repositories / deb_ffmpeg.git / blame
| Commit | Line | Data |
|---|---|---|
| 2ba45a60 DM |
1 | /* |
| 2 | * MPEG1/2 common code | |
| 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_MPEG12_H | |
| 23 | #define AVCODEC_MPEG12_H | |
| 24 | ||
| 25 | #include "mpegvideo.h" | |
| 26 | ||
| 27 | #define DC_VLC_BITS 9 | |
| 28 | #define MV_VLC_BITS 9 | |
| 29 | #define TEX_VLC_BITS 9 | |
| 30 | ||
| 31 | #define MBINCR_VLC_BITS 9 | |
| 32 | #define MB_PAT_VLC_BITS 9 | |
| 33 | #define MB_PTYPE_VLC_BITS 6 | |
| 34 | #define MB_BTYPE_VLC_BITS 6 | |
| 35 | ||
| 36 | extern VLC ff_dc_lum_vlc; | |
| 37 | extern VLC ff_dc_chroma_vlc; | |
| 38 | extern VLC ff_mbincr_vlc; | |
| 39 | extern VLC ff_mb_ptype_vlc; | |
| 40 | extern VLC ff_mb_btype_vlc; | |
| 41 | extern VLC ff_mb_pat_vlc; | |
| 42 | extern VLC ff_mv_vlc; | |
| 43 | ||
| 44 | extern uint8_t ff_mpeg12_static_rl_table_store[2][2][2*MAX_RUN + MAX_LEVEL + 3]; | |
| 45 | ||
| 46 | void ff_mpeg12_common_init(MpegEncContext *s); | |
| 47 | void ff_mpeg12_init_vlcs(void); | |
| 48 | ||
| 49 | static inline int decode_dc(GetBitContext *gb, int component) | |
| 50 | { | |
| 51 | int code, diff; | |
| 52 | ||
| 53 | if (component == 0) { | |
| 54 | code = get_vlc2(gb, ff_dc_lum_vlc.table, DC_VLC_BITS, 2); | |
| 55 | } else { | |
| 56 | code = get_vlc2(gb, ff_dc_chroma_vlc.table, DC_VLC_BITS, 2); | |
| 57 | } | |
| 58 | if (code < 0){ | |
| 59 | av_log(NULL, AV_LOG_ERROR, "invalid dc code at\n"); | |
| 60 | return 0xffff; | |
| 61 | } | |
| 62 | if (code == 0) { | |
| 63 | diff = 0; | |
| 64 | } else { | |
| 65 | diff = get_xbits(gb, code); | |
| 66 | } | |
| 67 | return diff; | |
| 68 | } | |
| 69 | ||
| 70 | int ff_mpeg1_decode_block_intra(MpegEncContext *s, int16_t *block, int n); | |
| 71 | void ff_mpeg1_clean_buffers(MpegEncContext *s); | |
| 72 | int ff_mpeg1_find_frame_end(ParseContext *pc, const uint8_t *buf, int buf_size, AVCodecParserContext *s); | |
| 73 | ||
| 74 | #endif /* AVCODEC_MPEG12_H */ |