| /* |
| * MPEG-1/2 decoder header |
| * Copyright (c) 2007 Aurelien Jacobs <[email protected]> |
| * |
| * 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_MPEG12DEC_H |
| #define AVCODEC_MPEG12DEC_H |
| |
| #include "get_bits.h" |
| #include "mpeg12vlc.h" |
| |
| #define MB_TYPE_ZERO_MV MB_TYPE_CODEC_SPECIFIC |
| |
| static inline int decode_dc(GetBitContext *gb, int component) |
| { |
| int code, diff; |
| |
| if (component == 0) { |
| code = get_vlc2(gb, ff_dc_lum_vlc, DC_VLC_BITS, 2); |
| } else { |
| code = get_vlc2(gb, ff_dc_chroma_vlc, 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, |
| const uint8_t *scantable, int last_dc[3], |
| int16_t *block, int index, int qscale); |
| |
| #endif /* AVCODEC_MPEG12DEC_H */ |
