996 lines
21 KiB
C++
996 lines
21 KiB
C++
/*
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* Copyright (C) 2021 Robin Gareus <robin@gareus.org>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#include <math.h>
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#include <regex.h>
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#include <stdlib.h>
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#include <sys/mman.h>
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#include <sys/time.h>
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#include <sys/types.h>
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#include <unistd.h>
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#include <glibmm.h>
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#include "pbd/compose.h"
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#include "pbd/error.h"
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#include "pbd/file_utils.h"
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#include "pbd/pthread_utils.h"
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#include "ardour/port_manager.h"
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#include "ndi_backend.h"
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#include "pbd/i18n.h"
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using namespace ARDOUR;
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static std::string s_instance_name;
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const size_t NDIBackend::_max_buffer_size = 8192;
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#define N_CHANNELS (2)
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NDIBackend::NDIBackend (AudioEngine& e, AudioBackendInfo& info)
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: AudioBackend (e, info)
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, PortEngineSharedImpl (e, s_instance_name)
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, _run (false)
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, _active (false)
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, _freewheel (false)
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, _freewheeling (false)
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, _last_process_start (0)
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, _samplerate (48000)
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, _samples_per_period (1024)
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, _systemic_audio_input_latency (0)
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, _systemic_audio_output_latency (0)
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, _dsp_load (0)
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, _processed_samples (0)
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{
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_instance_name = s_instance_name;
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}
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NDIBackend::~NDIBackend ()
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{
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clear_ports ();
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}
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/* AUDIOBACKEND API */
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std::string
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NDIBackend::name () const
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{
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return X_("NDI");
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}
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bool
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NDIBackend::is_realtime () const
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{
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return true;
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}
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std::vector<AudioBackend::DeviceStatus>
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NDIBackend::enumerate_devices () const
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{
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std::vector<AudioBackend::DeviceStatus> devices;
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devices.push_back (DeviceStatus (_("Default Playback"), true));
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return devices;
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}
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std::vector<float>
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NDIBackend::available_sample_rates (const std::string&) const
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{
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std::vector<float> sr;
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sr.push_back (8000.0);
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sr.push_back (22050.0);
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sr.push_back (24000.0);
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sr.push_back (44100.0);
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sr.push_back (48000.0);
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sr.push_back (88200.0);
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sr.push_back (96000.0);
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sr.push_back (176400.0);
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sr.push_back (192000.0);
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return sr;
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}
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std::vector<uint32_t>
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NDIBackend::available_buffer_sizes (const std::string&) const
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{
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std::vector<uint32_t> bs;
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bs.push_back (64);
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bs.push_back (128);
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bs.push_back (256);
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bs.push_back (512);
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bs.push_back (1024);
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bs.push_back (2048);
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bs.push_back (4096);
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bs.push_back (8192);
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return bs;
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}
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uint32_t
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NDIBackend::available_input_channel_count (const std::string&) const
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{
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return 0;
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}
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uint32_t
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NDIBackend::available_output_channel_count (const std::string&) const
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{
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return N_CHANNELS;
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}
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bool
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NDIBackend::can_change_sample_rate_when_running () const
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{
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return false;
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}
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bool
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NDIBackend::can_change_buffer_size_when_running () const
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{
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return false;
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}
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int
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NDIBackend::set_device_name (const std::string& d)
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{
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return 0;
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}
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int
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NDIBackend::set_sample_rate (float sr)
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{
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if (sr <= 0) {
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return -1;
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}
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_samplerate = sr;
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engine.sample_rate_change (sr);
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return 0;
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}
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int
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NDIBackend::set_buffer_size (uint32_t bs)
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{
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if (bs <= 0 || bs > _max_buffer_size) {
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return -1;
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}
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_samples_per_period = bs;
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engine.buffer_size_change (bs);
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return 0;
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}
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int
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NDIBackend::set_interleaved (bool yn)
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{
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if (!yn) {
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return 0;
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}
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return -1;
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}
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int
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NDIBackend::set_input_channels (uint32_t cc)
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{
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return 0;
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}
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int
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NDIBackend::set_output_channels (uint32_t cc)
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{
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return 0;
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}
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int
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NDIBackend::set_systemic_input_latency (uint32_t sl)
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{
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return 0; // XXX
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}
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int
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NDIBackend::set_systemic_output_latency (uint32_t sl)
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{
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return 0; // XXX
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}
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/* Retrieving parameters */
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std::string
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NDIBackend::device_name () const
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{
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return _("Default Playback");
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}
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float
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NDIBackend::sample_rate () const
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{
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return _samplerate;
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}
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uint32_t
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NDIBackend::buffer_size () const
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{
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return _samples_per_period;
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}
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bool
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NDIBackend::interleaved () const
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{
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return false;
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}
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uint32_t
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NDIBackend::input_channels () const
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{
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return N_CHANNELS;
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}
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uint32_t
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NDIBackend::output_channels () const
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{
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return N_CHANNELS;
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}
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uint32_t
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NDIBackend::systemic_input_latency () const
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{
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return _systemic_audio_input_latency;
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}
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uint32_t
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NDIBackend::systemic_output_latency () const
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{
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return _systemic_audio_output_latency;
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}
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/* MIDI */
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std::vector<std::string>
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NDIBackend::enumerate_midi_options () const
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{
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std::vector<std::string> midi_options;
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midi_options.push_back (get_standard_device_name (DeviceNone));
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return midi_options;
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}
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std::vector<AudioBackend::DeviceStatus>
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NDIBackend::enumerate_midi_devices () const
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{
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return std::vector<AudioBackend::DeviceStatus> ();
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}
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int
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NDIBackend::set_midi_option (const std::string& opt)
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{
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return 0;
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}
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std::string
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NDIBackend::midi_option () const
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{
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return get_standard_device_name (DeviceNone);
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}
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/* External control app */
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std::string
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NDIBackend::control_app_name () const
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{
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return "";
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}
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void
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NDIBackend::launch_control_app ()
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{
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}
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/* State Control */
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static void*
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pthread_process (void* arg)
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{
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NDIBackend* d = static_cast<NDIBackend*> (arg);
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d->main_process_thread ();
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pthread_exit (0);
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return 0;
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}
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int
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NDIBackend::_start (bool /*for_latency_measurement*/)
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{
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if (!_active && _run) {
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PBD::error << _("NDIBackend: already active.") << endmsg;
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/* recover from 'halted', reap threads */
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stop ();
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}
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if (_active || _run) {
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PBD::info << _("NDIBackend: already active.") << endmsg;
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return BackendReinitializationError;
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}
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clear_ports ();
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/* reset internal state */
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_dsp_load = 0;
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_freewheeling = false;
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_freewheel = false;
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_last_process_start = 0;
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_systemic_audio_input_latency = 0;
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_systemic_audio_output_latency = 0;
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/* TODO connect to NDI-server and prepare stream */
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/* register ports, notify port-engine */
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if (register_system_ports ()) {
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PBD::error << _("NDIBackend: failed to register system ports.") << endmsg;
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// close_ndi (); // XXX
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return PortRegistrationError;
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}
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engine.sample_rate_change (_samplerate);
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engine.buffer_size_change (_samples_per_period);
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if (engine.reestablish_ports ()) {
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PBD::error << _("NDIBackend: Could not re-establish ports.") << endmsg;
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// close_ndi (); // XXX
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return PortReconnectError;
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}
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engine.reconnect_ports ();
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_run = true;
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g_atomic_int_set (&_port_change_flag, 0);
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if (pbd_realtime_pthread_create (PBD_SCHED_FIFO, PBD_RT_PRI_MAIN, PBD_RT_STACKSIZE_PROC,
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&_main_thread, pthread_process, this)) {
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if (pbd_pthread_create (PBD_RT_STACKSIZE_PROC, &_main_thread, pthread_process, this)) {
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PBD::error << _("NDIBackend: failed to create process thread.") << endmsg;
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stop ();
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_run = false;
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return ProcessThreadStartError;
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} else {
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PBD::warning << _("NDIBackend: cannot acquire realtime permissions.") << endmsg;
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}
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}
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int timeout = 5000;
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while (!_active && --timeout > 0) {
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Glib::usleep (1000);
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}
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if (timeout == 0 || !_active) {
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PBD::error << _("NDIBackend: failed to start process thread.") << endmsg;
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_run = false;
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// close_ndi (); // XXX
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return ProcessThreadStartError;
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}
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return NoError;
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}
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int
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NDIBackend::stop ()
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{
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void* status;
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if (!_run) {
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return 0;
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}
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_run = false;
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/* TODO: STOP NDI */
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if (pthread_join (_main_thread, &status)) {
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PBD::error << _("NDIBackend: failed to terminate.") << endmsg;
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return -1;
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}
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unregister_ports ();
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/* TODO: close NDI connection */
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return (_active == false) ? 0 : -1;
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}
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int
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NDIBackend::freewheel (bool onoff)
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{
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_freewheeling = onoff;
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return 0;
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}
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float
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NDIBackend::dsp_load () const
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{
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return 100.f * _dsp_load;
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}
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size_t
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NDIBackend::raw_buffer_size (DataType t)
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{
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switch (t) {
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case DataType::AUDIO:
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return _samples_per_period * sizeof (Sample);
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case DataType::MIDI:
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return _max_buffer_size;
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}
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return 0;
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}
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/* Process time */
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samplepos_t
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NDIBackend::sample_time ()
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{
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return _processed_samples;
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}
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samplepos_t
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NDIBackend::sample_time_at_cycle_start ()
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{
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return _processed_samples;
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}
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pframes_t
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NDIBackend::samples_since_cycle_start ()
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{
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if (!_active || !_run || _freewheeling || _freewheel) {
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return 0;
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}
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if (_last_process_start == 0) {
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return 0;
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}
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const int64_t elapsed_time_us = g_get_monotonic_time () - _last_process_start;
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return std::max ((pframes_t)0, (pframes_t)rint (1e-6 * elapsed_time_us * _samplerate));
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}
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void*
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NDIBackend::ndi_process_thread (void* arg)
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{
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ThreadData* td = reinterpret_cast<ThreadData*> (arg);
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boost::function<void ()> f = td->f;
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delete td;
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f ();
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return 0;
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}
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int
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NDIBackend::create_process_thread (boost::function<void ()> func)
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{
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pthread_t thread_id;
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ThreadData* td = new ThreadData (this, func, PBD_RT_STACKSIZE_PROC);
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if (pbd_realtime_pthread_create (PBD_SCHED_FIFO, PBD_RT_PRI_PROC, PBD_RT_STACKSIZE_PROC,
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&thread_id, ndi_process_thread, td)) {
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if (pbd_pthread_create (PBD_RT_STACKSIZE_PROC, &thread_id, ndi_process_thread, td)) {
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PBD::error << _("AudioEngine: cannot create process thread.") << endmsg;
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return -1;
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}
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}
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_threads.push_back (thread_id);
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return 0;
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}
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int
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NDIBackend::join_process_threads ()
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{
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int rv = 0;
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for (std::vector<pthread_t>::const_iterator i = _threads.begin (); i != _threads.end (); ++i) {
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void* status;
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if (pthread_join (*i, &status)) {
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PBD::error << _("AudioEngine: cannot terminate process thread.") << endmsg;
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rv -= 1;
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}
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}
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_threads.clear ();
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return rv;
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}
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bool
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NDIBackend::in_process_thread ()
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{
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if (pthread_equal (_main_thread, pthread_self ()) != 0) {
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return true;
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}
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for (std::vector<pthread_t>::const_iterator i = _threads.begin (); i != _threads.end (); ++i) {
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if (pthread_equal (*i, pthread_self ()) != 0) {
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return true;
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}
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}
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return false;
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}
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uint32_t
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NDIBackend::process_thread_count ()
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{
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return _threads.size ();
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}
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void
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NDIBackend::update_latencies ()
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{
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/* trigger latency callback in RT thread (locked graph) */
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port_connect_add_remove_callback ();
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}
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/* PORTENGINE API */
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void*
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NDIBackend::private_handle () const
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{
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return NULL;
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}
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const std::string&
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NDIBackend::my_name () const
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{
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return _instance_name;
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}
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int
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NDIBackend::register_system_ports ()
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{
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LatencyRange lr;
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/* input/source ports */
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lr.min = lr.max = _systemic_audio_input_latency;
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for (int i = 1; i <= N_CHANNELS; ++i) {
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char tmp[64];
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snprintf (tmp, sizeof (tmp), "system:capture_%d", i);
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BackendPortPtr p = add_port (std::string (tmp), DataType::AUDIO, static_cast<PortFlags> (IsOutput | IsPhysical | IsTerminal));
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if (!p) {
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return -1;
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}
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set_latency_range (p, true, lr);
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_system_inputs.push_back (p);
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}
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/* output/sink ports */
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lr.min = lr.max = _systemic_audio_output_latency;
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for (int i = 1; i <= N_CHANNELS; ++i) {
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char tmp[64];
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snprintf (tmp, sizeof (tmp), "system:playback_%d", i);
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BackendPortPtr p = add_port (std::string (tmp), DataType::AUDIO, static_cast<PortFlags> (IsInput | IsPhysical | IsTerminal));
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if (!p) {
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return -1;
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}
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set_latency_range (p, true, lr);
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//p->set_hw_port_name ("")
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_system_outputs.push_back (p);
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}
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return 0;
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}
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BackendPort*
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NDIBackend::port_factory (std::string const& name, ARDOUR::DataType type, ARDOUR::PortFlags flags)
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{
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BackendPort* port = 0;
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switch (type) {
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case DataType::AUDIO:
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port = new NDIAudioPort (*this, name, flags);
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break;
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case DataType::MIDI:
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port = new NDIMidiPort (*this, name, flags);
|
|
break;
|
|
default:
|
|
PBD::error << string_compose (_("%1::register_port: Invalid Data Type."), _instance_name) << endmsg;
|
|
return 0;
|
|
}
|
|
|
|
return port;
|
|
}
|
|
|
|
/* MIDI */
|
|
int
|
|
NDIBackend::midi_event_get (pframes_t& timestamp, size_t& size, uint8_t const** buf, void* port_buffer, uint32_t event_index)
|
|
{
|
|
assert (buf && port_buffer);
|
|
NDIMidiBuffer& source = *static_cast<NDIMidiBuffer*> (port_buffer);
|
|
if (event_index >= source.size ()) {
|
|
return -1;
|
|
}
|
|
NDIMidiEvent* const event = source[event_index].get ();
|
|
|
|
timestamp = event->timestamp ();
|
|
size = event->size ();
|
|
*buf = event->data ();
|
|
return 0;
|
|
}
|
|
|
|
int
|
|
NDIBackend::midi_event_put (void* port_buffer,
|
|
pframes_t timestamp,
|
|
const uint8_t* buffer, size_t size)
|
|
{
|
|
assert (buffer && port_buffer);
|
|
NDIMidiBuffer& dst = *static_cast<NDIMidiBuffer*> (port_buffer);
|
|
dst.push_back (boost::shared_ptr<NDIMidiEvent> (new NDIMidiEvent (timestamp, buffer, size)));
|
|
return 0;
|
|
}
|
|
|
|
uint32_t
|
|
NDIBackend::get_midi_event_count (void* port_buffer)
|
|
{
|
|
assert (port_buffer);
|
|
return static_cast<NDIMidiBuffer*> (port_buffer)->size ();
|
|
}
|
|
|
|
void
|
|
NDIBackend::midi_clear (void* port_buffer)
|
|
{
|
|
assert (port_buffer);
|
|
NDIMidiBuffer* buf = static_cast<NDIMidiBuffer*> (port_buffer);
|
|
assert (buf);
|
|
buf->clear ();
|
|
}
|
|
|
|
/* Monitoring */
|
|
|
|
bool
|
|
NDIBackend::can_monitor_input () const
|
|
{
|
|
return false;
|
|
}
|
|
|
|
int
|
|
NDIBackend::request_input_monitoring (PortEngine::PortHandle, bool)
|
|
{
|
|
return -1;
|
|
}
|
|
|
|
int
|
|
NDIBackend::ensure_input_monitoring (PortEngine::PortHandle, bool)
|
|
{
|
|
return -1;
|
|
}
|
|
|
|
bool
|
|
NDIBackend::monitoring_input (PortEngine::PortHandle)
|
|
{
|
|
return false;
|
|
}
|
|
|
|
/* Latency management */
|
|
|
|
void
|
|
NDIBackend::set_latency_range (PortEngine::PortHandle port_handle, bool for_playback, LatencyRange latency_range)
|
|
{
|
|
BackendPortPtr port = boost::dynamic_pointer_cast<BackendPort> (port_handle);
|
|
if (!valid_port (port)) {
|
|
PBD::error << _("NDIAudioPort::set_latency_range (): invalid port.") << endmsg;
|
|
}
|
|
port->set_latency_range (latency_range, for_playback);
|
|
}
|
|
|
|
LatencyRange
|
|
NDIBackend::get_latency_range (PortEngine::PortHandle port_handle, bool for_playback)
|
|
{
|
|
BackendPortPtr port = boost::dynamic_pointer_cast<BackendPort> (port_handle);
|
|
LatencyRange r;
|
|
|
|
if (!valid_port (port)) {
|
|
PBD::error << _("NDIAudioPort::get_latency_range (): invalid port.") << endmsg;
|
|
r.min = 0;
|
|
r.max = 0;
|
|
return r;
|
|
}
|
|
|
|
r = port->latency_range (for_playback);
|
|
|
|
if (port->is_physical () && port->is_terminal ()) {
|
|
if (port->is_input () && for_playback) {
|
|
r.min += _samples_per_period + _systemic_audio_output_latency;
|
|
r.max += _samples_per_period + _systemic_audio_output_latency;
|
|
}
|
|
if (port->is_output () && !for_playback) {
|
|
r.min += _samples_per_period + _systemic_audio_input_latency;
|
|
r.max += _samples_per_period + _systemic_audio_input_latency;
|
|
}
|
|
}
|
|
|
|
return r;
|
|
}
|
|
|
|
/* Getting access to the data buffer for a port */
|
|
|
|
void*
|
|
NDIBackend::get_buffer (PortEngine::PortHandle port_handle, pframes_t nframes)
|
|
{
|
|
BackendPortPtr port = boost::dynamic_pointer_cast<BackendPort> (port_handle);
|
|
|
|
assert (port);
|
|
assert (valid_port (port));
|
|
|
|
return port->get_buffer (nframes);
|
|
}
|
|
|
|
/* Engine Process */
|
|
void*
|
|
NDIBackend::main_process_thread ()
|
|
{
|
|
AudioEngine::thread_init_callback (this);
|
|
_active = true;
|
|
_processed_samples = 0;
|
|
|
|
manager.registration_callback ();
|
|
manager.graph_order_callback ();
|
|
|
|
/* TODO begin NDI streaming */
|
|
|
|
_dsp_load_calc.reset ();
|
|
|
|
while (_run) {
|
|
if (_freewheeling != _freewheel) {
|
|
_freewheel = _freewheeling;
|
|
engine.freewheel_callback (_freewheel);
|
|
|
|
if (_freewheel) {
|
|
/* TODO pause NDI stream */
|
|
}
|
|
|
|
/* TODO flush stream (before and after freewheeling) */
|
|
|
|
if (!_freewheel) {
|
|
/* TODO resume NDI stream */
|
|
_dsp_load_calc.reset ();
|
|
}
|
|
}
|
|
|
|
if (!_freewheel) {
|
|
/* TODO: wait for NDI to provide data */
|
|
|
|
int64_t clock1 = g_get_monotonic_time ();
|
|
/* call engine process callback */
|
|
_last_process_start = g_get_monotonic_time ();
|
|
if (engine.process_callback (_samples_per_period)) {
|
|
/* ERROR -- TODO: stop NDI stream */
|
|
_active = false;
|
|
return 0;
|
|
}
|
|
|
|
/* write back audio */
|
|
uint32_t i = 0;
|
|
float buf[_max_buffer_size * N_CHANNELS];
|
|
assert (_system_outputs.size () == N_CHANNELS);
|
|
|
|
/* interleave */
|
|
for (std::vector<BackendPortPtr>::const_iterator it = _system_outputs.begin (); it != _system_outputs.end (); ++it, ++i) {
|
|
BackendPortPtr port = boost::dynamic_pointer_cast<BackendPort> (*it);
|
|
const float* src = (const float*)port->get_buffer (_samples_per_period);
|
|
for (size_t n = 0; n < _samples_per_period; ++n) {
|
|
buf[N_CHANNELS * n + i] = src[n];
|
|
}
|
|
}
|
|
/* TODO write interlevaed data to NDI */
|
|
|
|
_processed_samples += _samples_per_period;
|
|
|
|
_dsp_load_calc.set_max_time (_samplerate, _samples_per_period);
|
|
_dsp_load_calc.set_start_timestamp_us (clock1);
|
|
_dsp_load_calc.set_stop_timestamp_us (g_get_monotonic_time ());
|
|
_dsp_load = _dsp_load_calc.get_dsp_load ();
|
|
|
|
#if 1 // Sleep for now
|
|
const int64_t elapsed_time = _dsp_load_calc.elapsed_time_us ();
|
|
const int64_t nominal_time = _dsp_load_calc.get_max_time_us ();
|
|
const int64_t sleepy = nominal_time - elapsed_time;
|
|
Glib::usleep (std::max ((int64_t) 100, sleepy));
|
|
#endif
|
|
} else {
|
|
/* Freewheelin' */
|
|
_last_process_start = 0;
|
|
if (engine.process_callback (_samples_per_period)) {
|
|
_active = false;
|
|
return 0;
|
|
}
|
|
|
|
_dsp_load = 1.0f;
|
|
Glib::usleep (100); // don't hog cpu
|
|
}
|
|
|
|
bool connections_changed = false;
|
|
bool ports_changed = false;
|
|
if (!pthread_mutex_trylock (&_port_callback_mutex)) {
|
|
if (g_atomic_int_compare_and_exchange (&_port_change_flag, 1, 0)) {
|
|
ports_changed = true;
|
|
}
|
|
if (!_port_connection_queue.empty ()) {
|
|
connections_changed = true;
|
|
}
|
|
while (!_port_connection_queue.empty ()) {
|
|
PortConnectData* c = _port_connection_queue.back ();
|
|
manager.connect_callback (c->a, c->b, c->c);
|
|
_port_connection_queue.pop_back ();
|
|
delete c;
|
|
}
|
|
pthread_mutex_unlock (&_port_callback_mutex);
|
|
}
|
|
if (ports_changed) {
|
|
manager.registration_callback ();
|
|
}
|
|
if (connections_changed) {
|
|
manager.graph_order_callback ();
|
|
}
|
|
if (connections_changed || ports_changed) {
|
|
update_system_port_latencies ();
|
|
engine.latency_callback (false);
|
|
engine.latency_callback (true);
|
|
}
|
|
}
|
|
|
|
_active = false;
|
|
if (_run) {
|
|
engine.halted_callback ("NDI I/O error.");
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/******************************************************************************/
|
|
|
|
static boost::shared_ptr<NDIBackend> _instance;
|
|
|
|
static boost::shared_ptr<AudioBackend> backend_factory (AudioEngine& e);
|
|
static int instantiate (const std::string& arg1, const std::string& /* arg2 */);
|
|
static int deinstantiate ();
|
|
static bool already_configured ();
|
|
static bool available ();
|
|
|
|
static ARDOUR::AudioBackendInfo _descriptor = {
|
|
_("NDI"),
|
|
instantiate,
|
|
deinstantiate,
|
|
backend_factory,
|
|
already_configured,
|
|
available
|
|
};
|
|
|
|
static boost::shared_ptr<AudioBackend>
|
|
backend_factory (AudioEngine& e)
|
|
{
|
|
if (!_instance) {
|
|
_instance.reset (new NDIBackend (e, _descriptor));
|
|
}
|
|
return _instance;
|
|
}
|
|
|
|
static int
|
|
instantiate (const std::string& arg1, const std::string& /* arg2 */)
|
|
{
|
|
s_instance_name = arg1;
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
deinstantiate ()
|
|
{
|
|
_instance.reset ();
|
|
return 0;
|
|
}
|
|
|
|
static bool
|
|
already_configured ()
|
|
{
|
|
return false;
|
|
}
|
|
|
|
static bool
|
|
available ()
|
|
{
|
|
return true;
|
|
}
|
|
|
|
extern "C" ARDOURBACKEND_API ARDOUR::AudioBackendInfo* descriptor ()
|
|
{
|
|
return &_descriptor;
|
|
}
|
|
|
|
/******************************************************************************/
|
|
|
|
NDIAudioPort::NDIAudioPort (NDIBackend& b, const std::string& name, PortFlags flags)
|
|
: BackendPort (b, name, flags)
|
|
{
|
|
memset (_buffer, 0, sizeof (_buffer));
|
|
mlock (_buffer, sizeof (_buffer));
|
|
}
|
|
|
|
NDIAudioPort::~NDIAudioPort ()
|
|
{
|
|
}
|
|
|
|
void*
|
|
NDIAudioPort::get_buffer (pframes_t n_samples)
|
|
{
|
|
if (is_input ()) {
|
|
const std::set<BackendPortPtr>& connections = get_connections ();
|
|
std::set<BackendPortPtr>::const_iterator it = connections.begin ();
|
|
|
|
if (it == connections.end ()) {
|
|
memset (_buffer, 0, n_samples * sizeof (Sample));
|
|
} else {
|
|
boost::shared_ptr<NDIAudioPort> source = boost::dynamic_pointer_cast<NDIAudioPort> (*it);
|
|
assert (source && source->is_output ());
|
|
memcpy (_buffer, source->const_buffer (), n_samples * sizeof (Sample));
|
|
while (++it != connections.end ()) {
|
|
source = boost::dynamic_pointer_cast<NDIAudioPort> (*it);
|
|
assert (source && source->is_output ());
|
|
Sample* dst = buffer ();
|
|
const Sample* src = source->const_buffer ();
|
|
for (uint32_t s = 0; s < n_samples; ++s, ++dst, ++src) {
|
|
*dst += *src;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
return _buffer;
|
|
}
|
|
|
|
NDIMidiPort::NDIMidiPort (NDIBackend& b, const std::string& name, PortFlags flags)
|
|
: BackendPort (b, name, flags)
|
|
{
|
|
_buffer.clear ();
|
|
_buffer.reserve (256);
|
|
}
|
|
|
|
NDIMidiPort::~NDIMidiPort ()
|
|
{
|
|
}
|
|
|
|
struct MidiEventSorter {
|
|
bool
|
|
operator() (const boost::shared_ptr<NDIMidiEvent>& a, const boost::shared_ptr<NDIMidiEvent>& b)
|
|
{
|
|
return *a < *b;
|
|
}
|
|
};
|
|
|
|
void* NDIMidiPort::get_buffer (pframes_t /*n_samples*/)
|
|
{
|
|
if (is_input ()) {
|
|
_buffer.clear ();
|
|
const std::set<BackendPortPtr>& connections = get_connections ();
|
|
for (std::set<BackendPortPtr>::const_iterator i = connections.begin ();
|
|
i != connections.end ();
|
|
++i) {
|
|
const NDIMidiBuffer* src = boost::dynamic_pointer_cast<NDIMidiPort> (*i)->const_buffer ();
|
|
for (NDIMidiBuffer::const_iterator it = src->begin (); it != src->end (); ++it) {
|
|
_buffer.push_back (*it);
|
|
}
|
|
}
|
|
std::stable_sort (_buffer.begin (), _buffer.end (), MidiEventSorter ());
|
|
}
|
|
return &_buffer;
|
|
}
|
|
|
|
NDIMidiEvent::NDIMidiEvent (const pframes_t timestamp, const uint8_t* data, size_t size)
|
|
: _size (size)
|
|
, _timestamp (timestamp)
|
|
{
|
|
if (size > 0 && size < MaxNDIMidiEventSize) {
|
|
memcpy (_data, data, size);
|
|
}
|
|
}
|
|
|
|
NDIMidiEvent::NDIMidiEvent (const NDIMidiEvent& other)
|
|
: _size (other.size ())
|
|
, _timestamp (other.timestamp ())
|
|
{
|
|
if (other.size () && other.const_data ()) {
|
|
assert (other._size < MaxNDIMidiEventSize);
|
|
memcpy (_data, other._data, other._size);
|
|
}
|
|
};
|