| Line | Branch | Exec | Source |
|---|---|---|---|
| 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 | |||
| 28 | #define MB_TYPE_ZERO_MV MB_TYPE_CODEC_SPECIFIC | ||
| 29 | |||
| 30 | 2157161 | static inline int decode_dc(GetBitContext *gb, int component) | |
| 31 | { | ||
| 32 | int code, diff; | ||
| 33 | |||
| 34 |
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2157161 | if (component == 0) { |
| 35 | 1365903 | code = get_vlc2(gb, ff_dc_lum_vlc, DC_VLC_BITS, 2); | |
| 36 | } else { | ||
| 37 | 791258 | code = get_vlc2(gb, ff_dc_chroma_vlc, DC_VLC_BITS, 2); | |
| 38 | } | ||
| 39 |
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2157161 | if (code == 0) { |
| 40 | 299070 | diff = 0; | |
| 41 | } else { | ||
| 42 | 1858091 | diff = get_xbits(gb, code); | |
| 43 | } | ||
| 44 | 2157161 | return diff; | |
| 45 | } | ||
| 46 | |||
| 47 | int ff_mpeg1_decode_block_intra(GetBitContext *gb, | ||
| 48 | const uint16_t *quant_matrix, | ||
| 49 | const uint8_t *scantable, int last_dc[3], | ||
| 50 | int16_t *block, int index, int qscale); | ||
| 51 | |||
| 52 | #endif /* AVCODEC_MPEG12DEC_H */ | ||
| 53 |