pipewire.cpp

    stream_events_ = {
        PW_VERSION_STREAM_EVENTS,
        .destroy = on_stream_destroy,
        .state_changed = on_stream_state_changed,
        .control_info = on_stream_control_info,
        .io_changed = on_stream_io_changed,
        .param_changed = on_stream_param_changed,
        .add_buffer = on_stream_add_buffer,
        .remove_buffer = on_stream_remove_buffer,
        .process = on_stream_process_static,
        .drained = on_stream_drained,
    };