Go to most recent revision | Details | Last modification | View Log | RSS feed
| Rev | Author | Line No. | Line |
|---|---|---|---|
| 4349 | Serge | 1 | /* |
| 2 | * MPEG1/2 common code |
||
| 3 | * Copyright (c) 2007 Aurelien Jacobs |
||
| 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 */ |