Method pw_init

source/MaaKWinControlUnit/Screencap/PipeWireScreencap.cpp:793–836

// ===========================================================================

bool PipeWireScreencap::pw_init()
{
    // Create pw_thread_loop (standard event loop with integrated bg thread)
    pw_thread_loop_ = pw_thread_loop_new("MaaScreencap", nullptr);
    if (!pw_thread_loop_) {
        LogError << "Failed to create PipeWire thread loop";
        return false;
    }

    pw_loop_ = pw_thread_loop_get_loop(pw_thread_loop_);

    pw_context_ = pw_context_new(pw_loop_, nullptr, 0);
    if (!pw_context_) {
        LogError << "Failed to create PipeWire context";
        close_internal();
        return false;
    }

    if (pipewire_fd_ < 0) {
        LogError << "Invalid PipeWire FD (missing OpenPipeWireRemote?)";
        close_internal();
        return false;
    }

    // Connect to KWin's private PipeWire instance via the portal FD
    pw_core_ = pw_context_connect_fd(pw_context_, pipewire_fd_, nullptr, 0);
    if (!pw_core_) {
        LogError << "Failed to connect via portal PipeWire FD";
        close_internal();
        return false;
    }

    // pw_context_connect_fd takes ownership of pipewire_fd_
    pipewire_fd_ = -1;

    // Register core event listener for error detection (e.g. EPIPE on disconnect).
    static const struct pw_core_events core_events = {
        .version = PW_VERSION_CORE_EVENTS,
        .error = pw_on_core_error,
    };
    pw_core_add_listener(pw_core_, &core_hook_, &core_events, this);

    return true;
}

bool PipeWireScreencap::pw_create_stream()
{