| |
| /*! |
| ************************************************************************************* |
| * \file macroblock.c |
| * |
| * \brief |
| * Process one macroblock |
| * |
| * \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> |
| * - Jani Lainema <jani.lainema@nokia.com> |
| * - Sebastian Purreiter <sebastian.purreiter@mch.siemens.de> |
| * - Detlev Marpe <marpe@hhi.de> |
| * - Thomas Wedi <wedi@tnt.uni-hannover.de> |
| * - Ragip Kurceren <ragip.kurceren@nokia.com> |
| * - Alexis Michael Tourapis <alexismt@ieee.org> |
| ************************************************************************************* |
| */ |
| |
| #include "contributors.h" |
| |
| #include <stdlib.h> |
| #include <assert.h> |
| #include <limits.h> |
| #include <memory.h> |
| |
| #include "global.h" |
| |
| #include "elements.h" |
| #include "macroblock.h" |
| #include "refbuf.h" |
| #include "fmo.h" |
| #include "vlc.h" |
| #include "image.h" |
| #include "mb_access.h" |
| #include "ratectl.h" // header file for rate control |
| #include "rc_quadratic.h" |
| #include "cabac.h" |
| #include "transform8x8.h" |
| #include "me_fullsearch.h" |
| #include "symbol.h" |
| |
| #if TRACE |
| #define TRACE_SE(trace,str) snprintf(trace,TRACESTRING_SIZE,str) |
| #else |
| #define TRACE_SE(trace,str) |
| #endif |
| |
| extern const byte QP_SCALE_CR[52] ; |
| |
| //Rate control |
| int predict_error,dq; |
| extern int delta_qp_mbaff[2][2],delta_qp_mbaff[2][2]; |
| extern int qp_mbaff[2][2],qp_mbaff[2][2]; |
| |
| // function pointer for different ways of obtaining chroma interpolation |
| static void (*OneComponentChromaPrediction4x4) (imgpel* , int , int , short****** , int , short , int , int ); |
| static void OneComponentChromaPrediction4x4_regenerate (imgpel* , int , int , short****** , int , short , int , int ); |
| static void OneComponentChromaPrediction4x4_retrieve (imgpel* , int , int , short****** , int , short , int , int ); |
| |
| static int slice_too_big(int rlc_bits); |
| |
| static int writeChromaIntraPredMode (void); |
| static int writeMotionInfo2NAL (void); |
| static int writeChromaCoeff (void); |
| static int writeCBPandLumaCoeff (void); |
| |
| extern int *mvbits; |
| |
| extern int QP2QUANT[40]; |
| extern int ver_offset[4][8][4]; |
| extern int hor_offset[4][8][4]; |
| |
| static int diff [16]; |
| static int diff64[64]; |
| static const unsigned char subblk_offset_x[3][8][4] = |
| { |
| { {0, 4, 0, 4}, |
| {0, 4, 0, 4}, |
| {0, 0, 0, 0}, |
| {0, 0, 0, 0}, |
| {0, 0, 0, 0}, |
| {0, 0, 0, 0}, |
| {0, 0, 0, 0}, |
| {0, 0, 0, 0}, }, |
| |
| { {0, 4, 0, 4}, |
| {0, 4, 0, 4}, |
| {0, 4, 0, 4}, |
| {0, 4, 0, 4}, |
| {0, 0, 0, 0}, |
| {0, 0, 0, 0}, |
| {0, 0, 0, 0}, |
| {0, 0, 0, 0}, }, |
| |
| { {0, 4, 0, 4}, |
| {8,12, 8,12}, |
| {0, 4, 0, 4}, |
| {8,12, 8,12}, |
| {0, 4, 0, 4}, |
| {8,12, 8,12}, |
| {0, 4, 0, 4}, |
| {8,12, 8,12} } |
| }; |
| |
| static const unsigned char subblk_offset_y[3][8][4] = |
| { |
| { {0, 0, 4, 4}, |
| {0, 0, 4, 4}, |
| {0, 0, 0, 0}, |
| {0, 0, 0, 0}, |
| {0, 0, 0, 0}, |
| {0, 0, 0, 0}, |
| {0, 0, 0, 0}, |
| {0, 0, 0, 0}, }, |
| |
| { {0, 0, 4, 4}, |
| {8, 8,12,12}, |
| {0, 0, 4, 4}, |
| {8, 8,12,12}, |
| {0, 0, 0, 0}, |
| {0, 0, 0, 0}, |
| {0, 0, 0, 0}, |
| {0, 0, 0, 0} }, |
| |
| { {0, 0, 4, 4}, |
| {0, 0, 4, 4}, |
| {8, 8,12,12}, |
| {8, 8,12,12}, |
| {0, 0, 4, 4}, |
| {0, 0, 4, 4}, |
| {8, 8,12,12}, |
| {8, 8,12,12} } |
| }; |
| |
| |
| /*! |
| ************************************************************************ |
| * \brief |
| * updates the coordinates for the next macroblock to be processed |
| * |
| * \param mb_addr |
| * macroblock address in scan order |
| ************************************************************************ |
| */ |
| void set_MB_parameters (int mb_addr) |
| { |
| img->current_mb_nr = mb_addr; |
| |
| get_mb_block_pos(mb_addr, &img->mb_x, &img->mb_y); |
| |
| img->block_x = img->mb_x << 2; |
| img->block_y = img->mb_y << 2; |
| |
| img->pix_x = img->block_x << 2; |
| img->pix_y = img->block_y << 2; |
| |
| img->opix_x = img->pix_x; |
| |
| if (img->MbaffFrameFlag) |
| { |
| if (img->mb_data[mb_addr].mb_field) |
| { |
| imgY_org = (mb_addr % 2) ? imgY_org_bot : imgY_org_top; |
| imgUV_org = (mb_addr % 2) ? imgUV_org_bot : imgUV_org_top; |
| img->opix_y = (img->mb_y >> 1 ) << 4; |
| img->mb_data[mb_addr].list_offset = (mb_addr % 2) ? 4 : 2; |
| } |
| else |
| { |
| imgY_org = imgY_org_frm; |
| imgUV_org = imgUV_org_frm; |
| img->opix_y = img->block_y << 2; |
| img->mb_data[mb_addr].list_offset = 0; |
| } |
| } |
| else |
| { |
| img->opix_y = img->block_y << 2; |
| img->mb_data[mb_addr].list_offset = 0; |
| } |
| |
| if (img->yuv_format != YUV400) |
| { |
| img->pix_c_x = (img->mb_cr_size_x * img->pix_x) >> 4; |
| img->pix_c_y = (img->mb_cr_size_y * img->pix_y) >> 4; |
| |
| img->opix_c_x = (img->mb_cr_size_x * img->opix_x) >> 4; |
| img->opix_c_y = (img->mb_cr_size_y * img->opix_y) >> 4; |
| } |
| // printf ("set_MB_parameters: mb %d, mb_x %d, mb_y %d\n", mb_addr, img->mb_x, img->mb_y); |
| } |
| |
| |
| /*! |
| ************************************************************************ |
| * \brief |
| * updates the coordinates and statistics parameter for the |
| * next macroblock |
| ************************************************************************ |
| */ |
| void proceed2nextMacroblock(void) |
| { |
| #if TRACE |
| int use_bitstream_backing = (input->slice_mode == FIXED_RATE || input->slice_mode == CALLBACK); |
| #endif |
| Macroblock *currMB = &img->mb_data[img->current_mb_nr]; |
| int* bitCount = currMB->bitcounter; |
| int i; |
| |
| if (bitCount[BITS_TOTAL_MB] > img->max_bitCount) |
| printf("Warning!!! Number of bits (%d) of macroblock_layer() data seems to exceed defined limit (%d).\n", bitCount[BITS_TOTAL_MB],img->max_bitCount); |
| |
| // Update the statistics |
| stats->bit_use_mb_type[img->type] += bitCount[BITS_MB_MODE]; |
| stats->bit_use_coeffY[img->type] += bitCount[BITS_COEFF_Y_MB] ; |
| stats->tmp_bit_use_cbp[img->type] += bitCount[BITS_CBP_MB]; |
| stats->bit_use_coeffC[img->type] += bitCount[BITS_COEFF_UV_MB]; |
| stats->bit_use_delta_quant[img->type] += bitCount[BITS_DELTA_QUANT_MB]; |
| |
| if (IS_INTRA(currMB)) |
| { |
| ++stats->intra_chroma_mode[currMB->c_ipred_mode]; |
| |
| if ((currMB->cbp&15) != 0) |
| { |
| if (currMB->luma_transform_size_8x8_flag) |
| ++stats->mode_use_transform_8x8[img->type][currMB->mb_type]; |
| else |
| ++stats->mode_use_transform_4x4[img->type][currMB->mb_type]; |
| } |
| } |
| |
| ++stats->mode_use[img->type][currMB->mb_type]; |
| stats->bit_use_mode[img->type][currMB->mb_type]+= bitCount[BITS_INTER_MB]; |
| |
| if (img->type != I_SLICE) |
| { |
| if (currMB->mb_type == P8x8) |
| { |
| for(i=0;i<4;i++) |
| { |
| if (currMB->b8mode[i] > 0) |
| ++stats->mode_use[img->type][currMB->b8mode[i]]; |
| else |
| ++stats->b8_mode_0_use[img->type][currMB->luma_transform_size_8x8_flag]; |
| |
| if (currMB->b8mode[i]==4) |
| { |
| if ((currMB->luma_transform_size_8x8_flag && (currMB->cbp&15) != 0) || input->Transform8x8Mode == 2) |
| ++stats->mode_use_transform_8x8[img->type][4]; |
| else |
| ++stats->mode_use_transform_4x4[img->type][4]; |
| } |
| } |
| } |
| else if (currMB->mb_type >= 0 && currMB->mb_type <=3 && ((currMB->cbp&15) != 0)) |
| { |
| if (currMB->luma_transform_size_8x8_flag) |
| ++stats->mode_use_transform_8x8[img->type][currMB->mb_type]; |
| else |
| ++stats->mode_use_transform_4x4[img->type][currMB->mb_type]; |
| } |
| } |
| |
| // Statistics |
| if ((img->type == P_SLICE)||(img->type==SP_SLICE) ) |
| { |
| ++stats->quant0; |
| stats->quant1 += currMB->qp; // to find average quant for inter frames |
| } |
| } |
| |
| /*! |
| ************************************************************************ |
| * \brief |
| * updates chroma QP according to luma QP and bit depth |
| ************************************************************************ |
| */ |
| void set_chroma_qp(Macroblock *currMB) |
| { |
| int i; |
| for (i=0; i<2; i++) |
| { |
| currMB->qpc[i] = iClip3 ( -img->bitdepth_chroma_qp_scale, 51, currMB->qp + img->chroma_qp_offset[i] ); |
| currMB->qpc[i] = currMB->qpc[i] < 0 ? currMB->qpc[i] : QP_SCALE_CR[currMB->qpc[i]]; |
| } |
| } |
| |
| /*! |
| ************************************************************************ |
| * \brief |
| * initializes the current macroblock |
| * |
| * \param mb_addr |
| * macroblock address in scan order |
| * \param mb_field |
| * true for field macroblock coding |
| ************************************************************************ |
| */ |
| void start_macroblock(int mb_addr, int mb_field) |
| { |
| int i,j,l; |
| int use_bitstream_backing = (input->slice_mode == FIXED_RATE || input->slice_mode == CALLBACK); |
| Macroblock *currMB = &img->mb_data[mb_addr]; |
| Slice *curr_slice = img->currentSlice; |
| DataPartition *dataPart; |
| Bitstream *currStream; |
| int prev_mb; |
| |
| currMB->mb_field = mb_field; |
| |
| enc_picture->mb_field[mb_addr] = mb_field; |
| currMB->is_field_mode = (img->field_picture || ( img->MbaffFrameFlag && currMB->mb_field)); |
| |
| set_MB_parameters (mb_addr); |
| |
| prev_mb = FmoGetPreviousMBNr(img->current_mb_nr); |
| |
| if(use_bitstream_backing) |
| { |
| if ((!input->MbInterlace)||((mb_addr&1)==0)) // KS: MB AFF -> store stream positions for |
| // first macroblock only |
| { |
| // Keep the current state of the bitstreams |
| if(!img->cod_counter) |
| { |
| for (i=0; i<curr_slice->max_part_nr; i++) |
| { |
| dataPart = &(curr_slice->partArr[i]); |
| currStream = dataPart->bitstream; |
| currStream->stored_bits_to_go = currStream->bits_to_go; |
| currStream->stored_byte_pos = currStream->byte_pos; |
| currStream->stored_byte_buf = currStream->byte_buf; |
| stats->stored_bit_slice = stats->bit_slice; |
| |
| if (input->symbol_mode ==CABAC) |
| { |
| dataPart->ee_recode = dataPart->ee_cabac; |
| } |
| } |
| } |
| } |
| } |
| |
| // Save the slice number of this macroblock. When the macroblock below |
| // is coded it will use this to decide if prediction for above is possible |
| currMB->slice_nr = img->current_slice_nr; |
| |
| // Initialize delta qp change from last macroblock. Feature may be used for future rate control |
| // Rate control |
| currMB->qpsp = img->qpsp; |
| if(input->RCEnable) |
| { |
| if (prev_mb > -1) |
| { |
| if ( input->MbInterlace == ADAPTIVE_CODING && !img->bot_MB && currMB->mb_field ) |
| { |
| currMB->qp = img->qp = img->mb_data[prev_mb].qp; |
| } |
| currMB->prev_qp = img->mb_data[prev_mb].qp; |
| if (img->mb_data[prev_mb].slice_nr == img->current_slice_nr) |
| { |
| currMB->prev_delta_qp = img->mb_data[prev_mb].delta_qp; |
| } |
| else |
| { |
| currMB->prev_delta_qp = 0; |
| } |
| } |
| else |
| { |
| currMB->prev_qp = curr_slice->qp; |
| currMB->prev_delta_qp = 0; |
| } |
| // frame layer rate control |
| if(input->basicunit==img->FrameSizeInMbs) |
| { |
| currMB->delta_qp = 0; |
| currMB->qp = img->qp; |
| } |
| // basic unit layer rate control |
| else |
| { |
| // each I or B frame has only one QP |
| if( ((img->type == I_SLICE || img->type == B_SLICE) && input->RCUpdateMode != RC_MODE_1 ) || (!IMG_NUMBER) ) |
| { |
| currMB->delta_qp = 0; |
| currMB->qp = img->qp; |
| } |
| else if( img->type == P_SLICE || input->RCUpdateMode == RC_MODE_1 ) |
| { |
| if (!img->write_macroblock) //write macroblock |
| { |
| if (prev_mb < 0) //first macroblock (of slice) |
| { |
| // Initialize delta qp change from last macroblock. Feature may be used for future rate control |
| currMB->delta_qp = 0; |
| currMB->qp = img->qp; |
| delta_qp_mbaff[currMB->mb_field][img->bot_MB] = currMB->delta_qp; |
| qp_mbaff [currMB->mb_field][img->bot_MB] = currMB->qp; |
| } |
| else |
| { |
| if (!((input->MbInterlace) && img->bot_MB)) //top macroblock |
| { |
| if (img->mb_data[prev_mb].prev_cbp == 1) |
| { |
| currMB->delta_qp = 0; |
| currMB->qp = img->qp; |
| } |
| else |
| { |
| currMB->qp = img->mb_data[prev_mb].prev_qp; |
| currMB->delta_qp = currMB->qp - img->mb_data[prev_mb].qp; |
| img->qp = currMB->qp; |
| } |
| delta_qp_mbaff[currMB->mb_field][img->bot_MB] = currMB->delta_qp; |
| qp_mbaff [currMB->mb_field][img->bot_MB] = currMB->qp; |
| } |
| else //bottom macroblock |
| { |
| // Initialize delta qp change from last macroblock. Feature may be used for future rate control |
| currMB->delta_qp = 0; |
| currMB->qp = img->qp; // needed in loop filter (even if constant QP is used) |
| } |
| } |
| } |
| else |
| { |
| if (!img->bot_MB) //write top macroblock |
| { |
| if (img->write_mbaff_frame) |
| { |
| currMB->delta_qp = delta_qp_mbaff[0][img->bot_MB]; |
| img->qp = currMB->qp = qp_mbaff[0][img->bot_MB]; |
| //set_chroma_qp(currMB); |
| } |
| else |
| { |
| if (prev_mb < 0) //first macroblock (of slice) |
| { |
| // Initialize delta qp change from last macroblock. Feature may be used for future rate control |
| currMB->delta_qp = 0; |
| currMB->qp = img->qp; |
| delta_qp_mbaff[currMB->mb_field][img->bot_MB] = currMB->delta_qp; |
| qp_mbaff [currMB->mb_field][img->bot_MB] = currMB->qp; |
| } |
| else |
| { |
| currMB->delta_qp = delta_qp_mbaff[1][img->bot_MB]; |
| img->qp = currMB->qp = qp_mbaff[1][img->bot_MB]; |
| //set_chroma_qp(currMB); |
| } |
| } |
| } |
| else //write bottom macroblock |
| { |
| currMB->delta_qp = 0; |
| currMB->qp = img->qp; |
| set_chroma_qp(currMB); |
| } |
| } |
| |
| // compute the quantization parameter for each basic unit of P frame |
| if (!img->write_macroblock) |
| { |
| if(!((input->MbInterlace) && img->bot_MB)) |
| { |
| if((img->NumberofCodedMacroBlocks>0) && (img->NumberofCodedMacroBlocks%img->BasicUnit==0)) |
| { |
| // frame coding |
| if(active_sps->frame_mbs_only_flag) |
| { |
| updateRCModel(quadratic_RC); |
| img->BasicUnitQP=updateQP(quadratic_RC, generic_RC->TopFieldFlag); |
| } |
| // picture adaptive field/frame coding |
| else if((input->PicInterlace!=FRAME_CODING)&&(!input->MbInterlace)&&(generic_RC->NoGranularFieldRC==0)) |
| { |
| updateRCModel(quadratic_RC); |
| img->BasicUnitQP=updateQP(quadratic_RC, generic_RC->TopFieldFlag); |
| } |
| // mb adaptive f/f coding, field coding |
| else if((input->MbInterlace)) |
| { |
| updateRCModel(quadratic_RC); |
| img->BasicUnitQP=updateQP(quadratic_RC, generic_RC->TopFieldFlag); |
| } |
| } |
| |
| if(img->current_mb_nr==0) |
| img->BasicUnitQP=img->qp; |
| |
| currMB->predict_qp = iClip3(currMB->qp - img->min_qp_delta, currMB->qp + img->max_qp_delta, img->BasicUnitQP); |
| |
| dq = currMB->delta_qp + currMB->predict_qp - currMB->qp; |
| if(dq < -img->min_qp_delta) |
| { |
| dq = -img->min_qp_delta; |
| predict_error = dq-currMB->delta_qp; |
| img->qp = img->qp+predict_error; |
| currMB->delta_qp = -img->min_qp_delta; |
| } |
| else if(dq > img->max_qp_delta) |
| { |
| dq = img->max_qp_delta; |
| predict_error = dq - currMB->delta_qp; |
| img->qp = img->qp + predict_error; |
| currMB->delta_qp = img->max_qp_delta; |
| } |
| else |
| { |
| currMB->delta_qp = dq; |
| predict_error=currMB->predict_qp-currMB->qp; |
| img->qp = currMB->predict_qp; |
| } |
| currMB->qp = img->qp; |
| if (input->MbInterlace) |
| { |
| delta_qp_mbaff[currMB->mb_field][img->bot_MB] = currMB->delta_qp; |
| qp_mbaff [currMB->mb_field][img->bot_MB] = currMB->qp; |
| } |
| currMB->predict_error=predict_error; |
| } |
| else |
| currMB->prev_qp=img->qp; |
| } |
| } |
| } |
| } |
| else |
| { |
| Slice* currSlice = img->currentSlice; |
| |
| if (prev_mb>-1) |
| { |
| currMB->prev_qp = img->mb_data[prev_mb].qp; |
| currMB->prev_delta_qp = (img->mb_data[prev_mb].slice_nr == img->current_slice_nr) ? img->mb_data[prev_mb].delta_qp : 0; |
| } |
| else |
| { |
| currMB->prev_qp = currSlice->qp; |
| currMB->prev_delta_qp = 0; |
| } |
| |
| currMB->qp = currSlice->qp ; |
| |
| currMB->delta_qp = currMB->qp - currMB->prev_qp; |
| delta_qp_mbaff[currMB->mb_field][img->bot_MB] = currMB->delta_qp; |
| qp_mbaff [currMB->mb_field][img->bot_MB] = currMB->qp; |
| } |
| img->qp_scaled = img->qp + img->bitdepth_luma_qp_scale; |
| |
| set_chroma_qp (currMB); |
| |
| // loop filter parameter |
| if (active_pps->deblocking_filter_control_present_flag) |
| { |
| currMB->LFDisableIdc = img->LFDisableIdc; |
| currMB->LFAlphaC0Offset = img->LFAlphaC0Offset; |
| currMB->LFBetaOffset = img->LFBetaOffset; |
| } |
| else |
| { |
| currMB->LFDisableIdc = 0; |
| currMB->LFAlphaC0Offset = 0; |
| currMB->LFBetaOffset = 0; |
| } |
| |
| // If MB is next to a slice boundary, mark neighboring blocks unavailable for prediction |
| CheckAvailabilityOfNeighbors(); |
| |
| if (input->symbol_mode == CABAC) |
| CheckAvailabilityOfNeighborsCABAC(); |
| |
| // Reset vectors and reference indices |
| for (l=0; l<2; l++) |
| { |
| for (j=img->block_y; j < img->block_y + BLOCK_MULTIPLE; j++) |
| { |
| memset(&enc_picture->ref_idx[l][j][img->block_x], -1, BLOCK_MULTIPLE * sizeof(char)); |
| memset(enc_picture->mv [l][j][img->block_x], 0, 2 * BLOCK_MULTIPLE * sizeof(short)); |
| for (i=img->block_x; i < img->block_x + BLOCK_MULTIPLE; i++) |
| enc_picture->ref_pic_id[l][j][i]= -1; |
| } |
| } |
| |
| // Reset syntax element entries in MB struct |
| currMB->mb_type = 0; |
| currMB->cbp_blk = 0; |
| currMB->cbp = 0; |
| currMB->cbp_bits = 0; |
| currMB->c_ipred_mode = DC_PRED_8; |
| |
| memset (currMB->mvd, 0, BLOCK_CONTEXT * sizeof(int)); |
| memset (currMB->intra_pred_modes, DC_PRED, MB_BLOCK_PARTITIONS * sizeof(char)); // changing this to char would allow us to use memset |
| memset (currMB->intra_pred_modes8x8, DC_PRED, MB_BLOCK_PARTITIONS * sizeof(char)); |
| |
| //initialize the whole MB as INTRA coded |
| //Blocks are set to notINTRA in write_one_macroblock |
| if (input->UseConstrainedIntraPred) |
| { |
| img->intra_block[img->current_mb_nr] = 1; |
| } |
| |
| // Initialize bitcounters for this macroblock |
| if(prev_mb < 0) // No slice header to account for |
| { |
| currMB->bitcounter[BITS_HEADER] = 0; |
| } |
| else if (currMB->slice_nr == img->mb_data[prev_mb].slice_nr) // current MB belongs to the |
| // same slice as the last MB |
| { |
| currMB->bitcounter[BITS_HEADER] = 0; |
| } |
| |
| currMB->bitcounter[BITS_MB_MODE ] = 0; |
| currMB->bitcounter[BITS_COEFF_Y_MB ] = 0; |
| currMB->bitcounter[BITS_INTER_MB ] = 0; |
| currMB->bitcounter[BITS_CBP_MB ] = 0; |
| currMB->bitcounter[BITS_DELTA_QUANT_MB] = 0; |
| currMB->bitcounter[BITS_COEFF_UV_MB ] = 0; |
| |
| if(input->SearchMode == FAST_FULL_SEARCH) |
| ResetFastFullIntegerSearch (); |
| |
| // disable writing of trace file |
| #if TRACE |
| curr_slice->partArr[0].bitstream->trace_enabled = FALSE; |
| if (input->partition_mode) |
| { |
| curr_slice->partArr[1].bitstream->trace_enabled = FALSE; |
| curr_slice->partArr[2].bitstream->trace_enabled = FALSE; |
| } |
| #endif |
| } |
| |
| /*! |
| ************************************************************************ |
| * \brief |
| * terminates processing of the current macroblock depending |
| * on the chosen slice mode |
| ************************************************************************ |
| */ |
| void terminate_macroblock( Boolean *end_of_slice, //!< returns true for last macroblock of a slice, otherwise false |
| Boolean *recode_macroblock //!< returns true if max. slice size is exceeded an macroblock must be recoded in next slice |
| ) |
| { |
| int i; |
| Slice *currSlice = img->currentSlice; |
| Macroblock *currMB = &img->mb_data[img->current_mb_nr]; |
| SyntaxElement se; |
| int *partMap = assignSE2partition[input->partition_mode]; |
| DataPartition *dataPart; |
| Bitstream *currStream; |
| int rlc_bits=0; |
| int use_bitstream_backing = (input->slice_mode == FIXED_RATE || input->slice_mode == CALLBACK); |
| int new_slice; |
| static int skip = FALSE; |
| |
| |
| // if previous mb in the same slice group has different slice number as the current, it's the |
| // the start of new slice |
| new_slice=0; |
| if ( (img->current_mb_nr==0) || (FmoGetPreviousMBNr(img->current_mb_nr)<0) ) |
| new_slice=1; |
| else if( img->mb_data[FmoGetPreviousMBNr(img->current_mb_nr)].slice_nr != img->current_slice_nr ) |
| new_slice=1; |
| |
| *recode_macroblock=FALSE; |
| |
| switch(input->slice_mode) |
| { |
| case NO_SLICES: |
| currSlice->num_mb++; |
| *recode_macroblock = FALSE; |
| if ((currSlice->num_mb) == (int)img->PicSizeInMbs) // maximum number of MBs reached |
| *end_of_slice = TRUE; |
| |
| // if it's end of current slice group, slice ends too |
| *end_of_slice = (Boolean) (*end_of_slice | (img->current_mb_nr == FmoGetLastCodedMBOfSliceGroup (FmoMB2SliceGroup (img->current_mb_nr)))); |
| |
| break; |
| case FIXED_MB: |
| // For slice mode one, check if a new slice boundary follows |
| currSlice->num_mb++; |
| *recode_macroblock = FALSE; |
| //! Check end-of-slice group condition first |
| *end_of_slice = (Boolean) (img->current_mb_nr == FmoGetLastCodedMBOfSliceGroup (FmoMB2SliceGroup (img->current_mb_nr))); |
| //! Now check maximum # of MBs in slice |
| *end_of_slice = (Boolean) (*end_of_slice | (currSlice->num_mb >= input->slice_argument)); |
| |
| break; |
| |
| // For slice modes two and three, check if coding of this macroblock |
| // resulted in too many bits for this slice. If so, indicate slice |
| // boundary before this macroblock and code the macroblock again |
| case FIXED_RATE: |
| // in case of skip MBs check if there is a slice boundary |
| // only for UVLC (img->cod_counter is always 0 in case of CABAC) |
| if(img->cod_counter) |
| { |
| // write out the skip MBs to know how many bits we need for the RLC |
| se.value1 = img->cod_counter; |
| se.value2 = 0; |
| se.type = SE_MBTYPE; |
| dataPart = &(currSlice->partArr[partMap[se.type]]); |
| |
| TRACE_SE (se.tracestring, "mb_skip_run"); |
| writeSE_UVLC(&se, dataPart); |
| rlc_bits=se.len; |
| |
| currStream = dataPart->bitstream; |
| // save the bitstream as it would be if we write the skip MBs |
| currStream->bits_to_go_skip = currStream->bits_to_go; |
| currStream->byte_pos_skip = currStream->byte_pos; |
| currStream->byte_buf_skip = currStream->byte_buf; |
| // restore the bitstream |
| currStream->bits_to_go = currStream->stored_bits_to_go; |
| currStream->byte_pos = currStream->stored_byte_pos; |
| currStream->byte_buf = currStream->stored_byte_buf; |
| skip = TRUE; |
| } |
| //! Check if the last coded macroblock fits into the size of the slice |
| //! But only if this is not the first macroblock of this slice |
| if (!new_slice) |
| { |
| if(slice_too_big(rlc_bits)) |
| { |
| *recode_macroblock = TRUE; |
| *end_of_slice = TRUE; |
| } |
| else if(!img->cod_counter) |
| skip = FALSE; |
| } |
| // maximum number of MBs |
| |
| // check if current slice group is finished |
| if ((*recode_macroblock == FALSE) && (img->current_mb_nr == FmoGetLastCodedMBOfSliceGroup (FmoMB2SliceGroup (img->current_mb_nr)))) |
| { |
| *end_of_slice = TRUE; |
| if(!img->cod_counter) |
| skip = FALSE; |
| } |
| |
| //! (first MB OR first MB in a slice) AND bigger that maximum size of slice |
| if (new_slice && slice_too_big(rlc_bits)) |
| { |
| *end_of_slice = TRUE; |
| if(!img->cod_counter) |
| skip = FALSE; |
| } |
| if (!*recode_macroblock) |
| currSlice->num_mb++; |
| break; |
| |
| case CALLBACK: |
| if (img->current_mb_nr > 0 && !new_slice) |
| { |
| if (currSlice->slice_too_big(rlc_bits)) |
| { |
| *recode_macroblock = TRUE; |
| *end_of_slice = TRUE; |
| } |
| } |
| |
| if ( (*recode_macroblock == FALSE) && (img->current_mb_nr == FmoGetLastCodedMBOfSliceGroup (FmoMB2SliceGroup (img->current_mb_nr)))) |
| *end_of_slice = TRUE; |
| break; |
| |
| default: |
| snprintf(errortext, ET_SIZE, "Slice Mode %d not supported", input->slice_mode); |
| error(errortext, 600); |
| } |
| |
| if (*recode_macroblock == TRUE) |
| { |
| // Restore everything |
| for (i=0; i<currSlice->max_part_nr; i++) |
| { |
| dataPart = &(currSlice->partArr[i]); |
| currStream = dataPart->bitstream; |
| currStream->bits_to_go = currStream->stored_bits_to_go; |
| currStream->byte_pos = currStream->stored_byte_pos; |
| currStream->byte_buf = currStream->stored_byte_buf; |
| stats->bit_slice = stats->stored_bit_slice; |
| |
| if (input->symbol_mode == CABAC) |
| { |
| dataPart->ee_cabac = dataPart->ee_recode; |
| } |
| } |
| } |
| |
| if (input->symbol_mode == UVLC) |
| { |
| // Skip MBs at the end of this slice |
| dataPart = &(currSlice->partArr[partMap[SE_MBTYPE]]); |
| if(*end_of_slice == TRUE && skip == TRUE) |
| { |
| // only for Slice Mode 2 or 3 |
| // If we still have to write the skip, let's do it! |
| if(img->cod_counter && *recode_macroblock == TRUE) // MB that did not fit in this slice |
| { |
| // If recoding is true and we have had skip, |
| // we have to reduce the counter in case of recoding |
| img->cod_counter--; |
| if(img->cod_counter) |
| { |
| se.value1 = img->cod_counter; |
| se.value2 = 0; |
| se.type = SE_MBTYPE; |
| #if TRACE |
| snprintf(se.tracestring, TRACESTRING_SIZE, "Final MB runlength = %3d",img->cod_counter); |
| #endif |
| writeSE_UVLC(&se, dataPart); |
| rlc_bits=se.len; |
| currMB->bitcounter[BITS_MB_MODE]+=rlc_bits; |
| img->cod_counter = 0; |
| } |
| } |
| else //! MB that did not fit in this slice anymore is not a Skip MB |
| { |
| currStream = dataPart->bitstream; |
| // update the bitstream |
| currStream->bits_to_go = currStream->bits_to_go_skip; |
| currStream->byte_pos = currStream->byte_pos_skip; |
| currStream->byte_buf = currStream->byte_buf_skip; |
| |
| // update the statistics |
| img->cod_counter = 0; |
| skip = FALSE; |
| } |
| } |
| |
| // Skip MBs at the end of this slice for Slice Mode 0 or 1 |
| if(*end_of_slice == TRUE && img->cod_counter && !use_bitstream_backing) |
| { |
| se.value1 = img->cod_counter; |
| se.value2 = 0; |
| se.type = SE_MBTYPE; |
| |
| TRACE_SE (se.tracestring, "mb_skip_run"); |
| writeSE_UVLC(&se, dataPart); |
| |
| rlc_bits=se.len; |
| currMB->bitcounter[BITS_MB_MODE]+=rlc_bits; |
| img->cod_counter = 0; |
| } |
| } |
| } |
| |
| /*! |
| ***************************************************************************** |
| * |
| * \brief |
| * For Slice Mode 2: Checks if one partition of one slice exceeds the |
| * allowed size |
| * |
| * \return |
| * FALSE if all Partitions of this slice are smaller than the allowed size |
| * TRUE is at least one Partition exceeds the limit |
| * |
| * \par Side effects |
| * none |
| * |
| * \date |
| * 4 November 2001 |
| * |
| * \author |
| * Tobias Oelbaum drehvial@gmx.net |
| *****************************************************************************/ |
| |
| int slice_too_big(int rlc_bits) |
| { |
| Slice *currSlice = img->currentSlice; |
| DataPartition *dataPart; |
| Bitstream *currStream; |
| EncodingEnvironmentPtr eep; |
| int i; |
| int size_in_bytes; |
| |
| //! UVLC |
| if (input->symbol_mode == UVLC) |
| { |
| for (i=0; i<currSlice->max_part_nr; i++) |
| { |
| dataPart = &(currSlice->partArr[i]); |
| currStream = dataPart->bitstream; |
| size_in_bytes = currStream->byte_pos /*- currStream->tmp_byte_pos*/; |
| |
| if (currStream->bits_to_go < 8) |
| size_in_bytes++; |
| if (currStream->bits_to_go < rlc_bits) |
| size_in_bytes++; |
| if(size_in_bytes > input->slice_argument) |
| return TRUE; |
| } |
| } |
| |
| //! CABAC |
| if (input->symbol_mode ==CABAC) |
| { |
| for (i=0; i<currSlice->max_part_nr; i++) |
| { |
| dataPart= &(currSlice->partArr[i]); |
| eep = &(dataPart->ee_cabac); |
| |
| if( arienco_bits_written(eep) > (input->slice_argument*8)) |
| return TRUE; |
| } |
| } |
| return FALSE; |
| } |
| |
| /*! |
| ************************************************************************ |
| * \brief |
| * Predict one component of a 4x4 Luma block |
| ************************************************************************ |
| */ |
| void OneComponentLumaPrediction4x4 ( imgpel* mpred, //!< array of prediction values (row by row) |
| int pic_pix_x, //!< absolute horizontal coordinate of 4x4 block |
| int pic_pix_y, //!< absolute vertical coordinate of 4x4 block |
| short* mv, //!< motion vector |
| short ref, //!< reference frame |
| StorablePicture **list //!< reference picture list |
| ) |
| { |
| int j; |
| imgpel *ref_line; |
| |
| width_pad = list[ref]->size_x_pad; |
| height_pad = list[ref]->size_y_pad; |
| |
| ref_line = UMVLine4X (list[ref]->imgY_sub, pic_pix_y + mv[1], pic_pix_x + mv[0]); |
| |
| for (j = 0; j < BLOCK_SIZE; j++) |
| { |
| memcpy(mpred, ref_line, BLOCK_SIZE * sizeof(imgpel)); |
| ref_line += img_padded_size_x; |
| mpred += BLOCK_SIZE; |
| } |
| } |
| |
| |
| /*! |
| ************************************************************************ |
| * \brief |
| * Predict one 4x4 Luma block |
| ************************************************************************ |
| */ |
| void LumaPrediction4x4 ( int block_x, //!< relative horizontal block coordinate of 4x4 block |
| int block_y, //!< relative vertical block coordinate of 4x4 block |
| int p_dir, //!< prediction direction (0=list0, 1=list1, 2=bipred) |
| int l0_mode, //!< list0 prediction mode (1-7, 0=DIRECT if l1_mode=0) |
| int l1_mode, //!< list1 prediction mode (1-7, 0=DIRECT if l0_mode=0) |
| short l0_ref_idx, //!< reference frame for list0 prediction (-1: Intra4x4 pred. with l0_mode) |
| short l1_ref_idx //!< reference frame for list1 prediction |
| ) |
| { |
| static imgpel l0_pred[16]; |
| static imgpel l1_pred[16]; |
| |
| int i, j; |
| int block_x4 = block_x+4; |
| int block_y4 = block_y+4; |
| int pic_opix_x = ((img->opix_x + block_x) << 2) + IMG_PAD_SIZE_TIMES4; |
| int pic_opix_y = ((img->opix_y + block_y) << 2) + IMG_PAD_SIZE_TIMES4; |
| int bx = block_x >> 2; |
| int by = block_y >> 2; |
| imgpel* l0pred = l0_pred; |
| imgpel* l1pred = l1_pred; |
| Macroblock* currMB = &img->mb_data[img->current_mb_nr]; |
| |
| int apply_weights = ( (active_pps->weighted_pred_flag && (img->type== P_SLICE || img->type == SP_SLICE)) || |
| (active_pps->weighted_bipred_idc && (img->type== B_SLICE))); |
| short**** mv_array = img->all_mv[by][bx]; |
| |
| |
| if (currMB->bi_pred_me && l0_ref_idx == 0 && l1_ref_idx == 0 && p_dir == 2 && l0_mode==1 && l1_mode==1) |
| { |
| mv_array = currMB->bi_pred_me == 1? img->bipred_mv1[by][bx] : img->bipred_mv2[by][bx]; |
| } |
| |
| switch (p_dir) |
| { |
| case 0: |
| OneComponentLumaPrediction4x4 (l0_pred, pic_opix_x, pic_opix_y, mv_array[LIST_0][l0_ref_idx][l0_mode], l0_ref_idx, listX[0+currMB->list_offset]); |
| break; |
| case 1: |
| OneComponentLumaPrediction4x4 (l1_pred, pic_opix_x, pic_opix_y, mv_array[LIST_1][l1_ref_idx][l1_mode], l1_ref_idx, listX[1+currMB->list_offset]); |
| break; |
| case 2: |
| OneComponentLumaPrediction4x4 (l0_pred, pic_opix_x, pic_opix_y, mv_array[LIST_0][l0_ref_idx][l0_mode], l0_ref_idx, listX[0+currMB->list_offset]); |
| OneComponentLumaPrediction4x4 (l1_pred, pic_opix_x, pic_opix_y, mv_array[LIST_1][l1_ref_idx][l1_mode], l1_ref_idx, listX[1+currMB->list_offset]); |
| break; |
| default: |
| break; |
| } |
| |
| if (apply_weights) |
| { |
| |
| if (p_dir==2) |
| { |
| int wbp0 = wbp_weight[0][l0_ref_idx][l1_ref_idx][0]; |
| int wbp1 = wbp_weight[1][l0_ref_idx][l1_ref_idx][0]; |
| int offset = (wp_offset[0][l0_ref_idx][0] + wp_offset[1][l1_ref_idx][0] + 1)>>1; |
| int wp_round = 2*wp_luma_round; |
| int weight_denom = luma_log_weight_denom + 1; |
| for (j=block_y; j<block_y4; j++) |
| for (i=block_x; i<block_x4; i++) |
| img->mpr[j][i] = iClip1( img->max_imgpel_value, |
| ((wbp0 * *l0pred++ + wbp1 * *l1pred++ + wp_round) >> (weight_denom)) + offset); |
| } |
| else if (p_dir==0) |
| { |
| int wp = wp_weight[0][l0_ref_idx][0]; |
| int offset = wp_offset[0][l0_ref_idx][0]; |
| for (j=block_y; j<block_y4; j++) |
| for (i=block_x; i<block_x4; i++) |
| img->mpr[j][i] = iClip1( img->max_imgpel_value, |
| ((wp * *l0pred++ + wp_luma_round) >> luma_log_weight_denom) + offset); |
| } |
| else // p_dir==1 |
| { |
| int wp = wp_weight[1][l1_ref_idx][0]; |
| int offset = wp_offset[1][l1_ref_idx][0]; |
| for (j=block_y; j<block_y4; j++) |
| for (i=block_x; i<block_x4; i++) |
| img->mpr[j][i] = iClip1( img->max_imgpel_value, |
| ((wp * *l1pred++ + wp_luma_round) >> luma_log_weight_denom) + offset ); |
| } |
| } |
| else |
| { |
| if (p_dir==2) |
| { |
| for (j=block_y; j<block_y4; j++) |
| for (i=block_x; i<block_x4; i++) |
| img->mpr[j][i] = (*l0pred++ + *l1pred++ + 1) >> 1; |
| } |
| else if (p_dir==0) |
| { |
| for (j=block_y; j<block_y4; j++) |
| { |
| memcpy(&(img->mpr[j][block_x]), l0pred, BLOCK_SIZE * sizeof(imgpel)); |
| l0pred += BLOCK_SIZE; |
| } |
| } |
| else // p_dir==1 |
| { |
| for (j=block_y; j<block_y4; j++) |
| { |
| memcpy(&(img->mpr[j][block_x]), l1pred, BLOCK_SIZE * sizeof(imgpel)); |
| l1pred += BLOCK_SIZE; |
| } |
| } |
| } |
| } |
| |
| /*! |
| ************************************************************************ |
| * \brief |
| * Predict one 4x4 Luma block |
| ************************************************************************ |
| */ |
| void LumaPrediction4x4Bi ( int block_x, //!< relative horizontal block coordinate of 4x4 block |
| int block_y, //!< relative vertical block coordinate of 4x4 block |
| int l0_mode, //!< list0 prediction mode (1-7, 0=DIRECT if l1_mode=0) |
| int l1_mode, //!< list1 prediction mode (1-7, 0=DIRECT if l0_mode=0) |
| short l0_ref_idx, //!< reference frame for list0 prediction (-1: Intra4x4 pred. with l0_mode) |
| short l1_ref_idx, //!< reference frame for list1 prediction |
| int list //!< current list for prediction. |
| ) |
| { |
| static imgpel l0_pred[16]; |
| static imgpel l1_pred[16]; |
| |
| int i, j; |
| int block_x4 = block_x+4; |
| int block_y4 = block_y+4; |
| int pic_opix_x = ((img->opix_x + block_x) << 2) + IMG_PAD_SIZE_TIMES4; |
| int pic_opix_y = ((img->opix_y + block_y) << 2) + IMG_PAD_SIZE_TIMES4; |
| int bx = block_x >> 2; |
| int by = block_y >> 2; |
| imgpel* l0pred = l0_pred; |
| imgpel* l1pred = l1_pred; |
| Macroblock* currMB = &img->mb_data[img->current_mb_nr]; |
| |
| int apply_weights = ( (active_pps->weighted_pred_flag && (img->type == P_SLICE || img->type == SP_SLICE)) || |
| (active_pps->weighted_bipred_idc && (img->type == B_SLICE))); |
| short ****mv_array = list ? img->bipred_mv1[by][bx] : img->bipred_mv2[by][bx]; |
| |
| OneComponentLumaPrediction4x4 (l0_pred, pic_opix_x, pic_opix_y, mv_array[LIST_0][l0_ref_idx][l0_mode], l0_ref_idx, listX[0+currMB->list_offset]); |
| OneComponentLumaPrediction4x4 (l1_pred, pic_opix_x, pic_opix_y, mv_array[LIST_1][l1_ref_idx][l1_mode], l1_ref_idx, listX[1+currMB->list_offset]); |
| |
| if (apply_weights) |
| { |
| int wbp0 = wbp_weight[0][l0_ref_idx][l1_ref_idx][0]; |
| int wbp1 = wbp_weight[1][l0_ref_idx][l1_ref_idx][0]; |
| int offset = (wp_offset[0][l0_ref_idx][0] + wp_offset[1][l1_ref_idx][0] + 1)>>1; |
| for (j=block_y; j<block_y4; j++) |
| for (i=block_x; i<block_x4; i++) |
| img->mpr[j][i] = iClip1( img->max_imgpel_value, |
| ((wbp0 * *l0pred++ + wbp1 * *l1pred++ + 2*wp_luma_round) >> (luma_log_weight_denom + 1)) + offset); |
| } |
| else |
| { |
| for (j=block_y; j<block_y4; j++) |
| for (i=block_x; i<block_x4; i++) |
| img->mpr[j][i] = (*l0pred++ + *l1pred++ + 1) >> 1; |
| } |
| } |
| |
| |
| /*! |
| ************************************************************************ |
| * \brief |
| * Residual Coding of an 8x8 Luma block (not for intra) |
| * |
| * \return |
| * coefficient cost |
| ************************************************************************ |
| */ |
| int LumaResidualCoding8x8 ( int *cbp, //!< Output: cbp (updated according to processed 8x8 luminance block) |
| int64 *cbp_blk, //!< Output: block cbp (updated according to processed 8x8 luminance block) |
| int block8x8, //!< block number of 8x8 block |
| short p_dir, //!< prediction direction |
| int l0_mode, //!< list0 prediction mode (1-7, 0=DIRECT) |
| int l1_mode, //!< list1 prediction mode (1-7, 0=DIRECT) |
| short l0_ref_idx, //!< reference picture for list0 prediction |
| short l1_ref_idx //!< reference picture for list0 prediction |
| ) |
| { |
| int block_y, block_x, pic_pix_y, pic_pix_x, i, j, nonzero = 0, cbp_blk_mask; |
| int coeff_cost = 0; |
| int mb_y = (block8x8 >> 1) << 3; |
| int mb_x = (block8x8 & 0x01) << 3; |
| int pix_y; |
| int cbp_mask = 1 << block8x8; |
| int bxx, byy; // indexing curr_blk |
| int skipped = (l0_mode == 0 && l1_mode == 0 && (img->type != B_SLICE)); |
| Macroblock* currMB = &img->mb_data[img->current_mb_nr]; |
| //set transform size |
| int need_8x8_transform = currMB->luma_transform_size_8x8_flag; |
| |
| if ( input->ChromaMCBuffer ) |
| OneComponentChromaPrediction4x4 = OneComponentChromaPrediction4x4_retrieve; |
| else |
| OneComponentChromaPrediction4x4 = OneComponentChromaPrediction4x4_regenerate; |
| |
| //===== loop over 4x4 blocks ===== |
| if(!need_8x8_transform) |
| { |
| for (byy=0, block_y=mb_y; block_y<mb_y+8; byy+=4, block_y+=4) |
| { |
| pic_pix_y = img->opix_y + block_y; |
| |
| for (bxx=0, block_x=mb_x; block_x<mb_x+8; bxx+=4, block_x+=4) |
| { |
| pic_pix_x = img->opix_x + block_x; |
| |
| cbp_blk_mask = (block_x>>2) + block_y; |
| |
| //===== prediction of 4x4 block ===== |
| LumaPrediction4x4 (block_x, block_y, p_dir, l0_mode, l1_mode, l0_ref_idx, l1_ref_idx); |
| |
| //===== get displaced frame difference ====== |
| for (j=0; j<4; j++) |
| { |
| pix_y = pic_pix_y + j; |
| for (i=0; i<4; i++) |
| { |
| img->m7[j][i] = imgY_org[pix_y][pic_pix_x + i] - img->mpr[j+block_y][i+block_x]; |
| } |
| } |
| |
| //===== DCT, Quantization, inverse Quantization, IDCT, Reconstruction ===== |
| if ( (img->NoResidueDirect != 1 && !skipped ) || |
| ((img->qp_scaled)==0 && img->lossless_qpprime_flag==1) ) |
| { |
| //===== DCT, Quantization, inverse Quantization, IDCT, Reconstruction ===== |
| if (img->type!=SP_SLICE) |
| nonzero = dct_luma (block_x, block_y, &coeff_cost, 0); |
| else if(!si_frame_indicator && !sp2_frame_indicator) |
| nonzero = dct_luma_sp(block_x, block_y, &coeff_cost);// SP frame encoding |
| else |
| nonzero = dct_luma_sp2(block_x, block_y, &coeff_cost);//switching SP/SI encoding |
| |
| if (nonzero) |
| { |
| (*cbp_blk) |= (int64)1 << cbp_blk_mask; // one bit for every 4x4 block |
| (*cbp) |= cbp_mask; // one bit for the 4x4 blocks of an 8x8 block |
| } |
| } |
| } |
| } |
| } |
| else |
| { |
| for (byy=0, block_y=mb_y; block_y<mb_y+8; byy+=4, block_y+=4) |
| { |
| pic_pix_y = img->opix_y + block_y; |
| |
| for (bxx=0, block_x=mb_x; block_x<mb_x+8; bxx+=4, block_x+=4) |
| { |
| pic_pix_x = img->opix_x + block_x; |
| |
| cbp_blk_mask = (block_x>>2) + block_y; |
| |
| //===== prediction of 4x4 block ===== |
| LumaPrediction4x4 (block_x, block_y, p_dir, l0_mode, l1_mode, l0_ref_idx, l1_ref_idx); |
| |
| //===== get displaced frame difference ====== |
| for (j=0; j<4; j++) |
| { |
| pix_y = pic_pix_y + j; |
| for (i=0; i<4; i++) |
| { |
| img->m7[j+byy][i+bxx] = imgY_org[pix_y][pic_pix_x+i] - img->mpr[j+block_y][i+block_x]; |
| } |
| } |
| } |
| } |
| if (img->NoResidueDirect != 1 && !skipped) |
| { |
| if (img->type!=SP_SLICE) |
| nonzero = dct_luma8x8 (block8x8, &coeff_cost, 0); |
| |
| if (nonzero) |
| { |
| (*cbp_blk) |= 51 << (4*block8x8-2*(block8x8 & 0x01)); // corresponds to 110011, as if all four 4x4 blocks contain coeff, shifted to block position |
| (*cbp) |= cbp_mask; // one bit for the 4x4 blocks of an 8x8 block |
| } |
| } |
| } |
| |
| /* |
| The purpose of the action below is to prevent that single or 'expensive' coefficients are coded. |
| With 4x4 transform there is larger chance that a single coefficient in a 8x8 or 16x16 block may be nonzero. |
| A single small (level=1) coefficient in a 8x8 block will cost: 3 or more bits for the coefficient, |
| 4 bits for EOBs for the 4x4 blocks,possibly also more bits for CBP. Hence the total 'cost' of that single |
| coefficient will typically be 10-12 bits which in a RD consideration is too much to justify the distortion improvement. |
| The action below is to watch such 'single' coefficients and set the reconstructed block equal to the prediction according |
| to a given criterium. The action is taken only for inter luma blocks. |
| |
| Notice that this is a pure encoder issue and hence does not have any implication on the standard. |
| coeff_cost is a parameter set in dct_luma() and accumulated for each 8x8 block. If level=1 for a coefficient, |
| coeff_cost is increased by a number depending on RUN for that coefficient.The numbers are (see also dct_luma()): 3,2,2,1,1,1,0,0,... |
| when RUN equals 0,1,2,3,4,5,6, etc. |
| If level >1 coeff_cost is increased by 9 (or any number above 3). The threshold is set to 3. This means for example: |
| 1: If there is one coefficient with (RUN,level)=(0,1) in a 8x8 block this coefficient is discarded. |
| 2: If there are two coefficients with (RUN,level)=(1,1) and (4,1) the coefficients are also discarded |
| sum_cnt_nonz is the accumulation of coeff_cost over a whole macro block. If sum_cnt_nonz is 5 or less for the whole MB, |
| all nonzero coefficients are discarded for the MB and the reconstructed block is set equal to the prediction. |
| */ |
| |
| if (img->NoResidueDirect != 1 && !skipped && coeff_cost <= _LUMA_COEFF_COST_ && |
| ((img->qp_scaled)!=0 || img->lossless_qpprime_flag==0)&& |
| !(img->type==SP_SLICE && (si_frame_indicator==1 || sp2_frame_indicator==1 )))// last set of conditions |
| // cannot skip when perfect reconstruction is as in switching pictures or SI pictures |
| { |
| coeff_cost = 0; |
| (*cbp) &= (63 - cbp_mask); |
| (*cbp_blk) &= ~(51 << (4*block8x8-2*(block8x8 & 0x01))); |
| |
| for (j=mb_y; j<mb_y+8; j++) |
| memcpy(&enc_picture->imgY[img->pix_y + j][img->pix_x + mb_x], &img->mpr[j][mb_x], 2 * BLOCK_SIZE * sizeof(imgpel)); |
| |
| if (img->type==SP_SLICE) |
| { |
| for (i=mb_x; i < mb_x+BLOCK_SIZE*2; i+=BLOCK_SIZE) |
| for (j=mb_y; j < mb_y+BLOCK_SIZE*2; j+=BLOCK_SIZE) |
| copyblock_sp(i,j); |
| } |
| } |
| |
| return coeff_cost; |
| } |
| |
| |
| /*! |
| ************************************************************************ |
| * \brief |
| * Set mode parameters and reference frames for an 8x8 block |
| ************************************************************************ |
| */ |
| void SetModesAndRefframe (int b8, short* p_dir, int* l0_mode, int* l1_mode, short* fw_ref, short* bw_ref) |
| { |
| Macroblock* currMB = &img->mb_data[img->current_mb_nr]; |
| int j = 2*(b8>>1); |
| int i = 2*(b8 & 0x01); |
| |
| *l0_mode = *l1_mode = *fw_ref = *bw_ref = -1; |
| |
| *p_dir = currMB->b8pdir[b8]; |
| |
| if (img->type!=B_SLICE) |
| { |
| *fw_ref = enc_picture->ref_idx[LIST_0][img->block_y+j][img->block_x+i]; |
| *bw_ref = 0; |
| *l0_mode = currMB->b8mode[b8]; |
| *l1_mode = 0; |
| } |
| else |
| { |
| if (currMB->b8pdir[b8]==-1) |
| { |
| *fw_ref = -1; |
| *bw_ref = -1; |
| *l0_mode = 0; |
| *l1_mode = 0; |
| } |
| else if (currMB->b8pdir[b8]==0) |
| { |
| *fw_ref = enc_picture->ref_idx[LIST_0][img->block_y+j][img->block_x+i]; |
| *bw_ref = 0; |
| *l0_mode = currMB->b8mode[b8]; |
| *l1_mode = 0; |
| } |
| else if (currMB->b8pdir[b8]==1) |
| { |
| *fw_ref = 0; |
| *bw_ref = enc_picture->ref_idx[LIST_1][img->block_y+j][img->block_x+i]; |
| *l0_mode = 0; |
| *l1_mode = currMB->b8mode[b8]; |
| } |
| else |
| { |
| *fw_ref = enc_picture->ref_idx[LIST_0][img->block_y+j][img->block_x+i]; |
| *bw_ref = enc_picture->ref_idx[LIST_1][img->block_y+j][img->block_x+i]; |
| *l0_mode = currMB->b8mode[b8]; |
| *l1_mode = currMB->b8mode[b8]; |
| } |
| } |
| } |
| |
| |
| /*! |
| ************************************************************************ |
| * \brief |
| * Residual Coding of a Luma macroblock (not for intra) |
| ************************************************************************ |
| */ |
| void LumaResidualCoding (void) |
| { |
| int i,j,block8x8,b8_x,b8_y; |
| int l0_mode, l1_mode; |
| short p_dir, refframe; |
| int sum_cnt_nonz; |
| Macroblock *currMB = &img->mb_data[img->current_mb_nr]; |
| |
| currMB->cbp = 0 ; |
| currMB->cbp_blk = 0 ; |
| sum_cnt_nonz = 0 ; |
| |
| for (block8x8=0; block8x8<4; block8x8++) |
| { |
| short bw_ref; |
| SetModesAndRefframe (block8x8, &p_dir, &l0_mode, &l1_mode, &refframe, &bw_ref); |
| |
| sum_cnt_nonz += LumaResidualCoding8x8 (&(currMB->cbp), &(currMB->cbp_blk), block8x8, |
| p_dir, l0_mode, l1_mode, refframe, bw_ref); |
| } |
| |
| if (sum_cnt_nonz <= _LUMA_MB_COEFF_COST_ && |
| ((img->qp_scaled)!=0 || img->lossless_qpprime_flag==0) && |
| !(img->type==SP_SLICE && (si_frame_indicator==1 || sp2_frame_indicator==1)))// modif ES added last set of conditions |
| //cannot skip if SI or switching SP frame perfect reconstruction is needed |
| { |
| currMB->cbp &= 0xfffff0 ; |
| currMB->cbp_blk &= 0xff0000 ; |
| for (j=0; j < MB_BLOCK_SIZE; j++) |
| memcpy(&enc_picture->imgY[img->pix_y+j][img->pix_x], img->mpr[j], MB_BLOCK_SIZE * sizeof (imgpel)); |
| |
| if (img->type==SP_SLICE) |
| { |
| for(block8x8=0;block8x8<4;block8x8++) |
| { |
| b8_x=(block8x8&1)<<3; |
| b8_y=(block8x8&2)<<2; |
| for (i=b8_x;i<b8_x+8;i+=4) |
| for (j=b8_y;j<b8_y+8;j+=4) |
| copyblock_sp(i,j); |
| } |
| } |
| } |
| } |
| |
| |
| /*! |
| ************************************************************************ |
| * \brief |
| * Makes the decision if 8x8 tranform will be used (for RD-off) |
| ************************************************************************ |
| */ |
| int TransformDecision (int block_check, int *cost) |
| { |
| int block_y, block_x, pic_pix_y, pic_pix_x, i, j, k; |
| int mb_y, mb_x, block8x8; |
| int l0_mode, l1_mode; |
| short p_dir, fw_ref, bw_ref; |
| int num_blks; |
| int cost8x8=0, cost4x4=0; |
| int *diff_ptr; |
| |
| if(block_check==-1) |
| { |
| block8x8=0; |
| num_blks=4; |
| } |
| else |
| { |
| block8x8=block_check; |
| num_blks=block_check+1; |
| } |
| |
| for (; block8x8<num_blks; block8x8++) |
| { |
| SetModesAndRefframe (block8x8, &p_dir, &l0_mode, &l1_mode, &fw_ref, &bw_ref); |
| |
| mb_y = (block8x8 >> 1) << 3; |
| mb_x = (block8x8 & 0x01) << 3; |
| //===== loop over 4x4 blocks ===== |
| k=0; |
| for (block_y=mb_y; block_y<mb_y+8; block_y+=4) |
| { |
| pic_pix_y = img->opix_y + block_y; |
| |
| for (block_x=mb_x; block_x<mb_x+8; block_x+=4) |
| { |
| pic_pix_x = img->opix_x + block_x; |
| |
| //===== prediction of 4x4 block ===== |
| LumaPrediction4x4 (block_x, block_y, p_dir, l0_mode, l1_mode, fw_ref, bw_ref); |
| |
| //===== get displaced frame difference ====== |
| diff_ptr=&diff64[k]; |
| for (j=0; j<4; j++) |
| { |
| for (i=0; i<4; i++, k++) |
| diff64[k] = imgY_org[pic_pix_y+j][pic_pix_x+i] - img->mpr[j+block_y][i+block_x]; |
| } |
| cost4x4 += distortion4x4 (diff_ptr); |
| } |
| } |
| cost8x8 += distortion8x8 (diff64); |
| } |
| |
| if(input->Transform8x8Mode==2) //always allow 8x8 transform |
| return 1; |
| else if(cost8x8<cost4x4) |
| return 1; |
| else |
| { |
| *cost = (*cost-cost8x8+cost4x4); |
| return 0; |
| } |
| } |
| |
| /*! |
| ************************************************************************ |
| * \brief |
| * Predict (on-the-fly) one component of a chroma 4x4 block |
| ************************************************************************ |
| */ |
| void OneComponentChromaPrediction4x4_regenerate ( |
| imgpel* mpred, //!< array to store prediction values |
| int block_c_x, //!< horizontal pixel coordinate of 4x4 block |
| int block_c_y, //!< vertical pixel coordinate of 4x4 block |
| short****** mv, //!< motion vector array |
| int list_idx, //!< reference picture list |
| short ref, //!< reference index |
| int blocktype, //!< block type |
| int uv) //!< chroma component |
| { |
| int i, j, ii, jj, ii0, jj0, ii1, jj1, if0, if1, jf0, jf1; |
| short* mvb; |
| |
| int f1_x = 64/img->mb_cr_size_x; |
| int f2_x=f1_x-1; |
| |
| int f1_y = 64/img->mb_cr_size_y; |
| int f2_y=f1_y-1; |
| |
| int f3=f1_x*f1_y, f4=f3>>1; |
| int list_offset = img->mb_data[img->current_mb_nr].list_offset; |
| int max_y_cr = (int) (list_offset ? (img->height_cr >> 1) - 1 : img->height_cr - 1); |
| int max_x_cr = (int) (img->width_cr - 1); |
| int jjx, iix; |
| int mb_cr_y_div4 = img->mb_cr_size_y>>2; |
| int mb_cr_x_div4 = img->mb_cr_size_x>>2; |
| int jpos; |
| |
| StorablePicture **list = listX[list_idx + list_offset]; |
| |
| imgpel** refimage = list[ref]->imgUV[uv]; |
| |
| for (j=block_c_y; j < block_c_y + BLOCK_SIZE; j++) |
| { |
| jjx = j/mb_cr_y_div4; |
| jpos = (j + img->opix_c_y)*f1_y; |
| |
| for (i=block_c_x; i < block_c_x + BLOCK_SIZE; i++) |
| { |
| iix = i/mb_cr_x_div4; |
| mvb = mv [jjx][iix][list_idx][ref][blocktype]; |
| |
| ii = (i + img->opix_c_x)*f1_x + mvb[0]; |
| jj = jpos + mvb[1]; |
| |
| if (active_sps->chroma_format_idc == 1) |
| jj += list[ref]->chroma_vector_adjustment; |
| |
| ii0 = iClip3 (0, max_x_cr, ii/f1_x); |
| jj0 = iClip3 (0, max_y_cr, jj/f1_y); |
| ii1 = iClip3 (0, max_x_cr, (ii+f2_x)/f1_x); |
| jj1 = iClip3 (0, max_y_cr, (jj+f2_y)/f1_y); |
| |
| if1 = (ii&f2_x); if0 = f1_x-if1; |
| jf1 = (jj&f2_y); jf0 = f1_y-jf1; |
| |
| *mpred++ = (if0 * jf0 * refimage[jj0][ii0] + |
| if1 * jf0 * refimage[jj0][ii1] + |
| if0 * jf1 * refimage[jj1][ii0] + |
| if1 * jf1 * refimage[jj1][ii1] + f4) / f3; |
| } |
| } |
| } |
| |
| /*! |
| ************************************************************************ |
| * \brief |
| * Retrieve one component of a chroma 4x4 block from the buffer |
| ************************************************************************ |
| */ |
| void OneComponentChromaPrediction4x4_retrieve (imgpel* mpred, //!< array to store prediction values |
| int block_c_x, //!< horizontal pixel coordinate of 4x4 block |
| int block_c_y, //!< vertical pixel coordinate of 4x4 block |
| short****** mv, //!< motion vector array |
| int list_idx, //!< reference picture list |
| short ref, //!< reference index |
| int blocktype, //!< block type |
| int uv) //!< chroma component |
| { |
| int j, ii, jj; |
| short* mvb; |
| |
| int list_offset = img->mb_data[img->current_mb_nr].list_offset; |
| |
| int jjx; |
| int right_shift_x = 4 - chroma_shift_x; |
| int right_shift_y = 4 - chroma_shift_y; |
| int jpos; |
| |
| int pos_x1 = block_c_x >> right_shift_x; |
| int pos_x2 = (block_c_x + 2) >> right_shift_x; |
| int ipos1 = ((block_c_x + img->opix_c_x) << chroma_shift_x) + IMG_PAD_SIZE_TIMES4; |
| int ipos2 = ((block_c_x + 2 + img->opix_c_x) << chroma_shift_x) + IMG_PAD_SIZE_TIMES4; |
| |
| |
| StorablePicture **list = listX[list_idx + list_offset]; |
| |
| imgpel**** refsubimage = list[ref]->imgUV_sub[uv]; |
| imgpel *line_ptr; |
| |
| int jj_chroma = ((active_sps->chroma_format_idc == 1) ? list[ref]->chroma_vector_adjustment : 0) + IMG_PAD_SIZE_TIMES4; |
| |
| width_pad_cr = list[ref]->size_x_cr_pad; |
| height_pad_cr = list[ref]->size_y_cr_pad; |
| |
| |
| for (j=block_c_y; j < block_c_y + BLOCK_SIZE; j++) |
| { |
| jjx = j >> right_shift_y; // translate into absolute block (luma) coordinates |
| |
| jpos = ( (j + img->opix_c_y) << chroma_shift_y ) + jj_chroma; |
| |
| mvb = mv [jjx][pos_x1][list_idx][ref][blocktype]; |
| |
| ii = ipos1 + mvb[0]; |
| jj = jpos + mvb[1]; |
| |
| line_ptr = UMVLine8X_chroma ( refsubimage, jj, ii); |
| *mpred++ = *line_ptr++; |
| *mpred++ = *line_ptr; |
| |
| mvb = mv [jjx][pos_x2][list_idx][ref][blocktype]; |
| |
| ii = ipos2 + mvb[0]; |
| jj = jpos + mvb[1]; |
| |
| line_ptr = UMVLine8X_chroma ( refsubimage, jj, ii); |
| *mpred++ = *line_ptr++; |
| *mpred++ = *line_ptr; |
| } |
| } |
| |
| /*! |
| ************************************************************************ |
| * \brief |
| * Predict an intra chroma 4x4 block |
| ************************************************************************ |
| */ |
| void IntraChromaPrediction4x4 (int uv, // <-- colour component |
| int block_x, // <-- relative horizontal block coordinate of 4x4 block |
| int block_y) // <-- relative vertical block coordinate of 4x4 block |
| { |
| int mode = img->mb_data[img->current_mb_nr].c_ipred_mode; |
| int j; |
| |
| //===== prediction ===== |
| for (j=block_y; j<block_y+4; j++) |
| memcpy(&img->mpr[j][block_x],&img->mprr_c[uv][mode][j][block_x], BLOCK_MULTIPLE * sizeof(imgpel)); |
| } |
| |
| |
| |
| /*! |
| ************************************************************************ |
| * \brief |
| * Predict one chroma 4x4 block |
| ************************************************************************ |
| */ |
| void ChromaPrediction4x4 ( int uv, // <-- colour component |
| int block_x, // <-- relative horizontal block coordinate of 4x4 block |
| int block_y, // <-- relative vertical block coordinate of 4x4 block |
| int p_dir, // <-- prediction direction |
| int l0_mode, // <-- list0 prediction mode (1-7, 0=DIRECT if l1_mode=0) |
| int l1_mode, // <-- list1 prediction mode (1-7, 0=DIRECT if l0_mode=0) |
| short l0_ref_idx, // <-- reference frame for list0 prediction (if (<0) -> intra prediction) |
| short l1_ref_idx) // <-- reference frame for list1 prediction |
| { |
| static imgpel l0_pred[MB_BLOCK_SIZE]; |
| static imgpel l1_pred[MB_BLOCK_SIZE]; |
| |
| int i, j; |
| int block_x4 = block_x+4; |
| int block_y4 = block_y+4; |
| imgpel* l0pred = l0_pred; |
| imgpel* l1pred = l1_pred; |
| short****** mv_array = img->all_mv; |
| |
| Macroblock* currMB = &img->mb_data[img->current_mb_nr]; |
| |
| int apply_weights = ( (active_pps->weighted_pred_flag && (img->type == P_SLICE || img->type == SP_SLICE)) || |
| (active_pps->weighted_bipred_idc && (img->type == B_SLICE))); |
| |
| if (currMB->bi_pred_me && l0_ref_idx == 0 && l1_ref_idx == 0 && p_dir == 2 && l0_mode==1 && l1_mode==1) |
| mv_array = currMB->bi_pred_me == 1? img->bipred_mv1 : img->bipred_mv2 ; |
| |
| //===== INTRA PREDICTION ===== |
| if (p_dir==-1) |
| { |
| IntraChromaPrediction4x4 (uv, block_x, block_y); |
| return; |
| } |
| |
| //===== INTER PREDICTION ===== |
| if ((p_dir==0) || (p_dir==2)) |
| { |
| (*OneComponentChromaPrediction4x4) (l0_pred, block_x, block_y, mv_array, LIST_0, l0_ref_idx, l0_mode, uv); |
| } |
| if ((p_dir==1) || (p_dir==2)) |
| { |
| (*OneComponentChromaPrediction4x4) (l1_pred, block_x, block_y, mv_array, LIST_1, l1_ref_idx, l1_mode, uv); |
| } |
| |
| if (apply_weights) |
| { |
| if (p_dir==2) |
| { |
| int wbp0 = wbp_weight[0][l0_ref_idx][l1_ref_idx][uv+1]; |
| int wbp1 = wbp_weight[1][l0_ref_idx][l1_ref_idx][uv+1]; |
| int offset = (wp_offset[0][l0_ref_idx][uv+1] + wp_offset[1][l1_ref_idx][uv+1] + 1)>>1; |
| int wp_round = 2*wp_chroma_round; |
| int weight_denom = luma_log_weight_denom + 1; |
| |
| |
| for (j=block_y; j<block_y4; j++) |
| for (i=block_x; i<block_x4; i++) |
| img->mpr[j][i] = iClip1( img->max_imgpel_value_uv, |
| ((wbp0 * *l0pred++ + wbp1 * *l1pred++ + wp_round) >> (weight_denom)) + (offset) ); |
| } |
| else if (p_dir==0) |
| { |
| int wp = wp_weight[0][l0_ref_idx][uv+1]; |
| int offset = wp_offset[0][l0_ref_idx][uv+1]; |
| for (j=block_y; j<block_y4; j++) |
| for (i=block_x; i<block_x4; i++) |
| img->mpr[j][i] = iClip1( img->max_imgpel_value_uv, (( wp * *l0pred++ + wp_chroma_round) >> chroma_log_weight_denom) + offset); |
| } |
| else // (p_dir==1) |
| { |
| int wp = wp_weight[1][l1_ref_idx][uv+1]; |
| int offset = wp_offset[1][l1_ref_idx][uv+1]; |
| |
| for (j=block_y; j<block_y4; j++) |
| for (i=block_x; i<block_x4; i++) |
| img->mpr[j][i] = iClip1( img->max_imgpel_value_uv, ((wp * *l1pred++ + wp_chroma_round) >> chroma_log_weight_denom) + offset); |
| } |
| } |
| else |
| { |
| if (p_dir==2) |
| { |
| for (j=block_y; j<block_y4; j++) |
| for (i=block_x; i<block_x4; i++) |
| img->mpr[j][i] = (*l0pred++ + *l1pred++ + 1) >> 1; |
| } |
| else if (p_dir==0) |
| { |
| for (j=block_y; j<block_y4; j++) |
| { |
| memcpy(&(img->mpr[j][block_x]), l0pred, BLOCK_SIZE * sizeof(imgpel)); |
| l0pred += BLOCK_SIZE; |
| } |
| } |
| else // (p_dir==1) |
| { |
| for (j=block_y; j<block_y4; j++) |
| { |
| memcpy(&(img->mpr[j][block_x]), l1pred, BLOCK_SIZE * sizeof(imgpel)); |
| l1pred += BLOCK_SIZE; |
| } |
| } |
| } |
| } |
| |
| |
| /*! |
| ************************************************************************ |
| * \brief |
| * Chroma residual coding for an macroblock |
| ************************************************************************ |
| */ |
| void ChromaResidualCoding (int* cr_cbp) |
| { |
| static const int block8x8_idx[3][4][4] = //ADD-VG-15052004 |
| { |
| { {0, 1, 0, 0}, |
| {2, 3, 0, 0}, |
| {0, 0, 0, 0}, |
| {0, 0, 0, 0}, |
| }, |
| { {0, 1, 0, 0}, |
| {0, 1, 0, 0}, |
| {2, 3, 0, 0}, |
| {2, 3, 0, 0}, |
| }, |
| { {0, 0, 1, 1}, |
| {0, 0, 1, 1}, |
| {2, 2, 3, 3}, |
| {2, 2, 3, 3} |
| } |
| }; |
| int uv, block8, block_y, block_x, j, i; |
| int l0_mode, l1_mode; |
| short p_dir, refframe, bw_ref; |
| int skipped = (img->mb_data[img->current_mb_nr].mb_type == 0 && (img->type == P_SLICE || img->type == SP_SLICE)); |
| int yuv = img->yuv_format - 1; //ADD-VG-15052004 |
| |
| if ( input->ChromaMCBuffer ) |
| OneComponentChromaPrediction4x4 = OneComponentChromaPrediction4x4_retrieve; |
| else |
| OneComponentChromaPrediction4x4 = OneComponentChromaPrediction4x4_regenerate; |
| |
| for (*cr_cbp=0, uv=0; uv<2; uv++) |
| { |
| //===== prediction of chrominance blocks ===d== |
| block8 = 0; |
| for (block_y=0; block_y < img->mb_cr_size_y; block_y+=4) |
| for (block_x=0; block_x < img->mb_cr_size_x; block_x+=4) |
| { |
| block8 = block8x8_idx[yuv][block_y>>2][block_x>>2]; |
| SetModesAndRefframe (block8, &p_dir, &l0_mode, &l1_mode, &refframe, &bw_ref); |
| |
| ChromaPrediction4x4 (uv, block_x, block_y, p_dir, l0_mode, l1_mode, refframe, bw_ref); |
| } |
| |
| // ==== set chroma residue to zero for skip Mode in SP frames |
| if (img->NoResidueDirect) |
| { |
| for (j=0; j<img->mb_cr_size_y; j++) |
| memcpy(&enc_picture->imgUV[uv][img->pix_c_y+j][img->pix_c_x], img->mpr[j], img->mb_cr_size_x * sizeof(imgpel)); |
| } |
| else if (skipped && img->type==SP_SLICE) |
| { |
| for (j=0; j<8; j++) |
| memset(img->m7[j], 0 , 8 * sizeof(int)); |
| } |
| else |
| if (skipped) |
| { |
| for (j=0; j<img->mb_cr_size_y; j++) |
| memcpy(&enc_picture->imgUV[uv][img->pix_c_y+j][img->pix_c_x], img->mpr[j], img->mb_cr_size_x * sizeof(imgpel)); |
| } |
| else |
| { |
| for (j=0; j<img->mb_cr_size_y; j++) |
| for (i=0; i<img->mb_cr_size_x; i++) |
| { |
| img->m7[j][i] = imgUV_org[uv][img->opix_c_y+j][img->opix_c_x+i] - img->mpr[j][i]; |
| } |
| } |
| |
| //===== DCT, Quantization, inverse Quantization, IDCT, and Reconstruction ===== |
| //===== Call function for skip mode in SP frames to properly process frame ==== |
| |
| if (skipped && img->type==SP_SLICE) |
| { |
| if(si_frame_indicator || sp2_frame_indicator) |
| *cr_cbp=dct_chroma_sp2(uv,*cr_cbp);//modif ES added, calls the SI/switching SP encoding function |
| else |
| *cr_cbp=dct_chroma_sp(uv,*cr_cbp); |
| } |
| else |
| { |
| if (!img->NoResidueDirect && !skipped) |
| { |
| if (img->type!=SP_SLICE || (img->mb_data[img->current_mb_nr].mb_type==I16MB )) |
| { |
| //even if the block is intra it should still be treated as SP |
| *cr_cbp=dct_chroma (uv,*cr_cbp); |
| } |
| else |
| { |
| if(si_frame_indicator||sp2_frame_indicator) |
| *cr_cbp=dct_chroma_sp2(uv,*cr_cbp);// SI frames or switching SP frames |
| else |
| *cr_cbp=dct_chroma_sp(uv,*cr_cbp); |
| } |
| } |
| } |
| } |
| |
| //===== update currMB->cbp ===== |
| img->mb_data[img->current_mb_nr].cbp += ((*cr_cbp)<<4); |
| |
| } |
| |
| |
| /*! |
| ************************************************************************ |
| * \brief |
| * Intra prediction of the chrminance layers of one macroblock |
| ************************************************************************ |
| */ |
| void IntraChromaPrediction (int *mb_up, int *mb_left, int*mb_up_left) |
| { |
| |
| Macroblock *currMB = &img->mb_data[img->current_mb_nr]; |
| int s, s0, s1, s2, s3, i, j, k; |
| imgpel** image; |
| int block_x, block_y; |
| int mb_nr = img->current_mb_nr; |
| int mb_available_up; |
| int mb_available_left[2]; |
| int mb_available_up_left; |
| int ih,iv; |
| int ib,ic,iaa; |
| int uv; |
| imgpel hline[16], vline[16]; |
| int mode; |
| int best_mode = DC_PRED_8; //just an initilaization here, should always be overwritten |
| int cost; |
| int min_cost; |
| PixelPos up; //!< pixel position p(0,-1) |
| PixelPos left[17]; //!< pixel positions p(-1, -1..15) |
| int cr_MB_x = img->mb_cr_size_x; |
| int cr_MB_y = img->mb_cr_size_y; |
| |
| int blk_x; |
| int blk_y; |
| int b8,b4; |
| int yuv = img->yuv_format - 1; |
| |
| static const 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}} |
| }; |
| |
| 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); |
| |
| |
| mb_available_up = up.available; |
| mb_available_up_left = left[0].available; |
| mb_available_left[0] = mb_available_left[1] = left[1].available; |
| |
| if(input->UseConstrainedIntraPred) |
| { |
| mb_available_up = up.available ? img->intra_block[up.mb_addr] : 0; |
| for (i=0, mb_available_left[0]=1; i<(cr_MB_y>>1);i++) |
| mb_available_left[0] &= left[i+1].available ? img->intra_block[left[i+1].mb_addr]: 0; |
| for (i=(cr_MB_y>>1), mb_available_left[1]=1; i<cr_MB_y;i++) |
| mb_available_left[1] &= left[i+1].available ? img->intra_block[left[i+1].mb_addr]: 0; |
| mb_available_up_left = left[0].available ? img->intra_block[left[0].mb_addr]: 0; |
| } |
| |
| if (mb_up) |
| *mb_up = mb_available_up; |
| if (mb_left) |
| *mb_left = mb_available_left[0] && mb_available_left[1]; |
| if (mb_up_left) |
| *mb_up_left = mb_available_up_left; |
| |
| |
| // compute all chroma intra prediction modes for both U and V |
| for (uv=0; uv<2; uv++) |
| { |
| image = enc_picture->imgUV[uv]; |
| |
| // DC prediction |
| for(b8=0; b8<img->num_blk8x8_uv >> 1;b8++) |
| { |
| for (b4=0; b4<4; b4++) |
| { |
| block_y = subblk_offset_y[yuv][b8][b4]; |
| block_x = subblk_offset_x[yuv][b8][b4]; |
| blk_x = block_x; |
| blk_y = block_y + 1; |
| |
| s=img->dc_pred_value_chroma; |
| s0=s1=s2=s3=0; |
| |
| //===== get prediction value ===== |
| switch (block_pos[yuv][b8][b4]) |
| { |
| case 0: //===== TOP LEFT ===== |
| if (mb_available_up) for (i=blk_x;i<(blk_x+4);i++) s0 += image[up.pos_y][up.pos_x + i]; |
| if (mb_available_left[0]) for (i=blk_y;i<(blk_y+4);i++) s2 += image[left[i].pos_y][left[i].pos_x]; |
| if (mb_available_up && mb_available_left[0]) s = (s0+s2+4) >> 3; |
| else if (mb_available_up) s = (s0 +2) >> 2; |
| else if (mb_available_left[0]) s = (s2 +2) >> 2; |
| break; |
| case 1: //===== TOP RIGHT ===== |
| if (mb_available_up) for (i=blk_x;i<(blk_x+4);i++) s1 += image[up.pos_y][up.pos_x + i]; |
| else if (mb_available_left[0]) for (i=blk_y;i<(blk_y+4);i++) s2 += image[left[i].pos_y][left[i].pos_x]; |
| if (mb_available_up) s = (s1 +2) >> 2; |
| else if (mb_available_left[0]) s = (s2 +2) >> 2; |
| break; |
| case 2: //===== BOTTOM LEFT ===== |
| if (mb_available_left[1]) for (i=blk_y;i<(blk_y+4);i++) s3 += image[left[i].pos_y][left[i].pos_x]; |
| else if (mb_available_up) for (i=blk_x;i<(blk_x+4);i++) s0 += image[up.pos_y][up.pos_x + i]; |
| if (mb_available_left[1]) s = (s3 +2) >> 2; |
| else if (mb_available_up) s = (s0 +2) >> 2; |
| break; |
| case 3: //===== BOTTOM RIGHT ===== |
| if (mb_available_up) for (i=blk_x;i<(blk_x+4);i++) s1 += image[up.pos_y][up.pos_x + i]; |
| if (mb_available_left[1]) for (i=blk_y;i<(blk_y+4);i++) s3 += image[left[i].pos_y][left[i].pos_x]; |
| if (mb_available_up && mb_available_left[1]) s = (s1+s3+4) >> 3; |
| else if (mb_available_up) s = (s1 +2) >> 2; |
| else if (mb_available_left[1]) s = (s3 +2) >> 2; |
| break; |
| } |
| |
| //===== prediction ===== |
| for (j=block_y; j<block_y+4; j++) |
| for (i=block_x; i<block_x+4; i++) |
| { |
| img->mprr_c[uv][DC_PRED_8][j][i] = s; |
| } |
| } |
| } |
| |
| // vertical prediction |
| if (mb_available_up) |
| { |
| memcpy(hline,&image[up.pos_y][up.pos_x], cr_MB_x * sizeof(imgpel)); |
| for (j=0; j<cr_MB_y; j++) |
| memcpy(img->mprr_c[uv][VERT_PRED_8][j], hline, cr_MB_x * sizeof(imgpel)); |
| } |
| |
| // horizontal prediction |
| if (mb_available_left[0] && mb_available_left[1]) |
| { |
| for (i=0; i<cr_MB_y; i++) |
| vline[i] = image[left[i+1].pos_y][left[i+1].pos_x]; |
| for (i=0; i<cr_MB_x; i++) |
| for (j=0; j<cr_MB_y; j++) |
| img->mprr_c[uv][HOR_PRED_8][j][i] = vline[j]; |
| } |
| |
| // plane prediction |
| if (mb_available_left[0] && mb_available_left[1] && mb_available_up && mb_available_up_left) |
| { |
| ih = (cr_MB_x>>1)*(hline[cr_MB_x-1] - image[left[0].pos_y][left[0].pos_x]); |
| for (i=0;i<(cr_MB_x>>1)-1;i++) |
| ih += (i+1)*(hline[(cr_MB_x>>1)+i] - hline[(cr_MB_x>>1)-2-i]); |
| |
| iv = (cr_MB_y>>1)*(vline[cr_MB_y-1] - image[left[0].pos_y][left[0].pos_x]); |
| for (i=0;i<(cr_MB_y>>1)-1;i++) |
| iv += (i+1)*(vline[(cr_MB_y>>1)+i] - vline[(cr_MB_y>>1)-2-i]); |
| |
| 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*(hline[cr_MB_x-1]+vline[cr_MB_y-1]); |
| for (j=0; j<cr_MB_y; j++) |
| for (i=0; i<cr_MB_x; i++) |
| img->mprr_c[uv][PLANE_8][j][i]= iClip3(0, img->max_imgpel_value_uv, |
| (iaa+(i-(cr_MB_x>>1)+1)*ib+(j-(cr_MB_y>>1)+1)*ic+16)>>5); |
| } |
| } |
| |
| if (!input->rdopt) // the rd-opt part does not work correctly (see encode_one_macroblock) |
| { // since ipredmodes could be overwritten => encoder-decoder-mismatches |
| // pick lowest cost prediction mode |
| min_cost = INT_MAX; |
| for (i=0;i<cr_MB_y;i++) |
| { |
| getNeighbour(mb_nr, 0 , i, IS_CHROMA, &left[i]); |
| } |
| for (mode=DC_PRED_8; mode<=PLANE_8; mode++) |
| { |
| if ((img->type != I_SLICE || !input->IntraDisableInterOnly) && input->ChromaIntraDisable == 1 && mode!=DC_PRED_8) |
| continue; |
| |
| if ((mode==VERT_PRED_8 && !mb_available_up) || |
| (mode==HOR_PRED_8 && (!mb_available_left[0] || !mb_available_left[1])) || |
| (mode==PLANE_8 && (!mb_available_left[0] || !mb_available_left[1] || !mb_available_up || !mb_available_up_left))) |
| continue; |
| |
| cost = 0; |
| for (uv=0; uv<2; uv++) |
| { |
| image = imgUV_org[uv]; |
| for (block_y=0; block_y<cr_MB_y; block_y+=4) |
| for (block_x=0; block_x<cr_MB_x; block_x+=4) |
| { |
| for (k=0,j=block_y; j<block_y+4; j++) |
| { |
| for (i=block_x; i<block_x+4; i++,k++) |
| diff[k] = image[left[j].pos_y][left[j].pos_x+i] - img->mprr_c[uv][mode][j][i]; |
| } |
| cost += distortion4x4(diff); |
| } |
| } |
| if (cost < min_cost) |
| { |
| best_mode = mode; |
| min_cost = cost; |
| } |
| } |
| currMB->c_ipred_mode = best_mode; |
| } |
| } |
| |
| /*! |
| ************************************************************************************** |
| * \brief |
| * RD Decision for Intra prediction mode of the chrominance layers of one macroblock |
| ************************************************************************************** |
| */ |
| void IntraChromaRDDecision (RD_PARAMS enc_mb) |
| { |
| Macroblock *currMB = &img->mb_data[img->current_mb_nr]; |
| int i, j, k; |
| imgpel** image; |
| int block_x, block_y; |
| int mb_nr = img->current_mb_nr; |
| int mb_available_up; |
| int mb_available_left[2]; |
| int mb_available_up_left; |
| int uv; |
| int mode; |
| int best_mode = DC_PRED_8; //just an initialization here, should always be overwritten |
| int cost; |
| int min_cost; |
| PixelPos up; //!< pixel position p(0,-1) |
| PixelPos left[17]; //!< pixel positions p(-1, -1..15) |
| 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); |
| |
| mb_available_up = up.available; |
| mb_available_up_left = left[0].available; |
| mb_available_left[0] = mb_available_left[1] = left[1].available; |
| |
| if(input->UseConstrainedIntraPred) |
| { |
| mb_available_up = up.available ? img->intra_block[up.mb_addr] : 0; |
| for (i=0, mb_available_left[0]=1; i<(cr_MB_y>>1);i++) |
| mb_available_left[0] &= left[i+1].available ? img->intra_block[left[i+1].mb_addr]: 0; |
| for (i=(cr_MB_y>>1), mb_available_left[1]=1; i<cr_MB_y;i++) |
| mb_available_left[1] &= left[i+1].available ? img->intra_block[left[i+1].mb_addr]: 0; |
| mb_available_up_left = left[0].available ? img->intra_block[left[0].mb_addr]: 0; |
| } |
| |
| // pick lowest cost prediction mode |
| min_cost = INT_MAX; |
| for (i=0;i<cr_MB_y;i++) |
| { |
| getNeighbour(mb_nr, 0 , i, IS_CHROMA, &left[i]); |
| } |
| if ( img->MbaffFrameFlag && img->field_mode ) |
| { |
| for (i=0;i<cr_MB_y;i++) |
| { |
| left[i].pos_y = left[i].pos_y >> 1; |
| } |
| } |
| |
| for (mode=DC_PRED_8; mode<=PLANE_8; mode++) |
| { |
| if ((mode==VERT_PRED_8 && !mb_available_up) || |
| (mode==HOR_PRED_8 && (!mb_available_left[0] || !mb_available_left[1])) || |
| (mode==PLANE_8 && (!mb_available_left[0] || !mb_available_left[1] || !mb_available_up || !mb_available_up_left))) |
| continue; |
| |
| cost = 0; |
| for (uv=0; uv<2; uv++) |
| { |
| image = imgUV_org[uv]; |
| for (block_y=0; block_y<cr_MB_y; block_y+=4) |
| { |
| for (block_x=0; block_x<cr_MB_x; block_x+=4) |
| { |
| for (k=0,j=block_y; j<block_y+4; j++) |
| { |
| for (i=block_x; i<block_x+4; i++,k++) |
| diff[k] = image[left[j].pos_y][left[j].pos_x+i] - img->mprr_c[uv][mode][j][i]; |
| } |
| cost += distortion4x4(diff); |
| } |
| if (cost > min_cost) break; |
| } |
| if (cost > min_cost) break; |
| } |
| |
| cost += (int) (enc_mb.lambda_me[Q_PEL] * mvbits[ mode ]); // exp golomb coding cost for mode signaling |
| |
| if (cost < min_cost) |
| { |
| best_mode = mode; |
| min_cost = cost; |
| } |
| } |
| currMB->c_ipred_mode = best_mode; |
| } |
| |
| |
| /*! |
| ************************************************************************ |
| * \brief |
| * Check if all reference frames for a macroblock are zero |
| ************************************************************************ |
| */ |
| int ZeroRef (Macroblock* currMB) |
| { |
| int i,j; |
| |
| for (j=img->block_y; j<img->block_y + BLOCK_MULTIPLE; j++) |
| for (i=img->block_x; i<img->block_x + BLOCK_MULTIPLE; i++) |
| { |
| if (enc_picture->ref_idx[LIST_0][j][i]!=0) |
| return 0; |
| } |
| return 1; |
| } |
| |
| |
| /*! |
| ************************************************************************ |
| * \brief |
| * Converts macroblock type to coding value |
| ************************************************************************ |
| */ |
| int MBType2Value (Macroblock* currMB) |
| { |
| static const int dir1offset[3] = { 1, 2, 3}; |
| static const int dir2offset[3][3] = {{ 0, 4, 8}, // 1. block forward |
| { 6, 2, 10}, // 1. block backward |
| {12, 14, 16}}; // 1. block bi-directional |
| |
| int mbtype, pdir0, pdir1; |
| |
| if (img->type!=B_SLICE) |
| { |
| if (currMB->mb_type==I8MB ||currMB->mb_type==I4MB) |
| return (img->type==I_SLICE ? 0 : 6); |
| else if (currMB->mb_type==I16MB) return (img->type==I_SLICE ? 0 : 6) + img->i16offset; |
| else if (currMB->mb_type==IPCM) return (img->type==I_SLICE ? 25 : 31); |
| else if (currMB->mb_type==P8x8) |
| { |
| if (input->symbol_mode==UVLC |
| && ZeroRef (currMB)) return 5; |
| else return 4; |
| } |
| else return currMB->mb_type; |
| } |
| else |
| { |
| mbtype = currMB->mb_type; |
| pdir0 = currMB->b8pdir[0]; |
| pdir1 = currMB->b8pdir[3]; |
| |
| if (mbtype==0) return 0; |
| else if (mbtype==I4MB || mbtype==I8MB) |
| return 23; |
| else if (mbtype==I16MB) return 23 + img->i16offset; |
| else if (mbtype==IPCM) return 48; |
| else if (mbtype==P8x8) return 22; |
| else if (mbtype==1) return dir1offset[pdir0]; |
| else if (mbtype==2) return 4 + dir2offset[pdir0][pdir1]; |
| else return 5 + dir2offset[pdir0][pdir1]; |
| } |
| } |
| |
| |
| /*! |
| ************************************************************************ |
| * \brief |
| * Writes 4x4 intra prediction modes for a macroblock |
| ************************************************************************ |
| */ |
| int writeIntra4x4Modes(void) |
| { |
| int i; |
| Macroblock *currMB = &img->mb_data[img->current_mb_nr]; |
| SyntaxElement se; |
| int *bitCount = currMB->bitcounter; |
| Slice *currSlice = img->currentSlice; |
| const int *partMap = assignSE2partition[input->partition_mode]; |
| DataPartition *dataPart = &(currSlice->partArr[partMap[SE_INTRAPREDMODE]]); |
| |
| int rate = 0; |
| |
| currMB->IntraChromaPredModeFlag = 1; |
| |
| for(i=0;i<16;i++) |
| { |
| se.context = i; |
| se.value1 = currMB->intra_pred_modes[i]; |
| se.value2 = 0; |
| |
| #if TRACE |
| if (se.value1 < 0 ) |
| snprintf(se.tracestring, TRACESTRING_SIZE, "Intra 4x4 mode = predicted (context: %d)",se.context); |
| else |
| snprintf(se.tracestring, TRACESTRING_SIZE, "Intra 4x4 mode = %3d (context: %d)",se.value1,se.context); |
| #endif |
| |
| // set symbol type and function pointers |
| se.type = SE_INTRAPREDMODE; |
| |
| // encode and update rate |
| writeIntraPredMode (&se, dataPart); |
| |
| bitCount[BITS_COEFF_Y_MB]+=se.len; |
| rate += se.len; |
| } |
| |
| return rate; |
| } |
| |
| /*! |
| ************************************************************************ |
| * \brief |
| * Writes 8x8 intra prediction modes for a macroblock |
| ************************************************************************ |
| */ |
| int writeIntra8x8Modes(void) |
| { |
| int block8x8; |
| Macroblock *currMB = &img->mb_data[img->current_mb_nr]; |
| SyntaxElement se; |
| int *bitCount = currMB->bitcounter; |
| Slice *currSlice = img->currentSlice; |
| const int *partMap = assignSE2partition[input->partition_mode]; |
| DataPartition *dataPart = &(currSlice->partArr[partMap[SE_INTRAPREDMODE]]); |
| |
| int rate = 0; |
| |
| currMB->IntraChromaPredModeFlag = 1; |
| |
| for(block8x8=0;block8x8<4;block8x8++) |
| { |
| |
| se.context = block8x8<<2; |
| se.value1 = currMB->intra_pred_modes8x8[(block8x8<<2)]; |
| se.value2 = 0; |
| |
| #if TRACE |
| if (se.value1 < 0 ) |
| snprintf(se.tracestring, TRACESTRING_SIZE, "Intra 8x8 mode = predicted (context: %d)",se.context); |
| else |
| snprintf(se.tracestring, TRACESTRING_SIZE, "Intra 8x8 mode = %3d (context: %d)",se.value1,se.context); |
| #endif |
| |
| // set symbol type and function pointers |
| se.type = SE_INTRAPREDMODE; |
| |
| // encode and update rate |
| writeIntraPredMode (&se, dataPart); |
| |
| bitCount[BITS_COEFF_Y_MB]+=se.len; |
| rate += se.len; |
| } |
| |
| return rate; |
| } |
| |
| int writeIntraModes(void) |
| { |
| switch (img->mb_data[img->current_mb_nr].mb_type) |
| { |
| case I4MB: |
| return writeIntra4x4Modes(); |
| break; |
| case I8MB: |
| return writeIntra8x8Modes(); |
| break; |
| default: |
| return 0; |
| break; |
| } |
| } |
| |
| /*! |
| ************************************************************************ |
| * \brief |
| * Converts 8x8 block type to coding value |
| ************************************************************************ |
| */ |
| int B8Mode2Value (int b8mode, int b8pdir) |
| { |
| static const int b8start[8] = {0,0,0,0, 1, 4, 5, 10}; |
| static const int b8inc [8] = {0,0,0,0, 1, 2, 2, 1}; |
| |
| if (img->type!=B_SLICE) |
| { |
| return (b8mode-4); |
| } |
| else |
| { |
| return b8start[b8mode] + b8inc[b8mode] * b8pdir; |
| } |
| } |
| |
| /*! |
| ************************************************************************ |
| * \brief |
| * Codes macroblock header |
| * \param rdopt |
| * true for calls during RD-optimization |
| * \param coeff_rate |
| * bitrate of Luma and Chroma coeff |
| ************************************************************************ |
| */ |
| int writeMBLayer (int rdopt, int *coeff_rate) |
| { |
| int i,j; |
| int mb_nr = img->current_mb_nr; |
| int prev_mb_nr = FmoGetPreviousMBNr(img->current_mb_nr); |
| Macroblock* currMB = &img->mb_data[mb_nr]; |
| Macroblock* prevMB = mb_nr ? (&img->mb_data[prev_mb_nr]) : NULL; |
| SyntaxElement se; |
| int* bitCount = currMB->bitcounter; |
| Slice* currSlice = img->currentSlice; |
| DataPartition* dataPart; |
| const int* partMap = assignSE2partition[input->partition_mode]; |
| int no_bits = 0; |
| int skip = currMB->mb_type ? 0:((img->type == B_SLICE) ? !currMB->cbp:1); |
| int mb_type; |
| int prevMbSkipped = 0; |
| int mb_field_tmp; |
| Macroblock *topMB = NULL; |
| |
| int WriteFrameFieldMBInHeader = 0; |
| |
| if (img->MbaffFrameFlag) |
| { |
| if (0==(mb_nr & 0x01)) |
| { |
| WriteFrameFieldMBInHeader = 1; // top field |
| |
| prevMbSkipped = 0; |
| } |
| else |
| { |
| if (prevMB->mb_type ? 0:((img->type == B_SLICE) ? !prevMB->cbp:1)) |
| { |
| WriteFrameFieldMBInHeader = 1; // bottom, if top was skipped |
|
