🛠️🐜 Antkeeper superbuild with dependencies included
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739 lines
24 KiB
739 lines
24 KiB
/**
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* OpenAL cross platform audio library
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* Copyright (C) 1999-2007 by authors.
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library 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 GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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* Or go to http://www.gnu.org/copyleft/lgpl.html
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*/
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#include "config.h"
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#include "jack.h"
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#include <cstdlib>
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#include <cstdio>
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#include <cstring>
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#include <memory.h>
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#include <array>
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#include <thread>
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#include <functional>
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#include "alc/alconfig.h"
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#include "alnumeric.h"
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#include "core/device.h"
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#include "core/helpers.h"
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#include "core/logging.h"
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#include "dynload.h"
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#include "ringbuffer.h"
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#include "threads.h"
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#include <jack/jack.h>
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#include <jack/ringbuffer.h>
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namespace {
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#ifdef HAVE_DYNLOAD
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#define JACK_FUNCS(MAGIC) \
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MAGIC(jack_client_open); \
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MAGIC(jack_client_close); \
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MAGIC(jack_client_name_size); \
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MAGIC(jack_get_client_name); \
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MAGIC(jack_connect); \
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MAGIC(jack_activate); \
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MAGIC(jack_deactivate); \
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MAGIC(jack_port_register); \
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MAGIC(jack_port_unregister); \
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MAGIC(jack_port_get_buffer); \
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MAGIC(jack_port_name); \
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MAGIC(jack_get_ports); \
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MAGIC(jack_free); \
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MAGIC(jack_get_sample_rate); \
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MAGIC(jack_set_error_function); \
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MAGIC(jack_set_process_callback); \
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MAGIC(jack_set_buffer_size_callback); \
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MAGIC(jack_set_buffer_size); \
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MAGIC(jack_get_buffer_size);
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void *jack_handle;
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#define MAKE_FUNC(f) decltype(f) * p##f
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JACK_FUNCS(MAKE_FUNC)
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decltype(jack_error_callback) * pjack_error_callback;
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#undef MAKE_FUNC
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#ifndef IN_IDE_PARSER
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#define jack_client_open pjack_client_open
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#define jack_client_close pjack_client_close
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#define jack_client_name_size pjack_client_name_size
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#define jack_get_client_name pjack_get_client_name
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#define jack_connect pjack_connect
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#define jack_activate pjack_activate
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#define jack_deactivate pjack_deactivate
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#define jack_port_register pjack_port_register
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#define jack_port_unregister pjack_port_unregister
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#define jack_port_get_buffer pjack_port_get_buffer
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#define jack_port_name pjack_port_name
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#define jack_get_ports pjack_get_ports
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#define jack_free pjack_free
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#define jack_get_sample_rate pjack_get_sample_rate
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#define jack_set_error_function pjack_set_error_function
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#define jack_set_process_callback pjack_set_process_callback
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#define jack_set_buffer_size_callback pjack_set_buffer_size_callback
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#define jack_set_buffer_size pjack_set_buffer_size
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#define jack_get_buffer_size pjack_get_buffer_size
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#define jack_error_callback (*pjack_error_callback)
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#endif
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#endif
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constexpr char JackDefaultAudioType[] = JACK_DEFAULT_AUDIO_TYPE;
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jack_options_t ClientOptions = JackNullOption;
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bool jack_load()
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{
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bool error{false};
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#ifdef HAVE_DYNLOAD
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if(!jack_handle)
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{
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std::string missing_funcs;
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#ifdef _WIN32
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#define JACKLIB "libjack.dll"
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#else
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#define JACKLIB "libjack.so.0"
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#endif
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jack_handle = LoadLib(JACKLIB);
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if(!jack_handle)
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{
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WARN("Failed to load %s\n", JACKLIB);
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return false;
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}
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error = false;
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#define LOAD_FUNC(f) do { \
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p##f = reinterpret_cast<decltype(p##f)>(GetSymbol(jack_handle, #f)); \
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if(p##f == nullptr) { \
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error = true; \
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missing_funcs += "\n" #f; \
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} \
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} while(0)
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JACK_FUNCS(LOAD_FUNC);
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#undef LOAD_FUNC
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/* Optional symbols. These don't exist in all versions of JACK. */
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#define LOAD_SYM(f) p##f = reinterpret_cast<decltype(p##f)>(GetSymbol(jack_handle, #f))
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LOAD_SYM(jack_error_callback);
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#undef LOAD_SYM
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if(error)
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{
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WARN("Missing expected functions:%s\n", missing_funcs.c_str());
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CloseLib(jack_handle);
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jack_handle = nullptr;
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}
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}
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#endif
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return !error;
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}
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struct JackDeleter {
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void operator()(void *ptr) { jack_free(ptr); }
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};
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using JackPortsPtr = std::unique_ptr<const char*[],JackDeleter>;
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struct DeviceEntry {
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std::string mName;
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std::string mPattern;
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};
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al::vector<DeviceEntry> PlaybackList;
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void EnumerateDevices(jack_client_t *client, al::vector<DeviceEntry> &list)
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{
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std::remove_reference_t<decltype(list)>{}.swap(list);
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if(JackPortsPtr ports{jack_get_ports(client, nullptr, JackDefaultAudioType, JackPortIsInput)})
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{
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for(size_t i{0};ports[i];++i)
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{
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const char *sep{std::strchr(ports[i], ':')};
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if(!sep || ports[i] == sep) continue;
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const al::span<const char> portdev{ports[i], sep};
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auto check_name = [portdev](const DeviceEntry &entry) -> bool
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{
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const size_t len{portdev.size()};
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return entry.mName.length() == len
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&& entry.mName.compare(0, len, portdev.data(), len) == 0;
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};
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if(std::find_if(list.cbegin(), list.cend(), check_name) != list.cend())
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continue;
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std::string name{portdev.data(), portdev.size()};
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list.emplace_back(DeviceEntry{name, name+":"});
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const auto &entry = list.back();
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TRACE("Got device: %s = %s\n", entry.mName.c_str(), entry.mPattern.c_str());
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}
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/* There are ports but couldn't get device names from them. Add a
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* generic entry.
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*/
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if(ports[0] && list.empty())
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{
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WARN("No device names found in available ports, adding a generic name.\n");
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list.emplace_back(DeviceEntry{"JACK", ""});
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}
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}
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if(auto listopt = ConfigValueStr(nullptr, "jack", "custom-devices"))
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{
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for(size_t strpos{0};strpos < listopt->size();)
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{
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size_t nextpos{listopt->find(';', strpos)};
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size_t seppos{listopt->find('=', strpos)};
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if(seppos >= nextpos || seppos == strpos)
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{
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const std::string entry{listopt->substr(strpos, nextpos-strpos)};
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ERR("Invalid device entry: \"%s\"\n", entry.c_str());
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if(nextpos != std::string::npos) ++nextpos;
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strpos = nextpos;
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continue;
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}
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const al::span<const char> name{listopt->data()+strpos, seppos-strpos};
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const al::span<const char> pattern{listopt->data()+(seppos+1),
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std::min(nextpos, listopt->size())-(seppos+1)};
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/* Check if this custom pattern already exists in the list. */
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auto check_pattern = [pattern](const DeviceEntry &entry) -> bool
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{
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const size_t len{pattern.size()};
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return entry.mPattern.length() == len
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&& entry.mPattern.compare(0, len, pattern.data(), len) == 0;
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};
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auto itemmatch = std::find_if(list.begin(), list.end(), check_pattern);
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if(itemmatch != list.end())
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{
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/* If so, replace the name with this custom one. */
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itemmatch->mName.assign(name.data(), name.size());
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TRACE("Customized device name: %s = %s\n", itemmatch->mName.c_str(),
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itemmatch->mPattern.c_str());
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}
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else
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{
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/* Otherwise, add a new device entry. */
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list.emplace_back(DeviceEntry{std::string{name.data(), name.size()},
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std::string{pattern.data(), pattern.size()}});
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const auto &entry = list.back();
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TRACE("Got custom device: %s = %s\n", entry.mName.c_str(), entry.mPattern.c_str());
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}
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if(nextpos != std::string::npos) ++nextpos;
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strpos = nextpos;
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}
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}
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if(list.size() > 1)
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{
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/* Rename entries that have matching names, by appending '#2', '#3',
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* etc, as needed.
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*/
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for(auto curitem = list.begin()+1;curitem != list.end();++curitem)
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{
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auto check_match = [curitem](const DeviceEntry &entry) -> bool
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{ return entry.mName == curitem->mName; };
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if(std::find_if(list.begin(), curitem, check_match) != curitem)
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{
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std::string name{curitem->mName};
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size_t count{1};
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auto check_name = [&name](const DeviceEntry &entry) -> bool
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{ return entry.mName == name; };
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do {
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name = curitem->mName;
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name += " #";
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name += std::to_string(++count);
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} while(std::find_if(list.begin(), curitem, check_name) != curitem);
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curitem->mName = std::move(name);
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}
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}
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}
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}
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struct JackPlayback final : public BackendBase {
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JackPlayback(DeviceBase *device) noexcept : BackendBase{device} { }
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~JackPlayback() override;
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int processRt(jack_nframes_t numframes) noexcept;
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static int processRtC(jack_nframes_t numframes, void *arg) noexcept
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{ return static_cast<JackPlayback*>(arg)->processRt(numframes); }
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int process(jack_nframes_t numframes) noexcept;
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static int processC(jack_nframes_t numframes, void *arg) noexcept
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{ return static_cast<JackPlayback*>(arg)->process(numframes); }
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int mixerProc();
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void open(const char *name) override;
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bool reset() override;
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void start() override;
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void stop() override;
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ClockLatency getClockLatency() override;
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std::string mPortPattern;
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jack_client_t *mClient{nullptr};
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std::array<jack_port_t*,MAX_OUTPUT_CHANNELS> mPort{};
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std::mutex mMutex;
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std::atomic<bool> mPlaying{false};
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bool mRTMixing{false};
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RingBufferPtr mRing;
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al::semaphore mSem;
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std::atomic<bool> mKillNow{true};
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std::thread mThread;
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DEF_NEWDEL(JackPlayback)
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};
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JackPlayback::~JackPlayback()
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{
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if(!mClient)
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return;
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auto unregister_port = [this](jack_port_t *port) -> void
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{ if(port) jack_port_unregister(mClient, port); };
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std::for_each(mPort.begin(), mPort.end(), unregister_port);
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mPort.fill(nullptr);
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jack_client_close(mClient);
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mClient = nullptr;
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}
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int JackPlayback::processRt(jack_nframes_t numframes) noexcept
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{
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std::array<jack_default_audio_sample_t*,MAX_OUTPUT_CHANNELS> out;
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size_t numchans{0};
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for(auto port : mPort)
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{
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if(!port || numchans == mDevice->RealOut.Buffer.size())
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break;
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out[numchans++] = static_cast<float*>(jack_port_get_buffer(port, numframes));
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}
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if LIKELY(mPlaying.load(std::memory_order_acquire))
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mDevice->renderSamples({out.data(), numchans}, static_cast<uint>(numframes));
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else
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{
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auto clear_buf = [numframes](float *outbuf) -> void
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{ std::fill_n(outbuf, numframes, 0.0f); };
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std::for_each(out.begin(), out.begin()+numchans, clear_buf);
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}
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return 0;
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}
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int JackPlayback::process(jack_nframes_t numframes) noexcept
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{
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std::array<jack_default_audio_sample_t*,MAX_OUTPUT_CHANNELS> out;
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size_t numchans{0};
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for(auto port : mPort)
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{
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if(!port) break;
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out[numchans++] = static_cast<float*>(jack_port_get_buffer(port, numframes));
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}
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jack_nframes_t total{0};
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if LIKELY(mPlaying.load(std::memory_order_acquire))
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{
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auto data = mRing->getReadVector();
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jack_nframes_t todo{minu(numframes, static_cast<uint>(data.first.len))};
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auto write_first = [&data,numchans,todo](float *outbuf) -> float*
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{
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const float *RESTRICT in = reinterpret_cast<float*>(data.first.buf);
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auto deinterlace_input = [&in,numchans]() noexcept -> float
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{
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float ret{*in};
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in += numchans;
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return ret;
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};
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std::generate_n(outbuf, todo, deinterlace_input);
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data.first.buf += sizeof(float);
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return outbuf + todo;
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};
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std::transform(out.begin(), out.begin()+numchans, out.begin(), write_first);
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total += todo;
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todo = minu(numframes-total, static_cast<uint>(data.second.len));
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if(todo > 0)
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{
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auto write_second = [&data,numchans,todo](float *outbuf) -> float*
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{
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const float *RESTRICT in = reinterpret_cast<float*>(data.second.buf);
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auto deinterlace_input = [&in,numchans]() noexcept -> float
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{
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float ret{*in};
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in += numchans;
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return ret;
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};
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std::generate_n(outbuf, todo, deinterlace_input);
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data.second.buf += sizeof(float);
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return outbuf + todo;
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};
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std::transform(out.begin(), out.begin()+numchans, out.begin(), write_second);
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total += todo;
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}
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mRing->readAdvance(total);
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mSem.post();
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}
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if(numframes > total)
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{
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const jack_nframes_t todo{numframes - total};
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auto clear_buf = [todo](float *outbuf) -> void { std::fill_n(outbuf, todo, 0.0f); };
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std::for_each(out.begin(), out.begin()+numchans, clear_buf);
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}
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return 0;
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}
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int JackPlayback::mixerProc()
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{
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SetRTPriority();
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althrd_setname(MIXER_THREAD_NAME);
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const size_t frame_step{mDevice->channelsFromFmt()};
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while(!mKillNow.load(std::memory_order_acquire)
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&& mDevice->Connected.load(std::memory_order_acquire))
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{
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if(mRing->writeSpace() < mDevice->UpdateSize)
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{
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mSem.wait();
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continue;
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}
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auto data = mRing->getWriteVector();
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size_t todo{data.first.len + data.second.len};
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todo -= todo%mDevice->UpdateSize;
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const auto len1 = static_cast<uint>(minz(data.first.len, todo));
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const auto len2 = static_cast<uint>(minz(data.second.len, todo-len1));
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std::lock_guard<std::mutex> _{mMutex};
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mDevice->renderSamples(data.first.buf, len1, frame_step);
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if(len2 > 0)
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mDevice->renderSamples(data.second.buf, len2, frame_step);
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mRing->writeAdvance(todo);
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}
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return 0;
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}
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void JackPlayback::open(const char *name)
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{
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if(!mClient)
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{
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const PathNamePair &binname = GetProcBinary();
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const char *client_name{binname.fname.empty() ? "alsoft" : binname.fname.c_str()};
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jack_status_t status;
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mClient = jack_client_open(client_name, ClientOptions, &status, nullptr);
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if(mClient == nullptr)
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throw al::backend_exception{al::backend_error::DeviceError,
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"Failed to open client connection: 0x%02x", status};
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if((status&JackServerStarted))
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TRACE("JACK server started\n");
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if((status&JackNameNotUnique))
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{
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client_name = jack_get_client_name(mClient);
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TRACE("Client name not unique, got '%s' instead\n", client_name);
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}
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}
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if(PlaybackList.empty())
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EnumerateDevices(mClient, PlaybackList);
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if(!name && !PlaybackList.empty())
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{
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name = PlaybackList[0].mName.c_str();
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mPortPattern = PlaybackList[0].mPattern;
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}
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else
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{
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auto check_name = [name](const DeviceEntry &entry) -> bool
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{ return entry.mName == name; };
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auto iter = std::find_if(PlaybackList.cbegin(), PlaybackList.cend(), check_name);
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if(iter == PlaybackList.cend())
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throw al::backend_exception{al::backend_error::NoDevice,
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"Device name \"%s\" not found", name?name:""};
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mPortPattern = iter->mPattern;
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}
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mRTMixing = GetConfigValueBool(name, "jack", "rt-mix", 1);
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jack_set_process_callback(mClient,
|
|
mRTMixing ? &JackPlayback::processRtC : &JackPlayback::processC, this);
|
|
|
|
mDevice->DeviceName = name;
|
|
}
|
|
|
|
bool JackPlayback::reset()
|
|
{
|
|
auto unregister_port = [this](jack_port_t *port) -> void
|
|
{ if(port) jack_port_unregister(mClient, port); };
|
|
std::for_each(mPort.begin(), mPort.end(), unregister_port);
|
|
mPort.fill(nullptr);
|
|
|
|
/* Ignore the requested buffer metrics and just keep one JACK-sized buffer
|
|
* ready for when requested.
|
|
*/
|
|
mDevice->Frequency = jack_get_sample_rate(mClient);
|
|
mDevice->UpdateSize = jack_get_buffer_size(mClient);
|
|
if(mRTMixing)
|
|
{
|
|
/* Assume only two periods when directly mixing. Should try to query
|
|
* the total port latency when connected.
|
|
*/
|
|
mDevice->BufferSize = mDevice->UpdateSize * 2;
|
|
}
|
|
else
|
|
{
|
|
const char *devname{mDevice->DeviceName.c_str()};
|
|
uint bufsize{ConfigValueUInt(devname, "jack", "buffer-size").value_or(mDevice->UpdateSize)};
|
|
bufsize = maxu(NextPowerOf2(bufsize), mDevice->UpdateSize);
|
|
mDevice->BufferSize = bufsize + mDevice->UpdateSize;
|
|
}
|
|
|
|
/* Force 32-bit float output. */
|
|
mDevice->FmtType = DevFmtFloat;
|
|
|
|
int port_num{0};
|
|
auto ports_end = mPort.begin() + mDevice->channelsFromFmt();
|
|
auto bad_port = mPort.begin();
|
|
while(bad_port != ports_end)
|
|
{
|
|
std::string name{"channel_" + std::to_string(++port_num)};
|
|
*bad_port = jack_port_register(mClient, name.c_str(), JackDefaultAudioType,
|
|
JackPortIsOutput | JackPortIsTerminal, 0);
|
|
if(!*bad_port) break;
|
|
++bad_port;
|
|
}
|
|
if(bad_port != ports_end)
|
|
{
|
|
ERR("Failed to register enough JACK ports for %s output\n",
|
|
DevFmtChannelsString(mDevice->FmtChans));
|
|
if(bad_port == mPort.begin()) return false;
|
|
|
|
if(bad_port == mPort.begin()+1)
|
|
mDevice->FmtChans = DevFmtMono;
|
|
else
|
|
{
|
|
ports_end = mPort.begin()+2;
|
|
while(bad_port != ports_end)
|
|
{
|
|
jack_port_unregister(mClient, *(--bad_port));
|
|
*bad_port = nullptr;
|
|
}
|
|
mDevice->FmtChans = DevFmtStereo;
|
|
}
|
|
}
|
|
|
|
setDefaultChannelOrder();
|
|
|
|
return true;
|
|
}
|
|
|
|
void JackPlayback::start()
|
|
{
|
|
if(jack_activate(mClient))
|
|
throw al::backend_exception{al::backend_error::DeviceError, "Failed to activate client"};
|
|
|
|
const char *devname{mDevice->DeviceName.c_str()};
|
|
if(ConfigValueBool(devname, "jack", "connect-ports").value_or(true))
|
|
{
|
|
JackPortsPtr pnames{jack_get_ports(mClient, mPortPattern.c_str(), JackDefaultAudioType,
|
|
JackPortIsInput)};
|
|
if(!pnames)
|
|
{
|
|
jack_deactivate(mClient);
|
|
throw al::backend_exception{al::backend_error::DeviceError, "No playback ports found"};
|
|
}
|
|
|
|
for(size_t i{0};i < al::size(mPort) && mPort[i];++i)
|
|
{
|
|
if(!pnames[i])
|
|
{
|
|
ERR("No physical playback port for \"%s\"\n", jack_port_name(mPort[i]));
|
|
break;
|
|
}
|
|
if(jack_connect(mClient, jack_port_name(mPort[i]), pnames[i]))
|
|
ERR("Failed to connect output port \"%s\" to \"%s\"\n", jack_port_name(mPort[i]),
|
|
pnames[i]);
|
|
}
|
|
}
|
|
|
|
/* Reconfigure buffer metrics in case the server changed it since the reset
|
|
* (it won't change again after jack_activate), then allocate the ring
|
|
* buffer with the appropriate size.
|
|
*/
|
|
mDevice->Frequency = jack_get_sample_rate(mClient);
|
|
mDevice->UpdateSize = jack_get_buffer_size(mClient);
|
|
mDevice->BufferSize = mDevice->UpdateSize * 2;
|
|
|
|
mRing = nullptr;
|
|
if(mRTMixing)
|
|
mPlaying.store(true, std::memory_order_release);
|
|
else
|
|
{
|
|
uint bufsize{ConfigValueUInt(devname, "jack", "buffer-size").value_or(mDevice->UpdateSize)};
|
|
bufsize = maxu(NextPowerOf2(bufsize), mDevice->UpdateSize);
|
|
mDevice->BufferSize = bufsize + mDevice->UpdateSize;
|
|
|
|
mRing = RingBuffer::Create(bufsize, mDevice->frameSizeFromFmt(), true);
|
|
|
|
try {
|
|
mPlaying.store(true, std::memory_order_release);
|
|
mKillNow.store(false, std::memory_order_release);
|
|
mThread = std::thread{std::mem_fn(&JackPlayback::mixerProc), this};
|
|
}
|
|
catch(std::exception& e) {
|
|
jack_deactivate(mClient);
|
|
mPlaying.store(false, std::memory_order_release);
|
|
throw al::backend_exception{al::backend_error::DeviceError,
|
|
"Failed to start mixing thread: %s", e.what()};
|
|
}
|
|
}
|
|
}
|
|
|
|
void JackPlayback::stop()
|
|
{
|
|
if(mPlaying.load(std::memory_order_acquire))
|
|
{
|
|
mKillNow.store(true, std::memory_order_release);
|
|
if(mThread.joinable())
|
|
{
|
|
mSem.post();
|
|
mThread.join();
|
|
}
|
|
|
|
jack_deactivate(mClient);
|
|
mPlaying.store(false, std::memory_order_release);
|
|
}
|
|
}
|
|
|
|
|
|
ClockLatency JackPlayback::getClockLatency()
|
|
{
|
|
ClockLatency ret;
|
|
|
|
std::lock_guard<std::mutex> _{mMutex};
|
|
ret.ClockTime = GetDeviceClockTime(mDevice);
|
|
ret.Latency = std::chrono::seconds{mRing ? mRing->readSpace() : mDevice->UpdateSize};
|
|
ret.Latency /= mDevice->Frequency;
|
|
|
|
return ret;
|
|
}
|
|
|
|
|
|
void jack_msg_handler(const char *message)
|
|
{
|
|
WARN("%s\n", message);
|
|
}
|
|
|
|
} // namespace
|
|
|
|
bool JackBackendFactory::init()
|
|
{
|
|
if(!jack_load())
|
|
return false;
|
|
|
|
if(!GetConfigValueBool(nullptr, "jack", "spawn-server", 0))
|
|
ClientOptions = static_cast<jack_options_t>(ClientOptions | JackNoStartServer);
|
|
|
|
const PathNamePair &binname = GetProcBinary();
|
|
const char *client_name{binname.fname.empty() ? "alsoft" : binname.fname.c_str()};
|
|
|
|
void (*old_error_cb)(const char*){&jack_error_callback ? jack_error_callback : nullptr};
|
|
jack_set_error_function(jack_msg_handler);
|
|
jack_status_t status;
|
|
jack_client_t *client{jack_client_open(client_name, ClientOptions, &status, nullptr)};
|
|
jack_set_error_function(old_error_cb);
|
|
if(!client)
|
|
{
|
|
WARN("jack_client_open() failed, 0x%02x\n", status);
|
|
if((status&JackServerFailed) && !(ClientOptions&JackNoStartServer))
|
|
ERR("Unable to connect to JACK server\n");
|
|
return false;
|
|
}
|
|
|
|
jack_client_close(client);
|
|
return true;
|
|
}
|
|
|
|
bool JackBackendFactory::querySupport(BackendType type)
|
|
{ return (type == BackendType::Playback); }
|
|
|
|
std::string JackBackendFactory::probe(BackendType type)
|
|
{
|
|
std::string outnames;
|
|
auto append_name = [&outnames](const DeviceEntry &entry) -> void
|
|
{
|
|
/* Includes null char. */
|
|
outnames.append(entry.mName.c_str(), entry.mName.length()+1);
|
|
};
|
|
|
|
const PathNamePair &binname = GetProcBinary();
|
|
const char *client_name{binname.fname.empty() ? "alsoft" : binname.fname.c_str()};
|
|
jack_status_t status;
|
|
switch(type)
|
|
{
|
|
case BackendType::Playback:
|
|
if(jack_client_t *client{jack_client_open(client_name, ClientOptions, &status, nullptr)})
|
|
{
|
|
EnumerateDevices(client, PlaybackList);
|
|
jack_client_close(client);
|
|
}
|
|
else
|
|
WARN("jack_client_open() failed, 0x%02x\n", status);
|
|
std::for_each(PlaybackList.cbegin(), PlaybackList.cend(), append_name);
|
|
break;
|
|
case BackendType::Capture:
|
|
break;
|
|
}
|
|
return outnames;
|
|
}
|
|
|
|
BackendPtr JackBackendFactory::createBackend(DeviceBase *device, BackendType type)
|
|
{
|
|
if(type == BackendType::Playback)
|
|
return BackendPtr{new JackPlayback{device}};
|
|
return nullptr;
|
|
}
|
|
|
|
BackendFactory &JackBackendFactory::getFactory()
|
|
{
|
|
static JackBackendFactory factory{};
|
|
return factory;
|
|
}
|