Add Sony LZ4 compressed SIN image support #47
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Sony device firmware images in SIN format are basically the same sparse images, augmented with a custom chunk type, 0xCAC5 [1]. Such chunk contains a raw LZ4-compressed block. See few more notes in the code comment. Implement this vendor-specific chunk type support to be capable to convert SIN-images into RAW-images in a regular way. Use liblz4 [2] to decompress the chunk data. Creating SIN-images with LZ4-compression is not yet supported. 1. https://xdaforums.com/t/tool-unsin-sin-v3-v4-v5-unpacker-v2-0.3128106/post-75983550 2. https://github.com/lz4/lz4 Signed-off-by: Sergey Ryazanov <[email protected]>
Mention SIN images support in a new section 'Vendor extensions' and extend the dependencies list with liblz4 for both Windows and Linux platforms. Signed-off-by: Sergey Ryazanov <[email protected]>
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Troubleshooting a firmware issue I've noticed that Sony images cannot be handled by
simg2imgutility:The issue is that Sony augmented sparse format with a new chunk type - 0xCAC5 carrying LZ4 compressed data [1]. Proposed solution implements such chunk support using liblz4. With these changes applied I can convert all the available images from sparse to raw: