=0;j<BLOCK_SIZE;j++) |
| m5[j]=img->m7[j][i]; |
| |
| m6[0]=(m5[0]+m5[2]); |
| m6[1]=(m5[0]-m5[2]); |
| m6[2]=(m5[1]>>1)-m5[3]; |
| m6[3]=m5[1]+(m5[3]>>1); |
| |
| for (j=0;j<2;j++) |
| { |
| j1=3-j; |
| img->m7[j][i] =iClip1(img->max_imgpel_value,rshift_rnd_sf((m6[j]+m6[j1]),DQ_BITS)); |
| img->m7[j1][i]=iClip1(img->max_imgpel_value,rshift_rnd_sf((m6[j]-m6[j1]),DQ_BITS)); |
| } |
| } |
| } |
| |
| /*! |
| *********************************************************************** |
| * \brief |
| * The routine performs transform,quantization,inverse transform, adds the diff. |
| * to the prediction and writes the result to the decoded luma frame. Includes the |
| * RD constrained quantization also. |
| * |
| * \par Input: |
| * block_x,block_y: Block position inside a macro block (0,4,8,12). |
| * |
| * \par Output: |
| * nonzero: 0 if no levels are nonzero. 1 if there are nonzero levels. \n |
| * coeff_cost: Counter for nonzero coefficients, used to discard expencive levels. |
| ************************************************************************ |
| */ |
| void copyblock_sp(struct img_par *img,int block_x,int block_y) |
| { |
| int i,j,i1,j1,m5[4],m6[4]; |
| |
| int predicted_block[BLOCK_SIZE][BLOCK_SIZE]; |
| int qp_per = (img->qpsp-MIN_QP)/6; |
| int qp_rem = (img->qpsp-MIN_QP)%6; |
| int q_bits = Q_BITS+qp_per; |
| int qp_const2=(1<<q_bits)/2; //sp_pred |
| |
| |
| // Horizontal transform |
| for (j=0; j< BLOCK_SIZE; j++) |
| for (i=0; i< BLOCK_SIZE; i++) |
| predicted_block[i][j]=img->mpr[j+block_y][i+block_x]; |
| |
| for (j=0; j < BLOCK_SIZE; j++) |
| { |
| for (i=0; i < 2; i++) |
| { |
| i1=3-i; |
| m5[i]=predicted_block[i][j]+predicted_block[i1][j]; |
| m5[i1]=predicted_block[i][j]-predicted_block[i1][j]; |
| } |
| predicted_block[0][j]=(m5[0]+m5[1]); |
| predicted_block[2][j]=(m5[0]-m5[1]); |
| predicted_block[1][j]=m5[3]*2+m5[2]; |
| predicted_block[3][j]=m5[3]-m5[2]*2; |
| } |
| |
| // Vertival transform |
| |
| for (i=0; i < BLOCK_SIZE; i++) |
| { |
| for (j=0; j < 2; j++) |
| { |
| j1=3-j; |
| m5[j]=predicted_block[i][j]+predicted_block[i][j1]; |
| m5[j1]=predicted_block[i][j]-predicted_block[i][j1]; |
| } |
| predicted_block[i][0]=(m5[0]+m5[1]); |
| predicted_block[i][2]=(m5[0]-m5[1]); |
| predicted_block[i][1]=m5[3]*2+m5[2]; |
| predicted_block[i][3]=m5[3]-m5[2]*2; |
| } |
| |
| // Quant |
| for (j=0;j < BLOCK_SIZE; j++) |
| for (i=0; i < BLOCK_SIZE; i++) |
| img->m7[j][i]=isignab((iabs(predicted_block[i][j])* quant_coef[qp_rem][i][j]+qp_const2)>> q_bits,predicted_block[i][j])*dequant_coef[qp_rem][i][j]<<qp_per; |
| |
| // IDCT. |
| // horizontal |
| |
| for (j=0;j<BLOCK_SIZE;j++) |
| { |
| for (i=0;i<BLOCK_SIZE;i++) |
| { |
| m5[i]=img->m7[j][i]; |
| } |
| m6[0]=(m5[0]+m5[2]); |
| m6[1]=(m5[0]-m5[2]); |
| m6[2]=(m5[1]>>1)-m5[3]; |
| m6[3]=m5[1]+(m5[3]>>1); |
| |
| for (i=0;i<2;i++) |
| { |
| i1=3-i; |
| img->m7[j][i]=m6[i]+m6[i1]; |
| img->m7[j][i1]=m6[i]-m6[i1]; |
| } |
| } |
| // vertical |
| for (i=0;i<BLOCK_SIZE;i++) |
| { |
| for (j=0;j<BLOCK_SIZE;j++) |
| m5[j]=img->m7[j][i]; |
| |
| m6[0]=(m5[0]+m5[2]); |
| m6[1]=(m5[0]-m5[2]); |
| m6[2]=(m5[1]>>1)-m5[3]; |
| m6[3]=m5[1]+(m5[3]>>1); |
| |
| for (j=0;j<2;j++) |
| { |
| j1=3-j; |
| img->m7[j][i] =iClip1(img->max_imgpel_value,rshift_rnd_sf((m6[j]+m6[j1]),DQ_BITS)); |
| img->m7[j1][i]=iClip1(img->max_imgpel_value,rshift_rnd_sf((m6[j]-m6[j1]),DQ_BITS)); |
| } |
| } |
| |
| // Decoded block moved to frame memory |
| |
| for (j=0; j < BLOCK_SIZE; j++) |
| for (i=0; i < BLOCK_SIZE; i++) |
| dec_picture->imgY[img->pix_y+block_y+j][img->pix_x+block_x+i]=(imgpel) img->m7[j][i]; |
| |
| } |
| |
| void itrans_sp_chroma(struct img_par *img,int ll) |
| { |
| int i,j,i1,j2,ilev,n2,n1,j1,mb_y; |
| int m5[BLOCK_SIZE]; |
| int predicted_chroma_block[MB_BLOCK_SIZE/2][MB_BLOCK_SIZE/2],mp1[BLOCK_SIZE]; |
| int qp_per,qp_rem,q_bits; |
| int qp_per_sp,qp_rem_sp,q_bits_sp,qp_const2; |
| |
| qp_per = ((img->qp<0?img->qp:QP_SCALE_CR[img->qp])-MIN_QP)/6; |
| qp_rem = ((img->qp<0?img->qp:QP_SCALE_CR[img->qp])-MIN_QP)%6; |
| q_bits = Q_BITS+qp_per; |
| |
| qp_per_sp = ((img->qpsp<0?img->qpsp:QP_SCALE_CR[img->qpsp])-MIN_QP)/6; |
| qp_rem_sp = ((img->qpsp<0?img->qpsp:QP_SCALE_CR[img->qpsp])-MIN_QP)%6; |
| q_bits_sp = Q_BITS+qp_per_sp; |
| qp_const2=(1<<q_bits_sp)/2; //sp_pred |
| |
| if (img->type == SI_SLICE) |
| { |
| qp_per = ((img->qpsp < 0 ? img->qpsp : QP_SCALE_CR[img->qpsp]) - MIN_QP) / 6; |
| qp_rem = ((img->qpsp < 0 ? img->qpsp : QP_SCALE_CR[img->qpsp]) - MIN_QP) % 6; |
| q_bits = Q_BITS + qp_per; |
| } |
| |
| for (j=0; j < MB_BLOCK_SIZE/2; j++) |
| for (i=0; i < MB_BLOCK_SIZE/2; i++) |
| { |
| predicted_chroma_block[i][j]=img->mpr[j][i]; |
| img->mpr[j][i]=0; |
| } |
| for (n2=0; n2 <= BLOCK_SIZE; n2 += BLOCK_SIZE) |
| { |
| for (n1=0; n1 <= BLOCK_SIZE; n1 += BLOCK_SIZE) |
| { |
| // Horizontal transform. |
| for (j=0; j < BLOCK_SIZE; j++) |
| { |
| mb_y=n2+j; |
| for (i=0; i < 2; i++) |
| { |
| i1=3-i; |
| m5[i]=predicted_chroma_block[i+n1][mb_y]+predicted_chroma_block[i1+n1][mb_y]; |
| m5[i1]=predicted_chroma_block[i+n1][mb_y]-predicted_chroma_block[i1+n1][mb_y]; |
| } |
| predicted_chroma_block[n1][mb_y] =(m5[0]+m5[1]); |
| predicted_chroma_block[n1+2][mb_y]=(m5[0]-m5[1]); |
| predicted_chroma_block[n1+1][mb_y]=m5[3]*2+m5[2]; |
| predicted_chroma_block[n1+3][mb_y]=m5[3]-m5[2]*2; |
| } |
| |
| // Vertical transform. |
| |
| for (i=0; i < BLOCK_SIZE; i++) |
| { |
| j1=n1+i; |
| for (j=0; j < 2; j++) |
| { |
| j2=3-j; |
| m5[j]=predicted_chroma_block[j1][n2+j]+predicted_chroma_block[j1][n2+j2]; |
| m5[j2]=predicted_chroma_block[j1][n2+j]-predicted_chroma_block[j1][n2+j2]; |
| } |
| predicted_chroma_block[j1][n2+0]=(m5[0]+m5[1]); |
| predicted_chroma_block[j1][n2+2]=(m5[0]-m5[1]); |
| predicted_chroma_block[j1][n2+1]=m5[3]*2+m5[2]; |
| predicted_chroma_block[j1][n2+3]=m5[3]-m5[2]*2; |
| } |
| } |
| } |
| |
| // 2X2 transform of DC coeffs. |
| mp1[0]=(predicted_chroma_block[0][0]+predicted_chroma_block[4][0]+predicted_chroma_block[0][4]+predicted_chroma_block[4][4]); |
| mp1[1]=(predicted_chroma_block[0][0]-predicted_chroma_block[4][0]+predicted_chroma_block[0][4]-predicted_chroma_block[4][4]); |
| mp1[2]=(predicted_chroma_block[0][0]+predicted_chroma_block[4][0]-predicted_chroma_block[0][4]-predicted_chroma_block[4][4]); |
| mp1[3]=(predicted_chroma_block[0][0]-predicted_chroma_block[4][0]-predicted_chroma_block[0][4]+predicted_chroma_block[4][4]); |
| |
| for (n1=0; n1 < 2; n1 ++) |
| for (n2=0; n2 < 2; n2 ++) |
| { |
| if (img->sp_switch || img->type==SI_SLICE) //M.W. patched for SI |
| { |
| //quantization fo predicted block |
| ilev=(iabs (mp1[n1+n2*2]) * quant_coef[qp_rem_sp][0][0] + 2 * qp_const2) >> (q_bits_sp + 1); |
| //addition |
| ilev=img->cof[n1+ll][4+n2][0][0]+isignab(ilev,mp1[n1+n2*2]); |
| //dequantization |
| mp1[n1+n2*2] =ilev*dequant_coef[qp_rem_sp][0][0]<<qp_per_sp; |
| } |
| else |
| { |
| ilev=((img->cof[n1+ll][4+n2][0][0]*dequant_coef[qp_rem][0][0]*A[0][0]<< qp_per) >>5)+mp1[n1+n2*2] ; |
| mp1[n1+n2*2]=isignab((iabs(ilev)* quant_coef[qp_rem_sp][0][0]+ 2 * qp_const2)>> (q_bits_sp+1),ilev)*dequant_coef[qp_rem_sp][0][0]<<qp_per_sp; |
| } |
| } |
| |
| |
| for (n2=0; n2 < 2; n2 ++) |
| for (n1=0; n1 < 2; n1 ++) |
| for (i=0;i< BLOCK_SIZE; i++) |
| for (j=0;j< BLOCK_SIZE; j++) |
| { |
| // recovering coefficient since they are already dequantized earlier |
| img->cof[n1+ll][4+n2][j][i] = (img->cof[n1+ll][4+n2][j][i] >> qp_per) / dequant_coef[qp_rem][i][j]; |
| |
| if (img->sp_switch || img->type==SI_SLICE) //M.W. patched for SI |
| { |
| //quantization of the predicted block |
| ilev = (iabs(predicted_chroma_block[n1*BLOCK_SIZE+i][n2*BLOCK_SIZE+j]) * quant_coef[qp_rem_sp][i][j] + qp_const2) >> q_bits_sp; |
| //addition of the residual |
| ilev = isignab(ilev,predicted_chroma_block[n1*BLOCK_SIZE+i][n2*BLOCK_SIZE+j]) + img->cof[n1+ll][4+n2][j][i]; |
| // Inverse quantization |
| img->cof[n1+ll][4+n2][j][i] = ilev * dequant_coef[qp_rem_sp][i][j] << qp_per_sp ; |
| } |
| else |
| { |
| //dequantization and addition of the predicted block |
| ilev=((img->cof[n1+ll][4+n2][j][i]*dequant_coef[qp_rem][i][j]*A[i][j]<< qp_per) >>6)+predicted_chroma_block[n1*BLOCK_SIZE+i][n2*BLOCK_SIZE+j] ; |
| //quantization and dequantization |
| img->cof[n1+ll][4+n2][j][i] = isignab((iabs(ilev) * quant_coef[qp_rem_sp][i][j] + qp_const2)>> q_bits_sp,ilev)*dequant_coef[qp_rem_sp][i][j]<<qp_per_sp; |
| } |
| } |
| img->cof[0+ll][4][0][0]=(mp1[0]+mp1[1]+mp1[2]+mp1[3])>>1; |
| img->cof[1+ll][4][0][0]=(mp1[0]-mp1[1]+mp1[2]-mp1[3])>>1; |
| img->cof[0+ll][5][0][0]=(mp1[0]+mp1[1]-mp1[2]-mp1[3])>>1; |
| img->cof[1+ll][5][0][0]=(mp1[0]-mp1[1]-mp1[2]+mp1[3])>>1; |
| } |
| |
