92 lines
2.4 KiB
C++
92 lines
2.4 KiB
C++
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#if defined(__EMSCRIPTEN__)
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#include <libremidi/backends/emscripten/midi_access.hpp>
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#include <libremidi/backends/emscripten/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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LIBREMIDI_INLINE midi_in_emscripten::midi_in_emscripten(
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input_configuration&& conf, emscripten_input_configuration&& apiconf)
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: configuration{std::move(conf), std::move(apiconf)}
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{
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}
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LIBREMIDI_INLINE midi_in_emscripten::~midi_in_emscripten()
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{
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// Close a connection if it exists.
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midi_in_emscripten::close_port();
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}
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LIBREMIDI_INLINE libremidi::API midi_in_emscripten::get_current_api() const noexcept
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{
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return libremidi::API::WEBMIDI;
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}
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LIBREMIDI_INLINE bool midi_in_emscripten::open_port(int portNumber, std::string_view)
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{
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auto& midi = webmidi_helpers::midi_access_emscripten::instance();
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if (portNumber < 0 || portNumber >= midi.input_count())
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{
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error<no_devices_found_error>(
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this->configuration, "midi_in_emscripten::open_port: no MIDI output sources found.");
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return false;
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}
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midi.open_input(portNumber, *this);
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portNumber_ = portNumber;
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return true;
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}
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LIBREMIDI_INLINE bool
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midi_in_emscripten::open_port(const libremidi::input_port& p, std::string_view nm)
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{
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return open_port(p.port, nm);
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}
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LIBREMIDI_INLINE bool midi_in_emscripten::open_virtual_port(std::string_view)
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{
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warning(configuration, "midi_in_emscripten::open_virtual_port: unsupported.");
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return false;
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}
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LIBREMIDI_INLINE void midi_in_emscripten::close_port()
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{
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auto& midi = webmidi_helpers::midi_access_emscripten::instance();
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midi.close_input(portNumber_, *this);
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}
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LIBREMIDI_INLINE void midi_in_emscripten::set_client_name(std::string_view)
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{
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warning(configuration, "midi_in_emscripten::set_client_name: unsupported.");
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}
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LIBREMIDI_INLINE void midi_in_emscripten::set_port_name(std::string_view)
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{
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warning(configuration, "midi_in_emscripten::set_port_name: unsupported.");
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}
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LIBREMIDI_INLINE int64_t midi_in_emscripten::absolute_timestamp() const noexcept
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{
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return system_ns();
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}
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LIBREMIDI_INLINE void
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midi_in_emscripten::on_input(double ts, unsigned char* begin, unsigned char* end)
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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 = false,
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};
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const auto to_ns = [=] { return 1e6 * ts; };
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m_processing.on_bytes({begin, end}, m_processing.timestamp<timestamp_info>(to_ns, 0));
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}
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}
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#endif
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