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/audioregion.h"
26 #include "ardour/export_channel.h"
27 #include "ardour/export_failed.h"
28 #include "ardour/session.h"
30 #include "pbd/error.h"
32 using namespace ARDOUR;
35 PortExportChannel::operator< (ExportChannel const & other) const
37 PortExportChannel const * pec;
38 if (!(pec = dynamic_cast<PortExportChannel const *> (&other))) {
41 return ports < pec->ports;
45 PortExportChannel::read (Sample * data, framecnt_t frames) const
47 memset (data, 0, frames * sizeof (float));
49 for (PortSet::const_iterator it = ports.begin(); it != ports.end(); ++it) {
51 Sample* port_buffer = (*it)->get_audio_buffer(frames).data();
53 for (uint32_t i = 0; i < frames; ++i) {
54 data[i] += (float) port_buffer[i];
61 PortExportChannel::get_state (XMLNode * node) const
64 for (PortSet::const_iterator it = ports.begin(); it != ports.end(); ++it) {
65 if ((port_node = node->add_child ("Port"))) {
66 port_node->add_property ("name", (*it)->name());
72 PortExportChannel::set_state (XMLNode * node, Session & session)
75 XMLNodeList xml_ports = node->children ("Port");
76 for (XMLNodeList::iterator it = xml_ports.begin(); it != xml_ports.end(); ++it) {
77 if ((prop = (*it)->property ("name"))) {
78 std::string const & name = prop->value();
79 AudioPort * port = dynamic_cast<AudioPort *> (session.engine().get_port_by_name (name));
83 PBD::warning << string_compose (_("Could not get port for export channel \"%1\", dropping the channel"), name) << endmsg;
89 RegionExportChannelFactory::RegionExportChannelFactory (Session * session, AudioRegion const & region, AudioTrack & track, Type type) :
93 frames_per_cycle (session->engine().frames_per_cycle ()),
94 buffers_up_to_date (false),
95 region_start (region.position()),
96 position (region_start),
103 n_channels = region.n_channels();
106 n_channels = region.n_channels();
108 mixdown_buffer = new Sample [frames_per_cycle];
109 gain_buffer = new Sample [frames_per_cycle];
110 memset (gain_buffer, 1.0, sizeof (Sample) * frames_per_cycle);
114 n_channels = track.n_outputs().n_audio();
117 throw ExportFailed ("Unhandled type in ExportChannelFactory constructor");
120 session->ProcessExport.connect_same_thread (export_connection, boost::bind (&RegionExportChannelFactory::new_cycle_started, this, _1));
122 buffers.ensure_buffers (DataType::AUDIO, n_channels, frames_per_cycle);
123 buffers.set_count (ChanCount (DataType::AUDIO, n_channels));
126 RegionExportChannelFactory::~RegionExportChannelFactory ()
128 delete[] mixdown_buffer;
129 delete[] gain_buffer;
133 RegionExportChannelFactory::create (uint32_t channel)
135 assert (channel < n_channels);
136 return ExportChannelPtr (new RegionExportChannel (*this, channel));
140 RegionExportChannelFactory::read (uint32_t channel, Sample * data, framecnt_t frames_to_read)
142 assert (channel < n_channels);
143 assert (frames_to_read <= frames_per_cycle);
145 if (!buffers_up_to_date) {
146 update_buffers(frames_to_read);
147 buffers_up_to_date = true;
150 memcpy (data, buffers.get_audio (channel).data(), frames_to_read * sizeof (Sample));
154 RegionExportChannelFactory::update_buffers (framecnt_t frames)
156 assert (frames <= frames_per_cycle);
160 for (size_t channel = 0; channel < n_channels; ++channel) {
161 region.read (buffers.get_audio (channel).data(), position - region_start, frames, channel);
165 assert (mixdown_buffer && gain_buffer);
166 for (size_t channel = 0; channel < n_channels; ++channel) {
167 memset (mixdown_buffer, 0, sizeof (Sample) * frames);
168 region.read_at (buffers.get_audio (channel).data(), mixdown_buffer, gain_buffer, position, frames, channel);
172 track.export_stuff (buffers, position, frames);
175 throw ExportFailed ("Unhandled type in ExportChannelFactory::update_buffers");