/******************************************************************************
*
* 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
*/
#include <stdio.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_vld_tables.h"
#include "impeg2d_pic_proc.h"
#include "impeg2d_debug.h"
#include "impeg2d_mv_dec.h"
#include "impeg2d_mc.h"
/*******************************************************************************
* Function name : impeg2d_dec_1mv
*
* Description : Decodes a motion vector and updates the predictors
*
* Arguments :
* stream : Bitstream
* predMv : Prediction for the motion vectors
* mv : Motion vectors
* fCode : fcode to the used for the decoding
* shift : Shift value to be used. This will be equal to
* (mv_format == "field") && (picture_structure == "Frame picture")
* i : 0 - MV_X and 1 - MV_Y
*
* Value Returned: None
*******************************************************************************/
INLINE void impeg2d_dec_1mv(stream_t *ps_stream, WORD16 ai2_pred_mv[], WORD16 ai2_mv[],UWORD16 au2_fCode[],
UWORD16 u2_mv_y_shift, WORD16 ai2_dmv[])
{
WORD16 i2_f;
WORD16 i2_r_size;
WORD16 i2_high,i2_low,i2_range;
UWORD32 u4_mv_code;
WORD16 i2_delta;
UWORD16 u2_first_bit;
WORD32 i;
WORD32 ai2_shifts[2];
UWORD32 u4_buf;
UWORD32 u4_buf_nxt;
UWORD32 u4_offset;
UWORD32 *pu4_buf_aligned;
ai2_shifts[0] = 0;
ai2_shifts[1] = u2_mv_y_shift;
GET_TEMP_STREAM_DATA(u4_buf,u4_buf_nxt,u4_offset,pu4_buf_aligned,ps_stream)
for(i = 0; i < 2; i++)
{
WORD32 i4_shift = ai2_shifts[i];
/* Decode the motion_code */
IBITS_NXT(u4_buf, u4_buf_nxt, u4_offset, u4_mv_code, MV_CODE_LEN)
u2_first_bit = (u4_mv_code >> (MV_CODE_LEN - 1)) & 0x01;
if(u2_first_bit == 1) /* mvCode == 0 */
{
i2_delta = 0;
FLUSH_BITS(u4_offset,u4_buf,u4_buf_nxt,1,pu4_buf_aligned)
ai2_mv[i] = (ai2_pred_mv[i] >> i4_shift);
ai2_pred_mv[i] = (ai2_mv[i] << i4_shift);
}
else
{
UWORD16 u2_index;
UWORD16 u2_value;
UWORD16 u2_mv_len;
UWORD16 u2_abs_mvcode_minus1;
UWORD16 u2_sign_bit;
i2_r_size = au2_fCode[i] - 1;
i2_f = 1 << i2_r_size;
i2_high = (16 * i2_f) - 1;
i2_low = ((-16) * i2_f);
i2_range = (32 * i2_f);
u2_index = (u4_mv_code >> 1) & 0x1FF;
u2_value = gau2_impeg2d_mv_code[u2_index];
u2_mv_len = (u2_value & 0x0F);
u2_abs_mvcode_minus1 = (u2_value >> 8) & 0x0FF;
u4_mv_code >>= (MV_CODE_LEN - u2_mv_len - 1);
u2_sign_bit = u4_mv_code & 0x1;
FLUSH_BITS(u4_offset,u4_buf,u4_buf_nxt,(u2_mv_len + 1),pu4_buf_aligned)
i2_delta = u2_abs_mvcode_minus1 * i2_f + 1;
if(i2_r_size)
{
UWORD32 val;
IBITS_GET(u4_buf, u4_buf_nxt, u4_offset, val, pu4_buf_aligned, i2_r_size)
i2_delta += val;
}
if(u2_sign_bit)
i2_delta = -i2_delta;
ai2_mv[i] = (ai2_pred_mv[i] >> i4_shift) + i2_delta;
if(ai2_mv[i] < i2_low)
{
ai2_mv[i] += i2_range;
}
if(ai2_mv[i] > i2_high)
{
ai2_mv[i] -= i2_range;
}
ai2_pred_mv[i] = (ai2_mv[i] << i4_shift);
}
if(ai2_dmv)
{
UWORD32 u4_val;
ai2_dmv[i] = 0;
IBITS_GET(u4_buf, u4_buf_nxt, u4_offset, u4_val, pu4_buf_aligned, 1)
if(u4_val)
{
IBITS_GET(u4_buf, u4_buf_nxt, u4_offset, u4_val, pu4_buf_aligned, 1)
ai2_dmv[i] = gai2_impeg2d_dec_mv[u4_val];
}
}
}
PUT_TEMP_STREAM_DATA(u4_buf, u4_buf_nxt, u4_offset, pu4_buf_aligned, ps_stream)
}
/*******************************************************************************
* Function name : impeg2d_dec_mv
*
* Description : Decodes a motion vector and updates the predictors
*
* Arguments :
* stream : Bitstream
* predMv : Prediction for the motion vectors
* mv : Motion vectors
* fCode : fcode to the used for the decoding
* shift : Shift value to be used. This will be equal to
* (mv_format == "field") && (picture_structure == "Frame picture")
*
* Value Returned: None
*******************************************************************************/
e_field_t impeg2d_dec_mv(stream_t *ps_stream, WORD16 ai2_pred_mv[], WORD16 ai2_mv[],UWORD16 au2_f_code[],
UWORD16 u2_shift, UWORD16 u2_fld_sel)
{
e_field_t e_fld;
if(u2_fld_sel)
{
e_fld = (e_field_t)impeg2d_bit_stream_get_bit(ps_stream);
}
else
{
e_fld = TOP;
}
impeg2d_dec_1mv(ps_stream,ai2_pred_mv,ai2_mv,au2_f_code,u2_shift,NULL);
return(e_fld);
}
/*****************************************************************************
* Function Name : impeg2d_dec_1mv_mb
*
* Description : Decodes mc params for 1 MV MB
*
* Arguments :
* dec : Decoder state
*
* Values Returned : None
*****************************************************************************/
void impeg2d_dec_1mv_mb(dec_state_t *ps_dec)
{
stream_t *ps_stream;
WORD16 *pi2_mv;
e_field_t e_fld;
mb_mc_params_t *ps_mc;
e_pred_direction_t e_ref_pic;
ps_stream = &ps_dec->s_bit_stream;
e_ref_pic = ps_dec->e_mb_pred;
/************************************************************************/
/* Decode the motion vector */
/************************************************************************/
pi2_mv = (WORD16 *)&ps_dec->ai2_mv[FORW][FIRST];
e_fld = impeg2d_dec_mv(ps_stream,ps_dec->ai2_pred_mv[e_ref_pic][FIRST],pi2_mv,
ps_dec->au2_f_code[e_ref_pic],0, ps_dec->u2_fld_pic);
ps_dec->ai2_pred_mv[e_ref_pic][SECOND][MV_X] = ps_dec->ai2_pred_mv[e_ref_pic][FIRST][MV_X];
ps_dec->ai2_pred_mv[e_ref_pic][SECOND][MV_Y] = ps_dec->ai2_pred_mv[e_ref_pic][FIRST][MV_Y];
/************************************************************************/
/* Set the motion vector params */
/************************************************************************/
ps_mc = &ps_dec->as_mb_mc_params[e_ref_pic][FIRST];
ps_mc->s_ref = ps_dec->as_ref_buf[e_ref_pic][e_fld];
impeg2d_set_mc_params(&ps_mc->s_luma, &ps_mc->s_chroma, ps_dec->s_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_dec_2mv_fw_or_bk_mb
*
* Description : Decodes first part of params for 2 MV Interpolated MB
*
* Arguments :
* dec : Decoder state
*
* Values Returned : None
*****************************************************************************/
void impeg2d_dec_2mv_fw_or_bk_mb(dec_state_t *ps_dec)
{
stream_t *ps_stream;
WORD16 *pi2_mv;
e_field_t e_fld;
mb_mc_params_t *ps_mc;
e_pred_direction_t e_ref_pic;
UWORD16 i;
ps_stream = &ps_dec->s_bit_stream;
e_ref_pic = ps_dec->e_mb_pred;
for(i = 0; i < 2; i++)
{
/********************************************************************/
/* Decode the first motion vector */
/********************************************************************/
pi2_mv = (WORD16 *)&ps_dec->ai2_mv[FORW][i];
e_fld = impeg2d_dec_mv(ps_stream,ps_dec->ai2_pred_mv[e_ref_pic][i],pi2_mv,
ps_dec->au2_f_code[e_ref_pic],ps_dec->u2_frm_pic, 1);
/********************************************************************/
/* Set the motion vector params */
/********************************************************************/
ps_mc = &ps_dec->as_mb_mc_params[FORW][i];
ps_mc->s_ref = ps_dec->as_ref_buf[e_ref_pic][e_fld];
impeg2d_set_mc_params(&ps_mc->s_luma, &ps_mc->s_chroma, ps_dec->s_mb_type, i,
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_dec_frm_dual_prime
*
* Description : Decodes first part of params for 2 MV Interpolated MB
*
* Arguments :
* dec : Decoder state
*
* Values Returned : None
*****************************************************************************/
void impeg2d_dec_frm_dual_prime(dec_state_t *ps_dec)
{
stream_t *ps_stream;
WORD16 *pi2_mv;
mb_mc_params_t *ps_mc;
WORD16 ai2_dmv[2];
WORD16 *pi2_mv1, *pi2_mv2, *pi2_mv3, *pi2_mv4;
UWORD16 i,j;
pi2_mv1 = (WORD16 *)&(ps_dec->ai2_mv[FORW][FIRST]);
pi2_mv2 = (WORD16 *)&(ps_dec->ai2_mv[FORW][SECOND]);
pi2_mv3 = (WORD16 *)&(ps_dec->ai2_mv[BACK][FIRST]);
pi2_mv4 = (WORD16 *)&(ps_dec->ai2_mv[BACK][SECOND]);
ps_stream = &ps_dec->s_bit_stream;
/************************************************************************/
/* Decode the motion vector MV_X, MV_Y and dmv[0], dmv[1] */
/************************************************************************/
impeg2d_dec_1mv(ps_stream,ps_dec->ai2_pred_mv[FORW][FIRST],pi2_mv1,ps_dec->au2_f_code[FORW],ps_dec->u2_frm_pic,ai2_dmv);
{
WORD16 ai2_m[2][2];
if(ps_dec->u2_top_field_first)
{
ai2_m[1][0] = 1;
ai2_m[0][1] = 3;
}
else
{
ai2_m[1][0] = 3;
ai2_m[0][1] = 1;
}
pi2_mv2[MV_X] = pi2_mv1[MV_X];
pi2_mv2[MV_Y] = pi2_mv1[MV_Y];
pi2_mv3[MV_X] = ai2_dmv[0] + DIV_2_RND(pi2_mv1[MV_X] * ai2_m[1][0]);
pi2_mv4[MV_X] = ai2_dmv[0] + DIV_2_RND(pi2_mv1[MV_X] * ai2_m[0][1]);
pi2_mv3[MV_Y] = ai2_dmv[1] + DIV_2_RND(pi2_mv1[MV_Y] * ai2_m[1][0]) - 1;
pi2_mv4[MV_Y] = ai2_dmv[1] + DIV_2_RND(pi2_mv1[MV_Y] * ai2_m[0][1]) + 1;
}
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];
/************************************************************************/
/* Set the motion vector params */
/************************************************************************/
for(j = 0; j < 2; j++)
{
for(i = 0; i < 2; i++)
{
pi2_mv = (WORD16 *)&ps_dec->ai2_mv[j][i];
ps_mc = &ps_dec->as_mb_mc_params[j][i];
ps_mc->s_ref = ps_dec->as_ref_buf[FORW][(i ^ j) & 1];
impeg2d_set_mc_params(&ps_mc->s_luma, &ps_mc->s_chroma, ps_dec->s_mb_type, i,
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_dec_fld_dual_prime
*
* Description : Decodes first part of params for 2 MV Interpolated MB
*
* Arguments :
* dec : Decoder state
*
* Values Returned : None
*****************************************************************************/
void impeg2d_dec_fld_dual_prime(dec_state_t *ps_dec)
{
stream_t *ps_stream;
WORD16 *pi2_mv;
mb_mc_params_t *ps_mc;
WORD16 *pi2_mv1, *pi2_mv2;
WORD16 ai2_dmv[2];
pi2_mv1 = (WORD16 *)&(ps_dec->ai2_mv[FORW][FIRST]);
pi2_mv2 = (WORD16 *)&(ps_dec->ai2_mv[FORW][SECOND]);
ps_stream = &ps_dec->s_bit_stream;
/************************************************************************/
/* Decode the motion vector MV_X, MV_Y and dmv[0], dmv[1] */
/************************************************************************/
impeg2d_dec_1mv(ps_stream,ps_dec->ai2_pred_mv[FORW][FIRST],pi2_mv1,ps_dec->au2_f_code[FORW],0,ai2_dmv);
pi2_mv2[MV_X] = ai2_dmv[0] + DIV_2_RND(pi2_mv1[MV_X]);
pi2_mv2[MV_Y] = ai2_dmv[1] + DIV_2_RND(pi2_mv1[MV_Y]);
if(ps_dec->u2_picture_structure == TOP_FIELD)
pi2_mv2[MV_Y] -= 1;
else
pi2_mv2[MV_Y] += 1;
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];
/************************************************************************/
/* Set the motion vector params */
/************************************************************************/
pi2_mv = (WORD16 *)&ps_dec->ai2_mv[FORW][0];
ps_mc = &ps_dec->as_mb_mc_params[FORW][0];
ps_mc->s_ref = ps_dec->as_ref_buf[FORW][ps_dec->u2_fld_parity];
impeg2d_set_mc_params(&ps_mc->s_luma, &ps_mc->s_chroma, ps_dec->s_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);
pi2_mv = (WORD16 *)&ps_dec->ai2_mv[FORW][1];
ps_mc = &ps_dec->as_mb_mc_params[FORW][1];
ps_mc->s_ref = ps_dec->as_ref_buf[FORW][!ps_dec->u2_fld_parity];
impeg2d_set_mc_params(&ps_mc->s_luma, &ps_mc->s_chroma, ps_dec->s_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_dec_4mv_mb
*
* Description : Decodes first part of params for 2 MV Interpolated MB
*
* Arguments :
* dec : Decoder state
*
* Values Returned : None
*****************************************************************************/
void impeg2d_dec_4mv_mb(dec_state_t *ps_dec)
{
stream_t *ps_stream;
WORD16 *pi2_mv;
e_field_t e_fld;
mb_mc_params_t *ps_mc;
UWORD16 i,j;
ps_stream = &ps_dec->s_bit_stream;
/***********************************************/
/* loop for FW & BK */
/***********************************************/
for(j = 0; j < 2; j++)
{
/***********************************************/
/* loop for decoding 2 mvs of same reference frame*/
/***********************************************/
for(i = 0; i < 2; i++)
{
/****************************************************************/
/* Decode the first motion vector */
/****************************************************************/
pi2_mv = (WORD16 *)&ps_dec->ai2_mv[j][i];
e_fld = impeg2d_dec_mv(ps_stream,ps_dec->ai2_pred_mv[j][i],pi2_mv,
ps_dec->au2_f_code[j],ps_dec->u2_frm_pic, 1);
/****************************************************************/
/* Set the motion vector params */
/****************************************************************/
ps_mc = &ps_dec->as_mb_mc_params[j][i];
ps_mc->s_ref = ps_dec->as_ref_buf[j][e_fld];
impeg2d_set_mc_params(&ps_mc->s_luma, &ps_mc->s_chroma, ps_dec->s_mb_type, i,
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_dec_2mv_interp_mb
*
* Description : Decodes first part of params for 2 MV Interpolated MB
*
* Arguments :
* dec : Decoder state
*
* Values Returned : None
*******************************************************************************/
void impeg2d_dec_2mv_interp_mb(dec_state_t *ps_dec)
{
stream_t *ps_stream;
WORD16 *pi2_mv;
e_field_t e_fld;
mb_mc_params_t *ps_mc;
UWORD16 i;
ps_stream = &ps_dec->s_bit_stream;
for(i = 0; i < 2; i++)
{
/********************************************************************/
/* Decode the first motion vector */
/********************************************************************/
pi2_mv = (WORD16 *)&ps_dec->ai2_mv[i][FIRST];
e_fld = impeg2d_dec_mv(ps_stream,ps_dec->ai2_pred_mv[i][FIRST],pi2_mv,
ps_dec->au2_f_code[i],0, ps_dec->u2_fld_pic);
ps_dec->ai2_pred_mv[i][SECOND][MV_X] = ps_dec->ai2_pred_mv[i][FIRST][MV_X];
ps_dec->ai2_pred_mv[i][SECOND][MV_Y] = ps_dec->ai2_pred_mv[i][FIRST][MV_Y];
/********************************************************************/
/* Set the motion vector params */
/********************************************************************/
ps_mc = &ps_dec->as_mb_mc_params[i][FIRST];
ps_mc->s_ref = ps_dec->as_ref_buf[i][e_fld];
impeg2d_set_mc_params(&ps_mc->s_luma, &ps_mc->s_chroma, ps_dec->s_mb_type,i,
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);
}
}