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