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329 lines
13 KiB
329 lines
13 KiB
/******************************************************************************
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*
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* Copyright (C) 2015 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at:
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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*****************************************************************************
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* Originally developed and contributed by Ittiam Systems Pvt. Ltd, Bangalore
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*/
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#include "iv_datatypedef.h"
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#include "iv.h"
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#include "impeg2_buf_mgr.h"
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#include "impeg2_disp_mgr.h"
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#include "impeg2_defs.h"
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#include "impeg2_platform_macros.h"
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#include "impeg2_inter_pred.h"
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#include "impeg2_idct.h"
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#include "impeg2_globals.h"
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#include "impeg2_mem_func.h"
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#include "impeg2_format_conv.h"
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#include "impeg2_macros.h"
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#include "ivd.h"
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#include "impeg2d.h"
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#include "impeg2d_bitstream.h"
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#include "impeg2d_structs.h"
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#include "impeg2d_vld_tables.h"
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#include "impeg2d_vld.h"
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#include "impeg2d_pic_proc.h"
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#include "impeg2d_debug.h"
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#include "impeg2d_globals.h"
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#include "impeg2d_mv_dec.h"
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/*******************************************************************************
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* Function Name : impeg2d_dec_i_mb_params
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*
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* Description : Decoding I MB parameters.
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*
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* Arguments :
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* dec : Decoder state
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* stream : Bitstream
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*
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* Values Returned : None
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*******************************************************************************/
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void impeg2d_dec_i_mb_params(dec_state_t *ps_dec)
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{
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UWORD16 u2_next_bits;
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UWORD16 u2_bits_to_flush;
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stream_t *ps_stream = &ps_dec->s_bit_stream;
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/*-----------------------------------------------------------------------*/
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/* Flush the MBAddrIncr Bit */
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/* */
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/* Since we are not supporting scalable modes there won't be skipped */
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/* macroblocks in I-Picture and the MBAddrIncr will always be 1, */
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/* The MBAddrIncr can never be greater than 1 for the simple and main */
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/* profile MPEG2. */
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/*-----------------------------------------------------------------------*/
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if(impeg2d_bit_stream_nxt(ps_stream,1) == 1) //Making sure the increment is one.
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{
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impeg2d_bit_stream_flush(ps_stream,1);
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}
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else if(ps_dec->u2_first_mb && ps_dec->u2_mb_x)
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{
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WORD32 i4_mb_add_inc = impeg2d_get_mb_addr_incr(ps_stream);
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//VOLParams->FirstInSlice = 0;
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/****************************************************************/
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/* Section 6.3.17 */
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/* The first MB of a slice cannot be skipped */
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/* But the mb_addr_incr can be > 1, because at the beginning of */
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/* a slice, it indicates the offset from the last MB in the */
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/* previous row. Hence for the first slice in a row, the */
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/* mb_addr_incr needs to be 1. */
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/****************************************************************/
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/* MB_x is set to zero whenever MB_y changes. */
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ps_dec->u2_mb_x = i4_mb_add_inc - 1;
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ps_dec->u2_mb_x = MIN(ps_dec->u2_mb_x, (ps_dec->u2_num_horiz_mb - 1));
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}
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/*-----------------------------------------------------------------------*/
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/* Decode the macroblock_type, dct_type and quantiser_scale_code */
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/* */
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/* macroblock_type 2 bits [can be either 1 or 01] */
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/* dct_type 1 bit */
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/* quantiser_scale_code 5 bits */
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/*-----------------------------------------------------------------------*/
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u2_next_bits = impeg2d_bit_stream_nxt(ps_stream,8);
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if(BIT(u2_next_bits,7) == 1)
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{
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/* read the dct_type if needed */
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u2_bits_to_flush = 1;
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if(ps_dec->u2_read_dct_type)
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{
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u2_bits_to_flush++;
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ps_dec->u2_field_dct = BIT(u2_next_bits,6);
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}
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}
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else
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{
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u2_bits_to_flush = 7;
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/*------------------------------------------------------------------*/
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/* read the dct_type if needed */
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/*------------------------------------------------------------------*/
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if(ps_dec->u2_read_dct_type)
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{
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u2_bits_to_flush++;
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ps_dec->u2_field_dct = BIT(u2_next_bits,5);
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}
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else
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{
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u2_next_bits >>= 1;
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}
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/*------------------------------------------------------------------*/
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/* Quant scale code decoding */
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/*------------------------------------------------------------------*/
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{
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UWORD16 quant_scale_code;
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quant_scale_code = u2_next_bits & 0x1F;
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ps_dec->u1_quant_scale = (ps_dec->u2_q_scale_type) ?
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gau1_impeg2_non_linear_quant_scale[quant_scale_code] :
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(quant_scale_code << 1);
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}
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}
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impeg2d_bit_stream_flush(ps_stream,u2_bits_to_flush);
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/*************************************************************************/
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/* Decoding of motion vectors if concealment motion vectors are present */
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/*************************************************************************/
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if(ps_dec->u2_concealment_motion_vectors)
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{
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if(ps_dec->u2_picture_structure != FRAME_PICTURE)
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impeg2d_bit_stream_flush(ps_stream,1);
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impeg2d_dec_mv(ps_stream,ps_dec->ai2_pred_mv[FORW][FIRST],ps_dec->ai2_mv[FORW][FIRST],
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ps_dec->au2_f_code[FORW],0,0);
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/* Flush the marker bit */
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if(0 == (impeg2d_bit_stream_get(ps_stream,1)))
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{
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/* Ignore marker bit error */
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}
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}
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ps_dec->u2_first_mb = 0;
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return;
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}
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/*******************************************************************************
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* Function Name : impeg2d_dec_i_slice
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*
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* Description : Decodes I slice
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*
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* Arguments :
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* dec : Decoder state
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*
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* Values Returned : None
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*******************************************************************************/
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IMPEG2D_ERROR_CODES_T impeg2d_dec_i_slice(dec_state_t *ps_dec)
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{
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WORD16 *pi2_vld_out;
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UWORD32 i;
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yuv_buf_t *ps_cur_frm_buf = &ps_dec->s_cur_frm_buf;
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UWORD32 u4_frame_width = ps_dec->u2_frame_width;
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UWORD32 u4_frm_offset = 0;
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UWORD8 *pu1_out_p;
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IMPEG2D_ERROR_CODES_T e_error = (IMPEG2D_ERROR_CODES_T)IVD_ERROR_NONE;
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pi2_vld_out = ps_dec->ai2_vld_buf;
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if(ps_dec->u2_picture_structure != FRAME_PICTURE)
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{
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u4_frame_width <<= 1;
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if(ps_dec->u2_picture_structure == BOTTOM_FIELD)
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{
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u4_frm_offset = ps_dec->u2_frame_width;
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}
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}
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do
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{
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UWORD32 u4_x_offset,u4_y_offset;
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UWORD32 u4_blk_pos;
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UWORD32 u4_x_dst_offset = 0;
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UWORD32 u4_y_dst_offset = 0;
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IMPEG2D_TRACE_MB_START(ps_dec->u2_mb_x, ps_dec->u2_mb_y);
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impeg2d_dec_i_mb_params(ps_dec);
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u4_x_dst_offset = u4_frm_offset + (ps_dec->u2_mb_x << 4);
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u4_y_dst_offset = (ps_dec->u2_mb_y << 4) * u4_frame_width;
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pu1_out_p = ps_cur_frm_buf->pu1_y + u4_x_dst_offset + u4_y_dst_offset;
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for(i = 0; i < NUM_LUMA_BLKS; ++i)
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{
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e_error = ps_dec->pf_vld_inv_quant(ps_dec, pi2_vld_out,
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ps_dec->pu1_inv_scan_matrix, 1, Y_LUMA, 0);
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if ((IMPEG2D_ERROR_CODES_T)IVD_ERROR_NONE != e_error)
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{
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return e_error;
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}
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u4_x_offset = gai2_impeg2_blk_x_off[i];
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if(ps_dec->u2_field_dct == 0)
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u4_y_offset = gai2_impeg2_blk_y_off_frm[i] ;
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else
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u4_y_offset = gai2_impeg2_blk_y_off_fld[i] ;
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u4_blk_pos = u4_y_offset * u4_frame_width + u4_x_offset;
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IMPEG2D_IDCT_INP_STATISTICS(pi2_vld_out, ps_dec->u4_non_zero_cols, ps_dec->u4_non_zero_rows);
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PROFILE_DISABLE_IDCT_IF0
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{
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WORD32 i4_idx;
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i4_idx = 1;
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if(1 == (ps_dec->u4_non_zero_cols | ps_dec->u4_non_zero_rows))
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i4_idx = 0;
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ps_dec->pf_idct_recon[i4_idx * 2 + ps_dec->i4_last_value_one](pi2_vld_out,
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ps_dec->ai2_idct_stg1,
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(UWORD8 *)gau1_impeg2_zerobuf,
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pu1_out_p + u4_blk_pos,
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8,
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8,
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u4_frame_width << ps_dec->u2_field_dct,
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~ps_dec->u4_non_zero_cols, ~ps_dec->u4_non_zero_rows);
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}
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}
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/* For U and V blocks, divide the x and y offsets by 2. */
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u4_x_dst_offset >>= 1;
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u4_y_dst_offset >>= 2;
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/* In case of chrominance blocks the DCT will be frame DCT */
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/* i = 0, U component and */
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e_error = ps_dec->pf_vld_inv_quant(ps_dec, pi2_vld_out,
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ps_dec->pu1_inv_scan_matrix, 1, U_CHROMA, 0);
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if ((IMPEG2D_ERROR_CODES_T)IVD_ERROR_NONE != e_error)
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{
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return e_error;
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}
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pu1_out_p = ps_cur_frm_buf->pu1_u + u4_x_dst_offset + u4_y_dst_offset;
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IMPEG2D_IDCT_INP_STATISTICS(pi2_vld_out, ps_dec->u4_non_zero_cols, ps_dec->u4_non_zero_rows);
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PROFILE_DISABLE_IDCT_IF0
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{
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WORD32 i4_idx;
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i4_idx = 1;
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if(1 == (ps_dec->u4_non_zero_cols | ps_dec->u4_non_zero_rows))
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i4_idx = 0;
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ps_dec->pf_idct_recon[i4_idx * 2 + ps_dec->i4_last_value_one](pi2_vld_out,
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ps_dec->ai2_idct_stg1,
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(UWORD8 *)gau1_impeg2_zerobuf,
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pu1_out_p,
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8,
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8,
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u4_frame_width >> 1,
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~ps_dec->u4_non_zero_cols, ~ps_dec->u4_non_zero_rows);
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}
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/* Write the idct_out block to the current frame dec->curFrame*/
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/* In case of field DCT type, write to alternate lines */
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e_error = ps_dec->pf_vld_inv_quant(ps_dec, pi2_vld_out,
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ps_dec->pu1_inv_scan_matrix, 1, V_CHROMA, 0);
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if ((IMPEG2D_ERROR_CODES_T)IVD_ERROR_NONE != e_error)
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{
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return e_error;
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}
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pu1_out_p = ps_cur_frm_buf->pu1_v + u4_x_dst_offset + u4_y_dst_offset;
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IMPEG2D_IDCT_INP_STATISTICS(pi2_vld_out, ps_dec->u4_non_zero_cols, ps_dec->u4_non_zero_rows);
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PROFILE_DISABLE_IDCT_IF0
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{
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WORD32 i4_idx;
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i4_idx = 1;
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if(1 == (ps_dec->u4_non_zero_cols | ps_dec->u4_non_zero_rows))
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i4_idx = 0;
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ps_dec->pf_idct_recon[i4_idx * 2 + ps_dec->i4_last_value_one](pi2_vld_out,
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ps_dec->ai2_idct_stg1,
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(UWORD8 *)gau1_impeg2_zerobuf,
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pu1_out_p,
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8,
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8,
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u4_frame_width >> 1,
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~ps_dec->u4_non_zero_cols, ~ps_dec->u4_non_zero_rows);
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}
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ps_dec->u2_num_mbs_left--;
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ps_dec->u2_mb_x++;
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if(ps_dec->s_bit_stream.u4_offset > ps_dec->s_bit_stream.u4_max_offset)
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{
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return IMPEG2D_BITSTREAM_BUFF_EXCEEDED_ERR;
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}
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else if (ps_dec->u2_mb_x == ps_dec->u2_num_horiz_mb)
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{
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ps_dec->u2_mb_x = 0;
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ps_dec->u2_mb_y++;
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}
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}
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while(ps_dec->u2_num_mbs_left != 0 && impeg2d_bit_stream_nxt(&ps_dec->s_bit_stream,23) != 0x0);
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return e_error;
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}
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