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
123 lines
4.5 KiB
C
123 lines
4.5 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.h
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*
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* @brief
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* This file contains declarations 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_H_
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#define _IH264E_CABAC_H_
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/*****************************************************************************/
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/* Macros */
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/*****************************************************************************/
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/**
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*******************************************************************************
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* @brief Bit precision of cabac engine;
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*******************************************************************************
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*/
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#define CABAC_BITS 9
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/**
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*******************************************************************************
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* @macro Reverse bits in an unsigned integer
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*******************************************************************************
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*/
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#define REV(u4_input, u4_output) \
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{ \
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UWORD32 u4_temp = (u4_input); \
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WORD8 i; \
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u4_output = 0; \
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for (i = 0; i < 32; i++) \
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{ \
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u4_output = (u4_output << 1) + \
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((u4_temp >> i) & 0x01); \
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} \
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}
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/**
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*******************************************************************************
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*! Bit manipulation macros
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*******************************************************************************
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*/
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#define SETBIT(a, i) ((a) |= (1 << (i)))
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#define CLEARBIT(a, i) ((a) &= ~(1 << (i)))
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/**
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*******************************************************************************
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*! Cabac module expect atlesat MIN_STREAM_SIZE_MB bytes left in stream buffer
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*! for encoding an MB
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*******************************************************************************
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*/
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#define MIN_STREAM_SIZE_MB 1024
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/*****************************************************************************/
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/* Function Declarations */
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/*****************************************************************************/
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void ih264e_init_cabac_table(entropy_ctxt_t *ps_ent_ctxt);
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void ih264e_init_cabac_ctxt(entropy_ctxt_t *ps_ent_ctxt);
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UWORD32 ih264e_cabac_UEGk0_binarization(WORD16 i2_sufs, WORD8 *pi1_bins_len);
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void ih264e_get_cabac_context(entropy_ctxt_t *ps_ent_ctxt, WORD32 u4_mb_type);
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IH264E_ERROR_T ih264e_cabac_flush(cabac_ctxt_t *ps_cabac_ctxt);
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IH264E_ERROR_T ih264e_cabac_put_byte(cabac_ctxt_t *ps_cabac_ctxt);
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void ih264e_cabac_encode_bin(cabac_ctxt_t *ps_cabac, WORD32 bin,
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bin_ctxt_model *pu1_bin_ctxts);
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void ih264e_encode_decision_bins(UWORD32 u4_bins, WORD8 i1_bins_len,
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UWORD32 u4_ctx_inc, WORD8 i1_valid_len,
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bin_ctxt_model *pu1_bin_ctxt_type,
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cabac_ctxt_t *ps_cabac);
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void ih264e_cabac_encode_terminate(cabac_ctxt_t *ps_cabac, WORD32 term_bin);
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void ih264e_cabac_encode_bypass_bin(cabac_ctxt_t *ps_cabac, WORD32 bin);
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void ih264e_cabac_encode_bypass_bins(cabac_ctxt_t *ps_cabac, UWORD32 u4_bins,
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WORD32 num_bins);
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IH264E_ERROR_T ih264e_write_islice_mb_cabac(entropy_ctxt_t *ps_ent_ctxt);
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IH264E_ERROR_T ih264e_write_pslice_mb_cabac(entropy_ctxt_t *ps_ent_ctxt);
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IH264E_ERROR_T ih264e_write_bslice_mb_cabac(entropy_ctxt_t *ps_ent_ctxt);
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#endif /* _IH264E_CABAC_H_ */
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