/****************************************************************************** * * Copyright (C) 2015 The Android Open Source Project * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at: * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. * ***************************************************************************** * Originally developed and contributed by Ittiam Systems Pvt. Ltd, Bangalore */ /** ******************************************************************************* * @file * impeg2d_mc.c * * @brief * Contains MC function definitions for MPEG2 decoder * * @author * Harish * * @par List of Functions: * - impeg2d_motion_comp() * - impeg2d_motion_comp_recon_buf() * - impeg2d_mc_1mv() * - impeg2d_mc_fw_or_bk_mb() * - impeg2d_mc_frm_dual_prime() * - impeg2d_mc_fld_dual_prime() * - impeg2d_mc_4mv() * - impeg2d_mc_2mv() * - impeg2d_dec_intra_mb() * - impeg2d_dec_skip_p_mb() * - impeg2d_dec_skip_b_mb() * - impeg2d_dec_skip_mbs() * - impeg2d_dec_0mv_coded_mb() * - impeg2d_mc_halfx_halfy() * - impeg2d_mc_halfx_fully() * - impeg2d_mc_fullx_halfy() * - impeg2d_mc_fullx_fully() * - impeg2d_set_mc_params() * * @remarks * None * ******************************************************************************* */ #include #include "iv_datatypedef.h" #include "iv.h" #include "impeg2_buf_mgr.h" #include "impeg2_disp_mgr.h" #include "impeg2_defs.h" #include "impeg2_platform_macros.h" #include "impeg2_inter_pred.h" #include "impeg2_idct.h" #include "impeg2_globals.h" #include "impeg2_mem_func.h" #include "impeg2_format_conv.h" #include "impeg2_macros.h" #include "ivd.h" #include "impeg2d.h" #include "impeg2d_bitstream.h" #include "impeg2d_structs.h" #include "impeg2d_globals.h" #include "impeg2d_pic_proc.h" #include "impeg2d_debug.h" #include "impeg2d_mv_dec.h" #include "impeg2d_mc.h" /*****************************************************************************/ /* */ /* Function Name : impeg2d_motion_comp */ /* */ /* Description : Perform motion compensation and store the resulting block*/ /* in the buf */ /* */ /* Inputs : params - Parameters required to do motion compensation */ /* */ /* Globals : */ /* */ /* Processing : Calls appropriate functions depending on the mode of */ /* compensation */ /* */ /* Outputs : buf - Buffer for the motion compensation result */ /* */ /* Returns : None */ /* */ /* Issues : None */ /* */ /* Revision History: */ /* */ /* DD MM YYYY Author(s) Changes */ /* 14 09 2005 Hairsh M First Version */ /* */ /*****************************************************************************/ void impeg2d_motion_comp(dec_state_t *ps_dec, mb_mc_params_t *ps_params,yuv_buf_t *ps_buf) { PROFILE_DISABLE_MC_RETURN; /* Perform motion compensation for Y */ ps_dec->pf_mc[ps_params->s_luma.u4_mode]((void *)ps_dec, ps_params->s_ref.pu1_y + ps_params->s_luma.u4_src_offset, ps_params->s_luma.u4_src_wd, ps_buf->pu1_y + ps_params->s_luma.u4_dst_offset_res_buf, ps_params->s_luma.u4_dst_wd_res_buf, ps_params->s_luma.u4_cols, ps_params->s_luma.u4_rows); /* Perform motion compensation for U */ ps_dec->pf_mc[ps_params->s_chroma.u4_mode]((void *)ps_dec, ps_params->s_ref.pu1_u + ps_params->s_chroma.u4_src_offset, ps_params->s_chroma.u4_src_wd, ps_buf->pu1_u + ps_params->s_chroma.u4_dst_offset_res_buf, ps_params->s_chroma.u4_dst_wd_res_buf, ps_params->s_chroma.u4_cols, ps_params->s_chroma.u4_rows); /* Perform motion compensation for V */ ps_dec->pf_mc[ps_params->s_chroma.u4_mode]((void *)ps_dec, ps_params->s_ref.pu1_v + ps_params->s_chroma.u4_src_offset, ps_params->s_chroma.u4_src_wd, ps_buf->pu1_v + ps_params->s_chroma.u4_dst_offset_res_buf, ps_params->s_chroma.u4_dst_wd_res_buf, ps_params->s_chroma.u4_cols, ps_params->s_chroma.u4_rows); } /*****************************************************************************/ /* */ /* Function Name : impeg2d_motion_comp_recon_buf */ /* */ /* Description : Perform motion compensation and store the resulting block*/ /* in the buf */ /* */ /* Inputs : params - Parameters required to do motion compensation */ /* */ /* Globals : */ /* */ /* Processing : Calls appropriate functions depending on the mode of */ /* compensation */ /* */ /* Outputs : buf - Buffer for the motion compensation result */ /* */ /* Returns : None */ /* */ /* Issues : None */ /* */ /* Revision History: */ /* */ /* DD MM YYYY Author(s) Changes */ /* 14 09 2005 Harish M First Version */ /* */ /*****************************************************************************/ void impeg2d_motion_comp_recon_buf(dec_state_t *ps_dec, mb_mc_params_t *ps_params, yuv_buf_t *ps_dest_buf) { PROFILE_DISABLE_MC_RETURN; /* Perform motion compensation for Y */ ps_dec->pf_mc[ps_params->s_luma.u4_mode](ps_dec, ps_params->s_ref.pu1_y + ps_params->s_luma.u4_src_offset, ps_params->s_luma.u4_src_wd, ps_dest_buf->pu1_y + ps_params->s_luma.u4_dst_offset_cur_frm, ps_params->s_luma.u4_dst_wd_cur_frm, ps_params->s_luma.u4_cols, ps_params->s_luma.u4_rows); /* Perform motion compensation for U */ ps_dec->pf_mc[ps_params->s_chroma.u4_mode](ps_dec, ps_params->s_ref.pu1_u + ps_params->s_chroma.u4_src_offset, ps_params->s_chroma.u4_src_wd, ps_dest_buf->pu1_u + ps_params->s_chroma.u4_dst_offset_cur_frm, ps_params->s_chroma.u4_dst_wd_cur_frm, ps_params->s_chroma.u4_cols, ps_params->s_chroma.u4_rows); /* Perform motion compensation for V */ ps_dec->pf_mc[ps_params->s_chroma.u4_mode](ps_dec, ps_params->s_ref.pu1_v + ps_params->s_chroma.u4_src_offset, ps_params->s_chroma.u4_src_wd, ps_dest_buf->pu1_v + ps_params->s_chroma.u4_dst_offset_cur_frm, ps_params->s_chroma.u4_dst_wd_cur_frm, ps_params->s_chroma.u4_cols, ps_params->s_chroma.u4_rows); } /*****************************************************************************/ /* */ /* Function Name : impeg2d_mc_1mv */ /* */ /* Description : Perform motion compensation and store the resulting block*/ /* in the buf */ /* */ /* Inputs : params - Parameters required to do motion compensation */ /* */ /* Globals : */ /* */ /* Processing : Calls appropriate functions depending on the mode of */ /* compensation */ /* */ /* Outputs : buf - Buffer for the motion compensation result */ /* */ /* Returns : None */ /* */ /* Issues : None */ /* */ /* Revision History: */ /* */ /* DD MM YYYY Author(s) Changes */ /* 14 09 2005 Hairsh M First Version */ /* */ /*****************************************************************************/ void impeg2d_mc_1mv(dec_state_t *ps_dec) { impeg2d_motion_comp_recon_buf(ps_dec, &ps_dec->as_mb_mc_params[ps_dec->e_mb_pred][FIRST], &ps_dec->s_dest_buf); } /*****************************************************************************/ /* */ /* Function Name : impeg2d_mc_fw_or_bk_mb */ /* */ /* Description : Perform motion compensation and store the resulting block*/ /* in the buf */ /* */ /* Inputs : params - Parameters required to do motion compensation */ /* */ /* Globals : */ /* */ /* Processing : Calls appropriate functions depending on the mode of */ /* compensation */ /* */ /* Outputs : buf - Buffer for the motion compensation result */ /* */ /* Returns : None */ /* */ /* Issues : None */ /* */ /* Revision History: */ /* */ /* DD MM YYYY Author(s) Changes */ /* 14 09 2005 Hairsh M First Version */ /* */ /*****************************************************************************/ void impeg2d_mc_fw_or_bk_mb(dec_state_t *ps_dec) { impeg2d_motion_comp_recon_buf(ps_dec, &ps_dec->as_mb_mc_params[FORW][FIRST], &ps_dec->s_dest_buf); impeg2d_motion_comp_recon_buf(ps_dec, &ps_dec->as_mb_mc_params[FORW][SECOND], &ps_dec->s_dest_buf); } /*****************************************************************************/ /* */ /* Function Name : impeg2d_mc_frm_dual_prime */ /* */ /* Description : Perform motion compensation and store the resulting block*/ /* in the buf */ /* */ /* Inputs : params - Parameters required to do motion compensation */ /* */ /* Globals : */ /* */ /* Processing : Calls appropriate functions depending on the mode of */ /* compensation */ /* */ /* Outputs : buf - Buffer for the motion compensation result */ /* */ /* Returns : None */ /* */ /* Issues : None */ /* */ /* Revision History: */ /* */ /* DD MM YYYY Author(s) Changes */ /* 14 09 2005 Hairsh M First Version */ /* */ /*****************************************************************************/ void impeg2d_mc_frm_dual_prime(dec_state_t *ps_dec) { /************************************************************************/ /* Perform Motion Compensation */ /************************************************************************/ impeg2d_motion_comp(ps_dec, &ps_dec->as_mb_mc_params[FORW][FIRST], &ps_dec->s_mc_fw_buf); impeg2d_motion_comp(ps_dec, &ps_dec->as_mb_mc_params[BACK][FIRST], &ps_dec->s_mc_bk_buf); impeg2d_motion_comp(ps_dec, &ps_dec->as_mb_mc_params[FORW][SECOND], &ps_dec->s_mc_fw_buf); impeg2d_motion_comp(ps_dec, &ps_dec->as_mb_mc_params[BACK][SECOND], &ps_dec->s_mc_bk_buf); ps_dec->pf_interpolate(&ps_dec->s_mc_fw_buf,&ps_dec->s_mc_bk_buf,&ps_dec->s_dest_buf,ps_dec->u2_picture_width); } /*****************************************************************************/ /* */ /* Function Name : impeg2d_mc_fld_dual_prime */ /* */ /* Description : Perform motion compensation and store the resulting block*/ /* in the buf */ /* */ /* Inputs : params - Parameters required to do motion compensation */ /* */ /* Globals : */ /* */ /* Processing : Calls appropriate functions depending on the mode of */ /* compensation */ /* */ /* Outputs : buf - Buffer for the motion compensation result */ /* */ /* Returns : None */ /* */ /* Issues : None */ /* */ /* Revision History: */ /* */ /* DD MM YYYY Author(s) Changes */ /* 14 09 2005 Hairsh M First Version */ /* */ /*****************************************************************************/ void impeg2d_mc_fld_dual_prime(dec_state_t *ps_dec) { /************************************************************************/ /* Perform Motion Compensation */ /************************************************************************/ impeg2d_motion_comp(ps_dec, &ps_dec->as_mb_mc_params[FORW][FIRST], &ps_dec->s_mc_fw_buf); impeg2d_motion_comp(ps_dec, &ps_dec->as_mb_mc_params[FORW][SECOND], &ps_dec->s_mc_bk_buf); ps_dec->pf_interpolate(&ps_dec->s_mc_fw_buf,&ps_dec->s_mc_bk_buf,&ps_dec->s_dest_buf,ps_dec->u2_picture_width); } /*****************************************************************************/ /* */ /* Function Name : impeg2d_mc_4mv */ /* */ /* Description : Perform motion compensation and store the resulting block*/ /* in the buf */ /* */ /* Inputs : params - Parameters required to do motion compensation */ /* */ /* Globals : */ /* */ /* Processing : Calls appropriate functions depending on the mode of */ /* compensation */ /* */ /* Outputs : buf - Buffer for the motion compensation result */ /* */ /* Returns : None */ /* */ /* Issues : None */ /* */ /* Revision History: */ /* */ /* DD MM YYYY Author(s) Changes */ /* 14 09 2005 Hairsh M First Version */ /* */ /*****************************************************************************/ void impeg2d_mc_4mv(dec_state_t *ps_dec) { /************************************************************************/ /* Perform Motion Compensation */ /************************************************************************/ impeg2d_motion_comp(ps_dec, &ps_dec->as_mb_mc_params[FORW][FIRST], &ps_dec->s_mc_fw_buf); impeg2d_motion_comp(ps_dec, &ps_dec->as_mb_mc_params[BACK][FIRST], &ps_dec->s_mc_bk_buf); impeg2d_motion_comp(ps_dec, &ps_dec->as_mb_mc_params[FORW][SECOND], &ps_dec->s_mc_fw_buf); impeg2d_motion_comp(ps_dec, &ps_dec->as_mb_mc_params[BACK][SECOND], &ps_dec->s_mc_bk_buf); ps_dec->pf_interpolate(&ps_dec->s_mc_fw_buf,&ps_dec->s_mc_bk_buf,&ps_dec->s_dest_buf,ps_dec->u2_picture_width); } /*****************************************************************************/ /* */ /* Function Name : impeg2d_mc_2mv */ /* */ /* Description : Perform motion compensation and store the resulting block*/ /* in the buf */ /* */ /* Inputs : params - Parameters required to do motion compensation */ /* */ /* Globals : */ /* */ /* Processing : Calls appropriate functions depending on the mode of */ /* compensation */ /* */ /* Outputs : buf - Buffer for the motion compensation result */ /* */ /* Returns : None */ /* */ /* Issues : None */ /* */ /* Revision History: */ /* */ /* DD MM YYYY Author(s) Changes */ /* 14 09 2005 Hairsh M First Version */ /* */ /*****************************************************************************/ void impeg2d_mc_2mv(dec_state_t *ps_dec) { /************************************************************************/ /* Perform Motion Compensation */ /************************************************************************/ impeg2d_motion_comp(ps_dec, &ps_dec->as_mb_mc_params[FORW][FIRST], &ps_dec->s_mc_fw_buf); impeg2d_motion_comp(ps_dec, &ps_dec->as_mb_mc_params[BACK][FIRST], &ps_dec->s_mc_bk_buf); ps_dec->pf_interpolate(&ps_dec->s_mc_fw_buf,&ps_dec->s_mc_bk_buf,&ps_dec->s_dest_buf,ps_dec->u2_picture_width); } /***************************************************************************** * Function Name : impeg2d_dec_intra_mb * * Description : Performs decoding of Intra MB * * Arguments : * dec : Decoder state * * Values Returned : None *****************************************************************************/ void impeg2d_dec_intra_mb(dec_state_t *ps_dec) { ps_dec->u2_cbp = 0x3F; if(ps_dec->u2_concealment_motion_vectors) { stream_t *ps_stream; ps_stream = &ps_dec->s_bit_stream; /* Decode the concealment motion vector */ impeg2d_dec_mv(ps_stream,ps_dec->ai2_pred_mv[FORW][FIRST],ps_dec->ai2_mv[FORW][FIRST], ps_dec->au2_f_code[FORW],0,ps_dec->u2_fld_pic); /* Set the second motion vector predictor */ ps_dec->ai2_pred_mv[FORW][SECOND][MV_X] = ps_dec->ai2_pred_mv[FORW][FIRST][MV_X]; ps_dec->ai2_pred_mv[FORW][SECOND][MV_Y] = ps_dec->ai2_pred_mv[FORW][FIRST][MV_Y]; /* Flush the marker bit */ if(0 == (impeg2d_bit_stream_get(ps_stream,1))) { /* Ignore marker bit error */ } } else { /* Reset the motion vector predictors */ memset(ps_dec->ai2_pred_mv,0,sizeof(ps_dec->ai2_pred_mv)); } } /***************************************************************************** * Function Name : impeg2d_dec_skip_p_mb * * Description : Performs decoding needed for Skipped MB encountered in * P Pictures and B Pictures with previous MB not bi-predicted * * Arguments : * dec : Decoder state * * Values Returned : None *****************************************************************************/ void impeg2d_dec_skip_p_mb(dec_state_t *ps_dec, WORD32 u4_num_of_mbs) { WORD16 *pi2_mv; e_mb_type_t e_mb_type; mb_mc_params_t *ps_mc; WORD32 i4_iter; UWORD32 u4_dst_wd; UWORD32 u4_dst_offset_x; UWORD32 u4_dst_offset_y; UWORD32 u4_frm_offset = 0; yuv_buf_t s_dst; u4_dst_wd = ps_dec->u2_frame_width; if(ps_dec->u2_picture_structure != FRAME_PICTURE) { u4_dst_wd <<= 1; if(ps_dec->u2_picture_structure == BOTTOM_FIELD) { u4_frm_offset = ps_dec->u2_frame_width; } } for (i4_iter = u4_num_of_mbs; i4_iter > 0; i4_iter--) { if(ps_dec->u2_picture_structure == FRAME_PICTURE) { e_mb_type = MC_FRM_FW_AND_BK_2MV; } else { e_mb_type = MC_FLD_FW_AND_BK_2MV; } ps_dec->u2_prev_intra_mb = 0; pi2_mv = (WORD16 *)&(ps_dec->ai2_mv[FORW][FIRST]); /* Reset the motion vector predictors */ if(ps_dec->e_pic_type == P_PIC) { memset(ps_dec->ai2_pred_mv,0,sizeof(ps_dec->ai2_pred_mv)); pi2_mv[MV_X] = pi2_mv[MV_Y] = 0; ps_dec->u2_cbp = 0; pi2_mv = (WORD16 *)&ps_dec->ai2_mv[FORW][FIRST]; ps_mc = &ps_dec->as_mb_mc_params[FORW][FIRST]; ps_mc->s_ref = ps_dec->as_ref_buf[ps_dec->e_mb_pred][ps_dec->u2_fld_parity]; impeg2d_set_mc_params(&ps_mc->s_luma, &ps_mc->s_chroma, e_mb_type, 0, pi2_mv, ps_dec->u2_mb_x, ps_dec->u2_mb_y, ps_dec->u2_frame_width, ps_dec->u2_frame_height,ps_dec->u2_picture_width); u4_dst_offset_x = (ps_dec->u2_mb_x << 4) + u4_frm_offset; u4_dst_offset_y = (ps_dec->u2_mb_y << 4) * u4_dst_wd; s_dst.pu1_y = ps_dec->s_cur_frm_buf.pu1_y + u4_dst_offset_x + u4_dst_offset_y; u4_dst_offset_x = u4_dst_offset_x >> 1; u4_dst_offset_y = u4_dst_offset_y >> 2; s_dst.pu1_u = ps_dec->s_cur_frm_buf.pu1_u + u4_dst_offset_x + u4_dst_offset_y; s_dst.pu1_v = ps_dec->s_cur_frm_buf.pu1_v + u4_dst_offset_x + u4_dst_offset_y; ps_mc->s_ref.pu1_y += ps_mc->s_luma.u4_src_offset; ps_mc->s_ref.pu1_u += ps_mc->s_chroma.u4_src_offset; ps_mc->s_ref.pu1_v += ps_mc->s_chroma.u4_src_offset; ps_dec->pf_copy_mb(&ps_mc->s_ref, &s_dst, ps_mc->s_luma.u4_src_wd, u4_dst_wd); } else { pi2_mv[MV_X] = ps_dec->ai2_pred_mv[ps_dec->e_mb_pred][FIRST][MV_X]; pi2_mv[MV_Y] = ps_dec->ai2_pred_mv[ps_dec->e_mb_pred][FIRST][MV_Y]; ps_dec->u2_cbp = 0; pi2_mv = (WORD16 *)&ps_dec->ai2_mv[FORW][FIRST]; ps_mc = &ps_dec->as_mb_mc_params[FORW][FIRST]; ps_mc->s_ref = ps_dec->as_ref_buf[ps_dec->e_mb_pred][ps_dec->u2_fld_parity]; impeg2d_set_mc_params(&ps_mc->s_luma, &ps_mc->s_chroma, e_mb_type, 0, pi2_mv, ps_dec->u2_mb_x, ps_dec->u2_mb_y, ps_dec->u2_frame_width, ps_dec->u2_frame_height,ps_dec->u2_picture_width); u4_dst_offset_x = (ps_dec->u2_mb_x << 4) + u4_frm_offset; u4_dst_offset_y = (ps_dec->u2_mb_y << 4) * u4_dst_wd; ps_mc->s_luma.u4_dst_offset_res_buf = u4_dst_offset_x + u4_dst_offset_y; ps_mc->s_luma.u4_dst_wd_res_buf = u4_dst_wd; u4_dst_offset_x = u4_dst_offset_x >> 1; u4_dst_offset_y = u4_dst_offset_y >> 2; ps_mc->s_chroma.u4_dst_offset_res_buf = u4_dst_offset_x + u4_dst_offset_y; ps_mc->s_chroma.u4_dst_wd_res_buf = u4_dst_wd >> 1; impeg2d_motion_comp(ps_dec, ps_mc, &ps_dec->s_cur_frm_buf); } /********************************************************************/ /* Common MB processing tasks */ /********************************************************************/ ps_dec->u2_mb_x++; ps_dec->u2_num_mbs_left--; if (ps_dec->u2_mb_x == ps_dec->u2_num_horiz_mb) { ps_dec->u2_mb_x = 0; ps_dec->u2_mb_y++; } } } /******************************************************************************* * Function Name : impeg2d_dec_skip_b_mb * * Description : Performs processing needed for Skipped MB encountered in * B Pictures with previous MB bi-predicted. * * Arguments : * dec : Decoder state * * Values Returned : None *******************************************************************************/ void impeg2d_dec_skip_b_mb(dec_state_t *ps_dec, WORD32 u4_num_of_mbs) { WORD16 *pi2_mv; UWORD32 i; e_mb_type_t e_mb_type; mb_mc_params_t *ps_mc; WORD32 i4_iter; UWORD32 u4_dst_wd; yuv_buf_t s_dst; UWORD32 u4_dst_offset_x; UWORD32 u4_dst_offset_y; UWORD32 u4_frm_offset = 0; u4_dst_wd = ps_dec->u2_frame_width; s_dst = ps_dec->s_cur_frm_buf; if(ps_dec->u2_picture_structure != FRAME_PICTURE) { u4_dst_wd <<= 1; if(ps_dec->u2_picture_structure == BOTTOM_FIELD) { u4_frm_offset = ps_dec->u2_frame_width; } } for (i4_iter = u4_num_of_mbs; i4_iter > 0; i4_iter--) { ps_dec->u2_prev_intra_mb = 0; if(ps_dec->u2_picture_structure == FRAME_PICTURE) { e_mb_type = MC_FRM_FW_AND_BK_2MV; } else { e_mb_type = MC_FLD_FW_AND_BK_2MV; } /************************************************************************/ /* Setting of first motion vector for B MB */ /************************************************************************/ pi2_mv = (WORD16 *)&(ps_dec->ai2_mv[FORW][FIRST]); { pi2_mv[MV_X] = ps_dec->ai2_pred_mv[FORW][FIRST][MV_X]; pi2_mv[MV_Y] = ps_dec->ai2_pred_mv[FORW][FIRST][MV_Y]; } /************************************************************************/ /* Setting of second motion vector for B MB */ /************************************************************************/ pi2_mv = (WORD16 *)&(ps_dec->ai2_mv[BACK][FIRST]); { pi2_mv[MV_X] = ps_dec->ai2_pred_mv[BACK][FIRST][MV_X]; pi2_mv[MV_Y] = ps_dec->ai2_pred_mv[BACK][FIRST][MV_Y]; } ps_dec->u2_cbp = 0; for(i = 0; i < 2; i++) { pi2_mv = (WORD16 *)&ps_dec->ai2_mv[i][FIRST]; ps_mc = &ps_dec->as_mb_mc_params[i][FIRST]; ps_mc->s_ref = ps_dec->as_ref_buf[i][ps_dec->u2_fld_parity]; impeg2d_set_mc_params(&ps_mc->s_luma, &ps_mc->s_chroma, e_mb_type, 0, pi2_mv, ps_dec->u2_mb_x, ps_dec->u2_mb_y, ps_dec->u2_frame_width, ps_dec->u2_frame_height,ps_dec->u2_picture_width); } impeg2d_motion_comp(ps_dec, &ps_dec->as_mb_mc_params[FORW][FIRST], &ps_dec->s_mc_fw_buf); impeg2d_motion_comp(ps_dec, &ps_dec->as_mb_mc_params[BACK][FIRST], &ps_dec->s_mc_bk_buf); u4_dst_offset_x = (ps_dec->u2_mb_x << 4) + u4_frm_offset; u4_dst_offset_y = (ps_dec->u2_mb_y << 4) * u4_dst_wd; s_dst.pu1_y = ps_dec->s_cur_frm_buf.pu1_y + u4_dst_offset_x + u4_dst_offset_y; u4_dst_offset_x = u4_dst_offset_x >> 1; u4_dst_offset_y = u4_dst_offset_y >> 2; s_dst.pu1_u = ps_dec->s_cur_frm_buf.pu1_u + u4_dst_offset_x + u4_dst_offset_y; s_dst.pu1_v = ps_dec->s_cur_frm_buf.pu1_v + u4_dst_offset_x + u4_dst_offset_y; ps_dec->pf_interpolate(&ps_dec->s_mc_fw_buf,&ps_dec->s_mc_bk_buf,&s_dst, u4_dst_wd); // dec->pf_copy_mb(&dec->mc_buf, &dst, MB_SIZE, dst_wd); /********************************************************************/ /* Common MB processing tasks */ /********************************************************************/ ps_dec->u2_mb_x++; ps_dec->u2_num_mbs_left--; if (ps_dec->u2_mb_x == ps_dec->u2_num_horiz_mb) { ps_dec->u2_mb_x = 0; ps_dec->u2_mb_y++; } } } /******************************************************************************* * Function Name : impeg2d_dec_skip_mbs * * Description : Performs processing needed for Skipped MB encountered in * B Pictures with previous MB bi-predicted. * * Arguments : * dec : Decoder state * * Values Returned : None *******************************************************************************/ void impeg2d_dec_skip_mbs(dec_state_t *ps_dec, UWORD16 u2_num_skip_mbs) { PROFILE_DISABLE_SKIP_MB(); if(ps_dec->e_mb_pred == BIDIRECT) { impeg2d_dec_skip_b_mb(ps_dec, u2_num_skip_mbs); } else { impeg2d_dec_skip_p_mb(ps_dec, u2_num_skip_mbs); } ps_dec->u2_def_dc_pred[Y_LUMA] = 128 << ps_dec->u2_intra_dc_precision; ps_dec->u2_def_dc_pred[U_CHROMA] = 128 << ps_dec->u2_intra_dc_precision; ps_dec->u2_def_dc_pred[V_CHROMA] = 128 << ps_dec->u2_intra_dc_precision; } /***************************************************************************** * Function Name : impeg2d_dec_0mv_coded_mb * * Description : Decodes the MB with 0 MV but coded. This can occur in P * pictures only * * Arguments : * dec : Decoder state * * Values Returned : None *****************************************************************************/ void impeg2d_dec_0mv_coded_mb(dec_state_t *ps_dec) { WORD16 *pi2_mv; e_mb_type_t e_mb_type; mb_mc_params_t *ps_mc; if(ps_dec->u2_picture_structure == FRAME_PICTURE) { e_mb_type = MC_FRM_FW_AND_BK_2MV; } else { e_mb_type = MC_FLD_FW_AND_BK_2MV; } /* Reset the motion vector predictors */ memset(ps_dec->ai2_pred_mv,0,sizeof(ps_dec->ai2_pred_mv)); pi2_mv = (WORD16 *)&ps_dec->ai2_mv[FORW][FIRST]; ps_mc = &ps_dec->as_mb_mc_params[FORW][FIRST]; ps_mc->s_ref = ps_dec->as_ref_buf[FORW][ps_dec->u2_fld_parity]; pi2_mv[MV_X] = 0; pi2_mv[MV_Y] = 0; impeg2d_set_mc_params(&ps_mc->s_luma, &ps_mc->s_chroma, e_mb_type, 0, pi2_mv, ps_dec->u2_mb_x, ps_dec->u2_mb_y, ps_dec->u2_frame_width, ps_dec->u2_frame_height,ps_dec->u2_picture_width); } /*****************************************************************************/ /* */ /* Function Name : impeg2d_mc_halfx_halfy() */ /* */ /* Description : Gets the buffer from (0.5,0.5) to (8.5,8.5) */ /* and the above block of size 8 x 8 will be placed as a */ /* block from the current position of out_buf */ /* */ /* Inputs : ref - Reference frame from which the block will be */ /* block will be extracted. */ /* ref_wid - WIdth of reference frame */ /* out_wid - WIdth of the output frame */ /* blk_width - width of the block */ /* blk_width - height of the block */ /* */ /* Globals : None */ /* */ /* Processing : Point to the (0,0),(1,0),(0,1),(1,1) position in */ /* the ref frame.Interpolate these four values to get the */ /* value at(0.5,0.5).Repeat this to get an 8 x 8 block */ /* using 9 x 9 block from reference frame */ /* */ /* Outputs : out - Output containing the extracted block */ /* */ /* Returns : None */ /* */ /* Issues : None */ /* */ /* Revision History: */ /* */ /* DD MM YYYY Author(s) Changes */ /* 05 09 2005 Harish M First Version */ /* */ /*****************************************************************************/ void impeg2d_mc_halfx_halfy(void *pv_dec, UWORD8 *pu1_ref, UWORD32 u4_ref_wid, UWORD8 *pu1_out, UWORD32 u4_out_wid, UWORD32 u4_blk_width, UWORD32 u4_blk_height) { UWORD8 *pu1_out_ptr,*pu1_ref_ptr; dec_state_t *ps_dec = (dec_state_t *)pv_dec; pu1_out_ptr = pu1_out; pu1_ref_ptr = pu1_ref; if((u4_blk_width == MB_SIZE) && (u4_blk_height == MB_SIZE)) { /*luma 16 x 16*/ /*block 0*/ ps_dec->pf_halfx_halfy_8x8(pu1_out_ptr,pu1_ref_ptr,u4_ref_wid,u4_out_wid); /*block1*/ pu1_out_ptr = (pu1_out + BLK_SIZE); pu1_ref_ptr = (pu1_ref + BLK_SIZE); ps_dec->pf_halfx_halfy_8x8(pu1_out_ptr,pu1_ref_ptr,u4_ref_wid,u4_out_wid); /*block 2*/ pu1_out_ptr = pu1_out + BLK_SIZE * u4_out_wid; pu1_ref_ptr = pu1_ref + BLK_SIZE * u4_ref_wid; ps_dec->pf_halfx_halfy_8x8(pu1_out_ptr,pu1_ref_ptr,u4_ref_wid,u4_out_wid); /*block 3*/ pu1_out_ptr = pu1_out + BLK_SIZE * u4_out_wid + BLK_SIZE; pu1_ref_ptr = pu1_ref + BLK_SIZE * u4_ref_wid + BLK_SIZE; ps_dec->pf_halfx_halfy_8x8(pu1_out_ptr,pu1_ref_ptr,u4_ref_wid,u4_out_wid); } else if ((u4_blk_width == BLK_SIZE) && (u4_blk_height == BLK_SIZE)) { /*chroma 8 x 8*/ ps_dec->pf_halfx_halfy_8x8(pu1_out_ptr,pu1_ref_ptr,u4_ref_wid,u4_out_wid); } else if ((u4_blk_width == MB_SIZE) && (u4_blk_height == BLK_SIZE)) { /*block 0*/ ps_dec->pf_halfx_halfy_8x8(pu1_out_ptr,pu1_ref_ptr,u4_ref_wid,u4_out_wid); /*block 1*/ pu1_out_ptr = (pu1_out + BLK_SIZE); pu1_ref_ptr = (pu1_ref + BLK_SIZE); ps_dec->pf_halfx_halfy_8x8(pu1_out_ptr,pu1_ref_ptr,u4_ref_wid,u4_out_wid); } else { UWORD8 *ref_p0,*ref_p1,*ref_p2,*ref_p3; UWORD32 i,j; /* P0-P3 are the pixels in the reference frame and Q is the value being */ /* estimated */ /* P0 P1 Q P2 P3 */ ref_p0 = pu1_ref; ref_p1 = pu1_ref + 1; ref_p2 = pu1_ref + u4_ref_wid; ref_p3 = pu1_ref + u4_ref_wid + 1; for(i = 0; i < u4_blk_height; i++) { for(j = 0; j < u4_blk_width; j++) { *pu1_out++ = (( (*ref_p0++ ) + (*ref_p1++ ) + (*ref_p2++ ) + (*ref_p3++ ) + 2 ) >> 2); } ref_p0 += u4_ref_wid - u4_blk_width; ref_p1 += u4_ref_wid - u4_blk_width; ref_p2 += u4_ref_wid - u4_blk_width; ref_p3 += u4_ref_wid - u4_blk_width; pu1_out += u4_out_wid - u4_blk_width; } } return; } /*****************************************************************************/ /* */ /* Function Name : impeg2d_mc_halfx_fully() */ /* */ /* Description : Gets the buffer from (0.5,0) to (8.5,8) */ /* and the above block of size 8 x 8 will be placed as a */ /* block from the current position of out_buf */ /* */ /* Inputs : ref - Reference frame from which the block will be */ /* block will be extracted. */ /* ref_wid - WIdth of reference frame */ /* out_wid - WIdth of the output frame */ /* blk_width - width of the block */ /* blk_width - height of the block */ /* */ /* Globals : None */ /* */ /* Processing : Point to the (0,0) and (1,0) position in the ref frame */ /* Interpolate these two values to get the value at(0.5,0) */ /* Repeat this to get an 8 x 8 block using 9 x 8 block from */ /* reference frame */ /* */ /* Outputs : out - Output containing the extracted block */ /* */ /* Returns : None */ /* */ /* Issues : None */ /* */ /* Revision History: */ /* */ /* DD MM YYYY Author(s) Changes */ /* 05 09 2005 Harish M First Version */ /* */ /*****************************************************************************/ void impeg2d_mc_halfx_fully(void *pv_dec, UWORD8 *pu1_ref, UWORD32 u4_ref_wid, UWORD8 *pu1_out, UWORD32 u4_out_wid, UWORD32 u4_blk_width, UWORD32 u4_blk_height) { UWORD8 *pu1_out_ptr,*pu1_ref_ptr; dec_state_t *ps_dec = (dec_state_t *)pv_dec; pu1_out_ptr = pu1_out; pu1_ref_ptr = pu1_ref; if((u4_blk_width == MB_SIZE) && (u4_blk_height == MB_SIZE)) { /*luma 16 x 16*/ /*block 0*/ ps_dec->pf_halfx_fully_8x8(pu1_out_ptr,pu1_ref_ptr,u4_ref_wid,u4_out_wid); /*block1*/ pu1_out_ptr = (pu1_out + BLK_SIZE); pu1_ref_ptr = (pu1_ref + BLK_SIZE); ps_dec->pf_halfx_fully_8x8(pu1_out_ptr,pu1_ref_ptr,u4_ref_wid,u4_out_wid); /*block 2*/ pu1_out_ptr = pu1_out + BLK_SIZE * u4_out_wid; pu1_ref_ptr = pu1_ref + BLK_SIZE * u4_ref_wid; ps_dec->pf_halfx_fully_8x8(pu1_out_ptr,pu1_ref_ptr,u4_ref_wid,u4_out_wid); /*block 3*/ pu1_out_ptr = pu1_out + BLK_SIZE * u4_out_wid + BLK_SIZE; pu1_ref_ptr = pu1_ref + BLK_SIZE * u4_ref_wid + BLK_SIZE; ps_dec->pf_halfx_fully_8x8(pu1_out_ptr,pu1_ref_ptr,u4_ref_wid,u4_out_wid); } else if ((u4_blk_width == BLK_SIZE) && (u4_blk_height == BLK_SIZE)) { /*chroma 8 x 8*/ ps_dec->pf_halfx_fully_8x8(pu1_out_ptr,pu1_ref_ptr,u4_ref_wid,u4_out_wid); } else if ((u4_blk_width == MB_SIZE) && (u4_blk_height == BLK_SIZE)) { /*block 0*/ ps_dec->pf_halfx_fully_8x8(pu1_out_ptr,pu1_ref_ptr,u4_ref_wid,u4_out_wid); /*block 1*/ pu1_out_ptr = (pu1_out + BLK_SIZE); pu1_ref_ptr = (pu1_ref + BLK_SIZE); ps_dec->pf_halfx_fully_8x8(pu1_out_ptr,pu1_ref_ptr,u4_ref_wid,u4_out_wid); } else { UWORD8 *ref_p0,*ref_p1; UWORD32 i,j; /* P0-P3 are the pixels in the reference frame and Q is the value being */ /* estimated */ /* P0 Q P1 */ ref_p0 = pu1_ref; ref_p1 = pu1_ref + 1; for(i = 0; i < u4_blk_height; i++) { for(j = 0; j < u4_blk_width; j++) { *pu1_out++ = ((( *ref_p0++ ) + (*ref_p1++) + 1 ) >> 1); } ref_p0 += u4_ref_wid - u4_blk_width; ref_p1 += u4_ref_wid - u4_blk_width; pu1_out += u4_out_wid - u4_blk_width; } } return; } /*****************************************************************************/ /* */ /* Function Name : impeg2d_mc_fullx_halfy() */ /* */ /* Description : Gets the buffer from (0,0.5) to (8,8.5) */ /* and the above block of size 8 x 8 will be placed as a */ /* block from the current position of out_buf */ /* */ /* Inputs : ref - Reference frame from which the block will be */ /* block will be extracted. */ /* ref_wid - WIdth of reference frame */ /* out_wid - WIdth of the output frame */ /* blk_width - width of the block */ /* blk_width - height of the block */ /* */ /* Globals : None */ /* */ /* Processing : Point to the (0,0) and (0,1) position in the ref frame */ /* Interpolate these two values to get the value at(0,0.5) */ /* Repeat this to get an 8 x 8 block using 8 x 9 block from */ /* reference frame */ /* */ /* Outputs : out - Output containing the extracted block */ /* */ /* Returns : None */ /* */ /* Issues : None */ /* */ /* Revision History: */ /* */ /* DD MM YYYY Author(s) Changes */ /* 05 09 2005 Harish M First Version */ /* */ /*****************************************************************************/ void impeg2d_mc_fullx_halfy(void *pv_dec, UWORD8 *pu1_ref, UWORD32 u4_ref_wid, UWORD8 *pu1_out, UWORD32 u4_out_wid, UWORD32 u4_blk_width, UWORD32 u4_blk_height) { UWORD8 *pu1_out_ptr,*pu1_ref_ptr; dec_state_t *ps_dec = (dec_state_t *)pv_dec; pu1_out_ptr = pu1_out; pu1_ref_ptr = pu1_ref; if((u4_blk_width == MB_SIZE) && (u4_blk_height == MB_SIZE)) { /*luma 16 x 16*/ /*block 0*/ ps_dec->pf_fullx_halfy_8x8(pu1_out_ptr,pu1_ref_ptr,u4_ref_wid,u4_out_wid); /*block1*/ pu1_out_ptr = (pu1_out + BLK_SIZE); pu1_ref_ptr = (pu1_ref + BLK_SIZE); ps_dec->pf_fullx_halfy_8x8(pu1_out_ptr,pu1_ref_ptr,u4_ref_wid,u4_out_wid); /*block 2*/ pu1_out_ptr = pu1_out + BLK_SIZE * u4_out_wid; pu1_ref_ptr = pu1_ref + BLK_SIZE * u4_ref_wid; ps_dec->pf_fullx_halfy_8x8(pu1_out_ptr,pu1_ref_ptr,u4_ref_wid,u4_out_wid); /*block 3*/ pu1_out_ptr = pu1_out + BLK_SIZE * u4_out_wid + BLK_SIZE; pu1_ref_ptr = pu1_ref + BLK_SIZE * u4_ref_wid + BLK_SIZE; ps_dec->pf_fullx_halfy_8x8(pu1_out_ptr,pu1_ref_ptr,u4_ref_wid,u4_out_wid); } else if ((u4_blk_width == BLK_SIZE) && (u4_blk_height == BLK_SIZE)) { /*chroma 8 x 8*/ ps_dec->pf_fullx_halfy_8x8(pu1_out_ptr,pu1_ref_ptr,u4_ref_wid,u4_out_wid); } else if ((u4_blk_width == MB_SIZE) && (u4_blk_height == BLK_SIZE)) { /*block 0*/ ps_dec->pf_fullx_halfy_8x8(pu1_out_ptr,pu1_ref_ptr,u4_ref_wid,u4_out_wid); /*block 1*/ pu1_out_ptr = (pu1_out + BLK_SIZE); pu1_ref_ptr = (pu1_ref + BLK_SIZE); ps_dec->pf_fullx_halfy_8x8(pu1_out_ptr,pu1_ref_ptr,u4_ref_wid,u4_out_wid); } else if ((u4_blk_width == BLK_SIZE) && (u4_blk_height == (BLK_SIZE / 2))) { UWORD8 *ref_p0,*ref_p1; UWORD32 i,j; /* P0-P3 are the pixels in the reference frame and Q is the value being */ /* estimated */ /* P0 x P1 */ ref_p0 = pu1_ref; ref_p1 = pu1_ref + u4_ref_wid; for(i = 0; i < u4_blk_height; i++) { for(j = 0; j < u4_blk_width; j++) { *pu1_out++ = ((( *ref_p0++) + (*ref_p1++) + 1 ) >> 1); } ref_p0 += u4_ref_wid - u4_blk_width; ref_p1 += u4_ref_wid - u4_blk_width; pu1_out += u4_out_wid - u4_blk_width; } } return; } /*****************************************************************************/ /* */ /* Function Name : impeg2d_mc_fullx_fully() */ /* */ /* Description : Gets the buffer from (x,y) to (x+8,y+8) */ /* and the above block of size 8 x 8 will be placed as a */ /* block from the current position of out_buf */ /* */ /* Inputs : ref - Reference frame from which the block will be */ /* block will be extracted. */ /* ref_wid - WIdth of reference frame */ /* out_wid - WIdth of the output frame */ /* blk_width - width of the block */ /* blk_width - height of the block */ /* */ /* Globals : None */ /* */ /* Processing : Point to the (0,0) position in the ref frame */ /* Get an 8 x 8 block from reference frame */ /* */ /* Outputs : out - Output containing the extracted block */ /* */ /* Returns : None */ /* */ /* Issues : None */ /* */ /* Revision History: */ /* */ /* DD MM YYYY Author(s) Changes */ /* 05 09 2005 Harish M First Version */ /* */ /*****************************************************************************/ void impeg2d_mc_fullx_fully(void *pv_dec, UWORD8 *pu1_ref, UWORD32 u4_ref_wid, UWORD8 *pu1_out, UWORD32 u4_out_wid, UWORD32 u4_blk_width, UWORD32 u4_blk_height) { UWORD8 *pu1_out_ptr,*pu1_ref_ptr; dec_state_t *ps_dec = (dec_state_t *)pv_dec; pu1_out_ptr = pu1_out; pu1_ref_ptr = pu1_ref; if((u4_blk_width == MB_SIZE) && (u4_blk_height == MB_SIZE)) { /*luma 16 x 16*/ /*block 0*/ ps_dec->pf_fullx_fully_8x8(pu1_out_ptr,pu1_ref_ptr,u4_ref_wid,u4_out_wid); /*block1*/ pu1_out_ptr = (pu1_out + BLK_SIZE); pu1_ref_ptr = (pu1_ref + BLK_SIZE); ps_dec->pf_fullx_fully_8x8(pu1_out_ptr,pu1_ref_ptr,u4_ref_wid,u4_out_wid); /*block 2*/ pu1_out_ptr = pu1_out + BLK_SIZE * u4_out_wid; pu1_ref_ptr = pu1_ref + BLK_SIZE * u4_ref_wid; ps_dec->pf_fullx_fully_8x8(pu1_out_ptr,pu1_ref_ptr,u4_ref_wid,u4_out_wid); /*block 3*/ pu1_out_ptr = pu1_out + BLK_SIZE * u4_out_wid + BLK_SIZE; pu1_ref_ptr = pu1_ref + BLK_SIZE * u4_ref_wid + BLK_SIZE; ps_dec->pf_fullx_fully_8x8(pu1_out_ptr,pu1_ref_ptr,u4_ref_wid,u4_out_wid); } else if ((u4_blk_width == BLK_SIZE) && (u4_blk_height == BLK_SIZE)) { /*chroma 8 x 8*/ ps_dec->pf_fullx_fully_8x8(pu1_out_ptr,pu1_ref_ptr,u4_ref_wid,u4_out_wid); } else if ((u4_blk_width == MB_SIZE) && (u4_blk_height == BLK_SIZE)) { /*block 0*/ ps_dec->pf_fullx_fully_8x8(pu1_out_ptr,pu1_ref_ptr,u4_ref_wid,u4_out_wid); /*block 1*/ pu1_out_ptr = (pu1_out + BLK_SIZE); pu1_ref_ptr = (pu1_ref + BLK_SIZE); ps_dec->pf_fullx_fully_8x8(pu1_out_ptr,pu1_ref_ptr,u4_ref_wid,u4_out_wid); } else { UWORD32 i; for(i = 0; i < u4_blk_height; i++) { memcpy(pu1_out, pu1_ref, u4_blk_width); pu1_ref += u4_ref_wid; pu1_out += u4_out_wid; } } return; } /******************************************************************************* * Function Name : impeg2d_set_mc_params * * Description : Sets the parameters for Motion Compensation * * Arguments : * luma : Parameters for luma blocks * chroma : Parameters for chroma blocks * type : Motion compensation type * mv_num : Number of motion vectors * mv : Motion Vectors * mb_x : X co-ordinate of MB * mb_y : Y co-ordinate of MB * frm_wd : Width of the frame * * Values Returned : None *******************************************************************************/ void impeg2d_set_mc_params(comp_mc_params_t *ps_luma, comp_mc_params_t *ps_chroma, e_mb_type_t e_type, UWORD16 u2_mv_num, WORD16 ai2_mv[], UWORD16 u2_mb_x, UWORD16 u2_mb_y, UWORD16 u2_frm_wd, UWORD16 u2_frm_ht, UWORD16 u2_picture_width) { WORD16 i2_mvy_round; WORD16 i2_mvx_round; const mc_type_consts_t *ps_mc_params; WORD16 i2_mvx_fullp_round; WORD16 i2_mvy_fullp_round; UWORD32 u4_frm_chroma_wd; WORD16 i2_pix_x, i2_pix_y; ps_mc_params = &gas_impeg2d_mc_params_luma[e_type][u2_mv_num]; /****************************************************************************/ /* get luma mc params */ /****************************************************************************/ i2_pix_x = MB_SIZE * u2_mb_x + (ai2_mv[MV_X]>>1); i2_pix_y = (MB_SIZE * u2_mb_y + (ai2_mv[MV_Y]>>1) * ps_mc_params->mvy_cf + u2_mv_num * ps_mc_params->mv_num_cf) * ps_mc_params->frm_wd_cf; // clip pix_x and pix_y so as it falls inside the frame boundary CLIP(i2_pix_x, (u2_frm_wd-16), 0); CLIP(i2_pix_y, (u2_frm_ht-16), 0); ps_luma->u4_src_offset = i2_pix_x + i2_pix_y * u2_frm_wd; /* keep offset in full pel */ ps_luma->u4_rows = ps_mc_params->rows; ps_luma->u4_cols = MB_SIZE; ps_luma->u4_dst_wd_res_buf = ps_mc_params->dst_wd; ps_luma->u4_src_wd = u2_frm_wd * ps_mc_params->src_wd_cf; ps_luma->u4_dst_offset_res_buf = ps_mc_params->dst_offset_scale * MB_SIZE; ps_luma->u4_dst_offset_cur_frm = ps_mc_params->dst_offset_scale * u2_picture_width; ps_luma->u4_mode = ((ai2_mv[MV_X] & 1) << 1) | (ai2_mv[MV_Y] & 1); /****************************************************************************/ /* get chroma mc params */ /****************************************************************************/ ps_mc_params = &gas_impeg2d_mc_params_chroma[e_type][u2_mv_num]; i2_mvx_round = ((ai2_mv[MV_X] + IS_NEG(ai2_mv[MV_X]))>>1); i2_mvy_round = ((ai2_mv[MV_Y] + IS_NEG(ai2_mv[MV_Y]))>>1); i2_mvx_fullp_round = (i2_mvx_round>>1); i2_mvy_fullp_round = (i2_mvy_round>>1)*ps_mc_params->mvy_cf; u4_frm_chroma_wd = (u2_frm_wd>>1); i2_pix_x = (MB_SIZE/2) * u2_mb_x + i2_mvx_fullp_round; i2_pix_y = ((MB_SIZE/2) * u2_mb_y + i2_mvy_fullp_round + u2_mv_num * ps_mc_params->mv_num_cf)*ps_mc_params->frm_wd_cf; CLIP(i2_pix_x, ((u2_frm_wd / 2)-8), 0); CLIP(i2_pix_y, ((u2_frm_ht / 2)-8), 0); ps_chroma->u4_src_offset = i2_pix_x + i2_pix_y * u4_frm_chroma_wd; /* keep offset in full pel */ ps_chroma->u4_rows = ps_mc_params->rows; ps_chroma->u4_cols = (MB_SIZE >> 1); ps_chroma->u4_dst_wd_res_buf = ps_mc_params->dst_wd; ps_chroma->u4_src_wd = (u2_frm_wd>>1) * ps_mc_params->src_wd_cf; ps_chroma->u4_dst_offset_res_buf = ps_mc_params->dst_offset_scale * MB_CHROMA_SIZE; ps_chroma->u4_dst_offset_cur_frm = ps_mc_params->dst_offset_scale * (u2_picture_width >> 1); ps_chroma->u4_mode = ((i2_mvx_round & 1) << 1) | (i2_mvy_round & 1); ps_luma->u4_dst_wd_cur_frm = u2_picture_width; ps_chroma->u4_dst_wd_cur_frm = u2_picture_width >> 1; if(ps_luma->u4_dst_wd_res_buf == MB_SIZE * 2) { ps_luma->u4_dst_wd_cur_frm = u2_frm_wd << 1; ps_chroma->u4_dst_wd_cur_frm = u2_frm_wd; } }