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50 lines
1.6 KiB
50 lines
1.6 KiB
/* |
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* MPEG-1/2 decoder header |
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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_MPEG12DEC_H |
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#define AVCODEC_MPEG12DEC_H |
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#include "get_bits.h" |
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#include "mpeg12vlc.h" |
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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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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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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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const uint8_t *scantable, int last_dc[3], |
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int16_t *block, int index, int qscale); |
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#endif /* AVCODEC_MPEG12DEC_H */
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