virtual abstraction of Alsa Raw+Seq
This commit is contained in:
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5e436fc8fc
commit
6648074a13
@ -382,8 +382,15 @@ AlsaAudioBackend::midi_device_info(std::string const name) const {
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}
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}
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assert(_midi_driver_option != _("None"));
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std::map<std::string, std::string> devices;
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get_alsa_rawmidi_device_names(devices);
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if (_midi_driver_option == _("ALSA raw devices")) {
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get_alsa_rawmidi_device_names(devices);
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} else {
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get_alsa_sequencer_names (devices);
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}
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for (std::map<std::string, std::string>::const_iterator i = devices.begin (); i != devices.end(); ++i) {
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if (i->first == name) {
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_midi_devices[name] = new AlsaMidiDeviceInfo();
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@ -399,6 +406,7 @@ AlsaAudioBackend::enumerate_midi_options () const
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std::vector<std::string> m;
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m.push_back (_("None"));
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m.push_back (_("ALSA raw devices"));
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m.push_back (_("ALSA sequencer"));
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return m;
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}
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@ -406,13 +414,17 @@ std::vector<AudioBackend::DeviceStatus>
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AlsaAudioBackend::enumerate_midi_devices () const
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{
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std::vector<AudioBackend::DeviceStatus> s;
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if (_midi_driver_option == _("None")) {
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std::map<std::string, std::string> devices;
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if (_midi_driver_option == _("ALSA raw devices")) {
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get_alsa_rawmidi_device_names (devices);
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}
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else if (_midi_driver_option == _("ALSA sequencer")) {
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get_alsa_sequencer_names (devices);
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} else {
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return s;
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}
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std::map<std::string, std::string> devices;
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get_alsa_rawmidi_device_names(devices);
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for (std::map<std::string, std::string>::const_iterator i = devices.begin (); i != devices.end(); ++i) {
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s.push_back (DeviceStatus (i->first, true));
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}
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@ -422,7 +434,7 @@ AlsaAudioBackend::enumerate_midi_devices () const
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int
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AlsaAudioBackend::set_midi_option (const std::string& opt)
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{
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if (opt != _("None") && opt != _("ALSA raw devices")) {
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if (opt != _("None") && opt != _("ALSA raw devices") && opt != _("ALSA sequencer")) {
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return -1;
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}
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_midi_driver_option = opt;
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@ -620,13 +632,13 @@ AlsaAudioBackend::stop ()
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}
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while (!_rmidi_out.empty ()) {
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AlsaRawMidiIO *m = _rmidi_out.back ();
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AlsaMidiIO *m = _rmidi_out.back ();
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m->stop();
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_rmidi_out.pop_back ();
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delete m;
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}
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while (!_rmidi_in.empty ()) {
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AlsaRawMidiIO *m = _rmidi_in.back ();
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AlsaMidiIO *m = _rmidi_in.back ();
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m->stop();
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_rmidi_in.pop_back ();
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delete m;
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@ -954,18 +966,27 @@ AlsaAudioBackend::register_system_midi_ports()
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if (_midi_driver_option == _("None")) {
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return 0;
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} else if (_midi_driver_option == _("ALSA raw devices")) {
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get_alsa_rawmidi_device_names(devices);
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} else {
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get_alsa_sequencer_names (devices);
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}
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get_alsa_rawmidi_device_names(devices);
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for (std::map<std::string, std::string>::const_iterator i = devices.begin (); i != devices.end(); ++i) {
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struct AlsaMidiDeviceInfo * nfo = midi_device_info(i->first);
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if (!nfo) continue;
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if (!nfo->enabled) continue;
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AlsaRawMidiOut *mout = new AlsaRawMidiOut (i->second.c_str());
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AlsaMidiOut *mout;
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if (_midi_driver_option == _("ALSA raw devices")) {
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mout = new AlsaRawMidiOut (i->second.c_str());
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} else {
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mout = new AlsaSeqMidiOut (i->second.c_str());
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}
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if (mout->state ()) {
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PBD::warning << string_compose (
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_("AlsaRawMidiOut: failed to open midi device '%1'."), i->second)
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_("AlsaMidiOut: failed to open midi device '%1'."), i->second)
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<< endmsg;
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delete mout;
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} else {
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@ -973,7 +994,7 @@ AlsaAudioBackend::register_system_midi_ports()
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mout->sync_time (g_get_monotonic_time());
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if (mout->start ()) {
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PBD::warning << string_compose (
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_("AlsaRawMidiOut: failed to start midi device '%1'."), i->second)
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_("AlsaMidiOut: failed to start midi device '%1'."), i->second)
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<< endmsg;
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delete mout;
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} else {
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@ -992,10 +1013,16 @@ AlsaAudioBackend::register_system_midi_ports()
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}
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}
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AlsaRawMidiIn *midin = new AlsaRawMidiIn (i->second.c_str());
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AlsaMidiIn *midin;
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if (_midi_driver_option == _("ALSA raw devices")) {
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midin = new AlsaRawMidiIn (i->second.c_str());
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} else {
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midin = new AlsaSeqMidiIn (i->second.c_str());
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}
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if (midin->state ()) {
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PBD::warning << string_compose (
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_("AlsaRawMidiIn: failed to open midi device '%1'."), i->second)
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_("AlsaMidiIn: failed to open midi device '%1'."), i->second)
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<< endmsg;
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delete midin;
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} else {
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@ -1003,7 +1030,7 @@ AlsaAudioBackend::register_system_midi_ports()
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midin->sync_time (g_get_monotonic_time());
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if (midin->start ()) {
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PBD::warning << string_compose (
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_("AlsaRawMidiIn: failed to start midi device '%1'."), i->second)
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_("AlsaMidiIn: failed to start midi device '%1'."), i->second)
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<< endmsg;
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delete midin;
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} else {
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@ -1401,10 +1428,10 @@ AlsaAudioBackend::main_process_thread ()
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i = 0;
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for (std::vector<AlsaPort*>::const_iterator it = _system_midi_in.begin (); it != _system_midi_in.end (); ++it, ++i) {
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assert (_rmidi_in.size() > i);
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AlsaRawMidiIn *rm = static_cast<AlsaRawMidiIn*>(_rmidi_in.at(i));
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AlsaMidiIn *rm = static_cast<AlsaMidiIn*>(_rmidi_in.at(i));
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void *bptr = (*it)->get_buffer(0);
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pframes_t time;
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uint8_t data[64]; // match MaxAlsaRawEventSize in alsa_rawmidi.cc
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uint8_t data[64]; // match MaxAlsaEventSize in alsa_rawmidi.cc
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size_t size = sizeof(data);
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midi_clear(bptr);
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while (rm->recv_event (time, data, size)) {
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@ -1434,7 +1461,7 @@ AlsaAudioBackend::main_process_thread ()
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for (std::vector<AlsaPort*>::const_iterator it = _system_midi_out.begin (); it != _system_midi_out.end (); ++it, ++i) {
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assert (_rmidi_out.size() > i);
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const AlsaMidiBuffer src = static_cast<const AlsaMidiPort*>(*it)->const_buffer();
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AlsaRawMidiOut *rm = static_cast<AlsaRawMidiOut*>(_rmidi_out.at(i));
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AlsaMidiOut *rm = static_cast<AlsaMidiOut*>(_rmidi_out.at(i));
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rm->sync_time (clock1);
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for (AlsaMidiBuffer::const_iterator mit = src.begin (); mit != src.end (); ++mit) {
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rm->send_event ((*mit)->timestamp(), (*mit)->data(), (*mit)->size());
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@ -36,6 +36,7 @@
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#include "zita-alsa-pcmi.h"
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#include "alsa_rawmidi.h"
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#include "alsa_sequencer.h"
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namespace ARDOUR {
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@ -367,8 +368,8 @@ class AlsaAudioBackend : public AudioBackend {
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std::vector<AlsaPort *> _system_midi_in;
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std::vector<AlsaPort *> _system_midi_out;
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std::vector<AlsaRawMidiOut *> _rmidi_out;
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std::vector<AlsaRawMidiIn *> _rmidi_in;
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std::vector<AlsaMidiOut *> _rmidi_out;
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std::vector<AlsaMidiIn *> _rmidi_in;
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struct PortConnectData {
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std::string a;
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243
libs/backends/alsa/alsa_midi.cc
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243
libs/backends/alsa/alsa_midi.cc
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@ -0,0 +1,243 @@
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/*
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* Copyright (C) 2014 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
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#include <unistd.h>
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#include <glibmm.h>
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#include "alsa_midi.h"
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#include "rt_thread.h"
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#include "pbd/error.h"
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#include "i18n.h"
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using namespace ARDOUR;
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#ifndef NDEBUG
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#define _DEBUGPRINT(STR) fprintf(stderr, STR);
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#else
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#define _DEBUGPRINT(STR) ;
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#endif
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AlsaMidiIO::AlsaMidiIO ()
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: _state (-1)
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, _running (false)
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, _pfds (0)
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, _sample_length_us (1e6 / 48000.0)
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, _period_length_us (1.024e6 / 48000.0)
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, _samples_per_period (1024)
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, _rb (0)
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{
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pthread_mutex_init (&_notify_mutex, 0);
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pthread_cond_init (&_notify_ready, 0);
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// MIDI (hw port) 31.25 kbaud
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// worst case here is 8192 SPP and 8KSPS for which we'd need
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// 4000 bytes sans MidiEventHeader.
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// since we're not always in sync, let's use 4096.
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_rb = new RingBuffer<uint8_t>(4096 + 4096 * sizeof(MidiEventHeader));
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}
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AlsaMidiIO::~AlsaMidiIO ()
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{
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delete _rb;
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pthread_mutex_destroy (&_notify_mutex);
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pthread_cond_destroy (&_notify_ready);
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free (_pfds);
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}
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static void * pthread_process (void *arg)
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{
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AlsaMidiIO *d = static_cast<AlsaMidiIO *>(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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AlsaMidiIO::start ()
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{
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if (_realtime_pthread_create (SCHED_FIFO, -21, 100000,
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&_main_thread, pthread_process, this))
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{
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if (pthread_create (&_main_thread, NULL, pthread_process, this)) {
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PBD::error << _("AlsaMidiIO: Failed to create process thread.") << endmsg;
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return -1;
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} else {
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PBD::warning << _("AlsaMidiIO: 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 (!_running && --timeout > 0) { Glib::usleep (1000); }
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if (timeout == 0 || !_running) {
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return -1;
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}
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return 0;
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}
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int
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AlsaMidiIO::stop ()
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{
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void *status;
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if (!_running) {
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return 0;
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}
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_running = false;
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pthread_mutex_lock (&_notify_mutex);
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pthread_cond_signal (&_notify_ready);
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pthread_mutex_unlock (&_notify_mutex);
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if (pthread_join (_main_thread, &status)) {
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PBD::error << _("AlsaMidiIO: Failed to terminate.") << endmsg;
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return -1;
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}
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return 0;
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}
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void
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AlsaMidiIO::setup_timing (const size_t samples_per_period, const float samplerate)
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{
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_period_length_us = (double) samples_per_period * 1e6 / samplerate;
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_sample_length_us = 1e6 / samplerate;
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_samples_per_period = samples_per_period;
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}
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void
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AlsaMidiIO::sync_time (const uint64_t tme)
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{
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// TODO consider a PLL, if this turns out to be the bottleneck for jitter
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// also think about using
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// snd_pcm_status_get_tstamp() and snd_rawmidi_status_get_tstamp()
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// instead of monotonic clock.
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#ifdef DEBUG_TIMING
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double tdiff = (_clock_monotonic + _period_length_us - tme) / 1000.0;
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if (abs(tdiff) >= .05) {
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printf("AlsaMidiIO MJ: %.1f ms\n", tdiff);
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}
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#endif
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_clock_monotonic = tme;
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}
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///////////////////////////////////////////////////////////////////////////////
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AlsaMidiOut::AlsaMidiOut ()
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: AlsaMidiIO ()
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{
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}
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int
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AlsaMidiOut::send_event (const pframes_t time, const uint8_t *data, const size_t size)
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{
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const uint32_t buf_size = sizeof (MidiEventHeader) + size;
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if (_rb->write_space() < buf_size) {
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_DEBUGPRINT("AlsaMidiOut: ring buffer overflow\n");
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return -1;
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}
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struct MidiEventHeader h (_clock_monotonic + time * _sample_length_us, size);
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_rb->write ((uint8_t*) &h, sizeof(MidiEventHeader));
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_rb->write (data, size);
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if (pthread_mutex_trylock (&_notify_mutex) == 0) {
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pthread_cond_signal (&_notify_ready);
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pthread_mutex_unlock (&_notify_mutex);
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}
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return 0;
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}
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///////////////////////////////////////////////////////////////////////////////
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AlsaMidiIn::AlsaMidiIn ()
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: AlsaMidiIO ()
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{
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}
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size_t
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AlsaMidiIn::recv_event (pframes_t &time, uint8_t *data, size_t &size)
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{
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const uint32_t read_space = _rb->read_space();
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struct MidiEventHeader h(0,0);
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if (read_space <= sizeof(MidiEventHeader)) {
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return 0;
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}
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RingBuffer<uint8_t>::rw_vector vector;
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_rb->get_read_vector(&vector);
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if (vector.len[0] >= sizeof(MidiEventHeader)) {
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memcpy((uint8_t*)&h, vector.buf[0], sizeof(MidiEventHeader));
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} else {
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if (vector.len[0] > 0) {
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memcpy ((uint8_t*)&h, vector.buf[0], vector.len[0]);
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}
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memcpy (((uint8_t*)&h) + vector.len[0], vector.buf[1], sizeof(MidiEventHeader) - vector.len[0]);
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}
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if (h.time >= _clock_monotonic + _period_length_us ) {
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#ifdef DEBUG_TIMING
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printf("AlsaMidiIn DEBUG: POSTPONE EVENT TO NEXT CYCLE: %.1f spl\n", ((h.time - _clock_monotonic) / _sample_length_us));
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#endif
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return 0;
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}
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_rb->increment_read_idx (sizeof(MidiEventHeader));
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assert (h.size > 0);
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if (h.size > size) {
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_DEBUGPRINT("AlsaMidiIn::recv_event MIDI event too large!\n");
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_rb->increment_read_idx (h.size);
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return 0;
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}
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if (_rb->read (&data[0], h.size) != h.size) {
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_DEBUGPRINT("AlsaMidiIn::recv_event Garbled MIDI EVENT DATA!!\n");
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return 0;
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}
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if (h.time < _clock_monotonic) {
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#ifdef DEBUG_TIMING
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printf("AlsaMidiIn DEBUG: MIDI TIME < 0 %.1f spl\n", ((_clock_monotonic - h.time) / -_sample_length_us));
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#endif
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time = 0;
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} else if (h.time >= _clock_monotonic + _period_length_us ) {
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#ifdef DEBUG_TIMING
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printf("AlsaMidiIn DEBUG: MIDI TIME > PERIOD %.1f spl\n", ((h.time - _clock_monotonic) / _sample_length_us));
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#endif
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time = _samples_per_period - 1;
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} else {
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time = floor ((h.time - _clock_monotonic) / _sample_length_us);
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}
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assert(time < _samples_per_period);
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size = h.size;
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return h.size;
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}
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int
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AlsaMidiIn::queue_event (const uint64_t time, const uint8_t *data, const size_t size) {
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const uint32_t buf_size = sizeof(MidiEventHeader) + size;
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if (size == 0) {
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return -1;
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}
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if (_rb->write_space() < buf_size) {
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_DEBUGPRINT("AlsaMidiIn: ring buffer overflow\n");
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return -1;
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}
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struct MidiEventHeader h (time, size);
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_rb->write ((uint8_t*) &h, sizeof(MidiEventHeader));
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_rb->write (data, size);
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return 0;
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}
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97
libs/backends/alsa/alsa_midi.h
Normal file
97
libs/backends/alsa/alsa_midi.h
Normal file
@ -0,0 +1,97 @@
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/*
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* Copyright (C) 2014 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
|
||||
* it under the terms of the GNU General Public License as published by
|
||||
* the Free Software Foundation; either version 2 of the License, or
|
||||
* (at your option) any later version.
|
||||
*
|
||||
* This program is distributed in the hope that it will be useful,
|
||||
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
* GNU General Public License for more details.
|
||||
*
|
||||
* You should have received a copy of the GNU General Public License
|
||||
* along with this program; if not, write to the Free Software
|
||||
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
|
||||
*/
|
||||
|
||||
#ifndef __libbackend_alsa_midi_h__
|
||||
#define __libbackend_alsa_midi_h__
|
||||
|
||||
#include <stdint.h>
|
||||
#include <poll.h>
|
||||
#include <pthread.h>
|
||||
|
||||
#include "pbd/ringbuffer.h"
|
||||
#include "ardour/types.h"
|
||||
|
||||
namespace ARDOUR {
|
||||
|
||||
class AlsaMidiIO {
|
||||
public:
|
||||
AlsaMidiIO ();
|
||||
virtual ~AlsaMidiIO ();
|
||||
|
||||
int state (void) const { return _state; }
|
||||
int start ();
|
||||
int stop ();
|
||||
|
||||
void setup_timing (const size_t samples_per_period, const float samplerate);
|
||||
void sync_time(uint64_t);
|
||||
|
||||
virtual void* main_process_thread () = 0;
|
||||
|
||||
protected:
|
||||
pthread_t _main_thread;
|
||||
pthread_mutex_t _notify_mutex;
|
||||
pthread_cond_t _notify_ready;
|
||||
|
||||
int _state;
|
||||
bool _running;
|
||||
|
||||
int _npfds;
|
||||
struct pollfd *_pfds;
|
||||
|
||||
double _sample_length_us;
|
||||
double _period_length_us;
|
||||
size_t _samples_per_period;
|
||||
uint64_t _clock_monotonic;
|
||||
|
||||
struct MidiEventHeader {
|
||||
uint64_t time;
|
||||
size_t size;
|
||||
MidiEventHeader(const uint64_t t, const size_t s)
|
||||
: time(t)
|
||||
, size(s) {}
|
||||
};
|
||||
|
||||
RingBuffer<uint8_t>* _rb;
|
||||
|
||||
protected:
|
||||
virtual void init (const char *device_name, const bool input) = 0;
|
||||
|
||||
};
|
||||
|
||||
class AlsaMidiOut : virtual public AlsaMidiIO
|
||||
{
|
||||
public:
|
||||
AlsaMidiOut ();
|
||||
|
||||
int send_event (const pframes_t, const uint8_t *, const size_t);
|
||||
};
|
||||
|
||||
class AlsaMidiIn : virtual public AlsaMidiIO
|
||||
{
|
||||
public:
|
||||
AlsaMidiIn ();
|
||||
|
||||
size_t recv_event (pframes_t &, uint8_t *, size_t &);
|
||||
|
||||
protected:
|
||||
int queue_event (const uint64_t, const uint8_t *, const size_t);
|
||||
};
|
||||
|
||||
} // namespace
|
||||
|
||||
#endif
|
@ -18,11 +18,10 @@
|
||||
*/
|
||||
|
||||
#include <unistd.h>
|
||||
|
||||
#include <glibmm.h>
|
||||
|
||||
#include "select_sleep.h"
|
||||
#include "alsa_rawmidi.h"
|
||||
#include "rt_thread.h"
|
||||
|
||||
#include "pbd/error.h"
|
||||
#include "i18n.h"
|
||||
@ -40,17 +39,9 @@ using namespace ARDOUR;
|
||||
#endif
|
||||
|
||||
AlsaRawMidiIO::AlsaRawMidiIO (const char *device, const bool input)
|
||||
: _state (-1)
|
||||
, _running (false)
|
||||
: AlsaMidiIO()
|
||||
, _device (0)
|
||||
, _pfds (0)
|
||||
, _sample_length_us (1e6 / 48000.0)
|
||||
, _period_length_us (1.024e6 / 48000.0)
|
||||
, _samples_per_period (1024)
|
||||
, _rb (0)
|
||||
{
|
||||
pthread_mutex_init (&_notify_mutex, 0);
|
||||
pthread_cond_init (&_notify_ready, 0);
|
||||
init (device, input);
|
||||
}
|
||||
|
||||
@ -61,10 +52,6 @@ AlsaRawMidiIO::~AlsaRawMidiIO ()
|
||||
snd_rawmidi_close (_device);
|
||||
_device = 0;
|
||||
}
|
||||
delete _rb;
|
||||
pthread_mutex_destroy (&_notify_mutex);
|
||||
pthread_cond_destroy (&_notify_ready);
|
||||
free (_pfds);
|
||||
}
|
||||
|
||||
void
|
||||
@ -87,12 +74,6 @@ AlsaRawMidiIO::init (const char *device_name, const bool input)
|
||||
_pfds = (struct pollfd*) malloc (_npfds * sizeof(struct pollfd));
|
||||
snd_rawmidi_poll_descriptors (_device, _pfds, _npfds);
|
||||
|
||||
// MIDI (hw port) 31.25 kbaud
|
||||
// worst case here is 8192 SPP and 8KSPS for which we'd need
|
||||
// 4000 bytes sans MidiEventHeader.
|
||||
// since we're not always in sync, let's use 4096.
|
||||
_rb = new RingBuffer<uint8_t>(4096 + 4096 * sizeof(MidiEventHeader));
|
||||
|
||||
#if 0
|
||||
_state = 0;
|
||||
#else
|
||||
@ -124,121 +105,14 @@ initerr:
|
||||
return;
|
||||
}
|
||||
|
||||
static void * pthread_process (void *arg)
|
||||
{
|
||||
AlsaRawMidiIO *d = static_cast<AlsaRawMidiIO *>(arg);
|
||||
d->main_process_thread ();
|
||||
pthread_exit (0);
|
||||
return 0;
|
||||
}
|
||||
|
||||
int
|
||||
AlsaRawMidiIO::start ()
|
||||
{
|
||||
if (_realtime_pthread_create (SCHED_FIFO, -21, 100000,
|
||||
&_main_thread, pthread_process, this))
|
||||
{
|
||||
if (pthread_create (&_main_thread, NULL, pthread_process, this)) {
|
||||
PBD::error << _("AlsaRawMidiIO: Failed to create process thread.") << endmsg;
|
||||
return -1;
|
||||
} else {
|
||||
PBD::warning << _("AlsaRawMidiIO: Cannot acquire realtime permissions.") << endmsg;
|
||||
}
|
||||
}
|
||||
int timeout = 5000;
|
||||
while (!_running && --timeout > 0) { Glib::usleep (1000); }
|
||||
if (timeout == 0 || !_running) {
|
||||
return -1;
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
|
||||
int
|
||||
AlsaRawMidiIO::stop ()
|
||||
{
|
||||
void *status;
|
||||
if (!_running) {
|
||||
return 0;
|
||||
}
|
||||
|
||||
_running = false;
|
||||
|
||||
pthread_mutex_lock (&_notify_mutex);
|
||||
pthread_cond_signal (&_notify_ready);
|
||||
pthread_mutex_unlock (&_notify_mutex);
|
||||
|
||||
if (pthread_join (_main_thread, &status)) {
|
||||
PBD::error << _("AlsaRawMidiIO: Failed to terminate.") << endmsg;
|
||||
return -1;
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
|
||||
void
|
||||
AlsaRawMidiIO::setup_timing (const size_t samples_per_period, const float samplerate)
|
||||
{
|
||||
_period_length_us = (double) samples_per_period * 1e6 / samplerate;
|
||||
_sample_length_us = 1e6 / samplerate;
|
||||
_samples_per_period = samples_per_period;
|
||||
}
|
||||
|
||||
void
|
||||
AlsaRawMidiIO::sync_time (const uint64_t tme)
|
||||
{
|
||||
// TODO consider a PLL, if this turns out to be the bottleneck for jitter
|
||||
// also think about using
|
||||
// snd_pcm_status_get_tstamp() and snd_rawmidi_status_get_tstamp()
|
||||
// instead of monotonic clock.
|
||||
#ifdef DEBUG_TIMING
|
||||
double tdiff = (_clock_monotonic + _period_length_us - tme) / 1000.0;
|
||||
if (abs(tdiff) >= .05) {
|
||||
printf("AlsaRawMidiIO MJ: %.1f ms\n", tdiff);
|
||||
}
|
||||
#endif
|
||||
_clock_monotonic = tme;
|
||||
}
|
||||
|
||||
///////////////////////////////////////////////////////////////////////////////
|
||||
|
||||
// select sleeps _at most_ (compared to usleep() which sleeps at least)
|
||||
static void select_sleep (uint32_t usec) {
|
||||
if (usec <= 10) return;
|
||||
fd_set fd;
|
||||
int max_fd=0;
|
||||
struct timeval tv;
|
||||
tv.tv_sec = usec / 1000000;
|
||||
tv.tv_usec = usec % 1000000;
|
||||
FD_ZERO (&fd);
|
||||
select (max_fd, &fd, NULL, NULL, &tv);
|
||||
}
|
||||
|
||||
///////////////////////////////////////////////////////////////////////////////
|
||||
|
||||
AlsaRawMidiOut::AlsaRawMidiOut (const char *device)
|
||||
: AlsaRawMidiIO (device, false)
|
||||
, AlsaMidiOut ()
|
||||
{
|
||||
}
|
||||
|
||||
|
||||
int
|
||||
AlsaRawMidiOut::send_event (const pframes_t time, const uint8_t *data, const size_t size)
|
||||
{
|
||||
const uint32_t buf_size = sizeof (MidiEventHeader) + size;
|
||||
if (_rb->write_space() < buf_size) {
|
||||
_DEBUGPRINT("AlsaRawMidiOut: ring buffer overflow\n");
|
||||
return -1;
|
||||
}
|
||||
struct MidiEventHeader h (_clock_monotonic + time * _sample_length_us, size);
|
||||
_rb->write ((uint8_t*) &h, sizeof(MidiEventHeader));
|
||||
_rb->write (data, size);
|
||||
|
||||
if (pthread_mutex_trylock (&_notify_mutex) == 0) {
|
||||
pthread_cond_signal (&_notify_ready);
|
||||
pthread_mutex_unlock (&_notify_mutex);
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
|
||||
void *
|
||||
AlsaRawMidiOut::main_process_thread ()
|
||||
{
|
||||
@ -351,6 +225,7 @@ retry:
|
||||
|
||||
AlsaRawMidiIn::AlsaRawMidiIn (const char *device)
|
||||
: AlsaRawMidiIO (device, true)
|
||||
, AlsaMidiIn ()
|
||||
, _event(0,0)
|
||||
, _first_time(true)
|
||||
, _unbuffered_bytes(0)
|
||||
@ -360,70 +235,6 @@ AlsaRawMidiIn::AlsaRawMidiIn (const char *device)
|
||||
{
|
||||
}
|
||||
|
||||
size_t
|
||||
AlsaRawMidiIn::recv_event (pframes_t &time, uint8_t *data, size_t &size)
|
||||
{
|
||||
const uint32_t read_space = _rb->read_space();
|
||||
struct MidiEventHeader h(0,0);
|
||||
|
||||
if (read_space <= sizeof(MidiEventHeader)) {
|
||||
return 0;
|
||||
}
|
||||
|
||||
#if 1
|
||||
// check if event is in current cycle
|
||||
RingBuffer<uint8_t>::rw_vector vector;
|
||||
_rb->get_read_vector(&vector);
|
||||
if (vector.len[0] >= sizeof(MidiEventHeader)) {
|
||||
memcpy((uint8_t*)&h, vector.buf[0], sizeof(MidiEventHeader));
|
||||
} else {
|
||||
if (vector.len[0] > 0) {
|
||||
memcpy ((uint8_t*)&h, vector.buf[0], vector.len[0]);
|
||||
}
|
||||
memcpy (((uint8_t*)&h) + vector.len[0], vector.buf[1], sizeof(MidiEventHeader) - vector.len[0]);
|
||||
}
|
||||
|
||||
if (h.time >= _clock_monotonic + _period_length_us ) {
|
||||
#ifdef DEBUG_TIMING
|
||||
printf("AlsaRawMidiIn DEBUG: POSTPONE EVENT TO NEXT CYCLE: %.1f spl\n", ((h.time - _clock_monotonic) / _sample_length_us));
|
||||
#endif
|
||||
return 0;
|
||||
}
|
||||
_rb->increment_read_idx (sizeof(MidiEventHeader));
|
||||
#else
|
||||
if (_rb->read ((uint8_t*)&h, sizeof(MidiEventHeader)) != sizeof(MidiEventHeader)) {
|
||||
_DEBUGPRINT("AlsaRawMidiIn::recv_event Garbled MIDI EVENT HEADER!!\n");
|
||||
return 0;
|
||||
}
|
||||
#endif
|
||||
assert (h.size > 0);
|
||||
if (h.size > size) {
|
||||
_DEBUGPRINT("AlsaRawMidiIn::recv_event MIDI event too large!\n");
|
||||
_rb->increment_read_idx (h.size);
|
||||
return 0;
|
||||
}
|
||||
if (_rb->read (&data[0], h.size) != h.size) {
|
||||
_DEBUGPRINT("AlsaRawMidiIn::recv_event Garbled MIDI EVENT DATA!!\n");
|
||||
return 0;
|
||||
}
|
||||
if (h.time < _clock_monotonic) {
|
||||
#ifdef DEBUG_TIMING
|
||||
printf("AlsaRawMidiIn DEBUG: MIDI TIME < 0 %.1f spl\n", ((_clock_monotonic - h.time) / -_sample_length_us));
|
||||
#endif
|
||||
time = 0;
|
||||
} else if (h.time >= _clock_monotonic + _period_length_us ) {
|
||||
#ifdef DEBUG_TIMING
|
||||
printf("AlsaRawMidiIn DEBUG: MIDI TIME > PERIOD %.1f spl\n", ((h.time - _clock_monotonic) / _sample_length_us));
|
||||
#endif
|
||||
time = _samples_per_period - 1;
|
||||
} else {
|
||||
time = floor ((h.time - _clock_monotonic) / _sample_length_us);
|
||||
}
|
||||
assert(time < _samples_per_period);
|
||||
size = h.size;
|
||||
return h.size;
|
||||
}
|
||||
|
||||
void *
|
||||
AlsaRawMidiIn::main_process_thread ()
|
||||
{
|
||||
@ -485,20 +296,8 @@ AlsaRawMidiIn::main_process_thread ()
|
||||
|
||||
int
|
||||
AlsaRawMidiIn::queue_event (const uint64_t time, const uint8_t *data, const size_t size) {
|
||||
const uint32_t buf_size = sizeof(MidiEventHeader) + size;
|
||||
_event._pending = false;
|
||||
|
||||
if (size == 0) {
|
||||
return -1;
|
||||
}
|
||||
if (_rb->write_space() < buf_size) {
|
||||
_DEBUGPRINT("AlsaRawMidiIn: ring buffer overflow\n");
|
||||
return -1;
|
||||
}
|
||||
struct MidiEventHeader h (time, size);
|
||||
_rb->write ((uint8_t*) &h, sizeof(MidiEventHeader));
|
||||
_rb->write (data, size);
|
||||
return 0;
|
||||
return AlsaMidiIn::queue_event(time, data, size);
|
||||
}
|
||||
|
||||
void
|
||||
|
@ -27,75 +27,39 @@
|
||||
|
||||
#include "pbd/ringbuffer.h"
|
||||
#include "ardour/types.h"
|
||||
#include "alsa_midi.h"
|
||||
|
||||
namespace ARDOUR {
|
||||
|
||||
class AlsaRawMidiIO {
|
||||
class AlsaRawMidiIO : virtual public AlsaMidiIO {
|
||||
public:
|
||||
AlsaRawMidiIO (const char *device, const bool input);
|
||||
virtual ~AlsaRawMidiIO ();
|
||||
|
||||
int state (void) const { return _state; }
|
||||
int start ();
|
||||
int stop ();
|
||||
|
||||
void setup_timing (const size_t samples_per_period, const float samplerate);
|
||||
void sync_time(uint64_t);
|
||||
|
||||
virtual void* main_process_thread () = 0;
|
||||
|
||||
protected:
|
||||
pthread_t _main_thread;
|
||||
pthread_mutex_t _notify_mutex;
|
||||
pthread_cond_t _notify_ready;
|
||||
|
||||
int _state;
|
||||
bool _running;
|
||||
|
||||
snd_rawmidi_t *_device;
|
||||
int _npfds;
|
||||
struct pollfd *_pfds;
|
||||
|
||||
double _sample_length_us;
|
||||
double _period_length_us;
|
||||
size_t _samples_per_period;
|
||||
uint64_t _clock_monotonic;
|
||||
|
||||
struct MidiEventHeader {
|
||||
uint64_t time;
|
||||
size_t size;
|
||||
MidiEventHeader(const uint64_t t, const size_t s)
|
||||
: time(t)
|
||||
, size(s) {}
|
||||
};
|
||||
|
||||
RingBuffer<uint8_t>* _rb;
|
||||
|
||||
private:
|
||||
void init (const char *device_name, const bool input);
|
||||
|
||||
};
|
||||
|
||||
class AlsaRawMidiOut : public AlsaRawMidiIO
|
||||
class AlsaRawMidiOut : public AlsaRawMidiIO, public AlsaMidiOut
|
||||
{
|
||||
public:
|
||||
AlsaRawMidiOut (const char *device);
|
||||
|
||||
void* main_process_thread ();
|
||||
int send_event (const pframes_t, const uint8_t *, const size_t);
|
||||
};
|
||||
|
||||
class AlsaRawMidiIn : public AlsaRawMidiIO
|
||||
class AlsaRawMidiIn : public AlsaRawMidiIO, public AlsaMidiIn
|
||||
{
|
||||
public:
|
||||
AlsaRawMidiIn (const char *device);
|
||||
|
||||
void* main_process_thread ();
|
||||
|
||||
size_t recv_event (pframes_t &, uint8_t *, size_t &);
|
||||
|
||||
private:
|
||||
protected:
|
||||
int queue_event (const uint64_t, const uint8_t *, const size_t);
|
||||
private:
|
||||
void parse_events (const uint64_t, const uint8_t *, const size_t);
|
||||
bool process_byte (const uint64_t, const uint8_t);
|
||||
|
||||
|
@ -17,17 +17,20 @@
|
||||
*/
|
||||
|
||||
#include <unistd.h>
|
||||
|
||||
#include <glibmm.h>
|
||||
|
||||
#include "select_sleep.h"
|
||||
#include "alsa_sequencer.h"
|
||||
#include "rt_thread.h"
|
||||
|
||||
#include "pbd/error.h"
|
||||
#include "i18n.h"
|
||||
|
||||
using namespace ARDOUR;
|
||||
|
||||
/* max bytes per individual midi-event
|
||||
* events larger than this are ignored */
|
||||
#define MaxAlsaSeqEventSize (64)
|
||||
|
||||
#ifndef NDEBUG
|
||||
#define _DEBUGPRINT(STR) fprintf(stderr, STR);
|
||||
#else
|
||||
@ -35,17 +38,9 @@ using namespace ARDOUR;
|
||||
#endif
|
||||
|
||||
AlsaSeqMidiIO::AlsaSeqMidiIO (const char *device, const bool input)
|
||||
: _state (-1)
|
||||
, _running (false)
|
||||
: AlsaMidiIO()
|
||||
, _seq (0)
|
||||
, _pfds (0)
|
||||
, _sample_length_us (1e6 / 48000.0)
|
||||
, _period_length_us (1.024e6 / 48000.0)
|
||||
, _samples_per_period (1024)
|
||||
, _rb (0)
|
||||
{
|
||||
pthread_mutex_init (&_notify_mutex, 0);
|
||||
pthread_cond_init (&_notify_ready, 0);
|
||||
init (device, input);
|
||||
}
|
||||
|
||||
@ -55,10 +50,6 @@ AlsaSeqMidiIO::~AlsaSeqMidiIO ()
|
||||
snd_seq_close (_seq);
|
||||
_seq = 0;
|
||||
}
|
||||
delete _rb;
|
||||
pthread_mutex_destroy (&_notify_mutex);
|
||||
pthread_cond_destroy (&_notify_ready);
|
||||
free (_pfds);
|
||||
}
|
||||
|
||||
void
|
||||
@ -102,24 +93,18 @@ AlsaSeqMidiIO::init (const char *device_name, const bool input)
|
||||
|
||||
if (input) {
|
||||
if (snd_seq_connect_from (_seq, _port, port.client, port.port) < 0) {
|
||||
_DEBUGPRINT("AlsaSeqMidiIO: cannot connect port.\n");
|
||||
_DEBUGPRINT("AlsaSeqMidiIO: cannot connect input port.\n");
|
||||
goto initerr;
|
||||
}
|
||||
} else {
|
||||
if (snd_seq_connect_to (_seq, _port, port.client, port.port) < 0) {
|
||||
_DEBUGPRINT("AlsaSeqMidiIO: cannot connect port.\n");
|
||||
_DEBUGPRINT("AlsaSeqMidiIO: cannot connect output port.\n");
|
||||
goto initerr;
|
||||
}
|
||||
}
|
||||
|
||||
snd_seq_nonblock(_seq, 1);
|
||||
|
||||
// MIDI (hw port) 31.25 kbaud
|
||||
// worst case here is 8192 SPP and 8KSPS for which we'd need
|
||||
// 4000 bytes sans MidiEventHeader.
|
||||
// since we're not always in sync, let's use 4096.
|
||||
_rb = new RingBuffer<uint8_t>(4096 + 4096 * sizeof(MidiEventHeader));
|
||||
|
||||
_state = 0;
|
||||
return;
|
||||
|
||||
@ -130,123 +115,14 @@ initerr:
|
||||
return;
|
||||
}
|
||||
|
||||
static void * pthread_process (void *arg)
|
||||
{
|
||||
AlsaSeqMidiIO *d = static_cast<AlsaSeqMidiIO *>(arg);
|
||||
d->main_process_thread ();
|
||||
pthread_exit (0);
|
||||
return 0;
|
||||
}
|
||||
|
||||
int
|
||||
AlsaSeqMidiIO::start ()
|
||||
{
|
||||
if (_realtime_pthread_create (SCHED_FIFO, -21, 100000,
|
||||
&_main_thread, pthread_process, this))
|
||||
{
|
||||
if (pthread_create (&_main_thread, NULL, pthread_process, this)) {
|
||||
PBD::error << _("AlsaSeqMidiIO: Failed to create process thread.") << endmsg;
|
||||
return -1;
|
||||
} else {
|
||||
PBD::warning << _("AlsaSeqMidiIO: Cannot acquire realtime permissions.") << endmsg;
|
||||
}
|
||||
}
|
||||
int timeout = 5000;
|
||||
while (!_running && --timeout > 0) { Glib::usleep (1000); }
|
||||
if (timeout == 0 || !_running) {
|
||||
return -1;
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
|
||||
int
|
||||
AlsaSeqMidiIO::stop ()
|
||||
{
|
||||
void *status;
|
||||
if (!_running) {
|
||||
return 0;
|
||||
}
|
||||
|
||||
_running = false;
|
||||
|
||||
pthread_mutex_lock (&_notify_mutex);
|
||||
pthread_cond_signal (&_notify_ready);
|
||||
pthread_mutex_unlock (&_notify_mutex);
|
||||
|
||||
if (pthread_join (_main_thread, &status)) {
|
||||
PBD::error << _("AlsaSeqMidiIO: Failed to terminate.") << endmsg;
|
||||
return -1;
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
|
||||
void
|
||||
AlsaSeqMidiIO::setup_timing (const size_t samples_per_period, const float samplerate)
|
||||
{
|
||||
_period_length_us = (double) samples_per_period * 1e6 / samplerate;
|
||||
_sample_length_us = 1e6 / samplerate;
|
||||
_samples_per_period = samples_per_period;
|
||||
}
|
||||
|
||||
void
|
||||
AlsaSeqMidiIO::sync_time (const uint64_t tme)
|
||||
{
|
||||
// TODO consider a PLL, if this turns out to be the bottleneck for jitter
|
||||
// also think about using
|
||||
// snd_pcm_status_get_tstamp() and snd_rawmidi_status_get_tstamp()
|
||||
// instead of monotonic clock.
|
||||
#ifdef DEBUG_TIMING
|
||||
double tdiff = (_clock_monotonic + _period_length_us - tme) / 1000.0;
|
||||
if (abs(tdiff) >= .05) {
|
||||
printf("AlsaSeqMidiIO MJ: %.1f ms\n", tdiff);
|
||||
}
|
||||
#endif
|
||||
_clock_monotonic = tme;
|
||||
}
|
||||
|
||||
///////////////////////////////////////////////////////////////////////////////
|
||||
|
||||
// select sleeps _at most_ (compared to usleep() which sleeps at least)
|
||||
static void select_sleep (uint32_t usec) {
|
||||
if (usec <= 10) return;
|
||||
fd_set fd;
|
||||
int max_fd=0;
|
||||
struct timeval tv;
|
||||
tv.tv_sec = usec / 1000000;
|
||||
tv.tv_usec = usec % 1000000;
|
||||
FD_ZERO (&fd);
|
||||
select (max_fd, &fd, NULL, NULL, &tv);
|
||||
}
|
||||
|
||||
///////////////////////////////////////////////////////////////////////////////
|
||||
|
||||
AlsaSeqMidiOut::AlsaSeqMidiOut (const char *device)
|
||||
: AlsaSeqMidiIO (device, false)
|
||||
, AlsaMidiOut ()
|
||||
{
|
||||
}
|
||||
|
||||
|
||||
int
|
||||
AlsaSeqMidiOut::send_event (const pframes_t time, const uint8_t *data, const size_t size)
|
||||
{
|
||||
const uint32_t buf_size = sizeof (MidiEventHeader) + size;
|
||||
if (_rb->write_space() < buf_size) {
|
||||
_DEBUGPRINT("AlsaSeqMidiOut: ring buffer overflow\n");
|
||||
return -1;
|
||||
}
|
||||
struct MidiEventHeader h (_clock_monotonic + time * _sample_length_us, size);
|
||||
_rb->write ((uint8_t*) &h, sizeof(MidiEventHeader));
|
||||
_rb->write (data, size);
|
||||
|
||||
if (pthread_mutex_trylock (&_notify_mutex) == 0) {
|
||||
pthread_cond_signal (&_notify_ready);
|
||||
pthread_mutex_unlock (&_notify_mutex);
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
|
||||
#define MaxAlsaSeqEventSize 64
|
||||
|
||||
void *
|
||||
AlsaSeqMidiOut::main_process_thread ()
|
||||
{
|
||||
@ -353,90 +229,10 @@ retry:
|
||||
|
||||
AlsaSeqMidiIn::AlsaSeqMidiIn (const char *device)
|
||||
: AlsaSeqMidiIO (device, true)
|
||||
, AlsaMidiIn ()
|
||||
{
|
||||
}
|
||||
|
||||
size_t
|
||||
AlsaSeqMidiIn::recv_event (pframes_t &time, uint8_t *data, size_t &size)
|
||||
{
|
||||
const uint32_t read_space = _rb->read_space();
|
||||
struct MidiEventHeader h(0,0);
|
||||
|
||||
if (read_space <= sizeof(MidiEventHeader)) {
|
||||
return 0;
|
||||
}
|
||||
|
||||
#if 1
|
||||
// check if event is in current cycle
|
||||
RingBuffer<uint8_t>::rw_vector vector;
|
||||
_rb->get_read_vector(&vector);
|
||||
if (vector.len[0] >= sizeof(MidiEventHeader)) {
|
||||
memcpy((uint8_t*)&h, vector.buf[0], sizeof(MidiEventHeader));
|
||||
} else {
|
||||
if (vector.len[0] > 0) {
|
||||
memcpy ((uint8_t*)&h, vector.buf[0], vector.len[0]);
|
||||
}
|
||||
memcpy (((uint8_t*)&h) + vector.len[0], vector.buf[1], sizeof(MidiEventHeader) - vector.len[0]);
|
||||
}
|
||||
|
||||
if (h.time >= _clock_monotonic + _period_length_us ) {
|
||||
#ifdef DEBUG_TIMING
|
||||
printf("AlsaSeqMidiIn DEBUG: POSTPONE EVENT TO NEXT CYCLE: %.1f spl\n", ((h.time - _clock_monotonic) / _sample_length_us));
|
||||
#endif
|
||||
return 0;
|
||||
}
|
||||
_rb->increment_read_idx (sizeof(MidiEventHeader));
|
||||
#else
|
||||
if (_rb->read ((uint8_t*)&h, sizeof(MidiEventHeader)) != sizeof(MidiEventHeader)) {
|
||||
_DEBUGPRINT("AlsaSeqMidiIn::recv_event Garbled MIDI EVENT HEADER!!\n");
|
||||
return 0;
|
||||
}
|
||||
#endif
|
||||
assert (h.size > 0);
|
||||
if (h.size > size) {
|
||||
_DEBUGPRINT("AlsaSeqMidiIn::recv_event MIDI event too large!\n");
|
||||
_rb->increment_read_idx (h.size);
|
||||
return 0;
|
||||
}
|
||||
if (_rb->read (&data[0], h.size) != h.size) {
|
||||
_DEBUGPRINT("AlsaSeqMidiIn::recv_event Garbled MIDI EVENT DATA!!\n");
|
||||
return 0;
|
||||
}
|
||||
if (h.time < _clock_monotonic) {
|
||||
#ifdef DEBUG_TIMING
|
||||
printf("AlsaSeqMidiIn DEBUG: MIDI TIME < 0 %.1f spl\n", ((_clock_monotonic - h.time) / -_sample_length_us));
|
||||
#endif
|
||||
time = 0;
|
||||
} else if (h.time >= _clock_monotonic + _period_length_us ) {
|
||||
#ifdef DEBUG_TIMING
|
||||
printf("AlsaSeqMidiIn DEBUG: MIDI TIME > PERIOD %.1f spl\n", ((h.time - _clock_monotonic) / _sample_length_us));
|
||||
#endif
|
||||
time = _samples_per_period - 1;
|
||||
} else {
|
||||
time = floor ((h.time - _clock_monotonic) / _sample_length_us);
|
||||
}
|
||||
assert(time < _samples_per_period);
|
||||
size = h.size;
|
||||
return h.size;
|
||||
}
|
||||
|
||||
int
|
||||
AlsaSeqMidiIn::queue_event (const uint64_t time, const uint8_t *data, const size_t size) {
|
||||
const uint32_t buf_size = sizeof(MidiEventHeader) + size;
|
||||
|
||||
if (size == 0) {
|
||||
return -1;
|
||||
}
|
||||
if (_rb->write_space() < buf_size) {
|
||||
_DEBUGPRINT("AlsaSeqMidiIn: ring buffer overflow\n");
|
||||
return -1;
|
||||
}
|
||||
struct MidiEventHeader h (time, size);
|
||||
_rb->write ((uint8_t*) &h, sizeof(MidiEventHeader));
|
||||
_rb->write (data, size);
|
||||
return 0;
|
||||
}
|
||||
|
||||
void *
|
||||
AlsaSeqMidiIn::main_process_thread ()
|
||||
{
|
||||
|
@ -27,76 +27,36 @@
|
||||
|
||||
#include "pbd/ringbuffer.h"
|
||||
#include "ardour/types.h"
|
||||
#include "alsa_midi.h"
|
||||
|
||||
namespace ARDOUR {
|
||||
|
||||
class AlsaSeqMidiIO {
|
||||
class AlsaSeqMidiIO : virtual public AlsaMidiIO {
|
||||
public:
|
||||
AlsaSeqMidiIO (const char *port_name, const bool input);
|
||||
virtual ~AlsaSeqMidiIO ();
|
||||
|
||||
int state (void) const { return _state; }
|
||||
int start ();
|
||||
int stop ();
|
||||
|
||||
void setup_timing (const size_t samples_per_period, const float samplerate);
|
||||
void sync_time(uint64_t);
|
||||
|
||||
virtual void* main_process_thread () = 0;
|
||||
|
||||
protected:
|
||||
pthread_t _main_thread;
|
||||
pthread_mutex_t _notify_mutex;
|
||||
pthread_cond_t _notify_ready;
|
||||
|
||||
int _state;
|
||||
bool _running;
|
||||
|
||||
snd_seq_t *_seq;
|
||||
//snd_seq_addr_t _port;
|
||||
int _port;
|
||||
|
||||
int _npfds;
|
||||
struct pollfd *_pfds;
|
||||
|
||||
double _sample_length_us;
|
||||
double _period_length_us;
|
||||
size_t _samples_per_period;
|
||||
uint64_t _clock_monotonic;
|
||||
|
||||
struct MidiEventHeader {
|
||||
uint64_t time;
|
||||
size_t size;
|
||||
MidiEventHeader(const uint64_t t, const size_t s)
|
||||
: time(t)
|
||||
, size(s) {}
|
||||
};
|
||||
|
||||
RingBuffer<uint8_t>* _rb;
|
||||
|
||||
private:
|
||||
void init (const char *device_name, const bool input);
|
||||
};
|
||||
|
||||
class AlsaSeqMidiOut : public AlsaSeqMidiIO
|
||||
class AlsaSeqMidiOut : public AlsaSeqMidiIO, public AlsaMidiOut
|
||||
{
|
||||
public:
|
||||
AlsaSeqMidiOut (const char *port_name);
|
||||
|
||||
void* main_process_thread ();
|
||||
int send_event (const pframes_t, const uint8_t *, const size_t);
|
||||
};
|
||||
|
||||
class AlsaSeqMidiIn : public AlsaSeqMidiIO
|
||||
class AlsaSeqMidiIn : public AlsaSeqMidiIO, public AlsaMidiIn
|
||||
{
|
||||
public:
|
||||
AlsaSeqMidiIn (const char *port_name);
|
||||
|
||||
void* main_process_thread ();
|
||||
size_t recv_event (pframes_t &, uint8_t *, size_t &);
|
||||
|
||||
private:
|
||||
int queue_event (const uint64_t, const uint8_t *, const size_t);
|
||||
};
|
||||
|
||||
} // namespace
|
||||
|
35
libs/backends/alsa/select_sleep.h
Normal file
35
libs/backends/alsa/select_sleep.h
Normal file
@ -0,0 +1,35 @@
|
||||
/*
|
||||
* Copyright (C) 2004,2014 Robin Gareus <robin@gareus.org>
|
||||
*
|
||||
* This program is free software; you can redistribute it and/or modify
|
||||
* it under the terms of the GNU General Public License as published by
|
||||
* the Free Software Foundation; either version 2 of the License, or
|
||||
* (at your option) any later version.
|
||||
*
|
||||
* This program is distributed in the hope that it will be useful,
|
||||
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
* GNU General Public License for more details.
|
||||
*
|
||||
* You should have received a copy of the GNU General Public License
|
||||
* along with this program; if not, write to the Free Software
|
||||
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
|
||||
*/
|
||||
|
||||
#include <stdint.h>
|
||||
#include <sys/select.h>
|
||||
|
||||
/* select() sleeps _at most_ a given time.
|
||||
* (compared to usleep() or nanosleep() which sleep at least a given time)
|
||||
*/
|
||||
static void select_sleep (uint64_t usec) {
|
||||
if (usec <= 10) return;
|
||||
fd_set fd;
|
||||
int max_fd=0;
|
||||
struct timeval tv;
|
||||
tv.tv_sec = usec / 1000000;
|
||||
tv.tv_usec = usec % 1000000;
|
||||
FD_ZERO (&fd);
|
||||
select (max_fd, &fd, NULL, NULL, &tv);
|
||||
// on Linux, tv reflects the actual time slept.
|
||||
}
|
@ -25,6 +25,7 @@ def build(bld):
|
||||
obj = bld(features = 'cxx cxxshlib')
|
||||
obj.source = [
|
||||
'alsa_audiobackend.cc',
|
||||
'alsa_midi.cc',
|
||||
'alsa_rawmidi.cc',
|
||||
'alsa_sequencer.cc',
|
||||
'zita-alsa-pcmi.cc',
|
||||
|
Loading…
Reference in New Issue
Block a user