libremidi update to v5.4.3 and added virtual midi out as default

2026-06-23 00:05:41 +02:00
parent dc0003232a
commit 51cd271b6f
166 changed files with 8135 additions and 2009 deletions
@@ -0,0 +1,182 @@
+#pragma once
+#include <libremidi/backends/pipewire/helpers.hpp>
+#include <libremidi/backends/pipewire_ump/config.hpp>
+#include <libremidi/detail/midi_out.hpp>
+
+#include <readerwriterqueue.h>
+
+NAMESPACE_LIBREMIDI::pipewire_ump
+{
+class midi_out_pipewire
+    : public midi2::out_api
+    , public pipewire_helpers
+    , public error_handler
+{
+public:
+  struct
+      : libremidi::output_configuration
+      , libremidi::pipewire_ump::output_configuration
+  {
+  } configuration;
+
+  midi_out_pipewire(
+      libremidi::output_configuration&& conf,
+      libremidi::pipewire_ump::output_configuration&& apiconf)
+      : configuration{std::move(conf), std::move(apiconf)}
+  {
+    if (auto ret = create_context(*this); ret != stdx::error{})
+    {
+      client_open_ = ret;
+      return;
+    }
+    if (auto ret = create_filter(*this); ret != stdx::error{})
+    {
+      client_open_ = ret;
+      return;
+    }
+    client_open_ = stdx::error{};
+  }
+
+  ~midi_out_pipewire() override
+  {
+    stop_thread();
+    do_close_port();
+    destroy_filter(*this);
+    destroy_context();
+    client_open_ = std::errc::not_connected;
+  }
+
+  libremidi::API get_current_api() const noexcept override { return libremidi::API::PIPEWIRE_UMP; }
+
+  stdx::error open_port(const output_port& out_port, std::string_view name) override
+  {
+    if (auto err = create_local_port(*this, name, SPA_DIRECTION_OUTPUT, "32 bit raw UMP");
+        err != stdx::error{})
+      return err;
+
+    this->filter->set_port_buffer(configuration.output_buffer_size);
+
+    if (auto err = link_ports(*this, out_port); err != stdx::error{})
+      return err;
+
+    start_thread();
+    return stdx::error{};
+  }
+
+  stdx::error open_virtual_port(std::string_view name) override
+  {
+    if (auto err = create_local_port(*this, name, SPA_DIRECTION_OUTPUT, "32 bit raw UMP");
+        err != stdx::error{})
+      return err;
+
+    this->filter->set_port_buffer(configuration.output_buffer_size);
+
+    start_thread();
+    return stdx::error{};
+  }
+
+  stdx::error close_port() override
+  {
+    stop_thread();
+    return do_close_port();
+  }
+
+  stdx::error set_port_name(std::string_view port_name) override { return rename_port(port_name); }
+
+  int process(spa_io_position* pos)
+  {
+    m_process_clock.store(pos->clock.nsec, std::memory_order_relaxed);
+    const auto b = pw.filter_dequeue_buffer(this->filter->port);
+    if (!b)
+      return 1;
+
+    const auto buf = b->buffer;
+    const auto d = &buf->datas[0];
+
+    if (d->data == nullptr)
+      return 1;
+
+    spa_pod_builder build;
+    spa_zero(build);
+    spa_pod_builder_init(&build, d->data, d->maxsize);
+
+    spa_pod_frame f;
+    spa_pod_builder_push_sequence(&build, &f, 0);
+
+    // for all events
+    while (auto m_ptr = m_queue.peek())
+    {
+      auto& m = *m_ptr;
+
+      spa_pod_builder_control(&build, static_cast<int32_t>(m.timestamp), SPA_CONTROL_UMP);
+      int res = spa_pod_builder_bytes(&build, m.data, cmidi2_ump_get_message_size_bytes(m.data));
+
+      // Try again next buffer
+      if (res == -ENOSPC)
+        break;
+
+      // Recycle the memory
+      m_queue.pop();
+    }
+    spa_pod_builder_pop(&build, &f);
+
+    int n_fill_frames = build.state.offset;
+    if (n_fill_frames > 0)
+    {
+      d->chunk->offset = 0;
+      d->chunk->stride = 1;
+      d->chunk->size = n_fill_frames;
+      b->size = n_fill_frames;
+
+      pw.filter_queue_buffer(this->filter->port, b);
+      return 0;
+    }
+
+    pw.filter_flush(this->filter->filter, true);
+
+    return 0;
+  }
+
+  stdx::error send_ump(const uint32_t* message, size_t size) override
+  {
+    // FIXME
+    if (size > 4)
+      return std::errc::message_size;
+
+    libremidi::ump m;
+    std::copy_n(message, size, m.data);
+    m.timestamp = 0;
+    m_queue.enqueue(std::move(m));
+    return stdx::error{};
+  }
+
+  int convert_timestamp(int64_t user) const noexcept
+  {
+    switch (configuration.timestamps)
+    {
+      case timestamp_mode::AudioFrame:
+        return static_cast<int>(user);
+
+      default:
+        // TODO
+        return 0;
+    }
+  }
+
+  stdx::error schedule_ump(int64_t ts, const uint32_t* message, size_t size) override
+  {
+    // FIXME
+    if (size > 4)
+      return std::errc::message_size;
+
+    libremidi::ump m;
+    std::copy_n(message, size, m.data);
+    m.timestamp = convert_timestamp(ts);
+    m_queue.enqueue(std::move(m)); // FIXME actually send them scheudled
+    return stdx::error{};
+  }
+
+  moodycamel::ReaderWriterQueue<libremidi::ump> m_queue;
+  std::atomic_int64_t m_process_clock = 0;
+};
+}