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
  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         if (_private_thread_buffers == 0) {
  44                 _private_thread_buffers = new Private<ThreadBuffers> (release_thread_buffer);
  45         }
  46 }
  47
  48 ProcessThread::ProcessThread ()
  49 {
  50 }
  51
  52 ProcessThread::~ProcessThread ()
  53 {
  54 }
  55
  56 void
  57 ProcessThread::get_buffers ()
  58 {
  59         ThreadBuffers* tb = BufferManager::get_thread_buffers ();
  60
  61         assert (tb);
  62         _private_thread_buffers->set (tb);
  63 }
  64
  65 void
  66 ProcessThread::drop_buffers ()
  67 {
  68         ThreadBuffers* tb = _private_thread_buffers->get();
  69         assert (tb);
  70         BufferManager::put_thread_buffers (tb);
  71         _private_thread_buffers->set (0);
  72 }
  73
  74 BufferSet&
  75 ProcessThread::get_silent_buffers (ChanCount count)
  76 {
  77         ThreadBuffers* tb = _private_thread_buffers->get();
  78         assert (tb);
  79
  80         BufferSet* sb = tb->silent_buffers;
  81         assert (sb);
  82
  83         assert(sb->available() >= count);
  84         sb->set_count(count);
  85
  86         for (DataType::iterator t = DataType::begin(); t != DataType::end(); ++t) {
  87                 for (size_t i= 0; i < count.get(*t); ++i) {
  88                         sb->get(*t, i).clear();
  89                 }
  90         }
  91
  92         return *sb;
  93 }
  94
  95 BufferSet&
  96 ProcessThread::get_scratch_buffers (ChanCount count)
  97 {
  98         ThreadBuffers* tb = _private_thread_buffers->get();
  99         assert (tb);
 100
 101         BufferSet* sb = tb->scratch_buffers;
 102         assert (sb);
 103
 104         if (count != ChanCount::ZERO) {
 105                 assert(sb->available() >= count);
 106                 sb->set_count (count);
 107         } else {
 108                 sb->set_count (sb->available());
 109         }
 110
 111         return *sb;
 112 }
 113
 114 BufferSet&
 115 ProcessThread::get_mix_buffers (ChanCount count)
 116 {
 117         ThreadBuffers* tb = _private_thread_buffers->get();
 118         assert (tb);
 119
 120         BufferSet* mb = tb->mix_buffers;
 121
 122         assert (mb);
 123         assert (mb->available() >= count);
 124         mb->set_count(count);
 125         return *mb;
 126 }
 127
 128 gain_t*
 129 ProcessThread::gain_automation_buffer()
 130 {
 131         ThreadBuffers* tb = _private_thread_buffers->get();
 132         assert (tb);
 133
 134         gain_t *g =  tb->gain_automation_buffer;
 135         assert (g);
 136         return g;
 137 }
 138
 139 gain_t*
 140 ProcessThread::send_gain_automation_buffer()
 141 {
 142         ThreadBuffers* tb = _private_thread_buffers->get();
 143         assert (tb);
 144
 145         gain_t* g = tb->send_gain_automation_buffer;
 146         assert (g);
 147         return g;
 148 }
 149
 150 pan_t**
 151 ProcessThread::pan_automation_buffer()
 152 {
 153         ThreadBuffers* tb = _private_thread_buffers->get();
 154         assert (tb);
 155
 156         pan_t** p = tb->pan_automation_buffer;
 157         assert (p);
 158         return p;
 159 }