Merge branch 'master' of ch1p.io:homekit

8 files changed, 1104 insertions, 0 deletions

diff --git a/include/py/homekit/media/__init__.py b/include/py/homekit/media/__init__.py
new file mode 100644
index 0000000..6923105
--- /dev/null
+++ b/include/py/homekit/media/__init__.py
@@ -0,0 +1,22 @@
+import importlib
+import itertools
+
+__map__ = {
+    'types': ['MediaNodeType'],
+    'record_client': ['SoundRecordClient', 'CameraRecordClient', 'RecordClient'],
+    'node_server': ['MediaNodeServer'],
+    'node_client': ['SoundNodeClient', 'CameraNodeClient', 'MediaNodeClient'],
+    'storage': ['SoundRecordStorage', 'ESP32CameraRecordStorage', 'SoundRecordFile', 'CameraRecordFile', 'RecordFile'],
+    'record': ['SoundRecorder', 'CameraRecorder']
+}
+
+__all__ = list(itertools.chain(*__map__.values()))
+
+
+def __getattr__(name):
+    if name in __all__:
+        for file, names in __map__.items():
+            if name in names:
+                module = importlib.import_module(f'.{file}', __name__)
+                return getattr(module, name)
+    raise AttributeError(f"module {__name__!r} has no attribute {name!r}")
diff --git a/include/py/homekit/media/__init__.pyi b/include/py/homekit/media/__init__.pyi
new file mode 100644
index 0000000..77c2176
--- /dev/null
+++ b/include/py/homekit/media/__init__.pyi
@@ -0,0 +1,27 @@
+from .types import (
+    MediaNodeType as MediaNodeType
+)
+from .record_client import (
+    SoundRecordClient as SoundRecordClient,
+    CameraRecordClient as CameraRecordClient,
+    RecordClient as RecordClient
+)
+from .node_server import (
+    MediaNodeServer as MediaNodeServer
+)
+from .node_client import (
+    SoundNodeClient as SoundNodeClient,
+    CameraNodeClient as CameraNodeClient,
+    MediaNodeClient as MediaNodeClient
+)
+from .storage import (
+    SoundRecordStorage as SoundRecordStorage,
+    ESP32CameraRecordStorage as ESP32CameraRecordStorage,
+    SoundRecordFile as SoundRecordFile,
+    CameraRecordFile as CameraRecordFile,
+    RecordFile as RecordFile
+)
+from .record import (
+    SoundRecorder as SoundRecorder,
+    CameraRecorder as CameraRecorder
+)
\ No newline at end of file
diff --git a/include/py/homekit/media/node_client.py b/include/py/homekit/media/node_client.py
new file mode 100644
index 0000000..eb39898
--- /dev/null
+++ b/include/py/homekit/media/node_client.py
@@ -0,0 +1,119 @@
+import requests
+import shutil
+import logging
+
+from typing import Optional, Union, List
+from .storage import RecordFile
+from ..util import Addr
+from ..api.errors import ApiResponseError
+
+
+class MediaNodeClient:
+    def __init__(self, addr: Addr):
+        self.endpoint = f'http://{addr[0]}:{addr[1]}'
+        self.logger = logging.getLogger(self.__class__.__name__)
+
+    def record(self, duration: int):
+        return self._call('record/', params={"duration": duration})
+
+    def record_info(self, record_id: int):
+        return self._call(f'record/info/{record_id}/')
+
+    def record_forget(self, record_id: int):
+        return self._call(f'record/forget/{record_id}/')
+
+    def record_download(self, record_id: int, output: str):
+        return self._call(f'record/download/{record_id}/', save_to=output)
+
+    def storage_list(self, extended=False, as_objects=False) -> Union[List[str], List[dict], List[RecordFile]]:
+        r = self._call('storage/list/', params={'extended': int(extended)})
+        files = r['files']
+        if as_objects:
+            return self.record_list_from_serialized(files)
+        return files
+
+    @staticmethod
+    def record_list_from_serialized(files: Union[List[str], List[dict]]):
+        new_files = []
+        for f in files:
+            kwargs = {'remote': True}
+            if isinstance(f, dict):
+                name = f['filename']
+                kwargs['remote_filesize'] = f['filesize']
+            else:
+                name = f
+            item = RecordFile.create(name, **kwargs)
+            new_files.append(item)
+        return new_files
+
+    def storage_delete(self, file_id: str):
+        return self._call('storage/delete/', params={'file_id': file_id})
+
+    def storage_download(self, file_id: str, output: str):
+        return self._call('storage/download/', params={'file_id': file_id}, save_to=output)
+
+    def _call(self,
+              method: str,
+              params: dict = None,
+              save_to: Optional[str] = None):
+        kwargs = {}
+        if isinstance(params, dict):
+            kwargs['params'] = params
+        if save_to:
+            kwargs['stream'] = True
+
+        url = f'{self.endpoint}/{method}'
+        self.logger.debug(f'calling {url}, kwargs: {kwargs}')
+
+        r = requests.get(url, **kwargs)
+        if r.status_code != 200:
+            response = r.json()
+            raise ApiResponseError(status_code=r.status_code,
+                                   error_type=response['error'],
+                                   error_message=response['message'] or None,
+                                   error_stacktrace=response['stacktrace'] if 'stacktrace' in response else None)
+
+        if save_to:
+            r.raise_for_status()
+            with open(save_to, 'wb') as f:
+                shutil.copyfileobj(r.raw, f)
+            return True
+
+        return r.json()['response']
+
+
+class SoundNodeClient(MediaNodeClient):
+    def amixer_get_all(self):
+        return self._call('amixer/get-all/')
+
+    def amixer_get(self, control: str):
+        return self._call(f'amixer/get/{control}/')
+
+    def amixer_incr(self, control: str, step: Optional[int] = None):
+        params = {'step': step} if step is not None else None
+        return self._call(f'amixer/incr/{control}/', params=params)
+
+    def amixer_decr(self, control: str, step: Optional[int] = None):
+        params = {'step': step} if step is not None else None
+        return self._call(f'amixer/decr/{control}/', params=params)
+
+    def amixer_mute(self, control: str):
+        return self._call(f'amixer/mute/{control}/')
+
+    def amixer_unmute(self, control: str):
+        return self._call(f'amixer/unmute/{control}/')
+
+    def amixer_cap(self, control: str):
+        return self._call(f'amixer/cap/{control}/')
+
+    def amixer_nocap(self, control: str):
+        return self._call(f'amixer/nocap/{control}/')
+
+
+class CameraNodeClient(MediaNodeClient):
+    def capture(self,
+                save_to: str,
+                with_flash: bool = False):
+        return self._call('capture/',
+                          {'with_flash': int(with_flash)},
+                          save_to=save_to)
diff --git a/include/py/homekit/media/node_server.py b/include/py/homekit/media/node_server.py
new file mode 100644
index 0000000..5d0803c
--- /dev/null
+++ b/include/py/homekit/media/node_server.py
@@ -0,0 +1,86 @@
+from .. import http
+from .record import Recorder
+from .types import RecordStatus
+from .storage import RecordStorage
+
+
+class MediaNodeServer(http.HTTPServer):
+    recorder: Recorder
+    storage: RecordStorage
+
+    def __init__(self,
+                 recorder: Recorder,
+                 storage: RecordStorage,
+                 *args, **kwargs):
+        super().__init__(*args, **kwargs)
+
+        self.recorder = recorder
+        self.storage = storage
+
+        self.get('/record/', self.do_record)
+        self.get('/record/info/{id}/', self.record_info)
+        self.get('/record/forget/{id}/', self.record_forget)
+        self.get('/record/download/{id}/', self.record_download)
+
+        self.get('/storage/list/', self.storage_list)
+        self.get('/storage/delete/', self.storage_delete)
+        self.get('/storage/download/', self.storage_download)
+
+    async def do_record(self, request: http.Request):
+        duration = int(request.query['duration'])
+        max = Recorder.get_max_record_time()*15
+        if not 0 < duration <= max:
+            raise ValueError(f'invalid duration: max duration is {max}')
+
+        record_id = self.recorder.record(duration)
+        return http.ok({'id': record_id})
+
+    async def record_info(self, request: http.Request):
+        record_id = int(request.match_info['id'])
+        info = self.recorder.get_info(record_id)
+        return http.ok(info.as_dict())
+
+    async def record_forget(self, request: http.Request):
+        record_id = int(request.match_info['id'])
+
+        info = self.recorder.get_info(record_id)
+        assert info.status in (RecordStatus.FINISHED, RecordStatus.ERROR), f"can't forget: record status is {info.status}"
+
+        self.recorder.forget(record_id)
+        return http.ok()
+
+    async def record_download(self, request: http.Request):
+        record_id = int(request.match_info['id'])
+
+        info = self.recorder.get_info(record_id)
+        assert info.status == RecordStatus.FINISHED, f"record status is {info.status}"
+
+        return http.FileResponse(info.file.path)
+
+    async def storage_list(self, request: http.Request):
+        extended = 'extended' in request.query and int(request.query['extended']) == 1
+
+        files = self.storage.getfiles(as_objects=extended)
+        if extended:
+            files = list(map(lambda file: file.__dict__(), files))
+
+        return http.ok({
+            'files': files
+        })
+
+    async def storage_delete(self, request: http.Request):
+        file_id = request.query['file_id']
+        file = self.storage.find(file_id)
+        if not file:
+            raise ValueError(f'file {file} not found')
+
+        self.storage.delete(file)
+        return http.ok()
+
+    async def storage_download(self, request):
+        file_id = request.query['file_id']
+        file = self.storage.find(file_id)
+        if not file:
+            raise ValueError(f'file {file} not found')
+
+        return http.FileResponse(file.path)
diff --git a/include/py/homekit/media/record.py b/include/py/homekit/media/record.py
new file mode 100644
index 0000000..cd7447a
--- /dev/null
+++ b/include/py/homekit/media/record.py
@@ -0,0 +1,461 @@
+import os
+import threading
+import logging
+import time
+import subprocess
+import signal
+
+from typing import Optional, List, Dict
+from ..util import find_child_processes, Addr
+from ..config import config
+from .storage import RecordFile, RecordStorage
+from .types import RecordStatus
+from ..camera.types import CameraType
+
+
+_history_item_timeout = 7200
+_history_cleanup_freq = 3600
+
+
+class RecordHistoryItem:
+    id: int
+    request_time: float
+    start_time: float
+    stop_time: float
+    relations: List[int]
+    status: RecordStatus
+    error: Optional[Exception]
+    file: Optional[RecordFile]
+    creation_time: float
+
+    def __init__(self, id):
+        self.id = id
+        self.request_time = 0
+        self.start_time = 0
+        self.stop_time = 0
+        self.relations = []
+        self.status = RecordStatus.WAITING
+        self.file = None
+        self.error = None
+        self.creation_time = time.time()
+
+    def add_relation(self, related_id: int):
+        self.relations.append(related_id)
+
+    def mark_started(self, start_time: float):
+        self.start_time = start_time
+        self.status = RecordStatus.RECORDING
+
+    def mark_finished(self, end_time: float, file: RecordFile):
+        self.stop_time = end_time
+        self.file = file
+        self.status = RecordStatus.FINISHED
+
+    def mark_failed(self, error: Exception):
+        self.status = RecordStatus.ERROR
+        self.error = error
+
+    def as_dict(self) -> dict:
+        data = {
+            'id': self.id,
+            'request_time': self.request_time,
+            'status': self.status.value,
+            'relations': self.relations,
+            'start_time': self.start_time,
+            'stop_time': self.stop_time,
+        }
+        if self.error:
+            data['error'] = str(self.error)
+        if self.file:
+            data['file'] = self.file.__dict__()
+        return data
+
+
+class RecordingNotFoundError(Exception):
+    pass
+
+
+class RecordHistory:
+    history: Dict[int, RecordHistoryItem]
+
+    def __init__(self):
+        self.history = {}
+        self.logger = logging.getLogger(self.__class__.__name__)
+
+    def add(self, record_id: int):
+        self.logger.debug(f'add: record_id={record_id}')
+
+        r = RecordHistoryItem(record_id)
+        r.request_time = time.time()
+
+        self.history[record_id] = r
+
+    def delete(self, record_id: int):
+        self.logger.debug(f'delete: record_id={record_id}')
+        del self.history[record_id]
+
+    def cleanup(self):
+        del_ids = []
+        for rid, item in self.history.items():
+            if item.creation_time < time.time()-_history_item_timeout:
+                del_ids.append(rid)
+        for rid in del_ids:
+            self.delete(rid)
+
+    def __getitem__(self, key):
+        if key not in self.history:
+            raise RecordingNotFoundError()
+
+        return self.history[key]
+
+    def __setitem__(self, key, value):
+        raise NotImplementedError('setting history item this way is prohibited')
+
+    def __contains__(self, key):
+        return key in self.history
+
+
+class Recording:
+    RECORDER_PROGRAM = None
+
+    start_time: float
+    stop_time: float
+    duration: int
+    record_id: int
+    recorder_program_pid: Optional[int]
+    process: Optional[subprocess.Popen]
+
+    g_record_id = 1
+
+    def __init__(self):
+        if self.RECORDER_PROGRAM is None:
+            raise RuntimeError('this is abstract class')
+
+        self.start_time = 0
+        self.stop_time = 0
+        self.duration = 0
+        self.process = None
+        self.recorder_program_pid = None
+        self.record_id = Recording.next_id()
+        self.logger = logging.getLogger(self.__class__.__name__)
+
+    def is_started(self) -> bool:
+        return self.start_time > 0 and self.stop_time > 0
+
+    def is_waiting(self):
+        return self.duration > 0
+
+    def ask_for(self, duration) -> int:
+        overtime = 0
+        orig_duration = duration
+
+        if self.is_started():
+            already_passed = time.time() - self.start_time
+            max_duration = Recorder.get_max_record_time() - already_passed
+            self.logger.debug(f'ask_for({orig_duration}): recording is in progress, already passed {already_passed}s, max_duration set to {max_duration}')
+        else:
+            max_duration = Recorder.get_max_record_time()
+
+        if duration > max_duration:
+            overtime = duration - max_duration
+            duration = max_duration
+
+            self.logger.debug(f'ask_for({orig_duration}): requested duration ({orig_duration}) is greater than max ({max_duration}), overtime is {overtime}')
+
+        self.duration += duration
+        if self.is_started():
+            til_end = self.stop_time - time.time()
+            if til_end < 0:
+                til_end = 0
+
+            _prev_stop_time = self.stop_time
+            _to_add = duration - til_end
+            if _to_add < 0:
+                _to_add = 0
+
+            self.stop_time += _to_add
+            self.logger.debug(f'ask_for({orig_duration}): adding {_to_add} to stop_time (before: {_prev_stop_time}, after: {self.stop_time})')
+
+        return overtime
+
+    def start(self, output: str):
+        assert self.start_time == 0 and self.stop_time == 0, "already started?!"
+        assert self.process is None, "self.process is not None, what the hell?"
+
+        cur = time.time()
+        self.start_time = cur
+        self.stop_time = cur + self.duration
+
+        cmd = self.get_command(output)
+        self.logger.debug(f'start: running `{cmd}`')
+        self.process = subprocess.Popen(cmd, shell=True, stdin=None, stdout=None, stderr=None, close_fds=True)
+
+        sh_pid = self.process.pid
+        self.logger.debug(f'start: started, pid of shell is {sh_pid}')
+
+        pid = self.find_recorder_program_pid(sh_pid)
+        if pid is not None:
+            self.recorder_program_pid = pid
+            self.logger.debug(f'start: pid of {self.RECORDER_PROGRAM} is {pid}')
+
+    def get_command(self, output: str) -> str:
+        pass
+
+    def stop(self):
+        if self.process:
+            if self.recorder_program_pid is None:
+                self.recorder_program_pid = self.find_recorder_program_pid(self.process.pid)
+
+            if self.recorder_program_pid is not None:
+                os.kill(self.recorder_program_pid, signal.SIGINT)
+                timeout = config['node']['process_wait_timeout']
+
+                self.logger.debug(f'stop: sent SIGINT to {self.recorder_program_pid}. now waiting up to {timeout} seconds...')
+                try:
+                    self.process.wait(timeout=timeout)
+                except subprocess.TimeoutExpired:
+                    self.logger.warning(f'stop: wait({timeout}): timeout expired, killing it')
+                    try:
+                        os.kill(self.recorder_program_pid, signal.SIGKILL)
+                        self.process.terminate()
+                    except Exception as exc:
+                        self.logger.exception(exc)
+            else:
+                self.logger.warning(f'stop: pid of {self.RECORDER_PROGRAM} is unknown, calling terminate()')
+                self.process.terminate()
+
+            rc = self.process.returncode
+            self.logger.debug(f'stop: rc={rc}')
+
+            self.process = None
+            self.recorder_program_pid = 0
+
+        self.duration = 0
+        self.start_time = 0
+        self.stop_time = 0
+
+    def find_recorder_program_pid(self, sh_pid: int):
+        try:
+            children = find_child_processes(sh_pid)
+        except OSError as exc:
+            self.logger.warning(f'failed to find child process of {sh_pid}: ' + str(exc))
+            return None
+
+        for child in children:
+            if self.RECORDER_PROGRAM in child.cmd:
+                return child.pid
+
+        return None
+
+    @staticmethod
+    def next_id() -> int:
+        cur_id = Recording.g_record_id
+        Recording.g_record_id += 1
+        return cur_id
+
+    def increment_id(self):
+        self.record_id = Recording.next_id()
+
+
+class Recorder:
+    TEMP_NAME = None
+
+    interrupted: bool
+    lock: threading.Lock
+    history_lock: threading.Lock
+    recording: Optional[Recording]
+    overtime: int
+    history: RecordHistory
+    next_history_cleanup_time: float
+    storage: RecordStorage
+
+    def __init__(self,
+                 storage: RecordStorage,
+                 recording: Recording):
+        if self.TEMP_NAME is None:
+            raise RuntimeError('this is abstract class')
+
+        self.storage = storage
+        self.recording = recording
+        self.interrupted = False
+        self.lock = threading.Lock()
+        self.history_lock = threading.Lock()
+        self.overtime = 0
+        self.history = RecordHistory()
+        self.next_history_cleanup_time = 0
+        self.logger = logging.getLogger(self.__class__.__name__)
+
+    def start_thread(self):
+        t = threading.Thread(target=self.loop)
+        t.daemon = True
+        t.start()
+
+    def loop(self) -> None:
+        tempname = os.path.join(self.storage.root, self.TEMP_NAME)
+
+        while not self.interrupted:
+            cur = time.time()
+            stopped = False
+            cur_record_id = None
+
+            if self.next_history_cleanup_time == 0:
+                self.next_history_cleanup_time = time.time() + _history_cleanup_freq
+            elif self.next_history_cleanup_time <= time.time():
+                self.logger.debug('loop: calling history.cleanup()')
+                try:
+                    self.history.cleanup()
+                except Exception as e:
+                    self.logger.error('loop: error while history.cleanup(): ' + str(e))
+                self.next_history_cleanup_time = time.time() + _history_cleanup_freq
+
+            with self.lock:
+                cur_record_id = self.recording.record_id
+                # self.logger.debug(f'cur_record_id={cur_record_id}')
+
+                if not self.recording.is_started():
+                    if self.recording.is_waiting():
+                        try:
+                            if os.path.exists(tempname):
+                                self.logger.warning(f'loop: going to start new recording, but {tempname} still exists, unlinking..')
+                                try:
+                                    os.unlink(tempname)
+                                except OSError as e:
+                                    self.logger.exception(e)
+                            self.recording.start(tempname)
+                            with self.history_lock:
+                                self.history[cur_record_id].mark_started(self.recording.start_time)
+                        except Exception as exc:
+                            self.logger.exception(exc)
+
+                            # there should not be any errors, but still..
+                            try:
+                                self.recording.stop()
+                            except Exception as exc:
+                                self.logger.exception(exc)
+
+                            with self.history_lock:
+                                self.history[cur_record_id].mark_failed(exc)
+
+                            self.logger.debug(f'loop: start exc path: calling increment_id()')
+                            self.recording.increment_id()
+                else:
+                    if cur >= self.recording.stop_time:
+                        try:
+                            start_time = self.recording.start_time
+                            stop_time = self.recording.stop_time
+                            self.recording.stop()
+
+                            saved_name = self.storage.save(tempname,
+                                                           record_id=cur_record_id,
+                                                           start_time=int(start_time),
+                                                           stop_time=int(stop_time))
+
+                            with self.history_lock:
+                                self.history[cur_record_id].mark_finished(stop_time, saved_name)
+                        except Exception as exc:
+                            self.logger.exception(exc)
+                            with self.history_lock:
+                                self.history[cur_record_id].mark_failed(exc)
+                        finally:
+                            self.logger.debug(f'loop: stop exc final path: calling increment_id()')
+                            self.recording.increment_id()
+
+                        stopped = True
+
+            if stopped and self.overtime > 0:
+                self.logger.info(f'recording {cur_record_id} is stopped, but we\'ve got overtime ({self.overtime})')
+                _overtime = self.overtime
+                self.overtime = 0
+
+                related_id = self.record(_overtime)
+                self.logger.info(f'enqueued another record with id {related_id}')
+
+                if cur_record_id is not None:
+                    with self.history_lock:
+                        self.history[cur_record_id].add_relation(related_id)
+
+            time.sleep(0.2)
+
+    def record(self, duration: int) -> int:
+        self.logger.debug(f'record: duration={duration}')
+        with self.lock:
+            overtime = self.recording.ask_for(duration)
+            self.logger.debug(f'overtime={overtime}')
+
+            if overtime > self.overtime:
+                self.overtime = overtime
+
+            if not self.recording.is_started():
+                with self.history_lock:
+                    self.history.add(self.recording.record_id)
+
+            return self.recording.record_id
+
+    def stop(self):
+        self.interrupted = True
+
+    def get_info(self, record_id: int) -> RecordHistoryItem:
+        with self.history_lock:
+            return self.history[record_id]
+
+    def forget(self, record_id: int):
+        with self.history_lock:
+            self.logger.info(f'forget: removing record {record_id} from history')
+            self.history.delete(record_id)
+
+    @staticmethod
+    def get_max_record_time() -> int:
+        return config['node']['record_max_time']
+
+
+class SoundRecorder(Recorder):
+    TEMP_NAME = 'temp.mp3'
+
+    def __init__(self, *args, **kwargs):
+        super().__init__(recording=SoundRecording(),
+                         *args, **kwargs)
+
+
+class CameraRecorder(Recorder):
+    TEMP_NAME = 'temp.mp4'
+
+    def __init__(self,
+                 camera_type: CameraType,
+                 *args, **kwargs):
+        if camera_type == CameraType.ESP32:
+            recording = ESP32CameraRecording(stream_addr=kwargs['stream_addr'])
+            del kwargs['stream_addr']
+        else:
+            raise RuntimeError(f'unsupported camera type {camera_type}')
+
+        super().__init__(recording=recording,
+                         *args, **kwargs)
+
+
+class SoundRecording(Recording):
+    RECORDER_PROGRAM = 'arecord'
+
+    def get_command(self, output: str) -> str:
+        arecord = config['arecord']['bin']
+        lame = config['lame']['bin']
+        b = config['lame']['bitrate']
+
+        return f'{arecord} -f S16 -r 44100 -t raw 2>/dev/null | {lame} -r -s 44.1 -b {b} -m m - {output} >/dev/null 2>/dev/null'
+
+
+class ESP32CameraRecording(Recording):
+    RECORDER_PROGRAM = 'esp32_capture.py'
+
+    stream_addr: Addr
+
+    def __init__(self, stream_addr: Addr):
+        super().__init__()
+        self.stream_addr = stream_addr
+
+    def get_command(self, output: str) -> str:
+        bin = config['esp32_capture']['bin']
+        return f'{bin} --addr {self.stream_addr[0]}:{self.stream_addr[1]} --output-directory {output} >/dev/null 2>/dev/null'
+
+    def start(self, output: str):
+        output = os.path.dirname(output)
+        return super().start(output)
\ No newline at end of file
diff --git a/include/py/homekit/media/record_client.py b/include/py/homekit/media/record_client.py
new file mode 100644
index 0000000..322495c
--- /dev/null
+++ b/include/py/homekit/media/record_client.py
@@ -0,0 +1,166 @@
+import time
+import logging
+import threading
+import os.path
+
+from tempfile import gettempdir
+from .record import RecordStatus
+from .node_client import SoundNodeClient, MediaNodeClient, CameraNodeClient
+from ..util import Addr
+from typing import Optional, Callable, Dict
+
+
+class RecordClient:
+    DOWNLOAD_EXTENSION = None
+
+    interrupted: bool
+    logger: logging.Logger
+    clients: Dict[str, MediaNodeClient]
+    awaiting: Dict[str, Dict[int, Optional[dict]]]
+    error_handler: Optional[Callable]
+    finished_handler: Optional[Callable]
+    download_on_finish: bool
+
+    def __init__(self,
+                 nodes: Dict[str, Addr],
+                 error_handler: Optional[Callable] = None,
+                 finished_handler: Optional[Callable] = None,
+                 download_on_finish=False):
+        if self.DOWNLOAD_EXTENSION is None:
+            raise RuntimeError('this is abstract class')
+
+        self.interrupted = False
+        self.logger = logging.getLogger(self.__class__.__name__)
+        self.clients = {}
+        self.awaiting = {}
+
+        self.download_on_finish = download_on_finish
+        self.error_handler = error_handler
+        self.finished_handler = finished_handler
+
+        self.awaiting_lock = threading.Lock()
+
+        self.make_clients(nodes)
+
+        try:
+            t = threading.Thread(target=self.loop)
+            t.daemon = True
+            t.start()
+        except (KeyboardInterrupt, SystemExit) as exc:
+            self.stop()
+            self.logger.exception(exc)
+
+    def make_clients(self, nodes: Dict[str, Addr]):
+        pass
+
+    def stop(self):
+        self.interrupted = True
+
+    def loop(self):
+        while not self.interrupted:
+            for node in self.awaiting.keys():
+                with self.awaiting_lock:
+                    record_ids = list(self.awaiting[node].keys())
+                if not record_ids:
+                    continue
+
+                self.logger.debug(f'loop: node `{node}` awaiting list: {record_ids}')
+
+                cl = self.getclient(node)
+                del_ids = []
+                for rid in record_ids:
+                    info = cl.record_info(rid)
+
+                    if info['relations']:
+                        for relid in info['relations']:
+                            self.wait_for_record(node, relid, self.awaiting[node][rid], is_relative=True)
+
+                    status = RecordStatus(info['status'])
+                    if status in (RecordStatus.FINISHED, RecordStatus.ERROR):
+                        if status == RecordStatus.FINISHED:
+                            if self.download_on_finish:
+                                local_fn = self.download(node, rid, info['file']['fileid'])
+                            else:
+                                local_fn = None
+                            self._report_finished(info, local_fn, self.awaiting[node][rid])
+                        else:
+                            self._report_error(info, self.awaiting[node][rid])
+                        del_ids.append(rid)
+                        self.logger.debug(f'record {rid}: status {status}')
+
+                if del_ids:
+                    self.logger.debug(f'deleting {del_ids} from {node}\'s awaiting list')
+                    with self.awaiting_lock:
+                        for del_id in del_ids:
+                            del self.awaiting[node][del_id]
+
+            time.sleep(5)
+
+        self.logger.info('loop ended')
+
+    def getclient(self, node: str):
+        return self.clients[node]
+
+    def record(self,
+               node: str,
+               duration: int,
+               userdata: Optional[dict] = None) -> int:
+        self.logger.debug(f'record: node={node}, duration={duration}, userdata={userdata}')
+
+        cl = self.getclient(node)
+        record_id = cl.record(duration)['id']
+        self.logger.debug(f'record: request sent, record_id={record_id}')
+
+        self.wait_for_record(node, record_id, userdata)
+        return record_id
+
+    def wait_for_record(self,
+                        node: str,
+                        record_id: int,
+                        userdata: Optional[dict] = None,
+                        is_relative=False):
+        with self.awaiting_lock:
+            if record_id not in self.awaiting[node]:
+                msg = f'wait_for_record: adding {record_id} to {node}'
+                if is_relative:
+                    msg += ' (by relation)'
+                self.logger.debug(msg)
+
+                self.awaiting[node][record_id] = userdata
+
+    def download(self, node: str, record_id: int, fileid: str):
+        dst = os.path.join(gettempdir(), f'{node}_{fileid}.{self.DOWNLOAD_EXTENSION}')
+        cl = self.getclient(node)
+        cl.record_download(record_id, dst)
+        return dst
+
+    def forget(self, node: str, rid: int):
+        self.getclient(node).record_forget(rid)
+
+    def _report_finished(self, *args):
+        if self.finished_handler:
+            self.finished_handler(*args)
+
+    def _report_error(self, *args):
+        if self.error_handler:
+            self.error_handler(*args)
+
+
+class SoundRecordClient(RecordClient):
+    DOWNLOAD_EXTENSION = 'mp3'
+    # clients: Dict[str, SoundNodeClient]
+
+    def make_clients(self, nodes: Dict[str, Addr]):
+        for node, addr in nodes.items():
+            self.clients[node] = SoundNodeClient(addr)
+            self.awaiting[node] = {}
+
+
+class CameraRecordClient(RecordClient):
+    DOWNLOAD_EXTENSION = 'mp4'
+    # clients: Dict[str, CameraNodeClient]
+
+    def make_clients(self, nodes: Dict[str, Addr]):
+        for node, addr in nodes.items():
+            self.clients[node] = CameraNodeClient(addr)
+            self.awaiting[node] = {}
\ No newline at end of file
diff --git a/include/py/homekit/media/storage.py b/include/py/homekit/media/storage.py
new file mode 100644
index 0000000..dd74ff8
--- /dev/null
+++ b/include/py/homekit/media/storage.py
@@ -0,0 +1,210 @@
+import os
+import re
+import shutil
+import logging
+
+from typing import Optional, Union, List
+from datetime import datetime
+from ..util import strgen
+
+logger = logging.getLogger(__name__)
+
+
+# record file
+# -----------
+
+class RecordFile:
+    EXTENSION = None
+
+    start_time: Optional[datetime]
+    stop_time: Optional[datetime]
+    record_id: Optional[int]
+    name: str
+    file_id: Optional[str]
+    remote: bool
+    remote_filesize: int
+    storage_root: str
+
+    human_date_dmt = '%d.%m.%y'
+    human_time_fmt = '%H:%M:%S'
+
+    @staticmethod
+    def create(filename: str, *args, **kwargs):
+        if filename.endswith(f'.{SoundRecordFile.EXTENSION}'):
+            return SoundRecordFile(filename, *args, **kwargs)
+        elif filename.endswith(f'.{CameraRecordFile.EXTENSION}'):
+            return CameraRecordFile(filename, *args, **kwargs)
+        else:
+            raise RuntimeError(f'unsupported file extension: {filename}')
+
+    def __init__(self, filename: str, remote=False, remote_filesize=None, storage_root='/'):
+        if self.EXTENSION is None:
+            raise RuntimeError('this is abstract class')
+
+        self.name = filename
+        self.storage_root = storage_root
+
+        self.remote = remote
+        self.remote_filesize = remote_filesize
+
+        m = re.match(r'^(\d{6}-\d{6})_(\d{6}-\d{6})_id(\d+)(_\w+)?\.'+self.EXTENSION+'$', filename)
+        if m:
+            self.start_time = datetime.strptime(m.group(1), RecordStorage.time_fmt)
+            self.stop_time = datetime.strptime(m.group(2), RecordStorage.time_fmt)
+            self.record_id = int(m.group(3))
+            self.file_id = (m.group(1) + '_' + m.group(2)).replace('-', '_')
+        else:
+            logger.warning(f'unexpected filename: {filename}')
+            self.start_time = None
+            self.stop_time = None
+            self.record_id = None
+            self.file_id = None
+
+    @property
+    def path(self):
+        if self.remote:
+            return RuntimeError('remote recording, can\'t get real path')
+
+        return os.path.realpath(os.path.join(
+            self.storage_root, self.name
+        ))
+
+    @property
+    def start_humantime(self) -> str:
+        if self.start_time is None:
+            return '?'
+        fmt = f'{RecordFile.human_date_dmt} {RecordFile.human_time_fmt}'
+        return self.start_time.strftime(fmt)
+
+    @property
+    def stop_humantime(self) -> str:
+        if self.stop_time is None:
+            return '?'
+        fmt = RecordFile.human_time_fmt
+        if self.start_time.date() != self.stop_time.date():
+            fmt = f'{RecordFile.human_date_dmt} {fmt}'
+        return self.stop_time.strftime(fmt)
+
+    @property
+    def start_unixtime(self) -> int:
+        if self.start_time is None:
+            return 0
+        return int(self.start_time.timestamp())
+
+    @property
+    def stop_unixtime(self) -> int:
+        if self.stop_time is None:
+            return 0
+        return int(self.stop_time.timestamp())
+
+    @property
+    def filesize(self):
+        if self.remote:
+            if self.remote_filesize is None:
+                raise RuntimeError('file is remote and remote_filesize is not set')
+            return self.remote_filesize
+        return os.path.getsize(self.path)
+
+    def __dict__(self) -> dict:
+        return {
+            'start_unixtime': self.start_unixtime,
+            'stop_unixtime': self.stop_unixtime,
+            'filename': self.name,
+            'filesize': self.filesize,
+            'fileid': self.file_id,
+            'record_id': self.record_id or 0,
+        }
+
+
+class PseudoRecordFile(RecordFile):
+    EXTENSION = 'null'
+
+    def __init__(self):
+        super().__init__('pseudo.null')
+
+    @property
+    def filesize(self):
+        return 0
+
+
+class SoundRecordFile(RecordFile):
+    EXTENSION = 'mp3'
+
+
+class CameraRecordFile(RecordFile):
+    EXTENSION = 'mp4'
+
+
+# record storage
+# --------------
+
+class RecordStorage:
+    EXTENSION = None
+
+    time_fmt = '%d%m%y-%H%M%S'
+
+    def __init__(self, root: str):
+        if self.EXTENSION is None:
+            raise RuntimeError('this is abstract class')
+
+        self.root = root
+
+    def getfiles(self, as_objects=False) -> Union[List[str], List[RecordFile]]:
+        files = []
+        for name in os.listdir(self.root):
+            path = os.path.join(self.root, name)
+            if os.path.isfile(path) and name.endswith(f'.{self.EXTENSION}'):
+                files.append(name if not as_objects else RecordFile.create(name, storage_root=self.root))
+        return files
+
+    def find(self, file_id: str) -> Optional[RecordFile]:
+        for name in os.listdir(self.root):
+            if os.path.isfile(os.path.join(self.root, name)) and name.endswith(f'.{self.EXTENSION}'):
+                item = RecordFile.create(name, storage_root=self.root)
+                if item.file_id == file_id:
+                    return item
+        return None
+
+    def purge(self):
+        files = self.getfiles()
+        if files:
+            logger = logging.getLogger(self.__name__)
+            for f in files:
+                try:
+                    path = os.path.join(self.root, f)
+                    logger.debug(f'purge: deleting {path}')
+                    os.unlink(path)
+                except OSError as exc:
+                    logger.exception(exc)
+
+    def delete(self, file: RecordFile):
+        os.unlink(file.path)
+
+    def save(self,
+             fn: str,
+             record_id: int,
+             start_time: int,
+             stop_time: int) -> RecordFile:
+
+        start_time_s = datetime.fromtimestamp(start_time).strftime(self.time_fmt)
+        stop_time_s = datetime.fromtimestamp(stop_time).strftime(self.time_fmt)
+
+        dst_fn = f'{start_time_s}_{stop_time_s}_id{record_id}'
+        if os.path.exists(os.path.join(self.root, dst_fn)):
+            dst_fn += strgen(4)
+        dst_fn += f'.{self.EXTENSION}'
+        dst_path = os.path.join(self.root, dst_fn)
+
+        shutil.move(fn, dst_path)
+        return RecordFile.create(dst_fn, storage_root=self.root)
+
+
+class SoundRecordStorage(RecordStorage):
+    EXTENSION = 'mp3'
+
+
+class ESP32CameraRecordStorage(RecordStorage):
+    EXTENSION = 'jpg'  # not used anyway
+
+    def save(self, *args, **kwargs):
+        return PseudoRecordFile()
\ No newline at end of file
diff --git a/include/py/homekit/media/types.py b/include/py/homekit/media/types.py
new file mode 100644
index 0000000..acbc291
--- /dev/null
+++ b/include/py/homekit/media/types.py
@@ -0,0 +1,13 @@
+from enum import Enum, auto
+
+
+class MediaNodeType(Enum):
+    SOUND = auto()
+    CAMERA = auto()
+
+
+class RecordStatus(Enum):
+    WAITING = auto()
+    RECORDING = auto()
+    FINISHED = auto()
+    ERROR = auto()