LCOV - code coverage report
Current view: top level - libavcodec - mpegvideodsp.c (source / functions) Hit Total Coverage
Test: coverage.info Lines: 5 64 7.8 %
Date: 2017-12-15 11:05:35 Functions: 1 3 33.3 %

          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 "libavutil/common.h"
      22             : #include "mpegvideodsp.h"
      23             : 
      24           0 : static void gmc1_c(uint8_t *dst, uint8_t *src, int stride, int h,
      25             :                    int x16, int y16, int rounder)
      26             : {
      27           0 :     const int A = (16 - x16) * (16 - y16);
      28           0 :     const int B = (x16)      * (16 - y16);
      29           0 :     const int C = (16 - x16) * (y16);
      30           0 :     const int D = (x16)      * (y16);
      31             :     int i;
      32             : 
      33           0 :     for (i = 0; i < h; i++) {
      34           0 :         dst[0] = (A * src[0] + B * src[1] + C * src[stride + 0] + D * src[stride + 1] + rounder) >> 8;
      35           0 :         dst[1] = (A * src[1] + B * src[2] + C * src[stride + 1] + D * src[stride + 2] + rounder) >> 8;
      36           0 :         dst[2] = (A * src[2] + B * src[3] + C * src[stride + 2] + D * src[stride + 3] + rounder) >> 8;
      37           0 :         dst[3] = (A * src[3] + B * src[4] + C * src[stride + 3] + D * src[stride + 4] + rounder) >> 8;
      38           0 :         dst[4] = (A * src[4] + B * src[5] + C * src[stride + 4] + D * src[stride + 5] + rounder) >> 8;
      39           0 :         dst[5] = (A * src[5] + B * src[6] + C * src[stride + 5] + D * src[stride + 6] + rounder) >> 8;
      40           0 :         dst[6] = (A * src[6] + B * src[7] + C * src[stride + 6] + D * src[stride + 7] + rounder) >> 8;
      41           0 :         dst[7] = (A * src[7] + B * src[8] + C * src[stride + 7] + D * src[stride + 8] + rounder) >> 8;
      42           0 :         dst   += stride;
      43           0 :         src   += stride;
      44             :     }
      45           0 : }
      46             : 
      47           0 : void ff_gmc_c(uint8_t *dst, uint8_t *src, int stride, int h, int ox, int oy,
      48             :               int dxx, int dxy, int dyx, int dyy, int shift, int r,
      49             :               int width, int height)
      50             : {
      51             :     int y, vx, vy;
      52           0 :     const int s = 1 << shift;
      53             : 
      54           0 :     width--;
      55           0 :     height--;
      56             : 
      57           0 :     for (y = 0; y < h; y++) {
      58             :         int x;
      59             : 
      60           0 :         vx = ox;
      61           0 :         vy = oy;
      62           0 :         for (x = 0; x < 8; x++) { // FIXME: optimize
      63             :             int index;
      64           0 :             int src_x  = vx >> 16;
      65           0 :             int src_y  = vy >> 16;
      66           0 :             int frac_x = src_x & (s - 1);
      67           0 :             int frac_y = src_y & (s - 1);
      68             : 
      69           0 :             src_x >>= shift;
      70           0 :             src_y >>= shift;
      71             : 
      72           0 :             if ((unsigned) src_x < width) {
      73           0 :                 if ((unsigned) src_y < height) {
      74           0 :                     index = src_x + src_y * stride;
      75           0 :                     dst[y * stride + x] =
      76           0 :                         ((src[index]                        * (s - frac_x) +
      77           0 :                           src[index + 1]          * frac_x) * (s - frac_y) +
      78           0 :                          (src[index + stride]               * (s - frac_x) +
      79           0 :                           src[index + stride + 1] * frac_x) *      frac_y  +
      80           0 :                          r) >> (shift * 2);
      81             :                 } else {
      82           0 :                     index = src_x + av_clip(src_y, 0, height) * stride;
      83           0 :                     dst[y * stride + x] =
      84           0 :                         ((src[index]               * (s - frac_x) +
      85           0 :                           src[index + 1] * frac_x) *  s           +
      86           0 :                          r) >> (shift * 2);
      87             :                 }
      88             :             } else {
      89           0 :                 if ((unsigned) src_y < height) {
      90           0 :                     index = av_clip(src_x, 0, width) + src_y * stride;
      91           0 :                     dst[y * stride + x] =
      92           0 :                         ((src[index]                    * (s - frac_y) +
      93           0 :                           src[index + stride] * frac_y) *  s           +
      94           0 :                          r) >> (shift * 2);
      95             :                 } else {
      96           0 :                     index = av_clip(src_x, 0, width) +
      97           0 :                             av_clip(src_y, 0, height) * stride;
      98           0 :                     dst[y * stride + x] = src[index];
      99             :                 }
     100             :             }
     101             : 
     102           0 :             vx += dxx;
     103           0 :             vy += dyx;
     104             :         }
     105           0 :         ox += dxy;
     106           0 :         oy += dyy;
     107             :     }
     108           0 : }
     109             : 
     110         737 : av_cold void ff_mpegvideodsp_init(MpegVideoDSPContext *c)
     111             : {
     112         737 :     c->gmc1 = gmc1_c;
     113         737 :     c->gmc  = ff_gmc_c;
     114             : 
     115             :     if (ARCH_PPC)
     116             :         ff_mpegvideodsp_init_ppc(c);
     117             :     if (ARCH_X86)
     118         737 :         ff_mpegvideodsp_init_x86(c);
     119         737 : }

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