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116e2a9ee2
The codes can be easily calculated, so the table is unnecessary. Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
238 lines
8.0 KiB
C
238 lines
8.0 KiB
C
/*
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* Constants for DV codec
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* Copyright (c) 2002 Fabrice Bellard
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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
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* Constants for DV codec.
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*/
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#include <stdint.h>
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#include "dvdata.h"
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/* Specific zigzag scan for 248 idct. NOTE that unlike the
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* specification, we interleave the fields */
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const uint8_t ff_dv_zigzag248_direct[64] = {
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0, 8, 1, 9, 16, 24, 2, 10,
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17, 25, 32, 40, 48, 56, 33, 41,
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18, 26, 3, 11, 4, 12, 19, 27,
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34, 42, 49, 57, 50, 58, 35, 43,
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20, 28, 5, 13, 6, 14, 21, 29,
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36, 44, 51, 59, 52, 60, 37, 45,
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22, 30, 7, 15, 23, 31, 38, 46,
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53, 61, 54, 62, 39, 47, 55, 63,
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};
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/* unquant tables (not used directly) */
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const uint8_t ff_dv_quant_shifts[22][4] = {
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{ 3, 3, 4, 4 },
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{ 3, 3, 4, 4 },
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{ 2, 3, 3, 4 },
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{ 2, 3, 3, 4 },
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{ 2, 2, 3, 3 },
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{ 2, 2, 3, 3 },
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{ 1, 2, 2, 3 },
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{ 1, 2, 2, 3 },
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{ 1, 1, 2, 2 },
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{ 1, 1, 2, 2 },
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{ 0, 1, 1, 2 },
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{ 0, 1, 1, 2 },
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{ 0, 0, 1, 1 },
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{ 0, 0, 1, 1 },
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{ 0, 0, 0, 1 },
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{ 0, 0, 0, 0 },
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{ 0, 0, 0, 0 },
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{ 0, 0, 0, 0 },
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{ 0, 0, 0, 0 },
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{ 0, 0, 0, 0 },
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{ 0, 0, 0, 0 },
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{ 0, 0, 0, 0 },
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};
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const uint8_t ff_dv_quant_offset[4] = { 6, 3, 0, 1 };
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/*
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* There's a catch about the following three tables: the mapping they establish
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* between (run, level) and vlc is not 1-1. So you have to watch out for that
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* when building misc. tables. E.g. (1, 0) can be either 0x7cf or 0x1f82.
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*/
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const uint8_t ff_dv_vlc_len[NB_DV_VLC] = {
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2, 3, 4, 4, 4, 4, 5, 5, 5,
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5, 6, 6, 6, 6, 7, 7, 7,
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7, 7, 7, 7, 7, 8, 8, 8,
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8, 8, 8, 8, 8, 8, 8, 8,
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8, 8, 8, 8, 8, 9, 9, 9,
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9, 9, 9, 9, 9, 9, 9, 9,
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9, 9, 9, 9, 9, 10, 10, 10,
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10, 10, 10, 10, 11, 11, 11, 11,
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11, 11, 11, 11, 12, 12, 12, 12,
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12, 12, 12, 12, 12, 12, 12, 12,
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12, 12, 12, 12, 12, 12, 12, 12,
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13, 13, 13, 13, 13, 13, 13, 13,
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13, 13, 13, 13, 13, 13, 13, 13,
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13, 13, 13, 13, 13, 13, 13, 13,
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13, 13, 13, 13, 13, 13, 13, 13,
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13, 13, 13, 13, 13, 13, 13, 13,
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13, 13, 13, 13, 13, 13, 13, 13,
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13, 13, 13, 13, 13, 13, 13, 13,
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13, 13, 13, 13, 13, 13, 13, 13,
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15, 15, 15, 15, 15, 15, 15, 15,
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15, 15, 15, 15, 15, 15, 15, 15,
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15, 15, 15, 15, 15, 15, 15, 15,
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15, 15, 15, 15, 15, 15, 15, 15,
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15, 15, 15, 15, 15, 15, 15, 15,
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15, 15, 15, 15, 15, 15, 15, 15,
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15, 15, 15, 15, 15, 15, 15, 15,
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15, 15, 15, 15, 15, 15, 15, 15,
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15, 15, 15, 15, 15, 15, 15, 15,
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15, 15, 15, 15, 15, 15, 15, 15,
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15, 15, 15, 15, 15, 15, 15, 15,
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15, 15, 15, 15, 15, 15, 15, 15,
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15, 15, 15, 15, 15, 15, 15, 15,
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15, 15, 15, 15, 15, 15, 15, 15,
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15, 15, 15, 15, 15, 15, 15, 15,
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15, 15, 15, 15, 15, 15, 15, 15,
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15, 15, 15, 15, 15, 15, 15, 15,
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15, 15, 15, 15, 15, 15, 15, 15,
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15, 15, 15, 15, 15, 15, 15, 15,
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15, 15, 15, 15, 15, 15, 15, 15,
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15, 15, 15, 15, 15, 15, 15, 15,
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15, 15, 15, 15, 15, 15, 15, 15,
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15, 15, 15, 15, 15, 15, 15, 15,
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15, 15, 15, 15, 15, 15, 15, 15,
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15, 15, 15, 15, 15, 15, 15, 15,
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15, 15, 15, 15, 15, 15, 15, 15,
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15, 15, 15, 15, 15, 15, 15, 15,
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15, 15, 15, 15, 15, 15, 15, 15,
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15, 15, 15, 15, 15, 15, 15, 15,
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15, 15, 15, 15, 15, 15, 15, 15,
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15, 15, 15, 15, 15, 15, 15, 15,
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15, 15, 15, 15, 15, 15, 15, 15,
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};
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const uint8_t ff_dv_vlc_run[NB_DV_VLC] = {
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0, 0, 127, 1, 0, 0, 2, 1, 0,
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0, 3, 4, 0, 0, 5, 6, 2,
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1, 1, 0, 0, 0, 7, 8, 9,
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10, 3, 4, 2, 1, 1, 1, 0,
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0, 0, 0, 0, 0, 11, 12, 13,
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14, 5, 6, 3, 4, 2, 2, 1,
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0, 0, 0, 0, 0, 5, 3, 3,
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2, 1, 1, 1, 0, 1, 6, 4,
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3, 1, 1, 1, 2, 3, 4, 5,
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7, 8, 9, 10, 7, 8, 4, 3,
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2, 2, 2, 2, 2, 1, 1, 1,
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0, 1, 2, 3, 4, 5, 6, 7,
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8, 9, 10, 11, 12, 13, 14, 15,
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16, 17, 18, 19, 20, 21, 22, 23,
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24, 25, 26, 27, 28, 29, 30, 31,
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32, 33, 34, 35, 36, 37, 38, 39,
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40, 41, 42, 43, 44, 45, 46, 47,
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48, 49, 50, 51, 52, 53, 54, 55,
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56, 57, 58, 59, 60, 61, 62, 63,
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0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0,
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};
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const uint8_t ff_dv_vlc_level[NB_DV_VLC] = {
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1, 2, 0, 1, 3, 4, 1, 2, 5,
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6, 1, 1, 7, 8, 1, 1, 2,
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3, 4, 9, 10, 11, 1, 1, 1,
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1, 2, 2, 3, 5, 6, 7, 12,
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13, 14, 15, 16, 17, 1, 1, 1,
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1, 2, 2, 3, 3, 4, 5, 8,
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18, 19, 20, 21, 22, 3, 4, 5,
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6, 9, 10, 11, 0, 0, 3, 4,
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6, 12, 13, 14, 0, 0, 0, 0,
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2, 2, 2, 2, 3, 3, 5, 7,
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7, 8, 9, 10, 11, 15, 16, 17,
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0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0,
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0, 1, 2, 3, 4, 5, 6, 7,
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8, 9, 10, 11, 12, 13, 14, 15,
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16, 17, 18, 19, 20, 21, 22, 23,
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24, 25, 26, 27, 28, 29, 30, 31,
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32, 33, 34, 35, 36, 37, 38, 39,
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40, 41, 42, 43, 44, 45, 46, 47,
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48, 49, 50, 51, 52, 53, 54, 55,
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56, 57, 58, 59, 60, 61, 62, 63,
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64, 65, 66, 67, 68, 69, 70, 71,
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72, 73, 74, 75, 76, 77, 78, 79,
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80, 81, 82, 83, 84, 85, 86, 87,
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88, 89, 90, 91, 92, 93, 94, 95,
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96, 97, 98, 99, 100, 101, 102, 103,
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104, 105, 106, 107, 108, 109, 110, 111,
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112, 113, 114, 115, 116, 117, 118, 119,
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120, 121, 122, 123, 124, 125, 126, 127,
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128, 129, 130, 131, 132, 133, 134, 135,
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136, 137, 138, 139, 140, 141, 142, 143,
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144, 145, 146, 147, 148, 149, 150, 151,
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152, 153, 154, 155, 156, 157, 158, 159,
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160, 161, 162, 163, 164, 165, 166, 167,
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168, 169, 170, 171, 172, 173, 174, 175,
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176, 177, 178, 179, 180, 181, 182, 183,
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184, 185, 186, 187, 188, 189, 190, 191,
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192, 193, 194, 195, 196, 197, 198, 199,
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200, 201, 202, 203, 204, 205, 206, 207,
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208, 209, 210, 211, 212, 213, 214, 215,
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216, 217, 218, 219, 220, 221, 222, 223,
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224, 225, 226, 227, 228, 229, 230, 231,
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232, 233, 234, 235, 236, 237, 238, 239,
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240, 241, 242, 243, 244, 245, 246, 247,
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248, 249, 250, 251, 252, 253, 254, 255,
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};
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