libs/ardour/io_processor.cc

   1 /*
   2     Copyright (C) 2001 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 <fstream>
  21 #include <algorithm>
  22 #include <string>
  23 #include <cerrno>
  24 #include <unistd.h>
  25 #include <sstream>
  26
  27
  28 #include "pbd/xml++.h"
  29 #include "pbd/enumwriter.h"
  30
  31 #include "ardour/io_processor.h"
  32 #include "ardour/session.h"
  33 #include "ardour/utils.h"
  34 #include "ardour/send.h"
  35 #include "ardour/port_insert.h"
  36 #include "ardour/plugin_insert.h"
  37 #include "ardour/io.h"
  38 #include "ardour/route.h"
  39
  40 #include "i18n.h"
  41
  42 using namespace std;
  43 using namespace ARDOUR;
  44 using namespace PBD;
  45
  46 /* create an IOProcessor that proxies to a new IO object */
  47
  48 IOProcessor::IOProcessor (Session& s, bool with_input, bool with_output,
  49                           const string& proc_name, const string io_name, DataType dtype)
  50         : Processor(s, proc_name)
  51 {
  52         /* these are true in this constructor whether we actually create the associated
  53            IO objects or not.
  54         */
  55
  56         _own_input = true;
  57         _own_output = true;
  58
  59         if (with_input) {
  60                 _input.reset (new IO(s, io_name.empty() ? proc_name : io_name, IO::Input, dtype));
  61         }
  62
  63         if (with_output) {
  64                 _output.reset (new IO(s, io_name.empty() ? proc_name : io_name, IO::Output, dtype));
  65         }
  66 }
  67
  68 /* create an IOProcessor that proxies to an existing IO object */
  69
  70 IOProcessor::IOProcessor (Session& s, boost::shared_ptr<IO> in, boost::shared_ptr<IO> out,
  71                           const string& proc_name, DataType /*dtype*/)
  72         : Processor(s, proc_name)
  73         , _input (in)
  74         , _output (out)
  75 {
  76         if (in) {
  77                 _own_input = false;
  78         } else {
  79                 _own_input = true;
  80         }
  81
  82         if (out) {
  83                 _own_output = false;
  84         } else {
  85                 _own_output = true;
  86         }
  87 }
  88
  89 IOProcessor::~IOProcessor ()
  90 {
  91 }
  92
  93 void
  94 IOProcessor::set_input (boost::shared_ptr<IO> io)
  95 {
  96         /* CALLER MUST HOLD PROCESS LOCK */
  97
  98         _input = io;
  99         _own_input = false;
 100 }
 101
 102 void
 103 IOProcessor::set_output (boost::shared_ptr<IO> io)
 104 {
 105         /* CALLER MUST HOLD PROCESS LOCK */
 106
 107         _output = io;
 108         _own_output = false;
 109 }
 110
 111 XMLNode&
 112 IOProcessor::state (bool full_state)
 113 {
 114         XMLNode& node (Processor::state (full_state));
 115
 116         if (_own_input) {
 117                 node.add_property ("own-input", "yes");
 118                 if (_input) {
 119                         XMLNode& i (_input->state (full_state));
 120                         // i.name() = X_("output");
 121                         node.add_child_nocopy (i);
 122                 }
 123         } else {
 124                 node.add_property ("own-input", "no");
 125                 if (_input) {
 126                         node.add_property ("input", _input->name());
 127                 }
 128         }
 129
 130         if (_own_output) {
 131                 node.add_property ("own-output", "yes");
 132                 if (_output) {
 133                         XMLNode& o (_output->state (full_state));
 134                         node.add_child_nocopy (o);
 135                 }
 136         } else {
 137                 node.add_property ("own-output", "no");
 138                 if (_output) {
 139                         node.add_property ("output", _output->name());
 140                 }
 141         }
 142
 143         return node;
 144 }
 145
 146 int
 147 IOProcessor::set_state (const XMLNode& node, int version)
 148 {
 149         const XMLProperty *prop;
 150         const XMLNode *io_node = 0;
 151
 152         Processor::set_state(node, version);
 153
 154         if ((prop = node.property ("own-input")) != 0) {
 155                 _own_input = string_is_affirmative (prop->value());
 156         }
 157
 158         if ((prop = node.property ("own-output")) != 0) {
 159                 _own_output = string_is_affirmative (prop->value());
 160         }
 161
 162         /* don't attempt to set state for a proxied IO that we don't own */
 163
 164         XMLNodeList nlist = node.children();
 165         XMLNodeIterator niter;
 166         const string instr = enum_2_string (IO::Input);
 167         const string outstr = enum_2_string (IO::Output);
 168
 169         if (_own_input) {
 170                 for (niter = nlist.begin(); niter != nlist.end(); ++niter) {
 171                         const XMLProperty* prop;
 172                         if ((prop = (*niter)->property ("name")) != 0) {
 173                                 if (_name == prop->value()) {
 174                                         if ((prop = (*niter)->property ("direction")) != 0) {
 175                                                 if (prop->value() == instr) {
 176                                                         io_node = (*niter);
 177                                                         break;
 178                                                 }
 179                                         }
 180                                 }
 181                         }
 182                 }
 183
 184                 if (io_node) {
 185                         _input->set_state(*io_node, version);
 186
 187                         // legacy sessions: use IO name
 188                         if ((prop = node.property ("name")) == 0) {
 189                                 set_name (_input->name());
 190                         }
 191
 192                 } else {
 193                         /* no input, which is OK */
 194                 }
 195
 196         }
 197
 198         if (_own_output) {
 199                 for (niter = nlist.begin(); niter != nlist.end(); ++niter) {
 200                         if ((*niter)->name() == "IO") {
 201                                 const XMLProperty* prop;
 202                                 if ((prop = (*niter)->property ("name")) != 0) {
 203                                         if (_name == prop->value()) {
 204                                                 if ((prop = (*niter)->property ("direction")) != 0) {
 205                                                         if (prop->value() == outstr) {
 206                                                                 io_node = (*niter);
 207                                                                 break;
 208                                                         }
 209                                                 }
 210                                         }
 211                                 }
 212                         }
 213                 }
 214
 215                 if (io_node) {
 216                         _output->set_state(*io_node, version);
 217
 218                         // legacy sessions: use IO name
 219                         if ((prop = node.property ("name")) == 0) {
 220                                 set_name (_output->name());
 221                         }
 222                 } else {
 223                         /* no output, which is OK */
 224                 }
 225         }
 226
 227         return 0;
 228 }
 229
 230 void
 231 IOProcessor::silence (nframes_t nframes)
 232 {
 233         if (_own_output && _output) {
 234                 _output->silence (nframes);
 235         }
 236 }
 237
 238 ChanCount
 239 IOProcessor::natural_output_streams() const
 240 {
 241         return _output ? _output->n_ports() : ChanCount::ZERO;
 242 }
 243
 244 ChanCount
 245 IOProcessor::natural_input_streams () const
 246 {
 247         return _input ? _input->n_ports() : ChanCount::ZERO;
 248 }
 249
 250 bool
 251 IOProcessor::set_name (const std::string& name)
 252 {
 253         bool ret = SessionObject::set_name (name);
 254
 255         if (ret && _own_input && _input) {
 256                 ret = _input->set_name (name);
 257         }
 258
 259         if (ret && _own_output && _output) {
 260                 ret = _output->set_name (name);
 261         }
 262
 263         return ret;
 264 }
 265
 266 bool
 267 IOProcessor::feeds (boost::shared_ptr<Route> other) const
 268 {
 269         return _output && _output->connected_to (other->input());
 270 }
 271
 272 void
 273 IOProcessor::disconnect ()
 274 {
 275         if (_input) {
 276                 _input->disconnect (this);
 277         }
 278
 279         if (_output) {
 280                 _output->disconnect (this);
 281         }
 282 }