/* * Copyright (C) 2014 Robin Gareus * 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 #include #include #include #include #include #include #include "ardour/types.h" #include "ardour/audio_backend.h" #include "zita-alsa-pcmi.h" #include "alsa_rawmidi.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 > 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& 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 _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 enumerate_devices () const; std::vector available_sample_rates (const std::string& device) const; std::vector 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 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 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&) 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&, 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&); void get_physical_inputs (DataType type, std::vector&); 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 _run; /* keep going or stop, ardour thread */ bool _active; /* is running, process thread */ bool _freewheeling; void enumerate_midi_devices (std::vector &) const; std::string _capture_device; std::string _playback_device; std::string _midi_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 _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 _threads; struct ThreadData { AlsaAudioBackend* engine; boost::function f; size_t stacksize; ThreadData (AlsaAudioBackend* e, boost::function 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_audio_ports (); int register_system_midi_ports (); void unregister_system_ports (); std::vector _ports; std::vector _system_inputs; std::vector _system_outputs; std::vector _system_midi_in; std::vector _system_midi_out; std::vector _rmidi_out; std::vector _rmidi_in; 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 _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::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__ */