libs/ardour/send.cc

   1 /*
   2     Copyright (C) 2000 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 <algorithm>
  22
  23 #include "pbd/xml++.h"
  24
  25 #include "ardour/amp.h"
  26 #include "ardour/send.h"
  27 #include "ardour/session.h"
  28 #include "ardour/port.h"
  29 #include "ardour/audio_port.h"
  30 #include "ardour/buffer_set.h"
  31 #include "ardour/meter.h"
  32 #include "ardour/panner.h"
  33 #include "ardour/io.h"
  34
  35 #include "i18n.h"
  36
  37 using namespace ARDOUR;
  38 using namespace PBD;
  39 using namespace std;
  40
  41 Send::Send (Session& s, boost::shared_ptr<MuteMaster> mm, Role r)
  42         : Delivery (s, mm, string_compose (_("send %1"), (_bitslot = s.next_send_id()) + 1), r)
  43         , _metering (false)
  44 {
  45         _amp.reset (new Amp (_session, _mute_master));
  46         _meter.reset (new PeakMeter (_session));
  47
  48         ProcessorCreated (this); /* EMIT SIGNAL */
  49 }
  50
  51 Send::Send (Session& s, boost::shared_ptr<MuteMaster> mm, const XMLNode& node, int version, Role r)
  52         : Delivery (s, mm, "send", r)
  53         , _metering (false)
  54 {
  55         _amp.reset (new Amp (_session, _mute_master));
  56         _meter.reset (new PeakMeter (_session));
  57
  58         if (set_state (node, version)) {
  59                 throw failed_constructor();
  60         }
  61
  62         ProcessorCreated (this); /* EMIT SIGNAL */
  63 }
  64
  65 Send::~Send ()
  66 {
  67 }
  68
  69 void
  70 Send::activate ()
  71 {
  72         _amp->activate ();
  73         _meter->activate ();
  74
  75         Processor::activate ();
  76 }
  77
  78 void
  79 Send::deactivate ()
  80 {
  81         _amp->deactivate ();
  82         _meter->deactivate ();
  83         _meter->reset ();
  84
  85         Processor::deactivate ();
  86 }
  87
  88 void
  89 Send::run (BufferSet& bufs, sframes_t start_frame, sframes_t end_frame, nframes_t nframes, bool)
  90 {
  91         if (_output->n_ports() == ChanCount::ZERO) {
  92                 _meter->reset ();
  93                 _active = _pending_active;
  94                 return;
  95         }
  96
  97         if (!_active && !_pending_active) {
  98                 _meter->reset ();
  99                 _output->silence (nframes);
 100                 _active = _pending_active;
 101                 return;
 102         }
 103
 104         // we have to copy the input, because deliver_output() may alter the buffers
 105         // in-place, which a send must never do.
 106
 107         BufferSet& sendbufs = _session.get_mix_buffers (bufs.count());
 108         sendbufs.read_from (bufs, nframes);
 109         assert(sendbufs.count() == bufs.count());
 110
 111         /* gain control */
 112
 113         // Can't automate gain for sends or returns yet because we need different buffers
 114         // so that we don't overwrite the main automation data for the route amp
 115         // _amp->setup_gain_automation (start_frame, end_frame, nframes);
 116         _amp->run (sendbufs, start_frame, end_frame, nframes, true);
 117
 118         /* deliver to outputs */
 119
 120         Delivery::run (sendbufs, start_frame, end_frame, nframes, true);
 121
 122         /* consider metering */
 123
 124         if (_metering) {
 125                 if (_amp->gain_control()->get_value() == 0) {
 126                         _meter->reset();
 127                 } else {
 128                         _meter->run (*_output_buffers, start_frame, end_frame, nframes, true);
 129                 }
 130         }
 131
 132         /* _active was set to _pending_active by Delivery::run() */
 133 }
 134
 135 XMLNode&
 136 Send::get_state(void)
 137 {
 138         return state (true);
 139 }
 140
 141 XMLNode&
 142 Send::state(bool full)
 143 {
 144         XMLNode& node = Delivery::state(full);
 145         char buf[32];
 146
 147         node.add_property ("type", "send");
 148         snprintf (buf, sizeof (buf), "%" PRIu32, _bitslot);
 149         node.add_property ("bitslot", buf);
 150
 151         return node;
 152 }
 153
 154 int
 155 Send::set_state (const XMLNode& node, int version)
 156 {
 157         XMLNodeList nlist = node.children();
 158         XMLNodeIterator niter;
 159         const XMLProperty* prop;
 160
 161         if ((prop = node.property ("bitslot")) == 0) {
 162                 _bitslot = _session.next_send_id();
 163         } else {
 164                 sscanf (prop->value().c_str(), "%" PRIu32, &_bitslot);
 165                 _session.mark_send_id (_bitslot);
 166         }
 167
 168         const XMLNode* insert_node = &node;
 169
 170         /* XXX need to load automation state & data for amp */
 171
 172         Delivery::set_state (*insert_node, version);
 173
 174         return 0;
 175 }
 176
 177 bool
 178 Send::can_support_io_configuration (const ChanCount& in, ChanCount& out) const
 179 {
 180         /* sends have no impact at all on the channel configuration of the
 181            streams passing through the route. so, out == in.
 182         */
 183
 184         out = in;
 185         return true;
 186 }
 187
 188 bool
 189 Send::configure_io (ChanCount in, ChanCount out)
 190 {
 191         if (!_amp->configure_io (in, out) || !_meter->configure_io (in, out)) {
 192                 return false;
 193         }
 194
 195         if (!Processor::configure_io (in, out)) {
 196                 return false;
 197         }
 198
 199         reset_panner ();
 200
 201         return true;
 202 }
 203
 204 /** Set up the XML description of a send so that its name is unique.
 205  *  @param state XML send state.
 206  *  @param session Session.
 207  */
 208 void
 209 Send::make_unique (XMLNode &state, Session &session)
 210 {
 211         uint32_t const bitslot = session.next_send_id() + 1;
 212
 213         char buf[32];
 214         snprintf (buf, sizeof (buf), "%" PRIu32, bitslot);
 215         state.property("bitslot")->set_value (buf);
 216
 217         string const name = string_compose (_("send %1"), bitslot);
 218
 219         state.property("name")->set_value (name);
 220
 221         XMLNode* io = state.child ("IO");
 222
 223         if (io) {
 224                 io->property("name")->set_value (name);
 225         }
 226 }
 227
 228 bool
 229 Send::set_name (const string& new_name)
 230 {
 231         string unique_name;
 232
 233         if (_role == Delivery::Send) {
 234                 char buf[32];
 235
 236                 /* rip any existing numeric part of the name, and append the bitslot
 237                  */
 238
 239                 string::size_type last_letter = new_name.find_last_not_of ("0123456789");
 240
 241                 if (last_letter != string::npos) {
 242                         unique_name = new_name.substr (0, last_letter + 1);
 243                 } else {
 244                         unique_name = new_name;
 245                 }
 246
 247                 snprintf (buf, sizeof (buf), "%u", (_bitslot + 1));
 248                 unique_name += buf;
 249
 250         } else {
 251                 unique_name = new_name;
 252         }
 253
 254         return Delivery::set_name (unique_name);
 255 }
 256
 257 bool
 258 Send::display_to_user () const
 259 {
 260         /* we ignore Deliver::_display_to_user */
 261
 262 //      if (_role == Listen || _role == MainListen) {
 263 //              return false;
 264 //      }
 265
 266         return true;
 267 }