blob: f551504b8cc749612a99af14e302a9b0268f4246
| 1 | /* |
| 2 | * MPEG-1/2 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 "mpeg12vlc.h" |
| 26 | #include "mpegvideo.h" |
| 27 | |
| 28 | extern uint8_t ff_mpeg12_static_rl_table_store[2][2][2*MAX_RUN + MAX_LEVEL + 3]; |
| 29 | |
| 30 | void ff_mpeg12_common_init(MpegEncContext *s); |
| 31 | |
| 32 | #define INIT_2D_VLC_RL(rl, static_size, flags)\ |
| 33 | {\ |
| 34 | static RL_VLC_ELEM rl_vlc_table[static_size];\ |
| 35 | rl.rl_vlc[0] = rl_vlc_table;\ |
| 36 | ff_init_2d_vlc_rl(&rl, static_size, flags);\ |
| 37 | } |
| 38 | |
| 39 | void ff_init_2d_vlc_rl(RLTable *rl, unsigned static_size, int flags); |
| 40 | |
| 41 | static inline int decode_dc(GetBitContext *gb, int component) |
| 42 | { |
| 43 | int code, diff; |
| 44 | |
| 45 | if (component == 0) { |
| 46 | code = get_vlc2(gb, ff_dc_lum_vlc.table, DC_VLC_BITS, 2); |
| 47 | } else { |
| 48 | code = get_vlc2(gb, ff_dc_chroma_vlc.table, DC_VLC_BITS, 2); |
| 49 | } |
| 50 | if (code < 0){ |
| 51 | av_log(NULL, AV_LOG_ERROR, "invalid dc code at\n"); |
| 52 | return 0xffff; |
| 53 | } |
| 54 | if (code == 0) { |
| 55 | diff = 0; |
| 56 | } else { |
| 57 | diff = get_xbits(gb, code); |
| 58 | } |
| 59 | return diff; |
| 60 | } |
| 61 | |
| 62 | int ff_mpeg1_decode_block_intra(GetBitContext *gb, |
| 63 | const uint16_t *quant_matrix, |
| 64 | uint8_t *const scantable, int last_dc[3], |
| 65 | int16_t *block, int index, int qscale); |
| 66 | |
| 67 | void ff_mpeg1_clean_buffers(MpegEncContext *s); |
| 68 | int ff_mpeg1_find_frame_end(ParseContext *pc, const uint8_t *buf, int buf_size, AVCodecParserContext *s); |
| 69 | |
| 70 | void ff_mpeg1_encode_picture_header(MpegEncContext *s, int picture_number); |
| 71 | void ff_mpeg1_encode_mb(MpegEncContext *s, int16_t block[8][64], |
| 72 | int motion_x, int motion_y); |
| 73 | void ff_mpeg1_encode_init(MpegEncContext *s); |
| 74 | void ff_mpeg1_encode_slice_header(MpegEncContext *s); |
| 75 | |
| 76 | #endif /* AVCODEC_MPEG12_H */ |
| 77 |