/******************************************************************************
*
* 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 <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_vld_tables.h"
#include "impeg2d_vld.h"
#include "impeg2d_pic_proc.h"
#include "impeg2d_debug.h"
void impeg2d_init_function_ptr(void *pv_codec);
void impeg2d_format_convert(dec_state_t *ps_dec,
pic_buf_t *ps_src_pic,
iv_yuv_buf_t *ps_disp_frm_buf,
UWORD32 u4_start_row, UWORD32 u4_num_rows)
{
UWORD8 *pu1_src_y,*pu1_src_u,*pu1_src_v;
UWORD8 *pu1_dst_y,*pu1_dst_u,*pu1_dst_v;
if((NULL == ps_src_pic) || (NULL == ps_src_pic->pu1_y) || (0 == u4_num_rows))
return;
pu1_src_y = ps_src_pic->pu1_y + (u4_start_row * ps_dec->u2_frame_width);
pu1_src_u = ps_src_pic->pu1_u + ((u4_start_row >> 1) * (ps_dec->u2_frame_width >> 1));
pu1_src_v = ps_src_pic->pu1_v + ((u4_start_row >> 1) *(ps_dec->u2_frame_width >> 1));
pu1_dst_y = (UWORD8 *)ps_disp_frm_buf->pv_y_buf + (u4_start_row * ps_dec->u4_frm_buf_stride);
pu1_dst_u = (UWORD8 *)ps_disp_frm_buf->pv_u_buf +((u4_start_row >> 1)*(ps_dec->u4_frm_buf_stride >> 1));
pu1_dst_v = (UWORD8 *)ps_disp_frm_buf->pv_v_buf +((u4_start_row >> 1)*(ps_dec->u4_frm_buf_stride >> 1));
if (IV_YUV_420P == ps_dec->i4_chromaFormat)
{
ps_dec->pf_copy_yuv420p_buf(pu1_src_y, pu1_src_u, pu1_src_v, pu1_dst_y,
pu1_dst_u, pu1_dst_v,
ps_dec->u2_horizontal_size,
u4_num_rows,
ps_dec->u2_frame_width,
(ps_dec->u2_frame_width >> 1),
(ps_dec->u2_frame_width >> 1),
ps_dec->u4_frm_buf_stride,
(ps_dec->u4_frm_buf_stride >> 1),
(ps_dec->u4_frm_buf_stride >> 1));
}
else if (IV_YUV_422ILE == ps_dec->i4_chromaFormat)
{
void *pv_yuv422i;
UWORD32 u2_height,u2_width,u2_stride_y,u2_stride_u,u2_stride_v;
UWORD32 u2_stride_yuv422i;
pv_yuv422i = (UWORD8 *)ps_disp_frm_buf->pv_y_buf + ((ps_dec->u2_vertical_size)*(ps_dec->u4_frm_buf_stride));
u2_height = u4_num_rows;
u2_width = ps_dec->u2_horizontal_size;
u2_stride_y = ps_dec->u2_frame_width;
u2_stride_u = u2_stride_y >> 1;
u2_stride_v = u2_stride_u;
u2_stride_yuv422i = (0 == ps_dec->u4_frm_buf_stride) ? ps_dec->u2_horizontal_size : ps_dec->u4_frm_buf_stride;
ps_dec->pf_fmt_conv_yuv420p_to_yuv422ile(pu1_src_y,
pu1_src_u,
pu1_src_v,
pv_yuv422i,
u2_width,
u2_height,
u2_stride_y,
u2_stride_u,
u2_stride_v,
u2_stride_yuv422i);
}
else if((ps_dec->i4_chromaFormat == IV_YUV_420SP_UV) ||
(ps_dec->i4_chromaFormat == IV_YUV_420SP_VU))
{
UWORD32 dest_inc_Y=0,dest_inc_UV=0;
WORD32 convert_uv_only;
pu1_dst_u = (UWORD8 *)ps_disp_frm_buf->pv_u_buf +((u4_start_row >> 1)*(ps_dec->u4_frm_buf_stride));
dest_inc_Y = ps_dec->u4_frm_buf_stride;
dest_inc_UV = ((ps_dec->u4_frm_buf_stride + 1) >> 1) << 1;
convert_uv_only = 0;
if(1 == ps_dec->u4_share_disp_buf)
convert_uv_only = 1;
if(pu1_src_y == pu1_dst_y)
convert_uv_only = 1;
if(ps_dec->i4_chromaFormat == IV_YUV_420SP_UV)
{
ps_dec->pf_fmt_conv_yuv420p_to_yuv420sp_uv(pu1_src_y,
pu1_src_u,
pu1_src_v,
pu1_dst_y,
pu1_dst_u,
u4_num_rows,
ps_dec->u2_horizontal_size,
ps_dec->u2_frame_width,
ps_dec->u2_frame_width >> 1,
ps_dec->u2_frame_width >> 1,
dest_inc_Y,
dest_inc_UV,
convert_uv_only);
}
else
{
ps_dec->pf_fmt_conv_yuv420p_to_yuv420sp_vu(pu1_src_y,
pu1_src_u,
pu1_src_v,
pu1_dst_y,
pu1_dst_u,
u4_num_rows,
ps_dec->u2_horizontal_size,
ps_dec->u2_frame_width,
ps_dec->u2_frame_width >> 1,
ps_dec->u2_frame_width >> 1,
dest_inc_Y,
dest_inc_UV,
convert_uv_only);
}
}
}
/*******************************************************************************
*
* Function Name : impeg2d_get_frm_buf
*
* Description : Gets YUV component buffers for the frame
*
* Arguments :
* frm_buf : YUV buffer
* frm : Reference frame
* width : Width of the frame
* Height : Height of the frame
*
* Values Returned : None
*******************************************************************************/
void impeg2d_get_frm_buf(yuv_buf_t *ps_frm_buf,UWORD8 *pu1_frm,UWORD32 u4_width,UWORD32 u4_height)
{
UWORD32 u4_luma_size = u4_width * u4_height;
UWORD32 u4_chroma_size = (u4_width * u4_height)>>2;
ps_frm_buf->pu1_y = pu1_frm;
ps_frm_buf->pu1_u = pu1_frm + u4_luma_size;
ps_frm_buf->pu1_v = pu1_frm + u4_luma_size + u4_chroma_size;
}
/*******************************************************************************
*
* Function Name : impeg2d_get_bottom_field_buf
*
* Description : Gets YUV component buffers for bottom field of the frame
*
* Arguments :
* frm_buf : YUV buffer
* frm : Reference frame
* width : Width of the frame
* Height : Height of the frame
*
* Values Returned : None
*******************************************************************************/
void impeg2d_get_bottom_field_buf(yuv_buf_t *ps_src_buf,yuv_buf_t *ps_dst_buf,
UWORD32 u4_width)
{
ps_dst_buf->pu1_y = ps_src_buf->pu1_y + u4_width;
ps_dst_buf->pu1_u = ps_src_buf->pu1_u + (u4_width>>1);
ps_dst_buf->pu1_v = ps_src_buf->pu1_v + (u4_width>>1);
}
/*******************************************************************************
* Function Name : impeg2d_get_mb_addr_incr
*
* Description : Decodes the Macroblock address increment
*
* Arguments :
* stream : Bitstream
*
* Values Returned : Macroblock address increment
*******************************************************************************/
UWORD16 impeg2d_get_mb_addr_incr(stream_t *ps_stream)
{
UWORD16 u2_mb_addr_incr = 0;
while (impeg2d_bit_stream_nxt(ps_stream,MB_ESCAPE_CODE_LEN) == MB_ESCAPE_CODE &&
ps_stream->u4_offset < ps_stream->u4_max_offset)
{
impeg2d_bit_stream_flush(ps_stream,MB_ESCAPE_CODE_LEN);
u2_mb_addr_incr += 33;
}
u2_mb_addr_incr += impeg2d_dec_vld_symbol(ps_stream,gai2_impeg2d_mb_addr_incr,MB_ADDR_INCR_LEN) +
MB_ADDR_INCR_OFFSET;
return(u2_mb_addr_incr);
}
/*******************************************************************************
*
* Function Name : impeg2d_init_video_state
*
* Description : Initializes the Video decoder state
*
* Arguments :
* dec : Decoder context
* videoType : MPEG_2_Video / MPEG_1_Video
*
* Values Returned : None
*******************************************************************************/
IMPEG2D_ERROR_CODES_T impeg2d_init_video_state(dec_state_t *ps_dec, e_video_type_t e_video_type)
{
/*-----------------------------------------------------------------------*/
/* Bit Stream that conforms to MPEG-1 <ISO/IEC 11172-2> standard */
/*-----------------------------------------------------------------------*/
if(e_video_type == MPEG_1_VIDEO)
{
ps_dec->u2_is_mpeg2 = 0;
/*-------------------------------------------------------------------*/
/* force MPEG-1 parameters for proper decoder behavior */
/* see ISO/IEC 13818-2 section D.9.14 */
/*-------------------------------------------------------------------*/
ps_dec->u2_progressive_sequence = 1;
ps_dec->u2_intra_dc_precision = 0;
ps_dec->u2_picture_structure = FRAME_PICTURE;
ps_dec->u2_frame_pred_frame_dct = 1;
ps_dec->u2_concealment_motion_vectors = 0;
ps_dec->u2_q_scale_type = 0;
ps_dec->u2_intra_vlc_format = 0;
ps_dec->u2_alternate_scan = 0;
ps_dec->u2_repeat_first_field = 0;
ps_dec->u2_progressive_frame = 1;
ps_dec->u2_frame_rate_extension_n = 0;
ps_dec->u2_frame_rate_extension_d = 0;
ps_dec->pf_vld_inv_quant = impeg2d_vld_inv_quant_mpeg1;
/*-------------------------------------------------------------------*/
/* Setting of parameters other than those mentioned in MPEG2 standard*/
/* but used in decoding process. */
/*-------------------------------------------------------------------*/
}
/*-----------------------------------------------------------------------*/
/* Bit Stream that conforms to MPEG-2 */
/*-----------------------------------------------------------------------*/
else
{
ps_dec->u2_is_mpeg2 = 1;
ps_dec->u2_full_pel_forw_vector = 0;
ps_dec->u2_forw_f_code = 7;
ps_dec->u2_full_pel_back_vector = 0;
ps_dec->u2_back_f_code = 7;
ps_dec->pf_vld_inv_quant = impeg2d_vld_inv_quant_mpeg2;
}
impeg2d_init_function_ptr(ps_dec);
/* Set the frame Width and frame Height */
ps_dec->u2_frame_height = ALIGN16(ps_dec->u2_vertical_size);
ps_dec->u2_frame_width = ALIGN16(ps_dec->u2_horizontal_size);
ps_dec->u2_num_horiz_mb = (ps_dec->u2_horizontal_size + 15) >> 4;
// dec->u4_frm_buf_stride = dec->frameWidth;
if (ps_dec->u2_frame_height > ps_dec->u2_create_max_height || ps_dec->u2_frame_width > ps_dec->u2_create_max_width)
{
return IMPEG2D_PIC_SIZE_NOT_SUPPORTED;
}
ps_dec->u2_num_flds_decoded = 0;
/* Calculate the frame period */
{
UWORD32 numer;
UWORD32 denom;
numer = (UWORD32)gau2_impeg2_frm_rate_code[ps_dec->u2_frame_rate_code][1] *
(UWORD32)(ps_dec->u2_frame_rate_extension_d + 1);
denom = (UWORD32)gau2_impeg2_frm_rate_code[ps_dec->u2_frame_rate_code][0] *
(UWORD32)(ps_dec->u2_frame_rate_extension_n + 1);
ps_dec->u2_framePeriod = (numer * 1000 * 100) / denom;
}
if(VERTICAL_SCAN == ps_dec->u2_alternate_scan)
{
ps_dec->pu1_inv_scan_matrix = (UWORD8 *)gau1_impeg2_inv_scan_vertical;
}
else
{
ps_dec->pu1_inv_scan_matrix = (UWORD8 *)gau1_impeg2_inv_scan_zig_zag;
}
return (IMPEG2D_ERROR_CODES_T)IVD_ERROR_NONE;
}
/*******************************************************************************
*
* Function Name : impeg2d_pre_pic_dec_proc
*
* Description : Does the processing neccessary before picture decoding
*
* Arguments :
* dec : Decoder context
*
* Values Returned : None
*******************************************************************************/
IMPEG2D_ERROR_CODES_T impeg2d_pre_pic_dec_proc(dec_state_t *ps_dec)
{
WORD32 u4_get_disp;
pic_buf_t *ps_disp_pic;
IMPEG2D_ERROR_CODES_T e_error = (IMPEG2D_ERROR_CODES_T)IVD_ERROR_NONE;
u4_get_disp = 0;
ps_disp_pic = NULL;
/* Field Picture */
if(ps_dec->u2_picture_structure != FRAME_PICTURE)
{
ps_dec->u2_num_vert_mb = (ps_dec->u2_vertical_size + 31) >> 5;
if(ps_dec->u2_num_flds_decoded == 0)
{
pic_buf_t *ps_pic_buf;
u4_get_disp = 1;
ps_pic_buf = impeg2_buf_mgr_get_next_free(ps_dec->pv_pic_buf_mg, &ps_dec->i4_cur_buf_id);
if (NULL == ps_pic_buf)
{
return IMPEG2D_NO_FREE_BUF_ERR;
}
impeg2_buf_mgr_set_status((buf_mgr_t *)ps_dec->pv_pic_buf_mg, ps_dec->i4_cur_buf_id, BUF_MGR_DISP);
impeg2_buf_mgr_set_status((buf_mgr_t *)ps_dec->pv_pic_buf_mg, ps_dec->i4_cur_buf_id, BUF_MGR_REF);
if(ps_dec->u4_deinterlace)
impeg2_buf_mgr_set_status((buf_mgr_t *)ps_dec->pv_pic_buf_mg, ps_dec->i4_cur_buf_id, MPEG2_BUF_MGR_DEINT);
ps_pic_buf->u4_ts = ps_dec->u4_inp_ts;
ps_pic_buf->e_pic_type = ps_dec->e_pic_type;
ps_dec->ps_cur_pic = ps_pic_buf;
ps_dec->s_cur_frm_buf.pu1_y = ps_pic_buf->pu1_y;
ps_dec->s_cur_frm_buf.pu1_u = ps_pic_buf->pu1_u;
ps_dec->s_cur_frm_buf.pu1_v = ps_pic_buf->pu1_v;
}
if(ps_dec->u2_picture_structure == TOP_FIELD)
{
ps_dec->u2_fld_parity = TOP;
}
else
{
ps_dec->u2_fld_parity = BOTTOM;
}
ps_dec->u2_field_dct = 0;
ps_dec->u2_read_dct_type = 0;
ps_dec->u2_read_motion_type = 1;
ps_dec->u2_fld_pic = 1;
ps_dec->u2_frm_pic = 0;
ps_dec->ps_func_forw_or_back = gas_impeg2d_func_fld_fw_or_bk;
ps_dec->ps_func_bi_direct = gas_impeg2d_func_fld_bi_direct;
}
/* Frame Picture */
else
{
pic_buf_t *ps_pic_buf;
ps_dec->u2_num_vert_mb = (ps_dec->u2_vertical_size + 15) >> 4;
u4_get_disp = 1;
ps_pic_buf = impeg2_buf_mgr_get_next_free(ps_dec->pv_pic_buf_mg, &ps_dec->i4_cur_buf_id);
if (NULL == ps_pic_buf)
{
return IMPEG2D_NO_FREE_BUF_ERR;
}
impeg2_buf_mgr_set_status((buf_mgr_t *)ps_dec->pv_pic_buf_mg, ps_dec->i4_cur_buf_id, BUF_MGR_DISP);
impeg2_buf_mgr_set_status((buf_mgr_t *)ps_dec->pv_pic_buf_mg, ps_dec->i4_cur_buf_id, BUF_MGR_REF);
if(ps_dec->u4_deinterlace)
impeg2_buf_mgr_set_status((buf_mgr_t *)ps_dec->pv_pic_buf_mg, ps_dec->i4_cur_buf_id, MPEG2_BUF_MGR_DEINT);
ps_pic_buf->u4_ts = ps_dec->u4_inp_ts;
ps_pic_buf->e_pic_type = ps_dec->e_pic_type;
ps_dec->ps_cur_pic = ps_pic_buf;
ps_dec->s_cur_frm_buf.pu1_y = ps_pic_buf->pu1_y;
ps_dec->s_cur_frm_buf.pu1_u = ps_pic_buf->pu1_u;
ps_dec->s_cur_frm_buf.pu1_v = ps_pic_buf->pu1_v;
if(ps_dec->u2_frame_pred_frame_dct == 0)
{
ps_dec->u2_read_dct_type = 1;
ps_dec->u2_read_motion_type = 1;
}
else
{
ps_dec->u2_read_dct_type = 0;
ps_dec->u2_read_motion_type = 0;
ps_dec->u2_motion_type = 2;
ps_dec->u2_field_dct = 0;
}
ps_dec->u2_fld_parity = TOP;
ps_dec->u2_fld_pic = 0;
ps_dec->u2_frm_pic = 1;
ps_dec->ps_func_forw_or_back = gas_impeg2d_func_frm_fw_or_bk;
ps_dec->ps_func_bi_direct = gas_impeg2d_func_frm_bi_direct;
}
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;
ps_dec->u2_num_mbs_left = ps_dec->u2_num_horiz_mb * ps_dec->u2_num_vert_mb;
if(u4_get_disp)
{
if(ps_dec->u4_num_frames_decoded > 1)
{
ps_disp_pic = impeg2_disp_mgr_get(&ps_dec->s_disp_mgr, &ps_dec->i4_disp_buf_id);
}
ps_dec->ps_disp_pic = ps_disp_pic;
if(ps_disp_pic)
{
if(1 == ps_dec->u4_share_disp_buf)
{
ps_dec->ps_disp_frm_buf->pv_y_buf = ps_disp_pic->pu1_y;
if(IV_YUV_420P == ps_dec->i4_chromaFormat)
{
ps_dec->ps_disp_frm_buf->pv_u_buf = ps_disp_pic->pu1_u;
ps_dec->ps_disp_frm_buf->pv_v_buf = ps_disp_pic->pu1_v;
}
else
{
UWORD8 *pu1_buf;
pu1_buf = ps_dec->as_disp_buffers[ps_disp_pic->i4_buf_id].pu1_bufs[1];
ps_dec->ps_disp_frm_buf->pv_u_buf = pu1_buf;
pu1_buf = ps_dec->as_disp_buffers[ps_disp_pic->i4_buf_id].pu1_bufs[2];
ps_dec->ps_disp_frm_buf->pv_v_buf = pu1_buf;
}
}
}
}
switch(ps_dec->e_pic_type)
{
case I_PIC:
{
ps_dec->pf_decode_slice = impeg2d_dec_i_slice;
break;
}
case D_PIC:
{
ps_dec->pf_decode_slice = impeg2d_dec_d_slice;
break;
}
case P_PIC:
{
ps_dec->pf_decode_slice = impeg2d_dec_p_b_slice;
ps_dec->pu2_mb_type = gau2_impeg2d_p_mb_type;
break;
}
case B_PIC:
{
ps_dec->pf_decode_slice = impeg2d_dec_p_b_slice;
ps_dec->pu2_mb_type = gau2_impeg2d_b_mb_type;
break;
}
default:
return IMPEG2D_INVALID_PIC_TYPE;
}
/*************************************************************************/
/* Set the reference pictures */
/*************************************************************************/
/* Error resilience: If forward and backward pictures are going to be NULL*/
/* then assign both to the current */
/* if one of them NULL then we will assign the non null to the NULL one */
if(ps_dec->e_pic_type == P_PIC)
{
if (NULL == ps_dec->as_recent_fld[1][0].pu1_y)
{
ps_dec->as_recent_fld[1][0] = ps_dec->s_cur_frm_buf;
}
if (NULL == ps_dec->as_recent_fld[1][1].pu1_y)
{
impeg2d_get_bottom_field_buf(&ps_dec->s_cur_frm_buf, &ps_dec->as_recent_fld[1][1],
ps_dec->u2_frame_width);
}
ps_dec->as_ref_buf[FORW][TOP] = ps_dec->as_recent_fld[1][0];
ps_dec->as_ref_buf[FORW][BOTTOM] = ps_dec->as_recent_fld[1][1];
}
else if(ps_dec->e_pic_type == B_PIC)
{
if((NULL == ps_dec->as_recent_fld[1][0].pu1_y) && (NULL == ps_dec->as_recent_fld[0][0].pu1_y))
{
// assign the current picture to both
ps_dec->as_recent_fld[1][0] = ps_dec->s_cur_frm_buf;
impeg2d_get_bottom_field_buf(&ps_dec->s_cur_frm_buf, &ps_dec->as_recent_fld[1][1],
ps_dec->u2_frame_width);
ps_dec->as_recent_fld[0][0] = ps_dec->s_cur_frm_buf;
ps_dec->as_recent_fld[0][1] = ps_dec->as_recent_fld[1][1];
}
//Assign the non-null picture to the null picture
else if ((NULL != ps_dec->as_recent_fld[1][0].pu1_y) && (NULL == ps_dec->as_recent_fld[0][0].pu1_y))
{
ps_dec->as_recent_fld[0][0] = ps_dec->as_recent_fld[1][0];
ps_dec->as_recent_fld[0][1] = ps_dec->as_recent_fld[1][1];
}
else if ((NULL == ps_dec->as_recent_fld[1][0].pu1_y) && (NULL != ps_dec->as_recent_fld[0][0].pu1_y))
{
ps_dec->as_recent_fld[1][0] = ps_dec->as_recent_fld[0][0];
ps_dec->as_recent_fld[1][1] = ps_dec->as_recent_fld[0][1];
}
/* Error resilience: If forward and backward pictures are going to be NULL*/
/* then assign both to the current */
/* if one of them NULL then we will assign the non null to the NULL one */
if((NULL == ps_dec->as_recent_fld[0][1].pu1_y) && (NULL == ps_dec->as_recent_fld[1][1].pu1_y))
{
// assign the current picture to both
ps_dec->as_recent_fld[1][0] = ps_dec->s_cur_frm_buf;
impeg2d_get_bottom_field_buf(&ps_dec->s_cur_frm_buf, &ps_dec->as_recent_fld[1][1],
ps_dec->u2_frame_width);
ps_dec->as_recent_fld[0][0] = ps_dec->s_cur_frm_buf;
ps_dec->as_recent_fld[0][1] = ps_dec->as_recent_fld[1][1];
}
//Assign the non-null picture to the null picture
else if((NULL == ps_dec->as_recent_fld[0][1].pu1_y) && (NULL != ps_dec->as_recent_fld[1][1].pu1_y))
{
ps_dec->as_recent_fld[0][0] = ps_dec->as_recent_fld[1][0];
ps_dec->as_recent_fld[0][1] = ps_dec->as_recent_fld[1][1];
}
else if((NULL == ps_dec->as_recent_fld[1][1].pu1_y) && (NULL != ps_dec->as_recent_fld[0][1].pu1_y))
{
ps_dec->as_recent_fld[1][0] = ps_dec->as_recent_fld[0][0];
ps_dec->as_recent_fld[1][1] = ps_dec->as_recent_fld[0][1];
}
ps_dec->as_ref_buf[FORW][TOP] = ps_dec->as_recent_fld[0][0];
ps_dec->as_ref_buf[FORW][BOTTOM] = ps_dec->as_recent_fld[0][1];
ps_dec->as_ref_buf[BACK][TOP] = ps_dec->as_recent_fld[1][0];
ps_dec->as_ref_buf[BACK][BOTTOM] = ps_dec->as_recent_fld[1][1];
}
return e_error;
}
/*******************************************************************************
*
* Function Name : impeg2d_post_pic_dec_proc
*
* Description : Performs processing that is needed at the end of picture
* decode
*
* Arguments :
* dec : Decoder context
*
* Values Returned : None
*******************************************************************************/
void impeg2d_post_pic_dec_proc(dec_state_t *ps_dec)
{
WORD32 u4_update_pic_buf = 0;
/*************************************************************************/
/* Processing at the end of picture */
/*************************************************************************/
if(ps_dec->u2_picture_structure != FRAME_PICTURE)
{
ps_dec->u2_num_vert_mb = (ps_dec->u2_vertical_size + 31) >> 5;
if(ps_dec->u2_num_flds_decoded == 1)
{
ps_dec->u2_num_flds_decoded = 0;
u4_update_pic_buf = 1;
}
else
{
ps_dec->u2_num_flds_decoded = 1;
}
}
else
{
u4_update_pic_buf = 1;
}
if(u4_update_pic_buf)
{
ps_dec->i4_frame_decoded = 1;
if(ps_dec->e_pic_type != B_PIC)
{
/* In any sequence first two pictures have to be reference pictures */
/* Adding of first picture in the sequence */
if(ps_dec->aps_ref_pics[0] == NULL)
{
ps_dec->aps_ref_pics[0] = ps_dec->ps_cur_pic;
}
/* Adding of second picture in the sequence */
else if(ps_dec->aps_ref_pics[1] == NULL)
{
ps_dec->aps_ref_pics[1] = ps_dec->ps_cur_pic;
impeg2_disp_mgr_add(&ps_dec->s_disp_mgr, ps_dec->aps_ref_pics[0], ps_dec->aps_ref_pics[0]->i4_buf_id);
}
else
{
impeg2_disp_mgr_add(&ps_dec->s_disp_mgr, ps_dec->aps_ref_pics[1], ps_dec->aps_ref_pics[1]->i4_buf_id);
impeg2_buf_mgr_release(ps_dec->pv_pic_buf_mg, ps_dec->aps_ref_pics[0]->i4_buf_id, BUF_MGR_REF);
ps_dec->aps_ref_pics[0] = ps_dec->aps_ref_pics[1];
ps_dec->aps_ref_pics[1] = ps_dec->ps_cur_pic;
}
}
else
{
impeg2_disp_mgr_add(&ps_dec->s_disp_mgr, ps_dec->ps_cur_pic, ps_dec->ps_cur_pic->i4_buf_id);
impeg2_buf_mgr_release(ps_dec->pv_pic_buf_mg, ps_dec->ps_cur_pic->i4_buf_id, BUF_MGR_REF);
}
}
/*************************************************************************/
/* Update the list of recent reference pictures */
/*************************************************************************/
if(ps_dec->e_pic_type != B_PIC)
{
switch(ps_dec->u2_picture_structure)
{
case FRAME_PICTURE:
{
ps_dec->as_recent_fld[0][0] = ps_dec->as_recent_fld[1][0];
ps_dec->as_recent_fld[0][1] = ps_dec->as_recent_fld[1][1];
ps_dec->as_recent_fld[1][0] = ps_dec->s_cur_frm_buf;
impeg2d_get_bottom_field_buf(&ps_dec->s_cur_frm_buf, &ps_dec->as_recent_fld[1][1],
ps_dec->u2_frame_width);
break;
}
case TOP_FIELD:
{
ps_dec->as_recent_fld[0][0] = ps_dec->as_recent_fld[1][0];
ps_dec->as_recent_fld[1][0] = ps_dec->s_cur_frm_buf;
break;
}
case BOTTOM_FIELD:
{
ps_dec->as_recent_fld[0][1] = ps_dec->as_recent_fld[1][1];
impeg2d_get_bottom_field_buf(&ps_dec->s_cur_frm_buf, &ps_dec->as_recent_fld[1][1],
ps_dec->u2_frame_width);
break;
}
}
}
}