libs/ardour/process_thread.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 #include "ardour/audioengine.h"
  22 #include "ardour/buffer.h"
  23 #include "ardour/buffer_manager.h"
  24 #include "ardour/buffer_set.h"
  25 #include "ardour/process_thread.h"
  26 #include "ardour/thread_buffers.h"
  27
  28 using namespace ARDOUR;
  29 using namespace Glib;
  30 using namespace std;
  31
  32 Private<ThreadBuffers>* ProcessThread::_private_thread_buffers = 0;
  33
  34 static void
  35 release_thread_buffer (void* arg)
  36 {
  37         BufferManager::put_thread_buffers ((ThreadBuffers*) arg);
  38 }
  39
  40 void
  41 ProcessThread::init ()
  42 {
  43         _private_thread_buffers = new Private<ThreadBuffers> (release_thread_buffer);
  44 }
  45
  46 ProcessThread::ProcessThread ()
  47         : _thread (0)
  48 {
  49 }
  50
  51 ProcessThread::~ProcessThread ()
  52 {
  53 }
  54
  55 void
  56 ProcessThread::get_buffers ()
  57 {
  58         ThreadBuffers* tb = BufferManager::get_thread_buffers ();
  59
  60         assert (tb);
  61         _private_thread_buffers->set (tb);
  62 }
  63
  64 void
  65 ProcessThread::drop_buffers ()
  66 {
  67         ThreadBuffers* tb = _private_thread_buffers->get();
  68         assert (tb);
  69         BufferManager::put_thread_buffers (tb);
  70         _private_thread_buffers->set (0);
  71 }
  72
  73 BufferSet&
  74 ProcessThread::get_silent_buffers (ChanCount count)
  75 {
  76         ThreadBuffers* tb = _private_thread_buffers->get();
  77         assert (tb);
  78
  79         BufferSet* sb = tb->silent_buffers;
  80         assert (sb);
  81
  82         assert(sb->available() >= count);
  83         sb->set_count(count);
  84
  85         for (DataType::iterator t = DataType::begin(); t != DataType::end(); ++t) {
  86                 for (size_t i= 0; i < count.get(*t); ++i) {
  87                         sb->get(*t, i).clear();
  88                 }
  89         }
  90
  91         return *sb;
  92 }
  93
  94 BufferSet&
  95 ProcessThread::get_scratch_buffers (ChanCount count)
  96 {
  97         ThreadBuffers* tb = _private_thread_buffers->get();
  98         assert (tb);
  99
 100         BufferSet* sb = tb->scratch_buffers;
 101         assert (sb);
 102
 103         if (count != ChanCount::ZERO) {
 104                 assert(sb->available() >= count);
 105                 sb->set_count (count);
 106         } else {
 107                 sb->set_count (sb->available());
 108         }
 109
 110         return *sb;
 111 }
 112
 113 BufferSet&
 114 ProcessThread::get_mix_buffers (ChanCount count)
 115 {
 116         ThreadBuffers* tb = _private_thread_buffers->get();
 117         assert (tb);
 118
 119         BufferSet* mb = tb->mix_buffers;
 120
 121         assert (mb);
 122         assert (mb->available() >= count);
 123         mb->set_count(count);
 124         return *mb;
 125 }
 126
 127 gain_t*
 128 ProcessThread::gain_automation_buffer()
 129 {
 130         ThreadBuffers* tb = _private_thread_buffers->get();
 131         assert (tb);
 132
 133         gain_t *g =  tb->gain_automation_buffer;
 134         assert (g);
 135         return g;
 136 }
 137
 138 pan_t**
 139 ProcessThread::pan_automation_buffer()
 140 {
 141         ThreadBuffers* tb = _private_thread_buffers->get();
 142         assert (tb);
 143
 144         pan_t** p = tb->pan_automation_buffer;
 145         assert (p);
 146         return p;
 147 }