Libav 0.7.1
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00001 /* 00002 * MPEG1/2 decoder tables 00003 * copyright (c) 2000,2001 Fabrice Bellard 00004 * copyright (c) 2002-2004 Michael Niedermayer <michaelni@gmx.at> 00005 * 00006 * This file is part of Libav. 00007 * 00008 * Libav is free software; you can redistribute it and/or 00009 * modify it under the terms of the GNU Lesser General Public 00010 * License as published by the Free Software Foundation; either 00011 * version 2.1 of the License, or (at your option) any later version. 00012 * 00013 * Libav is distributed in the hope that it will be useful, 00014 * but WITHOUT ANY WARRANTY; without even the implied warranty of 00015 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 00016 * Lesser General Public License for more details. 00017 * 00018 * You should have received a copy of the GNU Lesser General Public 00019 * License along with Libav; if not, write to the Free Software 00020 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 00021 */ 00022 00028 #ifndef AVCODEC_MPEG12DECDATA_H 00029 #define AVCODEC_MPEG12DECDATA_H 00030 00031 #include <stdint.h> 00032 #include "mpegvideo.h" 00033 00034 00035 #define MB_TYPE_ZERO_MV 0x20000000 00036 #define IS_ZERO_MV(a) ((a)&MB_TYPE_ZERO_MV) 00037 00038 static const uint8_t table_mb_ptype[7][2] = { 00039 { 3, 5 }, // 0x01 MB_INTRA 00040 { 1, 2 }, // 0x02 MB_PAT 00041 { 1, 3 }, // 0x08 MB_FOR 00042 { 1, 1 }, // 0x0A MB_FOR|MB_PAT 00043 { 1, 6 }, // 0x11 MB_QUANT|MB_INTRA 00044 { 1, 5 }, // 0x12 MB_QUANT|MB_PAT 00045 { 2, 5 }, // 0x1A MB_QUANT|MB_FOR|MB_PAT 00046 }; 00047 00048 static const uint32_t ptype2mb_type[7] = { 00049 MB_TYPE_INTRA, 00050 MB_TYPE_L0 | MB_TYPE_CBP | MB_TYPE_ZERO_MV | MB_TYPE_16x16, 00051 MB_TYPE_L0, 00052 MB_TYPE_L0 | MB_TYPE_CBP, 00053 MB_TYPE_QUANT | MB_TYPE_INTRA, 00054 MB_TYPE_QUANT | MB_TYPE_L0 | MB_TYPE_CBP | MB_TYPE_ZERO_MV | MB_TYPE_16x16, 00055 MB_TYPE_QUANT | MB_TYPE_L0 | MB_TYPE_CBP, 00056 }; 00057 00058 static const uint8_t table_mb_btype[11][2] = { 00059 { 3, 5 }, // 0x01 MB_INTRA 00060 { 2, 3 }, // 0x04 MB_BACK 00061 { 3, 3 }, // 0x06 MB_BACK|MB_PAT 00062 { 2, 4 }, // 0x08 MB_FOR 00063 { 3, 4 }, // 0x0A MB_FOR|MB_PAT 00064 { 2, 2 }, // 0x0C MB_FOR|MB_BACK 00065 { 3, 2 }, // 0x0E MB_FOR|MB_BACK|MB_PAT 00066 { 1, 6 }, // 0x11 MB_QUANT|MB_INTRA 00067 { 2, 6 }, // 0x16 MB_QUANT|MB_BACK|MB_PAT 00068 { 3, 6 }, // 0x1A MB_QUANT|MB_FOR|MB_PAT 00069 { 2, 5 }, // 0x1E MB_QUANT|MB_FOR|MB_BACK|MB_PAT 00070 }; 00071 00072 static const uint32_t btype2mb_type[11] = { 00073 MB_TYPE_INTRA, 00074 MB_TYPE_L1, 00075 MB_TYPE_L1 | MB_TYPE_CBP, 00076 MB_TYPE_L0, 00077 MB_TYPE_L0 | MB_TYPE_CBP, 00078 MB_TYPE_L0L1, 00079 MB_TYPE_L0L1 | MB_TYPE_CBP, 00080 MB_TYPE_QUANT | MB_TYPE_INTRA, 00081 MB_TYPE_QUANT | MB_TYPE_L1 | MB_TYPE_CBP, 00082 MB_TYPE_QUANT | MB_TYPE_L0 | MB_TYPE_CBP, 00083 MB_TYPE_QUANT | MB_TYPE_L0L1 | MB_TYPE_CBP, 00084 }; 00085 00086 static const uint8_t non_linear_qscale[32] = { 00087 0, 1, 2, 3, 4, 5, 6, 7, 00088 8,10,12,14,16,18,20,22, 00089 24,28,32,36,40,44,48,52, 00090 56,64,72,80,88,96,104,112, 00091 }; 00092 00093 #endif /* AVCODEC_MPEG12DECDATA_H */