fuchsia.camera2.hal

Added: 7

PROTOCOLS

Controller

Defined in fuchsia.camera2.hal/hal.fidl

This is the interface to the camera driver which allows setting up a given configuration and setting up a stream.

CreateStream

Set a particular configuration and create the requested stream. config_index : Configuration index from the vector which needs to be applied. stream_index : Stream index from the vector of streams provided within a config. stream : Stream channel for the stream requested image_format_index : Image format index which needs to be set up upon creation. If there is already an active configuration which is different than the one which is requested to be set, then the HAL will be closing all existing streams and honor this new setup call. If the new stream requested is already part of the existing running configuration the HAL will just be creating this new stream while the other stream still exists as is.

Request

Name	Type
`config_index`	`uint32`
`stream_index`	`uint32`
`image_format_index`	`uint32`
`stream`	`server_end:fuchsia.camera2/Stream`

DisableStreaming

Request

<EMPTY>

EnableStreaming

Enable/Disable Streaming

Request

<EMPTY>

GetDeviceInfo

Request

<EMPTY>

Response

Name	Type
`info`	`fuchsia.camera2/DeviceInfo`

GetNextConfig

Returns the next available configuration which the camera driver supports. Returns ZX_ERR_STOP if no new configurations are available.

Request

<EMPTY>

Response

Name	Type
`config`	`Config?`
`status`	`zx/Status`

STRUCTS

Config

Defined in fuchsia.camera2.hal/hal.fidl

Represents one configuration

Field	Type	Description	Default
`stream_configs`	`vector<StreamConfig>:64`		No default

StreamConfig

Defined in fuchsia.camera2.hal/hal.fidl

Represents one stream within a particular configuration.

Field	Type	Description	Default
`frame_rate`	`fuchsia.camera2/FrameRate`		No default
`constraints`	`fuchsia.sysmem/BufferCollectionConstraints`	`constraints` should allow for all the image formats listed in image_formats.	No default
`properties`	`fuchsia.camera2/StreamProperties`	Properties of the stream:	No default
`image_formats`	`vector<fuchsia.sysmem/ImageFormat_2>:256`	We need to specify both the constraints & the image formats because there are fixed set of resolutions supported by the Camera Controller so a range within the `constraints` won't be sufficient. Some streams support multiple resolutions for same configuration We would need to change the resolution runtime, without stopping the streaming. This provides a list of resolutions a stream would be providing. At least one format must be provided.	No default

CONSTANTS

Name	Value	Type	Description
MAX_CONFIGURATIONS	`256`	`uint64`	Maximum number of configurations per device.
MAX_STREAMS	`64`	`uint64`	Maximum number of streams per config.