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Puls der Zeit
Prototype a basic stereo-playback only pulseaudio backend.
This commit is contained in:
Robin Gareus
parent
d70b03ae61
commit
384c97e12d
5 changed files with 2272 additions and 1 deletions
427
libs/backends/pulseaudio/pulseaudio_backend.h
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427
libs/backends/pulseaudio/pulseaudio_backend.h
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/*
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* Copyright (C) 2014,2019 Robin Gareus <robin@gareus.org>
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* Copyright (C) 2013 Paul Davis
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#ifndef __libbackend_pulse_audiobackend_h__
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#define __libbackend_pulse_audiobackend_h__
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#include <map>
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#include <set>
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#include <string>
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#include <vector>
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#include <pthread.h>
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#include <stdint.h>
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#include <pulse/pulseaudio.h>
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#include <boost/shared_ptr.hpp>
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#include "ardour/audio_backend.h"
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#include "ardour/dsp_load_calculator.h"
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#include "pbd/natsort.h"
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#define MaxPulseMidiEventSize (256)
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namespace ARDOUR {
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class PulseAudioBackend;
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class PulseMidiEvent
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{
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public:
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PulseMidiEvent (const pframes_t timestamp, const uint8_t* data, size_t size);
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PulseMidiEvent (const PulseMidiEvent& other);
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size_t size () const { return _size; };
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pframes_t timestamp () const { return _timestamp; };
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const uint8_t* data () const { return _data; };
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const uint8_t* const_data () const { return _data; };
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bool operator< (const PulseMidiEvent& other) const { return timestamp () < other.timestamp (); };
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private:
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size_t _size;
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pframes_t _timestamp;
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uint8_t _data[MaxPulseMidiEventSize];
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};
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typedef std::vector<boost::shared_ptr<PulseMidiEvent> > PulseMidiBuffer;
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class PulsePort
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{
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protected:
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PulsePort (PulseAudioBackend& b, const std::string&, PortFlags);
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public:
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virtual ~PulsePort ();
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const std::string& name () const { return _name; }
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const std::string& pretty_name () const { return _pretty_name; }
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PortFlags flags () const { return _flags; }
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int set_name (const std::string& name) { _name = name; return 0; }
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int set_pretty_name (const std::string& name) { _pretty_name = name; return 0; }
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virtual DataType type () const = 0;
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virtual void* get_buffer (pframes_t nframes) = 0;
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bool is_input () const { return flags () & IsInput; }
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bool is_output () const { return flags () & IsOutput; }
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bool is_physical () const { return flags () & IsPhysical; }
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bool is_terminal () const { return flags () & IsTerminal; }
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bool is_connected () const { return _connections.size () != 0; }
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bool is_connected (const PulsePort* port) const;
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bool is_physically_connected () const;
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int connect (PulsePort* port);
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int disconnect (PulsePort* port);
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void disconnect_all ();
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const std::set<PulsePort*>&
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get_connections () const
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{
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return _connections;
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}
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const LatencyRange
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latency_range (bool for_playback) const
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{
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return for_playback ? _playback_latency_range : _capture_latency_range;
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}
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void set_latency_range (const LatencyRange& latency_range, bool for_playback);
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void update_connected_latency (bool for_playback);
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private:
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PulseAudioBackend& _pulse_backend;
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std::string _name;
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std::string _pretty_name;
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const PortFlags _flags;
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LatencyRange _capture_latency_range;
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LatencyRange _playback_latency_range;
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std::set<PulsePort*> _connections;
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void _connect (PulsePort*, bool);
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void _disconnect (PulsePort*, bool);
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}; // class PulsePort
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class PulseAudioPort : public PulsePort
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{
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public:
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PulseAudioPort (PulseAudioBackend& b, const std::string&, PortFlags);
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~PulseAudioPort ();
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DataType type () const { return DataType::AUDIO; };
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Sample* buffer () { return _buffer; }
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const Sample* const_buffer () const { return _buffer; }
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void* get_buffer (pframes_t nframes);
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private:
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Sample _buffer[8192];
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}; // class PulseAudioPort
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class PulseMidiPort : public PulsePort
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{
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public:
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PulseMidiPort (PulseAudioBackend& b, const std::string&, PortFlags);
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~PulseMidiPort ();
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DataType type () const { return DataType::MIDI; };
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void* get_buffer (pframes_t nframes);
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const PulseMidiBuffer* const_buffer () const { return &_buffer; }
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private:
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PulseMidiBuffer _buffer;
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}; // class PulseMidiPort
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class PulseAudioBackend : public AudioBackend
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{
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friend class PulsePort;
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public:
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PulseAudioBackend (AudioEngine& e, AudioBackendInfo& info);
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~PulseAudioBackend ();
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/* AUDIOBACKEND API */
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std::string name () const;
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bool is_realtime () const;
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std::vector<DeviceStatus> enumerate_devices () const;
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std::vector<float> available_sample_rates (const std::string& device) const;
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std::vector<uint32_t> available_buffer_sizes (const std::string& device) const;
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uint32_t available_input_channel_count (const std::string& device) const;
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uint32_t available_output_channel_count (const std::string& device) const;
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bool can_change_sample_rate_when_running () const;
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bool can_change_buffer_size_when_running () const;
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int set_device_name (const std::string&);
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int set_sample_rate (float);
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int set_buffer_size (uint32_t);
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int set_interleaved (bool yn);
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int set_input_channels (uint32_t);
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int set_output_channels (uint32_t);
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int set_systemic_input_latency (uint32_t);
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int set_systemic_output_latency (uint32_t);
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int set_systemic_midi_input_latency (std::string const, uint32_t) { return 0; }
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int set_systemic_midi_output_latency (std::string const, uint32_t) { return 0; }
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int reset_device () { return 0; };
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/* Retrieving parameters */
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std::string device_name () const;
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float sample_rate () const;
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uint32_t buffer_size () const;
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bool interleaved () const;
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uint32_t input_channels () const;
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uint32_t output_channels () const;
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uint32_t systemic_input_latency () const;
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uint32_t systemic_output_latency () const;
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uint32_t systemic_midi_input_latency (std::string const) const { return 0; }
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uint32_t systemic_midi_output_latency (std::string const) const { return 0; }
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/* External control app */
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std::string control_app_name () const { return std::string (); }
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void launch_control_app () { }
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/* MIDI */
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std::vector<std::string> enumerate_midi_options () const;
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std::vector<DeviceStatus> enumerate_midi_devices () const;
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int set_midi_option (const std::string&);
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std::string midi_option () const;
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int set_midi_device_enabled (std::string const, bool) { return 0; }
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bool midi_device_enabled (std::string const) const { return true; }
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bool can_set_systemic_midi_latencies () const { return false; }
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/* State Control */
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protected:
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int _start (bool for_latency_measurement);
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public:
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int stop ();
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int freewheel (bool);
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float dsp_load () const;
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size_t raw_buffer_size (DataType t);
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/* Process time */
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samplepos_t sample_time ();
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samplepos_t sample_time_at_cycle_start ();
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pframes_t samples_since_cycle_start ();
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int create_process_thread (boost::function<void()> func);
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int join_process_threads ();
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bool in_process_thread ();
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uint32_t process_thread_count ();
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void update_latencies ();
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/* PORTENGINE API */
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void* private_handle () const;
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const std::string& my_name () const;
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uint32_t port_name_size () const;
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int set_port_name (PortHandle, const std::string&);
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std::string get_port_name (PortHandle) const;
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PortFlags get_port_flags (PortHandle) const;
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PortHandle get_port_by_name (const std::string&) const;
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int get_port_property (PortHandle, const std::string& key, std::string& value, std::string& type) const;
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int set_port_property (PortHandle, const std::string& key, const std::string& value, const std::string& type);
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int get_ports (const std::string& port_name_pattern, DataType type, PortFlags flags, std::vector<std::string>&) const;
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DataType port_data_type (PortHandle) const;
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PortHandle register_port (const std::string& shortname, ARDOUR::DataType, ARDOUR::PortFlags);
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void unregister_port (PortHandle);
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int connect (const std::string& src, const std::string& dst);
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int disconnect (const std::string& src, const std::string& dst);
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int connect (PortHandle, const std::string&);
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int disconnect (PortHandle, const std::string&);
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int disconnect_all (PortHandle);
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bool connected (PortHandle, bool process_callback_safe);
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bool connected_to (PortHandle, const std::string&, bool process_callback_safe);
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bool physically_connected (PortHandle, bool process_callback_safe);
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int get_connections (PortHandle, std::vector<std::string>&, bool process_callback_safe);
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/* MIDI */
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int midi_event_get (pframes_t& timestamp, size_t& size, uint8_t const** buf, void* port_buffer, uint32_t event_index);
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int midi_event_put (void* port_buffer, pframes_t timestamp, const uint8_t* buffer, size_t size);
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uint32_t get_midi_event_count (void* port_buffer);
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void midi_clear (void* port_buffer);
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/* Monitoring */
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bool can_monitor_input () const;
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int request_input_monitoring (PortHandle, bool);
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int ensure_input_monitoring (PortHandle, bool);
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bool monitoring_input (PortHandle);
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/* Latency management */
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void set_latency_range (PortHandle, bool for_playback, LatencyRange);
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LatencyRange get_latency_range (PortHandle, bool for_playback);
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/* Discovering physical ports */
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bool port_is_physical (PortHandle) const;
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void get_physical_outputs (DataType type, std::vector<std::string>&);
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void get_physical_inputs (DataType type, std::vector<std::string>&);
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ChanCount n_physical_outputs () const;
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ChanCount n_physical_inputs () const;
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/* Getting access to the data buffer for a port */
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void* get_buffer (PortHandle, pframes_t);
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void* main_process_thread ();
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private:
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std::string _instance_name;
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/* pulse */
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struct pa_stream* p_stream;
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struct pa_context* p_context;
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struct pa_threaded_mainloop* p_mainloop;
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int init_pulse ();
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void close_pulse (bool unlock = false);
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int sync_pulse (pa_operation*);
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bool cork_pulse (bool);
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static void context_state_cb (pa_context*, void*);
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static void stream_state_cb (pa_stream*, void*);
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static void stream_request_cb (pa_stream*, size_t, void*);
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static void stream_latency_update_cb (pa_stream*, void*);
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static void stream_xrun_cb (pa_stream*, void*);
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static void stream_operation_cb (pa_stream*, int, void*);
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bool _operation_succeeded;
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bool _run; /* keep going or stop, ardour thread */
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bool _active; /* is running, process thread */
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bool _freewheel;
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bool _freewheeling;
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uint64_t _last_process_start;
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/* audio settings */
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float _samplerate;
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size_t _samples_per_period;
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uint32_t _systemic_audio_output_latency;
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static const size_t _max_buffer_size;
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/* processing */
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float _dsp_load;
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ARDOUR::DSPLoadCalculator _dsp_load_calc;
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samplecnt_t _processed_samples;
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pthread_t _main_thread;
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/* process threads */
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static void* pulse_process_thread (void*);
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std::vector<pthread_t> _threads;
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struct ThreadData {
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PulseAudioBackend* engine;
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boost::function<void()> f;
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size_t stacksize;
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ThreadData (PulseAudioBackend* e, boost::function<void()> fp, size_t stacksz)
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: engine (e), f (fp), stacksize (stacksz) {}
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};
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/* port engine */
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PortHandle add_port (const std::string& shortname, ARDOUR::DataType, ARDOUR::PortFlags);
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int register_system_ports ();
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void unregister_ports (bool system_only = false);
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void update_system_port_latecies ();
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std::vector<PulsePort*> _system_outputs;
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struct SortByPortName {
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bool operator() (const PulsePort* lhs, const PulsePort* rhs) const
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{
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return PBD::naturally_less (lhs->name ().c_str (), rhs->name ().c_str ());
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}
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};
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typedef std::map<std::string, PulsePort*> PortMap; // fast lookup in _ports
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typedef std::set<PulsePort*, SortByPortName> PortIndex; // fast lookup in _ports
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PortMap _portmap;
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PortIndex _ports;
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struct PortConnectData {
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std::string a;
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std::string b;
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bool c;
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PortConnectData (const std::string& a, const std::string& b, bool c)
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: a (a), b (b), c (c) {}
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};
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std::vector<PortConnectData*> _port_connection_queue;
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pthread_mutex_t _port_callback_mutex;
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bool _port_change_flag;
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void
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port_connect_callback (const std::string& a, const std::string& b, bool conn)
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{
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pthread_mutex_lock (&_port_callback_mutex);
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_port_connection_queue.push_back (new PortConnectData (a, b, conn));
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pthread_mutex_unlock (&_port_callback_mutex);
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}
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void
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port_connect_add_remove_callback ()
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{
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pthread_mutex_lock (&_port_callback_mutex);
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_port_change_flag = true;
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pthread_mutex_unlock (&_port_callback_mutex);
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}
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bool
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valid_port (PortHandle port) const
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{
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return std::find (_ports.begin (), _ports.end (), static_cast<PulsePort*> (port)) != _ports.end ();
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}
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PulsePort*
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find_port (const std::string& port_name) const
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{
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PortMap::const_iterator it = _portmap.find (port_name);
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if (it == _portmap.end ()) {
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return NULL;
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}
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return (*it).second;
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}
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}; // class PulseAudioBackend
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} // namespace
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#endif /* __libbackend_pulse_audiobackend_h__ */
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