Add ESPHome Camera (#22107)

* Add ESPHome Camera

* Bump aioesphomeapi to 1.7.0

homeassistant/components/esphome/__init__.py

@@ -32,12 +32,10 @@ if TYPE_CHECKING:
         ServiceCall, UserService
 
 DOMAIN = 'esphome'
-REQUIREMENTS = ['aioesphomeapi==1.6.0']
+REQUIREMENTS = ['aioesphomeapi==1.7.0']
 
 _LOGGER = logging.getLogger(__name__)
 
-DOMAIN = 'esphome'
-
 DISPATCHER_UPDATE_ENTITY = 'esphome_{entry_id}_update_{component_key}_{key}'
 DISPATCHER_REMOVE_ENTITY = 'esphome_{entry_id}_remove_{component_key}_{key}'
 DISPATCHER_ON_LIST = 'esphome_{entry_id}_on_list'
@@ -50,6 +48,7 @@ STORAGE_VERSION = 1
 # The HA component types this integration supports
 HA_COMPONENTS = [
     'binary_sensor',
+    'camera',
     'cover',
     'fan',
     'light',
@@ -543,7 +542,7 @@ class EsphomeEntity(Entity):
         self._remove_callbacks.append(
             async_dispatcher_connect(self.hass,
                                      DISPATCHER_UPDATE_ENTITY.format(**kwargs),
-                                     self.async_schedule_update_ha_state)
+                                     self._on_update)
         )
 
         self._remove_callbacks.append(
@@ -558,6 +557,10 @@ class EsphomeEntity(Entity):
                 self.async_schedule_update_ha_state)
         )
 
+    async def _on_update(self):
+        """Update the entity state when state or static info changed."""
+        self.async_schedule_update_ha_state()
+
     async def async_will_remove_from_hass(self):
         """Unregister callbacks."""
         for remove_callback in self._remove_callbacks:

homeassistant/components/esphome/camera.py

@@ -0,0 +1,83 @@
+"""Support for ESPHome cameras."""
+import asyncio
+import logging
+from typing import Optional, TYPE_CHECKING
+
+from homeassistant.components import camera
+from homeassistant.components.camera import Camera
+from homeassistant.config_entries import ConfigEntry
+from homeassistant.helpers.typing import HomeAssistantType
+from . import EsphomeEntity, platform_async_setup_entry
+
+if TYPE_CHECKING:
+    # pylint: disable=unused-import
+    from aioesphomeapi import CameraInfo, CameraState  # noqa
+
+DEPENDENCIES = ['esphome']
+_LOGGER = logging.getLogger(__name__)
+
+
+async def async_setup_entry(hass: HomeAssistantType,
+                            entry: ConfigEntry, async_add_entities) -> None:
+    """Set up esphome cameras based on a config entry."""
+    # pylint: disable=redefined-outer-name
+    from aioesphomeapi import CameraInfo, CameraState  # noqa
+
+    await platform_async_setup_entry(
+        hass, entry, async_add_entities,
+        component_key='camera',
+        info_type=CameraInfo, entity_type=EsphomeCamera,
+        state_type=CameraState
+    )
+
+
+class EsphomeCamera(Camera, EsphomeEntity):
+    """A camera implementation for ESPHome."""
+
+    def __init__(self, entry_id: str, component_key: str, key: int):
+        """Initialize."""
+        Camera.__init__(self)
+        EsphomeEntity.__init__(self, entry_id, component_key, key)
+        self._image_cond = asyncio.Condition()
+
+    @property
+    def _static_info(self) -> 'CameraInfo':
+        return super()._static_info
+
+    @property
+    def _state(self) -> Optional['CameraState']:
+        return super()._state
+
+    async def _on_update(self):
+        """Notify listeners of new image when update arrives."""
+        await super()._on_update()
+        async with self._image_cond:
+            self._image_cond.notify_all()
+
+    async def async_camera_image(self) -> Optional[bytes]:
+        """Return single camera image bytes."""
+        if not self.available:
+            return None
+        await self._client.request_single_image()
+        async with self._image_cond:
+            await self._image_cond.wait()
+            if not self.available:
+                return None
+            return self._state.image[:]
+
+    async def _async_camera_stream_image(self) -> Optional[bytes]:
+        """Return a single camera image in a stream."""
+        if not self.available:
+            return None
+        await self._client.request_image_stream()
+        async with self._image_cond:
+            await self._image_cond.wait()
+            if not self.available:
+                return None
+            return self._state.image[:]
+
+    async def handle_async_mjpeg_stream(self, request):
+        """Serve an HTTP MJPEG stream from the camera."""
+        return await camera.async_get_still_stream(
+            request, self._async_camera_stream_image,
+            camera.DEFAULT_CONTENT_TYPE, 0.0)

requirements_all.txt

@@ -109,7 +109,7 @@ aioautomatic==0.6.5
 aiodns==1.1.1
 
 # homeassistant.components.esphome
-aioesphomeapi==1.6.0
+aioesphomeapi==1.7.0
 
 # homeassistant.components.freebox
 aiofreepybox==0.0.6