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/thread.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/panner.h"
  34 #include "ardour/data_type.h"
  35 #include "ardour/region_factory.h"
  36
  37 using namespace std;
  38 using namespace ARDOUR;
  39 using namespace PBD;
  40
  41 #include "i18n.h"
  42
  43 Auditioner::Auditioner (Session& s)
  44         : AudioTrack (s, "auditioner", Route::Hidden)
  45         , current_frame (0)
  46         , _auditioning (0)
  47         , length (0)
  48         , via_monitor (false)
  49 {
  50 }
  51
  52 int
  53 Auditioner::init ()
  54 {
  55         if (Track::init ()) {
  56                 return -1;
  57         }
  58
  59         string left = _session.config.get_auditioner_output_left();
  60         string right = _session.config.get_auditioner_output_right();
  61
  62         if (left == "default") {
  63                 if (_session.monitor_out()) {
  64                         left = _session.monitor_out()->input()->audio (0)->name();
  65                         via_monitor = true;
  66                 } else {
  67                         left = _session.engine().get_nth_physical_output (DataType::AUDIO, 0);
  68                 }
  69         }
  70
  71         if (right == "default") {
  72                 if (_session.monitor_out()) {
  73                         right = _session.monitor_out()->input()->audio (1)->name();
  74                         via_monitor = true;
  75                 } else {
  76                         right = _session.engine().get_nth_physical_output (DataType::AUDIO, 1);
  77                 }
  78         }
  79
  80         if ((left.length() == 0) && (right.length() == 0)) {
  81                 warning << _("no outputs available for auditioner - manual connection required") << endmsg;
  82                 return -1;
  83         }
  84
  85         _main_outs->defer_pan_reset ();
  86
  87         if (left.length()) {
  88                 _output->add_port (left, this, DataType::AUDIO);
  89         }
  90
  91         if (right.length()) {
  92                 _output->add_port (right, this, DataType::AUDIO);
  93         }
  94
  95         _main_outs->allow_pan_reset ();
  96         _main_outs->reset_panner ();
  97
  98         _output->changed.connect_same_thread (*this, boost::bind (&Auditioner::output_changed, this, _1, _2));
  99
 100         return 0;
 101 }
 102
 103 Auditioner::~Auditioner ()
 104 {
 105 }
 106
 107 AudioPlaylist&
 108 Auditioner::prepare_playlist ()
 109 {
 110         // FIXME auditioner is still audio-only
 111         boost::shared_ptr<AudioPlaylist> apl = boost::dynamic_pointer_cast<AudioPlaylist>(_diskstream->playlist());
 112         assert(apl);
 113
 114         apl->clear ();
 115         return *apl;
 116 }
 117
 118 void
 119 Auditioner::audition_current_playlist ()
 120 {
 121         if (g_atomic_int_get (&_auditioning)) {
 122                 /* don't go via session for this, because we are going
 123                    to remain active.
 124                 */
 125                 cancel_audition ();
 126         }
 127
 128         Glib::Mutex::Lock lm (lock);
 129         _diskstream->seek (0);
 130         length = _diskstream->playlist()->get_maximum_extent();
 131         current_frame = 0;
 132
 133         /* force a panner reset now that we have all channels */
 134
 135         _main_outs->panner()->reset (n_outputs().n_audio(), _diskstream->n_channels().n_audio());
 136
 137         g_atomic_int_set (&_auditioning, 1);
 138 }
 139
 140 void
 141 Auditioner::audition_region (boost::shared_ptr<Region> region)
 142 {
 143         if (g_atomic_int_get (&_auditioning)) {
 144                 /* don't go via session for this, because we are going
 145                    to remain active.
 146                 */
 147                 cancel_audition ();
 148         }
 149
 150         if (boost::dynamic_pointer_cast<AudioRegion>(region) == 0) {
 151                 error << _("Auditioning of non-audio regions not yet supported") << endmsg;
 152                 return;
 153         }
 154
 155         Glib::Mutex::Lock lm (lock);
 156
 157         /* copy it */
 158
 159         boost::shared_ptr<AudioRegion> the_region (boost::dynamic_pointer_cast<AudioRegion> (RegionFactory::create (region)));
 160         the_region->set_position (0, this);
 161
 162         _diskstream->playlist()->drop_regions ();
 163         _diskstream->playlist()->add_region (the_region, 0, 1);
 164
 165         if (_diskstream->n_channels().n_audio() < the_region->n_channels()) {
 166                 audio_diskstream()->add_channel (the_region->n_channels() - _diskstream->n_channels().n_audio());
 167         } else if (_diskstream->n_channels().n_audio() > the_region->n_channels()) {
 168                 audio_diskstream()->remove_channel (_diskstream->n_channels().n_audio() - the_region->n_channels());
 169         }
 170
 171         ProcessorStreams ps;
 172         if (configure_processors (&ps)) {
 173                 error << string_compose (_("Cannot setup auditioner processing flow for %1 channels"),
 174                                          _diskstream->n_channels()) << endmsg;
 175                 return;
 176         }
 177
 178         /* force a panner reset now that we have all channels */
 179
 180         _main_outs->reset_panner();
 181
 182         length = the_region->length();
 183
 184         int dir;
 185         nframes_t offset = the_region->sync_offset (dir);
 186
 187         /* can't audition from a negative sync point */
 188
 189         if (dir < 0) {
 190                 offset = 0;
 191         }
 192
 193         _diskstream->seek (offset);
 194         current_frame = offset;
 195
 196         g_atomic_int_set (&_auditioning, 1);
 197 }
 198
 199 int
 200 Auditioner::play_audition (nframes_t nframes)
 201 {
 202         bool need_butler;
 203         nframes_t this_nframes;
 204         int ret;
 205
 206         if (g_atomic_int_get (&_auditioning) == 0) {
 207                 silence (nframes);
 208                 return 0;
 209         }
 210
 211         this_nframes = min (nframes, length - current_frame);
 212
 213         _diskstream->prepare ();
 214
 215         if ((ret = roll (this_nframes, current_frame, current_frame + nframes, false, false, false)) != 0) {
 216                 silence (nframes);
 217                 return ret;
 218         }
 219
 220         need_butler = _diskstream->commit (this_nframes);
 221         current_frame += this_nframes;
 222
 223         if (current_frame >= length) {
 224                 _session.cancel_audition ();
 225                 return 0;
 226         } else {
 227                 return need_butler ? 1 : 0;
 228         }
 229 }
 230
 231 void
 232 Auditioner::output_changed (IOChange change, void* /*src*/)
 233 {
 234         if (change & ConnectionsChanged) {
 235                 string phys;
 236                 vector<string> connections;
 237                 if (_output->nth (0)->get_connections (connections)) {
 238                         phys = _session.engine().get_nth_physical_output (DataType::AUDIO, 0);
 239                         if (phys != connections[0]) {
 240                                 _session.config.set_auditioner_output_left (connections[0]);
 241                         } else {
 242                                 _session.config.set_auditioner_output_left ("default");
 243                         }
 244                 } else {
 245                         _session.config.set_auditioner_output_left ("");
 246                 }
 247
 248                 connections.clear ();
 249
 250                 if (_output->nth (1)->get_connections (connections)) {
 251                         phys = _session.engine().get_nth_physical_output (DataType::AUDIO, 1);
 252                         if (phys != connections[0]) {
 253                                 _session.config.set_auditioner_output_right (connections[0]);
 254                         } else {
 255                                 _session.config.set_auditioner_output_right ("default");
 256                         }
 257                 } else {
 258                         _session.config.set_auditioner_output_right ("");
 259                 }
 260         }
 261 }