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93 lines
3.0 KiB
93 lines
3.0 KiB
/* |
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* MPEG1/2 decoder tables |
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* copyright (c) 2000,2001 Fabrice Bellard |
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* copyright (c) 2002-2004 Michael Niedermayer <michaelni@gmx.at> |
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* |
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* This file is part of FFmpeg. |
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* |
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* FFmpeg is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU Lesser General Public |
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* License as published by the Free Software Foundation; either |
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* version 2.1 of the License, or (at your option) any later version. |
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* |
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* FFmpeg is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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* Lesser General Public License for more details. |
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* |
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* You should have received a copy of the GNU Lesser General Public |
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* License along with FFmpeg; if not, write to the Free Software |
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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*/ |
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/** |
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* @file libavcodec/mpeg12decdata.h |
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* MPEG1/2 decoder tables. |
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*/ |
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#ifndef AVCODEC_MPEG12DECDATA_H |
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#define AVCODEC_MPEG12DECDATA_H |
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#include <stdint.h> |
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#include "mpegvideo.h" |
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#define MB_TYPE_ZERO_MV 0x20000000 |
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#define IS_ZERO_MV(a) ((a)&MB_TYPE_ZERO_MV) |
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static const uint8_t table_mb_ptype[7][2] = { |
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{ 3, 5 }, // 0x01 MB_INTRA |
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{ 1, 2 }, // 0x02 MB_PAT |
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{ 1, 3 }, // 0x08 MB_FOR |
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{ 1, 1 }, // 0x0A MB_FOR|MB_PAT |
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{ 1, 6 }, // 0x11 MB_QUANT|MB_INTRA |
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{ 1, 5 }, // 0x12 MB_QUANT|MB_PAT |
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{ 2, 5 }, // 0x1A MB_QUANT|MB_FOR|MB_PAT |
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}; |
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static const uint32_t ptype2mb_type[7] = { |
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MB_TYPE_INTRA, |
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MB_TYPE_L0 | MB_TYPE_CBP | MB_TYPE_ZERO_MV | MB_TYPE_16x16, |
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MB_TYPE_L0, |
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MB_TYPE_L0 | MB_TYPE_CBP, |
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MB_TYPE_QUANT | MB_TYPE_INTRA, |
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MB_TYPE_QUANT | MB_TYPE_L0 | MB_TYPE_CBP | MB_TYPE_ZERO_MV | MB_TYPE_16x16, |
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MB_TYPE_QUANT | MB_TYPE_L0 | MB_TYPE_CBP, |
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}; |
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static const uint8_t table_mb_btype[11][2] = { |
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{ 3, 5 }, // 0x01 MB_INTRA |
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{ 2, 3 }, // 0x04 MB_BACK |
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{ 3, 3 }, // 0x06 MB_BACK|MB_PAT |
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{ 2, 4 }, // 0x08 MB_FOR |
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{ 3, 4 }, // 0x0A MB_FOR|MB_PAT |
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{ 2, 2 }, // 0x0C MB_FOR|MB_BACK |
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{ 3, 2 }, // 0x0E MB_FOR|MB_BACK|MB_PAT |
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{ 1, 6 }, // 0x11 MB_QUANT|MB_INTRA |
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{ 2, 6 }, // 0x16 MB_QUANT|MB_BACK|MB_PAT |
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{ 3, 6 }, // 0x1A MB_QUANT|MB_FOR|MB_PAT |
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{ 2, 5 }, // 0x1E MB_QUANT|MB_FOR|MB_BACK|MB_PAT |
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}; |
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static const uint32_t btype2mb_type[11] = { |
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MB_TYPE_INTRA, |
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MB_TYPE_L1, |
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MB_TYPE_L1 | MB_TYPE_CBP, |
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MB_TYPE_L0, |
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MB_TYPE_L0 | MB_TYPE_CBP, |
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MB_TYPE_L0L1, |
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MB_TYPE_L0L1 | MB_TYPE_CBP, |
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MB_TYPE_QUANT | MB_TYPE_INTRA, |
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MB_TYPE_QUANT | MB_TYPE_L1 | MB_TYPE_CBP, |
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MB_TYPE_QUANT | MB_TYPE_L0 | MB_TYPE_CBP, |
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MB_TYPE_QUANT | MB_TYPE_L0L1 | MB_TYPE_CBP, |
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}; |
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static const uint8_t non_linear_qscale[32] = { |
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0, 1, 2, 3, 4, 5, 6, 7, |
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8,10,12,14,16,18,20,22, |
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24,28,32,36,40,44,48,52, |
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56,64,72,80,88,96,104,112, |
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}; |
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#endif /* AVCODEC_MPEG12DECDATA_H */
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