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import logging
import requests
import json
import asyncio
import aioshutil
from io import BytesIO
from functools import partial
from typing import Union, Optional
from enum import Enum
from ..api.errors import ApiResponseError
from ..util import Addr
class FrameSize(Enum):
UXGA_1600x1200 = 13
SXGA_1280x1024 = 12
HD_1280x720 = 11
XGA_1024x768 = 10
SVGA_800x600 = 9
VGA_640x480 = 8
HVGA_480x320 = 7
CIF_400x296 = 6
QVGA_320x240 = 5
N_240x240 = 4
HQVGA_240x176 = 3
QCIF_176x144 = 2
QQVGA_160x120 = 1
N_96x96 = 0
class WBMode(Enum):
AUTO = 0
SUNNY = 1
CLOUDY = 2
OFFICE = 3
HOME = 4
def _assert_bounds(n: int, min: int, max: int):
if not min <= n <= max:
raise ValueError(f'value must be between {min} and {max}')
class WebClient:
def __init__(self,
addr: Addr):
self.endpoint = f'http://{addr[0]}:{addr[1]}'
self.logger = logging.getLogger(self.__class__.__name__)
self.delay = 0
self.isfirstrequest = True
async def syncsettings(self, settings) -> bool:
status = await self.getstatus()
self.logger.debug(f'syncsettings: status={status}')
changed_anything = False
for name, value in settings.items():
server_name = name
if name == 'aec_dsp':
server_name = 'aec2'
if server_name not in status:
# legacy compatibility
if server_name != 'vflip':
self.logger.warning(f'syncsettings: field `{server_name}` not found in camera status')
continue
try:
# server returns 0 or 1 for bool values
if type(value) is bool:
value = int(value)
if status[server_name] == value:
continue
except KeyError as exc:
if name != 'vflip':
self.logger.error(exc)
try:
# fix for cases like when field is called raw_gma, but method is setrawgma()
name = name.replace('_', '')
func = getattr(self, f'set{name}')
self.logger.debug(f'syncsettings: calling set{name}({value})')
await func(value)
changed_anything = True
except AttributeError as exc:
self.logger.exception(exc)
self.logger.error(f'syncsettings: method set{name}() not found')
return changed_anything
def setdelay(self, delay: int):
self.delay = delay
async def capture(self, output: Optional[str] = None) -> Union[BytesIO, bool]:
kw = {}
if output:
kw['save_to'] = output
else:
kw['as_bytes'] = True
return await self._call('capture', **kw)
async def getstatus(self):
return json.loads(await self._call('status'))
async def setflash(self, enable: bool):
await self._control('flash', int(enable))
async def setframesize(self, fs: Union[int, FrameSize]):
if type(fs) is int:
fs = FrameSize(fs)
await self._control('framesize', fs.value)
async def sethmirror(self, enable: bool):
await self._control('hmirror', int(enable))
async def setvflip(self, enable: bool):
await self._control('vflip', int(enable))
async def setawb(self, enable: bool):
await self._control('awb', int(enable))
async def setawbgain(self, enable: bool):
await self._control('awb_gain', int(enable))
async def setwbmode(self, mode: WBMode):
await self._control('wb_mode', mode.value)
async def setaecsensor(self, enable: bool):
await self._control('aec', int(enable))
async def setaecdsp(self, enable: bool):
await self._control('aec2', int(enable))
async def setagc(self, enable: bool):
await self._control('agc', int(enable))
async def setagcgain(self, gain: int):
_assert_bounds(gain, 1, 31)
await self._control('agc_gain', gain)
async def setgainceiling(self, gainceiling: int):
_assert_bounds(gainceiling, 2, 128)
await self._control('gainceiling', gainceiling)
async def setbpc(self, enable: bool):
await self._control('bpc', int(enable))
async def setwpc(self, enable: bool):
await self._control('wpc', int(enable))
async def setrawgma(self, enable: bool):
await self._control('raw_gma', int(enable))
async def setlenscorrection(self, enable: bool):
await self._control('lenc', int(enable))
async def setdcw(self, enable: bool):
await self._control('dcw', int(enable))
async def setcolorbar(self, enable: bool):
await self._control('colorbar', int(enable))
async def setquality(self, q: int):
_assert_bounds(q, 4, 63)
await self._control('quality', q)
async def setbrightness(self, brightness: int):
_assert_bounds(brightness, -2, -2)
await self._control('brightness', brightness)
async def setcontrast(self, contrast: int):
_assert_bounds(contrast, -2, 2)
await self._control('contrast', contrast)
async def setsaturation(self, saturation: int):
_assert_bounds(saturation, -2, 2)
await self._control('saturation', saturation)
async def _control(self, var: str, value: Union[int, str]):
return await self._call('control', params={'var': var, 'val': value})
async def _call(self,
method: str,
params: Optional[dict] = None,
save_to: Optional[str] = None,
as_bytes=False) -> Union[str, bool, BytesIO]:
loop = asyncio.get_event_loop()
if not self.isfirstrequest and self.delay > 0:
sleeptime = self.delay / 1000
self.logger.debug(f'sleeping for {sleeptime}')
await asyncio.sleep(sleeptime)
self.isfirstrequest = False
url = f'{self.endpoint}/{method}'
self.logger.debug(f'calling {url}, params: {params}')
kwargs = {}
if params:
kwargs['params'] = params
if save_to:
kwargs['stream'] = True
r = await loop.run_in_executor(None,
partial(requests.get, url, **kwargs))
if r.status_code != 200:
raise ApiResponseError(status_code=r.status_code)
if as_bytes:
return BytesIO(r.content)
if save_to:
r.raise_for_status()
with open(save_to, 'wb') as f:
await aioshutil.copyfileobj(r.raw, f)
return True
return r.text
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