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Diffstat (limited to 'libavcodec/h261data.c')
| -rw-r--r-- | libavcodec/h261data.c | 155 |
1 files changed, 155 insertions, 0 deletions
diff --git a/libavcodec/h261data.c b/libavcodec/h261data.c new file mode 100644 index 0000000000..a05161f4bc --- /dev/null +++ b/libavcodec/h261data.c @@ -0,0 +1,155 @@ +/* + * copyright (c) 2002-2004 Michael Niedermayer <michaelni@gmx.at> + * copyright (c) 2004 Maarten Daniels + * + * This file is part of FFmpeg. + * + * FFmpeg is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2.1 of the License, or (at your option) any later version. + * + * FFmpeg is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with FFmpeg; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + */ + +/** + * @file + * H.261 tables. + */ + +#include <stdint.h> +#include "h261.h" +#include "h261data.h" + +// H.261 VLC table for macroblock addressing +const uint8_t ff_h261_mba_code[35] = { + 1, 3, 2, 3, + 2, 3, 2, 7, + 6, 11, 10, 9, + 8, 7, 6, 23, + 22, 21, 20, 19, + 18, 35, 34, 33, + 32, 31, 30, 29, + 28, 27, 26, 25, + 24, + 15, //(MBA stuffing) + 1 //(start code) +}; + +const uint8_t ff_h261_mba_bits[35] = { + 1, 3, 3, 4, + 4, 5, 5, 7, + 7, 8, 8, 8, + 8, 8, 8, 10, + 10, 10, 10, 10, + 10, 11, 11, 11, + 11, 11, 11, 11, + 11, 11, 11, 11, + 11, + 11, //(MBA stuffing) + 16 //(start code) +}; + +//H.261 VLC table for macroblock type +const uint8_t ff_h261_mtype_code[10] = { + 1, 1, 1, 1, + 1, 1, 1, 1, + 1, 1 +}; + +const uint8_t ff_h261_mtype_bits[10] = { + 4, 7, 1, 5, + 9, 8, 10, 3, + 2, 6 +}; + +const int ff_h261_mtype_map[10]= { + MB_TYPE_INTRA4x4, + MB_TYPE_INTRA4x4 | MB_TYPE_QUANT, + MB_TYPE_CBP, + MB_TYPE_QUANT | MB_TYPE_CBP, + MB_TYPE_16x16, + MB_TYPE_CBP | MB_TYPE_16x16, + MB_TYPE_QUANT | MB_TYPE_CBP | MB_TYPE_16x16, + MB_TYPE_16x16 | MB_TYPE_H261_FIL, + MB_TYPE_CBP | MB_TYPE_16x16 | MB_TYPE_H261_FIL, + MB_TYPE_QUANT | MB_TYPE_CBP | MB_TYPE_16x16 | MB_TYPE_H261_FIL +}; + +//H.261 VLC table for motion vectors +const uint8_t ff_h261_mv_tab[17][2] = { + {1,1}, {1,2}, {1,3}, {1,4}, {3,6}, {5,7}, {4,7}, {3,7}, + {11,9}, {10,9}, {9,9}, {17,10}, {16,10}, {15,10}, {14,10}, {13,10}, {12,10} +}; + +//H.261 VLC table for coded block pattern +const uint8_t ff_h261_cbp_tab[63][2] = +{ + {11,5}, {9,5}, {13,6}, {13,4}, {23,7}, {19,7}, {31,8}, {12,4}, + {22,7}, {18,7}, {30,8}, {19,5}, {27,8}, {23,8}, {19,8}, {11,4}, + {21,7}, {17,7}, {29,8}, {17,5}, {25,8}, {21,8}, {17,8}, {15,6}, + {15,8}, {13,8}, {3,9}, {15,5}, {11,8}, {7,8}, {7,9}, {10,4}, + {20,7}, {16,7}, {28,8}, {14,6}, {14,8}, {12,8}, {2,9}, {16,5}, + {24,8}, {20,8}, {16,8}, {14,5}, {10,8}, {6,8}, {6,9}, {18,5}, + {26,8}, {22,8}, {18,8}, {13,5}, {9,8}, {5,8}, {5,9}, {12,5}, + {8,8}, {4,8}, {4,9}, {7,3}, {10,5}, {8,5}, {12,6} +}; + +//H.261 VLC table for transform coefficients +static const uint16_t h261_tcoeff_vlc[65][2] = { +{ 0x2, 2 }, { 0x3, 2 },{ 0x4, 4 },{ 0x5, 5 }, +{ 0x6, 7 },{ 0x26, 8 },{ 0x21, 8 },{ 0xa, 10 }, +{ 0x1d, 12 },{ 0x18, 12 },{ 0x13, 12 },{ 0x10 , 12 }, +{ 0x1a, 13},{ 0x19, 13 }, { 0x18, 13 }, { 0x17, 13 }, +{ 0x3, 3 }, { 0x6, 6 }, { 0x25 , 8 }, { 0xc, 10 }, +{ 0x1b, 12 }, { 0x16, 13 }, { 0x15, 13 }, { 0x5, 4}, +{ 0x4, 7}, { 0xb, 10 }, { 0x14, 12 }, { 0x14, 13 }, +{ 0x7, 5 }, { 0x24, 8 }, { 0x1c, 12 }, { 0x13, 13 }, +{ 0x6, 5 }, { 0xf, 10 }, { 0x12, 12}, { 0x7, 6}, +{ 0x9 , 10 }, { 0x12, 13 }, { 0x5, 6 }, { 0x1e, 12 }, +{ 0x4, 6 }, { 0x15, 12 }, { 0x7, 7 }, { 0x11, 12}, +{ 0x5, 7 }, { 0x11, 13 }, { 0x27, 8 }, { 0x10, 13 }, +{ 0x23, 8 }, { 0x22, 8 }, { 0x20, 8 }, { 0xe , 10 }, +{ 0xd, 10 }, { 0x8, 10 },{ 0x1f, 12 }, { 0x1a, 12 }, +{ 0x19, 12 }, { 0x17, 12 }, { 0x16, 12}, { 0x1f, 13}, +{ 0x1e, 13 }, { 0x1d, 13 }, { 0x1c, 13}, { 0x1b, 13}, +{ 0x1, 6 } //escape +}; + +static const int8_t h261_tcoeff_level[64] = { + 0, 1, 2, 3, 4, 5, 6, 7, + 8, 9, 10, 11, 12, 13, 14, 15, + 1, 2, 3, 4, 5, 6, 7, 1, + 2, 3, 4, 5, 1, 2, 3, 4, + 1, 2, 3, 1, 2, 3, 1, 2, + 1, 2, 1, 2, 1, 2, 1, 2, + 1, 1, 1, 1, 1, 1, 1, 1, + 1, 1, 1, 1, 1, 1, 1, 1 +}; + +static const int8_t h261_tcoeff_run[64] = { + 0, + 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 1, + 1, 1, 1, 1, 1, 1, 2, 2, + 2, 2, 2, 3, 3, 3, 3, 4, + 4, 4, 5, 5, 5, 6, 6, 7, + 7, 8, 8, 9, 9, 10, 10, 11, + 12, 13, 14, 15, 16, 17, 18, 19, + 20, 21, 22, 23, 24, 25, 26 +}; + +RLTable ff_h261_rl_tcoeff = { + 64, + 64, + h261_tcoeff_vlc, + h261_tcoeff_run, + h261_tcoeff_level, +}; |