| /****************************************************************************** |
| * |
| * 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 ih264_cabac_tables.h |
| * |
| * @brief |
| * This file contains enumerations, macros and extern declarations of H264 |
| * cabac tables |
| * |
| * @author |
| * Ittiam |
| * |
| * @remarks |
| * none |
| ****************************************************************************** |
| */ |
| |
| #ifndef IH264_CABAC_TABLES_H_ |
| #define IH264_CABAC_TABLES_H_ |
| |
| /*****************************************************************************/ |
| /* Constant Macros */ |
| /*****************************************************************************/ |
| |
| /** |
| ****************************************************************************** |
| * @brief maximum range of cabac_init_idc (0-2) |
| ****************************************************************************** |
| */ |
| #define IH264_NUM_CABAC_INIT_IDC_PLUS_ONE 4 |
| |
| /** |
| ****************************************************************************** |
| * @brief max range of qps in H264 (0-51) |
| ****************************************************************************** |
| */ |
| #define IH264_MAX_QP 52 |
| |
| /** |
| ****************************************************************************** |
| * @brief max range of cabac contexts in H264 (0-459) |
| ****************************************************************************** |
| */ |
| #define IH264_NUM_CABAC_CTXTS 460 |
| |
| /*****************************************************************************/ |
| /* Extern global declarations */ |
| /*****************************************************************************/ |
| |
| /** |
| ****************************************************************************** |
| * @breif Table for rangeTabLPS depending on pStateIdx and qCodIRangeIdx |
| * input : pStateIdx(0-63) and qCodIRangeIdx(0-3) [(Range >> 6) & 0x3] |
| * output : RLps |
| * |
| * @remarks See Table 9-35 of H264 spec for rangeTabLPS |
| ******************************************************************************* |
| */ |
| extern const UWORD8 gau1_ih264_cabac_rlps[64][4]; |
| |
| |
| /** |
| ****************************************************************************** |
| * @breif probability+MPS state transition tables based on cur State and bin |
| * input : curpState[bits7-2] | curMPS[bit1] | decodedBin[bit0] |
| * output : nextpState[bits6-1] | nextMPS[bit0] |
| * @remarks Modified form of Table-9-36 State Transition table in H264 spec |
| ****************************************************************************** |
| */ |
| extern const UWORD8 gau1_ih264_next_state[128*2]; |
| |
| |
| /** |
| ****************************************************************************** |
| * @brief Init context tables for all combinations of qp and cabac_init_idc |
| * @remarks Packing format MPS in lsb and pState in bits[1-6] |
| ****************************************************************************** |
| */ |
| extern const UWORD8 gau1_ih264_cab_ctxts[IH264_NUM_CABAC_INIT_IDC_PLUS_ONE][IH264_MAX_QP][IH264_NUM_CABAC_CTXTS]; |
| |
| |
| #endif /* IH264_CABAC_TABLES_H_ */ |
