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