LCOV - code coverage report
Current view: top level - libavcodec - mss2dsp.c (source / functions) Hit Total Coverage
Test: coverage.info Lines: 53 61 86.9 %
Date: 2017-12-17 16:07:53 Functions: 4 6 66.7 %

          Line data    Source code
       1             : /*
       2             :  * Microsoft Screen 2 (aka Windows Media Video V9 Screen) decoder
       3             :  *
       4             :  * This file is part of FFmpeg.
       5             :  *
       6             :  * FFmpeg is free software; you can redistribute it and/or
       7             :  * modify it under the terms of the GNU Lesser General Public
       8             :  * License as published by the Free Software Foundation; either
       9             :  * version 2.1 of the License, or (at your option) any later version.
      10             :  *
      11             :  * FFmpeg is distributed in the hope that it will be useful,
      12             :  * but WITHOUT ANY WARRANTY; without even the implied warranty of
      13             :  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
      14             :  * Lesser General Public License for more details.
      15             :  *
      16             :  * You should have received a copy of the GNU Lesser General Public
      17             :  * License along with FFmpeg; if not, write to the Free Software
      18             :  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
      19             :  */
      20             : 
      21             : /**
      22             :  * @file
      23             :  * Microsoft Screen 2 (aka Windows Media Video V9 Screen) decoder DSP routines
      24             :  */
      25             : 
      26             : #include "mss2dsp.h"
      27             : #include "libavutil/common.h"
      28             : 
      29          79 : static av_always_inline void mss2_blit_wmv9_template(uint8_t *dst,
      30             :                                                      ptrdiff_t dst_stride,
      31             :                                                      int gray,
      32             :                                                      int use_mask,
      33             :                                                      int maskcolor,
      34             :                                                      const uint8_t *mask,
      35             :                                                      ptrdiff_t mask_stride,
      36             :                                                      const uint8_t *srcy,
      37             :                                                      ptrdiff_t srcy_stride,
      38             :                                                      const uint8_t *srcu,
      39             :                                                      const uint8_t *srcv,
      40             :                                                      ptrdiff_t srcuv_stride,
      41             :                                                      int w, int h)
      42             : {
      43          79 :     int i, j, k, r = -1;
      44       19118 :     while (++r < h) {
      45     6081840 :         for (i = 0, j = 0, k = 0; i < w; j += (i & 1), i++, k += 3) {
      46     6062880 :             if (!use_mask || mask[i] == maskcolor) {
      47     5965570 :                 if (gray) {
      48           0 :                     dst[k] = dst[k + 1] = dst[k + 2] = 0x80;
      49             :                 } else {
      50     5965570 :                     int y = srcy[i];
      51     5965570 :                     int u = srcu[j] - 128;
      52     5965570 :                     int v = srcv[j] - 128;
      53     5965570 :                     dst[k]     = av_clip_uint8(y + (             91881 * v + 32768 >> 16));
      54     5965570 :                     dst[k + 1] = av_clip_uint8(y + (-22554 * u - 46802 * v + 32768 >> 16));
      55     5965570 :                     dst[k + 2] = av_clip_uint8(y + (116130 * u             + 32768 >> 16));
      56             :                 }
      57             :             }
      58             :         }
      59       18960 :         mask +=  mask_stride;
      60       18960 :         dst  +=   dst_stride;
      61       18960 :         srcy +=  srcy_stride;
      62       18960 :         srcu += srcuv_stride * (r & 1);
      63       18960 :         srcv += srcuv_stride * (r & 1);
      64             :     }
      65          79 : }
      66             : 
      67           0 : static void mss2_blit_wmv9_c(uint8_t *dst, ptrdiff_t dst_stride,
      68             :                              const uint8_t *srcy, ptrdiff_t srcy_stride,
      69             :                              const uint8_t *srcu, const uint8_t *srcv,
      70             :                              ptrdiff_t srcuv_stride, int w, int h)
      71             : {
      72           0 :     mss2_blit_wmv9_template(dst, dst_stride, 0, 0,
      73             :                             0, NULL, 0,
      74             :                             srcy, srcy_stride,
      75             :                             srcu, srcv, srcuv_stride,
      76             :                             w, h);
      77           0 : }
      78             : 
      79          79 : static void mss2_blit_wmv9_masked_c(uint8_t *dst, ptrdiff_t dst_stride,
      80             :                                     int maskcolor, const uint8_t *mask,
      81             :                                     ptrdiff_t mask_stride,
      82             :                                     const uint8_t *srcy, ptrdiff_t srcy_stride,
      83             :                                     const uint8_t *srcu, const uint8_t *srcv,
      84             :                                     ptrdiff_t srcuv_stride, int w, int h)
      85             : {
      86          79 :     mss2_blit_wmv9_template(dst, dst_stride, 0, 1,
      87             :                             maskcolor, mask, mask_stride,
      88             :                             srcy, srcy_stride,
      89             :                             srcu, srcv, srcuv_stride,
      90             :                             w, h);
      91          79 : }
      92             : 
      93           0 : static void mss2_gray_fill_masked_c(uint8_t *dst, ptrdiff_t dst_stride,
      94             :                                     int maskcolor, const uint8_t *mask,
      95             :                                     ptrdiff_t mask_stride, int w, int h)
      96             : {
      97           0 :     mss2_blit_wmv9_template(dst, dst_stride, 1, 1,
      98             :                             maskcolor, mask, mask_stride,
      99             :                             NULL, 0,
     100             :                             NULL, NULL, 0,
     101             :                             w, h);
     102           0 : }
     103             : 
     104         159 : static void upsample_plane_c(uint8_t *plane, ptrdiff_t plane_stride, int w, int h)
     105             : {
     106             :     uint8_t *src1, *src2, *dst1, *dst2, *p, a, b;
     107             :     int i, j;
     108             : 
     109         159 :     if(!w || !h)
     110           0 :         return;
     111             : 
     112         159 :     w += (w & 1);
     113         159 :     h += (h & 1);
     114             : 
     115         159 :     j = h - 1;
     116             : 
     117         318 :     memcpy(plane + plane_stride *  j,
     118         159 :            plane + plane_stride * (j >> 1),
     119             :            w);
     120             : 
     121       12879 :     while ((j -= 2) > 0) {
     122       12561 :         dst1 = plane + plane_stride *  (j + 1);
     123       12561 :         dst2 = plane + plane_stride *   j;
     124       12561 :         src1 = plane + plane_stride * ((j + 1) >> 1);
     125       12561 :         src2 = plane + plane_stride * ( j      >> 1);
     126             : 
     127     1520695 :         for (i = (w - 1) >> 1; i >= 0; i--) {
     128     1508134 :             a = src1[i];
     129     1508134 :             b = src2[i];
     130     1508134 :             dst1[i] = (3 * a + b + 2) >> 2;
     131     1508134 :             dst2[i] = (a + 3 * b + 2) >> 2;
     132             :         }
     133             :     }
     134             : 
     135       25599 :     for (j = h - 1; j >= 0; j--) {
     136       25440 :         p = plane + plane_stride * j;
     137       25440 :         i = w - 1;
     138             : 
     139       25440 :         p[i] = p[i >> 1];
     140             : 
     141     3075600 :         while ((i -= 2) > 0) {
     142     3024720 :             a = p[ i      >> 1];
     143     3024720 :             b = p[(i + 1) >> 1];
     144     3024720 :             p[i]     = (3 * a + b + 1) >> 2;
     145     3024720 :             p[i + 1] = (a + 3 * b + 1) >> 2;
     146             :         }
     147             :     }
     148             : }
     149             : 
     150          10 : av_cold void ff_mss2dsp_init(MSS2DSPContext* dsp)
     151             : {
     152          10 :     dsp->mss2_blit_wmv9        = mss2_blit_wmv9_c;
     153          10 :     dsp->mss2_blit_wmv9_masked = mss2_blit_wmv9_masked_c;
     154          10 :     dsp->mss2_gray_fill_masked = mss2_gray_fill_masked_c;
     155          10 :     dsp->upsample_plane        = upsample_plane_c;
     156          10 : }

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