问题描述
我开始使用 jackaudio 的 api 在 Windows 10 中使用 C++ 开发一个简单的吉他循环器。我不确定是否应该使用 API 函数来实现启动和关闭服务器，但由于我发现使用单个命令启动服务器和设置参数都很方便，因此我为它制作了一个脚本。
ECHO HELLO JACK!
cd C:\Program Files\JACK2
jackd.exe -S -X winmme -v -r -t10000 -dportaudio -d"ASIO::ASIO4ALL v2" -r44100 -p512
:: /jackd.exe -S -X winmme -v -t10000 -dportaudio -d"ASIO::Komplete Audio 6" -r44100 -p512 this is for when audio interface is selected. Not used in this script.
PAUSE
在开发过程中，测试我的代码的方式是编译它，在开始运行它之前，我必须先启动服务器，在大多数情况下我更喜欢使用 qjackctl 来完成它。然而，这种方式被证明是容易出错的，因为有很多问题 发生，特别是当“适当的方式 关闭服务器”进来。例如，通过 qjackctl 停止服务器强制我 运行程序正常退出，但关闭我正在运行的程序 没有停止服务器会破坏插孔音频行为，即。 qjackctl 有时会挂起、崩溃，即使我重新启动计算机或重新安装 jack 也无法解决问题。
日志窗口消息如下...
12:19:37.459 JACK was started with PID=8044.
jackdmp 1.9.17
copyright 2001-2005 Paul Davis and others.
copyright 2004-2016 Grame.
copyright 2016-2021 Filipe Coelho.
jackdmp comes with ABSOLUTELY NO WARRANTY
This is free software,and you are welcome to redistribute it
under certain conditions; see the file copYING for details
Drivers/internals found in : C:\Program Files\JACK2
Drivers/internals found in : C:\Program Files\JACK2
JACK server starting in realtime mode with priority 10
self-connect-mode is "Don't restrict self connect requests"
...然后它会停留在那里，有时会在 20 到 30 秒后（有些不会——如果永远冻结在那里。）它会打印：
BDB1546 unable to join the environment
cannot open DB environment: Resource temporarily unavailable
Jack: JackWinThread::StartImp : create non RT thread
Jack: JackWinThread::ThreadHandler : start
Jack: Initializing PortAudio...
BDB1546 unable to join the environment
cannot open DB environment: Resource temporarily unavailable
Cannot connect to named pipe after wait = \\.\pipe\server_jack_default_0 err = 2
Cannot connect to server request channel
jack server is not running or cannot be started
JackShmReadWritePtr::~JackShmReadWritePtr - Init not done for -1,skipping unlock
JackShmReadWritePtr::~JackShmReadWritePtr - Init not done for -1,skipping unlock
jack_deactivate called with a NULL client
jack_deactivate called with a NULL client
jack_client_close called with a NULL client
Jack: JackPortAudioDriver::Open nframes = 512 in = 0 out = 0 capture name = ASIO::ASIO4ALL v2 playback name = ASIO::ASIO4ALL v2 samplerate = 44100
Jack: JackDriver::Open capture_driver_name = ASIO::ASIO4ALL v2
Jack: JackDriver::Open playback_driver_name = ASIO::ASIO4ALL v2
Jack: Check protocol client = 8 server = 8
Jack: JackEngine::ClientInternalOpen: name = system
Jack: JackEngine::AllocateRefNum ref = 0
Jack: JackWinSemaphore::Allocate name = jack_pipe.default_system val = 0
Jack: JackEngine::NotifyAddClient: name = system
Jack: JackGraphManager::SetBufferSize size = 512
Jack: JackConnectionManager::DirectConnect first: ref1 = 0 ref2 = 0
Jack: JackGraphManager::ConnectRefNum cur_index = 0 ref1 = 0 ref2 = 0
Jack: JackDriver::SetupDriverSync driver sem in normal mode
Jack: JackPortAudioDriver::Open fInputDevice = 8,fOutputDevice 8
Jack: JackPortAudioDriver::Open setup max in channels = 2
Jack: JackPortAudioDriver::Open setup max out channels = 2
Jack: JackPortAudioDriver::OpenStream buffer_size = 512
Jack: JackWinNamedPipeServerChannel::Open
Jack: JackWinNamedPipeServer::BindAux : fName \\.\pipe\server_jack_default_0
Jack: JackEngine::Open
Jack: JackWinNamedPipeClient::ConnectAux : fName \\.\pipe\server_jack_default_0
Jack: JackEngine::ClientInternalOpen: name = freewheel
Jack: JackEngine::AllocateRefNum ref = 1
Jack: JackWinSemaphore::Allocate name = jack_pipe.default_freewheel val = 0
Jack: JackEngine::NotifyAddClient: name = freewheel
Jack: JackDriver::ClientNotify ref = 1 driver = system name = freewheel notify = 0
Jack: JackDriver::ClientNotify ref = 0 driver = freewheel name = system notify = 0
Jack: JackConnectionManager::DirectConnect first: ref1 = 1 ref2 = 1
Jack: JackGraphManager::ConnectRefNum cur_index = 0 ref1 = 1 ref2 = 1
Jack: JackDriver::SetupDriverSync driver sem in normal mode
Jack: JackAudioDriver::Attach fBufferSize = 512 fSampleRate = 44100
Jack: JackEngine::PortRegister ref = 0 name = system:capture_1 type = 32 bit float mono audio flags = 22 buffer_size = 512
Jack: JackGraphManager::AllocatePortAux port_index = 1 name = system:capture_1 type = 32 bit float mono audio
Jack: JackConnectionManager::AddOutputPort ref = 0 port = 1
Jack: JackEngine::ClientNotify: no callback for notification = 9
Jack: JackEngine::ClientNotify: no callback for notification = 9
Jack: JackAudioDriver::Attach fCapturePortList[i] port_index = 1
Jack: JackEngine::PortRegister ref = 0 name = system:capture_2 type = 32 bit float mono audio flags = 22 buffer_size = 512
Jack: JackGraphManager::AllocatePortAux port_index = 2 name = system:capture_2 type = 32 bit float mono audio
Jack: JackConnectionManager::AddOutputPort ref = 0 port = 2
Jack: JackEngine::ClientNotify: no callback for notification = 9
Jack: JackEngine::ClientNotify: no callback for notification = 9
Jack: JackAudioDriver::Attach fCapturePortList[i] port_index = 2
Jack: JackEngine::PortRegister ref = 0 name = system:playback_1 type = 32 bit float mono audio flags = 21 buffer_size = 512
Jack: JackGraphManager::AllocatePortAux port_index = 3 name = system:playback_1 type = 32 bit float mono audio
Jack: JackConnectionManager::AddInputPort ref = 0 port = 3
Jack: JackEngine::ClientNotify: no callback for notification = 9
Jack: JackEngine::ClientNotify: no callback for notification = 9
Jack: JackAudioDriver::Attach fPlaybackPortList[i] port_index = 3
Jack: JackEngine::PortRegister ref = 0 name = system:playback_2 type = 32 bit float mono audio flags = 21 buffer_size = 512
Jack: JackGraphManager::AllocatePortAux port_index = 4 name = system:playback_2 type = 32 bit float mono audio
Jack: JackConnectionManager::AddInputPort ref = 0 port = 4
Jack: JackEngine::ClientNotify: no callback for notification = 9
Jack: JackEngine::ClientNotify: no callback for notification = 9
Jack: JackAudioDriver::Attach fPlaybackPortList[i] port_index = 4
Jack: InitTime : multimedia timer resolution set to 1 milliseconds
Jack: JackServer::IsRunning
Jack: JackWinMMEDriver::Open - num_potential_inputs 0
Jack: JackWinMMEDriver::Open - num_potential_outputs 1
Jack: JackWinMMEDriver::Open - multimedia timer resolution set to 1 milliseconds.
JackWinMMEDriver::Open - while creating output port: Undefined external error. | winmme,system_midi,out
Jack: JackWinMMEDriver::Open - input_count 0
Jack: JackWinMMEDriver::Open - output_count 0
Jack: JackDriver::Open capture_driver_name = in
Jack: JackDriver::Open playback_driver_name = out
Jack: Check protocol client = 8 server = 8
Jack: JackEngine::ClientInternalOpen: name = system_midi
Jack: JackEngine::AllocateRefNum ref = 2
Jack: JackWinSemaphore::Allocate name = jack_pipe.default_system_midi val = 0
Jack: JackEngine::NotifyAddClient: name = system_midi
Jack: JackDriver::ClientNotify ref = 2 driver = system name = system_midi notify = 0
Jack: JackDriver::ClientNotify ref = 0 driver = system_midi name = system notify = 0
Jack: JackDriver::ClientNotify ref = 2 driver = freewheel name = system_midi notify = 0
Jack: JackDriver::ClientNotify ref = 1 driver = system_midi name = freewheel notify = 0
Jack: JackGraphManager::SetBufferSize size = 512
Jack: JackConnectionManager::DirectConnect first: ref1 = 2 ref2 = 2
Jack: JackGraphManager::ConnectRefNum cur_index = 0 ref1 = 2 ref2 = 2
Jack: JackDriver::SetupDriverSync driver sem in normal mode
Jack: JackWinMMEDriver::Attach - fCaptureChannels 0
Jack: JackWinMMEDriver::Attach - fPlaybackChannels 0
Jack: JackServer::Start
Jack: JackPortAudioDriver::Start
Jack: JackWinMMEDriver::Start - Starting driver.
Jack: JackWinMMEDriver::Start - Enabling input ports.
Jack: JackWinMMEDriver::Start - Enabling output ports.
Jack: JackWinMMEDriver::Start - Driver started.
Jack: JackWinThread::StartImp : create non RT thread
Jack: JackWinThread::ThreadHandler : start
Jack: JackWinNamedPipeServerChannel::Init
Jack: JackWinNamedPipeServerChannel::ClientAdd size 0
Jack: JackWinThread::StartImp : create non RT thread
Jack: JackWinNamedPipeServer::BindAux : fName \\.\pipe\server_jack_default_0
Jack: JackWinThread::ThreadHandler : start
Jack: JackClientPipeThread::Execute 2c272f0
Jack: JackRequest::Notification
Jack: JackDriver::ClientNotify ref = 1 driver = freewheel name = freewheel notify = 18
Jack: JackDriver::ClientNotify ref = 1 driver = freewheel name = freewheel notify = 18
Jack: JackDriver::ClientNotify ref = 1 driver = freewheel name = freewheel notify = 18
Jack: JackDriver::ClientNotify ref = 1 driver = freewheel name = freewheel notify = 18
Jack: JackEngine::ClientNotify: no callback for notification = 4
Jack: JackEngine::ClientNotify: no callback for notification = 4
Jack: JackEngine::ClientNotify: no callback for notification = 4
Jack: JackClientPipeThread::Execute 2c272f0
尽管它似乎已经启动，但会出现一个带有消息的 qjackctl 通知窗口：
Could not connect to Jack server as client.
-Overall operation Failed.
-Unable to connect to server.
Please check the messages window for more info.
不按“取消”，两次我可以让我的程序运行，就像服务器正常运行一样，按“取消”使服务器停止。但在两次反复尝试之间只有一次。至于代码，我还测试了 jack audio docs 中的现成示例，以检查是否会注意到任何差异，但什么也没有。
我真的不知道如何调试这个，因为在互联网上找到的大多数解决方案都是关于 Linux 环境的，除此之外，我发现我的实现实践是正统的，我很确定我可能不得不弄脏我的手使用 API 命令，而不是搜索现成的脚本解决方案。但是，现在首先要调试服务器。
所以如果有人知道我应该如何让 jack 服务器再次正常运行，那就太好了！
编辑 发布问题 10 分钟后，我设法对此进行了调试，但是我将帖子保持打开状态，以帮助面临类似问题的其他人。对我有用的解决方案是运行以下由 server_control 示例修改的 C++ 代码：
#include <iostream>
#include <jack/jack.h>
#include <jack/types.h>
#include <jack/control.h>
static jackctl_driver_t * jackctl_server_get_driver(jackctl_server_t *server,const char *driver_name)
{
const JSList * node_ptr = jackctl_server_get_drivers_list(server);
while (node_ptr) {
if (strcmp(jackctl_driver_get_name((jackctl_driver_t *)node_ptr->data),driver_name) == 0) {
return (jackctl_driver_t *)node_ptr->data;
}
node_ptr = jack_slist_next(node_ptr);
}
return NULL;
}
int main(int argc,char *argv[])
{
jackctl_server_t * server;
const char* driver_name = "portaudio";//You Could probably change the driver name accordingly
server = jackctl_server_create2(NULL,NULL,NULL);
jackctl_server_open(server,jackctl_server_get_driver(server,driver_name));
jackctl_server_start(server);
jackctl_server_stop(server);
jackctl_server_close(server);
jackctl_server_destroy(server);
return 0;
}
解决方法
您的 Windows 音频比特率可能需要与插孔的要求相匹配。否则，某些东西会以独占模式占用您的界面。