void ff_h263_encode_mb(MpegEncContext * s, int16_t block[6][64], int motion_x, int motion_y) { int cbpc, cbpy, i, cbp, pred_x, pred_y; int16_t pred_dc; int16_t rec_intradc[6]; int16_t *dc_ptr[6]; const int interleaved_stats= (s->flags&CODEC_FLAG_PASS1); if (!s->mb_intra) { /* compute cbp */ cbp= get_p_cbp(s, block, motion_x, motion_y); if ((cbp | motion_x | motion_y | s->dquant | (s->mv_type - MV_TYPE_16X16)) == 0) { /* skip macroblock */ put_bits(&s->pb, 1, 1); if(interleaved_stats){ s->misc_bits++; s->last_bits++; } s->skip_count++; return; } put_bits(&s->pb, 1, 0); /* mb coded */ cbpc = cbp & 3; cbpy = cbp >> 2; if(s->alt_inter_vlc==0 || cbpc!=3) cbpy ^= 0xF; if(s->dquant) cbpc+= 8; if(s->mv_type==MV_TYPE_16X16){ put_bits(&s->pb, ff_h263_inter_MCBPC_bits[cbpc], ff_h263_inter_MCBPC_code[cbpc]); put_bits(&s->pb, ff_h263_cbpy_tab[cbpy][1], ff_h263_cbpy_tab[cbpy][0]); if(s->dquant) put_bits(&s->pb, 2, dquant_code[s->dquant+2]); if(interleaved_stats){ s->misc_bits+= get_bits_diff(s); } /* motion vectors: 16x16 mode */ ff_h263_pred_motion(s, 0, 0, &pred_x, &pred_y); if (!s->umvplus) { ff_h263_encode_motion_vector(s, motion_x - pred_x, motion_y - pred_y, 1); } else { h263p_encode_umotion(s, motion_x - pred_x); h263p_encode_umotion(s, motion_y - pred_y); if (((motion_x - pred_x) == 1) && ((motion_y - pred_y) == 1)) /* To prevent Start Code emulation */ put_bits(&s->pb,1,1); } }else{ put_bits(&s->pb, ff_h263_inter_MCBPC_bits[cbpc+16], ff_h263_inter_MCBPC_code[cbpc+16]); put_bits(&s->pb, ff_h263_cbpy_tab[cbpy][1], ff_h263_cbpy_tab[cbpy][0]); if(s->dquant) put_bits(&s->pb, 2, dquant_code[s->dquant+2]); if(interleaved_stats){ s->misc_bits+= get_bits_diff(s); } for(i=0; i<4; i++){ /* motion vectors: 8x8 mode*/ ff_h263_pred_motion(s, i, 0, &pred_x, &pred_y); motion_x = s->current_picture.motion_val[0][s->block_index[i]][0]; motion_y = s->current_picture.motion_val[0][s->block_index[i]][1]; if (!s->umvplus) { ff_h263_encode_motion_vector(s, motion_x - pred_x, motion_y - pred_y, 1); } else { h263p_encode_umotion(s, motion_x - pred_x); h263p_encode_umotion(s, motion_y - pred_y); if (((motion_x - pred_x) == 1) && ((motion_y - pred_y) == 1)) /* To prevent Start Code emulation */ put_bits(&s->pb,1,1); } } } if(interleaved_stats){ s->mv_bits+= get_bits_diff(s); } } else { assert(s->mb_intra); cbp = 0; if (s->h263_aic) { /* Predict DC */ for(i=0; i<6; i++) { int16_t level = block[i][0]; int scale; if(i<4) scale= s->y_dc_scale; else scale= s->c_dc_scale; pred_dc = ff_h263_pred_dc(s, i, &dc_ptr[i]); level -= pred_dc; /* Quant */ if (level >= 0) level = (level + (scale>>1))/scale; else level = (level - (scale>>1))/scale; /* AIC can change CBP */ if (level == 0 && s->block_last_index[i] == 0) s->block_last_index[i] = -1; if(!s->modified_quant){ if (level < -127) level = -127; else if (level > 127) level = 127; } block[i][0] = level; /* Reconstruction */ rec_intradc[i] = scale*level + pred_dc; /* Oddify */ rec_intradc[i] |= 1; //if ((rec_intradc[i] % 2) == 0) // rec_intradc[i]++; /* Clipping */ if (rec_intradc[i] < 0) rec_intradc[i] = 0; else if (rec_intradc[i] > 2047) rec_intradc[i] = 2047; /* Update AC/DC tables */ *dc_ptr[i] = rec_intradc[i]; if (s->block_last_index[i] >= 0) cbp |= 1 << (5 - i); } }else{ for(i=0; i<6; i++) { /* compute cbp */ if (s->block_last_index[i] >= 1) cbp |= 1 << (5 - i); } } cbpc = cbp & 3; if (s->pict_type == AV_PICTURE_TYPE_I) { if(s->dquant) cbpc+=4; put_bits(&s->pb, ff_h263_intra_MCBPC_bits[cbpc], ff_h263_intra_MCBPC_code[cbpc]); } else { if(s->dquant) cbpc+=8; put_bits(&s->pb, 1, 0); /* mb coded */ put_bits(&s->pb, ff_h263_inter_MCBPC_bits[cbpc + 4], ff_h263_inter_MCBPC_code[cbpc + 4]); } if (s->h263_aic) { /* XXX: currently, we do not try to use ac prediction */ put_bits(&s->pb, 1, 0); /* no AC prediction */ } cbpy = cbp >> 2; put_bits(&s->pb, ff_h263_cbpy_tab[cbpy][1], ff_h263_cbpy_tab[cbpy][0]); if(s->dquant) put_bits(&s->pb, 2, dquant_code[s->dquant+2]); if(interleaved_stats){ s->misc_bits+= get_bits_diff(s); } } for(i=0; i<6; i++) { /* encode each block */ h263_encode_block(s, block[i], i); /* Update INTRADC for decoding */ if (s->h263_aic && s->mb_intra) { block[i][0] = rec_intradc[i]; } } if(interleaved_stats){ if (!s->mb_intra) { s->p_tex_bits+= get_bits_diff(s); s->f_count++; }else{ s->i_tex_bits+= get_bits_diff(s); s->i_count++; } } }