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| Rev | Author | Line No. | Line |
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| 4349 | Serge | 1 | /* |
| 2 | * H.26L/H.264/AVC/JVT/14496-10/... encoder/decoder |
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| 3 | * Copyright (c) 2003 Michael Niedermayer |
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| 4 | * |
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| 5 | * This file is part of FFmpeg. |
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| 6 | * |
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| 7 | * FFmpeg is free software; you can redistribute it and/or |
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| 8 | * modify it under the terms of the GNU Lesser General Public |
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| 9 | * License as published by the Free Software Foundation; either |
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| 10 | * version 2.1 of the License, or (at your option) any later version. |
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| 11 | * |
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| 12 | * FFmpeg is distributed in the hope that it will be useful, |
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| 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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| 15 | * Lesser General Public License for more details. |
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| 16 | * |
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| 17 | * You should have received a copy of the GNU Lesser General Public |
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| 18 | * License along with FFmpeg; if not, write to the Free Software |
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| 19 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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| 20 | */ |
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| 21 | |||
| 22 | /** |
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| 23 | * @file |
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| 24 | * Context Adaptive Binary Arithmetic Coder. |
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| 25 | */ |
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| 26 | |||
| 27 | #ifndef AVCODEC_CABAC_H |
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| 28 | #define AVCODEC_CABAC_H |
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| 29 | |||
| 30 | #include |
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| 31 | |||
| 32 | #include "put_bits.h" |
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| 33 | |||
| 34 | #define H264_NORM_SHIFT_OFFSET 0 |
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| 35 | #define H264_LPS_RANGE_OFFSET 512 |
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| 36 | #define H264_MLPS_STATE_OFFSET 1024 |
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| 37 | #define H264_LAST_COEFF_FLAG_OFFSET_8x8_OFFSET 1280 |
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| 38 | |||
| 39 | #define CABAC_BITS 16 |
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| 40 | #define CABAC_MASK ((1< |
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| 41 | |||
| 42 | typedef struct CABACContext{ |
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| 43 | int low; |
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| 44 | int range; |
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| 45 | int outstanding_count; |
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| 46 | const uint8_t *bytestream_start; |
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| 47 | const uint8_t *bytestream; |
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| 48 | const uint8_t *bytestream_end; |
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| 49 | PutBitContext pb; |
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| 50 | }CABACContext; |
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| 51 | |||
| 52 | void ff_init_cabac_encoder(CABACContext *c, uint8_t *buf, int buf_size); |
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| 53 | void ff_init_cabac_decoder(CABACContext *c, const uint8_t *buf, int buf_size); |
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| 54 | void ff_init_cabac_states(void); |
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| 55 | |||
| 56 | #endif /* AVCODEC_CABAC_H */ |