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/route.h>
  28 #include <ardour/session.h>
  29 #include <ardour/auditioner.h>
  30 #include <ardour/audioplaylist.h>
  31 #include <ardour/panner.h>
  32 #include <ardour/data_type.h>
  33 #include <ardour/region_factory.h>
  34
  35 using namespace std;
  36 using namespace ARDOUR;
  37 using namespace PBD;
  38
  39 #include "i18n.h"
  40
  41 Auditioner::Auditioner (Session& s)
  42         : AudioTrack (s, "auditioner", Route::Hidden)
  43 {
  44         string left = Config->get_auditioner_output_left();
  45         string right = Config->get_auditioner_output_right();
  46
  47         if (left == "default") {
  48                 left = _session.engine().get_nth_physical_audio_output (0);
  49         }
  50
  51         if (right == "default") {
  52                 right = _session.engine().get_nth_physical_audio_output (1);
  53         }
  54
  55         if ((left.length() == 0) && (right.length() == 0)) {
  56                 warning << _("no outputs available for auditioner - manual connection required") << endmsg;
  57                 return;
  58         }
  59
  60         defer_pan_reset ();
  61
  62         if (left.length()) {
  63                 add_output_port (left, this, DataType::AUDIO);
  64         }
  65
  66         if (right.length()) {
  67                 audio_diskstream()->add_channel (1);
  68                 add_output_port (right, this, DataType::AUDIO);
  69         }
  70
  71         allow_pan_reset ();
  72
  73         IO::output_changed.connect (mem_fun (*this, &Auditioner::output_changed));
  74
  75         the_region.reset ((AudioRegion*) 0);
  76         g_atomic_int_set (&_active, 0);
  77 }
  78
  79 Auditioner::~Auditioner ()
  80 {
  81 }
  82
  83 AudioPlaylist&
  84 Auditioner::prepare_playlist ()
  85 {
  86         // FIXME auditioner is still audio-only
  87         boost::shared_ptr<AudioPlaylist> apl = boost::dynamic_pointer_cast<AudioPlaylist>(_diskstream->playlist());
  88         assert(apl);
  89
  90         apl->clear ();
  91         return *apl;
  92 }
  93
  94 void
  95 Auditioner::audition_current_playlist ()
  96 {
  97         if (g_atomic_int_get (&_active)) {
  98                 /* don't go via session for this, because we are going
  99                    to remain active.
 100                 */
 101                 cancel_audition ();
 102         }
 103
 104         Glib::Mutex::Lock lm (lock);
 105         _diskstream->seek (0);
 106         length = _diskstream->playlist()->get_maximum_extent();
 107         current_frame = 0;
 108
 109         /* force a panner reset now that we have all channels */
 110
 111         _panner->reset (n_outputs(), _diskstream->n_channels());
 112
 113         g_atomic_int_set (&_active, 1);
 114 }
 115
 116 void
 117 Auditioner::audition_region (boost::shared_ptr<Region> region)
 118 {
 119         if (g_atomic_int_get (&_active)) {
 120                 /* don't go via session for this, because we are going
 121                    to remain active.
 122                 */
 123                 cancel_audition ();
 124         }
 125
 126         if (boost::dynamic_pointer_cast<AudioRegion>(region) == 0) {
 127                 error << _("Auditioning of non-audio regions not yet supported") << endmsg;
 128                 return;
 129         }
 130
 131         Glib::Mutex::Lock lm (lock);
 132
 133         /* copy it */
 134
 135         boost::shared_ptr<AudioRegion> the_region (boost::dynamic_pointer_cast<AudioRegion> (RegionFactory::create (region)));
 136         the_region->set_position (0, this);
 137
 138         _diskstream->playlist()->drop_regions ();
 139         _diskstream->playlist()->add_region (the_region, 0, 1);
 140
 141         if (_diskstream->n_channels() < the_region->n_channels()) {
 142                 audio_diskstream()->add_channel (the_region->n_channels() - _diskstream->n_channels());
 143         } else if (_diskstream->n_channels() > the_region->n_channels()) {
 144                 audio_diskstream()->remove_channel (_diskstream->n_channels() - the_region->n_channels());
 145         }
 146
 147         /* force a panner reset now that we have all channels */
 148
 149         _panner->reset (n_outputs(), _diskstream->n_channels());
 150
 151         length = the_region->length();
 152
 153         int dir;
 154         nframes_t offset = the_region->sync_offset (dir);
 155
 156         /* can't audition from a negative sync point */
 157
 158         if (dir < 0) {
 159                 offset = 0;
 160         }
 161
 162         _diskstream->seek (offset);
 163         current_frame = offset;
 164
 165         g_atomic_int_set (&_active, 1);
 166 }
 167
 168 int
 169 Auditioner::play_audition (nframes_t nframes)
 170 {
 171         bool need_butler;
 172         nframes_t this_nframes;
 173         int ret;
 174
 175         if (g_atomic_int_get (&_active) == 0) {
 176                 silence (nframes);
 177                 return 0;
 178         }
 179
 180         this_nframes = min (nframes, length - current_frame);
 181
 182         _diskstream->prepare ();
 183
 184         if ((ret = roll (this_nframes, current_frame, current_frame + nframes, false, false, false)) != 0) {
 185                 silence (nframes);
 186                 return ret;
 187         }
 188
 189         need_butler = _diskstream->commit (this_nframes);
 190
 191         current_frame += this_nframes;
 192
 193         if (current_frame >= length) {
 194                 _session.cancel_audition ();
 195                 return 0;
 196         } else {
 197                 return need_butler ? 1 : 0;
 198         }
 199 }
 200
 201 void
 202 Auditioner::output_changed (IOChange change, void* src)
 203 {
 204         string phys;
 205
 206         if (change & ConnectionsChanged) {
 207                 const char ** connections;
 208                 connections =  output (0)->get_connections ();
 209                 if (connections) {
 210                         phys = _session.engine().get_nth_physical_audio_output (0);
 211                         if (phys != connections[0]) {
 212                                 Config->set_auditioner_output_left (connections[0]);
 213                         } else {
 214                                 Config->set_auditioner_output_left ("default");
 215                         }
 216                         free (connections);
 217                 } else {
 218                         Config->set_auditioner_output_left ("");
 219                 }
 220
 221                 connections = output (1)->get_connections ();
 222                 if (connections) {
 223                         phys = _session.engine().get_nth_physical_audio_output (1);
 224                         if (phys != connections[0]) {
 225                                 Config->set_auditioner_output_right (connections[0]);
 226                         } else {
 227                                 Config->set_auditioner_output_right ("default");
 228                         }
 229                         free (connections);
 230                 } else {
 231                         Config->set_auditioner_output_right ("");
 232                 }
 233         }
 234 }