wrapper/libavc
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions
libavc/decoder/ih264d_parse_islice.c
Harish Mahendrakar 7950bf47b6 Fix in returning end of bitstream error for MBAFF 
In case of MBAFF streams, slices should terminate on
even MB boundary. If bytes are exhausted with odd number
of MBs decoded for MBAff, then treat that as error.

Bug: 33933140

Change-Id: Ifc26b66ff8ebdb3aec5c0d6c512e4cac3f54c5b7
2017-02-13 19:14:18 +00:00

1489 lines
58 KiB
C
Raw Blame History

/******************************************************************************
*
* 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 ih264d_parse_islice.c
*
* \brief
* Contains routines that decode a I slice type
*
* Detailed_description
*
* \date
* 07/07/2003
*
* \author NS
**************************************************************************
*/
#include "ih264d_error_handler.h"
#include "ih264d_debug.h"
#include <string.h>
#include "ih264d_bitstrm.h"
#include "ih264d_defs.h"
#include "ih264d_debug.h"
#include "ih264d_tables.h"
#include "ih264d_structs.h"
#include "ih264d_defs.h"
#include "ih264d_parse_cavlc.h"
#include "ih264d_mb_utils.h"
#include "ih264d_deblocking.h"
#include "ih264d_cabac.h"
#include "ih264d_parse_cabac.h"
#include "ih264d_parse_mb_header.h"
#include "ih264d_parse_slice.h"
#include "ih264d_process_pslice.h"
#include "ih264d_process_intra_mb.h"
#include "ih264d_parse_islice.h"
#include "ih264d_error_handler.h"
#include "ih264d_mvpred.h"
#include "ih264d_defs.h"
#include "ih264d_thread_parse_decode.h"
#include "ithread.h"
#include "ih264d_parse_mb_header.h"
#include "assert.h"
#include "ih264d_utils.h"
#include "ih264d_format_conv.h"
void ih264d_init_cabac_contexts(UWORD8 u1_slice_type, dec_struct_t * ps_dec);
void ih264d_itrans_recon_luma_dc(dec_struct_t *ps_dec,
WORD16* pi2_src,
WORD16* pi2_coeff_block,
const UWORD16 *pu2_weigh_mat);
/*!
**************************************************************************
* \if Function name : ParseIMb \endif
*
* \brief
* This function parses CAVLC syntax of a I MB. If 16x16 Luma DC transform
* is also done here. Transformed Luma DC values are copied in their
* 0th pixel location of corrosponding CoeffBlock.
*
* \return
* 0 on Success and Error code otherwise
**************************************************************************
*/
WORD32 ih264d_parse_imb_cavlc(dec_struct_t * ps_dec,
dec_mb_info_t * ps_cur_mb_info,
UWORD8 u1_mb_num,
UWORD8 u1_mb_type)
{
WORD32 i4_delta_qp;
UWORD32 u4_temp;
UWORD32 ui_is_top_mb_available;
UWORD32 ui_is_left_mb_available;
UWORD32 u4_cbp;
UWORD32 u4_offset;
UWORD32 *pu4_bitstrm_buf;
WORD32 ret;
dec_bit_stream_t * const ps_bitstrm = ps_dec->ps_bitstrm;
UWORD32 *pu4_bitstrm_ofst = &ps_bitstrm->u4_ofst;
UNUSED(u1_mb_num);
ps_cur_mb_info->u1_tran_form8x8 = 0;
ps_cur_mb_info->ps_curmb->u1_tran_form8x8 = 0;
ps_cur_mb_info->u1_yuv_dc_block_flag = 0;
u4_temp = ps_dec->u1_mb_ngbr_availablity;
ui_is_top_mb_available = BOOLEAN(u4_temp & TOP_MB_AVAILABLE_MASK);
ui_is_left_mb_available = BOOLEAN(u4_temp & LEFT_MB_AVAILABLE_MASK);
pu4_bitstrm_buf = ps_bitstrm->pu4_buffer;
if(u1_mb_type == I_4x4_MB)
{
ps_cur_mb_info->ps_curmb->u1_mb_type = I_4x4_MB;
u4_offset = 0;
/*--------------------------------------------------------------------*/
/* Read transform_size_8x8_flag if present */
/*--------------------------------------------------------------------*/
if(ps_dec->s_high_profile.u1_transform8x8_present)
{
ps_cur_mb_info->u1_tran_form8x8 = ih264d_get_bit_h264(ps_bitstrm);
COPYTHECONTEXT("transform_size_8x8_flag", ps_cur_mb_info->u1_tran_form8x8);
ps_cur_mb_info->ps_curmb->u1_tran_form8x8 = ps_cur_mb_info->u1_tran_form8x8;
}
/*--------------------------------------------------------------------*/
/* Read the IntraPrediction modes for LUMA */
/*--------------------------------------------------------------------*/
if (!ps_cur_mb_info->u1_tran_form8x8)
{
UWORD8 *pu1_temp;
ih264d_read_intra_pred_modes(ps_dec,
((UWORD8 *)ps_dec->pv_parse_tu_coeff_data),
((UWORD8 *)ps_dec->pv_parse_tu_coeff_data+16),
ps_cur_mb_info->u1_tran_form8x8);
pu1_temp = (UWORD8 *)ps_dec->pv_parse_tu_coeff_data;
pu1_temp += 32;
ps_dec->pv_parse_tu_coeff_data = (void *)pu1_temp;
}
else
{
UWORD8 *pu1_temp;
ih264d_read_intra_pred_modes(ps_dec,
((UWORD8 *)ps_dec->pv_parse_tu_coeff_data),
((UWORD8 *)ps_dec->pv_parse_tu_coeff_data+4),
ps_cur_mb_info->u1_tran_form8x8);
pu1_temp = (UWORD8 *)ps_dec->pv_parse_tu_coeff_data;
pu1_temp += 8;
ps_dec->pv_parse_tu_coeff_data = (void *)pu1_temp;
}
/*--------------------------------------------------------------------*/
/* Read the IntraPrediction mode for CHROMA */
/*--------------------------------------------------------------------*/
//Inlined ih264d_uev
{
UWORD32 u4_bitstream_offset = *pu4_bitstrm_ofst;
UWORD32 u4_word, u4_ldz, u4_temp;
/***************************************************************/
/* Find leading zeros in next 32 bits */
/***************************************************************/
NEXTBITS_32(u4_word, u4_bitstream_offset, pu4_bitstrm_buf);
u4_ldz = CLZ(u4_word);
/* Flush the ps_bitstrm */
u4_bitstream_offset += (u4_ldz + 1);
/* Read the suffix from the ps_bitstrm */
u4_word = 0;
if(u4_ldz)
{
GETBITS(u4_word, u4_bitstream_offset, pu4_bitstrm_buf,
u4_ldz);
}
*pu4_bitstrm_ofst = u4_bitstream_offset;
u4_temp = ((1 << u4_ldz) + u4_word - 1);
if(u4_temp > 3)
{
return ERROR_CHROMA_PRED_MODE;
}
ps_cur_mb_info->u1_chroma_pred_mode = u4_temp;
COPYTHECONTEXT("intra_chroma_pred_mode", ps_cur_mb_info->u1_chroma_pred_mode);
}
/*--------------------------------------------------------------------*/
/* Read the Coded block pattern */
/*--------------------------------------------------------------------*/
{
UWORD32 u4_bitstream_offset = *pu4_bitstrm_ofst;
UWORD32 u4_word, u4_ldz;
/***************************************************************/
/* Find leading zeros in next 32 bits */
/***************************************************************/
NEXTBITS_32(u4_word, u4_bitstream_offset, pu4_bitstrm_buf);
u4_ldz = CLZ(u4_word);
/* Flush the ps_bitstrm */
u4_bitstream_offset += (u4_ldz + 1);
/* Read the suffix from the ps_bitstrm */
u4_word = 0;
if(u4_ldz)
{
GETBITS(u4_word, u4_bitstream_offset, pu4_bitstrm_buf,
u4_ldz);
}
*pu4_bitstrm_ofst = u4_bitstream_offset;
u4_cbp = ((1 << u4_ldz) + u4_word - 1);
}
if(u4_cbp > 47)
{
return ERROR_CBP;
}
u4_cbp = gau1_ih264d_cbp_table[u4_cbp][0];
COPYTHECONTEXT("coded_block_pattern", u1_cbp);
ps_cur_mb_info->u1_cbp = u4_cbp;
/*--------------------------------------------------------------------*/
/* Read mb_qp_delta */
/*--------------------------------------------------------------------*/
if(ps_cur_mb_info->u1_cbp)
{
UWORD32 u4_bitstream_offset = *pu4_bitstrm_ofst;
UWORD32 u4_word, u4_ldz, u4_abs_val;
/***************************************************************/
/* Find leading zeros in next 32 bits */
/***************************************************************/
NEXTBITS_32(u4_word, u4_bitstream_offset, pu4_bitstrm_buf);
u4_ldz = CLZ(u4_word);
/* Flush the ps_bitstrm */
u4_bitstream_offset += (u4_ldz + 1);
/* Read the suffix from the ps_bitstrm */
u4_word = 0;
if(u4_ldz)
{
GETBITS(u4_word, u4_bitstream_offset, pu4_bitstrm_buf,
u4_ldz);
}
*pu4_bitstrm_ofst = u4_bitstream_offset;
u4_abs_val = ((1 << u4_ldz) + u4_word) >> 1;
if(u4_word & 0x1)
{
i4_delta_qp = (-(WORD32)u4_abs_val);
}
else
{
i4_delta_qp = (u4_abs_val);
}
if((i4_delta_qp < -26) || (i4_delta_qp > 25))
{
return ERROR_INV_RANGE_QP_T;
}
COPYTHECONTEXT("mb_qp_delta", i1_delta_qp);
if(i4_delta_qp != 0)
{
ret = ih264d_update_qp(ps_dec, (WORD8)i4_delta_qp);
if(ret != OK)
return ret;
}
}
}
else
{
u4_offset = 1;
ps_cur_mb_info->ps_curmb->u1_mb_type = I_16x16_MB;
/*-------------------------------------------------------------------*/
/* Read the IntraPrediction mode for CHROMA */
/*-------------------------------------------------------------------*/
{
UWORD32 u4_bitstream_offset = *pu4_bitstrm_ofst;
UWORD32 u4_word, u4_ldz;
/***************************************************************/
/* Find leading zeros in next 32 bits */
/***************************************************************/
NEXTBITS_32(u4_word, u4_bitstream_offset, pu4_bitstrm_buf);
u4_ldz = CLZ(u4_word);
/* Flush the ps_bitstrm */
u4_bitstream_offset += (u4_ldz + 1);
/* Read the suffix from the ps_bitstrm */
u4_word = 0;
if(u4_ldz)
{
GETBITS(u4_word, u4_bitstream_offset, pu4_bitstrm_buf,
u4_ldz);
}
*pu4_bitstrm_ofst = u4_bitstream_offset;
u4_temp = ((1 << u4_ldz) + u4_word - 1);
//Inlined ih264d_uev
if(u4_temp > 3)
{
return ERROR_CHROMA_PRED_MODE;
}
ps_cur_mb_info->u1_chroma_pred_mode = u4_temp;
COPYTHECONTEXT("intra_chroma_pred_mode", ps_cur_mb_info->u1_chroma_pred_mode);
}
/*-------------------------------------------------------------------*/
/* Read the Coded block pattern */
/*-------------------------------------------------------------------*/
u4_cbp = gau1_ih264d_cbp_tab[(u1_mb_type - 1) >> 2];
ps_cur_mb_info->u1_cbp = u4_cbp;
/*-------------------------------------------------------------------*/
/* Read mb_qp_delta */
/*-------------------------------------------------------------------*/
{
UWORD32 u4_bitstream_offset = *pu4_bitstrm_ofst;
UWORD32 u4_word, u4_ldz, u4_abs_val;
/***************************************************************/
/* Find leading zeros in next 32 bits */
/***************************************************************/
NEXTBITS_32(u4_word, u4_bitstream_offset, pu4_bitstrm_buf);
u4_ldz = CLZ(u4_word);
/* Flush the ps_bitstrm */
u4_bitstream_offset += (u4_ldz + 1);
/* Read the suffix from the ps_bitstrm */
u4_word = 0;
if(u4_ldz)
GETBITS(u4_word, u4_bitstream_offset, pu4_bitstrm_buf,
u4_ldz);
*pu4_bitstrm_ofst = u4_bitstream_offset;
u4_abs_val = ((1 << u4_ldz) + u4_word) >> 1;
if(u4_word & 0x1)
i4_delta_qp = (-(WORD32)u4_abs_val);
else
i4_delta_qp = (u4_abs_val);
if((i4_delta_qp < -26) || (i4_delta_qp > 25))
return ERROR_INV_RANGE_QP_T;
}
//inlinined ih264d_sev
COPYTHECONTEXT("Delta quant", i1_delta_qp);
if(i4_delta_qp != 0)
{
ret = ih264d_update_qp(ps_dec, (WORD8)i4_delta_qp);
if(ret != OK)
return ret;
}
{
WORD16 i_scaleFactor;
UWORD32 ui_N = 0;
WORD16 *pi2_scale_matrix_ptr;
/*******************************************************************/
/* for luma DC coefficients the scaling is done during the parsing */
/* to preserve the precision */
/*******************************************************************/
if(ps_dec->s_high_profile.u1_scaling_present)
{
pi2_scale_matrix_ptr =
ps_dec->s_high_profile.i2_scalinglist4x4[0];
}
else
{
i_scaleFactor = 16;
pi2_scale_matrix_ptr = &i_scaleFactor;
}
/*---------------------------------------------------------------*/
/* Decode DC coefficients */
/*---------------------------------------------------------------*/
/*---------------------------------------------------------------*/
/* Calculation of N */
/*---------------------------------------------------------------*/
if(ui_is_left_mb_available)
{
if(ui_is_top_mb_available)
{
ui_N = ((ps_cur_mb_info->ps_top_mb->pu1_nnz_y[0]
+ ps_dec->pu1_left_nnz_y[0] + 1) >> 1);
}
else
{
ui_N = ps_dec->pu1_left_nnz_y[0];
}
}
else if(ui_is_top_mb_available)
{
ui_N = ps_cur_mb_info->ps_top_mb->pu1_nnz_y[0];
}
{
WORD16 pi2_dc_coef[16];
WORD32 pi4_tmp[16];
tu_sblk4x4_coeff_data_t *ps_tu_4x4 =
(tu_sblk4x4_coeff_data_t *)ps_dec->pv_parse_tu_coeff_data;
WORD16 *pi2_coeff_block =
(WORD16 *)ps_dec->pv_parse_tu_coeff_data;
UWORD32 u4_num_coeff;
ps_tu_4x4->u2_sig_coeff_map = 0;
ret = ps_dec->pf_cavlc_parse4x4coeff[(ui_N > 7)](pi2_dc_coef, 0, ui_N,
ps_dec, &u4_num_coeff);
if(ret != OK)
return ret;
if(EXCEED_OFFSET(ps_bitstrm))
return ERROR_EOB_TERMINATE_T;
if(ps_tu_4x4->u2_sig_coeff_map)
{
memset(pi2_dc_coef,0,sizeof(pi2_dc_coef));
ih264d_unpack_coeff4x4_dc_4x4blk(ps_tu_4x4,
pi2_dc_coef,
ps_dec->pu1_inv_scan);
PROFILE_DISABLE_IQ_IT_RECON()
ps_dec->pf_ihadamard_scaling_4x4(pi2_dc_coef,
pi2_coeff_block,
ps_dec->pu2_quant_scale_y,
(UWORD16 *)pi2_scale_matrix_ptr,
ps_dec->u1_qp_y_div6,
pi4_tmp);
pi2_coeff_block += 16;
ps_dec->pv_parse_tu_coeff_data = (void *)pi2_coeff_block;
SET_BIT(ps_cur_mb_info->u1_yuv_dc_block_flag,0);
}
}
}
}
if(u4_cbp)
{
ret = ih264d_parse_residual4x4_cavlc(ps_dec, ps_cur_mb_info,
(UWORD8)u4_offset);
if(ret != OK)
return ret;
if(EXCEED_OFFSET(ps_bitstrm))
return ERROR_EOB_TERMINATE_T;
/* Store Left Mb NNZ and TOP chroma NNZ */
}
else
{
ps_cur_mb_info->u1_qp_div6 = ps_dec->u1_qp_y_div6;
ps_cur_mb_info->u1_qpc_div6 = ps_dec->u1_qp_u_div6;
ps_cur_mb_info->u1_qpcr_div6 = ps_dec->u1_qp_v_div6;
ps_cur_mb_info->u1_qp_rem6 = ps_dec->u1_qp_y_rem6;
ps_cur_mb_info->u1_qpc_rem6 = ps_dec->u1_qp_u_rem6;
ps_cur_mb_info->u1_qpcr_rem6 = ps_dec->u1_qp_v_rem6;
ih264d_update_nnz_for_skipmb(ps_dec, ps_cur_mb_info, CAVLC);
}
return OK;
}
/*!
**************************************************************************
* \if Function name : ParseIMbCab \endif
*
* \brief
* This function parses CABAC syntax of a I MB. If 16x16 Luma DC transform
* is also done here. Transformed Luma DC values are copied in their
* 0th pixel location of corrosponding CoeffBlock.
*
* \return
* 0 on Success and Error code otherwise
**************************************************************************
*/
WORD32 ih264d_parse_imb_cabac(dec_struct_t * ps_dec,
dec_mb_info_t * ps_cur_mb_info,
UWORD8 u1_mb_type)
{
WORD8 i1_delta_qp;
UWORD8 u1_cbp;
UWORD8 u1_offset;
/* Variables for handling Cabac contexts */
ctxt_inc_mb_info_t *p_curr_ctxt = ps_dec->ps_curr_ctxt_mb_info;
ctxt_inc_mb_info_t *ps_left_ctxt = ps_dec->p_left_ctxt_mb_info;
dec_bit_stream_t * const ps_bitstrm = ps_dec->ps_bitstrm;
bin_ctxt_model_t *p_bin_ctxt;
UWORD8 u1_intra_chrom_pred_mode;
UWORD8 u1_dc_block_flag = 0;
WORD32 ret;
ps_cur_mb_info->u1_yuv_dc_block_flag = 0;
if(ps_left_ctxt == ps_dec->ps_def_ctxt_mb_info)
{
ps_dec->pu1_left_yuv_dc_csbp[0] = 0xf;
}
if(ps_dec->ps_cur_slice->u1_slice_type != I_SLICE)
{
WORD32 *pi4_buf;
WORD8 *pi1_buf;
MEMSET_16BYTES(&ps_dec->pu1_left_mv_ctxt_inc[0][0], 0);
*((UWORD32 *)ps_dec->pi1_left_ref_idx_ctxt_inc) = 0;
MEMSET_16BYTES(p_curr_ctxt->u1_mv, 0);
pi1_buf = p_curr_ctxt->i1_ref_idx;
pi4_buf = (WORD32 *)pi1_buf;
*pi4_buf = 0;
}
if(u1_mb_type == I_4x4_MB)
{
ps_cur_mb_info->ps_curmb->u1_mb_type = I_4x4_MB;
p_curr_ctxt->u1_mb_type = CAB_I4x4;
u1_offset = 0;
ps_cur_mb_info->u1_tran_form8x8 = 0;
ps_cur_mb_info->ps_curmb->u1_tran_form8x8 = 0;
/*--------------------------------------------------------------------*/
/* Read transform_size_8x8_flag if present */
/*--------------------------------------------------------------------*/
if(ps_dec->s_high_profile.u1_transform8x8_present)
{
ps_cur_mb_info->u1_tran_form8x8 = ih264d_parse_transform8x8flag_cabac(
ps_dec, ps_cur_mb_info);
COPYTHECONTEXT("transform_size_8x8_flag", ps_cur_mb_info->u1_tran_form8x8);
p_curr_ctxt->u1_transform8x8_ctxt = ps_cur_mb_info->u1_tran_form8x8;
ps_cur_mb_info->ps_curmb->u1_tran_form8x8 = ps_cur_mb_info->u1_tran_form8x8;
}
else
{
p_curr_ctxt->u1_transform8x8_ctxt = 0;
}
/*--------------------------------------------------------------------*/
/* Read the IntraPrediction modes for LUMA */
/*--------------------------------------------------------------------*/
if (!ps_cur_mb_info->u1_tran_form8x8)
{
UWORD8 *pu1_temp;
ih264d_read_intra_pred_modes_cabac(
ps_dec,
((UWORD8 *)ps_dec->pv_parse_tu_coeff_data),
((UWORD8 *)ps_dec->pv_parse_tu_coeff_data+16),
ps_cur_mb_info->u1_tran_form8x8);
pu1_temp = (UWORD8 *)ps_dec->pv_parse_tu_coeff_data;
pu1_temp += 32;
ps_dec->pv_parse_tu_coeff_data = (void *)pu1_temp;
}
else
{
UWORD8 *pu1_temp;
ih264d_read_intra_pred_modes_cabac(
ps_dec,
((UWORD8 *)ps_dec->pv_parse_tu_coeff_data),
((UWORD8 *)ps_dec->pv_parse_tu_coeff_data+4),
ps_cur_mb_info->u1_tran_form8x8);
pu1_temp = (UWORD8 *)ps_dec->pv_parse_tu_coeff_data;
pu1_temp += 8;
ps_dec->pv_parse_tu_coeff_data = (void *)pu1_temp;
}
/*--------------------------------------------------------------------*/
/* Read the IntraPrediction mode for CHROMA */
/*--------------------------------------------------------------------*/
u1_intra_chrom_pred_mode = ih264d_parse_chroma_pred_mode_cabac(ps_dec);
COPYTHECONTEXT("intra_chroma_pred_mode", u1_intra_chrom_pred_mode);
p_curr_ctxt->u1_intra_chroma_pred_mode = ps_cur_mb_info->u1_chroma_pred_mode =
u1_intra_chrom_pred_mode;
/*--------------------------------------------------------------------*/
/* Read the Coded block pattern */
/*--------------------------------------------------------------------*/
u1_cbp = ih264d_parse_ctx_cbp_cabac(ps_dec);
COPYTHECONTEXT("coded_block_pattern", u1_cbp);
ps_cur_mb_info->u1_cbp = u1_cbp;
p_curr_ctxt->u1_cbp = u1_cbp;
/*--------------------------------------------------------------------*/
/* Read mb_qp_delta */
/*--------------------------------------------------------------------*/
if(ps_cur_mb_info->u1_cbp)
{
ret = ih264d_parse_mb_qp_delta_cabac(ps_dec, &i1_delta_qp);
if(ret != OK)
return ret;
COPYTHECONTEXT("mb_qp_delta", i1_delta_qp);
if(i1_delta_qp != 0)
{
ret = ih264d_update_qp(ps_dec, i1_delta_qp);
if(ret != OK)
return ret;
}
}
else
ps_dec->i1_prev_mb_qp_delta = 0;
p_curr_ctxt->u1_yuv_dc_csbp &= 0xFE;
}
else
{
u1_offset = 1;
ps_cur_mb_info->ps_curmb->u1_mb_type = I_16x16_MB;
p_curr_ctxt->u1_mb_type = CAB_I16x16;
ps_cur_mb_info->u1_tran_form8x8 = 0;
p_curr_ctxt->u1_transform8x8_ctxt = 0;
ps_cur_mb_info->ps_curmb->u1_tran_form8x8 = 0;
/*--------------------------------------------------------------------*/
/* Read the IntraPrediction mode for CHROMA */
/*--------------------------------------------------------------------*/
u1_intra_chrom_pred_mode = ih264d_parse_chroma_pred_mode_cabac(ps_dec);
if(u1_intra_chrom_pred_mode > 3)
return ERROR_CHROMA_PRED_MODE;
COPYTHECONTEXT("Chroma intra_chroma_pred_mode pred mode", u1_intra_chrom_pred_mode);
p_curr_ctxt->u1_intra_chroma_pred_mode = ps_cur_mb_info->u1_chroma_pred_mode =
u1_intra_chrom_pred_mode;
/*--------------------------------------------------------------------*/
/* Read the Coded block pattern */
/*--------------------------------------------------------------------*/
u1_cbp = gau1_ih264d_cbp_tab[(u1_mb_type - 1) >> 2];
ps_cur_mb_info->u1_cbp = u1_cbp;
p_curr_ctxt->u1_cbp = u1_cbp;
/*--------------------------------------------------------------------*/
/* Read mb_qp_delta */
/*--------------------------------------------------------------------*/
ret = ih264d_parse_mb_qp_delta_cabac(ps_dec, &i1_delta_qp);
if(ret != OK)
return ret;
COPYTHECONTEXT("mb_qp_delta", i1_delta_qp);
if(i1_delta_qp != 0)
{
ret = ih264d_update_qp(ps_dec, i1_delta_qp);
if(ret != OK)
return ret;
}
{
WORD16 i_scaleFactor;
WORD16* pi2_scale_matrix_ptr;
/*******************************************************************/
/* for luma DC coefficients the scaling is done during the parsing */
/* to preserve the precision */
/*******************************************************************/
if(ps_dec->s_high_profile.u1_scaling_present)
{
pi2_scale_matrix_ptr =
ps_dec->s_high_profile.i2_scalinglist4x4[0];
}
else
{
i_scaleFactor = 16;
pi2_scale_matrix_ptr = &i_scaleFactor;
}
{
ctxt_inc_mb_info_t *ps_top_ctxt = ps_dec->p_top_ctxt_mb_info;
UWORD8 uc_a, uc_b;
UWORD32 u4_ctx_inc;
INC_SYM_COUNT(&(ps_dec->s_cab_dec_env));
/* if MbAddrN not available then CondTermN = 1 */
uc_b = ((ps_top_ctxt->u1_yuv_dc_csbp) & 0x01);
/* if MbAddrN not available then CondTermN = 1 */
uc_a = ((ps_dec->pu1_left_yuv_dc_csbp[0]) & 0x01);
u4_ctx_inc = (uc_a + (uc_b << 1));
{
WORD16 pi2_dc_coef[16];
tu_sblk4x4_coeff_data_t *ps_tu_4x4 =
(tu_sblk4x4_coeff_data_t *)ps_dec->pv_parse_tu_coeff_data;
WORD16 *pi2_coeff_block =
(WORD16 *)ps_dec->pv_parse_tu_coeff_data;
p_bin_ctxt = (ps_dec->p_cbf_t[LUMA_DC_CTXCAT]) + u4_ctx_inc;
u1_dc_block_flag =
ih264d_read_coeff4x4_cabac(ps_bitstrm,
LUMA_DC_CTXCAT,
ps_dec->p_significant_coeff_flag_t[LUMA_DC_CTXCAT],
ps_dec, p_bin_ctxt);
/* Store coded_block_flag */
p_curr_ctxt->u1_yuv_dc_csbp &= 0xFE;
p_curr_ctxt->u1_yuv_dc_csbp |= u1_dc_block_flag;
if(u1_dc_block_flag)
{
WORD32 pi4_tmp[16];
memset(pi2_dc_coef,0,sizeof(pi2_dc_coef));
ih264d_unpack_coeff4x4_dc_4x4blk(ps_tu_4x4,
pi2_dc_coef,
ps_dec->pu1_inv_scan);
PROFILE_DISABLE_IQ_IT_RECON()
ps_dec->pf_ihadamard_scaling_4x4(pi2_dc_coef,
pi2_coeff_block,
ps_dec->pu2_quant_scale_y,
(UWORD16 *)pi2_scale_matrix_ptr,
ps_dec->u1_qp_y_div6,
pi4_tmp);
pi2_coeff_block += 16;
ps_dec->pv_parse_tu_coeff_data = (void *)pi2_coeff_block;
SET_BIT(ps_cur_mb_info->u1_yuv_dc_block_flag,0);
}
}
}
}
}
ps_dec->pu1_left_yuv_dc_csbp[0] &= 0x6;
ps_dec->pu1_left_yuv_dc_csbp[0] |= u1_dc_block_flag;
ih264d_parse_residual4x4_cabac(ps_dec, ps_cur_mb_info, u1_offset);
if(EXCEED_OFFSET(ps_bitstrm))
return ERROR_EOB_TERMINATE_T;
return OK;
}
/*****************************************************************************/
/* */
/* Function Name : ih264d_parse_islice_data_cavlc */
/* */
/* Description : This function parses cabac syntax of a inter slice on */
/* N MB basis. */
/* */
/* Inputs : ps_dec */
/* sliceparams */
/* firstMbInSlice */
/* */
/* Processing : 1. After parsing syntax for N MBs those N MBs are */
/* decoded till the end of slice. */
/* */
/* Returns : 0 */
/* */
/* Issues : <List any issues or problems with this function> */
/* */
/* Revision History: */
/* */
/* DD MM YYYY Author(s) Changes (Describe the changes made) */
/* 24 06 2005 ARNY Draft */
/* */
/*****************************************************************************/
WORD32 ih264d_parse_islice_data_cavlc(dec_struct_t * ps_dec,
dec_slice_params_t * ps_slice,
UWORD16 u2_first_mb_in_slice)
{
UWORD8 uc_more_data_flag;
UWORD8 u1_num_mbs, u1_mb_idx;
dec_mb_info_t *ps_cur_mb_info;
deblk_mb_t *ps_cur_deblk_mb;
dec_bit_stream_t * const ps_bitstrm = ps_dec->ps_bitstrm;
UWORD32 *pu4_bitstrm_ofst = &ps_bitstrm->u4_ofst;
UWORD32 *pu4_bitstrm_buf = ps_bitstrm->pu4_buffer;
UWORD16 i2_pic_wdin_mbs = ps_dec->u2_frm_wd_in_mbs;
WORD16 i2_cur_mb_addr;
UWORD8 u1_mbaff;
UWORD8 u1_num_mbs_next, u1_end_of_row, u1_tfr_n_mb;
WORD32 ret = OK;
ps_dec->u1_qp = ps_slice->u1_slice_qp;
ih264d_update_qp(ps_dec, 0);
u1_mbaff = ps_slice->u1_mbaff_frame_flag;
/* initializations */
u1_mb_idx = ps_dec->u1_mb_idx;
u1_num_mbs = u1_mb_idx;
uc_more_data_flag = 1;
i2_cur_mb_addr = u2_first_mb_in_slice << u1_mbaff;
do
{
UWORD8 u1_mb_type;
ps_dec->pv_prev_mb_parse_tu_coeff_data = ps_dec->pv_parse_tu_coeff_data;
if(i2_cur_mb_addr > ps_dec->ps_cur_sps->u2_max_mb_addr)
{
ret = ERROR_MB_ADDRESS_T;
break;
}
ps_cur_mb_info = ps_dec->ps_nmb_info + u1_num_mbs;
ps_dec->u4_num_mbs_cur_nmb = u1_num_mbs;
ps_dec->u4_num_pmbair = (u1_num_mbs >> u1_mbaff);
ps_cur_mb_info->u1_end_of_slice = 0;
/***************************************************************/
/* Get the required information for decoding of MB */
/* mb_x, mb_y , neighbour availablity, */
/***************************************************************/
ps_dec->pf_get_mb_info(ps_dec, i2_cur_mb_addr, ps_cur_mb_info, 0);
/***************************************************************/
/* Set the deblocking parameters for this MB */
/***************************************************************/
ps_cur_deblk_mb = ps_dec->ps_deblk_mbn + u1_num_mbs;
if(ps_dec->u4_app_disable_deblk_frm == 0)
ih264d_set_deblocking_parameters(ps_cur_deblk_mb, ps_slice,
ps_dec->u1_mb_ngbr_availablity,
ps_dec->u1_cur_mb_fld_dec_flag);
ps_cur_deblk_mb->u1_mb_type = ps_cur_deblk_mb->u1_mb_type | D_INTRA_MB;
/**************************************************************/
/* Macroblock Layer Begins, Decode the u1_mb_type */
/**************************************************************/
//Inlined ih264d_uev
{
UWORD32 u4_bitstream_offset = *pu4_bitstrm_ofst;
UWORD32 u4_word, u4_ldz, u4_temp;
/***************************************************************/
/* Find leading zeros in next 32 bits */
/***************************************************************/
NEXTBITS_32(u4_word, u4_bitstream_offset, pu4_bitstrm_buf);
u4_ldz = CLZ(u4_word);
/* Flush the ps_bitstrm */
u4_bitstream_offset += (u4_ldz + 1);
/* Read the suffix from the ps_bitstrm */
u4_word = 0;
if(u4_ldz)
GETBITS(u4_word, u4_bitstream_offset, pu4_bitstrm_buf,
u4_ldz);
*pu4_bitstrm_ofst = u4_bitstream_offset;
u4_temp = ((1 << u4_ldz) + u4_word - 1);
if(u4_temp > 25)
return ERROR_MB_TYPE;
u1_mb_type = u4_temp;
}
//Inlined ih264d_uev
ps_cur_mb_info->u1_mb_type = u1_mb_type;
COPYTHECONTEXT("u1_mb_type", u1_mb_type);
/**************************************************************/
/* Parse Macroblock data */
/**************************************************************/
if(25 == u1_mb_type)
{
/* I_PCM_MB */
ps_cur_mb_info->ps_curmb->u1_mb_type = I_PCM_MB;
ret = ih264d_parse_ipcm_mb(ps_dec, ps_cur_mb_info, u1_num_mbs);
if(ret != OK)
return ret;
ps_cur_deblk_mb->u1_mb_qp = 0;
}
else
{
ret = ih264d_parse_imb_cavlc(ps_dec, ps_cur_mb_info, u1_num_mbs, u1_mb_type);
if(ret != OK)
return ret;
ps_cur_deblk_mb->u1_mb_qp = ps_dec->u1_qp;
}
if(u1_mbaff)
{
ih264d_update_mbaff_left_nnz(ps_dec, ps_cur_mb_info);
if(!uc_more_data_flag && (0 == (i2_cur_mb_addr & 1)))
{
return ERROR_EOB_FLUSHBITS_T;
}
}
/**************************************************************/
/* Get next Macroblock address */
/**************************************************************/
i2_cur_mb_addr++;
uc_more_data_flag = MORE_RBSP_DATA(ps_bitstrm);
/* Store the colocated information */
{
mv_pred_t *ps_mv_nmb_start = ps_dec->ps_mv_cur + (u1_num_mbs << 4);
mv_pred_t s_mvPred =
{
{ 0, 0, 0, 0 },
{ -1, -1 }, 0, 0};
ih264d_rep_mv_colz(ps_dec, &s_mvPred, ps_mv_nmb_start, 0,
(UWORD8)(ps_dec->u1_cur_mb_fld_dec_flag << 1), 4,
4);
}
/*if num _cores is set to 3,compute bs will be done in another thread*/
if(ps_dec->u4_num_cores < 3)
{
if(ps_dec->u4_app_disable_deblk_frm == 0)
ps_dec->pf_compute_bs(ps_dec, ps_cur_mb_info,
(UWORD16)(u1_num_mbs >> u1_mbaff));
}
u1_num_mbs++;
/****************************************************************/
/* Check for End Of Row */
/****************************************************************/
u1_num_mbs_next = i2_pic_wdin_mbs - ps_dec->u2_mbx - 1;
u1_end_of_row = (!u1_num_mbs_next) && (!(u1_mbaff && (u1_num_mbs & 0x01)));
u1_tfr_n_mb = (u1_num_mbs == ps_dec->u1_recon_mb_grp) || u1_end_of_row
|| (!uc_more_data_flag);
ps_cur_mb_info->u1_end_of_slice = (!uc_more_data_flag);
/*H264_DEC_DEBUG_PRINT("Pic: %d Mb_X=%d Mb_Y=%d",
ps_slice->i4_poc >> ps_slice->u1_field_pic_flag,
ps_dec->u2_mbx,ps_dec->u2_mby + (1 - ps_cur_mb_info->u1_topmb));
H264_DEC_DEBUG_PRINT("u1_tfr_n_mb || (!uc_more_data_flag): %d", u1_tfr_n_mb || (!uc_more_data_flag));*/
if(u1_tfr_n_mb || (!uc_more_data_flag))
{
if(ps_dec->u1_separate_parse)
{
ih264d_parse_tfr_nmb(ps_dec, u1_mb_idx, u1_num_mbs,
u1_num_mbs_next, u1_tfr_n_mb, u1_end_of_row);
ps_dec->ps_nmb_info += u1_num_mbs;
}
else
{
ih264d_decode_recon_tfr_nmb(ps_dec, u1_mb_idx, u1_num_mbs,
u1_num_mbs_next, u1_tfr_n_mb,
u1_end_of_row);
}
ps_dec->u2_total_mbs_coded += u1_num_mbs;
if(u1_tfr_n_mb)
u1_num_mbs = 0;
u1_mb_idx = u1_num_mbs;
ps_dec->u1_mb_idx = u1_num_mbs;
}
}
while(uc_more_data_flag);
ps_dec->u4_num_mbs_cur_nmb = 0;
ps_dec->ps_cur_slice->u4_mbs_in_slice = i2_cur_mb_addr
- (u2_first_mb_in_slice << u1_mbaff);
return ret;
}
/*****************************************************************************/
/* */
/* Function Name : ih264d_parse_islice_data_cabac */
/* */
/* Description : This function parses cabac syntax of a inter slice on */
/* N MB basis. */
/* */
/* Inputs : ps_dec */
/* sliceparams */
/* firstMbInSlice */
/* */
/* Processing : 1. After parsing syntax for N MBs those N MBs are */
/* decoded till the end of slice. */
/* */
/* Returns : 0 */
/* */
/* Issues : <List any issues or problems with this function> */
/* */
/* Revision History: */
/* */
/* DD MM YYYY Author(s) Changes (Describe the changes made) */
/* 24 06 2005 ARNY Draft */
/* */
/*****************************************************************************/
WORD32 ih264d_parse_islice_data_cabac(dec_struct_t * ps_dec,
dec_slice_params_t * ps_slice,
UWORD16 u2_first_mb_in_slice)
{
UWORD8 uc_more_data_flag;
UWORD8 u1_num_mbs, u1_mb_idx;
dec_mb_info_t *ps_cur_mb_info;
deblk_mb_t *ps_cur_deblk_mb;
dec_bit_stream_t * const ps_bitstrm = ps_dec->ps_bitstrm;
UWORD16 i2_pic_wdin_mbs = ps_dec->u2_frm_wd_in_mbs;
WORD16 i2_cur_mb_addr;
UWORD8 u1_mbaff;
UWORD8 u1_num_mbs_next, u1_end_of_row, u1_tfr_n_mb;
WORD32 ret = OK;
ps_dec->u1_qp = ps_slice->u1_slice_qp;
ih264d_update_qp(ps_dec, 0);
u1_mbaff = ps_slice->u1_mbaff_frame_flag;
if(ps_bitstrm->u4_ofst & 0x07)
{
ps_bitstrm->u4_ofst += 8;
ps_bitstrm->u4_ofst &= 0xFFFFFFF8;
}
ret = ih264d_init_cabac_dec_envirnoment(&(ps_dec->s_cab_dec_env), ps_bitstrm);
if(ret != OK)
return ret;
ih264d_init_cabac_contexts(I_SLICE, ps_dec);
ps_dec->i1_prev_mb_qp_delta = 0;
/* initializations */
u1_mb_idx = ps_dec->u1_mb_idx;
u1_num_mbs = u1_mb_idx;
uc_more_data_flag = 1;
i2_cur_mb_addr = u2_first_mb_in_slice << u1_mbaff;
do
{
UWORD16 u2_mbx;
ps_dec->pv_prev_mb_parse_tu_coeff_data = ps_dec->pv_parse_tu_coeff_data;
if(i2_cur_mb_addr > ps_dec->ps_cur_sps->u2_max_mb_addr)
{
ret = ERROR_MB_ADDRESS_T;
break;
}
{
UWORD8 u1_mb_type;
ps_cur_mb_info = ps_dec->ps_nmb_info + u1_num_mbs;
ps_dec->u4_num_mbs_cur_nmb = u1_num_mbs;
ps_dec->u4_num_pmbair = (u1_num_mbs >> u1_mbaff);
ps_cur_mb_info->u1_end_of_slice = 0;
/***************************************************************/
/* Get the required information for decoding of MB */
/* mb_x, mb_y , neighbour availablity, */
/***************************************************************/
ps_dec->pf_get_mb_info(ps_dec, i2_cur_mb_addr, ps_cur_mb_info, 0);
u2_mbx = ps_dec->u2_mbx;
/*********************************************************************/
/* initialize u1_tran_form8x8 to zero to aviod uninitialized accesses */
/*********************************************************************/
ps_cur_mb_info->u1_tran_form8x8 = 0;
ps_cur_mb_info->ps_curmb->u1_tran_form8x8 = 0;
/***************************************************************/
/* Set the deblocking parameters for this MB */
/***************************************************************/
ps_cur_deblk_mb = ps_dec->ps_deblk_mbn + u1_num_mbs;
if(ps_dec->u4_app_disable_deblk_frm == 0)
ih264d_set_deblocking_parameters(
ps_cur_deblk_mb, ps_slice,
ps_dec->u1_mb_ngbr_availablity,
ps_dec->u1_cur_mb_fld_dec_flag);
ps_cur_deblk_mb->u1_mb_type = ps_cur_deblk_mb->u1_mb_type
| D_INTRA_MB;
/* Macroblock Layer Begins */
/* Decode the u1_mb_type */
u1_mb_type = ih264d_parse_mb_type_intra_cabac(0, ps_dec);
if(u1_mb_type > 25)
return ERROR_MB_TYPE;
ps_cur_mb_info->u1_mb_type = u1_mb_type;
COPYTHECONTEXT("u1_mb_type", u1_mb_type);
/* Parse Macroblock Data */
if(25 == u1_mb_type)
{
/* I_PCM_MB */
ps_cur_mb_info->ps_curmb->u1_mb_type = I_PCM_MB;
ret = ih264d_parse_ipcm_mb(ps_dec, ps_cur_mb_info, u1_num_mbs);
if(ret != OK)
return ret;
ps_cur_deblk_mb->u1_mb_qp = 0;
}
else
{
ret = ih264d_parse_imb_cabac(ps_dec, ps_cur_mb_info, u1_mb_type);
if(ret != OK)
return ret;
ps_cur_deblk_mb->u1_mb_qp = ps_dec->u1_qp;
}
if(u1_mbaff)
{
ih264d_update_mbaff_left_nnz(ps_dec, ps_cur_mb_info);
}
/* Next macroblock information */
i2_cur_mb_addr++;
if(ps_cur_mb_info->u1_topmb && u1_mbaff)
uc_more_data_flag = 1;
else
{
uc_more_data_flag = ih264d_decode_terminate(&ps_dec->s_cab_dec_env,
ps_bitstrm);
uc_more_data_flag = !uc_more_data_flag;
COPYTHECONTEXT("Decode Sliceterm",!uc_more_data_flag);
}
/* Store the colocated information */
{
mv_pred_t *ps_mv_nmb_start = ps_dec->ps_mv_cur + (u1_num_mbs << 4);
mv_pred_t s_mvPred =
{
{ 0, 0, 0, 0 },
{ -1, -1 }, 0, 0};
ih264d_rep_mv_colz(
ps_dec, &s_mvPred, ps_mv_nmb_start, 0,
(UWORD8)(ps_dec->u1_cur_mb_fld_dec_flag << 1),
4, 4);
}
/*if num _cores is set to 3,compute bs will be done in another thread*/
if(ps_dec->u4_num_cores < 3)
{
if(ps_dec->u4_app_disable_deblk_frm == 0)
ps_dec->pf_compute_bs(ps_dec, ps_cur_mb_info,
(UWORD16)(u1_num_mbs >> u1_mbaff));
}
u1_num_mbs++;
}
/****************************************************************/
/* Check for End Of Row */
/****************************************************************/
u1_num_mbs_next = i2_pic_wdin_mbs - u2_mbx - 1;
u1_end_of_row = (!u1_num_mbs_next) && (!(u1_mbaff && (u1_num_mbs & 0x01)));
u1_tfr_n_mb = (u1_num_mbs == ps_dec->u1_recon_mb_grp) || u1_end_of_row
|| (!uc_more_data_flag);
ps_cur_mb_info->u1_end_of_slice = (!uc_more_data_flag);
if(u1_tfr_n_mb || (!uc_more_data_flag))
{
if(ps_dec->u1_separate_parse)
{
ih264d_parse_tfr_nmb(ps_dec, u1_mb_idx, u1_num_mbs,
u1_num_mbs_next, u1_tfr_n_mb, u1_end_of_row);
ps_dec->ps_nmb_info += u1_num_mbs;
}
else
{
ih264d_decode_recon_tfr_nmb(ps_dec, u1_mb_idx, u1_num_mbs,
u1_num_mbs_next, u1_tfr_n_mb,
u1_end_of_row);
}
ps_dec->u2_total_mbs_coded += u1_num_mbs;
if(u1_tfr_n_mb)
u1_num_mbs = 0;
u1_mb_idx = u1_num_mbs;
ps_dec->u1_mb_idx = u1_num_mbs;
}
}
while(uc_more_data_flag);
ps_dec->u4_num_mbs_cur_nmb = 0;
ps_dec->ps_cur_slice->u4_mbs_in_slice = i2_cur_mb_addr
- (u2_first_mb_in_slice << u1_mbaff);
return ret;
}
/*****************************************************************************/
/* */
/* Function Name : ih264d_parse_ipcm_mb */
/* */
/* Description : This function decodes the pixel values of I_PCM Mb. */
/* */
/* Inputs : ps_dec, ps_cur_mb_info and mb number */
/* */
/* Description : This function reads the luma and chroma pixels directly */
/* from the bitstream when the mbtype is I_PCM and stores */
/* them in recon buffer. If the entropy coding mode is */
/* cabac, decoding engine is re-initialized. The nnzs and */
/* cabac contexts are appropriately modified. */
/* Returns : void */
/* */
/* Revision History: */
/* DD MM YYYY Author(s) Changes (Describe the changes made) */
/* 13 07 2002 Jay */
/* */
/*****************************************************************************/
WORD32 ih264d_parse_ipcm_mb(dec_struct_t * ps_dec,
dec_mb_info_t *ps_cur_mb_info,
UWORD8 u1_mbNum)
{
dec_bit_stream_t * const ps_bitstrm = ps_dec->ps_bitstrm;
UWORD8 u1_mbaff = ps_dec->ps_cur_slice->u1_mbaff_frame_flag;
UWORD8 *pu1_y, *pu1_u, *pu1_v;
WORD32 ret;
UWORD32 u4_rec_width_y, u4_rec_width_uv;
UWORD32 u1_num_mb_pair;
UWORD8 u1_x, u1_y;
/* CHANGED CODE */
tfr_ctxt_t *ps_frame_buf;
UWORD8 u1_mb_field_decoding_flag;
UWORD32 *pu4_buf;
UWORD8 *pu1_buf;
/* CHANGED CODE */
if(ps_dec->u1_separate_parse)
{
ps_frame_buf = &ps_dec->s_tran_addrecon_parse;
}
else
{
ps_frame_buf = &ps_dec->s_tran_addrecon;
}
/* align bistream to byte boundary. */
/* pcm_alignment_zero_bit discarded */
/* For XX GotoByteBoundary */
if(ps_bitstrm->u4_ofst & 0x07)
{
ps_bitstrm->u4_ofst += 8;
ps_bitstrm->u4_ofst &= 0xFFFFFFF8;
}
/* Store left Nnz as 16 for each 4x4 blk */
pu1_buf = ps_dec->pu1_left_nnz_y;
pu4_buf = (UWORD32 *)pu1_buf;
*pu4_buf = 0x10101010;
pu1_buf = ps_cur_mb_info->ps_curmb->pu1_nnz_y;
pu4_buf = (UWORD32 *)pu1_buf;
*pu4_buf = 0x10101010;
pu1_buf = ps_cur_mb_info->ps_curmb->pu1_nnz_uv;
pu4_buf = (UWORD32 *)pu1_buf;
*pu4_buf = 0x10101010;
pu1_buf = ps_dec->pu1_left_nnz_uv;
pu4_buf = (UWORD32 *)pu1_buf;
*pu4_buf = 0x10101010;
ps_cur_mb_info->u1_cbp = 0xff;
ps_dec->i1_prev_mb_qp_delta = 0;
/* Get neighbour MB's */
u1_num_mb_pair = (u1_mbNum >> u1_mbaff);
/*****************************************************************************/
/* calculate the RECON buffer YUV pointers for the PCM data */
/*****************************************************************************/
/* CHANGED CODE */
u1_mb_field_decoding_flag = ps_cur_mb_info->u1_mb_field_decodingflag;
pu1_y = ps_frame_buf->pu1_dest_y + (u1_num_mb_pair << 4);
pu1_u = ps_frame_buf->pu1_dest_u + (u1_num_mb_pair << 4);
pu1_v = pu1_u + 1;
u4_rec_width_y = ps_dec->u2_frm_wd_y << u1_mb_field_decoding_flag;
u4_rec_width_uv = ps_dec->u2_frm_wd_uv << u1_mb_field_decoding_flag;
/* CHANGED CODE */
if(u1_mbaff)
{
UWORD8 u1_top_mb;
u1_top_mb = ps_cur_mb_info->u1_topmb;
if(u1_top_mb == 0)
{
pu1_y += (u1_mb_field_decoding_flag ?
(u4_rec_width_y >> 1) : (u4_rec_width_y << 4));
pu1_u += (u1_mb_field_decoding_flag ?
(u4_rec_width_uv) : (u4_rec_width_uv << 4));
pu1_v = pu1_u + 1;
}
}
/* Read Luma samples */
for(u1_y = 0; u1_y < 16; u1_y++)
{
for(u1_x = 0; u1_x < 16; u1_x++)
pu1_y[u1_x] = ih264d_get_bits_h264(ps_bitstrm, 8);
pu1_y += u4_rec_width_y;
}
/* Read Chroma samples */
for(u1_y = 0; u1_y < 8; u1_y++)
{
for(u1_x = 0; u1_x < 8; u1_x++)
pu1_u[u1_x * YUV420SP_FACTOR] = ih264d_get_bits_h264(ps_bitstrm, 8);
pu1_u += u4_rec_width_uv;
}
for(u1_y = 0; u1_y < 8; u1_y++)
{
for(u1_x = 0; u1_x < 8; u1_x++)
pu1_v[u1_x * YUV420SP_FACTOR] = ih264d_get_bits_h264(ps_bitstrm, 8);
pu1_v += u4_rec_width_uv;
}
if(CABAC == ps_dec->ps_cur_pps->u1_entropy_coding_mode)
{
UWORD32 *pu4_buf;
UWORD8 *pu1_buf;
ctxt_inc_mb_info_t *p_curr_ctxt = ps_dec->ps_curr_ctxt_mb_info;
/* Re-initialize the cabac decoding engine. */
ret = ih264d_init_cabac_dec_envirnoment(&(ps_dec->s_cab_dec_env), ps_bitstrm);
if(ret != OK)
return ret;
/* update the cabac contetxs */
p_curr_ctxt->u1_mb_type = CAB_I_PCM;
p_curr_ctxt->u1_cbp = 47;
p_curr_ctxt->u1_intra_chroma_pred_mode = 0;
p_curr_ctxt->u1_transform8x8_ctxt = 0;
ps_cur_mb_info->ps_curmb->u1_tran_form8x8 = 0;
pu1_buf = ps_dec->pu1_left_nnz_y;
pu4_buf = (UWORD32 *)pu1_buf;
*pu4_buf = 0x01010101;
pu1_buf = ps_cur_mb_info->ps_curmb->pu1_nnz_y;
pu4_buf = (UWORD32 *)pu1_buf;
*pu4_buf = 0x01010101;
pu1_buf = ps_cur_mb_info->ps_curmb->pu1_nnz_uv;
pu4_buf = (UWORD32 *)pu1_buf;
*pu4_buf = 0x01010101;
pu1_buf = ps_dec->pu1_left_nnz_uv;
pu4_buf = (UWORD32 *)pu1_buf;
*pu4_buf = 0x01010101;
p_curr_ctxt->u1_yuv_dc_csbp = 0x7;
ps_dec->pu1_left_yuv_dc_csbp[0] = 0x7;
if(ps_dec->ps_cur_slice->u1_slice_type != I_SLICE)
{
MEMSET_16BYTES(&ps_dec->pu1_left_mv_ctxt_inc[0][0], 0);
memset(ps_dec->pi1_left_ref_idx_ctxt_inc, 0, 4);
MEMSET_16BYTES(p_curr_ctxt->u1_mv, 0);
memset(p_curr_ctxt->i1_ref_idx, 0, 4);
}
}
return OK;
}
/*!
**************************************************************************
* \if Function name : ih264d_decode_islice \endif
*
* \brief
* Decodes an I Slice
*
*
* \return
* 0 on Success and Error code otherwise
**************************************************************************
*/
WORD32 ih264d_parse_islice(dec_struct_t *ps_dec,
UWORD16 u2_first_mb_in_slice)
{
dec_pic_params_t * ps_pps = ps_dec->ps_cur_pps;
dec_slice_params_t * ps_slice = ps_dec->ps_cur_slice;
UWORD32 *pu4_bitstrm_buf = ps_dec->ps_bitstrm->pu4_buffer;
UWORD32 *pu4_bitstrm_ofst = &ps_dec->ps_bitstrm->u4_ofst;
UWORD32 u4_temp;
WORD32 i_temp;
WORD32 ret;
/*--------------------------------------------------------------------*/
/* Read remaining contents of the slice header */
/*--------------------------------------------------------------------*/
/* dec_ref_pic_marking function */
/* G050 */
if(ps_slice->u1_nal_ref_idc != 0)
{
if(!ps_dec->ps_dpb_cmds->u1_dpb_commands_read)
{
i_temp = ih264d_read_mmco_commands(ps_dec);
if (i_temp < 0)
{
return ERROR_DBP_MANAGER_T;
}
ps_dec->u4_bitoffset = i_temp;
}
else
ps_dec->ps_bitstrm->u4_ofst += ps_dec->u4_bitoffset;
}
/* G050 */
/* Read slice_qp_delta */
i_temp = ps_pps->u1_pic_init_qp
+ ih264d_sev(pu4_bitstrm_ofst, pu4_bitstrm_buf);
if((i_temp < 0) || (i_temp > 51))
return ERROR_INV_RANGE_QP_T;
ps_slice->u1_slice_qp = i_temp;
COPYTHECONTEXT("SH: slice_qp_delta",
ps_slice->u1_slice_qp - ps_pps->u1_pic_init_qp);
if(ps_pps->u1_deblocking_filter_parameters_present_flag == 1)
{
u4_temp = ih264d_uev(pu4_bitstrm_ofst, pu4_bitstrm_buf);
COPYTHECONTEXT("SH: disable_deblocking_filter_idc", u4_temp);
if(u4_temp > SLICE_BOUNDARY_DBLK_DISABLED)
{
return ERROR_INV_SLICE_HDR_T;
}
ps_slice->u1_disable_dblk_filter_idc = u4_temp;
if(u4_temp != 1)
{
i_temp = ih264d_sev(pu4_bitstrm_ofst, pu4_bitstrm_buf)
<< 1;
if((MIN_DBLK_FIL_OFF > i_temp) || (i_temp > MAX_DBLK_FIL_OFF))
{
return ERROR_INV_SLICE_HDR_T;
}
ps_slice->i1_slice_alpha_c0_offset = i_temp;
COPYTHECONTEXT("SH: slice_alpha_c0_offset_div2",
ps_slice->i1_slice_alpha_c0_offset >> 1);
i_temp = ih264d_sev(pu4_bitstrm_ofst, pu4_bitstrm_buf)
<< 1;
if((MIN_DBLK_FIL_OFF > i_temp) || (i_temp > MAX_DBLK_FIL_OFF))
{
return ERROR_INV_SLICE_HDR_T;
}
ps_slice->i1_slice_beta_offset = i_temp;
COPYTHECONTEXT("SH: slice_beta_offset_div2",
ps_slice->i1_slice_beta_offset >> 1);
}
else
{
ps_slice->i1_slice_alpha_c0_offset = 0;
ps_slice->i1_slice_beta_offset = 0;
}
}
else
{
ps_slice->u1_disable_dblk_filter_idc = 0;
ps_slice->i1_slice_alpha_c0_offset = 0;
ps_slice->i1_slice_beta_offset = 0;
}
/* Initialization to check if number of motion vector per 2 Mbs */
/* are exceeding the range or not */
ps_dec->u2_mv_2mb[0] = 0;
ps_dec->u2_mv_2mb[1] = 0;
/*set slice header cone to 2 ,to indicate correct header*/
ps_dec->u1_slice_header_done = 2;
if(ps_pps->u1_entropy_coding_mode)
{
SWITCHOFFTRACE; SWITCHONTRACECABAC;
if(ps_dec->ps_cur_slice->u1_mbaff_frame_flag)
{
ps_dec->pf_get_mb_info = ih264d_get_mb_info_cabac_mbaff;
}
else
ps_dec->pf_get_mb_info = ih264d_get_mb_info_cabac_nonmbaff;
ret = ih264d_parse_islice_data_cabac(ps_dec, ps_slice,
u2_first_mb_in_slice);
if(ret != OK)
return ret;
SWITCHONTRACE; SWITCHOFFTRACECABAC;
}
else
{
if(ps_dec->ps_cur_slice->u1_mbaff_frame_flag)
{
ps_dec->pf_get_mb_info = ih264d_get_mb_info_cavlc_mbaff;
}
else
ps_dec->pf_get_mb_info = ih264d_get_mb_info_cavlc_nonmbaff;
ret = ih264d_parse_islice_data_cavlc(ps_dec, ps_slice,
u2_first_mb_in_slice);
if(ret != OK)
return ret;
}
return OK;
}
Reference in a new issue View git blame Copy permalink