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         string left = Config->get_auditioner_output_left();
  59         string right = Config->get_auditioner_output_right();
  60
  61         vector<string> outputs;
  62         _session.engine().get_physical_outputs (DataType::AUDIO, outputs);
  63
  64         if (left.empty() || left == "default") {
  65                 if (_session.monitor_out()) {
  66                         left = _session.monitor_out()->input()->audio (0)->name();
  67                         via_monitor = true;
  68                 } else {
  69                         if (outputs.size() > 0) {
  70                                 left = outputs[0];
  71                         }
  72                 }
  73         }
  74
  75         if (right.empty() || right == "default") {
  76                 if (_session.monitor_out()) {
  77                         right = _session.monitor_out()->input()->audio (1)->name();
  78                         via_monitor = true;
  79                 } else {
  80                         if (outputs.size() > 1) {
  81                                 right = outputs[1];
  82                         }
  83                 }
  84         }
  85
  86         if (left.empty() && right.empty()) {
  87                 warning << _("no outputs available for auditioner - manual connection required") << endmsg;
  88         } else {
  89
  90                 _main_outs->defer_pan_reset ();
  91
  92                 if (left.length()) {
  93                         _output->add_port (left, this, DataType::AUDIO);
  94                 }
  95
  96                 if (right.length()) {
  97                         _output->add_port (right, this, DataType::AUDIO);
  98                 }
  99
 100                 _main_outs->allow_pan_reset ();
 101                 _main_outs->reset_panner ();
 102         }
 103
 104         _output->changed.connect_same_thread (*this, boost::bind (&Auditioner::output_changed, this, _1, _2));
 105
 106         return 0;
 107 }
 108
 109 Auditioner::~Auditioner ()
 110 {
 111 }
 112
 113 AudioPlaylist&
 114 Auditioner::prepare_playlist ()
 115 {
 116         // FIXME auditioner is still audio-only
 117         boost::shared_ptr<AudioPlaylist> apl = boost::dynamic_pointer_cast<AudioPlaylist>(_diskstream->playlist());
 118         assert(apl);
 119
 120         apl->clear ();
 121         return *apl;
 122 }
 123
 124 void
 125 Auditioner::audition_region (boost::shared_ptr<Region> region)
 126 {
 127         if (g_atomic_int_get (&_auditioning)) {
 128                 /* don't go via session for this, because we are going
 129                    to remain active.
 130                 */
 131                 cancel_audition ();
 132         }
 133
 134         if (boost::dynamic_pointer_cast<AudioRegion>(region) == 0) {
 135                 error << _("Auditioning of non-audio regions not yet supported") << endmsg;
 136                 return;
 137         }
 138
 139         Glib::Threads::Mutex::Lock lm (lock);
 140
 141         /* copy it */
 142
 143         boost::shared_ptr<AudioRegion> the_region (boost::dynamic_pointer_cast<AudioRegion> (RegionFactory::create (region)));
 144         the_region->set_position (0);
 145
 146         _diskstream->playlist()->drop_regions ();
 147         _diskstream->playlist()->add_region (the_region, 0, 1);
 148
 149         if (_diskstream->n_channels().n_audio() < the_region->n_channels()) {
 150                 audio_diskstream()->add_channel (the_region->n_channels() - _diskstream->n_channels().n_audio());
 151         } else if (_diskstream->n_channels().n_audio() > the_region->n_channels()) {
 152                 audio_diskstream()->remove_channel (_diskstream->n_channels().n_audio() - the_region->n_channels());
 153         }
 154
 155         ProcessorStreams ps;
 156         {
 157                 Glib::Threads::Mutex::Lock lm (AudioEngine::instance()->process_lock ());
 158
 159                 if (configure_processors (&ps)) {
 160                         error << string_compose (_("Cannot setup auditioner processing flow for %1 channels"),
 161                                                  _diskstream->n_channels()) << endmsg;
 162                         return;
 163                 }
 164         }
 165
 166         /* force a panner reset now that we have all channels */
 167
 168         _main_outs->reset_panner();
 169
 170         length = the_region->length();
 171
 172         int dir;
 173         framecnt_t offset = the_region->sync_offset (dir);
 174
 175         /* can't audition from a negative sync point */
 176
 177         if (dir < 0) {
 178                 offset = 0;
 179         }
 180
 181         _diskstream->seek (offset);
 182         current_frame = offset;
 183
 184         g_atomic_int_set (&_auditioning, 1);
 185 }
 186
 187 int
 188 Auditioner::play_audition (framecnt_t nframes)
 189 {
 190         bool need_butler = false;
 191         framecnt_t this_nframes;
 192         int ret;
 193
 194         if (g_atomic_int_get (&_auditioning) == 0) {
 195                 silence (nframes);
 196                 return 0;
 197         }
 198
 199         this_nframes = min (nframes, length - current_frame);
 200
 201         if ((ret = roll (this_nframes, current_frame, current_frame + nframes, false, need_butler)) != 0) {
 202                 silence (nframes);
 203                 return ret;
 204         }
 205
 206         current_frame += this_nframes;
 207
 208         if (current_frame >= length) {
 209                 _session.cancel_audition ();
 210                 return 0;
 211         } else {
 212                 return need_butler ? 1 : 0;
 213         }
 214 }
 215
 216 void
 217 Auditioner::output_changed (IOChange change, void* /*src*/)
 218 {
 219         if (change.type & IOChange::ConnectionsChanged) {
 220                 string phys;
 221                 vector<string> connections;
 222                 vector<string> outputs;
 223                 _session.engine().get_physical_outputs (DataType::AUDIO, outputs);
 224                 if (_output->nth (0)->get_connections (connections)) {
 225                         if (outputs.size() > 0) {
 226                                 phys = outputs[0];
 227                         }
 228                         if (phys != connections[0]) {
 229                                 Config->set_auditioner_output_left (connections[0]);
 230                         } else {
 231                                 Config->set_auditioner_output_left ("default");
 232                         }
 233                 } else {
 234                         Config->set_auditioner_output_left ("");
 235                 }
 236
 237                 connections.clear ();
 238
 239                 if (_output->nth (1)->get_connections (connections)) {
 240                         if (outputs.size() > 1) {
 241                                 phys = outputs[1];
 242                         }
 243                         if (phys != connections[0]) {
 244                                 Config->set_auditioner_output_right (connections[0]);
 245                         } else {
 246                                 Config->set_auditioner_output_right ("default");
 247                         }
 248                 } else {
 249                         Config->set_auditioner_output_right ("");
 250                 }
 251         }
 252 }
 253
 254 ChanCount
 255 Auditioner::input_streams () const
 256 {
 257         /* auditioner never has any inputs - its channel configuration
 258            depends solely on the region we are auditioning.
 259         */
 260
 261         if (audio_diskstream()) {
 262                 return audio_diskstream()->n_channels();
 263         }
 264
 265         return ChanCount ();
 266 }
 267
 268 MonitorState
 269 Auditioner::monitoring_state () const
 270 {
 271         return MonitoringDisk;
 272 }