LCOV - code coverage report
Current view: top level - libavcodec - takdsp.c (source / functions) Hit Total Coverage
Test: coverage.info Lines: 28 34 82.4 %
Date: 2017-12-18 06:23:41 Functions: 4 5 80.0 %

          Line data    Source code
       1             : /*
       2             :  * TAK decoder
       3             :  * Copyright (c) 2015 Paul B Mahol
       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 "libavutil/attributes.h"
      23             : #include "takdsp.h"
      24             : #include "config.h"
      25             : 
      26           1 : static void decorrelate_ls(int32_t *p1, int32_t *p2, int length)
      27             : {
      28             :     int i;
      29             : 
      30       11026 :     for (i = 0; i < length; i++) {
      31       11025 :         int32_t a = p1[i];
      32       11025 :         int32_t b = p2[i];
      33       11025 :         p2[i]     = a + b;
      34             :     }
      35           1 : }
      36             : 
      37           0 : static void decorrelate_sr(int32_t *p1, int32_t *p2, int length)
      38             : {
      39             :     int i;
      40             : 
      41           0 :     for (i = 0; i < length; i++) {
      42           0 :         int32_t a = p1[i];
      43           0 :         int32_t b = p2[i];
      44           0 :         p1[i]     = b - a;
      45             :     }
      46           0 : }
      47             : 
      48           2 : static void decorrelate_sm(int32_t *p1, int32_t *p2, int length)
      49             : {
      50             :     int i;
      51             : 
      52       22052 :     for (i = 0; i < length; i++) {
      53       22050 :         int32_t a = p1[i];
      54       22050 :         int32_t b = p2[i];
      55       22050 :         a        -= b >> 1;
      56       22050 :         p1[i]     = a;
      57       22050 :         p2[i]     = a + b;
      58             :     }
      59           2 : }
      60             : 
      61           5 : static void decorrelate_sf(int32_t *p1, int32_t *p2, int length, int dshift, int dfactor)
      62             : {
      63             :     int i;
      64             : 
      65       55130 :     for (i = 0; i < length; i++) {
      66       55125 :         int32_t a = p1[i];
      67       55125 :         int32_t b = p2[i];
      68       55125 :         b         = dfactor * (b >> dshift) + 128 >> 8 << dshift;
      69       55125 :         p1[i]     = b - a;
      70             :     }
      71           5 : }
      72             : 
      73           2 : av_cold void ff_takdsp_init(TAKDSPContext *c)
      74             : {
      75           2 :     c->decorrelate_ls = decorrelate_ls;
      76           2 :     c->decorrelate_sr = decorrelate_sr;
      77           2 :     c->decorrelate_sm = decorrelate_sm;
      78           2 :     c->decorrelate_sf = decorrelate_sf;
      79             : 
      80             :     if (ARCH_X86)
      81           2 :         ff_takdsp_init_x86(c);
      82           2 : }

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