115 lines
3.1 KiB
C++
115 lines
3.1 KiB
C++
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#pragma once
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#include <libremidi/backends/jack/config.hpp>
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#include <libremidi/backends/jack/helpers.hpp>
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#include <libremidi/detail/midi_in.hpp>
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#include <libremidi/detail/midi_stream_decoder.hpp>
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#include <chrono>
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namespace libremidi
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{
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class midi_in_jack final
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: public midi1::in_api
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, public jack_helpers
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, public error_handler
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{
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public:
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struct
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: input_configuration
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, jack_input_configuration
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{
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} configuration;
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explicit midi_in_jack(input_configuration&& conf, jack_input_configuration&& apiconf)
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: configuration{std::move(conf), std::move(apiconf)}
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{
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auto status = connect(*this);
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if (status != jack_status_t{})
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warning(configuration, "midi_in_jack: " + std::to_string((int)jack_status_t{}));
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}
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~midi_in_jack() override
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{
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midi_in_jack::close_port();
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disconnect(*this);
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}
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void set_client_name(std::string_view) override
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{
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warning(configuration, "midi_in_jack: set_client_name unsupported");
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}
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libremidi::API get_current_api() const noexcept override { return libremidi::API::JACK_MIDI; }
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bool open_port(const input_port& port, std::string_view portName) override
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{
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if (!create_local_port(*this, portName, JackPortIsInput))
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return false;
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if (auto ret = jack_connect(this->client, port.port_name.c_str(), jack_port_name(this->port));
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ret != 0)
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{
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error<invalid_parameter_error>(
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configuration, "JACK: could not connect to port: " + port.port_name + " -> "
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+ jack_port_name(this->port));
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return false;
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}
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return true;
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}
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bool open_virtual_port(std::string_view portName) override
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{
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return create_local_port(*this, portName, JackPortIsInput);
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}
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void close_port() override { return do_close_port(); }
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void set_port_name(std::string_view portName) override
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{
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jack_port_rename(this->client, this->port, portName.data());
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}
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timestamp absolute_timestamp() const noexcept override
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{
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return 1000 * jack_frames_to_time(client, jack_frame_time(client));
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}
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int process(jack_nframes_t nframes)
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{
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static constexpr timestamp_backend_info timestamp_info{
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.has_absolute_timestamps = true,
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.absolute_is_monotonic = true,
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.has_samples = true,
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};
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void* buff = jack_port_get_buffer(this->port, nframes);
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// Timing
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jack_nframes_t current_frames{};
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jack_time_t current_usecs{}; // roughly CLOCK_MONOTONIC
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jack_time_t next_usecs{};
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float period_usecs{};
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jack_get_cycle_times(
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this->client, ¤t_frames, ¤t_usecs, &next_usecs, &period_usecs);
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// We have midi events in buffer
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uint32_t evCount = jack_midi_get_event_count(buff);
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for (uint32_t j = 0; j < evCount; j++)
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{
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jack_midi_event_t event{};
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jack_midi_event_get(&event, buff, j);
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const auto to_ns
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= [=, this] { return 1000 * jack_frames_to_time(client, current_frames + event.time); };
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m_processing.on_bytes(
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{event.buffer, event.buffer + event.size},
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m_processing.timestamp<timestamp_info>(to_ns, event.time));
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}
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return 0;
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}
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midi1::input_state_machine m_processing{this->configuration};
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};
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}
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