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/*
* 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,
};
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