libs/ardour/export_channel.cc

   1 /*
   2     Copyright (C) 2008 Paul Davis
   3     Author: Sakari Bergen
   4
   5     This program is free software; you can redistribute it and/or modify
   6     it under the terms of the GNU General Public License as published by
   7     the Free Software Foundation; either version 2 of the License, or
   8     (at your option) any later version.
   9
  10     This program is distributed in the hope that it will be useful,
  11     but WITHOUT ANY WARRANTY; without even the implied warranty of
  12     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13     GNU General Public License for more details.
  14
  15     You should have received a copy of the GNU General Public License
  16     along with this program; if not, write to the Free Software
  17     Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  18
  19 */
  20
  21 #include "ardour/audio_buffer.h"
  22 #include "ardour/audio_port.h"
  23 #include "ardour/audio_track.h"
  24 #include "ardour/audioengine.h"
  25 #include "ardour/audioregion.h"
  26 #include "ardour/capturing_processor.h"
  27 #include "ardour/export_channel.h"
  28 #include "ardour/export_failed.h"
  29 #include "ardour/session.h"
  30
  31 #include "pbd/error.h"
  32
  33 #include "i18n.h"
  34
  35 using namespace ARDOUR;
  36
  37 PortExportChannel::PortExportChannel ()
  38         : buffer_size(0)
  39 {
  40 }
  41
  42 void PortExportChannel::set_max_buffer_size(framecnt_t frames)
  43 {
  44         buffer_size = frames;
  45         buffer.reset (new Sample[frames]);
  46 }
  47
  48 bool
  49 PortExportChannel::operator< (ExportChannel const & other) const
  50 {
  51         PortExportChannel const * pec;
  52         if (!(pec = dynamic_cast<PortExportChannel const *> (&other))) {
  53                 return this < &other;
  54         }
  55         return ports < pec->ports;
  56 }
  57
  58 void
  59 PortExportChannel::read (Sample const *& data, framecnt_t frames) const
  60 {
  61         assert(buffer);
  62         assert(frames <= buffer_size);
  63
  64         if (ports.size() == 1) {
  65                 boost::shared_ptr<AudioPort> p = ports.begin()->lock ();
  66                 data = p->get_audio_buffer(frames).data();
  67                 return;
  68         }
  69
  70         memset (buffer.get(), 0, frames * sizeof (Sample));
  71
  72         for (PortSet::const_iterator it = ports.begin(); it != ports.end(); ++it) {
  73                 boost::shared_ptr<AudioPort> p = it->lock ();
  74                 if (p) {
  75                         Sample* port_buffer = p->get_audio_buffer(frames).data();
  76
  77                         for (uint32_t i = 0; i < frames; ++i) {
  78                                 buffer[i] += (float) port_buffer[i];
  79                         }
  80                 }
  81         }
  82
  83         data = buffer.get();
  84 }
  85
  86 void
  87 PortExportChannel::get_state (XMLNode * node) const
  88 {
  89         XMLNode * port_node;
  90         for (PortSet::const_iterator it = ports.begin(); it != ports.end(); ++it) {
  91                 boost::shared_ptr<Port> p = it->lock ();
  92                 if (p && (port_node = node->add_child ("Port"))) {
  93                         port_node->add_property ("name", p->name());
  94                 }
  95         }
  96 }
  97
  98 void
  99 PortExportChannel::set_state (XMLNode * node, Session & session)
 100 {
 101         XMLProperty * prop;
 102         XMLNodeList xml_ports = node->children ("Port");
 103         for (XMLNodeList::iterator it = xml_ports.begin(); it != xml_ports.end(); ++it) {
 104                 if ((prop = (*it)->property ("name"))) {
 105                         std::string const & name = prop->value();
 106                         boost::shared_ptr<AudioPort> port = boost::dynamic_pointer_cast<AudioPort> (session.engine().get_port_by_name (name));
 107                         if (port) {
 108                                 ports.insert (port);
 109                         } else {
 110                                 PBD::warning << string_compose (_("Could not get port for export channel \"%1\", dropping the channel"), name) << endmsg;
 111                         }
 112                 }
 113         }
 114 }
 115
 116 RegionExportChannelFactory::RegionExportChannelFactory (Session * session, AudioRegion const & region, AudioTrack & track, Type type)
 117         : region (region)
 118         , track (track)
 119         , type (type)
 120         , frames_per_cycle (session->engine().frames_per_cycle ())
 121         , buffers_up_to_date (false)
 122         , region_start (region.position())
 123         , position (region_start)
 124 {
 125         switch (type) {
 126           case Raw:
 127                 n_channels = region.n_channels();
 128                 break;
 129           case Fades:
 130                 n_channels = region.n_channels();
 131
 132                 mixdown_buffer.reset (new Sample [frames_per_cycle]);
 133                 gain_buffer.reset (new Sample [frames_per_cycle]);
 134                 memset (gain_buffer.get(), 1.0, sizeof (Sample) * frames_per_cycle);
 135
 136                 break;
 137           case Processed:
 138                 n_channels = track.n_outputs().n_audio();
 139                 break;
 140           default:
 141                 throw ExportFailed ("Unhandled type in ExportChannelFactory constructor");
 142         }
 143
 144         session->ProcessExport.connect_same_thread (export_connection, boost::bind (&RegionExportChannelFactory::new_cycle_started, this, _1));
 145
 146         buffers.ensure_buffers (DataType::AUDIO, n_channels, frames_per_cycle);
 147         buffers.set_count (ChanCount (DataType::AUDIO, n_channels));
 148 }
 149
 150 RegionExportChannelFactory::~RegionExportChannelFactory ()
 151 {
 152 }
 153
 154 ExportChannelPtr
 155 RegionExportChannelFactory::create (uint32_t channel)
 156 {
 157         assert (channel < n_channels);
 158         return ExportChannelPtr (new RegionExportChannel (*this, channel));
 159 }
 160
 161 void
 162 RegionExportChannelFactory::read (uint32_t channel, Sample const *& data, framecnt_t frames_to_read)
 163 {
 164         assert (channel < n_channels);
 165         assert (frames_to_read <= frames_per_cycle);
 166
 167         if (!buffers_up_to_date) {
 168                 update_buffers(frames_to_read);
 169                 buffers_up_to_date = true;
 170         }
 171
 172         data = buffers.get_audio (channel).data();
 173 }
 174
 175 void
 176 RegionExportChannelFactory::update_buffers (framecnt_t frames)
 177 {
 178         assert (frames <= frames_per_cycle);
 179
 180         switch (type) {
 181           case Raw:
 182                 for (size_t channel = 0; channel < n_channels; ++channel) {
 183                         region.read (buffers.get_audio (channel).data(), position - region_start, frames, channel);
 184                 }
 185                 break;
 186           case Fades:
 187                 assert (mixdown_buffer && gain_buffer);
 188                 for (size_t channel = 0; channel < n_channels; ++channel) {
 189                         memset (mixdown_buffer.get(), 0, sizeof (Sample) * frames);
 190                         region.read_at (buffers.get_audio (channel).data(), mixdown_buffer.get(), gain_buffer.get(), position, frames, channel);
 191                 }
 192                 break;
 193         case Processed:
 194                 track.export_stuff (buffers, position, frames, track.main_outs(), true, true);
 195                 break;
 196         default:
 197                 throw ExportFailed ("Unhandled type in ExportChannelFactory::update_buffers");
 198         }
 199
 200         position += frames;
 201 }
 202
 203
 204 RouteExportChannel::RouteExportChannel(boost::shared_ptr<CapturingProcessor> processor, size_t channel,
 205                                        boost::shared_ptr<ProcessorRemover> remover)
 206   : processor (processor)
 207   , channel (channel)
 208   , remover (remover)
 209 {
 210 }
 211
 212 RouteExportChannel::~RouteExportChannel()
 213 {
 214 }
 215
 216 void
 217 RouteExportChannel::create_from_route(std::list<ExportChannelPtr> & result, Route & route)
 218 {
 219         boost::shared_ptr<CapturingProcessor> processor = route.add_export_point();
 220         uint32_t channels = processor->input_streams().n_audio();
 221
 222         boost::shared_ptr<ProcessorRemover> remover (new ProcessorRemover (route, processor));
 223         result.clear();
 224         for (uint32_t i = 0; i < channels; ++i) {
 225                 result.push_back (ExportChannelPtr (new RouteExportChannel (processor, i, remover)));
 226         }
 227 }
 228
 229 void
 230 RouteExportChannel::set_max_buffer_size(framecnt_t frames)
 231 {
 232         if (processor) {
 233                 processor->set_block_size (frames);
 234         }
 235 }
 236
 237 void
 238 RouteExportChannel::read (Sample const *& data, framecnt_t frames) const
 239 {
 240         assert(processor);
 241         AudioBuffer const & buffer = processor->get_capture_buffers().get_audio (channel);
 242         assert (frames <= (framecnt_t) buffer.size());
 243         data = buffer.data();
 244 }
 245
 246 void
 247 RouteExportChannel::get_state (XMLNode *) const
 248 {
 249         // TODO
 250 }
 251
 252 void
 253 RouteExportChannel::set_state (XMLNode *, Session &)
 254 {
 255         // TODO
 256 }
 257
 258 bool
 259 RouteExportChannel::operator< (ExportChannel const & other) const
 260 {
 261         RouteExportChannel const * rec;
 262         if ((rec = dynamic_cast<RouteExportChannel const *>(&other)) == 0) {
 263                 return this < &other;
 264         }
 265
 266         if (processor.get() == rec->processor.get()) {
 267                 return channel < rec->channel;
 268         }
 269         return processor.get() < rec->processor.get();
 270 }
 271
 272 RouteExportChannel::ProcessorRemover::~ProcessorRemover()
 273 {
 274         route.remove_processor (processor);
 275 }