libs/ardour/auditioner.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 <glibmm/threads.h>
  21
  22 #include "pbd/error.h"
  23
  24 #include "ardour/audio_diskstream.h"
  25 #include "ardour/audioregion.h"
  26 #include "ardour/audioengine.h"
  27 #include "ardour/delivery.h"
  28 #include "ardour/route.h"
  29 #include "ardour/session.h"
  30 #include "ardour/auditioner.h"
  31 #include "ardour/audioplaylist.h"
  32 #include "ardour/audio_port.h"
  33 #include "ardour/data_type.h"
  34 #include "ardour/region_factory.h"
  35
  36 using namespace std;
  37 using namespace ARDOUR;
  38 using namespace PBD;
  39
  40 #include "i18n.h"
  41
  42 Auditioner::Auditioner (Session& s)
  43         : AudioTrack (s, "auditioner", Route::Auditioner)
  44         , current_frame (0)
  45         , _auditioning (0)
  46         , length (0)
  47         , via_monitor (false)
  48 {
  49 }
  50
  51 int
  52 Auditioner::init ()
  53 {
  54         if (Track::init ()) {
  55                 return -1;
  56         }
  57
  58         if (connect ()) {
  59                 return -1;
  60         }
  61
  62         _output->changed.connect_same_thread (*this, boost::bind (&Auditioner::output_changed, this, _1, _2));
  63
  64         return 0;
  65 }
  66
  67 Auditioner::~Auditioner ()
  68 {
  69 }
  70
  71 int
  72 Auditioner::connect ()
  73 {
  74         string left = Config->get_auditioner_output_left();
  75         string right = Config->get_auditioner_output_right();
  76
  77         vector<string> outputs;
  78         _session.engine().get_physical_outputs (DataType::AUDIO, outputs);
  79
  80         via_monitor = false;
  81
  82         if (left.empty() || left == "default") {
  83                 if (_session.monitor_out()) {
  84                         left = _session.monitor_out()->input()->audio (0)->name();
  85                         via_monitor = true;
  86                 } else {
  87                         if (outputs.size() > 0) {
  88                                 left = outputs[0];
  89                         }
  90                 }
  91         }
  92
  93         if (right.empty() || right == "default") {
  94                 if (_session.monitor_out()) {
  95                         right = _session.monitor_out()->input()->audio (1)->name();
  96                         via_monitor = true;
  97                 } else {
  98                         if (outputs.size() > 1) {
  99                                 right = outputs[1];
 100                         }
 101                 }
 102         }
 103
 104         _output->disconnect (this);
 105
 106         if (left.empty() && right.empty()) {
 107                 if (_output->n_ports().n_audio() == 0) {
 108                         /* ports not set up, so must be during startup */
 109                         warning << _("no outputs available for auditioner - manual connection required") << endmsg;
 110                 }
 111         } else {
 112
 113                 if (_output->n_ports().n_audio() == 0) {
 114
 115                         /* create (and connect) new ports */
 116
 117                         _main_outs->defer_pan_reset ();
 118
 119                         if (left.length()) {
 120                                 _output->add_port (left, this, DataType::AUDIO);
 121                         }
 122
 123                         if (right.length()) {
 124                                 _output->add_port (right, this, DataType::AUDIO);
 125                         }
 126
 127                         _main_outs->allow_pan_reset ();
 128                         _main_outs->reset_panner ();
 129
 130                 } else {
 131
 132                         /* reconnect existing ports */
 133
 134                         boost::shared_ptr<Port> oleft (_output->nth (0));
 135                         boost::shared_ptr<Port> oright (_output->nth (1));
 136                         if (oleft) {
 137                                 oleft->connect (left);
 138                         }
 139                         if (oright) {
 140                                 oright->connect (right);
 141                         }
 142                 }
 143
 144         }
 145
 146         return 0;
 147 }
 148
 149 AudioPlaylist&
 150 Auditioner::prepare_playlist ()
 151 {
 152         // FIXME auditioner is still audio-only
 153         boost::shared_ptr<AudioPlaylist> apl = boost::dynamic_pointer_cast<AudioPlaylist>(_diskstream->playlist());
 154         assert(apl);
 155
 156         apl->clear ();
 157         return *apl;
 158 }
 159
 160 void
 161 Auditioner::audition_region (boost::shared_ptr<Region> region)
 162 {
 163         if (g_atomic_int_get (&_auditioning)) {
 164                 /* don't go via session for this, because we are going
 165                    to remain active.
 166                 */
 167                 cancel_audition ();
 168         }
 169
 170         if (boost::dynamic_pointer_cast<AudioRegion>(region) == 0) {
 171                 error << _("Auditioning of non-audio regions not yet supported") << endmsg;
 172                 return;
 173         }
 174
 175         Glib::Threads::Mutex::Lock lm (lock);
 176
 177         /* copy it */
 178
 179         boost::shared_ptr<AudioRegion> the_region (boost::dynamic_pointer_cast<AudioRegion> (RegionFactory::create (region)));
 180         the_region->set_position (0);
 181
 182         _diskstream->playlist()->drop_regions ();
 183         _diskstream->playlist()->add_region (the_region, 0, 1);
 184
 185         if (_diskstream->n_channels().n_audio() < the_region->n_channels()) {
 186                 audio_diskstream()->add_channel (the_region->n_channels() - _diskstream->n_channels().n_audio());
 187         } else if (_diskstream->n_channels().n_audio() > the_region->n_channels()) {
 188                 audio_diskstream()->remove_channel (_diskstream->n_channels().n_audio() - the_region->n_channels());
 189         }
 190
 191         ProcessorStreams ps;
 192         {
 193                 Glib::Threads::Mutex::Lock lm (AudioEngine::instance()->process_lock ());
 194
 195                 if (configure_processors (&ps)) {
 196                         error << string_compose (_("Cannot setup auditioner processing flow for %1 channels"),
 197                                                  _diskstream->n_channels()) << endmsg;
 198                         return;
 199                 }
 200         }
 201
 202         /* force a panner reset now that we have all channels */
 203
 204         _main_outs->reset_panner();
 205
 206         length = the_region->length();
 207
 208         int dir;
 209         framecnt_t offset = the_region->sync_offset (dir);
 210
 211         /* can't audition from a negative sync point */
 212
 213         if (dir < 0) {
 214                 offset = 0;
 215         }
 216
 217         _diskstream->seek (offset);
 218         current_frame = offset;
 219
 220         g_atomic_int_set (&_auditioning, 1);
 221 }
 222
 223 int
 224 Auditioner::play_audition (framecnt_t nframes)
 225 {
 226         bool need_butler = false;
 227         framecnt_t this_nframes;
 228         int ret;
 229
 230         if (g_atomic_int_get (&_auditioning) == 0) {
 231                 silence (nframes);
 232                 return 0;
 233         }
 234
 235         this_nframes = min (nframes, length - current_frame);
 236
 237         if ((ret = roll (this_nframes, current_frame, current_frame + nframes, false, need_butler)) != 0) {
 238                 silence (nframes);
 239                 return ret;
 240         }
 241
 242         current_frame += this_nframes;
 243
 244         if (current_frame >= length) {
 245                 _session.cancel_audition ();
 246                 return 0;
 247         } else {
 248                 return need_butler ? 1 : 0;
 249         }
 250 }
 251
 252 void
 253 Auditioner::output_changed (IOChange change, void* /*src*/)
 254 {
 255         if (change.type & IOChange::ConnectionsChanged) {
 256                 string phys;
 257                 vector<string> connections;
 258                 vector<string> outputs;
 259                 _session.engine().get_physical_outputs (DataType::AUDIO, outputs);
 260                 if (_output->nth (0)->get_connections (connections)) {
 261                         if (outputs.size() > 0) {
 262                                 phys = outputs[0];
 263                         }
 264                         if (phys != connections[0]) {
 265                                 Config->set_auditioner_output_left (connections[0]);
 266                         } else {
 267                                 Config->set_auditioner_output_left ("default");
 268                         }
 269                 } else {
 270                         Config->set_auditioner_output_left ("");
 271                 }
 272
 273                 connections.clear ();
 274
 275                 if (_output->nth (1)->get_connections (connections)) {
 276                         if (outputs.size() > 1) {
 277                                 phys = outputs[1];
 278                         }
 279                         if (phys != connections[0]) {
 280                                 Config->set_auditioner_output_right (connections[0]);
 281                         } else {
 282                                 Config->set_auditioner_output_right ("default");
 283                         }
 284                 } else {
 285                         Config->set_auditioner_output_right ("");
 286                 }
 287         }
 288 }
 289
 290 ChanCount
 291 Auditioner::input_streams () const
 292 {
 293         /* auditioner never has any inputs - its channel configuration
 294            depends solely on the region we are auditioning.
 295         */
 296
 297         if (audio_diskstream()) {
 298                 return audio_diskstream()->n_channels();
 299         }
 300
 301         return ChanCount ();
 302 }
 303
 304 MonitorState
 305 Auditioner::monitoring_state () const
 306 {
 307         return MonitoringDisk;
 308 }