/****************************************************************************** * * 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_cabac.c * * \brief * This file contains cabac Residual decoding routines. * * \date * 20/03/2003 * * \author NS *************************************************************************** */ #include "ih264_typedefs.h" #include "ih264_macros.h" #include "ih264_platform_macros.h" #include "ih264d_defs.h" #include "ih264d_structs.h" #include "ih264d_cabac.h" #include "ih264d_bitstrm.h" #include "ih264d_parse_mb_header.h" #include "ih264d_debug.h" #include "ih264d_tables.h" #include "ih264d_error_handler.h" #include "ih264d_parse_cabac.h" #include "ih264d_parse_slice.h" #include "ih264d_tables.h" #include "ih264d_mb_utils.h" #include "ih264d_utils.h" /*! ******************************************************************************** * \if Function name : ih264d_read_coeff4x4_cabac \endif * * \brief This function encodes residual_block_cabac as defined in 7.3.5.3.2. * * \return * Returns the index of last significant coeff. * ******************************************************************************** */ UWORD8 ih264d_read_coeff4x4_cabac(dec_bit_stream_t *ps_bitstrm, UWORD32 u4_ctxcat, bin_ctxt_model_t *ps_ctxt_sig_coeff, dec_struct_t *ps_dec, /*!< pointer to access global variables*/ bin_ctxt_model_t *ps_ctxt_coded) { decoding_envirnoment_t *ps_cab_env = &ps_dec->s_cab_dec_env; UWORD32 u4_coded_flag; UWORD32 u4_offset, *pu4_buffer; UWORD32 u4_code_int_range, u4_code_int_val_ofst; tu_sblk4x4_coeff_data_t *ps_tu_4x4; WORD16 *pi2_coeff_data; WORD32 num_sig_coeffs = 0; /*loading from strcuctures*/ ps_tu_4x4 = (tu_sblk4x4_coeff_data_t *)ps_dec->pv_parse_tu_coeff_data; ps_tu_4x4->u2_sig_coeff_map = 0; pi2_coeff_data = &ps_tu_4x4->ai2_level[0]; 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; { /*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_coded->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_8) { RENORM_RANGE_OFFSET(u4_code_int_range, u4_code_int_val_ofst, u4_offset, pu4_buffer) } ps_ctxt_coded->u1_mps_state = u1_mps_state; u4_coded_flag = u4_symbol; /*inilined DecodeDecision_onebin ends*/ } } if(u4_coded_flag) { { bin_ctxt_model_t *p_binCtxt_last, *p_binCtxt_last_org; UWORD32 uc_last_coeff_idx; UWORD32 uc_bin; UWORD32 i; WORD32 first_coeff_offset = 0; if((u4_ctxcat == CHROMA_AC_CTXCAT) || (u4_ctxcat == LUMA_AC_CTXCAT)) { first_coeff_offset = 1; } i = 0; if(u4_ctxcat == CHROMA_DC_CTXCAT) { uc_last_coeff_idx = 3; } else { UWORD32 u4_start; u4_start = (u4_ctxcat & 1) + (u4_ctxcat >> 2); uc_last_coeff_idx = 15 - u4_start; } p_binCtxt_last_org = ps_ctxt_sig_coeff + LAST_COEFF_CTXT_MINUS_SIG_COEFF_CTXT; 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; } INC_BIN_COUNT( ps_cab_env) 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++; /*inilined DecodeDecision_onebin ends*/ if(uc_bin) { num_sig_coeffs++; SET_BIT(ps_tu_4x4->u2_sig_coeff_map, (i + first_coeff_offset)); p_binCtxt_last = p_binCtxt_last_org + 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) INC_BIN_COUNT(ps_cab_env) 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_4x4->u2_sig_coeff_map, (i + first_coeff_offset)); 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[u4_ctxcat]; u4_ctx_inc = ((0x51)); /*****************************************************/ /* Main Loop runs for no. of Significant coefficient */ /*****************************************************/ do { { INC_SYM_COUNT(&(ps_dec.s_cab_dec_env)); /*****************************************************/ /* 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) } INC_BIN_COUNT(ps_cab_env); ps_bin_ctxt->u1_mps_state = u1_mps_state; } INC_BIN_COUNT(ps_cab_env);INC_DECISION_BINS(ps_cab_env); 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; 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, CABAC_BITS_TO_READ) 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; } INC_BIN_COUNT( ps_cab_env);INC_BYPASS_BINS(ps_cab_env); } while(uc_bin && (bits_to_flush < CABAC_BITS_TO_READ)); 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, CABAC_BITS_TO_READ) 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; } INC_BIN_COUNT( ps_cab_env);INC_BYPASS_BINS(ps_cab_env); 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); } } 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; 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, CABAC_BITS_TO_READ) 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 < CABAC_BITS_TO_READ)); 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, CABAC_BITS_TO_READ) 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 += (WORD32)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 : */ /* */ /* 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); }