libs/ardour/internal_send.cc

   1 /*
   2     Copyright (C) 2009 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 "pbd/error.h"
  21 #include "pbd/failed_constructor.h"
  22
  23 #include "ardour/amp.h"
  24 #include "ardour/internal_send.h"
  25 #include "ardour/meter.h"
  26 #include "ardour/route.h"
  27 #include "ardour/session.h"
  28
  29 #include "i18n.h"
  30
  31 using namespace PBD;
  32 using namespace ARDOUR;
  33 using namespace std;
  34
  35 InternalSend::InternalSend (Session& s, boost::shared_ptr<Pannable> p, boost::shared_ptr<MuteMaster> mm, boost::shared_ptr<Route> sendto, Delivery::Role role)
  36         : Send (s, p, mm, role)
  37 {
  38         if (sendto) {
  39                 if (use_target (sendto)) {
  40                         throw failed_constructor();
  41                 }
  42         }
  43
  44         _amp->set_gain (0, this);
  45 }
  46
  47 InternalSend::~InternalSend ()
  48 {
  49         if (_send_to) {
  50                 _send_to->remove_send_from_internal_return (this);
  51         }
  52 }
  53
  54 int
  55 InternalSend::use_target (boost::shared_ptr<Route> sendto)
  56 {
  57         if (_send_to) {
  58                 _send_to->remove_send_from_internal_return (this);
  59         }
  60
  61         _send_to = sendto;
  62
  63         _send_to->add_send_to_internal_return (this);
  64
  65         set_name (sendto->name());
  66         _send_to_id = _send_to->id();
  67
  68         target_connections.drop_connections ();
  69
  70         _send_to->DropReferences.connect_same_thread (target_connections, boost::bind (&InternalSend::send_to_going_away, this));
  71         _send_to->PropertyChanged.connect_same_thread (target_connections, boost::bind (&InternalSend::send_to_property_changed, this, _1));;
  72
  73         return 0;
  74 }
  75
  76
  77 void
  78 InternalSend::send_to_going_away ()
  79 {
  80         target_connections.drop_connections ();
  81         _send_to.reset ();
  82         _send_to_id = "0";
  83 }
  84
  85 void
  86 InternalSend::run (BufferSet& bufs, framepos_t start_frame, framepos_t end_frame, pframes_t nframes, bool)
  87 {
  88         if ((!_active && !_pending_active) || !_send_to) {
  89                 _meter->reset ();
  90                 return;
  91         }
  92
  93         // we have to copy the input, because we may alter the buffers with the amp
  94         // in-place, which a send must never do.
  95
  96         assert(mixbufs.available() >= bufs.count());
  97         mixbufs.read_from (bufs, nframes);
  98
  99         /* gain control */
 100
 101         gain_t tgain = target_gain ();
 102
 103         if (tgain != _current_gain) {
 104
 105                 /* target gain has changed */
 106
 107                 Amp::apply_gain (mixbufs, nframes, _current_gain, tgain);
 108                 _current_gain = tgain;
 109
 110         } else if (tgain == 0.0) {
 111
 112                 /* we were quiet last time, and we're still supposed to be quiet.
 113                 */
 114
 115                 _meter->reset ();
 116                 Amp::apply_simple_gain (mixbufs, nframes, 0.0);
 117                 goto out;
 118
 119         } else if (tgain != 1.0) {
 120
 121                 /* target gain has not changed, but is not zero or unity */
 122                 Amp::apply_simple_gain (mixbufs, nframes, tgain);
 123         }
 124
 125         // Can't automate gain for sends or returns yet because we need different buffers
 126         // so that we don't overwrite the main automation data for the route amp
 127         // _amp->setup_gain_automation (start_frame, end_frame, nframes);
 128
 129         _amp->run (mixbufs, start_frame, end_frame, nframes, true);
 130
 131         /* XXX NEED TO PAN */
 132
 133         /* consider metering */
 134
 135         if (_metering) {
 136                 if (_amp->gain_control()->get_value() == 0) {
 137                         _meter->reset();
 138                 } else {
 139                         _meter->run (mixbufs, start_frame, end_frame, nframes, true);
 140                 }
 141         }
 142
 143         /* target will pick up our output when it is ready */
 144
 145   out:
 146         _active = _pending_active;
 147 }
 148
 149 int
 150 InternalSend::set_block_size (pframes_t nframes)
 151 {
 152         mixbufs.ensure_buffers (_configured_input, nframes);
 153         return 0;
 154 }
 155
 156 bool
 157 InternalSend::feeds (boost::shared_ptr<Route> other) const
 158 {
 159         return _send_to == other;
 160 }
 161
 162 XMLNode&
 163 InternalSend::state (bool full)
 164 {
 165         XMLNode& node (Send::state (full));
 166
 167         /* this replaces any existing "type" property */
 168
 169         node.add_property ("type", "intsend");
 170
 171         if (_send_to) {
 172                 node.add_property ("target", _send_to->id().to_s());
 173         }
 174
 175         return node;
 176 }
 177
 178 XMLNode&
 179 InternalSend::get_state()
 180 {
 181         return state (true);
 182 }
 183
 184 int
 185 InternalSend::set_our_state (const XMLNode& node, int /*version*/)
 186 {
 187         const XMLProperty* prop;
 188
 189         if ((prop = node.property ("target")) != 0) {
 190
 191                 _send_to_id = prop->value();
 192
 193                 /* if we're loading a session, the target route may not have been
 194                    create yet. make sure we defer till we are sure that it should
 195                    exist.
 196                 */
 197
 198                 if (!IO::connecting_legal) {
 199                         IO::ConnectingLegal.connect_same_thread (connect_c, boost::bind (&InternalSend::connect_when_legal, this));
 200                 } else {
 201                         connect_when_legal ();
 202                 }
 203         }
 204
 205         return 0;
 206 }
 207
 208 int
 209 InternalSend::set_state (const XMLNode& node, int version)
 210 {
 211         Send::set_state (node, version);
 212         return set_our_state (node, version);
 213 }
 214
 215 int
 216 InternalSend::connect_when_legal ()
 217 {
 218         connect_c.disconnect ();
 219
 220         if (_send_to_id == "0") {
 221                 /* it vanished before we could connect */
 222                 return 0;
 223         }
 224
 225         boost::shared_ptr<Route> sendto;
 226
 227         if ((sendto = _session.route_by_id (_send_to_id)) == 0) {
 228                 error << X_("cannot find route to connect to") << endmsg;
 229                 return -1;
 230         }
 231
 232         return use_target (sendto);
 233 }
 234
 235 bool
 236 InternalSend::can_support_io_configuration (const ChanCount& in, ChanCount& out) const
 237 {
 238         out = in;
 239         return true;
 240 }
 241
 242 bool
 243 InternalSend::configure_io (ChanCount in, ChanCount out)
 244 {
 245         bool ret = Send::configure_io (in, out);
 246         set_block_size (_session.engine().frames_per_cycle());
 247         return ret;
 248 }
 249
 250 bool
 251 InternalSend::set_name (const string& str)
 252 {
 253         /* rules for external sends don't apply to us */
 254         return IOProcessor::set_name (str);
 255 }
 256
 257 string
 258 InternalSend::display_name () const
 259 {
 260         if (_role == Aux) {
 261                 return string_compose (X_("aux-%1"), _name);
 262         } else {
 263                 return _name;
 264         }
 265 }
 266
 267 bool
 268 InternalSend::visible () const
 269 {
 270         if (_role == Aux) {
 271                 return true;
 272         }
 273
 274         return false;
 275 }
 276
 277 void
 278 InternalSend::send_to_property_changed (const PropertyChange& what_changed)
 279 {
 280         if (what_changed.contains (Properties::name)) {
 281                 set_name (_send_to->name ());
 282         }
 283 }