LCOV - code coverage report
Current view: top level - libavcodec - vp56dsp.c (source / functions) Hit Total Coverage
Test: coverage.info Lines: 37 37 100.0 %
Date: 2017-12-16 21:16:39 Functions: 8 8 100.0 %

          Line data    Source code
       1             : /*
       2             :  * Copyright (c) 2006 Aurelien Jacobs <aurel@gnuage.org>
       3             :  * Copyright (c) 2010 Mans Rullgard <mans@mansr.com>
       4             :  *
       5             :  * This file is part of FFmpeg.
       6             :  *
       7             :  * FFmpeg is free software; you can redistribute it and/or
       8             :  * modify it under the terms of the GNU Lesser General Public
       9             :  * License as published by the Free Software Foundation; either
      10             :  * version 2.1 of the License, or (at your option) any later version.
      11             :  *
      12             :  * FFmpeg is distributed in the hope that it will be useful,
      13             :  * but WITHOUT ANY WARRANTY; without even the implied warranty of
      14             :  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
      15             :  * Lesser General Public License for more details.
      16             :  *
      17             :  * You should have received a copy of the GNU Lesser General Public
      18             :  * License along with FFmpeg; if not, write to the Free Software
      19             :  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
      20             :  */
      21             : 
      22             : #include <stdint.h>
      23             : 
      24             : #include "libavutil/attributes.h"
      25             : #include "avcodec.h"
      26             : #include "vp56dsp.h"
      27             : #include "libavutil/common.h"
      28             : 
      29             : #define VP56_EDGE_FILTER(pfx, suf, pix_inc, line_inc)                   \
      30             : static void pfx ## _edge_filter_ ## suf(uint8_t *yuv, ptrdiff_t stride, \
      31             :                                         int t)                          \
      32             : {                                                                       \
      33             :     int pix2_inc = 2 * pix_inc;                                         \
      34             :     int i, v;                                                           \
      35             :                                                                         \
      36             :     for (i=0; i<12; i++) {                                              \
      37             :         v = (yuv[-pix2_inc] + 3*(yuv[0]-yuv[-pix_inc]) - yuv[pix_inc] + 4)>>3;\
      38             :         v = pfx##_adjust(v, t);                                         \
      39             :         yuv[-pix_inc] = av_clip_uint8(yuv[-pix_inc] + v);               \
      40             :         yuv[0] = av_clip_uint8(yuv[0] - v);                             \
      41             :         yuv += line_inc;                                                \
      42             :     }                                                                   \
      43             : }
      44             : 
      45             : #if CONFIG_VP5_DECODER
      46             : /* Gives very similar result than the vp6 version except in a few cases */
      47     1318212 : static int vp5_adjust(int v, int t)
      48             : {
      49     1318212 :     int s2, s1 = v >> 31;
      50     1318212 :     v ^= s1;
      51     1318212 :     v -= s1;
      52     1318212 :     v *= v < 2*t;
      53     1318212 :     v -= t;
      54     1318212 :     s2 = v >> 31;
      55     1318212 :     v ^= s2;
      56     1318212 :     v -= s2;
      57     1318212 :     v = t - v;
      58     1318212 :     v += s1;
      59     1318212 :     v ^= s1;
      60     1318212 :     return v;
      61             : }
      62             : 
      63             : 
      64       84135 : VP56_EDGE_FILTER(vp5, hor, 1, stride)
      65       25716 : VP56_EDGE_FILTER(vp5, ver, stride, 1)
      66             : 
      67           2 : av_cold void ff_vp5dsp_init(VP56DSPContext *s)
      68             : {
      69           2 :     s->edge_filter_hor = vp5_edge_filter_hor;
      70           2 :     s->edge_filter_ver = vp5_edge_filter_ver;
      71           2 : }
      72             : #endif /* CONFIG_VP5_DECODER */
      73             : 
      74             : #if CONFIG_VP6_DECODER
      75     1550880 : static int vp6_adjust(int v, int t)
      76             : {
      77     1550880 :     int V = v, s = v >> 31;
      78     1550880 :     V ^= s;
      79     1550880 :     V -= s;
      80     1550880 :     if (V-t-1 >= (unsigned)(t-1))
      81     1504894 :         return v;
      82       45986 :     V = 2*t - V;
      83       45986 :     V += s;
      84       45986 :     V ^= s;
      85       45986 :     return V;
      86             : }
      87             : 
      88       66088 : VP56_EDGE_FILTER(vp6, hor, 1, stride)
      89       63152 : VP56_EDGE_FILTER(vp6, ver, stride, 1)
      90             : 
      91          17 : av_cold void ff_vp6dsp_init(VP56DSPContext *s)
      92             : {
      93          17 :     s->edge_filter_hor = vp6_edge_filter_hor;
      94          17 :     s->edge_filter_ver = vp6_edge_filter_ver;
      95             : 
      96          17 :     s->vp6_filter_diag4 = ff_vp6_filter_diag4_c;
      97             : 
      98             :     if (ARCH_ARM)
      99             :         ff_vp6dsp_init_arm(s);
     100             :     if (ARCH_X86)
     101          17 :         ff_vp6dsp_init_x86(s);
     102          17 : }
     103             : #endif /* CONFIG_VP6_DECODER */

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