X-Git-Url: https://main.carlh.net/gitweb/?a=blobdiff_plain;f=libs%2Fbackends%2Falsa%2Falsa_audiobackend.cc;h=5c267d6c7f320df44b9f8cc1237b0c487599a24a;hb=cf52d6e4b40111eb04b244ec054055a4ec15dbe0;hp=34f28b24aaeee9b84a4ab417f45a0c80e149c5be;hpb=8e9b02cfa21fc75f1b6f35c0b80295f421f3cd9e;p=ardour.git diff --git a/libs/backends/alsa/alsa_audiobackend.cc b/libs/backends/alsa/alsa_audiobackend.cc index 34f28b24aa..5c267d6c7f 100644 --- a/libs/backends/alsa/alsa_audiobackend.cc +++ b/libs/backends/alsa/alsa_audiobackend.cc @@ -26,36 +26,57 @@ #include "alsa_audiobackend.h" #include "rt_thread.h" +#include "pbd/compose.h" #include "pbd/error.h" +#include "pbd/file_utils.h" +#include "ardour/filesystem_paths.h" #include "ardour/port_manager.h" -#include "i18n.h" +#include "ardouralsautil/devicelist.h" +#include "pbd/i18n.h" using namespace ARDOUR; static std::string s_instance_name; size_t AlsaAudioBackend::_max_buffer_size = 8192; +std::vector AlsaAudioBackend::_midi_options; +std::vector AlsaAudioBackend::_input_audio_device_status; +std::vector AlsaAudioBackend::_output_audio_device_status; +std::vector AlsaAudioBackend::_duplex_audio_device_status; +std::vector AlsaAudioBackend::_midi_device_status; + +ALSADeviceInfo AlsaAudioBackend::_input_audio_device_info; +ALSADeviceInfo AlsaAudioBackend::_output_audio_device_info; AlsaAudioBackend::AlsaAudioBackend (AudioEngine& e, AudioBackendInfo& info) : AudioBackend (e, info) , _pcmi (0) - , _running (false) + , _run (false) + , _active (false) + , _freewheel (false) , _freewheeling (false) - , _capture_device("") - , _playback_device("") + , _measure_latency (false) + , _last_process_start (0) + , _input_audio_device("") + , _output_audio_device("") + , _midi_driver_option(get_standard_device_name(DeviceNone)) + , _device_reservation(0) , _samplerate (48000) , _samples_per_period (1024) , _periods_per_cycle (2) - , _dsp_load (0) , _n_inputs (0) , _n_outputs (0) - , _n_midi_inputs (0) - , _n_midi_outputs (0) - , _systemic_input_latency (0) - , _systemic_output_latency (0) + , _systemic_audio_input_latency (0) + , _systemic_audio_output_latency (0) + , _dsp_load (0) , _processed_samples (0) + , _midi_ins (0) + , _midi_outs (0) + , _port_change_flag (false) { _instance_name = s_instance_name; pthread_mutex_init (&_port_callback_mutex, 0); + _input_audio_device_info.valid = false; + _output_audio_device_info.valid = false; } AlsaAudioBackend::~AlsaAudioBackend () @@ -80,72 +101,244 @@ AlsaAudioBackend::is_realtime () const std::vector AlsaAudioBackend::enumerate_devices () const { - std::vector s; - int cardnum = -1; - snd_ctl_card_info_t *info; - snd_ctl_card_info_alloca (&info); + _duplex_audio_device_status.clear(); + std::map devices; + get_alsa_audio_device_names(devices); + for (std::map::const_iterator i = devices.begin (); i != devices.end(); ++i) { + if (_input_audio_device == "") _input_audio_device = i->first; + if (_output_audio_device == "") _output_audio_device = i->first; + _duplex_audio_device_status.push_back (DeviceStatus (i->first, true)); + } + return _duplex_audio_device_status; +} + +std::vector +AlsaAudioBackend::enumerate_input_devices () const +{ + _input_audio_device_status.clear(); + std::map devices; + get_alsa_audio_device_names(devices, HalfDuplexIn); + _input_audio_device_status.push_back (DeviceStatus (get_standard_device_name(DeviceNone), true)); + for (std::map::const_iterator i = devices.begin (); i != devices.end(); ++i) { + if (_input_audio_device == "") _input_audio_device = i->first; + _input_audio_device_status.push_back (DeviceStatus (i->first, true)); + } + return _input_audio_device_status; +} + +std::vector +AlsaAudioBackend::enumerate_output_devices () const +{ + _output_audio_device_status.clear(); + std::map devices; + get_alsa_audio_device_names(devices, HalfDuplexOut); + _output_audio_device_status.push_back (DeviceStatus (get_standard_device_name(DeviceNone), true)); + for (std::map::const_iterator i = devices.begin (); i != devices.end(); ++i) { + if (_output_audio_device == "") _output_audio_device = i->first; + _output_audio_device_status.push_back (DeviceStatus (i->first, true)); + } + return _output_audio_device_status; +} - // TODO re-use code from libs/backends/jack/jack_utils.cc - while (snd_card_next (&cardnum) >= 0 && cardnum >= 0) { - snd_ctl_t *handle; +void +AlsaAudioBackend::reservation_stdout (std::string d, size_t /* s */) +{ + if (d.substr(0, 19) == "Acquired audio-card") { + _reservation_succeeded = true; + } +} - std::string devname = "hw:"; - devname += PBD::to_string (cardnum, std::dec); +void +AlsaAudioBackend::release_device() +{ + _reservation_connection.drop_connections(); + ARDOUR::SystemExec * tmp = _device_reservation; + _device_reservation = 0; + delete tmp; +} - if (snd_ctl_open (&handle, devname.c_str(), 0) >= 0 && snd_ctl_card_info (handle, info) >= 0) { - //string card_name = snd_ctl_card_info_get_name (info); - int device = -1; - if (snd_ctl_pcm_next_device (handle, &device) >= 0 && device >= 0) { - s.push_back (DeviceStatus (devname, true)); - } - snd_ctl_close(handle); +bool +AlsaAudioBackend::acquire_device(const char* device_name) +{ + /* This is quick hack, ideally we'll link against libdbus and implement a dbus-listener + * that owns the device. here we try to get away by just requesting it and then block it... + * (pulseaudio periodically checks anyway) + * + * dbus-send --session --print-reply --type=method_call --dest=org.freedesktop.ReserveDevice1.Audio2 /org/freedesktop/ReserveDevice1/Audio2 org.freedesktop.ReserveDevice1.RequestRelease int32:4 + * -> should not return 'boolean false' + */ + int device_number = card_to_num(device_name); + if (device_number < 0) return false; + + assert(_device_reservation == 0); + _reservation_succeeded = false; + + std::string request_device_exe; + if (!PBD::find_file ( + PBD::Searchpath(Glib::build_filename(ARDOUR::ardour_dll_directory(), "ardouralsautil") + + G_SEARCHPATH_SEPARATOR_S + ARDOUR::ardour_dll_directory()), + "ardour-request-device", request_device_exe)) + { + PBD::warning << "ardour-request-device binary was not found..'" << endmsg; + return false; + } + else + { + char **argp; + char tmp[128]; + argp=(char**) calloc(5,sizeof(char*)); + argp[0] = strdup(request_device_exe.c_str()); + argp[1] = strdup("-P"); + snprintf(tmp, sizeof(tmp), "%d", getpid()); + argp[2] = strdup(tmp); + snprintf(tmp, sizeof(tmp), "Audio%d", device_number); + argp[3] = strdup(tmp); + argp[4] = 0; + + _device_reservation = new ARDOUR::SystemExec(request_device_exe, argp); + _device_reservation->ReadStdout.connect_same_thread (_reservation_connection, boost::bind (&AlsaAudioBackend::reservation_stdout, this, _1 ,_2)); + _device_reservation->Terminated.connect_same_thread (_reservation_connection, boost::bind (&AlsaAudioBackend::release_device, this)); + if (_device_reservation->start(0)) { + PBD::warning << _("AlsaAudioBackend: Device Request failed.") << endmsg; + release_device(); + return false; } } - return s; + // wait to check if reservation suceeded. + int timeout = 500; // 5 sec + while (_device_reservation && !_reservation_succeeded && --timeout > 0) { + Glib::usleep(10000); + } + if (timeout == 0 || !_reservation_succeeded) { + PBD::warning << _("AlsaAudioBackend: Device Reservation failed.") << endmsg; + release_device(); + return false; + } + return true; } std::vector -AlsaAudioBackend::available_sample_rates (const std::string&) const +AlsaAudioBackend::available_sample_rates2 (const std::string& input_device, const std::string& output_device) const { std::vector sr; - sr.push_back (8000.0); - sr.push_back (22050.0); - sr.push_back (24000.0); - sr.push_back (44100.0); - sr.push_back (48000.0); - sr.push_back (88200.0); - sr.push_back (96000.0); - sr.push_back (176400.0); - sr.push_back (192000.0); + if (input_device == get_standard_device_name(DeviceNone) && output_device == get_standard_device_name(DeviceNone)) { + return sr; + } + else if (input_device == get_standard_device_name(DeviceNone)) { + sr = available_sample_rates (output_device); + } + else if (output_device == get_standard_device_name(DeviceNone)) { + sr = available_sample_rates (input_device); + } else { + std::vector sr_in = available_sample_rates (input_device); + std::vector sr_out = available_sample_rates (output_device); + std::set_intersection (sr_in.begin(), sr_in.end(), sr_out.begin(), sr_out.end(), std::back_inserter(sr)); + } + return sr; +} + +std::vector +AlsaAudioBackend::available_sample_rates (const std::string& device) const +{ + ALSADeviceInfo *nfo = NULL; + std::vector sr; + if (device == get_standard_device_name(DeviceNone)) { + return sr; + } + if (device == _input_audio_device && _input_audio_device_info.valid) { + nfo = &_input_audio_device_info; + } + else if (device == _output_audio_device && _output_audio_device_info.valid) { + nfo = &_output_audio_device_info; + } + + static const float avail_rates [] = { 8000, 22050.0, 24000.0, 44100.0, 48000.0, 88200.0, 96000.0, 176400.0, 192000.0 }; + + for (size_t i = 0 ; i < sizeof(avail_rates) / sizeof(float); ++i) { + if (!nfo || (avail_rates[i] >= nfo->min_rate && avail_rates[i] <= nfo->max_rate)) { + sr.push_back (avail_rates[i]); + } + } + return sr; } std::vector -AlsaAudioBackend::available_buffer_sizes (const std::string&) const +AlsaAudioBackend::available_buffer_sizes2 (const std::string& input_device, const std::string& output_device) const +{ + std::vector bs; + if (input_device == get_standard_device_name(DeviceNone) && output_device == get_standard_device_name(DeviceNone)) { + return bs; + } + else if (input_device == get_standard_device_name(DeviceNone)) { + bs = available_buffer_sizes (output_device); + } + else if (output_device == get_standard_device_name(DeviceNone)) { + bs = available_buffer_sizes (input_device); + } else { + std::vector bs_in = available_buffer_sizes (input_device); + std::vector bs_out = available_buffer_sizes (output_device); + std::set_intersection (bs_in.begin(), bs_in.end(), bs_out.begin(), bs_out.end(), std::back_inserter(bs)); + } + return bs; +} + +std::vector +AlsaAudioBackend::available_buffer_sizes (const std::string& device) const { + ALSADeviceInfo *nfo = NULL; std::vector bs; - bs.push_back (32); - bs.push_back (64); - bs.push_back (128); - bs.push_back (256); - bs.push_back (512); - bs.push_back (1024); - bs.push_back (2048); - bs.push_back (4096); - bs.push_back (8192); + if (device == get_standard_device_name(DeviceNone)) { + return bs; + } + if (device == _input_audio_device && _input_audio_device_info.valid) { + nfo = &_input_audio_device_info; + } + else if (device == _output_audio_device && _output_audio_device_info.valid) { + nfo = &_output_audio_device_info; + } + + static const unsigned long avail_sizes [] = { 32, 64, 128, 256, 512, 1024, 2048, 4096, 8192 }; + + for (size_t i = 0 ; i < sizeof(avail_sizes) / sizeof(unsigned long); ++i) { + if (!nfo || (avail_sizes[i] >= nfo->min_size && avail_sizes[i] <= nfo->max_size)) { + bs.push_back (avail_sizes[i]); + } + } return bs; } uint32_t -AlsaAudioBackend::available_input_channel_count (const std::string&) const +AlsaAudioBackend::available_input_channel_count (const std::string& device) const { - return 128; // TODO query current device + if (device == get_standard_device_name(DeviceNone)) { + return 0; + } + if (device == _input_audio_device && _input_audio_device_info.valid) { + return _input_audio_device_info.max_channels; + } + return 128; } uint32_t -AlsaAudioBackend::available_output_channel_count (const std::string&) const +AlsaAudioBackend::available_output_channel_count (const std::string& device) const { - return 128; // TODO query current device + if (device == get_standard_device_name(DeviceNone)) { + return 0; + } + if (device == _output_audio_device && _output_audio_device_info.valid) { + return _output_audio_device_info.max_channels; + } + return 128; +} + +std::vector +AlsaAudioBackend::available_period_sizes (const std::string& driver) const +{ + std::vector ps; + ps.push_back (2); + ps.push_back (3); + return ps; } bool @@ -157,17 +350,80 @@ AlsaAudioBackend::can_change_sample_rate_when_running () const bool AlsaAudioBackend::can_change_buffer_size_when_running () const { - return false; + return false; // why not? :) } int -AlsaAudioBackend::set_device_name (const std::string& d) +AlsaAudioBackend::set_input_device_name (const std::string& d) { - _capture_device = d; - _playback_device = d; + if (_input_audio_device == d) { + return 0; + } + _input_audio_device = d; + + if (d == get_standard_device_name(DeviceNone)) { + _input_audio_device_info.valid = false; + return 0; + } + std::string alsa_device; + std::map devices; + + get_alsa_audio_device_names(devices, HalfDuplexIn); + for (std::map::const_iterator i = devices.begin (); i != devices.end(); ++i) { + if (i->first == d) { + alsa_device = i->second; + break; + } + } + if (alsa_device == "") { + _input_audio_device_info.valid = false; + return 1; + } + /* device will be busy once used, hence cache the parameters */ + /* return */ get_alsa_device_parameters (alsa_device.c_str(), true, &_input_audio_device_info); + return 0; +} + +int +AlsaAudioBackend::set_output_device_name (const std::string& d) +{ + if (_output_audio_device == d) { + return 0; + } + + _output_audio_device = d; + + if (d == get_standard_device_name(DeviceNone)) { + _output_audio_device_info.valid = false; + return 0; + } + std::string alsa_device; + std::map devices; + + get_alsa_audio_device_names(devices, HalfDuplexOut); + for (std::map::const_iterator i = devices.begin (); i != devices.end(); ++i) { + if (i->first == d) { + alsa_device = i->second; + break; + } + } + if (alsa_device == "") { + _output_audio_device_info.valid = false; + return 1; + } + /* return */ get_alsa_device_parameters (alsa_device.c_str(), true, &_output_audio_device_info); return 0; } +int +AlsaAudioBackend::set_device_name (const std::string& d) +{ + int rv = 0; + rv |= set_input_device_name (d); + rv |= set_output_device_name (d); + return rv; +} + int AlsaAudioBackend::set_sample_rate (float sr) { @@ -177,12 +433,28 @@ AlsaAudioBackend::set_sample_rate (float sr) return 0; } +int +AlsaAudioBackend::set_peridod_size (uint32_t n) +{ + if (n == 0 || n > 3) { + return -1; + } + if (_run) { + return -1; + } + _periods_per_cycle = n; + return 0; +} + int AlsaAudioBackend::set_buffer_size (uint32_t bs) { if (bs <= 0 || bs >= _max_buffer_size) { return -1; } + if (_run) { + return -1; + } _samples_per_period = bs; engine.buffer_size_change (bs); return 0; @@ -212,22 +484,115 @@ AlsaAudioBackend::set_output_channels (uint32_t cc) int AlsaAudioBackend::set_systemic_input_latency (uint32_t sl) { - _systemic_input_latency = sl; + _systemic_audio_input_latency = sl; + if (_run) { + update_systemic_audio_latencies(); + } return 0; } int AlsaAudioBackend::set_systemic_output_latency (uint32_t sl) { - _systemic_output_latency = sl; + _systemic_audio_output_latency = sl; + if (_run) { + update_systemic_audio_latencies(); + } + return 0; +} + +int +AlsaAudioBackend::set_systemic_midi_input_latency (std::string const device, uint32_t sl) +{ + struct AlsaMidiDeviceInfo * nfo = midi_device_info(device); + if (!nfo) return -1; + nfo->systemic_input_latency = sl; + if (_run && nfo->enabled) { + update_systemic_midi_latencies (); + } return 0; } +int +AlsaAudioBackend::set_systemic_midi_output_latency (std::string const device, uint32_t sl) +{ + struct AlsaMidiDeviceInfo * nfo = midi_device_info(device); + if (!nfo) return -1; + nfo->systemic_output_latency = sl; + if (_run && nfo->enabled) { + update_systemic_midi_latencies (); + } + return 0; +} + +void +AlsaAudioBackend::update_systemic_audio_latencies () +{ + const uint32_t lcpp = (_periods_per_cycle - 2) * _samples_per_period; + LatencyRange lr; + + lr.min = lr.max = lcpp + (_measure_latency ? 0 : _systemic_audio_input_latency); + for (std::vector::const_iterator it = _system_outputs.begin (); it != _system_outputs.end (); ++it) { + set_latency_range (*it, true, lr); + } + + lr.min = lr.max = (_measure_latency ? 0 : _systemic_audio_output_latency); + for (std::vector::const_iterator it = _system_inputs.begin (); it != _system_inputs.end (); ++it) { + set_latency_range (*it, false, lr); + } + update_latencies (); +} + +void +AlsaAudioBackend::update_systemic_midi_latencies () +{ + uint32_t i = 0; + for (std::vector::iterator it = _system_midi_out.begin (); it != _system_midi_out.end (); ++it, ++i) { + assert (_rmidi_out.size() > i); + AlsaMidiOut *rm = _rmidi_out.at(i); + struct AlsaMidiDeviceInfo * nfo = midi_device_info (rm->name()); + assert (nfo); + LatencyRange lr; + lr.min = lr.max = (_measure_latency ? 0 : nfo->systemic_output_latency); + set_latency_range (*it, false, lr); + } + + i = 0; + for (std::vector::const_iterator it = _system_midi_in.begin (); it != _system_midi_in.end (); ++it, ++i) { + assert (_rmidi_in.size() > i); + AlsaMidiIO *rm = _rmidi_in.at(i); + struct AlsaMidiDeviceInfo * nfo = midi_device_info (rm->name()); + assert (nfo); + LatencyRange lr; + lr.min = lr.max = (_measure_latency ? 0 : nfo->systemic_input_latency); + set_latency_range (*it, true, lr); + } + update_latencies (); +} + /* Retrieving parameters */ std::string AlsaAudioBackend::device_name () const { - return _capture_device; + if (_input_audio_device != get_standard_device_name(DeviceNone)) { + return _input_audio_device; + } + if (_output_audio_device != get_standard_device_name(DeviceNone)) { + return _output_audio_device; + } + return ""; +} + +std::string +AlsaAudioBackend::input_device_name () const +{ + return _input_audio_device; +} + +std::string +AlsaAudioBackend::output_device_name () const +{ + return _output_audio_device; } float @@ -242,6 +607,12 @@ AlsaAudioBackend::buffer_size () const return _samples_per_period; } +uint32_t +AlsaAudioBackend::period_size () const +{ + return _periods_per_cycle; +} + bool AlsaAudioBackend::interleaved () const { @@ -263,34 +634,156 @@ AlsaAudioBackend::output_channels () const uint32_t AlsaAudioBackend::systemic_input_latency () const { - return _systemic_input_latency; + return _systemic_audio_input_latency; } uint32_t AlsaAudioBackend::systemic_output_latency () const { - return _systemic_output_latency; + return _systemic_audio_output_latency; +} + +uint32_t +AlsaAudioBackend::systemic_midi_input_latency (std::string const device) const +{ + struct AlsaMidiDeviceInfo * nfo = midi_device_info(device); + if (!nfo) return 0; + return nfo->systemic_input_latency; +} + +uint32_t +AlsaAudioBackend::systemic_midi_output_latency (std::string const device) const +{ + struct AlsaMidiDeviceInfo * nfo = midi_device_info(device); + if (!nfo) return 0; + return nfo->systemic_output_latency; } /* MIDI */ +struct AlsaAudioBackend::AlsaMidiDeviceInfo * +AlsaAudioBackend::midi_device_info(std::string const name) const { + for (std::map::const_iterator i = _midi_devices.begin (); i != _midi_devices.end(); ++i) { + if (i->first == name) { + return (i->second); + } + } + + assert(_midi_driver_option != get_standard_device_name(DeviceNone)); + + std::map devices; + if (_midi_driver_option == _("ALSA raw devices")) { + get_alsa_rawmidi_device_names(devices); + } else { + get_alsa_sequencer_names (devices); + } + + for (std::map::const_iterator i = devices.begin (); i != devices.end(); ++i) { + if (i->first == name) { + _midi_devices[name] = new AlsaMidiDeviceInfo(); + return _midi_devices[name]; + } + } + return 0; +} + std::vector AlsaAudioBackend::enumerate_midi_options () const { - std::vector m; - m.push_back (_("-None-")); - return m; + if (_midi_options.empty()) { + _midi_options.push_back (_("ALSA raw devices")); + _midi_options.push_back (_("ALSA sequencer")); + _midi_options.push_back (get_standard_device_name(DeviceNone)); + } + return _midi_options; +} + +std::vector +AlsaAudioBackend::enumerate_midi_devices () const +{ + _midi_device_status.clear(); + std::map devices; + + if (_midi_driver_option == _("ALSA raw devices")) { + get_alsa_rawmidi_device_names (devices); + } + else if (_midi_driver_option == _("ALSA sequencer")) { + get_alsa_sequencer_names (devices); + } + + for (std::map::const_iterator i = devices.begin (); i != devices.end(); ++i) { + _midi_device_status.push_back (DeviceStatus (i->first, true)); + } + return _midi_device_status; } int -AlsaAudioBackend::set_midi_option (const std::string& /* opt*/) +AlsaAudioBackend::set_midi_option (const std::string& opt) { - return -1; + if (opt != get_standard_device_name(DeviceNone) && opt != _("ALSA raw devices") && opt != _("ALSA sequencer")) { + return -1; + } + if (_run && _midi_driver_option != opt) { + return -1; + } + _midi_driver_option = opt; + return 0; } std::string AlsaAudioBackend::midi_option () const { - return ""; + return _midi_driver_option; +} + +int +AlsaAudioBackend::set_midi_device_enabled (std::string const device, bool enable) +{ + struct AlsaMidiDeviceInfo * nfo = midi_device_info(device); + if (!nfo) return -1; + const bool prev_enabled = nfo->enabled; + nfo->enabled = enable; + + if (_run && prev_enabled != enable) { + if (enable) { + // add ports for the given device + register_system_midi_ports(device); + } else { + // remove all ports provided by the given device + uint32_t i = 0; + for (std::vector::iterator it = _system_midi_out.begin (); it != _system_midi_out.end ();) { + assert (_rmidi_out.size() > i); + AlsaMidiOut *rm = _rmidi_out.at(i); + if (rm->name () != device) { ++it; ++i; continue; } + it = _system_midi_out.erase (it); + unregister_port (*it); + rm->stop(); + _rmidi_out.erase (_rmidi_out.begin() + i); + delete rm; + } + + i = 0; + for (std::vector::iterator it = _system_midi_in.begin (); it != _system_midi_in.end ();) { + assert (_rmidi_in.size() > i); + AlsaMidiIn *rm = _rmidi_in.at(i); + if (rm->name () != device) { ++it; ++i; continue; } + it = _system_midi_in.erase (it); + unregister_port (*it); + rm->stop(); + _rmidi_in.erase (_rmidi_in.begin() + i); + delete rm; + } + } + update_systemic_midi_latencies (); + } + return 0; +} + +bool +AlsaAudioBackend::midi_device_enabled (std::string const device) const +{ + struct AlsaMidiDeviceInfo * nfo = midi_device_info(device); + if (!nfo) return false; + return nfo->enabled; } /* State Control */ @@ -306,25 +799,129 @@ static void * pthread_process (void *arg) int AlsaAudioBackend::_start (bool for_latency_measurement) { - if (_running) { + if (!_active && _run) { + // recover from 'halted', reap threads + stop(); + } + + if (_active || _run) { PBD::error << _("AlsaAudioBackend: already active.") << endmsg; - return -1; + return BackendReinitializationError; } - if (_ports.size()) { + if (_ports.size () || _portmap.size ()) { PBD::warning << _("AlsaAudioBackend: recovering from unclean shutdown, port registry is not empty.") << endmsg; _system_inputs.clear(); _system_outputs.clear(); + _system_midi_in.clear(); + _system_midi_out.clear(); _ports.clear(); + _portmap.clear(); } + /* reset internal state */ + _dsp_load = 0; + _freewheeling = false; + _freewheel = false; + _last_process_start = 0; + + release_device(); + + assert(_rmidi_in.size() == 0); + assert(_rmidi_out.size() == 0); assert(_pcmi == 0); - _pcmi = new Alsa_pcmi (_capture_device.c_str(), _playback_device.c_str(), 0, _samplerate, _samples_per_period, _periods_per_cycle, 0); + int duplex = 0; + std::string audio_device; + std::string alsa_device; + std::map devices; + + if (_input_audio_device == get_standard_device_name(DeviceNone) && _output_audio_device == get_standard_device_name(DeviceNone)) { + PBD::error << _("AlsaAudioBackend: At least one of input or output device needs to be set."); + return AudioDeviceInvalidError; + } + + if (_input_audio_device != _output_audio_device) { + if (_input_audio_device != get_standard_device_name(DeviceNone) && _output_audio_device != get_standard_device_name(DeviceNone)) { + PBD::error << _("AlsaAudioBackend: Cannot use two different devices."); + return AudioDeviceInvalidError; + } + if (_input_audio_device != get_standard_device_name(DeviceNone)) { + get_alsa_audio_device_names(devices, HalfDuplexIn); + audio_device = _input_audio_device; + duplex = 1; + } else { + get_alsa_audio_device_names(devices, HalfDuplexOut); + audio_device = _output_audio_device; + duplex = 2; + } + } else { + get_alsa_audio_device_names(devices); + audio_device = _input_audio_device; + duplex = 3; + } + + for (std::map::const_iterator i = devices.begin (); i != devices.end(); ++i) { + if (i->first == audio_device) { + alsa_device = i->second; + break; + } + } + if (alsa_device == "") { + PBD::error << _("AlsaAudioBackend: Cannot find configured device. Is it still connected?"); + return AudioDeviceNotAvailableError; + } + + acquire_device(alsa_device.c_str()); + _pcmi = new Alsa_pcmi ( + (duplex & 2) ? alsa_device.c_str() : NULL, + (duplex & 1) ? alsa_device.c_str() : NULL, + /* ctrl name */ 0, + _samplerate, _samples_per_period, + _periods_per_cycle, /* _periods_per_cycle */ 2, + /* debug */ 0); + + AudioBackend::ErrorCode error_code = NoError; + switch (_pcmi->state()) { + case 0: /* OK */ + break; + case -1: + PBD::error << _("AlsaAudioBackend: failed to open device.") << endmsg; + error_code = AudioDeviceOpenError; + break; + case -2: + PBD::error << _("AlsaAudioBackend: failed to allocate parameters.") << endmsg; + error_code = AudioDeviceOpenError; + break; + case -3: + PBD::error << _("AlsaAudioBackend: cannot set requested sample rate.") + << endmsg; + error_code = SampleRateNotSupportedError; + break; + case -4: + PBD::error << _("AlsaAudioBackend: cannot set requested period size.") + << endmsg; + error_code = PeriodSizeNotSupportedError; + break; + case -5: + PBD::error << _("AlsaAudioBackend: cannot set requested number of periods.") + << endmsg; + error_code = PeriodCountNotSupportedError; + break; + case -6: + PBD::error << _("AlsaAudioBackend: unsupported sample format.") << endmsg; + error_code = SampleFormatNotSupportedError; + break; + default: + PBD::error << _("AlsaAudioBackend: initialization failed.") << endmsg; + error_code = AudioDeviceOpenError; + break; + } + if (_pcmi->state ()) { - PBD::error << _("AlsaAudioBackend: failed to open device (see stderr for details).") << endmsg; delete _pcmi; _pcmi = 0; - return -1; + release_device(); + return error_code; } #ifndef NDEBUG @@ -360,77 +957,100 @@ AlsaAudioBackend::_start (bool for_latency_measurement) PBD::warning << _("AlsaAudioBackend: sample rate does not match.") << endmsg; } - if (for_latency_measurement) { - _systemic_input_latency = 0; - _systemic_output_latency = 0; - } + _measure_latency = for_latency_measurement; - if (register_system_ports()) { + _midi_ins = _midi_outs = 0; + register_system_midi_ports(); + + if (register_system_audio_ports()) { PBD::error << _("AlsaAudioBackend: failed to register system ports.") << endmsg; delete _pcmi; _pcmi = 0; - return -1; + release_device(); + return PortRegistrationError; } + engine.sample_rate_change (_samplerate); + engine.buffer_size_change (_samples_per_period); + if (engine.reestablish_ports ()) { PBD::error << _("AlsaAudioBackend: Could not re-establish ports.") << endmsg; delete _pcmi; _pcmi = 0; - return -1; + release_device(); + return PortReconnectError; } - engine.buffer_size_change (_samples_per_period); engine.reconnect_ports (); + _run = true; + _port_change_flag = false; - if (_realtime_pthread_create (SCHED_FIFO, -20, + if (_realtime_pthread_create (SCHED_FIFO, -20, 100000, &_main_thread, pthread_process, this)) { if (pthread_create (&_main_thread, NULL, pthread_process, this)) { PBD::error << _("AlsaAudioBackend: failed to create process thread.") << endmsg; delete _pcmi; _pcmi = 0; - return -1; + release_device(); + _run = false; + return ProcessThreadStartError; } else { PBD::warning << _("AlsaAudioBackend: cannot acquire realtime permissions.") << endmsg; } } int timeout = 5000; - while (!_running && --timeout > 0) { Glib::usleep (1000); } + while (!_active && --timeout > 0) { Glib::usleep (1000); } - if (timeout == 0 || !_running) { + if (timeout == 0 || !_active) { PBD::error << _("AlsaAudioBackend: failed to start process thread.") << endmsg; delete _pcmi; _pcmi = 0; - return -1; + release_device(); + _run = false; + return ProcessThreadStartError; } - return 0; + return NoError; } int AlsaAudioBackend::stop () { void *status; - if (!_running) { + if (!_run) { return 0; } - _running = false; + _run = false; if (pthread_join (_main_thread, &status)) { PBD::error << _("AlsaAudioBackend: failed to terminate.") << endmsg; return -1; } - unregister_system_ports(); + + while (!_rmidi_out.empty ()) { + AlsaMidiIO *m = _rmidi_out.back (); + m->stop(); + _rmidi_out.pop_back (); + delete m; + } + while (!_rmidi_in.empty ()) { + AlsaMidiIO *m = _rmidi_in.back (); + m->stop(); + _rmidi_in.pop_back (); + delete m; + } + + unregister_ports(); delete _pcmi; _pcmi = 0; - return 0; + _midi_ins = _midi_outs = 0; + release_device(); + + return (_active == false) ? 0 : -1; } int AlsaAudioBackend::freewheel (bool onoff) { - if (onoff == _freewheeling) { - return 0; - } _freewheeling = onoff; - engine.freewheel_callback (onoff); return 0; } @@ -453,13 +1073,13 @@ AlsaAudioBackend::raw_buffer_size (DataType t) } /* Process time */ -pframes_t +framepos_t AlsaAudioBackend::sample_time () { return _processed_samples; } -pframes_t +framepos_t AlsaAudioBackend::sample_time_at_cycle_start () { return _processed_samples; @@ -468,7 +1088,15 @@ AlsaAudioBackend::sample_time_at_cycle_start () pframes_t AlsaAudioBackend::samples_since_cycle_start () { - return 0; + if (!_active || !_run || _freewheeling || _freewheel) { + return 0; + } + if (_last_process_start == 0) { + return 0; + } + + const int64_t elapsed_time_us = g_get_monotonic_time() - _last_process_start; + return std::max((pframes_t)0, (pframes_t)rint(1e-6 * elapsed_time_us * _samplerate)); } @@ -489,16 +1117,19 @@ AlsaAudioBackend::create_process_thread (boost::function func) pthread_attr_t attr; size_t stacksize = 100000; - pthread_attr_init (&attr); - pthread_attr_setstacksize (&attr, stacksize); ThreadData* td = new ThreadData (this, func, stacksize); - if (pthread_create (&thread_id, &attr, alsa_process_thread, td)) { - PBD::error << _("AudioEngine: cannot create process thread.") << endmsg; + if (_realtime_pthread_create (SCHED_FIFO, -21, stacksize, + &thread_id, alsa_process_thread, td)) { + pthread_attr_init (&attr); + pthread_attr_setstacksize (&attr, stacksize); + if (pthread_create (&thread_id, &attr, alsa_process_thread, td)) { + PBD::error << _("AudioEngine: cannot create process thread.") << endmsg; + pthread_attr_destroy (&attr); + return -1; + } pthread_attr_destroy (&attr); - return -1; } - pthread_attr_destroy (&attr); _threads.push_back (thread_id); return 0; @@ -524,6 +1155,10 @@ AlsaAudioBackend::join_process_threads () bool AlsaAudioBackend::in_process_thread () { + if (pthread_equal (_main_thread, pthread_self()) != 0) { + return true; + } + for (std::vector::const_iterator i = _threads.begin (); i != _threads.end (); ++i) { if (pthread_equal (*i, pthread_self ()) != 0) { @@ -542,6 +1177,8 @@ AlsaAudioBackend::process_thread_count () void AlsaAudioBackend::update_latencies () { + // trigger latency callback in RT thread (locked graph) + port_connect_add_remove_callback(); } /* PORTENGINE API */ @@ -561,7 +1198,7 @@ AlsaAudioBackend::my_name () const bool AlsaAudioBackend::available () const { - return true; + return _run && _active; } uint32_t @@ -573,23 +1210,63 @@ AlsaAudioBackend::port_name_size () const int AlsaAudioBackend::set_port_name (PortEngine::PortHandle port, const std::string& name) { + std::string newname (_instance_name + ":" + name); if (!valid_port (port)) { - PBD::error << _("AlsaBackend::set_port_name: Invalid Port(s)") << endmsg; + PBD::error << _("AlsaBackend::set_port_name: Invalid Port") << endmsg; + return -1; + } + if (find_port (newname)) { + PBD::error << _("AlsaBackend::set_port_name: Port with given name already exists") << endmsg; return -1; } - return static_cast(port)->set_name (_instance_name + ":" + name); + + AlsaPort* p = static_cast(port); + _portmap.erase (p->name()); + _portmap.insert (make_pair (newname, p)); + return p->set_name (newname); } std::string AlsaAudioBackend::get_port_name (PortEngine::PortHandle port) const { if (!valid_port (port)) { - PBD::error << _("AlsaBackend::get_port_name: Invalid Port(s)") << endmsg; + PBD::warning << _("AlsaBackend::get_port_name: Invalid Port(s)") << endmsg; return std::string (); } return static_cast(port)->name (); } +int +AlsaAudioBackend::get_port_property (PortHandle port, const std::string& key, std::string& value, std::string& type) const +{ + if (!valid_port (port)) { + PBD::warning << _("AlsaBackend::get_port_property: Invalid Port(s)") << endmsg; + return -1; + } + if (key == "http://jackaudio.org/metadata/pretty-name") { + type = ""; + value = static_cast(port)->pretty_name (); + if (!value.empty()) { + return 0; + } + } + return -1; +} + +int +AlsaAudioBackend::set_port_property (PortHandle port, const std::string& key, const std::string& value, const std::string& type) +{ + if (!valid_port (port)) { + PBD::warning << _("AlsaBackend::set_port_property: Invalid Port(s)") << endmsg; + return -1; + } + if (key == "http://jackaudio.org/metadata/pretty-name" && type.empty ()) { + static_cast(port)->set_pretty_name (value); + return 0; + } + return -1; +} + PortEngine::PortHandle AlsaAudioBackend::get_port_by_name (const std::string& name) const { @@ -611,9 +1288,10 @@ AlsaAudioBackend::get_ports ( use_regexp = true; } } - for (size_t i = 0; i < _ports.size (); ++i) { - AlsaPort* port = _ports[i]; - if ((port->type () == type) && (port->flags () & flags)) { + + for (PortIndex::const_iterator i = _ports.begin (); i != _ports.end (); ++i) { + AlsaPort* port = *i; + if ((port->type () == type) && flags == (port->flags () & flags)) { if (!use_regexp || !regexec (&port_regex, port->name ().c_str (), 0, NULL, 0)) { port_names.push_back (port->name ()); ++rv; @@ -671,7 +1349,8 @@ AlsaAudioBackend::add_port ( return 0; } - _ports.push_back (port); + _ports.insert (port); + _portmap.insert (make_pair (name, port)); return port; } @@ -679,86 +1358,178 @@ AlsaAudioBackend::add_port ( void AlsaAudioBackend::unregister_port (PortEngine::PortHandle port_handle) { - if (!valid_port (port_handle)) { - PBD::error << _("AlsaBackend::unregister_port: Invalid Port.") << endmsg; + if (!_run) { + return; } AlsaPort* port = static_cast(port_handle); - std::vector::iterator i = std::find (_ports.begin (), _ports.end (), static_cast(port_handle)); + PortIndex::iterator i = std::find (_ports.begin(), _ports.end(), static_cast(port_handle)); if (i == _ports.end ()) { PBD::error << _("AlsaBackend::unregister_port: Failed to find port") << endmsg; return; } disconnect_all(port_handle); + _portmap.erase (port->name()); _ports.erase (i); delete port; } int -AlsaAudioBackend::register_system_ports() +AlsaAudioBackend::register_system_audio_ports() { LatencyRange lr; - const int a_ins = _n_inputs > 0 ? _n_inputs : 2; - const int a_out = _n_outputs > 0 ? _n_outputs : 2; - const int m_ins = _n_midi_inputs > 0 ? _n_midi_inputs : 2; - const int m_out = _n_midi_outputs > 0 ? _n_midi_outputs : 2; + const int a_ins = _n_inputs; + const int a_out = _n_outputs; + + const uint32_t lcpp = (_periods_per_cycle - 2) * _samples_per_period; /* audio ports */ - lr.min = lr.max = _samples_per_period * _periods_per_cycle + _systemic_input_latency; + lr.min = lr.max = (_measure_latency ? 0 : _systemic_audio_input_latency); for (int i = 1; i <= a_ins; ++i) { char tmp[64]; snprintf(tmp, sizeof(tmp), "system:capture_%d", i); PortHandle p = add_port(std::string(tmp), DataType::AUDIO, static_cast(IsOutput | IsPhysical | IsTerminal)); if (!p) return -1; set_latency_range (p, false, lr); - _system_inputs.push_back(static_cast(p)); + AlsaPort *ap = static_cast(p); + //ap->set_pretty_name ("") + _system_inputs.push_back (ap); } - lr.min = lr.max = _samples_per_period * _periods_per_cycle + _systemic_output_latency; + lr.min = lr.max = lcpp + (_measure_latency ? 0 : _systemic_audio_output_latency); for (int i = 1; i <= a_out; ++i) { char tmp[64]; snprintf(tmp, sizeof(tmp), "system:playback_%d", i); PortHandle p = add_port(std::string(tmp), DataType::AUDIO, static_cast(IsInput | IsPhysical | IsTerminal)); if (!p) return -1; - set_latency_range (p, false, lr); - _system_outputs.push_back(static_cast(p)); + set_latency_range (p, true, lr); + AlsaPort *ap = static_cast(p); + //ap->set_pretty_name ("") + _system_outputs.push_back (ap); } + return 0; +} - /* midi ports */ - lr.min = lr.max = _samples_per_period + _systemic_input_latency; - for (int i = 1; i <= m_ins; ++i) { - char tmp[64]; - snprintf(tmp, sizeof(tmp), "system:midi_capture_%d", i); - PortHandle p = add_port(std::string(tmp), DataType::MIDI, static_cast(IsOutput | IsPhysical | IsTerminal)); - if (!p) return -1; - set_latency_range (p, false, lr); - } +int +AlsaAudioBackend::register_system_midi_ports(const std::string device) +{ + std::map devices; - lr.min = lr.max = _samples_per_period + _systemic_output_latency; - for (int i = 1; i <= m_out; ++i) { - char tmp[64]; - snprintf(tmp, sizeof(tmp), "system:midi_playback_%d", i); - PortHandle p = add_port(std::string(tmp), DataType::MIDI, static_cast(IsInput | IsPhysical | IsTerminal)); - if (!p) return -1; - set_latency_range (p, false, lr); + // TODO use consistent numbering when re-adding devices: _midi_ins, _midi_outs + + if (_midi_driver_option == get_standard_device_name(DeviceNone)) { + return 0; + } else if (_midi_driver_option == _("ALSA raw devices")) { + get_alsa_rawmidi_device_names(devices); + } else { + get_alsa_sequencer_names (devices); } + for (std::map::const_iterator i = devices.begin (); i != devices.end(); ++i) { + if (!device.empty() && device != i->first) { + continue; + } + struct AlsaMidiDeviceInfo * nfo = midi_device_info(i->first); + if (!nfo) continue; + if (!nfo->enabled) continue; + + AlsaMidiOut *mout; + if (_midi_driver_option == _("ALSA raw devices")) { + mout = new AlsaRawMidiOut (i->first, i->second.c_str()); + } else { + mout = new AlsaSeqMidiOut (i->first, i->second.c_str()); + } + + if (mout->state ()) { + PBD::warning << string_compose ( + _("AlsaMidiOut: failed to open midi device '%1'."), i->second) + << endmsg; + delete mout; + } else { + mout->setup_timing(_samples_per_period, _samplerate); + mout->sync_time (g_get_monotonic_time()); + if (mout->start ()) { + PBD::warning << string_compose ( + _("AlsaMidiOut: failed to start midi device '%1'."), i->second) + << endmsg; + delete mout; + } else { + char tmp[64]; + snprintf(tmp, sizeof(tmp), "system:midi_playback_%d", ++_midi_ins); + PortHandle p = add_port(std::string(tmp), DataType::MIDI, static_cast(IsInput | IsPhysical | IsTerminal)); + if (!p) { + mout->stop(); + delete mout; + } + LatencyRange lr; + lr.min = lr.max = (_measure_latency ? 0 : nfo->systemic_output_latency); + set_latency_range (p, true, lr); + static_cast(p)->set_n_periods(_periods_per_cycle); // TODO check MIDI alignment + AlsaPort *ap = static_cast(p); + ap->set_pretty_name (i->first); + _system_midi_out.push_back (ap); + _rmidi_out.push_back (mout); + } + } + + AlsaMidiIn *midin; + if (_midi_driver_option == _("ALSA raw devices")) { + midin = new AlsaRawMidiIn (i->first, i->second.c_str()); + } else { + midin = new AlsaSeqMidiIn (i->first, i->second.c_str()); + } + + if (midin->state ()) { + PBD::warning << string_compose ( + _("AlsaMidiIn: failed to open midi device '%1'."), i->second) + << endmsg; + delete midin; + } else { + midin->setup_timing(_samples_per_period, _samplerate); + midin->sync_time (g_get_monotonic_time()); + if (midin->start ()) { + PBD::warning << string_compose ( + _("AlsaMidiIn: failed to start midi device '%1'."), i->second) + << endmsg; + delete midin; + } else { + char tmp[64]; + snprintf(tmp, sizeof(tmp), "system:midi_capture_%d", ++_midi_outs); + PortHandle p = add_port(std::string(tmp), DataType::MIDI, static_cast(IsOutput | IsPhysical | IsTerminal)); + if (!p) { + midin->stop(); + delete midin; + continue; + } + LatencyRange lr; + lr.min = lr.max = (_measure_latency ? 0 : nfo->systemic_input_latency); + set_latency_range (p, false, lr); + AlsaPort *ap = static_cast(p); + ap->set_pretty_name (i->first); + _system_midi_in.push_back (ap); + _rmidi_in.push_back (midin); + } + } + } return 0; } void -AlsaAudioBackend::unregister_system_ports() +AlsaAudioBackend::unregister_ports (bool system_only) { - size_t i = 0; _system_inputs.clear(); _system_outputs.clear(); - while (i < _ports.size ()) { - AlsaPort* port = _ports[i]; - if (port->is_physical () && port->is_terminal ()) { + _system_midi_in.clear(); + _system_midi_out.clear(); + + for (PortIndex::iterator i = _ports.begin (); i != _ports.end ();) { + PortIndex::iterator cur = i++; + AlsaPort* port = *cur; + if (! system_only || (port->is_physical () && port->is_terminal ())) { port->disconnect_all (); - _ports.erase (_ports.begin() + i); - } else { - ++i; + _portmap.erase (port->name()); + delete port; + _ports.erase (cur); } } } @@ -847,10 +1618,12 @@ bool AlsaAudioBackend::connected_to (PortEngine::PortHandle src, const std::string& dst, bool /*process_callback_safe*/) { AlsaPort* dst_port = find_port (dst); +#ifndef NDEBUG if (!valid_port (src) || !dst_port) { PBD::error << _("AlsaBackend::connected_to: Invalid Port") << endmsg; return false; } +#endif return static_cast(src)->is_connected (dst_port); } @@ -874,9 +1647,9 @@ AlsaAudioBackend::get_connections (PortEngine::PortHandle port, std::vector& connected_ports = static_cast(port)->get_connections (); + const std::set& connected_ports = static_cast(port)->get_connections (); - for (std::vector::const_iterator i = connected_ports.begin (); i != connected_ports.end (); ++i) { + for (std::set::const_iterator i = connected_ports.begin (); i != connected_ports.end (); ++i) { names.push_back ((*i)->name ()); } @@ -912,9 +1685,11 @@ AlsaAudioBackend::midi_event_put ( assert (buffer && port_buffer); AlsaMidiBuffer& dst = * static_cast(port_buffer); if (dst.size () && (pframes_t)dst.back ()->timestamp () > timestamp) { +#ifndef NDEBUG + // nevermind, ::get_buffer() sorts events fprintf (stderr, "AlsaMidiBuffer: it's too late for this event. %d > %d\n", (pframes_t)dst.back ()->timestamp (), timestamp); - return -1; +#endif } dst.push_back (boost::shared_ptr(new AlsaMidiEvent (timestamp, buffer, size))); return 0; @@ -976,14 +1751,28 @@ AlsaAudioBackend::set_latency_range (PortEngine::PortHandle port, bool for_playb LatencyRange AlsaAudioBackend::get_latency_range (PortEngine::PortHandle port, bool for_playback) { + LatencyRange r; if (!valid_port (port)) { PBD::error << _("AlsaPort::get_latency_range (): invalid port.") << endmsg; - LatencyRange r; r.min = 0; r.max = 0; return r; } - return static_cast(port)->latency_range (for_playback); + AlsaPort *p = static_cast(port); + assert(p); + + r = p->latency_range (for_playback); + if (p->is_physical() && p->is_terminal()) { + if (p->is_input() && for_playback) { + r.min += _samples_per_period; + r.max += _samples_per_period; + } + if (p->is_output() && !for_playback) { + r.min += _samples_per_period; + r.max += _samples_per_period; + } + } + return r; } /* Discovering physical ports */ @@ -1001,8 +1790,8 @@ AlsaAudioBackend::port_is_physical (PortEngine::PortHandle port) const void AlsaAudioBackend::get_physical_outputs (DataType type, std::vector& port_names) { - for (size_t i = 0; i < _ports.size (); ++i) { - AlsaPort* port = _ports[i]; + for (PortIndex::iterator i = _ports.begin (); i != _ports.end (); ++i) { + AlsaPort* port = *i; if ((port->type () == type) && port->is_input () && port->is_physical ()) { port_names.push_back (port->name ()); } @@ -1012,8 +1801,8 @@ AlsaAudioBackend::get_physical_outputs (DataType type, std::vector& void AlsaAudioBackend::get_physical_inputs (DataType type, std::vector& port_names) { - for (size_t i = 0; i < _ports.size (); ++i) { - AlsaPort* port = _ports[i]; + for (PortIndex::iterator i = _ports.begin (); i != _ports.end (); ++i) { + AlsaPort* port = *i; if ((port->type () == type) && port->is_output () && port->is_physical ()) { port_names.push_back (port->name ()); } @@ -1025,8 +1814,8 @@ AlsaAudioBackend::n_physical_outputs () const { int n_midi = 0; int n_audio = 0; - for (size_t i = 0; i < _ports.size (); ++i) { - AlsaPort* port = _ports[i]; + for (PortIndex::const_iterator i = _ports.begin (); i != _ports.end (); ++i) { + AlsaPort* port = *i; if (port->is_output () && port->is_physical ()) { switch (port->type ()) { case DataType::AUDIO: ++n_audio; break; @@ -1046,8 +1835,8 @@ AlsaAudioBackend::n_physical_inputs () const { int n_midi = 0; int n_audio = 0; - for (size_t i = 0; i < _ports.size (); ++i) { - AlsaPort* port = _ports[i]; + for (PortIndex::const_iterator i = _ports.begin (); i != _ports.end (); ++i) { + AlsaPort* port = *i; if (port->is_input () && port->is_physical ()) { switch (port->type ()) { case DataType::AUDIO: ++n_audio; break; @@ -1077,29 +1866,47 @@ void * AlsaAudioBackend::main_process_thread () { AudioEngine::thread_init_callback (this); - _running = true; + _active = true; _processed_samples = 0; - uint64_t clock1, clock2; - clock1 = g_get_monotonic_time(); + uint64_t clock1; _pcmi->pcm_start (); int no_proc_errors = 0; + const int bailout = 2 * _samplerate / _samples_per_period; + + manager.registration_callback(); + manager.graph_order_callback(); - while (_running) { + while (_run) { long nr; bool xrun = false; - if (!_freewheeling) { + + if (_freewheeling != _freewheel) { + _freewheel = _freewheeling; + engine.freewheel_callback (_freewheel); + } + + if (!_freewheel) { nr = _pcmi->pcm_wait (); if (_pcmi->state () > 0) { ++no_proc_errors; xrun = true; } - if (_pcmi->state () < 0 || no_proc_errors > 50) { + if (_pcmi->state () < 0) { PBD::error << _("AlsaAudioBackend: I/O error. Audio Process Terminated.") << endmsg; break; } - while (nr >= (long)_samples_per_period) { + if (no_proc_errors > bailout) { + PBD::error + << string_compose ( + _("AlsaAudioBackend: Audio Process Terminated after %1 consecutive x-runs."), + no_proc_errors) + << endmsg; + break; + } + + while (nr >= (long)_samples_per_period && _freewheeling == _freewheel) { uint32_t i = 0; clock1 = g_get_monotonic_time(); no_proc_errors = 0; @@ -1110,15 +1917,51 @@ AlsaAudioBackend::main_process_thread () } _pcmi->capt_done (_samples_per_period); + /* de-queue incoming midi*/ + i = 0; + for (std::vector::const_iterator it = _system_midi_in.begin (); it != _system_midi_in.end (); ++it, ++i) { + assert (_rmidi_in.size() > i); + AlsaMidiIn *rm = _rmidi_in.at(i); + void *bptr = (*it)->get_buffer(0); + pframes_t time; + uint8_t data[64]; // match MaxAlsaEventSize in alsa_rawmidi.cc + size_t size = sizeof(data); + midi_clear(bptr); + while (rm->recv_event (time, data, size)) { + midi_event_put(bptr, time, data, size); + size = sizeof(data); + } + rm->sync_time (clock1); + } + for (std::vector::const_iterator it = _system_outputs.begin (); it != _system_outputs.end (); ++it) { memset ((*it)->get_buffer (_samples_per_period), 0, _samples_per_period * sizeof (Sample)); } + /* call engine process callback */ + _last_process_start = g_get_monotonic_time(); if (engine.process_callback (_samples_per_period)) { _pcmi->pcm_stop (); + _active = false; return 0; } + for (std::vector::iterator it = _system_midi_out.begin (); it != _system_midi_out.end (); ++it) { + static_cast(*it)->next_period(); + } + + /* queue outgoing midi */ + i = 0; + for (std::vector::const_iterator it = _system_midi_out.begin (); it != _system_midi_out.end (); ++it, ++i) { + assert (_rmidi_out.size() > i); + const AlsaMidiBuffer * src = static_cast(*it)->const_buffer(); + AlsaMidiOut *rm = _rmidi_out.at(i); + rm->sync_time (clock1); + for (AlsaMidiBuffer::const_iterator mit = src->begin (); mit != src->end (); ++mit) { + rm->send_event ((*mit)->timestamp(), (*mit)->data(), (*mit)->size()); + } + } + /* write back audio */ i = 0; _pcmi->play_init (_samples_per_period); @@ -1132,34 +1975,72 @@ AlsaAudioBackend::main_process_thread () nr -= _samples_per_period; _processed_samples += _samples_per_period; - /* calculate DSP load */ - clock2 = g_get_monotonic_time(); - const int64_t elapsed_time = clock2 - clock1; - const int64_t nomial_time = 1e6 * _samples_per_period / _samplerate; - _dsp_load = elapsed_time / (float) nomial_time; + _dsp_load_calc.set_max_time(_samplerate, _samples_per_period); + _dsp_load_calc.set_start_timestamp_us (clock1); + _dsp_load_calc.set_stop_timestamp_us (g_get_monotonic_time()); + _dsp_load = _dsp_load_calc.get_dsp_load (); } if (xrun && (_pcmi->capt_xrun() > 0 || _pcmi->play_xrun() > 0)) { engine.Xrun (); #if 0 - fprintf(stderr, "ALSA x-run read: %.1f ms, write: %.1f ms\n", + fprintf(stderr, "ALSA x-run read: %.2f ms, write: %.2f ms\n", _pcmi->capt_xrun() * 1000.0, _pcmi->play_xrun() * 1000.0); #endif } } else { // Freewheelin' + + // zero audio input buffers for (std::vector::const_iterator it = _system_inputs.begin (); it != _system_inputs.end (); ++it) { memset ((*it)->get_buffer (_samples_per_period), 0, _samples_per_period * sizeof (Sample)); } + + clock1 = g_get_monotonic_time(); + uint32_t i = 0; + for (std::vector::const_iterator it = _system_midi_in.begin (); it != _system_midi_in.end (); ++it, ++i) { + static_cast((*it)->get_buffer(0))->clear (); + AlsaMidiIn *rm = _rmidi_in.at(i); + void *bptr = (*it)->get_buffer(0); + midi_clear(bptr); // zero midi buffer + + // TODO add an API call for this. + pframes_t time; + uint8_t data[64]; // match MaxAlsaEventSize in alsa_rawmidi.cc + size_t size = sizeof(data); + while (rm->recv_event (time, data, size)) { + ; // discard midi-data from HW. + } + rm->sync_time (clock1); + } + + _last_process_start = 0; if (engine.process_callback (_samples_per_period)) { _pcmi->pcm_stop (); + _active = false; return 0; } + + // drop all outgoing MIDI messages + for (std::vector::const_iterator it = _system_midi_out.begin (); it != _system_midi_out.end (); ++it) { + void *bptr = (*it)->get_buffer(0); + midi_clear(bptr); + } + _dsp_load = 1.0; Glib::usleep (100); // don't hog cpu } + bool connections_changed = false; + bool ports_changed = false; if (!pthread_mutex_trylock (&_port_callback_mutex)) { + if (_port_change_flag) { + ports_changed = true; + _port_change_flag = false; + } + if (!_port_connection_queue.empty ()) { + connections_changed = true; + } while (!_port_connection_queue.empty ()) { PortConnectData *c = _port_connection_queue.back (); manager.connect_callback (c->a, c->b, c->c); @@ -1168,9 +2049,23 @@ AlsaAudioBackend::main_process_thread () } pthread_mutex_unlock (&_port_callback_mutex); } + if (ports_changed) { + manager.registration_callback(); + } + if (connections_changed) { + manager.graph_order_callback(); + } + if (connections_changed || ports_changed) { + engine.latency_callback(false); + engine.latency_callback(true); + } } _pcmi->pcm_stop (); + _active = false; + if (_run) { + engine.halted_callback("ALSA I/O error."); + } return 0; } @@ -1183,13 +2078,15 @@ static boost::shared_ptr backend_factory (AudioEngine& e); static int instantiate (const std::string& arg1, const std::string& /* arg2 */); static int deinstantiate (); static bool already_configured (); +static bool available (); static ARDOUR::AudioBackendInfo _descriptor = { - "Alsa", + "ALSA", instantiate, deinstantiate, backend_factory, already_configured, + available }; static boost::shared_ptr @@ -1221,6 +2118,12 @@ already_configured () return false; } +static bool +available () +{ + return true; +} + extern "C" ARDOURBACKEND_API ARDOUR::AudioBackendInfo* descriptor () { return &_descriptor; @@ -1287,7 +2190,7 @@ int AlsaPort::connect (AlsaPort *port) void AlsaPort::_connect (AlsaPort *port, bool callback) { - _connections.push_back (port); + _connections.insert (port); if (callback) { port->_connect (this, false); _alsa_backend.port_connect_callback (name(), port->name(), true); @@ -1313,12 +2216,9 @@ int AlsaPort::disconnect (AlsaPort *port) void AlsaPort::_disconnect (AlsaPort *port, bool callback) { - std::vector::iterator it = std::find (_connections.begin (), _connections.end (), port); - + std::set::iterator it = _connections.find (port); assert (it != _connections.end ()); - _connections.erase (it); - if (callback) { port->_disconnect (this, false); _alsa_backend.port_connect_callback (name(), port->name(), false); @@ -1329,21 +2229,22 @@ void AlsaPort::_disconnect (AlsaPort *port, bool callback) void AlsaPort::disconnect_all () { while (!_connections.empty ()) { - _connections.back ()->_disconnect (this, false); - _alsa_backend.port_connect_callback (name(), _connections.back ()->name(), false); - _connections.pop_back (); + std::set::iterator it = _connections.begin (); + (*it)->_disconnect (this, false); + _alsa_backend.port_connect_callback (name(), (*it)->name(), false); + _connections.erase (it); } } bool AlsaPort::is_connected (const AlsaPort *port) const { - return std::find (_connections.begin (), _connections.end (), port) != _connections.end (); + return _connections.find (const_cast(port)) != _connections.end (); } bool AlsaPort::is_physically_connected () const { - for (std::vector::const_iterator it = _connections.begin (); it != _connections.end (); ++it) { + for (std::set::const_iterator it = _connections.begin (); it != _connections.end (); ++it) { if ((*it)->is_physical ()) { return true; } @@ -1365,14 +2266,15 @@ AlsaAudioPort::~AlsaAudioPort () { } void* AlsaAudioPort::get_buffer (pframes_t n_samples) { if (is_input ()) { - std::vector::const_iterator it = get_connections ().begin (); - if (it == get_connections ().end ()) { + const std::set& connections = get_connections (); + std::set::const_iterator it = connections.begin (); + if (it == connections.end ()) { memset (_buffer, 0, n_samples * sizeof (Sample)); } else { AlsaAudioPort const * source = static_cast(*it); assert (source && source->is_output ()); memcpy (_buffer, source->const_buffer (), n_samples * sizeof (Sample)); - while (++it != get_connections ().end ()) { + while (++it != connections.end ()) { source = static_cast(*it); assert (source && source->is_output ()); Sample* dst = buffer (); @@ -1389,8 +2291,11 @@ void* AlsaAudioPort::get_buffer (pframes_t n_samples) AlsaMidiPort::AlsaMidiPort (AlsaAudioBackend &b, const std::string& name, PortFlags flags) : AlsaPort (b, name, flags) + , _n_periods (1) + , _bufperiod (0) { - _buffer.clear (); + _buffer[0].clear (); + _buffer[1].clear (); } AlsaMidiPort::~AlsaMidiPort () { } @@ -1404,18 +2309,19 @@ struct MidiEventSorter { void* AlsaMidiPort::get_buffer (pframes_t /* nframes */) { if (is_input ()) { - _buffer.clear (); - for (std::vector::const_iterator i = get_connections ().begin (); - i != get_connections ().end (); + (_buffer[_bufperiod]).clear (); + const std::set& connections = get_connections (); + for (std::set::const_iterator i = connections.begin (); + i != connections.end (); ++i) { - const AlsaMidiBuffer src = static_cast(*i)->const_buffer (); - for (AlsaMidiBuffer::const_iterator it = src.begin (); it != src.end (); ++it) { - _buffer.push_back (boost::shared_ptr(new AlsaMidiEvent (**it))); + const AlsaMidiBuffer * src = static_cast(*i)->const_buffer (); + for (AlsaMidiBuffer::const_iterator it = src->begin (); it != src->end (); ++it) { + (_buffer[_bufperiod]).push_back (boost::shared_ptr(new AlsaMidiEvent (**it))); } } - std::sort (_buffer.begin (), _buffer.end (), MidiEventSorter()); + std::sort ((_buffer[_bufperiod]).begin (), (_buffer[_bufperiod]).end (), MidiEventSorter()); } - return &_buffer; + return &(_buffer[_bufperiod]); } AlsaMidiEvent::AlsaMidiEvent (const pframes_t timestamp, const uint8_t* data, size_t size)