| Directory: | ../../../ffmpeg/ |
|---|---|
| File: | src/libavcodec/mpeg12dec.h |
| Date: | 2022-05-23 03:24:52 |
| Exec | Total | Coverage | |
|---|---|---|---|
| Lines: | 8 | 8 | 100.0% |
| Branches: | 4 | 4 | 100.0% |
| Line | Branch | Exec | Source |
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| 1 | /* | ||
| 2 | * MPEG-1/2 decoder header | ||
| 3 | * Copyright (c) 2007 Aurelien Jacobs <aurel@gnuage.org> | ||
| 4 | * | ||
| 5 | * This file is part of FFmpeg. | ||
| 6 | * | ||
| 7 | * FFmpeg is free software; you can redistribute it and/or | ||
| 8 | * modify it under the terms of the GNU Lesser General Public | ||
| 9 | * License as published by the Free Software Foundation; either | ||
| 10 | * version 2.1 of the License, or (at your option) any later version. | ||
| 11 | * | ||
| 12 | * FFmpeg is distributed in the hope that it will be useful, | ||
| 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | ||
| 15 | * Lesser General Public License for more details. | ||
| 16 | * | ||
| 17 | * You should have received a copy of the GNU Lesser General Public | ||
| 18 | * License along with FFmpeg; if not, write to the Free Software | ||
| 19 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | ||
| 20 | */ | ||
| 21 | |||
| 22 | #ifndef AVCODEC_MPEG12DEC_H | ||
| 23 | #define AVCODEC_MPEG12DEC_H | ||
| 24 | |||
| 25 | #include "get_bits.h" | ||
| 26 | #include "mpeg12vlc.h" | ||
| 27 | #include "rl.h" | ||
| 28 | |||
| 29 | #define INIT_2D_VLC_RL(rl, static_size, flags)\ | ||
| 30 | {\ | ||
| 31 | static RL_VLC_ELEM rl_vlc_table[static_size];\ | ||
| 32 | rl.rl_vlc[0] = rl_vlc_table;\ | ||
| 33 | ff_init_2d_vlc_rl(&rl, static_size, flags);\ | ||
| 34 | } | ||
| 35 | |||
| 36 | void ff_init_2d_vlc_rl(RLTable *rl, unsigned static_size, int flags); | ||
| 37 | |||
| 38 | 1901532 | static inline int decode_dc(GetBitContext *gb, int component) | |
| 39 | { | ||
| 40 | int code, diff; | ||
| 41 | |||
| 42 |
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1901532 | if (component == 0) { |
| 43 | 1195944 | code = get_vlc2(gb, ff_dc_lum_vlc.table, DC_VLC_BITS, 2); | |
| 44 | } else { | ||
| 45 | 705588 | code = get_vlc2(gb, ff_dc_chroma_vlc.table, DC_VLC_BITS, 2); | |
| 46 | } | ||
| 47 |
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1901532 | if (code == 0) { |
| 48 | 265119 | diff = 0; | |
| 49 | } else { | ||
| 50 | 1636413 | diff = get_xbits(gb, code); | |
| 51 | } | ||
| 52 | 1901532 | return diff; | |
| 53 | } | ||
| 54 | |||
| 55 | int ff_mpeg1_decode_block_intra(GetBitContext *gb, | ||
| 56 | const uint16_t *quant_matrix, | ||
| 57 | const uint8_t *scantable, int last_dc[3], | ||
| 58 | int16_t *block, int index, int qscale); | ||
| 59 | |||
| 60 | #endif /* AVCODEC_MPEG12DEC_H */ | ||
| 61 |