LCOV - code coverage report
Current view: top level - libavcodec - huffyuvencdsp.c (source / functions) Hit Total Coverage
Test: coverage.info Lines: 15 26 57.7 %
Date: 2017-12-18 06:23:41 Functions: 2 3 66.7 %

          Line data    Source code
       1             : /*
       2             :  * This file is part of FFmpeg.
       3             :  *
       4             :  * FFmpeg is free software; you can redistribute it and/or
       5             :  * modify it under the terms of the GNU Lesser General Public
       6             :  * License as published by the Free Software Foundation; either
       7             :  * version 2.1 of the License, or (at your option) any later version.
       8             :  *
       9             :  * FFmpeg is distributed in the hope that it will be useful,
      10             :  * but WITHOUT ANY WARRANTY; without even the implied warranty of
      11             :  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
      12             :  * Lesser General Public License for more details.
      13             :  *
      14             :  * You should have received a copy of the GNU Lesser General Public
      15             :  * License along with FFmpeg; if not, write to the Free Software
      16             :  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
      17             :  */
      18             : 
      19             : #include "config.h"
      20             : #include "libavutil/attributes.h"
      21             : #include "huffyuvencdsp.h"
      22             : #include "mathops.h"
      23             : 
      24             : // 0x00010001 or 0x0001000100010001 or whatever, depending on the cpu's native arithmetic size
      25             : #define pw_1 (ULONG_MAX / UINT16_MAX)
      26             : 
      27      488200 : static void diff_int16_c(uint16_t *dst, const uint16_t *src1, const uint16_t *src2, unsigned mask, int w){
      28             :     long i;
      29             : #if !HAVE_FAST_UNALIGNED
      30             :     if((long)src2 & (sizeof(long)-1)){
      31             :         for(i=0; i+3<w; i+=4){
      32             :             dst[i+0] = (src1[i+0]-src2[i+0]) & mask;
      33             :             dst[i+1] = (src1[i+1]-src2[i+1]) & mask;
      34             :             dst[i+2] = (src1[i+2]-src2[i+2]) & mask;
      35             :             dst[i+3] = (src1[i+3]-src2[i+3]) & mask;
      36             :         }
      37             :     }else
      38             : #endif
      39             :     {
      40      488200 :         unsigned long pw_lsb = (mask >> 1) * pw_1;
      41      488200 :         unsigned long pw_msb = pw_lsb +  pw_1;
      42             : 
      43    33838600 :         for (i = 0; i <= w - (int)sizeof(long)/2; i += sizeof(long)/2) {
      44    33350400 :             long a = *(long*)(src1+i);
      45    33350400 :             long b = *(long*)(src2+i);
      46    33350400 :             *(long*)(dst+i) = ((a|pw_msb) - (b&pw_lsb)) ^ ((a^b^pw_msb)&pw_msb);
      47             :         }
      48             :     }
      49      515100 :     for (; i<w; i++)
      50       26900 :         dst[i] = (src1[i] - src2[i]) & mask;
      51      488200 : }
      52             : 
      53           0 : static void sub_hfyu_median_pred_int16_c(uint16_t *dst, const uint16_t *src1, const uint16_t *src2, unsigned mask, int w, int *left, int *left_top){
      54             :     int i;
      55             :     uint16_t l, lt;
      56             : 
      57           0 :     l  = *left;
      58           0 :     lt = *left_top;
      59             : 
      60           0 :     for(i=0; i<w; i++){
      61           0 :         const int pred = mid_pred(l, src1[i], (l + src1[i] - lt) & mask);
      62           0 :         lt = src1[i];
      63           0 :         l  = src2[i];
      64           0 :         dst[i] = (l - pred) & mask;
      65             :     }
      66             : 
      67           0 :     *left     = l;
      68           0 :     *left_top = lt;
      69           0 : }
      70             : 
      71          32 : av_cold void ff_huffyuvencdsp_init(HuffYUVEncDSPContext *c, AVCodecContext *avctx)
      72             : {
      73          32 :     c->diff_int16           = diff_int16_c;
      74          32 :     c->sub_hfyu_median_pred_int16 = sub_hfyu_median_pred_int16_c;
      75             : 
      76             :     if (ARCH_X86)
      77          32 :         ff_huffyuvencdsp_init_x86(c, avctx);
      78          32 : }

Generated by: LCOV version 1.13