FFmpeg
ffv1_template.c
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1 /*
2  * FFV1 codec
3  *
4  * Copyright (c) 2003-2013 Michael Niedermayer <michaelni@gmx.at>
5  *
6  * This file is part of FFmpeg.
7  *
8  * FFmpeg is free software; you can redistribute it and/or
9  * modify it under the terms of the GNU Lesser General Public
10  * License as published by the Free Software Foundation; either
11  * version 2.1 of the License, or (at your option) any later version.
12  *
13  * FFmpeg is distributed in the hope that it will be useful,
14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16  * Lesser General Public License for more details.
17  *
18  * You should have received a copy of the GNU Lesser General Public
19  * License along with FFmpeg; if not, write to the Free Software
20  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
21  */
22 
23 static inline int RENAME(predict)(TYPE *src, TYPE *last)
24 {
25  const int LT = last[-1];
26  const int T = last[0];
27  const int L = src[-1];
28 
29  return mid_pred(L, L + T - LT, T);
30 }
31 
32 static inline int RENAME(get_context)(PlaneContext *p, TYPE *src,
33  TYPE *last, TYPE *last2)
34 {
35  const int LT = last[-1];
36  const int T = last[0];
37  const int RT = last[1];
38  const int L = src[-1];
39 
40  if (p->quant_table[3][127]) {
41  const int TT = last2[0];
42  const int LL = src[-2];
43  return p->quant_table[0][(L - LT) & 0xFF] +
44  p->quant_table[1][(LT - T) & 0xFF] +
45  p->quant_table[2][(T - RT) & 0xFF] +
46  p->quant_table[3][(LL - L) & 0xFF] +
47  p->quant_table[4][(TT - T) & 0xFF];
48  } else
49  return p->quant_table[0][(L - LT) & 0xFF] +
50  p->quant_table[1][(LT - T) & 0xFF] +
51  p->quant_table[2][(T - RT) & 0xFF];
52 }
53 
#define RENAME(name)
Definition: ffv1.h:197
static av_always_inline void predict(PredictorState *ps, float *coef, int output_enable)
Definition: aacdec.c:174
#define src
Definition: vp8dsp.c:254
#define T(x)
Definition: vp56_arith.h:29
#define L(x)
Definition: vp56_arith.h:36
#define TYPE
Definition: ffv1.h:196
#define mid_pred
Definition: mathops.h:97