827d99dde3
* lib: add heatshrink compress library * canvas: new icons format * scripts: add icons compression to assets generation script * assets: update assets * furi-hal: introduce furi-hal-compress * canvas: rework icon drawing with furi-hal-compress * lib: rework heatshrink lib for dynamic buffer allocation API * furi-hal-compress: add encode and decode API * furi-hal-compress: working decode * furi-hal-compress: support f6 target * scripts: format sources * furi-hal-compress: fix incorrect encoder reset * furi-hal: add compress initialization to f6 target Co-authored-by: あく <alleteam@gmail.com>
101 lines
3.8 KiB
C
101 lines
3.8 KiB
C
#ifndef HEATSHRINK_DECODER_H
|
|
#define HEATSHRINK_DECODER_H
|
|
|
|
#include <stdint.h>
|
|
#include <stddef.h>
|
|
#include "heatshrink_common.h"
|
|
#include "heatshrink_config.h"
|
|
|
|
typedef enum {
|
|
HSDR_SINK_OK, /* data sunk, ready to poll */
|
|
HSDR_SINK_FULL, /* out of space in internal buffer */
|
|
HSDR_SINK_ERROR_NULL=-1, /* NULL argument */
|
|
} HSD_sink_res;
|
|
|
|
typedef enum {
|
|
HSDR_POLL_EMPTY, /* input exhausted */
|
|
HSDR_POLL_MORE, /* more data remaining, call again w/ fresh output buffer */
|
|
HSDR_POLL_ERROR_NULL=-1, /* NULL arguments */
|
|
HSDR_POLL_ERROR_UNKNOWN=-2,
|
|
} HSD_poll_res;
|
|
|
|
typedef enum {
|
|
HSDR_FINISH_DONE, /* output is done */
|
|
HSDR_FINISH_MORE, /* more output remains */
|
|
HSDR_FINISH_ERROR_NULL=-1, /* NULL arguments */
|
|
} HSD_finish_res;
|
|
|
|
#if HEATSHRINK_DYNAMIC_ALLOC
|
|
#define HEATSHRINK_DECODER_INPUT_BUFFER_SIZE(BUF) \
|
|
((BUF)->input_buffer_size)
|
|
#define HEATSHRINK_DECODER_WINDOW_BITS(BUF) \
|
|
((BUF)->window_sz2)
|
|
#define HEATSHRINK_DECODER_LOOKAHEAD_BITS(BUF) \
|
|
((BUF)->lookahead_sz2)
|
|
#else
|
|
#define HEATSHRINK_DECODER_INPUT_BUFFER_SIZE(_) \
|
|
HEATSHRINK_STATIC_INPUT_BUFFER_SIZE
|
|
#define HEATSHRINK_DECODER_WINDOW_BITS(_) \
|
|
(HEATSHRINK_STATIC_WINDOW_BITS)
|
|
#define HEATSHRINK_DECODER_LOOKAHEAD_BITS(BUF) \
|
|
(HEATSHRINK_STATIC_LOOKAHEAD_BITS)
|
|
#endif
|
|
|
|
typedef struct {
|
|
uint16_t input_size; /* bytes in input buffer */
|
|
uint16_t input_index; /* offset to next unprocessed input byte */
|
|
uint16_t output_count; /* how many bytes to output */
|
|
uint16_t output_index; /* index for bytes to output */
|
|
uint16_t head_index; /* head of window buffer */
|
|
uint8_t state; /* current state machine node */
|
|
uint8_t current_byte; /* current byte of input */
|
|
uint8_t bit_index; /* current bit index */
|
|
|
|
#if HEATSHRINK_DYNAMIC_ALLOC
|
|
/* Fields that are only used if dynamically allocated. */
|
|
uint8_t window_sz2; /* window buffer bits */
|
|
uint8_t lookahead_sz2; /* lookahead bits */
|
|
uint16_t input_buffer_size; /* input buffer size */
|
|
|
|
/* Input buffer, then expansion window buffer */
|
|
uint8_t* buffers;
|
|
#else
|
|
/* Input buffer, then expansion window buffer */
|
|
uint8_t buffers[(1 << HEATSHRINK_DECODER_WINDOW_BITS(_))
|
|
+ HEATSHRINK_DECODER_INPUT_BUFFER_SIZE(_)];
|
|
#endif
|
|
} heatshrink_decoder;
|
|
|
|
#if HEATSHRINK_DYNAMIC_ALLOC
|
|
/* Allocate a decoder with an input buffer of INPUT_BUFFER_SIZE bytes,
|
|
* an expansion buffer size of 2^WINDOW_SZ2, and a lookahead
|
|
* size of 2^lookahead_sz2. (The window buffer and lookahead sizes
|
|
* must match the settings used when the data was compressed.)
|
|
* Returns NULL on error. */
|
|
heatshrink_decoder *heatshrink_decoder_alloc(uint8_t* buffer, uint16_t input_buffer_size,
|
|
uint8_t expansion_buffer_sz2, uint8_t lookahead_sz2);
|
|
|
|
/* Free a decoder. */
|
|
void heatshrink_decoder_free(heatshrink_decoder *hsd);
|
|
#endif
|
|
|
|
/* Reset a decoder. */
|
|
void heatshrink_decoder_reset(heatshrink_decoder *hsd);
|
|
|
|
/* Sink at most SIZE bytes from IN_BUF into the decoder. *INPUT_SIZE is set to
|
|
* indicate how many bytes were actually sunk (in case a buffer was filled). */
|
|
HSD_sink_res heatshrink_decoder_sink(heatshrink_decoder *hsd,
|
|
uint8_t *in_buf, size_t size, size_t *input_size);
|
|
|
|
/* Poll for output from the decoder, copying at most OUT_BUF_SIZE bytes into
|
|
* OUT_BUF (setting *OUTPUT_SIZE to the actual amount copied). */
|
|
HSD_poll_res heatshrink_decoder_poll(heatshrink_decoder *hsd,
|
|
uint8_t *out_buf, size_t out_buf_size, size_t *output_size);
|
|
|
|
/* Notify the dencoder that the input stream is finished.
|
|
* If the return value is HSDR_FINISH_MORE, there is still more output, so
|
|
* call heatshrink_decoder_poll and repeat. */
|
|
HSD_finish_res heatshrink_decoder_finish(heatshrink_decoder *hsd);
|
|
|
|
#endif
|