From 60933d98c629ee96cb09bbaafe4be7cfa50358ed Mon Sep 17 00:00:00 2001 From: James Buren Date: Thu, 5 Aug 2021 15:57:07 +0000 Subject: inflate: import initial module for deflate decompression This will eventually be used by the ZIP module and other things that support DEFLATE based streams. Change-Id: I4acc9561eb56c9c368d1defab9c14e0454d105e1 --- firmware/include/inflate.h | 46 ++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 46 insertions(+) create mode 100644 firmware/include/inflate.h (limited to 'firmware/include/inflate.h') diff --git a/firmware/include/inflate.h b/firmware/include/inflate.h new file mode 100644 index 0000000000..b0685e8fbb --- /dev/null +++ b/firmware/include/inflate.h @@ -0,0 +1,46 @@ +/*************************************************************************** + * __________ __ ___. + * Open \______ \ ____ ____ | | _\_ |__ _______ ___ + * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ / + * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < < + * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \ + * \/ \/ \/ \/ \/ + * $Id$ + * + * Copyright (C) 2021 by James Buren (libflate adaptations for RockBox) + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version 2 + * of the License, or (at your option) any later version. + * + * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY + * KIND, either express or implied. + * + ****************************************************************************/ + +#ifndef _INFLATE_H_ +#define _INFLATE_H_ + +#include + +enum { + INFLATE_RAW, + INFLATE_ZLIB, + INFLATE_GZIP, +}; + +struct inflate; + +typedef uint32_t inflate_reader(void* block, uint32_t block_size, void* ctx); +typedef uint32_t inflate_writer(const void* block, uint32_t block_size, void* ctx); + +extern const uint32_t inflate_size; +extern const uint32_t inflate_align; + +// 'it' must be allocated by the caller. it must be at least 'inflate_size' bytes +// and aligned at 'inflate_align' bytes. 'st' is the type of stream to decompress; +// see above enum for possible options. +int inflate(struct inflate* it, int st, inflate_reader read, void* rctx, inflate_writer write, void* wctx); + +#endif -- cgit v1.2.3