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4349 | Serge | 1 | /* |
2 | * copyright (c) 2004 Michael Niedermayer |
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3 | * |
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4 | * This file is part of FFmpeg. |
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5 | * |
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6 | * FFmpeg is free software; you can redistribute it and/or |
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7 | * modify it under the terms of the GNU Lesser General Public |
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8 | * License as published by the Free Software Foundation; either |
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9 | * version 2.1 of the License, or (at your option) any later version. |
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10 | * |
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11 | * FFmpeg is distributed in the hope that it will be useful, |
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12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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14 | * Lesser General Public License for more details. |
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15 | * |
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16 | * You should have received a copy of the GNU Lesser General Public |
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17 | * License along with FFmpeg; if not, write to the Free Software |
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18 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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19 | */ |
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20 | |||
21 | #ifndef AVCODEC_UNARY_H |
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22 | #define AVCODEC_UNARY_H |
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23 | |||
24 | #include "get_bits.h" |
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25 | |||
26 | /** |
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27 | * Get unary code of limited length |
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28 | * @param gb GetBitContext |
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29 | * @param[in] stop The bitstop value (unary code of 1's or 0's) |
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30 | * @param[in] len Maximum length |
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31 | * @return Unary length/index |
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32 | */ |
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33 | static inline int get_unary(GetBitContext *gb, int stop, int len) |
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34 | { |
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35 | int i; |
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36 | |||
37 | for(i = 0; i < len && get_bits1(gb) != stop; i++); |
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38 | return i; |
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39 | } |
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40 | |||
41 | /** |
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42 | * Get unary code terminated by a 0 with a maximum length of 33 |
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43 | * @param gb GetBitContext |
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44 | * @return Unary length/index |
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45 | */ |
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46 | static inline int get_unary_0_33(GetBitContext *gb) |
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47 | { |
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48 | return get_unary(gb, 0, 33); |
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49 | } |
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50 | |||
51 | static inline int get_unary_0_9(GetBitContext *gb) |
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52 | { |
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53 | return get_unary(gb, 0, 9); |
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54 | } |
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55 | |||
56 | #endif /* AVCODEC_UNARY_H */> |