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/export_channel.h>
23 #include <ardour/export_failed.h>
24 #include <ardour/audioengine.h>
26 using namespace ARDOUR;
29 PortExportChannel::operator< (ExportChannel const & other) const
31 PortExportChannel const * pec;
32 if (!(pec = dynamic_cast<PortExportChannel const *> (&other))) {
35 return ports < pec->ports;
39 PortExportChannel::read (Sample * data, nframes_t frames) const
41 memset (data, 0, frames * sizeof (float));
43 for (PortSet::const_iterator it = ports.begin(); it != ports.end(); ++it) {
45 Sample* port_buffer = (*it)->get_audio_buffer(frames, 0).data();
47 for (uint32_t i = 0; i < frames; ++i) {
48 data[i] += (float) port_buffer[i];
55 PortExportChannel::get_state (XMLNode * node) const
58 for (PortSet::const_iterator it = ports.begin(); it != ports.end(); ++it) {
59 if ((port_node = node->add_child ("Port"))) {
60 port_node->add_property ("name", (*it)->name());
66 PortExportChannel::set_state (XMLNode * node, Session & session)
69 XMLNodeList xml_ports = node->children ("Port");
70 for (XMLNodeList::iterator it = xml_ports.begin(); it != xml_ports.end(); ++it) {
71 if ((prop = (*it)->property ("name"))) {
72 ports.insert (dynamic_cast<AudioPort *> (session.engine().get_port_by_name (prop->value())));
77 RegionExportChannelFactory::RegionExportChannelFactory (Session * session, AudioRegion const & region, AudioTrack & track, Type type) :
81 frames_per_cycle (session->engine().frames_per_cycle ()),
82 buffers_up_to_date (false),
83 region_start (region.position()),
84 position (region_start),
91 n_channels = region.n_channels();
94 n_channels = region.n_channels();
96 mixdown_buffer = new Sample [frames_per_cycle];
97 gain_buffer = new Sample [frames_per_cycle];
98 memset (gain_buffer, 1.0, sizeof (Sample) * frames_per_cycle);
102 n_channels = track.n_outputs().n_audio();
105 throw ExportFailed ("Unhandled type in ExportChannelFactory constructor");
108 session->ProcessExport.connect (sigc::hide (sigc::mem_fun (*this, &RegionExportChannelFactory::new_cycle_started)));
110 buffers.set_count (ChanCount (DataType::AUDIO, n_channels));
111 buffers.ensure_buffers (DataType::AUDIO, n_channels, frames_per_cycle);
114 RegionExportChannelFactory::~RegionExportChannelFactory ()
116 if (mixdown_buffer) {
117 delete[] mixdown_buffer;
121 delete[] gain_buffer;
126 RegionExportChannelFactory::create (uint32_t channel)
128 assert (channel < n_channels);
129 return ExportChannelPtr (new RegionExportChannel (*this, channel));
133 RegionExportChannelFactory::read (uint32_t channel, Sample * data, nframes_t frames_to_read)
135 assert (channel < n_channels);
136 assert (frames_to_read <= frames_per_cycle);
138 if (!buffers_up_to_date) {
139 update_buffers(frames_to_read);
140 buffers_up_to_date = true;
143 memcpy (data, buffers.get_audio (channel).data(), frames_to_read * sizeof (Sample));
147 RegionExportChannelFactory::update_buffers (nframes_t frames)
149 assert (frames <= frames_per_cycle);
153 for (size_t channel = 0; channel < n_channels; ++channel) {
154 region.read (buffers.get_audio (channel).data(), position - region_start, frames, channel);
158 assert (mixdown_buffer && gain_buffer);
159 for (size_t channel = 0; channel < n_channels; ++channel) {
160 memset (mixdown_buffer, 0, sizeof (Sample) * frames);
161 region.read_at (buffers.get_audio (channel).data(), mixdown_buffer, gain_buffer, position, frames, channel);
165 track.export_stuff (buffers, position, frames);
168 throw ExportFailed ("Unhandled type in ExportChannelFactory::update_buffers");