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