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