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53 lines
1.8 KiB
53 lines
1.8 KiB
/* |
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* FFV1 codec |
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* |
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* Copyright (c) 2003-2013 Michael Niedermayer <michaelni@gmx.at> |
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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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static inline int RENAME(predict)(TYPE *src, TYPE *last) |
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{ |
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const int LT = last[-1]; |
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const int T = last[0]; |
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const int L = src[-1]; |
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return mid_pred(L, L + T - LT, T); |
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} |
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static inline int RENAME(get_context)(PlaneContext *p, TYPE *src, |
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TYPE *last, TYPE *last2) |
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{ |
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const int LT = last[-1]; |
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const int T = last[0]; |
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const int RT = last[1]; |
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const int L = src[-1]; |
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if (p->quant_table[3][127]) { |
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const int TT = last2[0]; |
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const int LL = src[-2]; |
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return p->quant_table[0][(L - LT) & 0xFF] + |
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p->quant_table[1][(LT - T) & 0xFF] + |
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p->quant_table[2][(T - RT) & 0xFF] + |
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p->quant_table[3][(LL - L) & 0xFF] + |
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p->quant_table[4][(TT - T) & 0xFF]; |
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} else |
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return p->quant_table[0][(L - LT) & 0xFF] + |
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p->quant_table[1][(LT - T) & 0xFF] + |
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p->quant_table[2][(T - RT) & 0xFF]; |
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} |
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