| /****************************************************************************** |
| * |
| * 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 |
| * ih264e_cabac.h |
| * |
| * @brief |
| * This file contains declarations necessary for cabac encoding |
| * |
| * @author |
| * ittiam |
| * |
| * @remarks |
| * none |
| * |
| ******************************************************************************* |
| */ |
| |
| #ifndef _IH264E_CABAC_H_ |
| #define _IH264E_CABAC_H_ |
| |
| /*****************************************************************************/ |
| /* Macros */ |
| /*****************************************************************************/ |
| |
| /** |
| ******************************************************************************* |
| * @brief Bit precision of cabac engine; |
| ******************************************************************************* |
| */ |
| #define CABAC_BITS 9 |
| |
| /** |
| ******************************************************************************* |
| * @macro Reverse bits in an unsigned integer |
| ******************************************************************************* |
| */ |
| #define REV(u4_input, u4_output) \ |
| { \ |
| UWORD32 u4_temp = (u4_input); \ |
| WORD8 i; \ |
| u4_output = 0; \ |
| for (i = 0; i < 32; i++) \ |
| { \ |
| u4_output = (u4_output << 1) + \ |
| ((u4_temp >> i) & 0x01); \ |
| } \ |
| } |
| |
| /** |
| ******************************************************************************* |
| *! Bit manipulation macros |
| ******************************************************************************* |
| */ |
| #define SETBIT(a, i) ((a) |= (1 << (i))) |
| #define CLEARBIT(a, i) ((a) &= ~(1 << (i))) |
| |
| /** |
| ******************************************************************************* |
| *! Cabac module expect atlesat MIN_STREAM_SIZE_MB bytes left in stream buffer |
| *! for encoding an MB |
| ******************************************************************************* |
| */ |
| #define MIN_STREAM_SIZE_MB 1024 |
| |
| |
| /*****************************************************************************/ |
| /* Function Declarations */ |
| /*****************************************************************************/ |
| |
| void ih264e_init_cabac_table(entropy_ctxt_t *ps_ent_ctxt); |
| |
| void ih264e_init_cabac_ctxt(entropy_ctxt_t *ps_ent_ctxt); |
| |
| UWORD32 ih264e_cabac_UEGk0_binarization(WORD16 i2_sufs, WORD8 *pi1_bins_len); |
| |
| void ih264e_get_cabac_context(entropy_ctxt_t *ps_ent_ctxt, WORD32 u4_mb_type); |
| |
| IH264E_ERROR_T ih264e_cabac_flush(cabac_ctxt_t *ps_cabac_ctxt); |
| |
| IH264E_ERROR_T ih264e_cabac_put_byte(cabac_ctxt_t *ps_cabac_ctxt); |
| |
| void ih264e_cabac_encode_bin(cabac_ctxt_t *ps_cabac, WORD32 bin, |
| bin_ctxt_model *pu1_bin_ctxts); |
| |
| void ih264e_encode_decision_bins(UWORD32 u4_bins, WORD8 i1_bins_len, |
| UWORD32 u4_ctx_inc, WORD8 i1_valid_len, |
| bin_ctxt_model *pu1_bin_ctxt_type, |
| cabac_ctxt_t *ps_cabac); |
| |
| void ih264e_cabac_encode_terminate(cabac_ctxt_t *ps_cabac, WORD32 term_bin); |
| |
| void ih264e_cabac_encode_bypass_bin(cabac_ctxt_t *ps_cabac, WORD32 bin); |
| |
| void ih264e_cabac_encode_bypass_bins(cabac_ctxt_t *ps_cabac, UWORD32 u4_bins, |
| WORD32 num_bins); |
| |
| IH264E_ERROR_T ih264e_write_islice_mb_cabac(entropy_ctxt_t *ps_ent_ctxt); |
| |
| IH264E_ERROR_T ih264e_write_pslice_mb_cabac(entropy_ctxt_t *ps_ent_ctxt); |
| |
| IH264E_ERROR_T ih264e_write_bslice_mb_cabac(entropy_ctxt_t *ps_ent_ctxt); |
| |
| #endif /* _IH264E_CABAC_H_ */ |