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Change-Id: I7efe9a589cd24edf86e8d086b40c27cbbf8b4017

1 files changed, 101 insertions, 0 deletions

diff --git a/common/ih264_cabac_tables.h b/common/ih264_cabac_tables.h
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+/******************************************************************************
+ *
+ * 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_ */