50fd862b8d
This commit does not introduce any new functionality w.r.t previous commit. But it fixes few things. They are listed below: 1. Guard Bands in header files are fixed 2. Header files contains function definition comments. These are same as in source file. Maintaining same comment at two locations is unnecessary. These are removed. 3. Improved consistency and code indentation 4. Removed comments that dont align with implementation 5. Grouped headers of a workspace together
260 lines
8.7 KiB
C
260 lines
8.7 KiB
C
/******************************************************************************
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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
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* ih264e_cabac_structs.h
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*
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* @brief
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* This file contains structure definitions necessary for cabac encoding
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*
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* @author
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* ittiam
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*
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* @remarks
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* none
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*
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*******************************************************************************
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*/
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#ifndef _IH264E_CABAC_STRUCTS_H_
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#define _IH264E_CABAC_STRUCTS_H_
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/*****************************************************************************/
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/* Constant Macros */
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/*****************************************************************************/
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#define CABAC_INIT_IDC 2
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/*****************************************************************************/
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/* Structures */
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/*****************************************************************************/
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/**
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*******************************************************************************
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* @brief typedef for context model
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*******************************************************************************
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*/
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/* bits 0 to 5 :state
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bit 6 :mps */
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typedef UWORD8 bin_ctxt_model;
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/**
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*******************************************************************************
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* @brief MB info for cabac
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*******************************************************************************
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*/
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typedef struct
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{
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/* Neighbour availability Variables needed to get CtxtInc, for CABAC */
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UWORD8 u1_mb_type; /* !< macroblock type: I/P/B/SI/SP */
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UWORD8 u1_cbp; /* !< Coded Block Pattern */
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UWORD8 u1_intrapred_chroma_mode;
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/*************************************************************************/
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/* Arrangnment of AC CSBP */
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/* bits: b7 b6 b5 b4 b3 b2 b1 b0 */
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/* CSBP: V1 V0 U1 U0 Y3 Y2 Y1 Y0 */
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/*************************************************************************/
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UWORD8 u1_yuv_ac_csbp;
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/*************************************************************************/
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/* Arrangnment of DC CSBP */
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/* bits: b7 b6 b5 b4 b3 b2 b1 b0 */
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/* CSBP: x x x x x Vdc Udc Ydc */
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/*************************************************************************/
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UWORD8 u1_yuv_dc_csbp;
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WORD8 i1_ref_idx[4];
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UWORD8 u1_mv[4][4];
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} mb_info_ctxt_t;
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/**
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*******************************************************************************
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* @brief CSBP info for CABAC
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*******************************************************************************
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*/
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typedef struct
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{
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/*************************************************************************/
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/* Arrangnment of Luma AC CSBP for leftMb */
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/* bits: b7 b6 b5 b4 b3 b2 b1 b0 */
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/* CSBP: X X X X Y3 Y2 Y1 Y0 */
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/*************************************************************************/
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/*************************************************************************/
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/* Points either to u1_y_ac_csbp_top_mb or u1_y_ac_csbp_bot_mb */
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/*************************************************************************/
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UWORD8 u1_y_ac_csbp_top_mb;
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UWORD8 u1_y_ac_csbp_bot_mb;
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/*************************************************************************/
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/* Arrangnment of Chroma AC CSBP for leftMb */
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/* bits: b7 b6 b5 b4 b3 b2 b1 b0 */
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/* CSBP: X X X X V1 V0 U1 U0 */
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/*************************************************************************/
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/*************************************************************************/
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/* Points either to u1_uv_ac_csbp_top_mb or u1_uv_ac_csbp_bot_mb */
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/*************************************************************************/
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UWORD8 u1_uv_ac_csbp_top_mb;
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UWORD8 u1_uv_ac_csbp_bot_mb;
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/*************************************************************************/
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/* Arrangnment of DC CSBP */
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/* bits: b7 b6 b5 b4 b3 b2 b1 b0 */
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/* CSBP: x x x x x Vdc Udc Ydc */
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/*************************************************************************/
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/*************************************************************************/
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/* Points either to u1_yuv_dc_csbp_top_mb or u1_yuv_dc_csbp_bot_mb */
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/*************************************************************************/
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UWORD8 u1_yuv_dc_csbp_top_mb;
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UWORD8 u1_yuv_dc_csbp_bot_mb;
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} cab_csbp_t;
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/**
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*******************************************************************************
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* @brief CABAC Encoding Environment
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*******************************************************************************
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*/
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typedef struct
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{
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/**
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* cabac interval start L
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*/
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UWORD32 u4_code_int_low;
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/**
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* cabac interval range R
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*/
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UWORD32 u4_code_int_range;
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/** bytes_outsanding; number of 0xFF bits that occur during renorm
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* These will be accumulated till the carry bit is knwon
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*/
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UWORD32 u4_out_standing_bytes;
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/** bits generated during renormalization
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* A byte is put to stream/u4_out_standing_bytes from u4_low(L) when
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* u4_bits_gen exceeds 8
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*/
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UWORD32 u4_bits_gen;
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} encoding_envirnoment_t;
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/**
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*******************************************************************************
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* @brief CABAC Context structure : Variables to handle Cabac
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*******************************************************************************
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*/
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typedef struct
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{
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/**
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* Base pointer to all the cabac contexts
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*/
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bin_ctxt_model au1_cabac_ctxt_table[NUM_CABAC_CTXTS];
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/**
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* left csbp
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*/
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cab_csbp_t s_lft_csbp;
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/**
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* pointer to Bitstream structure
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*/
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bitstrm_t *ps_bitstrm;
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/**
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* Pointer to mb_info_ctxt_t map_base
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*/
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mb_info_ctxt_t *ps_mb_map_ctxt_inc_base;
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/**
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* Pointer to encoding_envirnoment_t
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*/
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encoding_envirnoment_t s_cab_enc_env;
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/* These things need to be updated at each MbLevel */
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/**
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* Prev mb_qp_delta_ctxt
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*/
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WORD8 i1_prev_mb_qp_delta_ctxt;
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/**
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* Pointer to mb_info_ctxt_t map
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*/
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mb_info_ctxt_t *ps_mb_map_ctxt_inc;
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/**
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* Pointer to default mb_info_ctxt_t
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*/
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mb_info_ctxt_t *ps_def_ctxt_mb_info;
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/**
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* Pointer to current mb_info_ctxt_t
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*/
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mb_info_ctxt_t *ps_curr_ctxt_mb_info;
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/**
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* Pointer to left mb_info_ctxt_t
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*/
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mb_info_ctxt_t *ps_left_ctxt_mb_info;
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/**
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* Pointer to top mb_info_ctxt_t
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*/
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mb_info_ctxt_t *ps_top_ctxt_mb_info;
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/**
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* Pointer to csbp structures
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*/
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cab_csbp_t *ps_lft_csbp;
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UWORD8 *pu1_left_y_ac_csbp;
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UWORD8 *pu1_left_uv_ac_csbp;
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UWORD8 *pu1_left_yuv_dc_csbp;
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/**************************************************************************/
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/* Ref_idx contexts are stored in the following way */
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/* Array Idx 0,1 for reference indices in Forward direction */
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/* Array Idx 2,3 for reference indices in backward direction */
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/**************************************************************************/
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/**
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* Dimensions for u1_left_ref_ctxt_inc_arr is [2][4] for Mbaff:Top and Bot
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*/
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WORD8 i1_left_ref_idx_ctx_inc_arr[2][4];
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WORD8 *pi1_left_ref_idx_ctxt_inc;
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/**
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* Dimensions for u1_left_mv_ctxt_inc_arr is [2][4][4] for Mbaff case
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*/
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UWORD8 u1_left_mv_ctxt_inc_arr[2][4][4];
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UWORD8 (*pu1_left_mv_ctxt_inc)[4];
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} cabac_ctxt_t;
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#endif /* _IH264E_CABAC_STRUCTS_H_ */
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