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/*
* Copyright (C) 2021 Linux Studio Plugins Project <https://lsp-plug.in/>
* (C) 2021 Vladimir Sadovnikov <sadko4u@gmail.com>
*
* This file is part of lsp-runtime-lib
* Created on: 16 мар. 2021 г.
*
* lsp-runtime-lib is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* any later version.
*
* lsp-runtime-lib is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with lsp-runtime-lib. If not, see <https://www.gnu.org/licenses/>.
*/
#ifndef LSP_PLUG_IN_RESOURCE_DECOMPRESSOR_H_
#define LSP_PLUG_IN_RESOURCE_DECOMPRESSOR_H_
#include <lsp-plug.in/runtime/version.h>
#include <lsp-plug.in/io/IInStream.h>
#include <lsp-plug.in/io/InBitStream.h>
#include <lsp-plug.in/resource/buffer.h>
namespace lsp
{
namespace resource
{
class Decompressor: public io::IInStream
{
private:
Decompressor &operator = (const Decompressor &);
Decompressor(const Decompressor &);
protected:
typedef struct cbuf_t
{
uint8_t *data; // Data
size_t off; // Offset
size_t size; // Size of buffer
size_t cap; // Capacity of buffer
size_t rep; // Number of repeats
} cbuf_t;
protected:
io::InBitStream sIn; // Input stream
dbuffer_t sBuffer; // Buffer for caching
cbuf_t sReplay; // Replay buffer
size_t nOffset; // Offset
size_t nLast; // Last byte
protected:
status_t read_uint(size_t *out, size_t initial, size_t stepping);
size_t get_buf(uint8_t *dst, size_t count);
ssize_t get_bufc();
status_t set_buf(size_t off, size_t count, size_t rep);
status_t set_bufc(uint8_t c, size_t rep);
status_t fill_buf();
status_t do_close();
public:
explicit Decompressor();
virtual ~Decompressor();
public:
status_t init(const void *data, size_t last, size_t buf_sz);
public:
virtual ssize_t read_byte();
virtual ssize_t read(void *dst, size_t count);
virtual status_t close();
};
}
}
#endif /* LSP_PLUG_IN_RESOURCE_DECOMPRESSOR_H_ */
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