diff options
| -rw-r--r-- | gtk2_ardour/ardev_common.sh.in | 2 | ||||
| -rw-r--r-- | libs/backends/alsa/alsa_audiobackend.cc | 1445 | ||||
| -rw-r--r-- | libs/backends/alsa/alsa_audiobackend.h | 365 | ||||
| -rw-r--r-- | libs/backends/alsa/rt_thread.h | 56 | ||||
| -rw-r--r-- | libs/backends/alsa/wscript | 39 | ||||
| -rw-r--r-- | libs/backends/alsa/zita-alsa-pcmi.cc | 1127 | ||||
| -rw-r--r-- | libs/backends/alsa/zita-alsa-pcmi.h | 188 | ||||
| -rw-r--r-- | libs/backends/wscript | 8 |
8 files changed, 3229 insertions, 1 deletions
diff --git a/gtk2_ardour/ardev_common.sh.in b/gtk2_ardour/ardev_common.sh.in index e5a424af6a..0e7f76d754 100644 --- a/gtk2_ardour/ardev_common.sh.in +++ b/gtk2_ardour/ardev_common.sh.in @@ -17,7 +17,7 @@ export ARDOUR_DATA_PATH=$TOP:$TOP/build:$TOP/gtk2_ardour:$TOP/build/gtk2_ardour: export ARDOUR_MIDIMAPS_PATH=$TOP/midi_maps:. export ARDOUR_MCP_PATH=$TOP/mcp:. export ARDOUR_EXPORT_FORMATS_PATH=$TOP/export:. -export ARDOUR_BACKEND_PATH=$libs/backends/jack:$libs/backends/wavesaudio:$libs/backends/dummy +export ARDOUR_BACKEND_PATH=$libs/backends/jack:$libs/backends/wavesaudio:$libs/backends/dummy:$libs/backends/alsa export ARDOUR_TEST_PATH=$libs/ardour/test/data # diff --git a/libs/backends/alsa/alsa_audiobackend.cc b/libs/backends/alsa/alsa_audiobackend.cc new file mode 100644 index 0000000000..34f28b24aa --- /dev/null +++ b/libs/backends/alsa/alsa_audiobackend.cc @@ -0,0 +1,1445 @@ +/* + * Copyright (C) 2014 Robin Gareus <robin@gareus.org> + * Copyright (C) 2013 Paul Davis + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + */ + +#include <regex.h> +#include <sys/mman.h> +#include <sys/time.h> + +#include <glibmm.h> + +#include "alsa_audiobackend.h" +#include "rt_thread.h" + +#include "pbd/error.h" +#include "ardour/port_manager.h" +#include "i18n.h" + +using namespace ARDOUR; + +static std::string s_instance_name; +size_t AlsaAudioBackend::_max_buffer_size = 8192; + +AlsaAudioBackend::AlsaAudioBackend (AudioEngine& e, AudioBackendInfo& info) + : AudioBackend (e, info) + , _pcmi (0) + , _running (false) + , _freewheeling (false) + , _capture_device("") + , _playback_device("") + , _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) + , _processed_samples (0) +{ + _instance_name = s_instance_name; + pthread_mutex_init (&_port_callback_mutex, 0); +} + +AlsaAudioBackend::~AlsaAudioBackend () +{ + pthread_mutex_destroy (&_port_callback_mutex); +} + +/* AUDIOBACKEND API */ + +std::string +AlsaAudioBackend::name () const +{ + return X_("ALSA"); +} + +bool +AlsaAudioBackend::is_realtime () const +{ + return true; +} + +std::vector<AudioBackend::DeviceStatus> +AlsaAudioBackend::enumerate_devices () const +{ + std::vector<AudioBackend::DeviceStatus> s; + int cardnum = -1; + snd_ctl_card_info_t *info; + snd_ctl_card_info_alloca (&info); + + // TODO re-use code from libs/backends/jack/jack_utils.cc + while (snd_card_next (&cardnum) >= 0 && cardnum >= 0) { + snd_ctl_t *handle; + + std::string 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) { + //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); + } + } + return s; +} + +std::vector<float> +AlsaAudioBackend::available_sample_rates (const std::string&) const +{ + std::vector<float> 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); + return sr; +} + +std::vector<uint32_t> +AlsaAudioBackend::available_buffer_sizes (const std::string&) const +{ + std::vector<uint32_t> 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); + return bs; +} + +uint32_t +AlsaAudioBackend::available_input_channel_count (const std::string&) const +{ + return 128; // TODO query current device +} + +uint32_t +AlsaAudioBackend::available_output_channel_count (const std::string&) const +{ + return 128; // TODO query current device +} + +bool +AlsaAudioBackend::can_change_sample_rate_when_running () const +{ + return false; +} + +bool +AlsaAudioBackend::can_change_buffer_size_when_running () const +{ + return false; +} + +int +AlsaAudioBackend::set_device_name (const std::string& d) +{ + _capture_device = d; + _playback_device = d; + return 0; +} + +int +AlsaAudioBackend::set_sample_rate (float sr) +{ + if (sr <= 0) { return -1; } + _samplerate = sr; + engine.sample_rate_change (sr); + return 0; +} + +int +AlsaAudioBackend::set_buffer_size (uint32_t bs) +{ + if (bs <= 0 || bs >= _max_buffer_size) { + return -1; + } + _samples_per_period = bs; + engine.buffer_size_change (bs); + return 0; +} + +int +AlsaAudioBackend::set_interleaved (bool yn) +{ + if (!yn) { return 0; } + return -1; +} + +int +AlsaAudioBackend::set_input_channels (uint32_t cc) +{ + _n_inputs = cc; + return 0; +} + +int +AlsaAudioBackend::set_output_channels (uint32_t cc) +{ + _n_outputs = cc; + return 0; +} + +int +AlsaAudioBackend::set_systemic_input_latency (uint32_t sl) +{ + _systemic_input_latency = sl; + return 0; +} + +int +AlsaAudioBackend::set_systemic_output_latency (uint32_t sl) +{ + _systemic_output_latency = sl; + return 0; +} + +/* Retrieving parameters */ +std::string +AlsaAudioBackend::device_name () const +{ + return _capture_device; +} + +float +AlsaAudioBackend::sample_rate () const +{ + return _samplerate; +} + +uint32_t +AlsaAudioBackend::buffer_size () const +{ + return _samples_per_period; +} + +bool +AlsaAudioBackend::interleaved () const +{ + return false; +} + +uint32_t +AlsaAudioBackend::input_channels () const +{ + return _n_inputs; +} + +uint32_t +AlsaAudioBackend::output_channels () const +{ + return _n_outputs; +} + +uint32_t +AlsaAudioBackend::systemic_input_latency () const +{ + return _systemic_input_latency; +} + +uint32_t +AlsaAudioBackend::systemic_output_latency () const +{ + return _systemic_output_latency; +} + +/* MIDI */ +std::vector<std::string> +AlsaAudioBackend::enumerate_midi_options () const +{ + std::vector<std::string> m; + m.push_back (_("-None-")); + return m; +} + +int +AlsaAudioBackend::set_midi_option (const std::string& /* opt*/) +{ + return -1; +} + +std::string +AlsaAudioBackend::midi_option () const +{ + return ""; +} + +/* State Control */ + +static void * pthread_process (void *arg) +{ + AlsaAudioBackend *d = static_cast<AlsaAudioBackend *>(arg); + d->main_process_thread (); + pthread_exit (0); + return 0; +} + +int +AlsaAudioBackend::_start (bool for_latency_measurement) +{ + if (_running) { + PBD::error << _("AlsaAudioBackend: already active.") << endmsg; + return -1; + } + + if (_ports.size()) { + PBD::warning << _("AlsaAudioBackend: recovering from unclean shutdown, port registry is not empty.") << endmsg; + _system_inputs.clear(); + _system_outputs.clear(); + _ports.clear(); + } + + assert(_pcmi == 0); + + _pcmi = new Alsa_pcmi (_capture_device.c_str(), _playback_device.c_str(), 0, _samplerate, _samples_per_period, _periods_per_cycle, 0); + if (_pcmi->state ()) { + PBD::error << _("AlsaAudioBackend: failed to open device (see stderr for details).") << endmsg; + delete _pcmi; _pcmi = 0; + return -1; + } + +#ifndef NDEBUG + _pcmi->printinfo (); +#endif + + if (_n_outputs != _pcmi->nplay ()) { + if (_n_outputs == 0) { + _n_outputs = _pcmi->nplay (); + } else { + _n_outputs = std::min (_n_outputs, _pcmi->nplay ()); + } + PBD::warning << _("AlsaAudioBackend: adjusted output channel count to match device.") << endmsg; + } + + if (_n_inputs != _pcmi->ncapt ()) { + if (_n_inputs == 0) { + _n_inputs = _pcmi->ncapt (); + } else { + _n_inputs = std::min (_n_inputs, _pcmi->ncapt ()); + } + PBD::warning << _("AlsaAudioBackend: adjusted input channel count to match device.") << endmsg; + } + + if (_pcmi->fsize() != _samples_per_period) { + _samples_per_period = _pcmi->fsize(); + PBD::warning << _("AlsaAudioBackend: samples per period does not match.") << endmsg; + } + + if (_pcmi->fsamp() != _samplerate) { + _samplerate = _pcmi->fsamp(); + engine.sample_rate_change (_samplerate); + PBD::warning << _("AlsaAudioBackend: sample rate does not match.") << endmsg; + } + + if (for_latency_measurement) { + _systemic_input_latency = 0; + _systemic_output_latency = 0; + } + + if (register_system_ports()) { + PBD::error << _("AlsaAudioBackend: failed to register system ports.") << endmsg; + delete _pcmi; _pcmi = 0; + return -1; + } + + if (engine.reestablish_ports ()) { + PBD::error << _("AlsaAudioBackend: Could not re-establish ports.") << endmsg; + delete _pcmi; _pcmi = 0; + return -1; + } + + engine.buffer_size_change (_samples_per_period); + engine.reconnect_ports (); + + if (_realtime_pthread_create (SCHED_FIFO, -20, + &_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; + } else { + PBD::warning << _("AlsaAudioBackend: cannot acquire realtime permissions.") << endmsg; + } + } + + int timeout = 5000; + while (!_running && --timeout > 0) { Glib::usleep (1000); } + + if (timeout == 0 || !_running) { + PBD::error << _("AlsaAudioBackend: failed to start process thread.") << endmsg; + delete _pcmi; _pcmi = 0; + return -1; + } + + return 0; +} + +int +AlsaAudioBackend::stop () +{ + void *status; + if (!_running) { + return 0; + } + + _running = false; + if (pthread_join (_main_thread, &status)) { + PBD::error << _("AlsaAudioBackend: failed to terminate.") << endmsg; + return -1; + } + unregister_system_ports(); + delete _pcmi; _pcmi = 0; + return 0; +} + +int +AlsaAudioBackend::freewheel (bool onoff) +{ + if (onoff == _freewheeling) { + return 0; + } + _freewheeling = onoff; + engine.freewheel_callback (onoff); + return 0; +} + +float +AlsaAudioBackend::dsp_load () const +{ + return 100.f * _dsp_load; +} + +size_t +AlsaAudioBackend::raw_buffer_size (DataType t) +{ + switch (t) { + case DataType::AUDIO: + return _samples_per_period * sizeof(Sample); + case DataType::MIDI: + return _max_buffer_size; // XXX not really limited + } + return 0; +} + +/* Process time */ +pframes_t +AlsaAudioBackend::sample_time () +{ + return _processed_samples; +} + +pframes_t +AlsaAudioBackend::sample_time_at_cycle_start () +{ + return _processed_samples; +} + +pframes_t +AlsaAudioBackend::samples_since_cycle_start () +{ + return 0; +} + + +void * +AlsaAudioBackend::alsa_process_thread (void *arg) +{ + ThreadData* td = reinterpret_cast<ThreadData*> (arg); + boost::function<void ()> f = td->f; + delete td; + f (); + return 0; +} + +int +AlsaAudioBackend::create_process_thread (boost::function<void()> func) +{ + pthread_t thread_id; + 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; + pthread_attr_destroy (&attr); + return -1; + } + pthread_attr_destroy (&attr); + + _threads.push_back (thread_id); + return 0; +} + +int +AlsaAudioBackend::join_process_threads () +{ + int rv = 0; + + for (std::vector<pthread_t>::const_iterator i = _threads.begin (); i != _threads.end (); ++i) + { + void *status; + if (pthread_join (*i, &status)) { + PBD::error << _("AudioEngine: cannot terminate process thread.") << endmsg; + rv -= 1; + } + } + _threads.clear (); + return rv; +} + +bool +AlsaAudioBackend::in_process_thread () +{ + for (std::vector<pthread_t>::const_iterator i = _threads.begin (); i != _threads.end (); ++i) + { + if (pthread_equal (*i, pthread_self ()) != 0) { + return true; + } + } + return false; +} + +uint32_t +AlsaAudioBackend::process_thread_count () +{ + return _threads.size (); +} + +void +AlsaAudioBackend::update_latencies () +{ +} + +/* PORTENGINE API */ + +void* +AlsaAudioBackend::private_handle () const +{ + return NULL; +} + +const std::string& +AlsaAudioBackend::my_name () const +{ + return _instance_name; +} + +bool +AlsaAudioBackend::available () const +{ + return true; +} + +uint32_t +AlsaAudioBackend::port_name_size () const +{ + return 256; +} + +int +AlsaAudioBackend::set_port_name (PortEngine::PortHandle port, const std::string& name) +{ + if (!valid_port (port)) { + PBD::error << _("AlsaBackend::set_port_name: Invalid Port(s)") << endmsg; + return -1; + } + return static_cast<AlsaPort*>(port)->set_name (_instance_name + ":" + name); +} + +std::string +AlsaAudioBackend::get_port_name (PortEngine::PortHandle port) const +{ + if (!valid_port (port)) { + PBD::error << _("AlsaBackend::get_port_name: Invalid Port(s)") << endmsg; + return std::string (); + } + return static_cast<AlsaPort*>(port)->name (); +} + +PortEngine::PortHandle +AlsaAudioBackend::get_port_by_name (const std::string& name) const +{ + PortHandle port = (PortHandle) find_port (name); + return port; +} + +int +AlsaAudioBackend::get_ports ( + const std::string& port_name_pattern, + DataType type, PortFlags flags, + std::vector<std::string>& port_names) const +{ + int rv = 0; + regex_t port_regex; + bool use_regexp = false; + if (port_name_pattern.size () > 0) { + if (!regcomp (&port_regex, port_name_pattern.c_str (), REG_EXTENDED|REG_NOSUB)) { + use_regexp = true; + } + } + for (size_t i = 0; i < _ports.size (); ++i) { + AlsaPort* port = _ports[i]; + if ((port->type () == type) && (port->flags () & flags)) { + if (!use_regexp || !regexec (&port_regex, port->name ().c_str (), 0, NULL, 0)) { + port_names.push_back (port->name ()); + ++rv; + } + } + } + if (use_regexp) { + regfree (&port_regex); + } + return rv; +} + +DataType +AlsaAudioBackend::port_data_type (PortEngine::PortHandle port) const +{ + if (!valid_port (port)) { + return DataType::NIL; + } + return static_cast<AlsaPort*>(port)->type (); +} + +PortEngine::PortHandle +AlsaAudioBackend::register_port ( + const std::string& name, + ARDOUR::DataType type, + ARDOUR::PortFlags flags) +{ + if (name.size () == 0) { return 0; } + if (flags & IsPhysical) { return 0; } + return add_port (_instance_name + ":" + name, type, flags); +} + +PortEngine::PortHandle +AlsaAudioBackend::add_port ( + const std::string& name, + ARDOUR::DataType type, + ARDOUR::PortFlags flags) +{ + assert(name.size ()); + if (find_port (name)) { + PBD::error << _("AlsaBackend::register_port: Port already exists:") + << " (" << name << ")" << endmsg; + return 0; + } + AlsaPort* port = NULL; + switch (type) { + case DataType::AUDIO: + port = new AlsaAudioPort (*this, name, flags); + break; + case DataType::MIDI: + port = new AlsaMidiPort (*this, name, flags); + break; + default: + PBD::error << _("AlsaBackend::register_port: Invalid Data Type.") << endmsg; + return 0; + } + + _ports.push_back (port); + + return port; +} + +void +AlsaAudioBackend::unregister_port (PortEngine::PortHandle port_handle) +{ + if (!valid_port (port_handle)) { + PBD::error << _("AlsaBackend::unregister_port: Invalid Port.") << endmsg; + } + AlsaPort* port = static_cast<AlsaPort*>(port_handle); + std::vector<AlsaPort*>::iterator i = std::find (_ports.begin (), _ports.end (), static_cast<AlsaPort*>(port_handle)); + if (i == _ports.end ()) { + PBD::error << _("AlsaBackend::unregister_port: Failed to find port") << endmsg; + return; + } + disconnect_all(port_handle); + _ports.erase (i); + delete port; +} + +int +AlsaAudioBackend::register_system_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; + + /* audio ports */ + lr.min = lr.max = _samples_per_period * _periods_per_cycle + _systemic_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<PortFlags>(IsOutput | IsPhysical | IsTerminal)); + if (!p) return -1; + set_latency_range (p, false, lr); + _system_inputs.push_back(static_cast<AlsaPort*>(p)); + } + + lr.min = lr.max = _samples_per_period * _periods_per_cycle + _systemic_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<PortFlags>(IsInput | IsPhysical | IsTerminal)); + if (!p) return -1; + set_latency_range (p, false, lr); + _system_outputs.push_back(static_cast<AlsaPort*>(p)); + } + + /* 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<PortFlags>(IsOutput | IsPhysical | IsTerminal)); + if (!p) return -1; + set_latency_range (p, false, lr); + } + + 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<PortFlags>(IsInput | IsPhysical | IsTerminal)); + if (!p) return -1; + set_latency_range (p, false, lr); + } + + return 0; +} + +void +AlsaAudioBackend::unregister_system_ports() +{ + 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 ()) { + port->disconnect_all (); + _ports.erase (_ports.begin() + i); + } else { + ++i; + } + } +} + +int +AlsaAudioBackend::connect (const std::string& src, const std::string& dst) +{ + AlsaPort* src_port = find_port (src); + AlsaPort* dst_port = find_port (dst); + + if (!src_port) { + PBD::error << _("AlsaBackend::connect: Invalid Source port:") + << " (" << src <<")" << endmsg; + return -1; + } + if (!dst_port) { + PBD::error << _("AlsaBackend::connect: Invalid Destination port:") + << " (" << dst <<")" << endmsg; + return -1; + } + return src_port->connect (dst_port); +} + +int +AlsaAudioBackend::disconnect (const std::string& src, const std::string& dst) +{ + AlsaPort* src_port = find_port (src); + AlsaPort* dst_port = find_port (dst); + + if (!src_port || !dst_port) { + PBD::error << _("AlsaBackend::disconnect: Invalid Port(s)") << endmsg; + return -1; + } + return src_port->disconnect (dst_port); +} + +int +AlsaAudioBackend::connect (PortEngine::PortHandle src, const std::string& dst) +{ + AlsaPort* dst_port = find_port (dst); + if (!valid_port (src)) { + PBD::error << _("AlsaBackend::connect: Invalid Source Port Handle") << endmsg; + return -1; + } + if (!dst_port) { + PBD::error << _("AlsaBackend::connect: Invalid Destination Port") + << " (" << dst << ")" << endmsg; + return -1; + } + return static_cast<AlsaPort*>(src)->connect (dst_port); +} + +int +AlsaAudioBackend::disconnect (PortEngine::PortHandle src, const std::string& dst) +{ + AlsaPort* dst_port = find_port (dst); + if (!valid_port (src) || !dst_port) { + PBD::error << _("AlsaBackend::disconnect: Invalid Port(s)") << endmsg; + return -1; + } + return static_cast<AlsaPort*>(src)->disconnect (dst_port); +} + +int +AlsaAudioBackend::disconnect_all (PortEngine::PortHandle port) +{ + if (!valid_port (port)) { + PBD::error << _("AlsaBackend::disconnect_all: Invalid Port") << endmsg; + return -1; + } + static_cast<AlsaPort*>(port)->disconnect_all (); + return 0; +} + +bool +AlsaAudioBackend::connected (PortEngine::PortHandle port, bool /* process_callback_safe*/) +{ + if (!valid_port (port)) { + PBD::error << _("AlsaBackend::disconnect_all: Invalid Port") << endmsg; + return false; + } + return static_cast<AlsaPort*>(port)->is_connected (); +} + +bool +AlsaAudioBackend::connected_to (PortEngine::PortHandle src, const std::string& dst, bool /*process_callback_safe*/) +{ + AlsaPort* dst_port = find_port (dst); + if (!valid_port (src) || !dst_port) { + PBD::error << _("AlsaBackend::connected_to: Invalid Port") << endmsg; + return false; + } + return static_cast<AlsaPort*>(src)->is_connected (dst_port); +} + +bool +AlsaAudioBackend::physically_connected (PortEngine::PortHandle port, bool /*process_callback_safe*/) +{ + if (!valid_port (port)) { + PBD::error << _("AlsaBackend::physically_connected: Invalid Port") << endmsg; + return false; + } + return static_cast<AlsaPort*>(port)->is_physically_connected (); +} + +int +AlsaAudioBackend::get_connections (PortEngine::PortHandle port, std::vector<std::string>& names, bool /*process_callback_safe*/) +{ + if (!valid_port (port)) { + PBD::error << _("AlsaBackend::get_connections: Invalid Port") << endmsg; + return -1; + } + + assert (0 == names.size ()); + + const std::vector<AlsaPort*>& connected_ports = static_cast<AlsaPort*>(port)->get_connections (); + + for (std::vector<AlsaPort*>::const_iterator i = connected_ports.begin (); i != connected_ports.end (); ++i) { + names.push_back ((*i)->name ()); + } + + return (int)names.size (); +} + +/* MIDI */ +int +AlsaAudioBackend::midi_event_get ( + pframes_t& timestamp, + size_t& size, uint8_t** buf, void* port_buffer, + uint32_t event_index) +{ + assert (buf && port_buffer); + AlsaMidiBuffer& source = * static_cast<AlsaMidiBuffer*>(port_buffer); + if (event_index >= source.size ()) { + return -1; + } + AlsaMidiEvent * const event = source[event_index].get (); + + timestamp = event->timestamp (); + size = event->size (); + *buf = event->data (); + return 0; +} + +int +AlsaAudioBackend::midi_event_put ( + void* port_buffer, + pframes_t timestamp, + const uint8_t* buffer, size_t size) +{ + assert (buffer && port_buffer); + AlsaMidiBuffer& dst = * static_cast<AlsaMidiBuffer*>(port_buffer); + if (dst.size () && (pframes_t)dst.back ()->timestamp () > timestamp) { + fprintf (stderr, "AlsaMidiBuffer: it's too late for this event. %d > %d\n", + (pframes_t)dst.back ()->timestamp (), timestamp); + return -1; + } + dst.push_back (boost::shared_ptr<AlsaMidiEvent>(new AlsaMidiEvent (timestamp, buffer, size))); + return 0; +} + +uint32_t +AlsaAudioBackend::get_midi_event_count (void* port_buffer) +{ + assert (port_buffer); + return static_cast<AlsaMidiBuffer*>(port_buffer)->size (); +} + +void +AlsaAudioBackend::midi_clear (void* port_buffer) +{ + assert (port_buffer); + AlsaMidiBuffer * buf = static_cast<AlsaMidiBuffer*>(port_buffer); + assert (buf); + buf->clear (); +} + +/* Monitoring */ + +bool +AlsaAudioBackend::can_monitor_input () const +{ + return false; +} + +int +AlsaAudioBackend::request_input_monitoring (PortEngine::PortHandle, bool) +{ + return -1; +} + +int +AlsaAudioBackend::ensure_input_monitoring (PortEngine::PortHandle, bool) +{ + return -1; +} + +bool +AlsaAudioBackend::monitoring_input (PortEngine::PortHandle) +{ + return false; +} + +/* Latency management */ + +void +AlsaAudioBackend::set_latency_range (PortEngine::PortHandle port, bool for_playback, LatencyRange latency_range) +{ + if (!valid_port (port)) { + PBD::error << _("AlsaPort::set_latency_range (): invalid port.") << endmsg; + } + static_cast<AlsaPort*>(port)->set_latency_range (latency_range, for_playback); +} + +LatencyRange +AlsaAudioBackend::get_latency_range (PortEngine::PortHandle port, bool for_playback) +{ + 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<AlsaPort*>(port)->latency_range (for_playback); +} + +/* Discovering physical ports */ + +bool +AlsaAudioBackend::port_is_physical (PortEngine::PortHandle port) const +{ + if (!valid_port (port)) { + PBD::error << _("AlsaPort::port_is_physical (): invalid port.") << endmsg; + return false; + } + return static_cast<AlsaPort*>(port)->is_physical (); +} + +void +AlsaAudioBackend::get_physical_outputs (DataType type, std::vector<std::string>& port_names) +{ + for (size_t i = 0; i < _ports.size (); ++i) { + AlsaPort* port = _ports[i]; + if ((port->type () == type) && port->is_input () && port->is_physical ()) { + port_names.push_back (port->name ()); + } + } +} + +void +AlsaAudioBackend::get_physical_inputs (DataType type, std::vector<std::string>& port_names) +{ + for (size_t i = 0; i < _ports.size (); ++i) { + AlsaPort* port = _ports[i]; + if ((port->type () == type) && port->is_output () && port->is_physical ()) { + port_names.push_back (port->name ()); + } + } +} + +ChanCount +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]; + if (port->is_output () && port->is_physical ()) { + switch (port->type ()) { + case DataType::AUDIO: ++n_audio; break; + case DataType::MIDI: ++n_midi; break; + default: break; + } + } + } + ChanCount cc; + cc.set (DataType::AUDIO, n_audio); + cc.set (DataType::MIDI, n_midi); + return cc; +} + +ChanCount +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]; + if (port->is_input () && port->is_physical ()) { + switch (port->type ()) { + case DataType::AUDIO: ++n_audio; break; + case DataType::MIDI: ++n_midi; break; + default: break; + } + } + } + ChanCount cc; + cc.set (DataType::AUDIO, n_audio); + cc.set (DataType::MIDI, n_midi); + return cc; +} + +/* Getting access to the data buffer for a port */ + +void* +AlsaAudioBackend::get_buffer (PortEngine::PortHandle port, pframes_t nframes) +{ + assert (port); + assert (valid_port (port)); + return static_cast<AlsaPort*>(port)->get_buffer (nframes); +} + +/* Engine Process */ +void * +AlsaAudioBackend::main_process_thread () +{ + AudioEngine::thread_init_callback (this); + _running = true; + _processed_samples = 0; + + uint64_t clock1, clock2; + clock1 = g_get_monotonic_time(); + _pcmi->pcm_start (); + int no_proc_errors = 0; + + while (_running) { + long nr; + bool xrun = false; + if (!_freewheeling) { + nr = _pcmi->pcm_wait (); + + if (_pcmi->state () > 0) { + ++no_proc_errors; + xrun = true; + } + if (_pcmi->state () < 0 || no_proc_errors > 50) { + PBD::error << _("AlsaAudioBackend: I/O error. Audio Process Terminated.") << endmsg; + break; + } + while (nr >= (long)_samples_per_period) { + uint32_t i = 0; + clock1 = g_get_monotonic_time(); + no_proc_errors = 0; + + _pcmi->capt_init (_samples_per_period); + for (std::vector<AlsaPort*>::const_iterator it = _system_inputs.begin (); it != _system_inputs.end (); ++it, ++i) { + _pcmi->capt_chan (i, (float*)((*it)->get_buffer(_samples_per_period)), _samples_per_period); + } + _pcmi->capt_done (_samples_per_period); + + for (std::vector<AlsaPort*>::const_iterator it = _system_outputs.begin (); it != _system_outputs.end (); ++it) { + memset ((*it)->get_buffer (_samples_per_period), 0, _samples_per_period * sizeof (Sample)); + } + + if (engine.process_callback (_samples_per_period)) { + _pcmi->pcm_stop (); + return 0; + } + + /* write back audio */ + i = 0; + _pcmi->play_init (_samples_per_period); + for (std::vector<AlsaPort*>::const_iterator it = _system_outputs.begin (); it != _system_outputs.end (); ++it, ++i) { + _pcmi->play_chan (i, (const float*)(*it)->get_buffer (_samples_per_period), _samples_per_period); + } + for (; i < _pcmi->nplay (); ++i) { + _pcmi->clear_chan (i, _samples_per_period); + } + _pcmi->play_done (_samples_per_period); + 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; + } + + 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", + _pcmi->capt_xrun() * 1000.0, _pcmi->play_xrun() * 1000.0); +#endif + } + } else { + // Freewheelin' + for (std::vector<AlsaPort*>::const_iterator it = _system_inputs.begin (); it != _system_inputs.end (); ++it) { + memset ((*it)->get_buffer (_samples_per_period), 0, _samples_per_period * sizeof (Sample)); + } + if (engine.process_callback (_samples_per_period)) { + _pcmi->pcm_stop (); + return 0; + } + _dsp_load = 1.0; + Glib::usleep (100); // don't hog cpu + } + + if (!pthread_mutex_trylock (&_port_callback_mutex)) { + while (!_port_connection_queue.empty ()) { + PortConnectData *c = _port_connection_queue.back (); + manager.connect_callback (c->a, c->b, c->c); + _port_connection_queue.pop_back (); + delete c; + } + pthread_mutex_unlock (&_port_callback_mutex); + } + + } + _pcmi->pcm_stop (); + return 0; +} + + +/******************************************************************************/ + +static boost::shared_ptr<AlsaAudioBackend> _instance; + +static boost::shared_ptr<AudioBackend> backend_factory (AudioEngine& e); +static int instantiate (const std::string& arg1, const std::string& /* arg2 */); +static int deinstantiate (); +static bool already_configured (); + +static ARDOUR::AudioBackendInfo _descriptor = { + "Alsa", + instantiate, + deinstantiate, + backend_factory, + already_configured, +}; + +static boost::shared_ptr<AudioBackend> +backend_factory (AudioEngine& e) +{ + if (!_instance) { + _instance.reset (new AlsaAudioBackend (e, _descriptor)); + } + return _instance; +} + +static int +instantiate (const std::string& arg1, const std::string& /* arg2 */) +{ + s_instance_name = arg1; + return 0; +} + +static int +deinstantiate () +{ + _instance.reset (); + return 0; +} + +static bool +already_configured () +{ + return false; +} + +extern "C" ARDOURBACKEND_API ARDOUR::AudioBackendInfo* descriptor () +{ + return &_descriptor; +} + + +/******************************************************************************/ +AlsaPort::AlsaPort (AlsaAudioBackend &b, const std::string& name, PortFlags flags) + : _alsa_backend (b) + , _name (name) + , _flags (flags) +{ + _capture_latency_range.min = 0; + _capture_latency_range.max = 0; + _playback_latency_range.min = 0; + _playback_latency_range.max = 0; +} + +AlsaPort::~AlsaPort () { + disconnect_all (); +} + + +int AlsaPort::connect (AlsaPort *port) +{ + if (!port) { + PBD::error << _("AlsaPort::connect (): invalid (null) port") << endmsg; + return -1; + } + + if (type () != port->type ()) { + PBD::error << _("AlsaPort::connect (): wrong port-type") << endmsg; + return -1; + } + + if (is_output () && port->is_output ()) { + PBD::error << _("AlsaPort::connect (): cannot inter-connect output ports.") << endmsg; + return -1; + } + + if (is_input () && port->is_input ()) { + PBD::error << _("AlsaPort::connect (): cannot inter-connect input ports.") << endmsg; + return -1; + } + + if (this == port) { + PBD::error << _("AlsaPort::connect (): cannot self-connect ports.") << endmsg; + return -1; + } + + if (is_connected (port)) { +#if 0 // don't bother to warn about this for now. just ignore it + PBD::error << _("AlsaPort::connect (): ports are already connected:") + << " (" << name () << ") -> (" << port->name () << ")" + << endmsg; +#endif + return -1; + } + + _connect (port, true); + return 0; +} + + +void AlsaPort::_connect (AlsaPort *port, bool callback) +{ + _connections.push_back (port); + if (callback) { + port->_connect (this, false); + _alsa_backend.port_connect_callback (name(), port->name(), true); + } +} + +int AlsaPort::disconnect (AlsaPort *port) +{ + if (!port) { + PBD::error << _("AlsaPort::disconnect (): invalid (null) port") << endmsg; + return -1; + } + + if (!is_connected (port)) { + PBD::error << _("AlsaPort::disconnect (): ports are not connected:") + << " (" << name () << ") -> (" << port->name () << ")" + << endmsg; + return -1; + } + _disconnect (port, true); + return 0; +} + +void AlsaPort::_disconnect (AlsaPort *port, bool callback) +{ + std::vector<AlsaPort*>::iterator it = std::find (_connections.begin (), _connections.end (), port); + + assert (it != _connections.end ()); + + _connections.erase (it); + + if (callback) { + port->_disconnect (this, false); + _alsa_backend.port_connect_callback (name(), port->name(), false); + } +} + + +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 (); + } +} + +bool +AlsaPort::is_connected (const AlsaPort *port) const +{ + return std::find (_connections.begin (), _connections.end (), port) != _connections.end (); +} + +bool AlsaPort::is_physically_connected () const +{ + for (std::vector<AlsaPort*>::const_iterator it = _connections.begin (); it != _connections.end (); ++it) { + if ((*it)->is_physical ()) { + return true; + } + } + return false; +} + +/******************************************************************************/ + +AlsaAudioPort::AlsaAudioPort (AlsaAudioBackend &b, const std::string& name, PortFlags flags) + : AlsaPort (b, name, flags) +{ + memset (_buffer, 0, sizeof (_buffer)); + mlock(_buffer, sizeof (_buffer)); +} + +AlsaAudioPort::~AlsaAudioPort () { } + +void* AlsaAudioPort::get_buffer (pframes_t n_samples) +{ + if (is_input ()) { + std::vector<AlsaPort*>::const_iterator it = get_connections ().begin (); + if (it == get_connections ().end ()) { + memset (_buffer, 0, n_samples * sizeof (Sample)); + } else { + AlsaAudioPort const * source = static_cast<const AlsaAudioPort*>(*it); + assert (source && source->is_output ()); + memcpy (_buffer, source->const_buffer (), n_samples * sizeof (Sample)); + while (++it != get_connections ().end ()) { + source = static_cast<const AlsaAudioPort*>(*it); + assert (source && source->is_output ()); + Sample* dst = buffer (); + const Sample* src = source->const_buffer (); + for (uint32_t s = 0; s < n_samples; ++s, ++dst, ++src) { + *dst += *src; + } + } + } + } + return _buffer; +} + + +AlsaMidiPort::AlsaMidiPort (AlsaAudioBackend &b, const std::string& name, PortFlags flags) + : AlsaPort (b, name, flags) +{ + _buffer.clear (); +} + +AlsaMidiPort::~AlsaMidiPort () { } + +struct MidiEventSorter { + bool operator() (const boost::shared_ptr<AlsaMidiEvent>& a, const boost::shared_ptr<AlsaMidiEvent>& b) { + return *a < *b; + } +}; + +void* AlsaMidiPort::get_buffer (pframes_t /* nframes */) +{ + if (is_input ()) { + _buffer.clear (); + for (std::vector<AlsaPort*>::const_iterator i = get_connections ().begin (); + i != get_connections ().end (); + ++i) { + const AlsaMidiBuffer src = static_cast<const AlsaMidiPort*>(*i)->const_buffer (); + for (AlsaMidiBuffer::const_iterator it = src.begin (); it != src.end (); ++it) { + _buffer.push_back (boost::shared_ptr<AlsaMidiEvent>(new AlsaMidiEvent (**it))); + } + } + std::sort (_buffer.begin (), _buffer.end (), MidiEventSorter()); + } + return &_buffer; +} + +AlsaMidiEvent::AlsaMidiEvent (const pframes_t timestamp, const uint8_t* data, size_t size) + : _size (size) + , _timestamp (timestamp) + , _data (0) +{ + if (size > 0) { + _data = (uint8_t*) malloc (size); + memcpy (_data, data, size); + } +} + +AlsaMidiEvent::AlsaMidiEvent (const AlsaMidiEvent& other) + : _size (other.size ()) + , _timestamp (other.timestamp ()) + , _data (0) +{ + if (other.size () && other.const_data ()) { + _data = (uint8_t*) malloc (other.size ()); + memcpy (_data, other.const_data (), other.size ()); + } +}; + +AlsaMidiEvent::~AlsaMidiEvent () { + free (_data); +}; diff --git a/libs/backends/alsa/alsa_audiobackend.h b/libs/backends/alsa/alsa_audiobackend.h new file mode 100644 index 0000000000..4a5633ef23 --- /dev/null +++ b/libs/backends/alsa/alsa_audiobackend.h @@ -0,0 +1,365 @@ +/* + * Copyright (C) 2014 Robin Gareus <robin@gareus.org> + * Copyright (C) 2013 Paul Davis + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + */ + +#ifndef __libbackend_alsa_audiobackend_h__ +#define __libbackend_alsa_audiobackend_h__ + +#include <string> +#include <vector> +#include <map> +#include <set> + +#include <stdint.h> +#include <pthread.h> + +#include <boost/shared_ptr.hpp> + +#include "ardour/types.h" +#include "ardour/audio_backend.h" + +#include "zita-alsa-pcmi.h" + +namespace ARDOUR { + +class AlsaAudioBackend; + +class AlsaMidiEvent { + public: + AlsaMidiEvent (const pframes_t timestamp, const uint8_t* data, size_t size); + AlsaMidiEvent (const AlsaMidiEvent& other); + ~AlsaMidiEvent (); + size_t size () const { return _size; }; + pframes_t timestamp () const { return _timestamp; }; + const unsigned char* const_data () const { return _data; }; + unsigned char* data () { return _data; }; + bool operator< (const AlsaMidiEvent &other) const { return timestamp () < other.timestamp (); }; + private: + size_t _size; + pframes_t _timestamp; + uint8_t *_data; +}; + +typedef std::vector<boost::shared_ptr<AlsaMidiEvent> > AlsaMidiBuffer; + +class AlsaPort { + protected: + AlsaPort (AlsaAudioBackend &b, const std::string&, PortFlags); + public: + virtual ~AlsaPort (); + + const std::string& name () const { return _name; } + PortFlags flags () const { return _flags; } + + int set_name (const std::string &name) { _name = name; return 0; } + + virtual DataType type () const = 0; + + bool is_input () const { return flags () & IsInput; } + bool is_output () const { return flags () & IsOutput; } + bool is_physical () const { return flags () & IsPhysical; } + bool is_terminal () const { return flags () & IsTerminal; } + bool is_connected () const { return _connections.size () != 0; } + bool is_connected (const AlsaPort *port) const; + bool is_physically_connected () const; + + const std::vector<AlsaPort *>& get_connections () const { return _connections; } + + int connect (AlsaPort *port); + int disconnect (AlsaPort *port); + void disconnect_all (); + + virtual void* get_buffer (pframes_t nframes) = 0; + + const LatencyRange& latency_range (bool for_playback) const + { + return for_playback ? _playback_latency_range : _capture_latency_range; + } + + void set_latency_range (const LatencyRange &latency_range, bool for_playback) + { + if (for_playback) + { + _playback_latency_range = latency_range; + } + else + { + _capture_latency_range = latency_range; + } + } + + private: + AlsaAudioBackend &_alsa_backend; + std::string _name; + const PortFlags _flags; + LatencyRange _capture_latency_range; + LatencyRange _playback_latency_range; + std::vector<AlsaPort*> _connections; + + void _connect (AlsaPort* , bool); + void _disconnect (AlsaPort* , bool); + +}; // class AlsaPort + +class AlsaAudioPort : public AlsaPort { + public: + AlsaAudioPort (AlsaAudioBackend &b, const std::string&, PortFlags); + ~AlsaAudioPort (); + + DataType type () const { return DataType::AUDIO; }; + + Sample* buffer () { return _buffer; } + const Sample* const_buffer () const { return _buffer; } + void* get_buffer (pframes_t nframes); + + private: + Sample _buffer[8192]; +}; // class AlsaAudioPort + +class AlsaMidiPort : public AlsaPort { + public: + AlsaMidiPort (AlsaAudioBackend &b, const std::string&, PortFlags); + ~AlsaMidiPort (); + + DataType type () const { return DataType::MIDI; }; + + void* get_buffer (pframes_t nframes); + const AlsaMidiBuffer const_buffer () const { return _buffer; } + + private: + AlsaMidiBuffer _buffer; +}; // class AlsaMidiPort + +class AlsaAudioBackend : public AudioBackend { + friend class AlsaPort; + public: + AlsaAudioBackend (AudioEngine& e, AudioBackendInfo& info); + ~AlsaAudioBackend (); + + /* AUDIOBACKEND API */ + + std::string name () const; + bool is_realtime () const; + + std::vector<DeviceStatus> enumerate_devices () const; + std::vector<float> available_sample_rates (const std::string& device) const; + std::vector<uint32_t> available_buffer_sizes (const std::string& device) const; + uint32_t available_input_channel_count (const std::string& device) const; + uint32_t available_output_channel_count (const std::string& device) const; + + bool can_change_sample_rate_when_running () const; + bool can_change_buffer_size_when_running () const; + + int set_device_name (const std::string&); + int set_sample_rate (float); + int set_buffer_size (uint32_t); + int set_interleaved (bool yn); + int set_input_channels (uint32_t); + int set_output_channels (uint32_t); + int set_systemic_input_latency (uint32_t); + int set_systemic_output_latency (uint32_t); + + /* Retrieving parameters */ + std::string device_name () const; + float sample_rate () const; + uint32_t buffer_size () const; + bool interleaved () const; + uint32_t input_channels () const; + uint32_t output_channels () const; + uint32_t systemic_input_latency () const; + uint32_t systemic_output_latency () const; + + /* External control app */ + std::string control_app_name () const { return std::string (); } + void launch_control_app () {} + + /* MIDI */ + std::vector<std::string> enumerate_midi_options () const; + int set_midi_option (const std::string&); + std::string midi_option () const; + + /* State Control */ + protected: + int _start (bool for_latency_measurement); + public: + int stop (); + int freewheel (bool); + float dsp_load () const; + size_t raw_buffer_size (DataType t); + + /* Process time */ + pframes_t sample_time (); + pframes_t sample_time_at_cycle_start (); + pframes_t samples_since_cycle_start (); + + int create_process_thread (boost::function<void()> func); + int join_process_threads (); + bool in_process_thread (); + uint32_t process_thread_count (); + + void update_latencies (); + + /* PORTENGINE API */ + + void* private_handle () const; + const std::string& my_name () const; + bool available () const; + uint32_t port_name_size () const; + + int set_port_name (PortHandle, const std::string&); + std::string get_port_name (PortHandle) const; + PortHandle get_port_by_name (const std::string&) const; + + int get_ports (const std::string& port_name_pattern, DataType type, PortFlags flags, std::vector<std::string>&) const; + + DataType port_data_type (PortHandle) const; + + PortHandle register_port (const std::string& shortname, ARDOUR::DataType, ARDOUR::PortFlags); + void unregister_port (PortHandle); + + int connect (const std::string& src, const std::string& dst); + int disconnect (const std::string& src, const std::string& dst); + int connect (PortHandle, const std::string&); + int disconnect (PortHandle, const std::string&); + int disconnect_all (PortHandle); + + bool connected (PortHandle, bool process_callback_safe); + bool connected_to (PortHandle, const std::string&, bool process_callback_safe); + bool physically_connected (PortHandle, bool process_callback_safe); + int get_connections (PortHandle, std::vector<std::string>&, bool process_callback_safe); + + /* MIDI */ + int midi_event_get (pframes_t& timestamp, size_t& size, uint8_t** buf, void* port_buffer, uint32_t event_index); + int midi_event_put (void* port_buffer, pframes_t timestamp, const uint8_t* buffer, size_t size); + uint32_t get_midi_event_count (void* port_buffer); + void midi_clear (void* port_buffer); + + /* Monitoring */ + + bool can_monitor_input () const; + int request_input_monitoring (PortHandle, bool); + int ensure_input_monitoring (PortHandle, bool); + bool monitoring_input (PortHandle); + + /* Latency management */ + + void set_latency_range (PortHandle, bool for_playback, LatencyRange); + LatencyRange get_latency_range (PortHandle, bool for_playback); + + /* Discovering physical ports */ + + bool port_is_physical (PortHandle) const; + void get_physical_outputs (DataType type, std::vector<std::string>&); + void get_physical_inputs (DataType type, std::vector<std::string>&); + ChanCount n_physical_outputs () const; + ChanCount n_physical_inputs () const; + + /* Getting access to the data buffer for a port */ + + void* get_buffer (PortHandle, pframes_t); + + void* main_process_thread (); + + private: + std::string _instance_name; + Alsa_pcmi *_pcmi; + + bool _running; + bool _freewheeling; + + std::string _capture_device; + std::string _playback_device; + + float _samplerate; + size_t _samples_per_period; + size_t _periods_per_cycle; + float _dsp_load; + static size_t _max_buffer_size; + + uint32_t _n_inputs; + uint32_t _n_outputs; + + uint32_t _n_midi_inputs; + uint32_t _n_midi_outputs; + + uint32_t _systemic_input_latency; + uint32_t _systemic_output_latency; + + uint64_t _processed_samples; + + pthread_t _main_thread; + + /* process threads */ + static void* alsa_process_thread (void *); + std::vector<pthread_t> _threads; + + struct ThreadData { + AlsaAudioBackend* engine; + boost::function<void ()> f; + size_t stacksize; + + ThreadData (AlsaAudioBackend* e, boost::function<void ()> fp, size_t stacksz) + : engine (e) , f (fp) , stacksize (stacksz) {} + }; + + /* port engine */ + PortHandle add_port (const std::string& shortname, ARDOUR::DataType, ARDOUR::PortFlags); + int register_system_ports (); + void unregister_system_ports (); + + std::vector<AlsaPort *> _ports; + std::vector<AlsaPort*> _system_inputs; + std::vector<AlsaPort*> _system_outputs; + + + struct PortConnectData { + std::string a; + std::string b; + bool c; + + PortConnectData (const std::string& a, const std::string& b, bool c) + : a (a) , b (b) , c (c) {} + }; + + std::vector<PortConnectData *> _port_connection_queue; + pthread_mutex_t _port_callback_mutex; + + void port_connect_callback (const std::string& a, const std::string& b, bool conn) { + pthread_mutex_lock (&_port_callback_mutex); + _port_connection_queue.push_back(new PortConnectData(a, b, conn)); + pthread_mutex_unlock (&_port_callback_mutex); + } + + bool valid_port (PortHandle port) const { + return std::find (_ports.begin (), _ports.end (), (AlsaPort*)port) != _ports.end (); + } + + AlsaPort * find_port (const std::string& port_name) const { + for (std::vector<AlsaPort*>::const_iterator it = _ports.begin (); it != _ports.end (); ++it) { + if ((*it)->name () == port_name) { + return *it; + } + } + return NULL; + } + +}; // class AlsaAudioBackend + +} // namespace + +#endif /* __libbackend_alsa_audiobackend_h__ */ diff --git a/libs/backends/alsa/rt_thread.h b/libs/backends/alsa/rt_thread.h new file mode 100644 index 0000000000..68749ab7c3 --- /dev/null +++ b/libs/backends/alsa/rt_thread.h @@ -0,0 +1,56 @@ +/* + * Copyright (C) 2014 Robin Gareus <robin@gareus.org> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + */ + +#ifndef __libbackend_alsa_rthread_h__ +#define __libbackend_alsa_rthread_h__ + +#include <pthread.h> +#include <sched.h> + +static int +_realtime_pthread_create ( + int policy, int priority, + pthread_t *thread, + void *(*start_routine) (void *), + void *arg) +{ + int rv; + + pthread_attr_t attr; + struct sched_param parm; + const size_t stacksize = 100000; + + const int p_min = sched_get_priority_min (policy); + const int p_max = sched_get_priority_max (policy); + priority += p_max; + if (priority > p_max) priority = p_max; + if (priority < p_min) priority = p_min; + parm.sched_priority = priority; + + pthread_attr_init (&attr); + pthread_attr_setschedpolicy (&attr, policy); + pthread_attr_setschedparam (&attr, &parm); + pthread_attr_setscope (&attr, PTHREAD_SCOPE_SYSTEM); + pthread_attr_setinheritsched (&attr, PTHREAD_EXPLICIT_SCHED); + pthread_attr_setstacksize (&attr, stacksize); + rv = pthread_create (thread, &attr, start_routine, arg); + pthread_attr_destroy (&attr); + return rv; +} + +#endif diff --git a/libs/backends/alsa/wscript b/libs/backends/alsa/wscript new file mode 100644 index 0000000000..7e739405da --- /dev/null +++ b/libs/backends/alsa/wscript @@ -0,0 +1,39 @@ +#!/usr/bin/env python +from waflib.extras import autowaf as autowaf +import os +import sys +import re + +# Library version (UNIX style major, minor, micro) +# major increment <=> incompatible changes +# minor increment <=> compatible changes (additions) +# micro increment <=> no interface changes +ALSABACKEND_VERSION = '0.0.1' +I18N_PACKAGE = 'alsa-backend' + +# Mandatory variables +top = '.' +out = 'build' + +def options(opt): + autowaf.set_options(opt) + +def configure(conf): + autowaf.configure(conf) + +def build(bld): + obj = bld(features = 'cxx cxxshlib') + obj.source = [ + 'alsa_audiobackend.cc', + 'zita-alsa-pcmi.cc', + ] + obj.includes = ['.'] + obj.name = 'alsa_audiobackend' + obj.target = 'alsa_audiobackend' + obj.use = 'libardour libpbd' + obj.uselib = 'ALSA' + obj.vnum = ALSABACKEND_VERSION + obj.install_path = os.path.join(bld.env['LIBDIR'], 'backends') + obj.defines = ['PACKAGE="' + I18N_PACKAGE + '"', + 'ARDOURBACKEND_DLL_EXPORTS' + ] diff --git a/libs/backends/alsa/zita-alsa-pcmi.cc b/libs/backends/alsa/zita-alsa-pcmi.cc new file mode 100644 index 0000000000..8947e1a12e --- /dev/null +++ b/libs/backends/alsa/zita-alsa-pcmi.cc @@ -0,0 +1,1127 @@ +// ---------------------------------------------------------------------------- +// +// Copyright (C) 2006-2012 Fons Adriaensen <fons@linuxaudio.org> +// +// This program is free software; you can redistribute it and/or modify +// it under the terms of the GNU General Public License as published by +// the Free Software Foundation; either version 3 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, see <http://www.gnu.org/licenses/>. +// +// ---------------------------------------------------------------------------- + + +#include <endian.h> +#include <sys/time.h> +#include "zita-alsa-pcmi.h" + + +// Public members ---------------------------------------------------------------------- + + +int zita_alsa_pcmi_major_version (void) +{ + return ZITA_ALSA_PCMI_MAJOR_VERSION; +} + + +int zita_alsa_pcmi_minor_version (void) +{ + return ZITA_ALSA_PCMI_MINOR_VERSION; +} + + +Alsa_pcmi::Alsa_pcmi ( + const char *play_name, + const char *capt_name, + const char *ctrl_name, + unsigned int fsamp, + unsigned int fsize, + unsigned int nfrag, + unsigned int debug) + : _fsamp (fsamp) + , _fsize (fsize) + , _nfrag (nfrag) + , _debug (debug) + , _state (-1) + , _play_handle (0) + , _capt_handle (0) + , _ctrl_handle (0) + , _play_hwpar (0) + , _play_swpar (0) + , _capt_hwpar (0) + , _capt_swpar (0) + , _play_nchan (0) + , _capt_nchan (0) + , _play_xrun (0) + , _capt_xrun (0) + , _synced (false) + , _play_npfd (0) + , _capt_npfd (0) +{ + const char *p; + + p = getenv ("ZITA_ALSA_PCMI_DEBUG"); + if (p && *p) _debug = atoi (p); + initialise (play_name, capt_name, ctrl_name); +} + + +Alsa_pcmi::~Alsa_pcmi (void) +{ + if (_play_handle) snd_pcm_close (_play_handle); + if (_capt_handle) snd_pcm_close (_capt_handle); + if (_ctrl_handle) snd_ctl_close (_ctrl_handle); + + snd_pcm_sw_params_free (_capt_swpar); + snd_pcm_hw_params_free (_capt_hwpar); + snd_pcm_sw_params_free (_play_swpar); + snd_pcm_hw_params_free (_play_hwpar); +} + + +int Alsa_pcmi::pcm_start (void) +{ + unsigned int i, j, n; + int err; + + if (_play_handle) + { + n = snd_pcm_avail_update (_play_handle); + if (n != _fsize * _nfrag) + { + if (_debug & DEBUG_STAT) fprintf (stderr, "Alsa_pcmi: full buffer not available at start.\n"); + return -1; + } + for (i = 0; i < _nfrag; i++) + { + play_init (_fsize); + for (j = 0; j < _play_nchan; j++) clear_chan (j, _fsize); + play_done (_fsize); + } + if ((err = snd_pcm_start (_play_handle)) < 0) + { + if (_debug & DEBUG_STAT) fprintf (stderr, "Alsa_pcmi: pcm_start(play): %s.\n", snd_strerror (err)); + return -1; + } + } + if (_capt_handle && !_synced && ((err = snd_pcm_start (_capt_handle)) < 0)) + { + if (_debug & DEBUG_STAT) fprintf (stderr, "Alsa_pcmi: pcm_start(capt): %s.\n", snd_strerror (err)); + return -1; + } + + return 0; +} + + +int Alsa_pcmi::pcm_stop (void) +{ + int err; + + if (_play_handle && ((err = snd_pcm_drop (_play_handle)) < 0)) + { + if (_debug & DEBUG_STAT) fprintf (stderr, "Alsa_pcmi: pcm_drop(play): %s.\n", snd_strerror (err)); + return -1; + } + if (_capt_handle && !_synced && ((err = snd_pcm_drop (_capt_handle)) < 0)) + { + if (_debug & DEBUG_STAT) fprintf (stderr, "Alsa_pcmi: pcm_drop(capt): %s.\n", snd_strerror (err)); + return -1; + } + + return 0; +} + + +snd_pcm_sframes_t Alsa_pcmi::pcm_wait (void) +{ + bool need_capt; + bool need_play; + snd_pcm_sframes_t capt_av; + snd_pcm_sframes_t play_av; + unsigned short rev; + int i, r, n1, n2; + + _state = 0; + need_capt = _capt_handle ? true : false; + need_play = _play_handle ? true : false; + + while (need_play || need_capt) + { + n1 = 0; + if (need_play) + { + snd_pcm_poll_descriptors (_play_handle, _poll_fd, _play_npfd); + n1 += _play_npfd; + } + n2 = n1; + if (need_capt) + { + snd_pcm_poll_descriptors (_capt_handle, _poll_fd + n1, _capt_npfd); + n2 += _capt_npfd; + } + for (i = 0; i < n2; i++) _poll_fd [i].events |= POLLERR; + + r = poll (_poll_fd, n2, 1000); + if (r < 0) + { + if (errno == EINTR) return 0; + if (_debug & DEBUG_WAIT) fprintf (stderr, "Alsa_pcmi: poll(): %s\n.", strerror (errno)); + _state = -1; + return 0; + } + if (r == 0) + { + if (_debug & DEBUG_WAIT) fprintf (stderr, "Alsa_pcmi: poll timed out.\n"); + _state = -1; + return 0; + } + + if (need_play) + { + snd_pcm_poll_descriptors_revents (_play_handle, _poll_fd, n1, &rev); + if (rev & POLLERR) + { + if (_debug & DEBUG_WAIT) fprintf (stderr, "Alsa_pcmi: error on playback pollfd.\n"); + _state = 1; + recover (); + return 0; + } + if (rev & POLLOUT) need_play = false; + } + if (need_capt) + { + snd_pcm_poll_descriptors_revents (_capt_handle, _poll_fd + n1, n2 - n1, &rev); + if (rev & POLLERR) + { + if (_debug & DEBUG_WAIT) fprintf (stderr, "Alsa_pcmi: error on capture pollfd.\n"); + _state = 1; + recover (); + return 0; + } + if (rev & POLLIN) need_capt = false; + } + } + + play_av = 999999999; + if (_play_handle && (play_av = snd_pcm_avail_update (_play_handle)) < 0) + { + _state = -1; + recover (); + return 0; + } + capt_av = 999999999; + if (_capt_handle && (capt_av = snd_pcm_avail_update (_capt_handle)) < 0) + { + _state = -1; + recover (); + return 0; + } + + return (capt_av < play_av) ? capt_av : play_av; +} + + +int Alsa_pcmi::pcm_idle (int len) +{ + unsigned int i; + snd_pcm_uframes_t n, k; + + if (_capt_handle) + { + n = len; + while (n) + { + k = capt_init (n); + capt_done (k); + n -= k; + } + } + if (_play_handle) + { + n = len; + while (n) + { + k = play_init (n); + for (i = 0; i < _play_nchan; i++) clear_chan (i, k); + play_done (k); + n -= k; + } + } + return 0; +} + + +int Alsa_pcmi::play_init (snd_pcm_uframes_t len) +{ + unsigned int i; + const snd_pcm_channel_area_t *a; + int err; + + if ((err = snd_pcm_mmap_begin (_play_handle, &a, &_play_offs, &len)) < 0) + { + if (_debug & DEBUG_DATA) fprintf (stderr, "Alsa_pcmi: snd_pcm_mmap_begin(play): %s.\n", snd_strerror (err)); + return -1; + } + _play_step = (a->step) >> 3; + for (i = 0; i < _play_nchan; i++, a++) + { + _play_ptr [i] = (char *) a->addr + ((a->first + a->step * _play_offs) >> 3); + } + + return len; +} + + +int Alsa_pcmi::capt_init (snd_pcm_uframes_t len) +{ + unsigned int i; + const snd_pcm_channel_area_t *a; + int err; + + if ((err = snd_pcm_mmap_begin (_capt_handle, &a, &_capt_offs, &len)) < 0) + { + if (_debug & DEBUG_DATA) fprintf (stderr, "Alsa_pcmi: snd_pcm_mmap_begin(capt): %s.\n", snd_strerror (err)); + return -1; + } + _capt_step = (a->step) >> 3; + for (i = 0; i < _capt_nchan; i++, a++) + { + _capt_ptr [i] = (char *) a->addr + ((a->first + a->step * _capt_offs) >> 3); + } + + return len; +} + + +void Alsa_pcmi::clear_chan (int chan, int len) +{ + _play_ptr [chan] = (this->*Alsa_pcmi::_clear_func)(_play_ptr [chan], len); +} + + +void Alsa_pcmi::play_chan (int chan, const float *src, int len, int step) +{ + _play_ptr [chan] = (this->*Alsa_pcmi::_play_func)(src, _play_ptr [chan], len, step); +} + + +void Alsa_pcmi::capt_chan (int chan, float *dst, int len, int step) +{ + _capt_ptr [chan] = (this->*Alsa_pcmi::_capt_func)(_capt_ptr [chan], dst, len, step); +} + + +int Alsa_pcmi::play_done (int len) +{ + return snd_pcm_mmap_commit (_play_handle, _play_offs, len); +} + + +int Alsa_pcmi::capt_done (int len) +{ + return snd_pcm_mmap_commit (_capt_handle, _capt_offs, len); +} + + +void Alsa_pcmi::printinfo (void) +{ + fprintf (stdout, "playback :"); + if (_play_handle) + { + fprintf (stdout, "\n nchan : %d\n", _play_nchan); + fprintf (stdout, " fsamp : %d\n", _fsamp); + fprintf (stdout, " fsize : %ld\n", _fsize); + fprintf (stdout, " nfrag : %d\n", _nfrag); + fprintf (stdout, " format : %s\n", snd_pcm_format_name (_play_format)); + } + else fprintf (stdout, " not enabled\n"); + fprintf (stdout, "capture :"); + if (_capt_handle) + { + fprintf (stdout, "\n nchan : %d\n", _capt_nchan); + fprintf (stdout, " fsamp : %d\n", _fsamp); + fprintf (stdout, " fsize : %ld\n", _fsize); + fprintf (stdout, " nfrag : %d\n", _nfrag); + fprintf (stdout, " format : %s\n", snd_pcm_format_name (_capt_format)); + if (_play_handle) fprintf (stdout, "%s\n", _synced ? "synced" : "not synced"); + } + else fprintf (stdout, " not enabled\n"); +} + + +// Private members --------------------------------------------------------------------- + + +void Alsa_pcmi::initialise (const char *play_name, const char *capt_name, const char *ctrl_name) +{ + unsigned int fsamp; + snd_pcm_uframes_t fsize; + unsigned int nfrag; + int err; + int dir; + snd_ctl_card_info_t *card; + + if (play_name) + { + if (snd_pcm_open (&_play_handle, play_name, SND_PCM_STREAM_PLAYBACK, 0) < 0) + { + _play_handle = 0; + if (_debug & DEBUG_INIT) fprintf (stderr, "Alsa_pcmi: Cannot open PCM device %s for playback.\n", + play_name); + } + } + + if (capt_name) + { + if (snd_pcm_open (&_capt_handle, capt_name, SND_PCM_STREAM_CAPTURE, 0) < 0) + { + _capt_handle = 0; + if (_debug & DEBUG_INIT) fprintf (stderr, "Alsa_pcmi: Cannot open PCM device %s for capture.\n", + capt_name); + } + } + + if (! _play_handle && ! _capt_handle) return; + + if (ctrl_name) + { + snd_ctl_card_info_alloca (&card); + + if ((err = snd_ctl_open (&_ctrl_handle, ctrl_name, 0)) < 0) + { + if (_debug & DEBUG_INIT) fprintf (stderr, "Alse_driver: ctl_open(): %s\n", + snd_strerror (err)); + return; + } + if ((err = snd_ctl_card_info (_ctrl_handle, card)) < 0) + { + if (_debug & DEBUG_INIT) fprintf (stderr, "Alsa_pcmi: ctl_card_info(): %s\n", + snd_strerror (err)); + return; + } + } + + if (_play_handle) + { + if (snd_pcm_hw_params_malloc (&_play_hwpar) < 0) + { + if (_debug & DEBUG_INIT) fprintf (stderr, "Alsa_pcmi: can't allocate playback hw params\n"); + return; + } + if (snd_pcm_sw_params_malloc (&_play_swpar) < 0) + { + if (_debug & DEBUG_INIT) fprintf (stderr, "Alsa_pcmi: can't allocate playback sw params\n"); + return; + } + if (set_hwpar (_play_handle, _play_hwpar, "playback", &_play_nchan) < 0) return; + if (set_swpar (_play_handle, _play_swpar, "playback") < 0) return; + } + + if (_capt_handle) + { + if (snd_pcm_hw_params_malloc (&_capt_hwpar) < 0) + { + if (_debug & DEBUG_INIT) fprintf (stderr, "Alsa_pcmi: can't allocate capture hw params\n"); + return; + } + if (snd_pcm_sw_params_malloc (&_capt_swpar) < 0) + { + if (_debug & DEBUG_INIT) fprintf (stderr, "Alsa_pcmi: can't allocate capture sw params\n"); + return; + } + if (set_hwpar (_capt_handle, _capt_hwpar, "capture", &_capt_nchan) < 0) return; + if (set_swpar (_capt_handle, _capt_swpar, "capture") < 0) return; + } + + if (_play_handle) + { + if (snd_pcm_hw_params_get_rate (_play_hwpar, &fsamp, &dir) || (fsamp != _fsamp) || dir) + { + if (_debug & DEBUG_INIT) fprintf (stderr, "Alsa_pcmi: can't get requested sample rate for playback.\n"); + return; + } + if (snd_pcm_hw_params_get_period_size (_play_hwpar, &fsize, &dir) || (fsize != _fsize) || dir) + { + if (_debug & DEBUG_INIT) fprintf (stderr, "Alsa_pcmi: can't get requested period size for playback.\n"); + return; + } + if (snd_pcm_hw_params_get_periods (_play_hwpar, &nfrag, &dir) || (nfrag != _nfrag) || dir) + { + if (_debug & DEBUG_INIT) fprintf (stderr, "Alsa_pcmi: can't get requested number of periods for playback.\n"); + return; + } + + snd_pcm_hw_params_get_format (_play_hwpar, &_play_format); + snd_pcm_hw_params_get_access (_play_hwpar, &_play_access); + +#if __BYTE_ORDER == __LITTLE_ENDIAN + switch (_play_format) + { + case SND_PCM_FORMAT_FLOAT_LE: + _clear_func = &Alsa_pcmi::clear_32; + _play_func = &Alsa_pcmi::play_float; + break; + + case SND_PCM_FORMAT_S32_LE: + _clear_func = &Alsa_pcmi::clear_32; + _play_func = &Alsa_pcmi::play_32; + break; + + case SND_PCM_FORMAT_S32_BE: + _clear_func = &Alsa_pcmi::clear_32; + _play_func = &Alsa_pcmi::play_32swap; + break; + + case SND_PCM_FORMAT_S24_3LE: + _clear_func = &Alsa_pcmi::clear_24; + _play_func = &Alsa_pcmi::play_24; + break; + + case SND_PCM_FORMAT_S24_3BE: + _clear_func = &Alsa_pcmi::clear_24; + _play_func = &Alsa_pcmi::play_24swap; + break; + + case SND_PCM_FORMAT_S16_LE: + _clear_func = &Alsa_pcmi::clear_16; + _play_func = &Alsa_pcmi::play_16; + break; + + case SND_PCM_FORMAT_S16_BE: + _clear_func = &Alsa_pcmi::clear_16; + _play_func = &Alsa_pcmi::play_16swap; + break; + + default: + if (_debug & DEBUG_INIT) fprintf (stderr, "Alsa_pcmi: can't handle playback sample format.\n"); + return; + } +#elif __BYTE_ORDER == __BIG_ENDIAN + switch (_play_format) + { + case SND_PCM_FORMAT_S32_LE: + _clear_func = &Alsa_pcmi::clear_32; + _play_func = &Alsa_pcmi::play_32swap; + break; + + case SND_PCM_FORMAT_S32_BE: + _clear_func = &Alsa_pcmi::clear_32; + _play_func = &Alsa_pcmi::play_32; + break; + + case SND_PCM_FORMAT_S24_3LE: + _clear_func = &Alsa_pcmi::clear_24; + _play_func = &Alsa_pcmi::play_24swap; + break; + + case SND_PCM_FORMAT_S24_3BE: + _clear_func = &Alsa_pcmi::clear_24; + _play_func = &Alsa_pcmi::play_24; + break; + + case SND_PCM_FORMAT_S16_LE: + _clear_func = &Alsa_pcmi::clear_16; + _play_func = &Alsa_pcmi::play_16swap; + break; + + case SND_PCM_FORMAT_S16_BE: + _clear_func = &Alsa_pcmi::clear_16; + _play_func = &Alsa_pcmi::play_16; + break; + + default: + if (_debug & DEBUG_INIT) fprintf (stderr, "Alsa_pcmi: can't handle playback sample format.\n"); + return; + } +#else +#error "System byte order is undefined or not supported" +#endif + + _play_npfd = snd_pcm_poll_descriptors_count (_play_handle); + } + + if (_capt_handle) + { + if (snd_pcm_hw_params_get_rate (_capt_hwpar, &fsamp, &dir) || (fsamp != _fsamp) || dir) + { + if (_debug & DEBUG_INIT) fprintf (stderr, "Alsa_pcmi: can't get requested sample rate for capture.\n"); + return; + } + if (snd_pcm_hw_params_get_period_size (_capt_hwpar, &fsize, &dir) || (fsize != _fsize) || dir) + { + if (_debug & DEBUG_INIT) fprintf (stderr, "Alsa_pcmi: can't get requested period size for capture.\n"); + return; + } + if (snd_pcm_hw_params_get_periods (_capt_hwpar, &nfrag, &dir) || (nfrag != _nfrag) || dir) + { + if (_debug & DEBUG_INIT) fprintf (stderr, "Alsa_pcmi: can't get requested number of periods for capture.\n"); + return; + } + + if (_play_handle) _synced = ! snd_pcm_link (_play_handle, _capt_handle); + + snd_pcm_hw_params_get_format (_capt_hwpar, &_capt_format); + snd_pcm_hw_params_get_access (_capt_hwpar, &_capt_access); + +#if __BYTE_ORDER == __LITTLE_ENDIAN + switch (_capt_format) + { + case SND_PCM_FORMAT_FLOAT_LE: + _capt_func = &Alsa_pcmi::capt_float; + break; + + case SND_PCM_FORMAT_S32_LE: + _capt_func = &Alsa_pcmi::capt_32; + break; + + case SND_PCM_FORMAT_S32_BE: + _capt_func = &Alsa_pcmi::capt_32swap; + break; + + case SND_PCM_FORMAT_S24_3LE: + _capt_func = &Alsa_pcmi::capt_24; + break; + + case SND_PCM_FORMAT_S24_3BE: + _capt_func = &Alsa_pcmi::capt_24swap; + break; + + case SND_PCM_FORMAT_S16_LE: + _capt_func = &Alsa_pcmi::capt_16; + break; + + case SND_PCM_FORMAT_S16_BE: + _capt_func = &Alsa_pcmi::capt_16swap; + break; + + default: + if (_debug & DEBUG_INIT) fprintf (stderr, "Alsa_pcmi: can't handle capture sample format.\n"); + return; + } +#elif __BYTE_ORDER == __BIG_ENDIAN + switch (_capt_format) + { + case SND_PCM_FORMAT_S32_LE: + _capt_func = &Alsa_pcmi::capt_32swap; + break; + + case SND_PCM_FORMAT_S32_BE: + _capt_func = &Alsa_pcmi::capt_32; + break; + + case SND_PCM_FORMAT_S24_3LE: + _capt_func = &Alsa_pcmi::capt_24swap; + break; + + case SND_PCM_FORMAT_S24_3BE: + _capt_func = &Alsa_pcmi::capt_24; + break; + + case SND_PCM_FORMAT_S16_LE: + _capt_func = &Alsa_pcmi::capt_16swap; + break; + + case SND_PCM_FORMAT_S16_BE: + _capt_func = &Alsa_pcmi::capt_16; + break; + + default: + if (_debug & DEBUG_INIT) fprintf (stderr, "Alsa_pcmi: can't handle capture sample format.\n"); + return; + } +#else +#error "System byte order is undefined or not supported" +#endif + + _capt_npfd = snd_pcm_poll_descriptors_count (_capt_handle); + } + + if (_play_npfd + _capt_npfd > MAXPFD) + { + if (_debug & DEBUG_INIT) fprintf (stderr, "Alsa_pcmi: interface requires more than %d pollfd\n", MAXPFD); + return; + } + + _state = 0; +} + + +int Alsa_pcmi::set_hwpar (snd_pcm_t *handle, snd_pcm_hw_params_t *hwpar, const char *sname, unsigned int *nchan) +{ + bool err; + + if (snd_pcm_hw_params_any (handle, hwpar) < 0) + { + if (_debug & DEBUG_INIT) fprintf (stderr, "Alsa_pcmi: no %s hw configurations available.\n", + sname); + return -1; + } + if (snd_pcm_hw_params_set_periods_integer (handle, hwpar) < 0) + { + if (_debug & DEBUG_INIT) fprintf (stderr, "Alsa_pcmi: can't set %s period size to integral value.\n", + sname); + return -1; + } + if ( (snd_pcm_hw_params_set_access (handle, hwpar, SND_PCM_ACCESS_MMAP_NONINTERLEAVED) < 0) + && (snd_pcm_hw_params_set_access (handle, hwpar, SND_PCM_ACCESS_MMAP_INTERLEAVED) < 0) + && (snd_pcm_hw_params_set_access (handle, hwpar, SND_PCM_ACCESS_MMAP_COMPLEX) < 0)) + { + if (_debug & DEBUG_INIT) fprintf (stderr, "Alsa_pcmi: the %s interface doesn't support mmap-based access.\n", + sname); + return -1; + } + if (_debug & FORCE_16B) + { + err = (snd_pcm_hw_params_set_format (handle, hwpar, SND_PCM_FORMAT_S16_LE) < 0) + && (snd_pcm_hw_params_set_format (handle, hwpar, SND_PCM_FORMAT_S16_BE) < 0); + } + else + { + err = (snd_pcm_hw_params_set_format (handle, hwpar, SND_PCM_FORMAT_FLOAT_LE) < 0) + && (snd_pcm_hw_params_set_format (handle, hwpar, SND_PCM_FORMAT_S32_LE) < 0) + && (snd_pcm_hw_params_set_format (handle, hwpar, SND_PCM_FORMAT_S32_BE) < 0) + && (snd_pcm_hw_params_set_format (handle, hwpar, SND_PCM_FORMAT_S24_3LE) < 0) + && (snd_pcm_hw_params_set_format (handle, hwpar, SND_PCM_FORMAT_S24_3BE) < 0) + && (snd_pcm_hw_params_set_format (handle, hwpar, SND_PCM_FORMAT_S16_LE) < 0) + && (snd_pcm_hw_params_set_format (handle, hwpar, SND_PCM_FORMAT_S16_BE) < 0); + } + if (err) + { + if (_debug & DEBUG_INIT) fprintf (stderr, "Alsa_pcmi: no supported sample format on %s interface.\n.", + sname); + return -1; + } + if (snd_pcm_hw_params_set_rate (handle, hwpar, _fsamp, 0) < 0) + { + if (_debug & DEBUG_INIT) fprintf (stderr, "Alsa_pcmi: can't set %s sample rate to %u.\n", + sname, _fsamp); + return -1; + } + snd_pcm_hw_params_get_channels_max (hwpar, nchan); + if (*nchan > 1024) + { + if (_debug & DEBUG_INIT) fprintf (stderr, "Alsa_pcmi: detected more than 1024 %s channnels, reset to 2.\n", + sname); + *nchan = 2; + } + if (_debug & FORCE_2CH) + { + *nchan = 2; + } + if (*nchan > MAXCHAN) + { + if (_debug & DEBUG_INIT) fprintf (stderr, "Alsa_pcmi: number of %s channels reduced to %d.\n", + sname, MAXCHAN); + *nchan = MAXCHAN; + } + + if (snd_pcm_hw_params_set_channels (handle, hwpar, *nchan) < 0) + { + if (_debug & DEBUG_INIT) fprintf (stderr, "Alsa_pcmi: can't set %s channel count to %u.\n", + sname, *nchan); + return -1; + } + if (snd_pcm_hw_params_set_period_size (handle, hwpar, _fsize, 0) < 0) + { + if (_debug & DEBUG_INIT) fprintf (stderr, "Alsa_pcmi: can't set %s period size to %lu.\n", + sname, _fsize); + return -1; + } + if (snd_pcm_hw_params_set_periods (handle, hwpar, _nfrag, 0) < 0) + { + if (_debug & DEBUG_INIT) fprintf (stderr, "Alsa_pcmi: can't set %s periods to %u.\n", + sname, _nfrag); + return -1; + } + if (snd_pcm_hw_params_set_buffer_size (handle, hwpar, _fsize * _nfrag) < 0) + { + if (_debug & DEBUG_INIT) fprintf (stderr, "Alsa_pcmi: can't set %s buffer length to %lu.\n", + sname, _fsize * _nfrag); + return -1; + } + if (snd_pcm_hw_params (handle, hwpar) < 0) + { + if (_debug & DEBUG_INIT) fprintf (stderr, "Alsa_pcmi: can't set %s hardware parameters.\n", + sname); + return -1; + } + + return 0; +} + + +int Alsa_pcmi::set_swpar (snd_pcm_t *handle, snd_pcm_sw_params_t *swpar, const char *sname) +{ + int err; + + snd_pcm_sw_params_current (handle, swpar); + + if ((err = snd_pcm_sw_params_set_tstamp_mode (handle, swpar, SND_PCM_TSTAMP_MMAP)) < 0) + { + if (_debug & DEBUG_INIT) fprintf (stderr, "Alsa_pcmi: can't set %s timestamp mode to %u.\n", + sname, SND_PCM_TSTAMP_MMAP); + return -1; + } + if ((err = snd_pcm_sw_params_set_avail_min (handle, swpar, _fsize)) < 0) + { + if (_debug & DEBUG_INIT) fprintf (stderr, "Alsa_pcmi: can't set %s avail_min to %lu.\n", + sname, _fsize); + return -1; + } + if ((err = snd_pcm_sw_params (handle, swpar)) < 0) + { + if (_debug & DEBUG_INIT) fprintf (stderr, "Alsa_pcmi: can't set %s software parameters.\n", + sname); + return -1; + } + + return 0; +} + + +int Alsa_pcmi::recover (void) +{ + int err; + snd_pcm_status_t *stat; + + snd_pcm_status_alloca (&stat); + + if (_play_handle) + { + if ((err = snd_pcm_status (_play_handle, stat)) < 0) + { + if (_debug & DEBUG_STAT) fprintf (stderr, "Alsa_pcmi: pcm_status(play): %s\n", + snd_strerror (err)); + } + _play_xrun = xruncheck (stat); + } + if (_capt_handle) + { + if ((err = snd_pcm_status (_capt_handle, stat)) < 0) + { + if (_debug & DEBUG_STAT) fprintf (stderr, "Alsa_pcmi: pcm_status(capt): %s\n", + snd_strerror (err)); + } + _capt_xrun = xruncheck (stat); + } + + if (pcm_stop ()) return -1; + if (_play_handle && ((err = snd_pcm_prepare (_play_handle)) < 0)) + { + if (_debug & DEBUG_STAT) fprintf (stderr, "Alsa_pcmi: pcm_prepare(play): %s\n", + snd_strerror (err)); + return -1; + } + if (_capt_handle && !_synced && ((err = snd_pcm_prepare (_capt_handle)) < 0)) + { + if (_debug & DEBUG_INIT) fprintf (stderr, "Alsa_pcmi: pcm_prepare(capt): %s\n", + snd_strerror (err)); + return -1; + } + if (pcm_start ()) return -1; + + return 0; +} + + +float Alsa_pcmi::xruncheck (snd_pcm_status_t *stat) +{ + struct timeval tupd, trig; + int ds, du; + + if (snd_pcm_status_get_state (stat) == SND_PCM_STATE_XRUN) + { + snd_pcm_status_get_tstamp (stat, &tupd); + snd_pcm_status_get_trigger_tstamp (stat, &trig); + ds = tupd.tv_sec - trig.tv_sec; + du = tupd.tv_usec - trig.tv_usec; + if (du < 0) + { + du += 1000000; + ds -= 1; + } + return ds + 1e-6f * du; + } + return 0.0f; +} + + +char *Alsa_pcmi::clear_16 (char *dst, int nfrm) +{ + while (nfrm--) + { + *((short int *) dst) = 0; + dst += _play_step; + } + return dst; +} + +char *Alsa_pcmi::clear_24 (char *dst, int nfrm) +{ + while (nfrm--) + { + dst [0] = 0; + dst [1] = 0; + dst [2] = 0; + dst += _play_step; + } + return dst; +} + +char *Alsa_pcmi::clear_32 (char *dst, int nfrm) +{ + while (nfrm--) + { + *((int *) dst) = 0; + dst += _play_step; + } + return dst; +} + + +char *Alsa_pcmi::play_16 (const float *src, char *dst, int nfrm, int step) +{ + float s; + short int d; + + while (nfrm--) + { + s = *src; + if (s > 1) d = 0x7fff; + else if (s < -1) d = 0x8001; + else d = (short int)((float) 0x7fff * s); + *((short int *) dst) = d; + dst += _play_step; + src += step; + } + return dst; +} + +char *Alsa_pcmi::play_16swap (const float *src, char *dst, int nfrm, int step) +{ + float s; + short int d; + + while (nfrm--) + { + s = *src; + if (s > 1) d = 0x7fff; + else if (s < -1) d = 0x8001; + else d = (short int)((float) 0x7fff * s); + dst [0] = d >> 8; + dst [1] = d; + dst += _play_step; + src += step; + } + return dst; +} + +char *Alsa_pcmi::play_24 (const float *src, char *dst, int nfrm, int step) +{ + float s; + int d; + + while (nfrm--) + { + s = *src; + if (s > 1) d = 0x007fffff; + else if (s < -1) d = 0x00800001; + else d = (int)((float) 0x007fffff * s); + dst [0] = d; + dst [1] = d >> 8; + dst [2] = d >> 16; + dst += _play_step; + src += step; + } + return dst; +} + +char *Alsa_pcmi::play_24swap (const float *src, char *dst, int nfrm, int step) +{ + float s; + int d; + + while (nfrm--) + { + s = *src; + if (s > 1) d = 0x007fffff; + else if (s < -1) d = 0x00800001; + else d = (int)((float) 0x007fffff * s); + dst [0] = d >> 16; + dst [1] = d >> 8; + dst [2] = d; + dst += _play_step; + src += step; + } + return dst; +} + +char *Alsa_pcmi::play_32 (const float *src, char *dst, int nfrm, int step) +{ + float s; + int d; + + while (nfrm--) + { + s = *src; + if (s > 1) d = 0x007fffff; + else if (s < -1) d = 0x00800001; + else d = (int)((float) 0x007fffff * s); + *((int *) dst) = d << 8; + dst += _play_step; + src += step; + } + return dst; +} + +char *Alsa_pcmi::play_32swap (const float *src, char *dst, int nfrm, int step) +{ + float s; + int d; + + while (nfrm--) + { + s = *src; + if (s > 1) d = 0x007fffff; + else if (s < -1) d = 0x00800001; + else d = (int)((float) 0x007fffff * s); + dst [0] = d >> 16; + dst [1] = d >> 8; + dst [2] = d; + dst [3] = 0; + dst += _play_step; + src += step; + } + return dst; +} + +char *Alsa_pcmi::play_float (const float *src, char *dst, int nfrm, int step) +{ + while (nfrm--) + { + *((float *) dst) = *src; + dst += _play_step; + src += step; + } + return dst; +} + + +const char *Alsa_pcmi::capt_16 (const char *src, float *dst, int nfrm, int step) +{ + while (nfrm--) + { + const short int s = *((short int const *) src); + const float d = (float) s / (float) 0x7fff; + *dst = d; + dst += step; + src += _capt_step; + } + return src; +} + +const char *Alsa_pcmi::capt_16swap (const char *src, float *dst, int nfrm, int step) +{ + float d; + short int s; + + while (nfrm--) + { + s = (src [0] & 0xFF) << 8; + s += (src [1] & 0xFF); + d = (float) s / (float) 0x7fff; + *dst = d; + dst += step; + src += _capt_step; + } + return src; +} + +const char *Alsa_pcmi::capt_24 (const char *src, float *dst, int nfrm, int step) +{ + float d; + int s; + + while (nfrm--) + { + s = (src [0] & 0xFF); + s += (src [1] & 0xFF) << 8; + s += (src [2] & 0xFF) << 16; + if (s & 0x00800000) s-= 0x01000000; + d = (float) s / (float) 0x007fffff; + *dst = d; + dst += step; + src += _capt_step; + } + return src; +} + +const char *Alsa_pcmi::capt_24swap (const char *src, float *dst, int nfrm, int step) +{ + float d; + int s; + + while (nfrm--) + { + s = (src [0] & 0xFF) << 16; + s += (src [1] & 0xFF) << 8; + s += (src [2] & 0xFF); + if (s & 0x00800000) s-= 0x01000000; + d = (float) s / (float) 0x007fffff; + *dst = d; + dst += step; + src += _capt_step; + } + return src; +} + +const char *Alsa_pcmi::capt_32 (const char *src, float *dst, int nfrm, int step) +{ + while (nfrm--) + { + const int s = *((int const *) src); + const float d = (float) s / (float) 0x7fffff00; + *dst = d; + dst += step; + src += _capt_step; + } + return src; +} + +const char *Alsa_pcmi::capt_32swap (const char *src, float *dst, int nfrm, int step) +{ + float d; + int s; + + while (nfrm--) + { + s = (src [0] & 0xFF) << 24; + s += (src [1] & 0xFF) << 16; + s += (src [2] & 0xFF) << 8; + d = (float) s / (float) 0x7fffff00; + *dst = d; + dst += step; + src += _capt_step; + } + return src; +} + +const char *Alsa_pcmi::capt_float (const char *src, float *dst, int nfrm, int step) +{ + while (nfrm--) + { + *dst = *((float const *) src); + dst += step; + src += _capt_step; + } + return src; +} diff --git a/libs/backends/alsa/zita-alsa-pcmi.h b/libs/backends/alsa/zita-alsa-pcmi.h new file mode 100644 index 0000000000..5f7377db5c --- /dev/null +++ b/libs/backends/alsa/zita-alsa-pcmi.h @@ -0,0 +1,188 @@ +// ---------------------------------------------------------------------------- +// +// Copyright (C) 2006-2012 Fons Adriaensen <fons@linuxaudio.org> +// +// This program is free software; you can redistribute it and/or modify +// it under the terms of the GNU General Public License as published by +// the Free Software Foundation; either version 3 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, see <http://www.gnu.org/licenses/>. +// +// ---------------------------------------------------------------------------- + + +#ifndef _ZITA_ALSA_PCMI_H_ +#define _ZITA_ALSA_PCMI_H_ + + +#define ALSA_PCM_NEW_HW_PARAMS_API +#define ALSA_PCM_NEW_SW_PARAMS_API +#include <alsa/asoundlib.h> + + +#define ZITA_ALSA_PCMI_MAJOR_VERSION 0 +#define ZITA_ALSA_PCMI_MINOR_VERSION 2 + +#include <stdint.h> + +extern int zita_alsa_pcmi_major_version (void); +extern int zita_alsa_pcmi_minor_version (void); + + +class Alsa_pcmi +{ +public: + + Alsa_pcmi ( + const char *play_name, + const char *capt_name, + const char *ctrl_name, + unsigned int rate, + unsigned int frsize, + unsigned int nfrags, + unsigned int debug = 0); + + ~Alsa_pcmi (void); + + enum + { + DEBUG_INIT = 1, + DEBUG_STAT = 2, + DEBUG_WAIT = 4, + DEBUG_DATA = 8, + DEBUG_ALL = 15, + FORCE_16B = 256, + FORCE_2CH = 512 + }; + + void printinfo (void); + + int pcm_start (void); + int pcm_stop (void); + snd_pcm_sframes_t pcm_wait (void); + int pcm_idle (int len); + + int play_init (snd_pcm_uframes_t len); + void clear_chan (int chan, int len); + void play_chan (int chan, const float *src, int len, int step = 1); + int play_done (int len); + + int capt_init (snd_pcm_uframes_t len); + void capt_chan (int chan, float *dst, int len, int step = 1); + int capt_done (int len); + + int play_avail (void) + { + return snd_pcm_avail (_play_handle); + } + + int capt_avail (void) + { + return snd_pcm_avail (_capt_handle); + } + + int play_delay (void) + { + long k; + snd_pcm_delay (_play_handle, &k); + return k; + } + + int capt_delay (void) + { + long k; + snd_pcm_delay (_capt_handle, &k); + return k; + } + + float play_xrun (void) const { return _play_xrun; } + float capt_xrun (void) const { return _capt_xrun; } + + int state (void) const { return _state; } + size_t fsize (void) const { return _fsize; } + uint32_t fsamp (void) const { return _fsamp; } + uint32_t nfrag (void) const { return _nfrag; } + uint32_t nplay (void) const { return _play_nchan; } + uint32_t ncapt (void) const { return _capt_nchan; } + snd_pcm_t *play_handle (void) const { return _play_handle; } + snd_pcm_t *capt_handle (void) const { return _capt_handle; } + + +private: + + typedef char *(Alsa_pcmi::*clear_function)(char *, int); + typedef char *(Alsa_pcmi::*play_function)(const float *, char *, int, int); + typedef const char *(Alsa_pcmi::*capt_function) (const char *, float *, int, int); + + enum { MAXPFD = 16, MAXCHAN = 64 }; + + void initialise (const char *play_name, const char *capt_name, const char *ctrl_name); + int set_hwpar (snd_pcm_t *handle, snd_pcm_hw_params_t *hwpar, const char *sname, unsigned int *nchan); + int set_swpar (snd_pcm_t *handle, snd_pcm_sw_params_t *swpar, const char *sname); + int recover (void); + float xruncheck (snd_pcm_status_t *stat); + + char *clear_32 (char *dst, int nfrm); + char *clear_24 (char *dst, int nfrm); + char *clear_16 (char *dst, int nfrm); + + char *play_float (const float *src, char *dst, int nfrm, int step); + char *play_32 (const float *src, char *dst, int nfrm, int step); + char *play_24 (const float *src, char *dst, int nfrm, int step); + char *play_16 (const float *src, char *dst, int nfrm, int step); + char *play_32swap (const float *src, char *dst, int nfrm, int step); + char *play_24swap (const float *src, char *dst, int nfrm, int step); + char *play_16swap (const float *src, char *dst, int nfrm, int step); + + const char *capt_float (const char *src, float *dst, int nfrm, int step); + const char *capt_32 (const char *src, float *dst, int nfrm, int step); + const char *capt_24 (const char *src, float *dst, int nfrm, int step); + const char *capt_16 (const char *src, float *dst, int nfrm, int step); + const char *capt_32swap (const char *src, float *dst, int nfrm, int step); + const char *capt_24swap (const char *src, float *dst, int nfrm, int step); + const char *capt_16swap (const char *src, float *dst, int nfrm, int step); + + unsigned int _fsamp; + snd_pcm_uframes_t _fsize; + unsigned int _nfrag; + unsigned int _debug; + int _state; + snd_pcm_t *_play_handle; + snd_pcm_t *_capt_handle; + snd_ctl_t *_ctrl_handle; + snd_pcm_hw_params_t *_play_hwpar; + snd_pcm_sw_params_t *_play_swpar; + snd_pcm_hw_params_t *_capt_hwpar; + snd_pcm_sw_params_t *_capt_swpar; + snd_pcm_format_t _play_format; + snd_pcm_format_t _capt_format; + snd_pcm_access_t _play_access; + snd_pcm_access_t _capt_access; + unsigned int _play_nchan; + unsigned int _capt_nchan; + float _play_xrun; + float _capt_xrun; + bool _synced; + int _play_npfd; + int _capt_npfd; + struct pollfd _poll_fd [MAXPFD]; + snd_pcm_uframes_t _capt_offs; + snd_pcm_uframes_t _play_offs; + int _play_step; + int _capt_step; + char *_play_ptr [MAXCHAN]; + const char *_capt_ptr [MAXCHAN]; + clear_function _clear_func; + play_function _play_func; + capt_function _capt_func; + void *_dummy [16]; +}; + +#endif diff --git a/libs/backends/wscript b/libs/backends/wscript index 01ae0218e5..d405751f78 100644 --- a/libs/backends/wscript +++ b/libs/backends/wscript @@ -3,6 +3,7 @@ from waflib.extras import autowaf as autowaf from waflib import Options import os import sys +import re # Mandatory variables top = '.' @@ -27,6 +28,9 @@ def configure(conf): if Options.options.build_dummy: backends += [ 'dummy' ] + if re.search ("linux", sys.platform) != None: + backends += [ 'alsa' ] + for i in backends: sub_config_and_use(conf, i) @@ -39,5 +43,9 @@ def build(bld): if bld.is_defined('HAVE_DUMMY'): backends += [ 'dummy' ] + if re.search ("linux", sys.platform) != None: + if bld.is_defined('HAVE_ALSA'): + backends += [ 'alsa' ] + for i in backends: bld.recurse(i) |