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Data Structures | |
struct | varjo_StreamConfig |
Data stream configuration. More... | |
struct | varjo_CameraIntrinsics |
Camera intrinsics parameter for undistorting a distorted camera frame. More... | |
struct | varjo_BufferMetadata |
Buffer for data streams. More... | |
struct | varjo_WBNormalizationData |
White balance normalization data for color matching VR content with camera image. More... | |
struct | varjo_DistortedColorFrameMetadata |
Metadata for distorted color stream. More... | |
struct | varjo_EnvironmentCubemapFrameMetadata |
Metadata for environment cubemap stream. More... | |
union | varjo_StreamFrameMetadata |
Wrapper union for different types of streams. More... | |
struct | varjo_StreamFrame |
A single frame that will arrive to FrameListener callback after the user has subscribed to a stream. More... | |
Typedefs | |
typedef uint64_t | varjo_ChannelFlag |
Bitfield for different data stream channels. More... | |
typedef int64_t | varjo_ChannelIndex |
Values for indexing buffers and settings of data streams. More... | |
typedef int64_t | varjo_IntrinsicsModel |
Camera intrinsics model type. More... | |
typedef int64_t | varjo_BufferType |
Memory buffer type. More... | |
typedef uint64_t | varjo_DataFlag |
Frame data flag buffer type. More... | |
typedef int64_t | varjo_StreamType |
Data stream types. More... | |
typedef int64_t | varjo_StreamId |
Stream ID to identify a data stream configuration. More... | |
typedef int64_t | varjo_BufferId |
Buffer ID to lock and use a data stream buffer. More... | |
typedef void() | varjo_FrameListener(const struct varjo_StreamFrame *frame, struct varjo_Session *session, void *userData) |
Camera frame stream callback function. More... | |
Variables | |
static const varjo_ChannelFlag | varjo_ChannelFlag_None = 0 |
Disables data buffers and only provides metadata. More... | |
static const varjo_ChannelFlag | varjo_ChannelFlag_First = 1 << 0 |
First channel. More... | |
static const varjo_ChannelFlag | varjo_ChannelFlag_Second = 1 << 1 |
Second channel. More... | |
static const varjo_ChannelFlag | varjo_ChannelFlag_Left = 1 << 0 |
Helper aliases and aggregates for varjo_ChannelFlag. More... | |
static const varjo_ChannelFlag | varjo_ChannelFlag_Right = 1 << 1 |
Right camera channel. Alias for varjo_ChannelFlag_Second. More... | |
static const varjo_ChannelFlag | varjo_ChannelFlag_All = ~0 |
Aggregate of every available channel. More... | |
static const varjo_ChannelIndex | varjo_ChannelIndex_First = 0 |
First channel. More... | |
static const varjo_ChannelIndex | varjo_ChannelIndex_Second = 1 |
Second channel. More... | |
static const varjo_ChannelIndex | varjo_ChannelIndex_Left = 0 |
Helper aliases for varjo_ChannelIndex. More... | |
static const varjo_ChannelIndex | varjo_ChannelIndex_Right = 1 |
Right camera channel. Alias for varjo_ChannelIndex_Second. More... | |
static const varjo_IntrinsicsModel | varjo_IntrinsicsModel_Omnidir = 1 |
OpenCV compatible Omnidir calibration model. More... | |
static const varjo_BufferType | varjo_BufferType_CPU = 1 |
Data is available in a CPU memory buffer. More... | |
static const varjo_BufferType | varjo_BufferType_GPU = 2 |
Data is available in a GPU memory buffer. More... | |
static const varjo_DataFlag | varjo_DataFlag_Buffer = 1 << 0 |
static const varjo_DataFlag | varjo_DataFlag_Intrinsics = 1 << 1 |
static const varjo_DataFlag | varjo_DataFlag_Extrinsics = 1 << 2 |
static const varjo_StreamType | varjo_StreamType_DistortedColor = 1 |
Distorted (i.e. More... | |
static const varjo_StreamType | varjo_StreamType_EnvironmentCubemap = 2 |
HDR lighting estimate stream as a cubemap. More... | |
static const int64_t | varjo_InvalidId = -1 |
Invalid id for any ID type (e.g. More... | |
struct varjo_StreamConfig |
Data stream configuration.
Data Fields | ||
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varjo_BufferType | bufferType | Buffer type: CPU or GPU memory buffer. |
varjo_ChannelFlag | channelFlags | Bitfield of provided camera channels. |
varjo_TextureFormat | format | Texture format. |
int32_t | frameRate | Frame rate in frames per second. |
int32_t | height | Texture height;. |
int32_t | rowStride | Buffer row stride in bytes. |
varjo_StreamId | streamId | Id. |
struct varjo_Matrix | streamTransform | Transform from HMD pose center to stream origin in view coordinates. |
varjo_StreamType | streamType | Stream type. |
int32_t | width | Texture width. |
struct varjo_CameraIntrinsics |
Camera intrinsics parameter for undistorting a distorted camera frame.
Data Fields | ||
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double | distortionCoefficients[6] | Intrinsics model coefficients. For omnidir: 2 radial, skew, xi, 2 tangential. |
double | focalLengthX | Camera focal length X. |
double | focalLengthY | Camera focal length Y. |
varjo_IntrinsicsModel | model | Intrisics calibration model. |
double | principalPointX | Camera principal point X. |
double | principalPointY | Camera principal point Y. |
struct varjo_BufferMetadata |
Buffer for data streams.
Data Fields | ||
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int32_t | byteSize | Buffer size in bytes. |
varjo_TextureFormat | format | Texture format. |
int32_t | height | Image height. |
int32_t | rowStride | Buffer row stride in bytes. |
varjo_BufferType | type | CPU or GPU. |
int32_t | width | Image width. |
struct varjo_WBNormalizationData |
White balance normalization data for color matching VR content with camera image.
It is assumed that VR content is rendered as if it uses a fixed 6500K white balance. Color conversion to camera white balance color temperature is done with the following formula:
finalColor = saturate(color * invCCM * diag(whiteBalanceColorGains)) * ccm
where saturate(x) means clamping out-of-bounds values to [0, 2^B-1] range assuming B-bit image and diag(x) is a diagonal matrix with x values on the diagonal.
Data Fields | ||
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struct varjo_Matrix3x3 | ccm | CCM for VST color temperature. |
struct varjo_Matrix3x3 | invCCM | Inverse CCM for 6500K color temperature. |
double | whiteBalanceColorGains[3] | White balance RGB gains to convert from 6500K to VST color temperature. |
struct varjo_DistortedColorFrameMetadata |
Metadata for distorted color stream.
Data Fields | ||
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double | cameraCalibrationConstant | The luminance (in cd/m^2) which saturates a pixel is equal to 2^ev * cameraCalibrationConstant. |
double | ev | EV (exposure value) at ISO100. |
double | exposureTime | Exposure time in seconds. |
varjo_Nanoseconds | timestamp | Timestamp at the middle of frame exposure. |
struct varjo_WBNormalizationData | wbNormalizationData | White balance normalization data. |
double | whiteBalanceTemperature | Camera white balance color temperature in Kelvin degrees. |
struct varjo_EnvironmentCubemapFrameMetadata |
Metadata for environment cubemap stream.
Please refer to varjo_DistortedColorFrameMetadata documentation on how to access the buffer.
Data Fields | ||
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varjo_Nanoseconds | timestamp | Timestamp when the cubemap was last updated. |
union varjo_StreamFrameMetadata |
Wrapper union for different types of streams.
Data Fields | ||
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struct varjo_DistortedColorFrameMetadata | distortedColor | |
struct varjo_EnvironmentCubemapFrameMetadata | environmentCubemap | |
int64_t | reserved[64] |
struct varjo_StreamFrame |
A single frame that will arrive to FrameListener callback after the user has subscribed to a stream.
Data Fields | ||
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varjo_ChannelFlag | channels | Channels that this frame contains. |
varjo_DataFlag | dataFlags | Data that this frame contains. |
int64_t | frameNumber | Monotonically increasing frame number. |
struct varjo_Matrix | hmdPose | HMD world pose. Invert the pose, if you need the HMD center view matrix. |
varjo_StreamId | id | Id of the stream. |
union varjo_StreamFrameMetadata | metadata | Frame data. Use 'type' to determine which element to access. |
varjo_StreamType | type | Type of the stream. |
typedef int64_t varjo_BufferId |
Buffer ID to lock and use a data stream buffer.
typedef int64_t varjo_BufferType |
Memory buffer type.
typedef uint64_t varjo_ChannelFlag |
Bitfield for different data stream channels.
typedef int64_t varjo_ChannelIndex |
Values for indexing buffers and settings of data streams.
typedef uint64_t varjo_DataFlag |
Frame data flag buffer type.
typedef void() varjo_FrameListener(const struct varjo_StreamFrame *frame, struct varjo_Session *session, void *userData) |
Camera frame stream callback function.
frame | Incoming frame. |
session | Varjo session pointer for this callback. |
userData | User controlled pointer that can be supplied when subscribing to a data stream. |
typedef int64_t varjo_IntrinsicsModel |
Camera intrinsics model type.
typedef int64_t varjo_StreamId |
Stream ID to identify a data stream configuration.
typedef int64_t varjo_StreamType |
Data stream types.
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Data is available in a CPU memory buffer.
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Data is available in a GPU memory buffer.
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Aggregate of every available channel.
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First channel.
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Helper aliases and aggregates for varjo_ChannelFlag.
Left camera channel. Alias for varjo_ChannelFlag_First.
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Disables data buffers and only provides metadata.
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Right camera channel. Alias for varjo_ChannelFlag_Second.
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Second channel.
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First channel.
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Helper aliases for varjo_ChannelIndex.
Left camera channel. Alias for varjo_ChannelIndex_First.
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Right camera channel. Alias for varjo_ChannelIndex_Second.
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Second channel.
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OpenCV compatible Omnidir calibration model.
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Invalid id for any ID type (e.g.
StreamId, BufferId).
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Distorted (i.e.
uncorrected) color data stream from visible light RGB camera.
Color data frames contain the following additional data for each channel:
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HDR lighting estimate stream as a cubemap.
Values are linear, RGB=(1, 1, 1) corresponds to a luminance of 100 cd/m^2. Alpha channel indicates cubemap coverage.
Contains a single frame with the following additional data:
Cubemap layout:
CPU buffer contains the faces packed into a single column: