o 2wi @sddlZddlmZddlmZmZmZmZddlm Z m Z ddl m Z m Z ddlmZmZmZddlmZddlmZee e e e fZGd d d Zd ejd eeeeeeeefddffd dZdejd ejd eeeeffddZdS)N)Path) GeneratorOptionalTupleUnion)Features Recording)Array TemporalArray)decode_json_linedeserialize_item open_best)fill_shar_placeholder)Pathlikec@sFeZdZdZdeddfddZdeeee e fddffddZ dS) TarIteratora TarIterator is a convenience class for reading arrays/audio stored in Lhotse Shar tar files. It is specific to Lhotse Shar format and expects the tar file to have the following structure: * each file is stored in a separate tar member * the file name is the key of the array * every array has two corresponding files: * the metadata: the file extension is ``.json`` and the file contains a Lhotse manifest (Recording, Array, TemporalArray, Features) for the data item. * the data: the file extension is the format of the array, and the file contents are the serialized array (possibly compressed). * the data file can be empty in case some cut did not contain that field. In that case, the data file has extension ``.nodata`` and the manifest file has extension ``.nometa``. * these files are saved one after another, the data is first, and the metadata follows. Iterating over TarReader yields tuples of ``(Optional[manifest], filename)`` where ``manifest`` is a Lhotse manifest with binary data attached to it, and ``filename`` is the name of the data file inside tar archive. sourcereturnNcCs ||_dS)N)r)selfrrT/home/ubuntu/sommelier/.venv/lib/python3.10/site-packages/lhotse/shar/readers/tar.py__init__%s zTarIterator.__init__ccstjt|jdddd/}t|D]!\\}}\}}|dur.tt|d}t|||d||fVqWddS1s?wYdS)Nrb)modezr|*)fileobjrzutf-8)manifestdatatarpath) tarfileopenr riterate_tarfile_pairwiser r decoder)rtarr data_pathmeta meta_pathrrr__iter__(s "zTarIterator.__iter__) __name__ __module__ __qualname____doc__rrrrrManifestrr%rrrrrs rtar_filerccshg}|D]}t|dkrt|Vg}|t||qt|dkr(t|Vt|dkr2tddS)Nz`Uneven number of files in the tarfile (expected to iterate pairs of binary data + JSON metadata.)lentupleappend parse_tarinfo RuntimeError)r+resulttarinforrrr3s     rr4cCs<t|j}|jdks|jdkrd|fS||}||fS)z_ Parse a tarinfo object and return the data it points to as well as the internal path. z.nodataz.nometaN)rpathsuffix extractfileread)r4r+r5rrrrr1Fs r1)rpathlibrtypingrrrrlhotserr lhotse.arrayr r lhotse.serializationr r r lhotse.shar.utilsr lhotse.utilsrr*rTarFilebytesrTarInfor1rrrrs,   %