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/panner.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::Hidden)
  44 {
  45         string left = _session.config.get_auditioner_output_left();
  46         string right = _session.config.get_auditioner_output_right();
  47
  48         if (left == "default") {
  49                 left = _session.engine().get_nth_physical_output (DataType::AUDIO, 0);
  50         }
  51
  52         if (right == "default") {
  53                 right = _session.engine().get_nth_physical_output (DataType::AUDIO, 1);
  54         }
  55
  56         if ((left.length() == 0) && (right.length() == 0)) {
  57                 warning << _("no outputs available for auditioner - manual connection required") << endmsg;
  58                 return;
  59         }
  60
  61         _main_outs->defer_pan_reset ();
  62
  63         if (left.length()) {
  64                 _output->add_port (left, this, DataType::AUDIO);
  65         }
  66
  67         if (right.length()) {
  68                 audio_diskstream()->add_channel (1);
  69                 _output->add_port (right, this, DataType::AUDIO);
  70         }
  71
  72         _main_outs->allow_pan_reset ();
  73         _main_outs->reset_panner ();
  74
  75         _output->changed.connect (mem_fun (*this, &Auditioner::output_changed));
  76
  77         the_region.reset ((AudioRegion*) 0);
  78         g_atomic_int_set (&_active, 0);
  79 }
  80
  81 Auditioner::~Auditioner ()
  82 {
  83 }
  84
  85 AudioPlaylist&
  86 Auditioner::prepare_playlist ()
  87 {
  88         // FIXME auditioner is still audio-only
  89         boost::shared_ptr<AudioPlaylist> apl = boost::dynamic_pointer_cast<AudioPlaylist>(_diskstream->playlist());
  90         assert(apl);
  91
  92         apl->clear ();
  93         return *apl;
  94 }
  95
  96 void
  97 Auditioner::audition_current_playlist ()
  98 {
  99         if (g_atomic_int_get (&_active)) {
 100                 /* don't go via session for this, because we are going
 101                    to remain active.
 102                 */
 103                 cancel_audition ();
 104         }
 105
 106         Glib::Mutex::Lock lm (lock);
 107         _diskstream->seek (0);
 108         length = _diskstream->playlist()->get_maximum_extent();
 109         current_frame = 0;
 110
 111         /* force a panner reset now that we have all channels */
 112
 113         _main_outs->panner()->reset (n_outputs().n_audio(), _diskstream->n_channels().n_audio());
 114
 115         g_atomic_int_set (&_active, 1);
 116 }
 117
 118 void
 119 Auditioner::audition_region (boost::shared_ptr<Region> region)
 120 {
 121         if (g_atomic_int_get (&_active)) {
 122                 /* don't go via session for this, because we are going
 123                    to remain active.
 124                 */
 125                 cancel_audition ();
 126         }
 127
 128         if (boost::dynamic_pointer_cast<AudioRegion>(region) == 0) {
 129                 error << _("Auditioning of non-audio regions not yet supported") << endmsg;
 130                 return;
 131         }
 132
 133         Glib::Mutex::Lock lm (lock);
 134
 135         /* copy it */
 136
 137         boost::shared_ptr<AudioRegion> the_region (boost::dynamic_pointer_cast<AudioRegion> (RegionFactory::create (region)));
 138         the_region->set_position (0, this);
 139
 140         _diskstream->playlist()->drop_regions ();
 141         _diskstream->playlist()->add_region (the_region, 0, 1);
 142
 143         if (_diskstream->n_channels().n_audio() < the_region->n_channels()) {
 144                 audio_diskstream()->add_channel (the_region->n_channels() - _diskstream->n_channels().n_audio());
 145         } else if (_diskstream->n_channels().n_audio() > the_region->n_channels()) {
 146                 audio_diskstream()->remove_channel (_diskstream->n_channels().n_audio() - the_region->n_channels());
 147         }
 148
 149         /* force a panner reset now that we have all channels */
 150
 151         _main_outs->reset_panner();
 152
 153         length = the_region->length();
 154
 155         int dir;
 156         nframes_t offset = the_region->sync_offset (dir);
 157
 158         /* can't audition from a negative sync point */
 159
 160         if (dir < 0) {
 161                 offset = 0;
 162         }
 163
 164         _diskstream->seek (offset);
 165         current_frame = offset;
 166
 167         g_atomic_int_set (&_active, 1);
 168 }
 169
 170 int
 171 Auditioner::play_audition (nframes_t nframes)
 172 {
 173         bool need_butler;
 174         nframes_t this_nframes;
 175         int ret;
 176
 177         if (g_atomic_int_get (&_active) == 0) {
 178                 silence (nframes);
 179                 return 0;
 180         }
 181
 182         this_nframes = min (nframes, length - current_frame);
 183
 184         _diskstream->prepare ();
 185
 186         if ((ret = roll (this_nframes, current_frame, current_frame + nframes, false, false, false)) != 0) {
 187                 silence (nframes);
 188                 return ret;
 189         }
 190
 191         need_butler = _diskstream->commit (this_nframes);
 192         current_frame += this_nframes;
 193
 194         if (current_frame >= length) {
 195                 _session.cancel_audition ();
 196                 return 0;
 197         } else {
 198                 return need_butler ? 1 : 0;
 199         }
 200 }
 201
 202 void
 203 Auditioner::output_changed (IOChange change, void* /*src*/)
 204 {
 205         string phys;
 206
 207         if (change & ConnectionsChanged) {
 208                 vector<string> connections;
 209                 if (_output->nth (0)->get_connections (connections)) {
 210                         phys = _session.engine().get_nth_physical_output (DataType::AUDIO, 0);
 211                         if (phys != connections[0]) {
 212                                 _session.config.set_auditioner_output_left (connections[0]);
 213                         } else {
 214                                 _session.config.set_auditioner_output_left ("default");
 215                         }
 216                 } else {
 217                         _session.config.set_auditioner_output_left ("");
 218                 }
 219
 220                 connections.clear ();
 221
 222                 if (_output->nth (1)->get_connections (connections)) {
 223                         phys = _session.engine().get_nth_physical_output (DataType::AUDIO, 1);
 224                         if (phys != connections[0]) {
 225                                 _session.config.set_auditioner_output_right (connections[0]);
 226                         } else {
 227                                 _session.config.set_auditioner_output_right ("default");
 228                         }
 229                 } else {
 230                         _session.config.set_auditioner_output_right ("");
 231                 }
 232         }
 233 }