libs/ardour/thread_buffers.cc

   1 /*
   2     Copyright (C) 2010 Paul Davis
   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; if not, write to the Free Software
  16     Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  17
  18 */
  19
  20 #include <iostream>
  21
  22 #include "ardour/audioengine.h"
  23 #include "ardour/buffer_set.h"
  24 #include "ardour/thread_buffers.h"
  25
  26 using namespace ARDOUR;
  27 using namespace std;
  28
  29 ThreadBuffers::ThreadBuffers ()
  30         : silent_buffers (new BufferSet)
  31         , scratch_buffers (new BufferSet)
  32         , mix_buffers (new BufferSet)
  33         , gain_automation_buffer (0)
  34         , pan_automation_buffer (0)
  35         , npan_buffers (0)
  36 {
  37 }
  38
  39 void
  40 ThreadBuffers::ensure_buffers (ChanCount howmany)
  41 {
  42         // std::cerr << "ThreadBuffers " << this << " resize buffers with count = " << howmany << std::endl;
  43
  44         /* this is all protected by the process lock in the Session
  45          */
  46
  47         if (howmany.n_total() == 0) {
  48                 return;
  49         }
  50
  51         AudioEngine* _engine = AudioEngine::instance ();
  52
  53         for (DataType::iterator t = DataType::begin(); t != DataType::end(); ++t) {
  54                 size_t count = std::max (scratch_buffers->available().get(*t), howmany.get(*t));
  55                 size_t size = _engine->raw_buffer_size (*t);
  56
  57                 scratch_buffers->ensure_buffers (*t, count, size);
  58                 mix_buffers->ensure_buffers (*t, count, size);
  59                 silent_buffers->ensure_buffers (*t, count, size);
  60         }
  61
  62         delete [] gain_automation_buffer;
  63         gain_automation_buffer = new gain_t[_engine->raw_buffer_size (DataType::AUDIO)];
  64
  65         allocate_pan_automation_buffers (_engine->raw_buffer_size (DataType::AUDIO), howmany.n_audio(), false);
  66 }
  67
  68 void
  69 ThreadBuffers::allocate_pan_automation_buffers (nframes_t nframes, uint32_t howmany, bool force)
  70 {
  71         if (!force && howmany <= npan_buffers) {
  72                 return;
  73         }
  74
  75         if (pan_automation_buffer) {
  76
  77                 for (uint32_t i = 0; i < npan_buffers; ++i) {
  78                         delete [] pan_automation_buffer[i];
  79                 }
  80
  81                 delete [] pan_automation_buffer;
  82         }
  83
  84         pan_automation_buffer = new pan_t*[howmany];
  85
  86         for (uint32_t i = 0; i < howmany; ++i) {
  87                 pan_automation_buffer[i] = new pan_t[nframes];
  88         }
  89
  90         npan_buffers = howmany;
  91 }