PPB_CameraDevice_Private_0_1 Struct Reference

#include <ppb_camera_device_private.h>

Public Attributes
PP_Resource(*	Create )(PP_Instance instance)
PP_Bool(*	IsCameraDevice )(PP_Resource resource)
int32_t(*	Open )(PP_Resource camera_device, struct PP_Var device_id, struct PP_CompletionCallback callback)
void(*	Close )(PP_Resource camera_device)
int32_t(*	GetCameraCapabilities )(PP_Resource camera_device, PP_Resource *capabilities, struct PP_CompletionCallback callback)

Detailed Description

To query camera capabilities:

1. Get a PPB_CameraDevice_Private object by Create().
2. Open() camera device with track id of MediaStream video track.
3. Call GetCameraCapabilities() to get a PPB_CameraCapabilities_Private object, which can be used to query camera capabilities.

Member Data Documentation

void(* PPB_CameraDevice_Private_0_1::Close)(PP_Resource camera_device)

Disconnects from the camera and cancels all pending requests. After this returns, no callbacks will be called. If PPB_CameraDevice_Private is destroyed and is not closed yet, this function will be automatically called. Calling this more than once has no effect.

Parameters

[in]

camera_device

A PP_Resource corresponding to a camera device resource.

PP_Resource(* PPB_CameraDevice_Private_0_1::Create)(PP_Instance instance)

Creates a PPB_CameraDevice_Private resource.

Parameters

[in]

instance

A PP_Instance identifying one instance of a module.

Returns

A PP_Resource corresponding to a PPB_CameraDevice_Private resource if successful, 0 if failed.

int32_t(* PPB_CameraDevice_Private_0_1::GetCameraCapabilities)(PP_Resource camera_device, PP_Resource *capabilities, struct PP_CompletionCallback callback)

Gets the camera capabilities.

The camera capabilities do not change for a given camera source.

Parameters

[in]	camera_device	A PP_Resource corresponding to a camera device resource.
[out]	capabilities	A PPB_CameraCapabilities_Private for storing the camera capabilities on success. Otherwise, the value will not be changed.
[in]	callback	PP_CompletionCallback to be called upon completion of GetCameraCapabilities().

Returns

An int32_t containing a result code from pp_errors.h.

PP_Bool(* PPB_CameraDevice_Private_0_1::IsCameraDevice)(PP_Resource resource)

Determines if a resource is a camera device resource.

Parameters

[in]

resource

The PP_Resource to test.

Returns

A PP_Bool with PP_TRUE if the given resource is a camera device resource or PP_FALSE otherwise.

int32_t(* PPB_CameraDevice_Private_0_1::Open)(PP_Resource camera_device, struct PP_Var device_id, struct PP_CompletionCallback callback)

Opens a camera device.

Parameters

[in]	camera_device	A PP_Resource corresponding to a camera device resource.
[in]	device_id	A PP_Var identifying a camera device. The type is string. The ID can be obtained from navigator.mediaDevices.enumerateDevices() or MediaStreamVideoTrack.id.
[in]	callback	A PP_CompletionCallback to be called upon completion of Open().

Returns

An error code from pp_errors.h.

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The documentation for this struct was generated from the following file:

• ppapi/c/private/ppb_camera_device_private.h