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1607 lines
62 KiB
1607 lines
62 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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/*! |
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*************************************************************************** |
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* \file ih264d_parse_cabac.c |
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* |
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* \brief |
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* This file contains cabac Residual decoding routines. |
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* |
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* \date |
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* 20/03/2003 |
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* |
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* \author NS |
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*************************************************************************** |
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*/ |
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#include "ih264_typedefs.h" |
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#include "ih264_macros.h" |
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#include "ih264_platform_macros.h" |
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#include "ih264d_defs.h" |
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#include "ih264d_structs.h" |
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|
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#include "ih264d_cabac.h" |
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#include "ih264d_bitstrm.h" |
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#include "ih264d_parse_mb_header.h" |
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#include "ih264d_debug.h" |
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#include "ih264d_tables.h" |
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#include "ih264d_error_handler.h" |
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#include "ih264d_parse_cabac.h" |
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#include "ih264d_parse_slice.h" |
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#include "ih264d_tables.h" |
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#include "ih264d_mb_utils.h" |
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#include "ih264d_utils.h" |
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/*! |
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******************************************************************************** |
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* \if Function name : ih264d_read_coeff4x4_cabac \endif |
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* |
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* \brief This function encodes residual_block_cabac as defined in 7.3.5.3.2. |
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* |
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* \return |
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* Returns the index of last significant coeff. |
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* |
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******************************************************************************** |
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*/ |
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UWORD8 ih264d_read_coeff4x4_cabac(dec_bit_stream_t *ps_bitstrm, |
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UWORD32 u4_ctxcat, |
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bin_ctxt_model_t *ps_ctxt_sig_coeff, |
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dec_struct_t *ps_dec, /*!< pointer to access global variables*/ |
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bin_ctxt_model_t *ps_ctxt_coded) |
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{ |
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decoding_envirnoment_t *ps_cab_env = &ps_dec->s_cab_dec_env; |
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UWORD32 u4_coded_flag; |
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UWORD32 u4_offset, *pu4_buffer; |
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UWORD32 u4_code_int_range, u4_code_int_val_ofst; |
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tu_sblk4x4_coeff_data_t *ps_tu_4x4; |
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WORD16 *pi2_coeff_data; |
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WORD32 num_sig_coeffs = 0; |
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/*loading from strcuctures*/ |
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ps_tu_4x4 = (tu_sblk4x4_coeff_data_t *)ps_dec->pv_parse_tu_coeff_data; |
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ps_tu_4x4->u2_sig_coeff_map = 0; |
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pi2_coeff_data = &ps_tu_4x4->ai2_level[0]; |
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u4_offset = ps_bitstrm->u4_ofst; |
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pu4_buffer = ps_bitstrm->pu4_buffer; |
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u4_code_int_range = ps_cab_env->u4_code_int_range; |
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u4_code_int_val_ofst = ps_cab_env->u4_code_int_val_ofst; |
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{ |
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/*inilined DecodeDecision_onebin begins*/ |
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{ |
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UWORD32 u4_qnt_int_range, u4_int_range_lps; |
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UWORD32 u4_symbol, u1_mps_state; |
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UWORD32 table_lookup; |
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const UWORD32 *pu4_table = (const UWORD32 *)ps_cab_env->cabac_table; |
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UWORD32 u4_clz; |
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u1_mps_state = (ps_ctxt_coded->u1_mps_state); |
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u4_clz = CLZ(u4_code_int_range); |
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u4_qnt_int_range = u4_code_int_range << u4_clz; |
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u4_qnt_int_range = (u4_qnt_int_range >> 29) & 0x3; |
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table_lookup = |
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pu4_table[(u1_mps_state << 2) + u4_qnt_int_range]; |
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u4_int_range_lps = table_lookup & 0xff; |
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u4_int_range_lps = u4_int_range_lps << (23 - u4_clz); |
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u4_code_int_range = u4_code_int_range - u4_int_range_lps; |
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u4_symbol = ((u1_mps_state >> 6) & 0x1); |
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u1_mps_state = (table_lookup >> 8) & 0x7F; |
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CHECK_IF_LPS(u4_code_int_range, u4_code_int_val_ofst, u4_symbol, |
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u4_int_range_lps, u1_mps_state, table_lookup) |
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if(u4_code_int_range < ONE_RIGHT_SHIFTED_BY_8) |
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{ |
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RENORM_RANGE_OFFSET(u4_code_int_range, u4_code_int_val_ofst, |
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u4_offset, pu4_buffer) |
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} |
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ps_ctxt_coded->u1_mps_state = u1_mps_state; |
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u4_coded_flag = u4_symbol; |
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/*inilined DecodeDecision_onebin ends*/ |
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} |
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} |
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if(u4_coded_flag) |
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{ |
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{ |
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bin_ctxt_model_t *p_binCtxt_last, *p_binCtxt_last_org; |
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UWORD32 uc_last_coeff_idx; |
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UWORD32 uc_bin; |
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UWORD32 i; |
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WORD32 first_coeff_offset = 0; |
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if((u4_ctxcat == CHROMA_AC_CTXCAT) || (u4_ctxcat == LUMA_AC_CTXCAT)) |
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{ |
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first_coeff_offset = 1; |
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} |
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i = 0; |
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if(u4_ctxcat == CHROMA_DC_CTXCAT) |
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{ |
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uc_last_coeff_idx = 3; |
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} |
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else |
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{ |
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UWORD32 u4_start; |
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u4_start = (u4_ctxcat & 1) + (u4_ctxcat >> 2); |
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uc_last_coeff_idx = 15 - u4_start; |
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} |
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p_binCtxt_last_org = ps_ctxt_sig_coeff |
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+ LAST_COEFF_CTXT_MINUS_SIG_COEFF_CTXT; |
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do |
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{ |
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/*inilined DecodeDecision_onebin begins*/ |
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{ |
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UWORD32 u4_qnt_int_range, u4_int_range_lps; |
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UWORD32 u4_symbol, u1_mps_state; |
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UWORD32 table_lookup; |
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const UWORD32 *pu4_table = |
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(const UWORD32 *)ps_cab_env->cabac_table; |
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UWORD32 u4_clz; |
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u1_mps_state = (ps_ctxt_sig_coeff->u1_mps_state); |
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u4_clz = CLZ(u4_code_int_range); |
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u4_qnt_int_range = u4_code_int_range << u4_clz; |
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u4_qnt_int_range = (u4_qnt_int_range >> 29) & 0x3; |
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table_lookup = pu4_table[(u1_mps_state << 2) |
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+ u4_qnt_int_range]; |
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u4_int_range_lps = table_lookup & 0xff; |
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u4_int_range_lps = u4_int_range_lps << (23 - u4_clz); |
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u4_code_int_range = u4_code_int_range - u4_int_range_lps; |
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u4_symbol = ((u1_mps_state >> 6) & 0x1); |
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u1_mps_state = (table_lookup >> 8) & 0x7F; |
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CHECK_IF_LPS(u4_code_int_range, u4_code_int_val_ofst, |
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u4_symbol, u4_int_range_lps, u1_mps_state, |
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table_lookup) |
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if(u4_code_int_range < ONE_RIGHT_SHIFTED_BY_14) |
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{ |
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UWORD32 read_bits, u4_clz; |
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u4_clz = CLZ(u4_code_int_range); |
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NEXTBITS(read_bits, (u4_offset + 23), pu4_buffer, |
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u4_clz) |
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FLUSHBITS(u4_offset, (u4_clz)) |
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u4_code_int_range = u4_code_int_range << u4_clz; |
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u4_code_int_val_ofst = (u4_code_int_val_ofst << u4_clz) |
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| read_bits; |
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} |
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INC_BIN_COUNT( |
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ps_cab_env) |
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ps_ctxt_sig_coeff->u1_mps_state = u1_mps_state; |
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uc_bin = u4_symbol; |
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} |
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/*incrementing pointer to point to the context of the next bin*/ |
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ps_ctxt_sig_coeff++; |
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/*inilined DecodeDecision_onebin ends*/ |
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if(uc_bin) |
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{ |
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num_sig_coeffs++; |
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SET_BIT(ps_tu_4x4->u2_sig_coeff_map, (i + first_coeff_offset)); |
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p_binCtxt_last = p_binCtxt_last_org + i; |
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/*inilined DecodeDecision_onebin begins*/ |
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{ |
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UWORD32 u4_qnt_int_range, u4_int_range_lps; |
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UWORD32 u4_symbol, u1_mps_state; |
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UWORD32 table_lookup; |
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const UWORD32 *pu4_table = |
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(const UWORD32 *)ps_cab_env->cabac_table; |
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UWORD32 u4_clz; |
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u1_mps_state = (p_binCtxt_last->u1_mps_state); |
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u4_clz = CLZ(u4_code_int_range); |
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u4_qnt_int_range = u4_code_int_range << u4_clz; |
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u4_qnt_int_range = (u4_qnt_int_range >> 29) |
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& 0x3; |
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table_lookup = pu4_table[(u1_mps_state << 2) |
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+ u4_qnt_int_range]; |
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u4_int_range_lps = table_lookup & 0xff; |
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u4_int_range_lps = u4_int_range_lps |
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<< (23 - u4_clz); |
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u4_code_int_range = u4_code_int_range |
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- u4_int_range_lps; |
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u4_symbol = ((u1_mps_state >> 6) & 0x1); |
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u1_mps_state = (table_lookup >> 8) & 0x7F; |
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CHECK_IF_LPS(u4_code_int_range, u4_code_int_val_ofst, |
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u4_symbol, u4_int_range_lps, |
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u1_mps_state, table_lookup) |
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INC_BIN_COUNT(ps_cab_env) |
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p_binCtxt_last->u1_mps_state = u1_mps_state; |
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uc_bin = u4_symbol; |
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} |
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/*inilined DecodeDecision_onebin ends*/ |
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if(uc_bin == 1) |
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goto label_read_levels; |
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} |
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i = i + 1; |
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} |
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while(i < uc_last_coeff_idx); |
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num_sig_coeffs++; |
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SET_BIT(ps_tu_4x4->u2_sig_coeff_map, (i + first_coeff_offset)); |
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label_read_levels: ; |
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} |
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/// VALUE of No of Coeff in BLOCK = i + 1 for second case else i; |
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/* Decode coeff_abs_level_minus1 and coeff_sign_flag */ |
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{ |
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WORD32 i2_abs_lvl; |
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UWORD32 u1_abs_level_equal1 = 1, u1_abs_level_gt1 = 0; |
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UWORD32 u4_ctx_inc; |
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UWORD32 ui_prefix; |
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bin_ctxt_model_t *p_ctxt_abs_level; |
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p_ctxt_abs_level = ps_dec->p_coeff_abs_level_minus1_t[u4_ctxcat]; |
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u4_ctx_inc = ((0x51)); |
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/*****************************************************/ |
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/* Main Loop runs for no. of Significant coefficient */ |
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/*****************************************************/ |
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do |
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{ |
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|
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{ |
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INC_SYM_COUNT(&(ps_dec.s_cab_dec_env)); |
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/*****************************************************/ |
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/* inilining a modified ih264d_decode_bins_unary */ |
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/*****************************************************/ |
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|
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{ |
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UWORD32 u4_value; |
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UWORD32 u4_symbol; |
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bin_ctxt_model_t *ps_bin_ctxt; |
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UWORD32 u4_ctx_Inc; |
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u4_value = 0; |
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u4_ctx_Inc = u4_ctx_inc & 0xf; |
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ps_bin_ctxt = p_ctxt_abs_level + u4_ctx_Inc; |
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do |
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{ |
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|
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{ |
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UWORD32 u4_qnt_int_range, |
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u4_int_range_lps; |
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UWORD32 u1_mps_state; |
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UWORD32 table_lookup; |
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const UWORD32 *pu4_table = |
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(const UWORD32 *)ps_cab_env->cabac_table; |
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UWORD32 u4_clz; |
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u1_mps_state = (ps_bin_ctxt->u1_mps_state); |
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u4_clz = CLZ(u4_code_int_range); |
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u4_qnt_int_range = u4_code_int_range |
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<< u4_clz; |
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u4_qnt_int_range = (u4_qnt_int_range |
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>> 29) & 0x3; |
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table_lookup = pu4_table[(u1_mps_state << 2) |
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+ u4_qnt_int_range]; |
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u4_int_range_lps = table_lookup & 0xff; |
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|
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u4_int_range_lps = u4_int_range_lps |
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<< (23 - u4_clz); |
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u4_code_int_range = u4_code_int_range |
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- u4_int_range_lps; |
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u4_symbol = ((u1_mps_state >> 6) & 0x1); |
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u1_mps_state = (table_lookup >> 8) & 0x7F; |
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|
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CHECK_IF_LPS(u4_code_int_range, |
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u4_code_int_val_ofst, u4_symbol, |
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u4_int_range_lps, u1_mps_state, |
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table_lookup) |
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|
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if(u4_code_int_range < ONE_RIGHT_SHIFTED_BY_9) |
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{ |
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|
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RENORM_RANGE_OFFSET(u4_code_int_range, |
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u4_code_int_val_ofst, |
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u4_offset, pu4_buffer) |
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} |
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INC_BIN_COUNT(ps_cab_env); |
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ps_bin_ctxt->u1_mps_state = u1_mps_state; |
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} |
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INC_BIN_COUNT(ps_cab_env);INC_DECISION_BINS(ps_cab_env); |
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u4_value++; |
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ps_bin_ctxt = p_ctxt_abs_level + (u4_ctx_inc >> 4); |
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|
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} |
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while(u4_symbol && (u4_value < UCOFF_LEVEL)); |
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ui_prefix = u4_value - 1 + u4_symbol; |
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|
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} |
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if(ui_prefix == UCOFF_LEVEL) |
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{ |
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UWORD32 ui16_sufS = 0; |
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UWORD32 u1_max_bins; |
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UWORD32 u4_value; |
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|
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i2_abs_lvl = UCOFF_LEVEL; |
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/*inlining ih264d_decode_bypass_bins_unary begins*/ |
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|
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{ |
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UWORD32 uc_bin; |
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UWORD32 bits_to_flush; |
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UWORD32 max_bits = 32; |
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|
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bits_to_flush = 0; |
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/*renormalize to ensure there 23 bits more in the u4_code_int_val_ofst*/ |
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{ |
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UWORD32 u4_clz, read_bits; |
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|
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u4_clz = CLZ(u4_code_int_range); |
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FLUSHBITS(u4_offset, u4_clz) |
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NEXTBITS(read_bits, u4_offset, pu4_buffer, 23) |
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u4_code_int_range = u4_code_int_range << u4_clz; |
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u4_code_int_val_ofst = (u4_code_int_val_ofst |
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<< u4_clz) | read_bits; |
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|
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} |
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|
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do |
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{ |
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bits_to_flush++; |
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|
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u4_code_int_range = u4_code_int_range >> 1; |
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|
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if(u4_code_int_val_ofst >= u4_code_int_range) |
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{ |
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/* S=1 */ |
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uc_bin = 1; |
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u4_code_int_val_ofst -= u4_code_int_range; |
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} |
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else |
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{ |
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/* S=0 */ |
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uc_bin = 0; |
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} |
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|
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INC_BIN_COUNT( |
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ps_cab_env);INC_BYPASS_BINS(ps_cab_env); |
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|
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} |
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while(uc_bin && (bits_to_flush < max_bits)); |
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|
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u4_value = (bits_to_flush - 1); |
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|
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} |
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/*inlining ih264d_decode_bypass_bins_unary ends*/ |
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|
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ui16_sufS = (1 << u4_value); |
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u1_max_bins = u4_value; |
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|
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if(u4_value > 0) |
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{ |
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|
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/*inline bypassbins_flc begins*/ |
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|
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if(u4_value > 10) |
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{ |
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UWORD32 u4_clz, read_bits; |
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|
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u4_clz = CLZ(u4_code_int_range); |
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FLUSHBITS(u4_offset, u4_clz) |
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NEXTBITS(read_bits, u4_offset, pu4_buffer, 23) |
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u4_code_int_range = u4_code_int_range << u4_clz; |
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u4_code_int_val_ofst = (u4_code_int_val_ofst |
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<< u4_clz) | read_bits; |
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} |
|
|
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{ |
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UWORD32 ui_bins; |
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UWORD32 uc_bin; |
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UWORD32 bits_to_flush; |
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|
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ui_bins = 0; |
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bits_to_flush = 0; |
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|
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do |
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{ |
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bits_to_flush++; |
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|
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u4_code_int_range = u4_code_int_range >> 1; |
|
|
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if(u4_code_int_val_ofst |
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>= u4_code_int_range) |
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{ |
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/* S=1 */ |
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uc_bin = 1; |
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u4_code_int_val_ofst -= |
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u4_code_int_range; |
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} |
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else |
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{ |
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/* S=0 */ |
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uc_bin = 0; |
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} |
|
|
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INC_BIN_COUNT( |
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ps_cab_env);INC_BYPASS_BINS(ps_cab_env); |
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|
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ui_bins = ((ui_bins << 1) | uc_bin); |
|
|
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} |
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while(bits_to_flush < u1_max_bins); |
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|
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u4_value = ui_bins; |
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} |
|
|
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/*inline bypassbins_flc ends*/ |
|
|
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} |
|
|
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//Value of K |
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ui16_sufS += u4_value; |
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i2_abs_lvl += ui16_sufS; |
|
|
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} |
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else |
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i2_abs_lvl = 1 + ui_prefix; |
|
|
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if(i2_abs_lvl > 1) |
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{ |
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u1_abs_level_gt1++; |
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} |
|
if(!u1_abs_level_gt1) |
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{ |
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u1_abs_level_equal1++; |
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u4_ctx_inc = (5 << 4) + MIN(u1_abs_level_equal1, 4); |
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} |
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else |
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u4_ctx_inc = (5 + MIN(u1_abs_level_gt1, 4)) << 4; |
|
|
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/*u4_ctx_inc = g_table_temp[u1_abs_level_gt1][u1_abs_level_equal1];*/ |
|
|
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/* encode coeff_sign_flag[i] */ |
|
|
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{ |
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u4_code_int_range = u4_code_int_range >> 1; |
|
|
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if(u4_code_int_val_ofst >= (u4_code_int_range)) |
|
{ |
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/* S=1 */ |
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u4_code_int_val_ofst -= u4_code_int_range; |
|
i2_abs_lvl = (-i2_abs_lvl); |
|
} |
|
|
|
} |
|
num_sig_coeffs--; |
|
*pi2_coeff_data++ = i2_abs_lvl; |
|
} |
|
} |
|
while(num_sig_coeffs > 0); |
|
} |
|
} |
|
|
|
if(u4_coded_flag) |
|
{ |
|
WORD32 offset; |
|
offset = (UWORD8 *)pi2_coeff_data - (UWORD8 *)ps_tu_4x4; |
|
offset = ALIGN4(offset); |
|
ps_dec->pv_parse_tu_coeff_data = (void *)((UWORD8 *)ps_dec->pv_parse_tu_coeff_data + offset); |
|
} |
|
|
|
|
|
/*updating structures*/ |
|
ps_cab_env->u4_code_int_val_ofst = u4_code_int_val_ofst; |
|
ps_cab_env->u4_code_int_range = u4_code_int_range; |
|
ps_bitstrm->u4_ofst = u4_offset; |
|
return (u4_coded_flag); |
|
} |
|
/*! |
|
******************************************************************************** |
|
* \if Function name : ih264d_read_coeff8x8_cabac \endif |
|
* |
|
* \brief This function encodes residual_block_cabac as defined in 7.3.5.3.2. |
|
when transform_8x8_flag = 1 |
|
* |
|
* \return |
|
* Returns the index of last significant coeff. |
|
* |
|
******************************************************************************** |
|
*/ |
|
|
|
void ih264d_read_coeff8x8_cabac(dec_bit_stream_t *ps_bitstrm, |
|
dec_struct_t *ps_dec, /*!< pointer to access global variables*/ |
|
dec_mb_info_t *ps_cur_mb_info) |
|
{ |
|
decoding_envirnoment_t *ps_cab_env = &ps_dec->s_cab_dec_env; |
|
UWORD32 u4_offset, *pu4_buffer; |
|
UWORD32 u4_code_int_range, u4_code_int_val_ofst; |
|
|
|
/* High profile related declarations */ |
|
UWORD8 u1_field_coding_flag = ps_cur_mb_info->ps_curmb->u1_mb_fld; |
|
const UWORD8 *pu1_lastcoeff_context_inc = |
|
(UWORD8 *)gau1_ih264d_lastcoeff_context_inc; |
|
const UWORD8 *pu1_sigcoeff_context_inc; |
|
bin_ctxt_model_t *ps_ctxt_sig_coeff; |
|
WORD32 num_sig_coeffs = 0; |
|
tu_blk8x8_coeff_data_t *ps_tu_8x8; |
|
WORD16 *pi2_coeff_data; |
|
|
|
/*loading from strcuctures*/ |
|
|
|
ps_tu_8x8 = (tu_blk8x8_coeff_data_t *)ps_dec->pv_parse_tu_coeff_data; |
|
ps_tu_8x8->au4_sig_coeff_map[0] = 0; |
|
ps_tu_8x8->au4_sig_coeff_map[1] = 0; |
|
pi2_coeff_data = &ps_tu_8x8->ai2_level[0]; |
|
|
|
|
|
if(!u1_field_coding_flag) |
|
{ |
|
pu1_sigcoeff_context_inc = |
|
(UWORD8 *)gau1_ih264d_sigcoeff_context_inc_frame; |
|
|
|
/*******************************************************************/ |
|
/* last coefficient context is derived from significant coeff u4_flag */ |
|
/* only significant coefficient matrix need to be initialized */ |
|
/*******************************************************************/ |
|
ps_ctxt_sig_coeff = ps_dec->s_high_profile.ps_sigcoeff_8x8_frame; |
|
} |
|
else |
|
{ |
|
pu1_sigcoeff_context_inc = |
|
(UWORD8 *)gau1_ih264d_sigcoeff_context_inc_field; |
|
|
|
/*******************************************************************/ |
|
/* last coefficient context is derived from significant coeff u4_flag */ |
|
/* only significant coefficient matrix need to be initialized */ |
|
/*******************************************************************/ |
|
ps_ctxt_sig_coeff = ps_dec->s_high_profile.ps_sigcoeff_8x8_field; |
|
} |
|
|
|
/*loading from strcuctures*/ |
|
|
|
u4_offset = ps_bitstrm->u4_ofst; |
|
pu4_buffer = ps_bitstrm->pu4_buffer; |
|
|
|
u4_code_int_range = ps_cab_env->u4_code_int_range; |
|
u4_code_int_val_ofst = ps_cab_env->u4_code_int_val_ofst; |
|
|
|
{ |
|
{ |
|
bin_ctxt_model_t *p_binCtxt_last, *p_binCtxt_last_org, |
|
*p_ctxt_sig_coeff_org; |
|
UWORD32 uc_last_coeff_idx; |
|
UWORD32 uc_bin; |
|
UWORD32 i; |
|
|
|
i = 0; |
|
|
|
uc_last_coeff_idx = 63; |
|
|
|
p_binCtxt_last_org = ps_ctxt_sig_coeff |
|
+ LAST_COEFF_CTXT_MINUS_SIG_COEFF_CTXT_8X8; |
|
|
|
p_ctxt_sig_coeff_org = ps_ctxt_sig_coeff; |
|
|
|
do |
|
{ |
|
/*inilined DecodeDecision_onebin begins*/ |
|
{ |
|
UWORD32 u4_qnt_int_range, u4_int_range_lps; |
|
UWORD32 u4_symbol, u1_mps_state; |
|
UWORD32 table_lookup; |
|
const UWORD32 *pu4_table = |
|
(const UWORD32 *)ps_cab_env->cabac_table; |
|
UWORD32 u4_clz; |
|
|
|
u1_mps_state = (ps_ctxt_sig_coeff->u1_mps_state); |
|
|
|
u4_clz = CLZ(u4_code_int_range); |
|
|
|
u4_qnt_int_range = u4_code_int_range << u4_clz; |
|
u4_qnt_int_range = (u4_qnt_int_range >> 29) & 0x3; |
|
|
|
table_lookup = pu4_table[(u1_mps_state << 2) |
|
+ u4_qnt_int_range]; |
|
|
|
u4_int_range_lps = table_lookup & 0xff; |
|
|
|
u4_int_range_lps = u4_int_range_lps << (23 - u4_clz); |
|
u4_code_int_range = u4_code_int_range - u4_int_range_lps; |
|
u4_symbol = ((u1_mps_state >> 6) & 0x1); |
|
u1_mps_state = (table_lookup >> 8) & 0x7F; |
|
|
|
CHECK_IF_LPS(u4_code_int_range, u4_code_int_val_ofst, |
|
u4_symbol, u4_int_range_lps, u1_mps_state, |
|
table_lookup) |
|
|
|
if(u4_code_int_range < ONE_RIGHT_SHIFTED_BY_14) |
|
{ |
|
UWORD32 read_bits, u4_clz; |
|
u4_clz = CLZ(u4_code_int_range); |
|
NEXTBITS(read_bits, (u4_offset + 23), pu4_buffer, |
|
u4_clz) |
|
FLUSHBITS(u4_offset, (u4_clz)) |
|
u4_code_int_range = u4_code_int_range << u4_clz; |
|
u4_code_int_val_ofst = (u4_code_int_val_ofst << u4_clz) |
|
| read_bits; |
|
} |
|
|
|
ps_ctxt_sig_coeff->u1_mps_state = u1_mps_state; |
|
uc_bin = u4_symbol; |
|
} |
|
/*incrementing pointer to point to the context of the next bin*/ |
|
ps_ctxt_sig_coeff = p_ctxt_sig_coeff_org |
|
+ pu1_sigcoeff_context_inc[i + 1]; |
|
|
|
/*inilined DecodeDecision_onebin ends*/ |
|
if(uc_bin) |
|
{ |
|
num_sig_coeffs++; |
|
SET_BIT(ps_tu_8x8->au4_sig_coeff_map[i>31], (i > 31 ? i - 32:i)); |
|
|
|
p_binCtxt_last = p_binCtxt_last_org |
|
+ pu1_lastcoeff_context_inc[i]; |
|
|
|
/*inilined DecodeDecision_onebin begins*/ |
|
|
|
{ |
|
UWORD32 u4_qnt_int_range, u4_int_range_lps; |
|
UWORD32 u4_symbol, u1_mps_state; |
|
UWORD32 table_lookup; |
|
const UWORD32 *pu4_table = |
|
(const UWORD32 *)ps_cab_env->cabac_table; |
|
UWORD32 u4_clz; |
|
|
|
u1_mps_state = (p_binCtxt_last->u1_mps_state); |
|
|
|
u4_clz = CLZ(u4_code_int_range); |
|
u4_qnt_int_range = u4_code_int_range << u4_clz; |
|
u4_qnt_int_range = (u4_qnt_int_range >> 29) |
|
& 0x3; |
|
|
|
table_lookup = pu4_table[(u1_mps_state << 2) |
|
+ u4_qnt_int_range]; |
|
u4_int_range_lps = table_lookup & 0xff; |
|
|
|
u4_int_range_lps = u4_int_range_lps |
|
<< (23 - u4_clz); |
|
|
|
u4_code_int_range = u4_code_int_range |
|
- u4_int_range_lps; |
|
u4_symbol = ((u1_mps_state >> 6) & 0x1); |
|
u1_mps_state = (table_lookup >> 8) & 0x7F; |
|
|
|
CHECK_IF_LPS(u4_code_int_range, u4_code_int_val_ofst, |
|
u4_symbol, u4_int_range_lps, |
|
u1_mps_state, table_lookup) |
|
|
|
p_binCtxt_last->u1_mps_state = u1_mps_state; |
|
uc_bin = u4_symbol; |
|
} |
|
|
|
/*inilined DecodeDecision_onebin ends*/ |
|
if(uc_bin == 1) |
|
goto label_read_levels; |
|
|
|
} |
|
|
|
i = i + 1; |
|
|
|
} |
|
while(i < uc_last_coeff_idx); |
|
|
|
num_sig_coeffs++; |
|
SET_BIT(ps_tu_8x8->au4_sig_coeff_map[i>31], (i > 31 ? i - 32:i)); |
|
|
|
label_read_levels: ; |
|
} |
|
|
|
/// VALUE of No of Coeff in BLOCK = i + 1 for second case else i; |
|
|
|
/* Decode coeff_abs_level_minus1 and coeff_sign_flag */ |
|
{ |
|
WORD32 i2_abs_lvl; |
|
UWORD32 u1_abs_level_equal1 = 1, u1_abs_level_gt1 = 0; |
|
|
|
UWORD32 u4_ctx_inc; |
|
UWORD32 ui_prefix; |
|
bin_ctxt_model_t *p_ctxt_abs_level; |
|
|
|
p_ctxt_abs_level = |
|
ps_dec->p_coeff_abs_level_minus1_t[LUMA_8X8_CTXCAT]; |
|
u4_ctx_inc = ((0x51)); |
|
|
|
/*****************************************************/ |
|
/* Main Loop runs for no. of Significant coefficient */ |
|
/*****************************************************/ |
|
do |
|
{ |
|
{ |
|
|
|
/*****************************************************/ |
|
/* inilining a modified ih264d_decode_bins_unary */ |
|
/*****************************************************/ |
|
|
|
{ |
|
UWORD32 u4_value; |
|
UWORD32 u4_symbol; |
|
bin_ctxt_model_t *ps_bin_ctxt; |
|
UWORD32 u4_ctx_Inc; |
|
u4_value = 0; |
|
|
|
u4_ctx_Inc = u4_ctx_inc & 0xf; |
|
ps_bin_ctxt = p_ctxt_abs_level + u4_ctx_Inc; |
|
|
|
do |
|
{ |
|
{ |
|
UWORD32 u4_qnt_int_range, |
|
u4_int_range_lps; |
|
UWORD32 u1_mps_state; |
|
UWORD32 table_lookup; |
|
const UWORD32 *pu4_table = |
|
(const UWORD32 *)ps_cab_env->cabac_table; |
|
UWORD32 u4_clz; |
|
|
|
u1_mps_state = (ps_bin_ctxt->u1_mps_state); |
|
u4_clz = CLZ(u4_code_int_range); |
|
u4_qnt_int_range = u4_code_int_range |
|
<< u4_clz; |
|
u4_qnt_int_range = (u4_qnt_int_range |
|
>> 29) & 0x3; |
|
table_lookup = pu4_table[(u1_mps_state << 2) |
|
+ u4_qnt_int_range]; |
|
u4_int_range_lps = table_lookup & 0xff; |
|
|
|
u4_int_range_lps = u4_int_range_lps |
|
<< (23 - u4_clz); |
|
u4_code_int_range = u4_code_int_range |
|
- u4_int_range_lps; |
|
u4_symbol = ((u1_mps_state >> 6) & 0x1); |
|
u1_mps_state = (table_lookup >> 8) & 0x7F; |
|
|
|
CHECK_IF_LPS(u4_code_int_range, |
|
u4_code_int_val_ofst, u4_symbol, |
|
u4_int_range_lps, u1_mps_state, |
|
table_lookup) |
|
|
|
if(u4_code_int_range < ONE_RIGHT_SHIFTED_BY_9) |
|
{ |
|
|
|
RENORM_RANGE_OFFSET(u4_code_int_range, |
|
u4_code_int_val_ofst, |
|
u4_offset, pu4_buffer) |
|
} |
|
|
|
ps_bin_ctxt->u1_mps_state = u1_mps_state; |
|
} |
|
|
|
u4_value++; |
|
ps_bin_ctxt = p_ctxt_abs_level + (u4_ctx_inc >> 4); |
|
|
|
} |
|
while(u4_symbol && (u4_value < UCOFF_LEVEL)); |
|
|
|
ui_prefix = u4_value - 1 + u4_symbol; |
|
} |
|
|
|
if(ui_prefix == UCOFF_LEVEL) |
|
{ |
|
UWORD32 ui16_sufS = 0; |
|
UWORD32 u1_max_bins; |
|
UWORD32 u4_value; |
|
|
|
i2_abs_lvl = UCOFF_LEVEL; |
|
/*inlining ih264d_decode_bypass_bins_unary begins*/ |
|
|
|
{ |
|
UWORD32 uc_bin; |
|
UWORD32 bits_to_flush; |
|
UWORD32 max_bits = 32; |
|
|
|
bits_to_flush = 0; |
|
/*renormalize to ensure there 23 bits more in the u4_code_int_val_ofst*/ |
|
{ |
|
UWORD32 u4_clz, read_bits; |
|
|
|
u4_clz = CLZ(u4_code_int_range); |
|
FLUSHBITS(u4_offset, u4_clz) |
|
NEXTBITS(read_bits, u4_offset, pu4_buffer, 23) |
|
u4_code_int_range = u4_code_int_range << u4_clz; |
|
u4_code_int_val_ofst = (u4_code_int_val_ofst |
|
<< u4_clz) | read_bits; |
|
} |
|
|
|
do |
|
{ |
|
bits_to_flush++; |
|
|
|
u4_code_int_range = u4_code_int_range >> 1; |
|
|
|
if(u4_code_int_val_ofst >= u4_code_int_range) |
|
{ |
|
/* S=1 */ |
|
uc_bin = 1; |
|
u4_code_int_val_ofst -= u4_code_int_range; |
|
} |
|
else |
|
{ |
|
/* S=0 */ |
|
uc_bin = 0; |
|
} |
|
|
|
} |
|
while(uc_bin && (bits_to_flush < max_bits)); |
|
|
|
u4_value = (bits_to_flush - 1); |
|
} |
|
/*inlining ih264d_decode_bypass_bins_unary ends*/ |
|
|
|
ui16_sufS = (1 << u4_value); |
|
u1_max_bins = u4_value; |
|
|
|
if(u4_value > 0) |
|
{ |
|
/*inline bypassbins_flc begins*/ |
|
|
|
if(u4_value > 10) |
|
{ |
|
UWORD32 u4_clz, read_bits; |
|
|
|
u4_clz = CLZ(u4_code_int_range); |
|
FLUSHBITS(u4_offset, u4_clz) |
|
NEXTBITS(read_bits, u4_offset, pu4_buffer, 23) |
|
u4_code_int_range = u4_code_int_range << u4_clz; |
|
u4_code_int_val_ofst = (u4_code_int_val_ofst |
|
<< u4_clz) | read_bits; |
|
} |
|
|
|
{ |
|
UWORD32 ui_bins; |
|
UWORD32 uc_bin; |
|
UWORD32 bits_to_flush; |
|
|
|
ui_bins = 0; |
|
bits_to_flush = 0; |
|
|
|
do |
|
{ |
|
bits_to_flush++; |
|
|
|
u4_code_int_range = u4_code_int_range >> 1; |
|
|
|
if(u4_code_int_val_ofst |
|
>= u4_code_int_range) |
|
{ |
|
/* S=1 */ |
|
uc_bin = 1; |
|
u4_code_int_val_ofst -= |
|
u4_code_int_range; |
|
} |
|
else |
|
{ |
|
/* S=0 */ |
|
uc_bin = 0; |
|
} |
|
|
|
ui_bins = ((ui_bins << 1) | uc_bin); |
|
|
|
} |
|
while(bits_to_flush < u1_max_bins); |
|
|
|
u4_value = ui_bins; |
|
} |
|
/*inline bypassbins_flc ends*/ |
|
} |
|
|
|
//Value of K |
|
ui16_sufS += u4_value; |
|
i2_abs_lvl += ui16_sufS; |
|
} |
|
else |
|
{ |
|
i2_abs_lvl = 1 + ui_prefix; |
|
} |
|
|
|
if(i2_abs_lvl > 1) |
|
{ |
|
u1_abs_level_gt1++; |
|
} |
|
if(!u1_abs_level_gt1) |
|
{ |
|
u1_abs_level_equal1++; |
|
u4_ctx_inc = (5 << 4) + MIN(u1_abs_level_equal1, 4); |
|
} |
|
else |
|
{ |
|
u4_ctx_inc = (5 + MIN(u1_abs_level_gt1, 4)) << 4; |
|
} |
|
|
|
/*u4_ctx_inc = g_table_temp[u1_abs_level_gt1][u1_abs_level_equal1];*/ |
|
|
|
/* encode coeff_sign_flag[i] */ |
|
|
|
{ |
|
u4_code_int_range = u4_code_int_range >> 1; |
|
|
|
if(u4_code_int_val_ofst >= (u4_code_int_range)) |
|
{ |
|
/* S=1 */ |
|
u4_code_int_val_ofst -= u4_code_int_range; |
|
i2_abs_lvl = (-i2_abs_lvl); |
|
} |
|
} |
|
|
|
*pi2_coeff_data++ = i2_abs_lvl; |
|
num_sig_coeffs--; |
|
} |
|
} |
|
while(num_sig_coeffs > 0); |
|
} |
|
} |
|
|
|
{ |
|
WORD32 offset; |
|
offset = (UWORD8 *)pi2_coeff_data - (UWORD8 *)ps_tu_8x8; |
|
offset = ALIGN4(offset); |
|
ps_dec->pv_parse_tu_coeff_data = (void *)((UWORD8 *)ps_dec->pv_parse_tu_coeff_data + offset); |
|
} |
|
|
|
/*updating structures*/ |
|
ps_cab_env->u4_code_int_val_ofst = u4_code_int_val_ofst; |
|
ps_cab_env->u4_code_int_range = u4_code_int_range; |
|
ps_bitstrm->u4_ofst = u4_offset; |
|
} |
|
|
|
/*****************************************************************************/ |
|
/* */ |
|
/* Function Name : ih264d_cabac_parse_8x8block */ |
|
/* */ |
|
/* Description : This function does the residual parsing of 4 subblocks */ |
|
/* in a 8x8 block. */ |
|
/* */ |
|
/* Inputs : pi2_coeff_block : pointer to residual block where */ |
|
/* decoded and inverse scan coefficients are updated */ |
|
/* */ |
|
/* u4_sub_block_strd : indicates the number of sublocks */ |
|
/* in a row. It is 4 for luma and 2 for chroma. */ |
|
/* */ |
|
/* u4_ctx_cat : inidicates context category for residual */ |
|
/* decoding. */ |
|
/* */ |
|
/* ps_dec : pointer to Decstruct (decoder context) */ |
|
/* */ |
|
/* pu1_top_nnz : top nnz pointer */ |
|
/* */ |
|
/* pu1_left_nnz : left nnz pointer */ |
|
/* */ |
|
/* Globals : No */ |
|
/* Processing : Parsing for four subblocks in unrolled, top and left nnz */ |
|
/* are updated on the fly. csbp is set in accordance to */ |
|
/* decoded numcoeff for the subblock index in raster order */ |
|
/* */ |
|
/* Outputs : The updated residue buffer, nnzs and csbp current block */ |
|
/* */ |
|
/* Returns : Returns the coded sub block pattern csbp for the block */ |
|
/* */ |
|
/* Issues : <List any issues or problems with this function> */ |
|
/* */ |
|
/* Revision History: */ |
|
/* */ |
|
/* DD MM YYYY Author(s) Changes (Describe the changes made) */ |
|
/* 09 10 2008 Jay Draft */ |
|
/* */ |
|
/*****************************************************************************/ |
|
UWORD32 ih264d_cabac_parse_8x8block(WORD16 *pi2_coeff_block, |
|
UWORD32 u4_sub_block_strd, |
|
UWORD32 u4_ctx_cat, |
|
dec_struct_t * ps_dec, |
|
UWORD8 *pu1_top_nnz, |
|
UWORD8 *pu1_left_nnz) |
|
{ |
|
UWORD32 u4_ctxinc, u4_subblock_coded; |
|
UWORD32 u4_top0, u4_top1; |
|
UWORD32 u4_csbp = 0; |
|
UWORD32 u4_idx = 0; |
|
dec_bit_stream_t * const ps_bitstrm = ps_dec->ps_bitstrm; |
|
bin_ctxt_model_t * const ps_cbf = ps_dec->p_cbf_t[u4_ctx_cat]; |
|
bin_ctxt_model_t *ps_src_bin_ctxt; |
|
bin_ctxt_model_t * const ps_sig_coeff_flag = |
|
ps_dec->p_significant_coeff_flag_t[u4_ctx_cat]; |
|
|
|
UWORD8 *pu1_inv_scan = ps_dec->pu1_inv_scan; |
|
|
|
/*------------------------------------------------------*/ |
|
/* Residual 4x4 decoding: SubBlock 0 */ |
|
/*------------------------------------------------------*/ |
|
u4_ctxinc = ((!!pu1_top_nnz[0]) << 1) + (!!pu1_left_nnz[0]); |
|
|
|
ps_src_bin_ctxt = ps_cbf + u4_ctxinc; |
|
|
|
u4_top0 = ih264d_read_coeff4x4_cabac( ps_bitstrm, |
|
u4_ctx_cat, ps_sig_coeff_flag, ps_dec, |
|
ps_src_bin_ctxt); |
|
|
|
INSERT_BIT(u4_csbp, u4_idx, u4_top0); |
|
|
|
/*------------------------------------------------------*/ |
|
/* Residual 4x4 decoding: SubBlock 1 */ |
|
/*------------------------------------------------------*/ |
|
u4_idx++; |
|
pi2_coeff_block += NUM_COEFFS_IN_4x4BLK; |
|
u4_ctxinc = ((!!pu1_top_nnz[1]) << 1) + u4_top0; |
|
|
|
ps_src_bin_ctxt = ps_cbf + u4_ctxinc; |
|
|
|
u4_top1 = ih264d_read_coeff4x4_cabac(ps_bitstrm, |
|
u4_ctx_cat, ps_sig_coeff_flag, ps_dec, |
|
ps_src_bin_ctxt); |
|
|
|
INSERT_BIT(u4_csbp, u4_idx, u4_top1); |
|
pu1_left_nnz[0] = u4_top1; |
|
|
|
/*------------------------------------------------------*/ |
|
/* Residual 4x4 decoding: SubBlock 2 */ |
|
/*------------------------------------------------------*/ |
|
u4_idx += (u4_sub_block_strd - 1); |
|
pi2_coeff_block += ((u4_sub_block_strd - 1) * NUM_COEFFS_IN_4x4BLK); |
|
u4_ctxinc = (u4_top0 << 1) + (!!pu1_left_nnz[1]); |
|
|
|
ps_src_bin_ctxt = ps_cbf + u4_ctxinc; |
|
|
|
u4_subblock_coded = ih264d_read_coeff4x4_cabac(ps_bitstrm, u4_ctx_cat, |
|
ps_sig_coeff_flag, ps_dec, |
|
ps_src_bin_ctxt); |
|
|
|
INSERT_BIT(u4_csbp, u4_idx, u4_subblock_coded); |
|
pu1_top_nnz[0] = u4_subblock_coded; |
|
|
|
/*------------------------------------------------------*/ |
|
/* Residual 4x4 decoding: SubBlock 3 */ |
|
/*------------------------------------------------------*/ |
|
u4_idx++; |
|
pi2_coeff_block += NUM_COEFFS_IN_4x4BLK; |
|
u4_ctxinc = (u4_top1 << 1) + u4_subblock_coded; |
|
|
|
ps_src_bin_ctxt = ps_cbf + u4_ctxinc; |
|
|
|
u4_subblock_coded = ih264d_read_coeff4x4_cabac(ps_bitstrm, u4_ctx_cat, |
|
ps_sig_coeff_flag, ps_dec, |
|
ps_src_bin_ctxt); |
|
|
|
INSERT_BIT(u4_csbp, u4_idx, u4_subblock_coded); |
|
pu1_top_nnz[1] = pu1_left_nnz[1] = u4_subblock_coded; |
|
|
|
return (u4_csbp); |
|
} |
|
|
|
/*! |
|
************************************************************************** |
|
* \if Function name : ih264d_parse_residual4x4_cabac \endif |
|
* |
|
* \brief |
|
* This function parses CABAC syntax of a Luma and Chroma AC Residuals. |
|
* |
|
* \return |
|
* 0 on Success and Error code otherwise |
|
************************************************************************** |
|
*/ |
|
|
|
WORD32 ih264d_parse_residual4x4_cabac(dec_struct_t * ps_dec, |
|
dec_mb_info_t *ps_cur_mb_info, |
|
UWORD8 u1_offset) |
|
{ |
|
UWORD8 u1_cbp = ps_cur_mb_info->u1_cbp; |
|
UWORD16 ui16_csbp = 0; |
|
WORD16 *pi2_residual_buf; |
|
UWORD8 uc_ctx_cat; |
|
UWORD8 *pu1_top_nnz = ps_cur_mb_info->ps_curmb->pu1_nnz_y; |
|
UWORD8 *pu1_left_nnz = ps_dec->pu1_left_nnz_y; |
|
UWORD8 *pu1_top_nnz_uv = ps_cur_mb_info->ps_curmb->pu1_nnz_uv; |
|
ctxt_inc_mb_info_t *p_curr_ctxt = ps_dec->ps_curr_ctxt_mb_info; |
|
ctxt_inc_mb_info_t *ps_top_ctxt = ps_dec->p_top_ctxt_mb_info; |
|
dec_bit_stream_t * const ps_bitstrm = ps_dec->ps_bitstrm; |
|
UWORD32 u4_nbr_avail = ps_dec->u1_mb_ngbr_availablity; |
|
WORD16 *pi2_coeff_block = NULL; |
|
bin_ctxt_model_t *ps_src_bin_ctxt; |
|
|
|
UWORD8 u1_top_dc_csbp = (ps_top_ctxt->u1_yuv_dc_csbp) >> 1; |
|
UWORD8 u1_left_dc_csbp = (ps_dec->pu1_left_yuv_dc_csbp[0]) >> 1; |
|
|
|
|
|
if(!(u4_nbr_avail & TOP_MB_AVAILABLE_MASK)) |
|
{ |
|
if(p_curr_ctxt->u1_mb_type & CAB_INTRA_MASK) |
|
{ |
|
*(UWORD32 *)pu1_top_nnz = 0; |
|
u1_top_dc_csbp = 0; |
|
*(UWORD32 *)pu1_top_nnz_uv = 0; |
|
} |
|
else |
|
{ |
|
*(UWORD32 *)pu1_top_nnz = 0x01010101; |
|
u1_top_dc_csbp = 0x3; |
|
*(UWORD32 *)pu1_top_nnz_uv = 0x01010101; |
|
} |
|
} |
|
else |
|
{ |
|
UWORD32 *pu4_buf; |
|
UWORD8 *pu1_buf; |
|
pu1_buf = ps_cur_mb_info->ps_top_mb->pu1_nnz_y; |
|
pu4_buf = (UWORD32 *)pu1_buf; |
|
*(UWORD32 *)(pu1_top_nnz) = *pu4_buf; |
|
|
|
pu1_buf = ps_cur_mb_info->ps_top_mb->pu1_nnz_uv; |
|
pu4_buf = (UWORD32 *)pu1_buf; |
|
*(UWORD32 *)(pu1_top_nnz_uv) = *pu4_buf; |
|
|
|
} |
|
|
|
if(!(u4_nbr_avail & LEFT_MB_AVAILABLE_MASK)) |
|
{ |
|
if(p_curr_ctxt->u1_mb_type & CAB_INTRA_MASK) |
|
{ |
|
UWORD32 *pu4_buf; |
|
UWORD8 *pu1_buf; |
|
*(UWORD32 *)pu1_left_nnz = 0; |
|
u1_left_dc_csbp = 0; |
|
pu1_buf = ps_dec->pu1_left_nnz_uv; |
|
pu4_buf = (UWORD32 *)pu1_buf; |
|
*pu4_buf = 0; |
|
} |
|
else |
|
{ |
|
UWORD32 *pu4_buf; |
|
UWORD8 *pu1_buf; |
|
*(UWORD32 *)pu1_left_nnz = 0x01010101; |
|
u1_left_dc_csbp = 0x3; |
|
pu1_buf = ps_dec->pu1_left_nnz_uv; |
|
pu4_buf = (UWORD32 *)pu1_buf; |
|
*pu4_buf = 0x01010101; |
|
} |
|
} |
|
|
|
uc_ctx_cat = u1_offset ? LUMA_AC_CTXCAT : LUMA_4X4_CTXCAT; |
|
|
|
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_qp_rem6 = ps_dec->u1_qp_y_rem6; |
|
ps_cur_mb_info->u1_qpc_rem6 = ps_dec->u1_qp_u_rem6; |
|
// CHECK_THIS |
|
ps_cur_mb_info->u1_qpcr_div6 = ps_dec->u1_qp_v_div6; |
|
ps_cur_mb_info->u1_qpcr_rem6 = ps_dec->u1_qp_v_rem6; |
|
|
|
if(u1_cbp & 0x0f) |
|
{ |
|
if(ps_cur_mb_info->u1_tran_form8x8 == 0) |
|
{ |
|
/*******************************************************************/ |
|
/* Block 0 residual decoding, check cbp and proceed (subblock = 0) */ |
|
/*******************************************************************/ |
|
if(!(u1_cbp & 0x1)) |
|
{ |
|
*(UWORD16 *)(pu1_top_nnz) = 0; |
|
*(UWORD16 *)(pu1_left_nnz) = 0; |
|
} |
|
else |
|
{ |
|
ui16_csbp = ih264d_cabac_parse_8x8block(pi2_coeff_block, 4, |
|
uc_ctx_cat, ps_dec, |
|
pu1_top_nnz, |
|
pu1_left_nnz); |
|
} |
|
|
|
/*******************************************************************/ |
|
/* Block 1 residual decoding, check cbp and proceed (subblock = 2) */ |
|
/*******************************************************************/ |
|
pi2_coeff_block += (2 * NUM_COEFFS_IN_4x4BLK); |
|
if(!(u1_cbp & 0x2)) |
|
{ |
|
*(UWORD16 *)(pu1_top_nnz + 2) = 0; |
|
*(UWORD16 *)(pu1_left_nnz) = 0; |
|
} |
|
else |
|
{ |
|
UWORD32 u4_temp = ih264d_cabac_parse_8x8block(pi2_coeff_block, |
|
4, uc_ctx_cat, |
|
ps_dec, |
|
(pu1_top_nnz + 2), |
|
pu1_left_nnz); |
|
ui16_csbp |= (u4_temp << 2); |
|
} |
|
|
|
/*******************************************************************/ |
|
/* Block 2 residual decoding, check cbp and proceed (subblock = 8) */ |
|
/*******************************************************************/ |
|
pi2_coeff_block += (6 * NUM_COEFFS_IN_4x4BLK); |
|
if(!(u1_cbp & 0x4)) |
|
{ |
|
*(UWORD16 *)(pu1_top_nnz) = 0; |
|
*(UWORD16 *)(pu1_left_nnz + 2) = 0; |
|
} |
|
else |
|
{ |
|
UWORD32 u4_temp = ih264d_cabac_parse_8x8block( |
|
pi2_coeff_block, 4, uc_ctx_cat, ps_dec, |
|
pu1_top_nnz, (pu1_left_nnz + 2)); |
|
ui16_csbp |= (u4_temp << 8); |
|
} |
|
|
|
/*******************************************************************/ |
|
/* Block 3 residual decoding, check cbp and proceed (subblock = 10)*/ |
|
/*******************************************************************/ |
|
pi2_coeff_block += (2 * NUM_COEFFS_IN_4x4BLK); |
|
if(!(u1_cbp & 0x8)) |
|
{ |
|
*(UWORD16 *)(pu1_top_nnz + 2) = 0; |
|
*(UWORD16 *)(pu1_left_nnz + 2) = 0; |
|
} |
|
else |
|
{ |
|
UWORD32 u4_temp = ih264d_cabac_parse_8x8block( |
|
pi2_coeff_block, 4, uc_ctx_cat, ps_dec, |
|
(pu1_top_nnz + 2), (pu1_left_nnz + 2)); |
|
ui16_csbp |= (u4_temp << 10); |
|
} |
|
|
|
} |
|
else |
|
{ |
|
ui16_csbp = 0; |
|
|
|
/*******************************************************************/ |
|
/* Block 0 residual decoding, check cbp and proceed (subblock = 0) */ |
|
/*******************************************************************/ |
|
if(!(u1_cbp & 0x1)) |
|
{ |
|
*(UWORD16 *)(pu1_top_nnz) = 0; |
|
*(UWORD16 *)(pu1_left_nnz) = 0; |
|
} |
|
else |
|
{ |
|
|
|
dec_bit_stream_t * const ps_bitstrm = ps_dec->ps_bitstrm; |
|
|
|
ih264d_read_coeff8x8_cabac( ps_bitstrm, |
|
ps_dec, ps_cur_mb_info); |
|
|
|
pu1_left_nnz[0] = 1; |
|
pu1_left_nnz[1] = 1; |
|
|
|
pu1_top_nnz[0] = 1; |
|
pu1_top_nnz[1] = 1; |
|
|
|
/* added to be used by BS computation module */ |
|
ui16_csbp |= 0x0033; |
|
} |
|
|
|
/*******************************************************************/ |
|
/* Block 1 residual decoding, check cbp and proceed (subblock = 2) */ |
|
/*******************************************************************/ |
|
pi2_coeff_block += 64; |
|
|
|
if(!(u1_cbp & 0x2)) |
|
{ |
|
*(UWORD16 *)(pu1_top_nnz + 2) = 0; |
|
*(UWORD16 *)(pu1_left_nnz) = 0; |
|
} |
|
else |
|
{ |
|
|
|
|
|
dec_bit_stream_t * const ps_bitstrm = ps_dec->ps_bitstrm; |
|
|
|
ih264d_read_coeff8x8_cabac(ps_bitstrm, |
|
ps_dec, ps_cur_mb_info); |
|
|
|
pu1_left_nnz[0] = 1; |
|
pu1_left_nnz[1] = 1; |
|
|
|
pu1_top_nnz[2] = 1; |
|
pu1_top_nnz[3] = 1; |
|
|
|
/* added to be used by BS computation module */ |
|
ui16_csbp |= 0x00CC; |
|
|
|
} |
|
|
|
/*******************************************************************/ |
|
/* Block 2 residual decoding, check cbp and proceed (subblock = 8) */ |
|
/*******************************************************************/ |
|
pi2_coeff_block += 64; |
|
if(!(u1_cbp & 0x4)) |
|
{ |
|
*(UWORD16 *)(pu1_top_nnz) = 0; |
|
*(UWORD16 *)(pu1_left_nnz + 2) = 0; |
|
} |
|
else |
|
{ |
|
|
|
dec_bit_stream_t * const ps_bitstrm = ps_dec->ps_bitstrm; |
|
|
|
ih264d_read_coeff8x8_cabac(ps_bitstrm, |
|
ps_dec, ps_cur_mb_info); |
|
|
|
pu1_left_nnz[2] = 1; |
|
pu1_left_nnz[3] = 1; |
|
|
|
pu1_top_nnz[0] = 1; |
|
pu1_top_nnz[1] = 1; |
|
|
|
/* added to be used by BS computation module */ |
|
ui16_csbp |= 0x3300; |
|
} |
|
|
|
/*******************************************************************/ |
|
/* Block 3 residual decoding, check cbp and proceed (subblock = 10)*/ |
|
/*******************************************************************/ |
|
pi2_coeff_block += 64; |
|
|
|
if(!(u1_cbp & 0x8)) |
|
{ |
|
*(UWORD16 *)(pu1_top_nnz + 2) = 0; |
|
*(UWORD16 *)(pu1_left_nnz + 2) = 0; |
|
} |
|
else |
|
{ |
|
|
|
dec_bit_stream_t * const ps_bitstrm = ps_dec->ps_bitstrm; |
|
|
|
ih264d_read_coeff8x8_cabac(ps_bitstrm, |
|
ps_dec, ps_cur_mb_info); |
|
|
|
pu1_left_nnz[2] = 1; |
|
pu1_left_nnz[3] = 1; |
|
|
|
pu1_top_nnz[2] = 1; |
|
pu1_top_nnz[3] = 1; |
|
|
|
/* added to be used by BS computation module */ |
|
ui16_csbp |= 0xCC00; |
|
} |
|
} |
|
} |
|
else |
|
{ |
|
*(UWORD32 *)(pu1_top_nnz) = 0; |
|
*(UWORD32 *)(pu1_left_nnz) = 0; |
|
} |
|
/*--------------------------------------------------------------------*/ |
|
/* Store the last row of N values to top row */ |
|
/*--------------------------------------------------------------------*/ |
|
ps_cur_mb_info->u2_luma_csbp = ui16_csbp; |
|
ps_cur_mb_info->ps_curmb->u2_luma_csbp = ui16_csbp; |
|
{ |
|
WORD8 i; |
|
UWORD16 u2_chroma_csbp = 0; |
|
ps_cur_mb_info->u2_chroma_csbp = 0; |
|
|
|
u1_cbp >>= 4; |
|
pu1_top_nnz = pu1_top_nnz_uv; |
|
pu1_left_nnz = ps_dec->pu1_left_nnz_uv; |
|
/*--------------------------------------------------------------------*/ |
|
/* if Chroma Component not present OR no ac values present */ |
|
/* Set the values of N to zero */ |
|
/*--------------------------------------------------------------------*/ |
|
if(u1_cbp == CBPC_ALLZERO) |
|
{ |
|
ps_dec->pu1_left_yuv_dc_csbp[0] &= 0x1; |
|
*(UWORD32 *)(pu1_top_nnz) = 0; |
|
*(UWORD32 *)(pu1_left_nnz) = 0; |
|
p_curr_ctxt->u1_yuv_dc_csbp &= 0x1; |
|
return (0); |
|
} |
|
|
|
/*--------------------------------------------------------------------*/ |
|
/* Decode Chroma DC values */ |
|
/*--------------------------------------------------------------------*/ |
|
for(i = 0; i < 2; i++) |
|
{ |
|
UWORD8 uc_a = 1, uc_b = 1; |
|
UWORD32 u4_ctx_inc; |
|
UWORD8 uc_codedBlockFlag; |
|
UWORD8 pu1_inv_scan[4] = |
|
{ 0, 1, 2, 3 }; |
|
WORD32 u4_scale; |
|
WORD32 i4_mb_inter_inc; |
|
tu_sblk4x4_coeff_data_t *ps_tu_4x4 = |
|
(tu_sblk4x4_coeff_data_t *)ps_dec->pv_parse_tu_coeff_data; |
|
WORD16 *pi2_coeff_data = |
|
(WORD16 *)ps_dec->pv_parse_tu_coeff_data; |
|
WORD16 ai2_dc_coef[4]; |
|
|
|
INC_SYM_COUNT(&(ps_dec->s_cab_dec_env)); |
|
u4_scale = (i) ? |
|
(ps_dec->pu2_quant_scale_v[0] |
|
<< ps_dec->u1_qp_v_div6) : |
|
(ps_dec->pu2_quant_scale_u[0] |
|
<< ps_dec->u1_qp_u_div6); |
|
|
|
/*--------------------------------------------------------------------*/ |
|
/* Decode Bitstream to get the DC coeff */ |
|
/*--------------------------------------------------------------------*/ |
|
uc_a = (u1_left_dc_csbp >> i) & 0x01; |
|
uc_b = (u1_top_dc_csbp >> i) & 0x01; |
|
u4_ctx_inc = (uc_a + (uc_b << 1)); |
|
|
|
ps_src_bin_ctxt = (ps_dec->p_cbf_t[CHROMA_DC_CTXCAT]) + u4_ctx_inc; |
|
|
|
uc_codedBlockFlag = |
|
ih264d_read_coeff4x4_cabac(ps_bitstrm, |
|
CHROMA_DC_CTXCAT, |
|
ps_dec->p_significant_coeff_flag_t[CHROMA_DC_CTXCAT], |
|
ps_dec, ps_src_bin_ctxt); |
|
|
|
i4_mb_inter_inc = (!((ps_cur_mb_info->ps_curmb->u1_mb_type == I_4x4_MB) |
|
|| (ps_cur_mb_info->ps_curmb->u1_mb_type == I_16x16_MB))) |
|
* 3; |
|
|
|
if(ps_dec->s_high_profile.u1_scaling_present) |
|
{ |
|
u4_scale *= |
|
ps_dec->s_high_profile.i2_scalinglist4x4[i4_mb_inter_inc |
|
+ 1 + i][0]; |
|
|
|
} |
|
else |
|
{ |
|
u4_scale <<= 4; |
|
} |
|
|
|
if(uc_codedBlockFlag) |
|
{ |
|
WORD32 i_z0, i_z1, i_z2, i_z3; |
|
WORD32 *pi4_scale; |
|
|
|
SET_BIT(u1_top_dc_csbp, i); |
|
SET_BIT(u1_left_dc_csbp, i); |
|
|
|
ai2_dc_coef[0] = 0; |
|
ai2_dc_coef[1] = 0; |
|
ai2_dc_coef[2] = 0; |
|
ai2_dc_coef[3] = 0; |
|
|
|
ih264d_unpack_coeff4x4_dc_4x4blk(ps_tu_4x4, |
|
ai2_dc_coef, |
|
pu1_inv_scan); |
|
i_z0 = (ai2_dc_coef[0] + ai2_dc_coef[2]); |
|
i_z1 = (ai2_dc_coef[0] - ai2_dc_coef[2]); |
|
i_z2 = (ai2_dc_coef[1] - ai2_dc_coef[3]); |
|
i_z3 = (ai2_dc_coef[1] + ai2_dc_coef[3]); |
|
|
|
/*-----------------------------------------------------------*/ |
|
/* Scaling and storing the values back */ |
|
/*-----------------------------------------------------------*/ |
|
*pi2_coeff_data++ = ((i_z0 + i_z3) * u4_scale) >> 5; |
|
*pi2_coeff_data++ = ((i_z0 - i_z3) * u4_scale) >> 5; |
|
*pi2_coeff_data++ = ((i_z1 + i_z2) * u4_scale) >> 5; |
|
*pi2_coeff_data++ = ((i_z1 - i_z2) * u4_scale) >> 5; |
|
|
|
ps_dec->pv_parse_tu_coeff_data = (void *)pi2_coeff_data; |
|
|
|
SET_BIT(ps_cur_mb_info->u1_yuv_dc_block_flag,(i+1)); |
|
} |
|
else |
|
{ |
|
CLEARBIT(u1_top_dc_csbp, i); |
|
CLEARBIT(u1_left_dc_csbp, i); |
|
} |
|
} |
|
|
|
/*********************************************************************/ |
|
/* Update the DC csbp */ |
|
/*********************************************************************/ |
|
ps_dec->pu1_left_yuv_dc_csbp[0] &= 0x1; |
|
p_curr_ctxt->u1_yuv_dc_csbp &= 0x1; |
|
ps_dec->pu1_left_yuv_dc_csbp[0] |= (u1_left_dc_csbp << 1); |
|
p_curr_ctxt->u1_yuv_dc_csbp |= (u1_top_dc_csbp << 1); |
|
if(u1_cbp == CBPC_ACZERO) |
|
{ |
|
*(UWORD32 *)(pu1_top_nnz) = 0; |
|
*(UWORD32 *)(pu1_left_nnz) = 0; |
|
return (0); |
|
} |
|
/*--------------------------------------------------------------------*/ |
|
/* Decode Chroma AC values */ |
|
/*--------------------------------------------------------------------*/ |
|
{ |
|
UWORD32 u4_temp; |
|
/*****************************************************************/ |
|
/* U Block residual decoding, check cbp and proceed (subblock=0)*/ |
|
/*****************************************************************/ |
|
u2_chroma_csbp = ih264d_cabac_parse_8x8block(pi2_coeff_block, 2, |
|
CHROMA_AC_CTXCAT, |
|
ps_dec, pu1_top_nnz, |
|
pu1_left_nnz); |
|
|
|
pi2_coeff_block += MB_CHROM_SIZE; |
|
/*****************************************************************/ |
|
/* V Block residual decoding, check cbp and proceed (subblock=1)*/ |
|
/*****************************************************************/ |
|
u4_temp = ih264d_cabac_parse_8x8block(pi2_coeff_block, 2, |
|
CHROMA_AC_CTXCAT, |
|
ps_dec, (pu1_top_nnz + 2), |
|
(pu1_left_nnz + 2)); |
|
u2_chroma_csbp |= (u4_temp << 4); |
|
} |
|
/*********************************************************************/ |
|
/* Update the AC csbp */ |
|
/*********************************************************************/ |
|
ps_cur_mb_info->u2_chroma_csbp = u2_chroma_csbp; |
|
} |
|
|
|
return (0); |
|
} |
|
|
|
|