| /* |
| * MPEG-1/2 common code |
| * Copyright (c) 2007 Aurelien Jacobs <aurel@gnuage.org> |
| * |
| * This file is part of FFmpeg. |
| * |
| * FFmpeg is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU Lesser General Public |
| * License as published by the Free Software Foundation; either |
| * version 2.1 of the License, or (at your option) any later version. |
| * |
| * FFmpeg is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| * Lesser General Public License for more details. |
| * |
| * You should have received a copy of the GNU Lesser General Public |
| * License along with FFmpeg; if not, write to the Free Software |
| * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| */ |
| |
| #ifndef AVCODEC_MPEG12_H |
| #define AVCODEC_MPEG12_H |
| |
| #include "mpeg12vlc.h" |
| #include "mpegvideo.h" |
| |
| extern uint8_t ff_mpeg12_static_rl_table_store[2][2][2*MAX_RUN + MAX_LEVEL + 3]; |
| |
| void ff_mpeg12_common_init(MpegEncContext *s); |
| |
| #define INIT_2D_VLC_RL(rl, static_size, flags)\ |
| {\ |
| static RL_VLC_ELEM rl_vlc_table[static_size];\ |
| rl.rl_vlc[0] = rl_vlc_table;\ |
| ff_init_2d_vlc_rl(&rl, static_size, flags);\ |
| } |
| |
| void ff_init_2d_vlc_rl(RLTable *rl, unsigned static_size, int flags); |
| void ff_mpeg1_init_uni_ac_vlc(const RLTable *rl, uint8_t *uni_ac_vlc_len); |
| |
| static inline int decode_dc(GetBitContext *gb, int component) |
| { |
| int code, diff; |
| |
| if (component == 0) { |
| code = get_vlc2(gb, ff_dc_lum_vlc.table, DC_VLC_BITS, 2); |
| } else { |
| code = get_vlc2(gb, ff_dc_chroma_vlc.table, DC_VLC_BITS, 2); |
| } |
| if (code == 0) { |
| diff = 0; |
| } else { |
| diff = get_xbits(gb, code); |
| } |
| return diff; |
| } |
| |
| int ff_mpeg1_decode_block_intra(GetBitContext *gb, |
| const uint16_t *quant_matrix, |
| uint8_t *const scantable, int last_dc[3], |
| int16_t *block, int index, int qscale); |
| |
| void ff_mpeg1_clean_buffers(MpegEncContext *s); |
| int ff_mpeg1_find_frame_end(ParseContext *pc, const uint8_t *buf, int buf_size, AVCodecParserContext *s); |
| |
| void ff_mpeg1_encode_picture_header(MpegEncContext *s, int picture_number); |
| void ff_mpeg1_encode_mb(MpegEncContext *s, int16_t block[8][64], |
| int motion_x, int motion_y); |
| void ff_mpeg1_encode_init(MpegEncContext *s); |
| void ff_mpeg1_encode_slice_header(MpegEncContext *s); |
| |
| void ff_mpeg12_find_best_frame_rate(AVRational frame_rate, |
| int *code, int *ext_n, int *ext_d, |
| int nonstandard); |
| |
| #endif /* AVCODEC_MPEG12_H */ |