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d08b2900a9
The encoder uses ff_svq1_inter_mean_vlc + 256 and setting hidden visibility allows to bake this "+ 256" into the general offset of ff_svq1_inter_mean_vlc and the code accessing it. For certain arches, this is also required for the compiler to not produce overtly pessimistic code that can't be fixed up by the linker lateron. Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
68 lines
2.1 KiB
C
68 lines
2.1 KiB
C
/*
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* SVQ1 decoder
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* ported to MPlayer by Arpi <arpi@thot.banki.hu>
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* ported to libavcodec by Nick Kurshev <nickols_k@mail.ru>
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*
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* Copyright (c) 2002 The Xine project
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* Copyright (c) 2002 The FFmpeg project
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*
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* SVQ1 Encoder (c) 2004 Mike Melanson <melanson@pcisys.net>
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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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/**
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* @file
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* Sorenson Vector Quantizer #1 (SVQ1) video codec.
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* For more information of the SVQ1 algorithm, visit:
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* http://www.pcisys.net/~melanson/codecs/
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*/
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#ifndef AVCODEC_SVQ1_H
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#define AVCODEC_SVQ1_H
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#include <stdint.h>
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#include "libavutil/attributes_internal.h"
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#define SVQ1_BLOCK_SKIP 0
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#define SVQ1_BLOCK_INTER 1
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#define SVQ1_BLOCK_INTER_4V 2
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#define SVQ1_BLOCK_INTRA 3
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#define SVQ1_BLOCK_SKIP_CODE 1
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#define SVQ1_BLOCK_SKIP_LEN 1
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#define SVQ1_BLOCK_INTER_CODE 1
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#define SVQ1_BLOCK_INTER_LEN 2
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#define SVQ1_BLOCK_INTRA_CODE 0
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#define SVQ1_BLOCK_INTRA_LEN 3
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FF_VISIBILITY_PUSH_HIDDEN
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extern const int8_t *const ff_svq1_inter_codebooks[6];
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extern const int8_t *const ff_svq1_intra_codebooks[6];
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extern const uint8_t ff_svq1_block_type_vlc[4][2];
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extern const uint8_t ff_svq1_intra_multistage_vlc[6][8][2];
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extern const uint8_t ff_svq1_inter_multistage_vlc[6][8][2];
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extern const uint16_t ff_svq1_intra_mean_vlc[256][2];
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extern const uint16_t ff_svq1_inter_mean_vlc[512][2];
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extern const uint16_t ff_svq1_frame_size_table[7][2];
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FF_VISIBILITY_POP_HIDDEN
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#endif /* AVCODEC_SVQ1_H */
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