System and method for enabling the fast extraction of interleaved image data

摘要

An improved system and method for deinterleaving a data unit containing chunks of two or more different data types. In an embodiment of the invention, both a device MPU and DMA hardware are used to deinterleave a data unit containing chunks of both compressed data and uncompressed data. The device MPU is used to transfer compressed data from an interleaved data buffer to a compressed data buffer, while the DMA hardware is used to transfer uncompressed data from the interleaved data buffer to a compressed data buffer. By using both the MPU and the DMA hardware, the overall efficiency of the data transfer process is improved.

主权项

1. A method comprising:
copying an uncompressed data chunk from an interleaved data unit to an uncompressed data buffer, the interleaved data unit comprising a plurality of alternating uncompressed data chunks and compressed data chunks; searching a compressed data chunk from the interleaved data unit after a predetermined data length to find a marker while the uncompressed data is being copied, the marker indicating a beginning of the next uncompressed data chunk; and copying a compressed data chunk of the interleaved data unit to a compressed memory buffer until the marker is reached.