datumaro.plugins.data_formats.arrow.mapper.media#

Classes

`ImageMapper`()
`MediaElementMapper`()
`MediaMapper`()
`PointCloudMapper`()

class datumaro.plugins.data_formats.arrow.mapper.media.MediaMapper[source]#

Bases: Mapper

classmethod forward(obj: MediaElement | None, **options) → Dict[str, Any][source]#: Convert an object to bytes.

classmethod backward(media_struct: StructScalar, idx: int, table: Table, table_path: str) → MediaElement | None[source]#: Build an object from bytes.

class datumaro.plugins.data_formats.arrow.mapper.media.MediaElementMapper[source]#

Bases: Mapper

MAGIC_PATH = '/NOT/A/REAL/PATH'#

MEDIA_TYPE = 1#

classmethod forward(obj: MediaElement) → Dict[str, Any][source]#: Convert an object to bytes.

classmethod backward(media_dict: Dict[str, Any], idx: int, table: Table, table_path: str) → MediaElement[source]#: Build an object from bytes.

class datumaro.plugins.data_formats.arrow.mapper.media.ImageMapper[source]#

Bases: MediaElementMapper

MEDIA_TYPE = 2#

AVAILABLE_SCHEMES = ('AS-IS', 'PNG', 'TIFF', 'JPEG/95', 'JPEG/75', 'NONE')#

classmethod encode(obj: Image, scheme: str = 'PNG') → bytes | None[source]#

classmethod decode(path: str | None = None, data: bytes | None = None) → ndarray | None[source]#

classmethod forward(obj: Image, encoder: str | Callable[[Image], bytes] = 'PNG') → Dict[str, Any][source]#: Convert an object to bytes.

classmethod backward(media_struct: StructScalar, idx: int, table: Table, table_path: str) → Image[source]#: Build an object from bytes.

classmethod backward_extra_image(image_struct: StructScalar, idx: int, table: Table, extra_image_idx: int) → Image[source]#

class datumaro.plugins.data_formats.arrow.mapper.media.PointCloudMapper[source]#

Bases: MediaElementMapper

MEDIA_TYPE = 6#

B64_PREFIX = '//B64_ENCODED//'#

classmethod forward(obj: PointCloud, encoder: str | Callable[[PointCloud], bytes] = 'PNG') → Dict[str, Any][source]#: Convert an object to bytes.

classmethod backward(media_struct: StructScalar, idx: int, table: Table, table_path: str) → PointCloud[source]#: Build an object from bytes.