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Diffstat (limited to 'libs/backends/jack/jack_utils.cc')
| -rw-r--r-- | libs/backends/jack/jack_utils.cc | 897 |
1 files changed, 897 insertions, 0 deletions
diff --git a/libs/backends/jack/jack_utils.cc b/libs/backends/jack/jack_utils.cc new file mode 100644 index 0000000000..77f3d95aa1 --- /dev/null +++ b/libs/backends/jack/jack_utils.cc @@ -0,0 +1,897 @@ +/* + Copyright (C) 2010 Paul Davis + Copyright (C) 2011 Tim Mayberry + + 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. + +*/ + +#ifdef HAVE_ALSA +#include <alsa/asoundlib.h> +#endif + +#ifdef __APPLE__ +#include <CoreAudio/CoreAudio.h> +#include <CoreFoundation/CFString.h> +#include <sys/param.h> +#include <mach-o/dyld.h> +#endif + +#ifdef HAVE_PORTAUDIO +#include <portaudio.h> +#endif + +#include <jack/jack.h> + +#include <fstream> + +#include <boost/scoped_ptr.hpp> + +#include <glibmm/miscutils.h> + +#include "pbd/epa.h" +#include "pbd/error.h" +#include "pbd/convert.h" +#include "pbd/file_utils.h" +#include "pbd/search_path.h" + +#include "jack_utils.h" + +#ifdef __APPLE +#include <CFBundle.h> +#endif + +#include "i18n.h" + +using namespace std; +using namespace PBD; + +namespace ARDOUR { + // The pretty driver names + const char * const portaudio_driver_name = X_("Portaudio"); + const char * const coreaudio_driver_name = X_("CoreAudio"); + const char * const alsa_driver_name = X_("ALSA"); + const char * const oss_driver_name = X_("OSS"); + const char * const freebob_driver_name = X_("FreeBoB"); + const char * const ffado_driver_name = X_("FFADO"); + const char * const netjack_driver_name = X_("NetJACK"); + const char * const dummy_driver_name = X_("Dummy"); +} + +namespace { + + // The real driver names + const char * const portaudio_driver_command_line_name = X_("portaudio"); + const char * const coreaudio_driver_command_line_name = X_("coreaudio"); + const char * const alsa_driver_command_line_name = X_("alsa"); + const char * const oss_driver_command_line_name = X_("oss"); + const char * const freebob_driver_command_line_name = X_("freebob"); + const char * const ffado_driver_command_line_name = X_("firewire"); + const char * const netjack_driver_command_line_name = X_("netjack"); + const char * const dummy_driver_command_line_name = X_("dummy"); + + // should we provide more "pretty" names like above? + const char * const alsaseq_midi_driver_name = X_("seq"); + const char * const alsaraw_midi_driver_name = X_("raw"); + const char * const winmme_midi_driver_name = X_("winmme"); + const char * const coremidi_midi_driver_name = X_("coremidi"); + + // this should probably be translated + const char * const default_device_name = X_("Default"); +} + +std::string +get_none_string () +{ + return _("None"); +} + +void +ARDOUR::get_jack_audio_driver_names (vector<string>& audio_driver_names) +{ +#ifdef WIN32 + audio_driver_names.push_back (portaudio_driver_name); +#elif __APPLE__ + audio_driver_names.push_back (coreaudio_driver_name); +#else +#ifdef HAVE_ALSA + audio_driver_names.push_back (alsa_driver_name); +#endif + audio_driver_names.push_back (oss_driver_name); + audio_driver_names.push_back (freebob_driver_name); + audio_driver_names.push_back (ffado_driver_name); +#endif + audio_driver_names.push_back (netjack_driver_name); + audio_driver_names.push_back (dummy_driver_name); +} + +void +ARDOUR::get_jack_default_audio_driver_name (string& audio_driver_name) +{ + vector<string> drivers; + get_jack_audio_driver_names (drivers); + audio_driver_name = drivers.front (); +} + +void +ARDOUR::get_jack_sample_rate_strings (vector<string>& samplerates) +{ + // do these really need to be translated? + samplerates.push_back (_("8000Hz")); + samplerates.push_back (_("22050Hz")); + samplerates.push_back (_("44100Hz")); + samplerates.push_back (_("48000Hz")); + samplerates.push_back (_("88200Hz")); + samplerates.push_back (_("96000Hz")); + samplerates.push_back (_("192000Hz")); +} + +string +ARDOUR::get_jack_default_sample_rate () +{ + return _("48000Hz"); +} + +void +ARDOUR::get_jack_period_size_strings (std::vector<std::string>& period_sizes) +{ + period_sizes.push_back ("32"); + period_sizes.push_back ("64"); + period_sizes.push_back ("128"); + period_sizes.push_back ("256"); + period_sizes.push_back ("512"); + period_sizes.push_back ("1024"); + period_sizes.push_back ("2048"); + period_sizes.push_back ("4096"); + period_sizes.push_back ("8192"); +} + +string +ARDOUR::get_jack_default_period_size () +{ + return "1024"; +} + +void +ARDOUR::get_jack_dither_mode_strings (const string& driver, vector<string>& dither_modes) +{ + dither_modes.push_back (get_none_string ()); + + if (driver == alsa_driver_name ) { + dither_modes.push_back (_("Triangular")); + dither_modes.push_back (_("Rectangular")); + dither_modes.push_back (_("Shaped")); + } +} + +string +ARDOUR::get_jack_default_dither_mode (const string& /*driver*/) +{ + return get_none_string (); +} + +string +ARDOUR::get_jack_latency_string (string samplerate, float periods, string period_size) +{ + uint32_t rate = atoi (samplerate); + float psize = atof (period_size); + + char buf[32]; + snprintf (buf, sizeof(buf), "%.1fmsec", (periods * psize) / (rate/1000.0)); + + return buf; +} + +bool +get_jack_command_line_audio_driver_name (const string& driver_name, string& command_line_name) +{ + using namespace ARDOUR; + if (driver_name == portaudio_driver_name) { + command_line_name = portaudio_driver_command_line_name; + return true; + } else if (driver_name == coreaudio_driver_name) { + command_line_name = coreaudio_driver_command_line_name; + return true; + } else if (driver_name == alsa_driver_name) { + command_line_name = alsa_driver_command_line_name; + return true; + } else if (driver_name == oss_driver_name) { + command_line_name = oss_driver_command_line_name; + return true; + } else if (driver_name == freebob_driver_name) { + command_line_name = freebob_driver_command_line_name; + return true; + } else if (driver_name == ffado_driver_name) { + command_line_name = ffado_driver_command_line_name; + return true; + } else if (driver_name == netjack_driver_name) { + command_line_name = netjack_driver_command_line_name; + return true; + } else if (driver_name == dummy_driver_name) { + command_line_name = dummy_driver_command_line_name; + return true; + } + return false; +} + +bool +get_jack_command_line_audio_device_name (const string& driver_name, + const string& device_name, string& command_line_device_name) +{ + using namespace ARDOUR; + device_map_t devices; + + get_jack_device_names_for_audio_driver (driver_name, devices); + + for (device_map_t::const_iterator i = devices.begin (); i != devices.end(); ++i) { + if (i->first == device_name) { + command_line_device_name = i->second; + return true; + } + } + return false; +} + +bool +get_jack_command_line_dither_mode (const string& dither_mode, string& command_line_dither_mode) +{ + using namespace ARDOUR; + + if (dither_mode == _("Triangular")) { + command_line_dither_mode = "triangular"; + return true; + } else if (dither_mode == _("Rectangular")) { + command_line_dither_mode = "rectangular"; + return true; + } else if (dither_mode == _("Shaped")) { + command_line_dither_mode = "shaped"; + return true; + } + + return false; +} + +void +ARDOUR::get_jack_alsa_device_names (device_map_t& devices) +{ +#ifdef HAVE_ALSA + snd_ctl_t *handle; + snd_ctl_card_info_t *info; + snd_pcm_info_t *pcminfo; + snd_ctl_card_info_alloca(&info); + snd_pcm_info_alloca(&pcminfo); + string devname; + int cardnum = -1; + int device = -1; + + while (snd_card_next (&cardnum) >= 0 && cardnum >= 0) { + + devname = "hw:"; + devname += PBD::to_string (cardnum, std::dec); + + if (snd_ctl_open (&handle, devname.c_str(), 0) >= 0 && snd_ctl_card_info (handle, info) >= 0) { + + if (snd_ctl_card_info (handle, info) < 0) { + continue; + } + + string card_name = snd_ctl_card_info_get_name (info); + + /* change devname to use ID, not number */ + + devname = "hw:"; + devname += snd_ctl_card_info_get_id (info); + + while (snd_ctl_pcm_next_device (handle, &device) >= 0 && device >= 0) { + + /* only detect duplex devices here. more + * complex arrangements are beyond our scope + */ + + snd_pcm_info_set_device (pcminfo, device); + snd_pcm_info_set_subdevice (pcminfo, 0); + snd_pcm_info_set_stream (pcminfo, SND_PCM_STREAM_CAPTURE); + + if (snd_ctl_pcm_info (handle, pcminfo) >= 0) { + + snd_pcm_info_set_device (pcminfo, device); + snd_pcm_info_set_subdevice (pcminfo, 0); + snd_pcm_info_set_stream (pcminfo, SND_PCM_STREAM_PLAYBACK); + + if (snd_ctl_pcm_info (handle, pcminfo) >= 0) { + devname += ','; + devname += PBD::to_string (device, std::dec); + devices.insert (std::make_pair (card_name, devname)); + } + } + } + + snd_ctl_close(handle); + } + } +#else + /* silence a compiler unused variable warning */ + (void) devices; +#endif +} + +#ifdef __APPLE__ +static OSStatus +getDeviceUIDFromID( AudioDeviceID id, char *name, size_t nsize) +{ + UInt32 size = sizeof(CFStringRef); + CFStringRef UI; + OSStatus res = AudioDeviceGetProperty(id, 0, false, + kAudioDevicePropertyDeviceUID, &size, &UI); + if (res == noErr) + CFStringGetCString(UI,name,nsize,CFStringGetSystemEncoding()); + CFRelease(UI); + return res; +} +#endif + +void +ARDOUR::get_jack_coreaudio_device_names (device_map_t& devices) +{ +#ifdef __APPLE__ + // Find out how many Core Audio devices are there, if any... + // (code snippet gently "borrowed" from St?hane Letz jackdmp;) + OSStatus err; + Boolean isWritable; + UInt32 outSize = sizeof(isWritable); + + err = AudioHardwareGetPropertyInfo(kAudioHardwarePropertyDevices, + &outSize, &isWritable); + if (err == noErr) { + // Calculate the number of device available... + int numCoreDevices = outSize / sizeof(AudioDeviceID); + // Make space for the devices we are about to get... + AudioDeviceID *coreDeviceIDs = new AudioDeviceID [numCoreDevices]; + err = AudioHardwareGetProperty(kAudioHardwarePropertyDevices, + &outSize, (void *) coreDeviceIDs); + if (err == noErr) { + // Look for the CoreAudio device name... + char coreDeviceName[256]; + UInt32 nameSize; + + for (int i = 0; i < numCoreDevices; i++) { + + nameSize = sizeof (coreDeviceName); + + /* enforce duplex devices only */ + + err = AudioDeviceGetPropertyInfo(coreDeviceIDs[i], + 0, true, kAudioDevicePropertyStreams, + &outSize, &isWritable); + + if (err != noErr || outSize == 0) { + continue; + } + + err = AudioDeviceGetPropertyInfo(coreDeviceIDs[i], + 0, false, kAudioDevicePropertyStreams, + &outSize, &isWritable); + + if (err != noErr || outSize == 0) { + continue; + } + + err = AudioDeviceGetPropertyInfo(coreDeviceIDs[i], + 0, true, kAudioDevicePropertyDeviceName, + &outSize, &isWritable); + if (err == noErr) { + err = AudioDeviceGetProperty(coreDeviceIDs[i], + 0, true, kAudioDevicePropertyDeviceName, + &nameSize, (void *) coreDeviceName); + if (err == noErr) { + char drivername[128]; + + // this returns the unique id for the device + // that must be used on the commandline for jack + + if (getDeviceUIDFromID(coreDeviceIDs[i], drivername, sizeof (drivername)) == noErr) { + devices.insert (make_pair (coreDeviceName, drivername)); + } + } + } + } + } + delete [] coreDeviceIDs; + } +#else + /* silence a compiler unused variable warning */ + (void) devices; +#endif +} + +void +ARDOUR::get_jack_portaudio_device_names (device_map_t& devices) +{ +#ifdef HAVE_PORTAUDIO + if (Pa_Initialize() != paNoError) { + return; + } + + for (PaDeviceIndex i = 0; i < Pa_GetDeviceCount (); ++i) { + string api_name; + string readable_name; + string jack_device_name; + const PaDeviceInfo* device_info = Pa_GetDeviceInfo(i); + + if (device_info != NULL) { // it should never be ? + api_name = Pa_GetHostApiInfo (device_info->hostApi)->name; + readable_name = api_name + " " + device_info->name; + jack_device_name = api_name + "::" + device_info->name; + devices.insert (make_pair (readable_name, jack_device_name)); + } + } + Pa_Terminate(); +#else + /* silence a compiler unused variable warning */ + (void) devices; +#endif +} + +void +ARDOUR::get_jack_oss_device_names (device_map_t& devices) +{ + devices.insert (make_pair (default_device_name, default_device_name)); +} + +void +ARDOUR::get_jack_freebob_device_names (device_map_t& devices) +{ + devices.insert (make_pair (default_device_name, default_device_name)); +} + +void +ARDOUR::get_jack_ffado_device_names (device_map_t& devices) +{ + devices.insert (make_pair (default_device_name, default_device_name)); +} + +void +ARDOUR::get_jack_netjack_device_names (device_map_t& devices) +{ + devices.insert (make_pair (default_device_name, default_device_name)); +} + +void +ARDOUR::get_jack_dummy_device_names (device_map_t& devices) +{ + devices.insert (make_pair (default_device_name, default_device_name)); +} + +bool +ARDOUR::get_jack_device_names_for_audio_driver (const string& driver_name, device_map_t& devices) +{ + devices.clear(); + + if (driver_name == portaudio_driver_name) { + get_jack_portaudio_device_names (devices); + } else if (driver_name == coreaudio_driver_name) { + get_jack_coreaudio_device_names (devices); + } else if (driver_name == alsa_driver_name) { + get_jack_alsa_device_names (devices); + } else if (driver_name == oss_driver_name) { + get_jack_oss_device_names (devices); + } else if (driver_name == freebob_driver_name) { + get_jack_freebob_device_names (devices); + } else if (driver_name == ffado_driver_name) { + get_jack_ffado_device_names (devices); + } else if (driver_name == netjack_driver_name) { + get_jack_netjack_device_names (devices); + } else if (driver_name == dummy_driver_name) { + get_jack_dummy_device_names (devices); + } + + return !devices.empty(); +} + + +std::vector<std::string> +ARDOUR::get_jack_device_names_for_audio_driver (const string& driver_name) +{ + std::vector<std::string> readable_names; + device_map_t devices; + + get_jack_device_names_for_audio_driver (driver_name, devices); + + for (device_map_t::const_iterator i = devices.begin (); i != devices.end(); ++i) { + readable_names.push_back (i->first); + } + + return readable_names; +} + +bool +ARDOUR::get_jack_audio_driver_supports_two_devices (const string& driver) +{ + return (driver == alsa_driver_name || driver == oss_driver_name); +} + +bool +ARDOUR::get_jack_audio_driver_supports_latency_adjustment (const string& driver) +{ + return (driver == alsa_driver_name || driver == coreaudio_driver_name || + driver == ffado_driver_name || driver == portaudio_driver_name); +} + +bool +ARDOUR::get_jack_audio_driver_supports_setting_period_count (const string& driver) +{ + return !(driver == dummy_driver_name || driver == coreaudio_driver_name || + driver == portaudio_driver_name); +} + +bool +ARDOUR::get_jack_server_application_names (std::vector<std::string>& server_names) +{ +#ifdef WIN32 + server_names.push_back ("jackd.exe"); +#else + server_names.push_back ("jackd"); + server_names.push_back ("jackdmp"); +#endif + return !server_names.empty(); +} + +void +ARDOUR::set_path_env_for_jack_autostart (const vector<std::string>& dirs) +{ +#ifdef __APPLE__ + // push it back into the environment so that auto-started JACK can find it. + // XXX why can't we just expect OS X users to have PATH set correctly? we can't ... + setenv ("PATH", SearchPath(dirs).to_string().c_str(), 1); +#else + /* silence a compiler unused variable warning */ + (void) dirs; +#endif +} + +bool +ARDOUR::get_jack_server_dir_paths (vector<std::string>& server_dir_paths) +{ +#ifdef __APPLE__ + /* this magic lets us finds the path to the OSX bundle, and then + we infer JACK's location from there + */ + + char execpath[MAXPATHLEN+1]; + uint32_t pathsz = sizeof (execpath); + + _NSGetExecutablePath (execpath, &pathsz); + + server_dir_paths.push_back (Glib::path_get_dirname (execpath)); +#endif + + SearchPath sp(string(g_getenv("PATH"))); + +#ifdef WIN32 + gchar *install_dir = g_win32_get_package_installation_directory_of_module (NULL); + if (install_dir) { + sp.push_back (install_dir); + g_free (install_dir); + } + // don't try and use a system wide JACK install yet. +#else + if (sp.empty()) { + sp.push_back ("/usr/bin"); + sp.push_back ("/bin"); + sp.push_back ("/usr/local/bin"); + sp.push_back ("/opt/local/bin"); + } +#endif + + std::copy (sp.begin(), sp.end(), std::back_inserter(server_dir_paths)); + + return !server_dir_paths.empty(); +} + +bool +ARDOUR::get_jack_server_paths (const vector<std::string>& server_dir_paths, + const vector<string>& server_names, + vector<std::string>& server_paths) +{ + for (vector<string>::const_iterator i = server_names.begin(); i != server_names.end(); ++i) { + Glib::PatternSpec ps (*i); + find_matching_files_in_directories (server_dir_paths, ps, server_paths); + } + return !server_paths.empty(); +} + +bool +ARDOUR::get_jack_server_paths (vector<std::string>& server_paths) +{ + vector<std::string> server_dirs; + + if (!get_jack_server_dir_paths (server_dirs)) { + return false; + } + + vector<string> server_names; + + if (!get_jack_server_application_names (server_names)) { + return false; + } + + if (!get_jack_server_paths (server_dirs, server_names, server_paths)) { + return false; + } + + return !server_paths.empty(); +} + +bool +ARDOUR::get_jack_default_server_path (std::string& server_path) +{ + vector<std::string> server_paths; + + if (!get_jack_server_paths (server_paths)) { + return false; + } + + server_path = server_paths.front (); + return true; +} + +string +quote_string (const string& str) +{ + return "\"" + str + "\""; +} + +ARDOUR::JackCommandLineOptions::JackCommandLineOptions () + : server_path () + , timeout(0) + , no_mlock(false) + , ports_max(128) + , realtime(true) + , priority(0) + , unlock_gui_libs(false) + , verbose(false) + , temporary(true) + , driver() + , input_device() + , output_device() + , num_periods(2) + , period_size(1024) + , samplerate(48000) + , input_latency(0) + , output_latency(0) + , hardware_metering(false) + , hardware_monitoring(false) + , dither_mode() + , force16_bit(false) + , soft_mode(false) + , midi_driver() +{ + +} + +bool +ARDOUR::get_jack_command_line_string (const JackCommandLineOptions& options, string& command_line) +{ + vector<string> args; + + args.push_back (options.server_path); + +#ifdef WIN32 + // must use sync mode on windows + args.push_back ("-S"); + + // this needs to be added now on windows + if (!options.midi_driver.empty () && options.midi_driver != get_none_string ()) { + args.push_back ("-X"); + args.push_back (options.midi_driver); + } +#endif + + if (options.timeout) { + args.push_back ("-t"); + args.push_back (to_string (options.timeout, std::dec)); + } + + if (options.no_mlock) { + args.push_back ("-m"); + } + + args.push_back ("-p"); + args.push_back (to_string(options.ports_max, std::dec)); + + if (options.realtime) { + args.push_back ("-R"); + if (options.priority != 0) { + args.push_back ("-P"); + args.push_back (to_string(options.priority, std::dec)); + } + } else { + args.push_back ("-r"); + } + + if (options.unlock_gui_libs) { + args.push_back ("-u"); + } + + if (options.verbose) { + args.push_back ("-v"); + } + +#ifndef WIN32 + if (options.temporary) { + args.push_back ("-T"); + } +#endif + + string command_line_driver_name; + + if (!get_jack_command_line_audio_driver_name (options.driver, command_line_driver_name)) { + return false; + } + + args.push_back ("-d"); + args.push_back (command_line_driver_name); + + if (options.output_device.empty() && options.input_device.empty()) { + return false; + } + + string command_line_input_device_name; + string command_line_output_device_name; + + if (!get_jack_command_line_audio_device_name (options.driver, + options.input_device, command_line_input_device_name)) { + return false; + } + + if (!get_jack_command_line_audio_device_name (options.driver, + options.output_device, command_line_output_device_name)) { + return false; + } + + if (options.input_device.empty()) { + // playback only + if (options.output_device.empty()) { + return false; + } + args.push_back ("-P"); + } else if (options.output_device.empty()) { + // capture only + if (options.input_device.empty()) { + return false; + } + args.push_back ("-C"); + } else if (options.input_device != options.output_device) { + // capture and playback on two devices if supported + if (get_jack_audio_driver_supports_two_devices (options.driver)) { + args.push_back ("-C"); + args.push_back (command_line_input_device_name); + args.push_back ("-P"); + args.push_back (command_line_output_device_name); + } else { + return false; + } + } + + if (options.input_channels) { + args.push_back ("-i"); + args.push_back (to_string (options.input_channels, std::dec)); + } + + if (options.output_channels) { + args.push_back ("-o"); + args.push_back (to_string (options.output_channels, std::dec)); + } + + if (get_jack_audio_driver_supports_setting_period_count (options.driver)) { + args.push_back ("-n"); + args.push_back (to_string (options.num_periods, std::dec)); + } + + args.push_back ("-r"); + args.push_back (to_string (options.samplerate, std::dec)); + + args.push_back ("-p"); + args.push_back (to_string (options.period_size, std::dec)); + + if (get_jack_audio_driver_supports_latency_adjustment (options.driver)) { + if (options.input_latency) { + args.push_back ("-I"); + args.push_back (to_string (options.input_latency, std::dec)); + } + if (options.output_latency) { + args.push_back ("-O"); + args.push_back (to_string (options.output_latency, std::dec)); + } + } + + if (options.input_device == options.output_device && options.input_device != default_device_name) { + args.push_back ("-d"); + args.push_back (command_line_input_device_name); + } + + if (options.driver == alsa_driver_name) { + if (options.hardware_metering) { + args.push_back ("-M"); + } + if (options.hardware_monitoring) { + args.push_back ("-H"); + } + + string command_line_dither_mode; + if (get_jack_command_line_dither_mode (options.dither_mode, command_line_dither_mode)) { + args.push_back ("-z"); + args.push_back (command_line_dither_mode); + } + if (options.force16_bit) { + args.push_back ("-S"); + } + if (options.soft_mode) { + args.push_back ("-s"); + } + + if (!options.midi_driver.empty() && options.midi_driver != get_none_string ()) { + args.push_back ("-X"); + args.push_back (options.midi_driver); + } + } + + ostringstream oss; + + for (vector<string>::const_iterator i = args.begin(); i != args.end();) { +#ifdef WIN32 + oss << quote_string (*i); +#else + oss << *i; +#endif + if (++i != args.end()) oss << ' '; + } + + command_line = oss.str(); + return true; +} + +string +ARDOUR::get_jack_server_config_file_name () +{ + return ".jackdrc"; +} + +std::string +ARDOUR::get_jack_server_user_config_dir_path () +{ + return Glib::get_home_dir (); +} + +std::string +ARDOUR::get_jack_server_user_config_file_path () +{ + return Glib::build_filename (get_jack_server_user_config_dir_path (), get_jack_server_config_file_name ()); +} + +bool +ARDOUR::write_jack_config_file (const std::string& config_file_path, const string& command_line) +{ + ofstream jackdrc (config_file_path.c_str()); + + if (!jackdrc) { + error << string_compose (_("cannot open JACK rc file %1 to store parameters"), config_file_path) << endmsg; + return false; + } + + jackdrc << command_line << endl; + jackdrc.close (); + return true; +} |