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36b5f71b1f
For all VLCs here, the number of bits of the VLC is write-only, because it is hardcoded at the call site. Therefore one can replace these VLC structures with the only thing that is actually used: The pointer to the VLCElem table. And in some cases one can even avoid this. Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
42 lines
1.5 KiB
C
42 lines
1.5 KiB
C
/*
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* MSMPEG4 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_MSMPEG4DEC_H
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#define AVCODEC_MSMPEG4DEC_H
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#include "avcodec.h"
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#include "mpegvideo.h"
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#define INTER_INTRA_VLC_BITS 3
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#define MB_NON_INTRA_VLC_BITS 9
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extern const VLCElem *ff_mb_non_intra_vlc[4];
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extern VLCElem ff_inter_intra_vlc[8];
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int ff_msmpeg4_decode_init(AVCodecContext *avctx);
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int ff_msmpeg4_decode_picture_header(MpegEncContext *s);
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int ff_msmpeg4_decode_ext_header(MpegEncContext *s, int buf_size);
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void ff_msmpeg4_decode_motion(MpegEncContext * s, int *mx_ptr, int *my_ptr);
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int ff_msmpeg4_decode_block(MpegEncContext * s, int16_t * block,
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int n, int coded, const uint8_t *scan_table);
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#endif
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