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_output (DataType::AUDIO, 0);
  49         }
  50
  51         if (right == "default") {
  52                 right = _session.engine().get_nth_physical_output (DataType::AUDIO, 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         reset_panner ();
  74
  75         IO::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         _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()->clear ();
 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         reset_panner();
 152
 153         length = the_region->length();
 154         _diskstream->seek (0);
 155         current_frame = 0;
 156         g_atomic_int_set (&_active, 1);
 157 }
 158
 159 int
 160 Auditioner::play_audition (nframes_t nframes)
 161 {
 162         bool need_butler;
 163         nframes_t this_nframes;
 164         int ret;
 165
 166         if (g_atomic_int_get (&_active) == 0) {
 167                 silence (nframes, 0);
 168                 return 0;
 169         }
 170
 171         this_nframes = min (nframes, length - current_frame);
 172
 173         _diskstream->prepare ();
 174
 175         if ((ret = roll (this_nframes, current_frame, current_frame + nframes, 0, false, false, false)) != 0) {
 176                 silence (nframes, 0);
 177                 return ret;
 178         }
 179
 180         need_butler = _diskstream->commit (this_nframes);
 181         current_frame += this_nframes;
 182
 183         if (current_frame >= length) {
 184                 _session.cancel_audition ();
 185                 return 0;
 186         } else {
 187                 return need_butler ? 1 : 0;
 188         }
 189 }
 190
 191 void
 192 Auditioner::output_changed (IOChange change, void* src)
 193 {
 194         string phys;
 195
 196         if (change & ConnectionsChanged) {
 197                 const char ** connections;
 198                 connections =  output (0)->get_connections ();
 199                 if (connections) {
 200                         phys = _session.engine().get_nth_physical_output (DataType::AUDIO, 0);
 201                         if (phys != connections[0]) {
 202                                 Config->set_auditioner_output_left (connections[0]);
 203                         } else {
 204                                 Config->set_auditioner_output_left ("default");
 205                         }
 206                         free (connections);
 207                 } else {
 208                         Config->set_auditioner_output_left ("");
 209                 }
 210
 211                 connections = output (1)->get_connections ();
 212                 if (connections) {
 213                         phys = _session.engine().get_nth_physical_output (DataType::AUDIO, 1);
 214                         if (phys != connections[0]) {
 215                                 Config->set_auditioner_output_right (connections[0]);
 216                         } else {
 217                                 Config->set_auditioner_output_right ("default");
 218                         }
 219                         free (connections);
 220                 } else {
 221                         Config->set_auditioner_output_right ("");
 222                 }
 223         }
 224 }