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         vector<string> outputs;
  63         _session.engine().get_physical_outputs (DataType::AUDIO, outputs);
  64
  65         if (left == "default") {
  66                 if (_session.monitor_out()) {
  67                         left = _session.monitor_out()->input()->audio (0)->name();
  68                         via_monitor = true;
  69                 } else {
  70                         if (outputs.size() > 0) {
  71                                 left = outputs[0];
  72                         }
  73                 }
  74         }
  75
  76         if (right == "default") {
  77                 if (_session.monitor_out()) {
  78                         right = _session.monitor_out()->input()->audio (1)->name();
  79                         via_monitor = true;
  80                 } else {
  81                         if (outputs.size() > 1) {
  82                                 right = outputs[1];
  83                         }
  84                 }
  85         }
  86
  87         if ((left.length() == 0) && (right.length() == 0)) {
  88                 warning << _("no outputs available for auditioner - manual connection required") << endmsg;
  89                 return -1;
  90         }
  91
  92         _main_outs->defer_pan_reset ();
  93
  94         if (left.length()) {
  95                 _output->add_port (left, this, DataType::AUDIO);
  96         }
  97
  98         if (right.length()) {
  99                 _output->add_port (right, this, DataType::AUDIO);
 100         }
 101
 102         _main_outs->allow_pan_reset ();
 103         _main_outs->reset_panner ();
 104
 105         _output->changed.connect_same_thread (*this, boost::bind (&Auditioner::output_changed, this, _1, _2));
 106
 107         return 0;
 108 }
 109
 110 Auditioner::~Auditioner ()
 111 {
 112 }
 113
 114 AudioPlaylist&
 115 Auditioner::prepare_playlist ()
 116 {
 117         // FIXME auditioner is still audio-only
 118         boost::shared_ptr<AudioPlaylist> apl = boost::dynamic_pointer_cast<AudioPlaylist>(_diskstream->playlist());
 119         assert(apl);
 120
 121         apl->clear ();
 122         return *apl;
 123 }
 124
 125 void
 126 Auditioner::audition_current_playlist ()
 127 {
 128         if (g_atomic_int_get (&_auditioning)) {
 129                 /* don't go via session for this, because we are going
 130                    to remain active.
 131                 */
 132                 cancel_audition ();
 133         }
 134
 135         Glib::Mutex::Lock lm (lock);
 136         _diskstream->seek (0);
 137         length = _diskstream->playlist()->get_extent().second;
 138         current_frame = 0;
 139
 140         /* force a panner reset now that we have all channels */
 141
 142         _main_outs->panner()->reset (n_outputs().n_audio(), _diskstream->n_channels().n_audio());
 143
 144         g_atomic_int_set (&_auditioning, 1);
 145 }
 146
 147 void
 148 Auditioner::audition_region (boost::shared_ptr<Region> region)
 149 {
 150         if (g_atomic_int_get (&_auditioning)) {
 151                 /* don't go via session for this, because we are going
 152                    to remain active.
 153                 */
 154                 cancel_audition ();
 155         }
 156
 157         if (boost::dynamic_pointer_cast<AudioRegion>(region) == 0) {
 158                 error << _("Auditioning of non-audio regions not yet supported") << endmsg;
 159                 return;
 160         }
 161
 162         Glib::Mutex::Lock lm (lock);
 163
 164         /* copy it */
 165
 166         boost::shared_ptr<AudioRegion> the_region (boost::dynamic_pointer_cast<AudioRegion> (RegionFactory::create (region)));
 167         the_region->set_position (0, this);
 168
 169         _diskstream->playlist()->drop_regions ();
 170         _diskstream->playlist()->add_region (the_region, 0, 1);
 171
 172         if (_diskstream->n_channels().n_audio() < the_region->n_channels()) {
 173                 audio_diskstream()->add_channel (the_region->n_channels() - _diskstream->n_channels().n_audio());
 174         } else if (_diskstream->n_channels().n_audio() > the_region->n_channels()) {
 175                 audio_diskstream()->remove_channel (_diskstream->n_channels().n_audio() - the_region->n_channels());
 176         }
 177
 178         ProcessorStreams ps;
 179         if (configure_processors (&ps)) {
 180                 error << string_compose (_("Cannot setup auditioner processing flow for %1 channels"),
 181                                          _diskstream->n_channels()) << endmsg;
 182                 return;
 183         }
 184
 185         /* force a panner reset now that we have all channels */
 186
 187         _main_outs->reset_panner();
 188
 189         length = the_region->length();
 190
 191         int dir;
 192         nframes_t offset = the_region->sync_offset (dir);
 193
 194         /* can't audition from a negative sync point */
 195
 196         if (dir < 0) {
 197                 offset = 0;
 198         }
 199
 200         _diskstream->seek (offset);
 201         current_frame = offset;
 202
 203         g_atomic_int_set (&_auditioning, 1);
 204 }
 205
 206 int
 207 Auditioner::play_audition (nframes_t nframes)
 208 {
 209         bool need_butler = false;
 210         nframes_t this_nframes;
 211         int ret;
 212
 213         if (g_atomic_int_get (&_auditioning) == 0) {
 214                 silence (nframes);
 215                 return 0;
 216         }
 217
 218         this_nframes = min (nframes, length - current_frame);
 219
 220         if ((ret = roll (this_nframes, current_frame, current_frame + nframes, false, false, false, need_butler)) != 0) {
 221                 silence (nframes);
 222                 return ret;
 223         }
 224
 225         current_frame += this_nframes;
 226
 227         if (current_frame >= length) {
 228                 _session.cancel_audition ();
 229                 return 0;
 230         } else {
 231                 return need_butler ? 1 : 0;
 232         }
 233 }
 234
 235 void
 236 Auditioner::output_changed (IOChange change, void* /*src*/)
 237 {
 238         if (change.type & IOChange::ConnectionsChanged) {
 239                 string phys;
 240                 vector<string> connections;
 241                 vector<string> outputs;
 242                 _session.engine().get_physical_outputs (DataType::AUDIO, outputs);
 243                 if (_output->nth (0)->get_connections (connections)) {
 244                         if (outputs.size() > 0) {
 245                                 phys = outputs[0];
 246                         }
 247                         if (phys != connections[0]) {
 248                                 _session.config.set_auditioner_output_left (connections[0]);
 249                         } else {
 250                                 _session.config.set_auditioner_output_left ("default");
 251                         }
 252                 } else {
 253                         _session.config.set_auditioner_output_left ("");
 254                 }
 255
 256                 connections.clear ();
 257
 258                 if (_output->nth (1)->get_connections (connections)) {
 259                         if (outputs.size() > 1) {
 260                                 phys = outputs[1];
 261                         }
 262                         if (phys != connections[0]) {
 263                                 _session.config.set_auditioner_output_right (connections[0]);
 264                         } else {
 265                                 _session.config.set_auditioner_output_right ("default");
 266                         }
 267                 } else {
 268                         _session.config.set_auditioner_output_right ("");
 269                 }
 270         }
 271 }