use std::cell::RefCell;
use std::collections::HashMap;
use std::io::Cursor;
use std::iter::zip;
use std::mem;
use std::os::fd::{AsFd, AsRawFd, BorrowedFd};
use std::ptr::NonNull;
use std::rc::Rc;
use std::time::Duration;
use anyhow::Context as _;
use calloop::timer::{TimeoutAction, Timer};
use calloop::RegistrationToken;
use pipewire::context::ContextRc;
use pipewire::core::{CoreRc, PW_ID_CORE};
use pipewire::main_loop::MainLoopRc;
use pipewire::properties::PropertiesBox;
use pipewire::spa::buffer::DataType;
use pipewire::spa::param::format::{FormatProperties, MediaSubtype, MediaType};
use pipewire::spa::param::format_utils::parse_format;
use pipewire::spa::param::video::{VideoFormat, VideoInfoRaw};
use pipewire::spa::param::ParamType;
use pipewire::spa::pod::deserialize::PodDeserializer;
use pipewire::spa::pod::serialize::PodSerializer;
use pipewire::spa::pod::{self, ChoiceValue, Pod, PodPropFlags, Property, PropertyFlags};
use pipewire::spa::sys::*;
use pipewire::spa::utils::{
Choice, ChoiceEnum, ChoiceFlags, Direction, Fraction, Rectangle, SpaTypes,
};
use pipewire::spa::{self};
use pipewire::stream::{Stream, StreamFlags, StreamListener, StreamRc, StreamState};
use pipewire::sys::{pw_buffer, pw_stream_queue_buffer};
use smithay::backend::allocator::dmabuf::{AsDmabuf, Dmabuf};
use smithay::backend::allocator::format::FormatSet;
use smithay::backend::allocator::gbm::{GbmBuffer, GbmBufferFlags, GbmDevice};
use smithay::backend::allocator::{Format, Fourcc};
use smithay::backend::drm::DrmDeviceFd;
use smithay::backend::renderer::damage::OutputDamageTracker;
use smithay::backend::renderer::element::RenderElement;
use smithay::backend::renderer::gles::GlesRenderer;
use smithay::backend::renderer::sync::SyncPoint;
use smithay::output::{Output, OutputModeSource};
use smithay::reexports::calloop::generic::Generic;
use smithay::reexports::calloop::{Interest, LoopHandle, Mode, PostAction};
use smithay::reexports::gbm::Modifier;
use smithay::utils::{Physical, 