server/supernova/audio_backend/cpu_time_info.hpp

   1 //  cpu time info
   2 //  Copyright (C) 2011 Tim Blechmann
   3 //
   4 //  This program is free software; you can redistribute it and/or modify
   5 //  it under the terms of the GNU General Public License as published by
   6 //  the Free Software Foundation; either version 2 of the License, or
   7 //  (at your option) any later version.
   8 //
   9 //  This program 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
  12 //  GNU General Public License for more details.
  13 //
  14 //  You should have received a copy of the GNU General Public License
  15 //  along with this program; see the file COPYING.  If not, write to
  16 //  the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  17 //  Boston, MA 02111-1307, USA.
  18
  19 #ifndef AUDIO_BACKEND_CPU_TIME_INFO_HPP
  20 #define AUDIO_BACKEND_CPU_TIME_INFO_HPP
  21
  22 #include <vector>
  23 #include "utilities/aligned_class.hpp"
  24 #include "nova-simd/simd_horizontal_functions.hpp"
  25
  26 namespace nova {
  27
  28 struct cpu_time_info
  29 {
  30     static const size_t size = 512; // 700 ms at 128 samples 96kHz, 6.9 s at 512 samples 44.1kHz
  31
  32     cpu_time_info(void):
  33         index(size - 1), buffer(size, 0.f)
  34     {}
  35
  36     void update(float f)
  37     {
  38         ++index;
  39         if (index == size)
  40             index = 0;
  41
  42         buffer[index] = f;
  43     }
  44
  45     void get(float & peak, float & average) const
  46     {
  47         const float average_factor = 1.f/size;
  48         float sum;
  49 #ifdef __PATHCC__
  50         horizontal_maxsum_vec_simd(peak, sum, &buffer.front(), size);
  51 #else
  52         horizontal_maxsum_vec_simd(peak, sum, buffer.data(), size);
  53 #endif
  54         average = sum * average_factor;
  55     }
  56
  57     std::size_t index;
  58     std::vector<float, aligned_allocator<float> > buffer;
  59 };
  60
  61 }
  62
  63 #endif /* AUDIO_BACKEND_CPU_TIME_INFO_HPP */