2 Copyright (C) 2008 Paul Davis
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.
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.
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.
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/export_channel.h"
26 #include "ardour/export_failed.h"
27 #include "ardour/session.h"
29 #include "pbd/error.h"
31 using namespace ARDOUR;
34 PortExportChannel::operator< (ExportChannel const & other) const
36 PortExportChannel const * pec;
37 if (!(pec = dynamic_cast<PortExportChannel const *> (&other))) {
40 return ports < pec->ports;
44 PortExportChannel::read (Sample * data, framecnt_t frames) const
46 memset (data, 0, frames * sizeof (float));
48 for (PortSet::const_iterator it = ports.begin(); it != ports.end(); ++it) {
50 Sample* port_buffer = (*it)->get_audio_buffer(frames).data();
52 for (uint32_t i = 0; i < frames; ++i) {
53 data[i] += (float) port_buffer[i];
60 PortExportChannel::get_state (XMLNode * node) const
63 for (PortSet::const_iterator it = ports.begin(); it != ports.end(); ++it) {
64 if ((port_node = node->add_child ("Port"))) {
65 port_node->add_property ("name", (*it)->name());
71 PortExportChannel::set_state (XMLNode * node, Session & session)
74 XMLNodeList xml_ports = node->children ("Port");
75 for (XMLNodeList::iterator it = xml_ports.begin(); it != xml_ports.end(); ++it) {
76 if ((prop = (*it)->property ("name"))) {
77 std::string const & name = prop->value();
78 AudioPort * port = dynamic_cast<AudioPort *> (session.engine().get_port_by_name (name));
82 PBD::warning << string_compose (_("Could not get port for export channel \"%1\", dropping the channel"), name) << endmsg;
88 RegionExportChannelFactory::RegionExportChannelFactory (Session * session, AudioRegion const & region, AudioTrack & track, Type type) :
92 frames_per_cycle (session->engine().frames_per_cycle ()),
93 buffers_up_to_date (false),
94 region_start (region.position()),
95 position (region_start),
102 n_channels = region.n_channels();
105 n_channels = region.n_channels();
107 mixdown_buffer = new Sample [frames_per_cycle];
108 gain_buffer = new Sample [frames_per_cycle];
109 memset (gain_buffer, 1.0, sizeof (Sample) * frames_per_cycle);
113 n_channels = track.n_outputs().n_audio();
116 throw ExportFailed ("Unhandled type in ExportChannelFactory constructor");
119 session->ProcessExport.connect_same_thread (export_connection, boost::bind (&RegionExportChannelFactory::new_cycle_started, this, _1));
121 buffers.ensure_buffers (DataType::AUDIO, n_channels, frames_per_cycle);
122 buffers.set_count (ChanCount (DataType::AUDIO, n_channels));
125 RegionExportChannelFactory::~RegionExportChannelFactory ()
127 delete[] mixdown_buffer;
128 delete[] gain_buffer;
132 RegionExportChannelFactory::create (uint32_t channel)
134 assert (channel < n_channels);
135 return ExportChannelPtr (new RegionExportChannel (*this, channel));
139 RegionExportChannelFactory::read (uint32_t channel, Sample * data, framecnt_t frames_to_read)
141 assert (channel < n_channels);
142 assert (frames_to_read <= frames_per_cycle);
144 if (!buffers_up_to_date) {
145 update_buffers(frames_to_read);
146 buffers_up_to_date = true;
149 memcpy (data, buffers.get_audio (channel).data(), frames_to_read * sizeof (Sample));
153 RegionExportChannelFactory::update_buffers (framecnt_t frames)
155 assert (frames <= frames_per_cycle);
159 for (size_t channel = 0; channel < n_channels; ++channel) {
160 region.read (buffers.get_audio (channel).data(), position - region_start, frames, channel);
164 assert (mixdown_buffer && gain_buffer);
165 for (size_t channel = 0; channel < n_channels; ++channel) {
166 memset (mixdown_buffer, 0, sizeof (Sample) * frames);
167 region.read_at (buffers.get_audio (channel).data(), mixdown_buffer, gain_buffer, position, frames, channel);
171 track.export_stuff (buffers, position, frames);
174 throw ExportFailed ("Unhandled type in ExportChannelFactory::update_buffers");