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74 lines
2.9 KiB
74 lines
2.9 KiB
/* |
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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_VLC_H |
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#define AVCODEC_VLC_H |
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#include <stdint.h> |
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#define VLC_TYPE int16_t |
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typedef struct VLC { |
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int bits; |
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VLC_TYPE (*table)[2]; ///< code, bits |
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int table_size, table_allocated; |
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} VLC; |
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typedef struct RL_VLC_ELEM { |
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int16_t level; |
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int8_t len; |
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uint8_t run; |
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} RL_VLC_ELEM; |
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#define init_vlc(vlc, nb_bits, nb_codes, \ |
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bits, bits_wrap, bits_size, \ |
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codes, codes_wrap, codes_size, \ |
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flags) \ |
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ff_init_vlc_sparse(vlc, nb_bits, nb_codes, \ |
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bits, bits_wrap, bits_size, \ |
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codes, codes_wrap, codes_size, \ |
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NULL, 0, 0, flags) |
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int ff_init_vlc_sparse(VLC *vlc, int nb_bits, int nb_codes, |
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const void *bits, int bits_wrap, int bits_size, |
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const void *codes, int codes_wrap, int codes_size, |
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const void *symbols, int symbols_wrap, int symbols_size, |
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int flags); |
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void ff_free_vlc(VLC *vlc); |
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#define INIT_VLC_LE 2 |
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#define INIT_VLC_USE_NEW_STATIC 4 |
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#define INIT_VLC_STATIC(vlc, bits, a, b, c, d, e, f, g, static_size) \ |
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do { \ |
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static VLC_TYPE table[static_size][2]; \ |
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(vlc)->table = table; \ |
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(vlc)->table_allocated = static_size; \ |
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init_vlc(vlc, bits, a, b, c, d, e, f, g, INIT_VLC_USE_NEW_STATIC); \ |
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} while (0) |
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#define INIT_LE_VLC_STATIC(vlc, bits, a, b, c, d, e, f, g, static_size) \ |
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do { \ |
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static VLC_TYPE table[static_size][2]; \ |
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(vlc)->table = table; \ |
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(vlc)->table_allocated = static_size; \ |
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init_vlc(vlc, bits, a, b, c, d, e, f, g, \ |
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INIT_VLC_USE_NEW_STATIC | INIT_VLC_LE); \ |
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} while (0) |
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#endif /* AVCODEC_VLC_H */
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