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android/platform/external/libmpeg2/refs/heads/android17-security-release/./decoder/impeg2d_mc.c
blob: 229579c530cc2cf4db73fcd49fc353b122e57b8e [file] [edit]
/******************************************************************************
*
* 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 <string.h>
#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++)
{
memmove(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;
}
}