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_current_playlist ()
 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         Glib::Mutex::Lock lm (lock);
 137         _diskstream->seek (0);
 138         length = _diskstream->playlist()->get_extent().second;
 139         current_frame = 0;
 140
 141         /* force a panner reset now that we have all channels */
 142
 143         _main_outs->panner_shell()->configure_io (ChanCount (DataType::AUDIO, _diskstream->n_channels().n_audio()),
 144                                                   ChanCount (DataType::AUDIO, n_outputs().n_audio()));
 145
 146         g_atomic_int_set (&_auditioning, 1);
 147 }
 148
 149 void
 150 Auditioner::audition_region (boost::shared_ptr<Region> region)
 151 {
 152         if (g_atomic_int_get (&_auditioning)) {
 153                 /* don't go via session for this, because we are going
 154                    to remain active.
 155                 */
 156                 cancel_audition ();
 157         }
 158
 159         if (boost::dynamic_pointer_cast<AudioRegion>(region) == 0) {
 160                 error << _("Auditioning of non-audio regions not yet supported") << endmsg;
 161                 return;
 162         }
 163
 164         Glib::Mutex::Lock lm (lock);
 165
 166         /* copy it */
 167
 168         boost::shared_ptr<AudioRegion> the_region (boost::dynamic_pointer_cast<AudioRegion> (RegionFactory::create (region)));
 169         the_region->set_position (0);
 170
 171         _diskstream->playlist()->drop_regions ();
 172         _diskstream->playlist()->add_region (the_region, 0, 1);
 173
 174         if (_diskstream->n_channels().n_audio() < the_region->n_channels()) {
 175                 audio_diskstream()->add_channel (the_region->n_channels() - _diskstream->n_channels().n_audio());
 176         } else if (_diskstream->n_channels().n_audio() > the_region->n_channels()) {
 177                 audio_diskstream()->remove_channel (_diskstream->n_channels().n_audio() - the_region->n_channels());
 178         }
 179
 180         ProcessorStreams ps;
 181         {
 182                 Glib::Mutex::Lock lm (AudioEngine::instance()->process_lock ());
 183
 184                 if (configure_processors (&ps)) {
 185                         error << string_compose (_("Cannot setup auditioner processing flow for %1 channels"),
 186                                                  _diskstream->n_channels()) << endmsg;
 187                         return;
 188                 }
 189         }
 190
 191         /* force a panner reset now that we have all channels */
 192
 193         _main_outs->reset_panner();
 194
 195         length = the_region->length();
 196
 197         int dir;
 198         framecnt_t offset = the_region->sync_offset (dir);
 199
 200         /* can't audition from a negative sync point */
 201
 202         if (dir < 0) {
 203                 offset = 0;
 204         }
 205
 206         _diskstream->seek (offset);
 207         current_frame = offset;
 208
 209         g_atomic_int_set (&_auditioning, 1);
 210 }
 211
 212 int
 213 Auditioner::play_audition (framecnt_t nframes)
 214 {
 215         bool need_butler = false;
 216         framecnt_t this_nframes;
 217         int ret;
 218
 219         if (g_atomic_int_get (&_auditioning) == 0) {
 220                 silence (nframes);
 221                 return 0;
 222         }
 223
 224         this_nframes = min (nframes, length - current_frame);
 225
 226         if ((ret = roll (this_nframes, current_frame, current_frame + nframes, false, need_butler)) != 0) {
 227                 silence (nframes);
 228                 return ret;
 229         }
 230
 231         current_frame += this_nframes;
 232
 233         if (current_frame >= length) {
 234                 _session.cancel_audition ();
 235                 return 0;
 236         } else {
 237                 return need_butler ? 1 : 0;
 238         }
 239 }
 240
 241 void
 242 Auditioner::output_changed (IOChange change, void* /*src*/)
 243 {
 244         if (change.type & IOChange::ConnectionsChanged) {
 245                 string phys;
 246                 vector<string> connections;
 247                 vector<string> outputs;
 248                 _session.engine().get_physical_outputs (DataType::AUDIO, outputs);
 249                 if (_output->nth (0)->get_connections (connections)) {
 250                         if (outputs.size() > 0) {
 251                                 phys = outputs[0];
 252                         }
 253                         if (phys != connections[0]) {
 254                                 _session.config.set_auditioner_output_left (connections[0]);
 255                         } else {
 256                                 _session.config.set_auditioner_output_left ("default");
 257                         }
 258                 } else {
 259                         _session.config.set_auditioner_output_left ("");
 260                 }
 261
 262                 connections.clear ();
 263
 264                 if (_output->nth (1)->get_connections (connections)) {
 265                         if (outputs.size() > 1) {
 266                                 phys = outputs[1];
 267                         }
 268                         if (phys != connections[0]) {
 269                                 _session.config.set_auditioner_output_right (connections[0]);
 270                         } else {
 271                                 _session.config.set_auditioner_output_right ("default");
 272                         }
 273                 } else {
 274                         _session.config.set_auditioner_output_right ("");
 275                 }
 276         }
 277 }
 278
 279 ChanCount
 280 Auditioner::input_streams () const
 281 {
 282         /* auditioner never has any inputs - its channel configuration
 283            depends solely on the region we are auditioning.
 284         */
 285
 286         if (audio_diskstream()) {
 287                 return audio_diskstream()->n_channels();
 288         }
 289
 290         return ChanCount ();
 291 }
 292
 293 MonitorState
 294 Auditioner::monitoring_state () const
 295 {
 296         return MonitoringDisk;
 297 }