sunau.h

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#ifndef _SSTVENC_SUNAU_H
#define _SSTVENC_SUNAU_H
 
/*
 * © Stuart Longland VK4MSL
 * SPDX-License-Identifier: MIT
 */
 
#include <errno.h>
#include <stdarg.h>
#include <stddef.h>
#include <stdint.h>
#include <stdio.h>
 
#define SSTVENC_SUNAU_FMT_S8  (0x02u) 
#define SSTVENC_SUNAU_FMT_S16 (0x03u) 
#define SSTVENC_SUNAU_FMT_S32 (0x05u) 
#define SSTVENC_SUNAU_FMT_F32 (0x06u) 
#define SSTVENC_SUNAU_FMT_F64 (0x07u) 
struct sstvenc_sunau {
        FILE*    fh;
        uint32_t written_sz;
        uint32_t sample_rate;
        uint16_t state;
        uint8_t  encoding;
        uint8_t  channels;
};
 
int sstvenc_sunau_check(uint32_t sample_rate, uint8_t encoding,
                        uint8_t channels);
 
int sstvenc_sunau_enc_init_fh(struct sstvenc_sunau* const enc, FILE* fh,
                              uint32_t sample_rate, uint8_t encoding,
                              uint8_t channels);
 
int sstvenc_sunau_enc_init(struct sstvenc_sunau* const enc, const char* path,
                           uint32_t sample_rate, uint8_t encoding,
                           uint8_t channels);
 
int sstvenc_sunau_enc_write(struct sstvenc_sunau* const enc, size_t n_samples,
                            const double* samples);
 
int sstvenc_sunau_enc_close(struct sstvenc_sunau* const enc);
 
int sstvenc_sunau_dec_init_fh(struct sstvenc_sunau* const dec, FILE* fh);
 
int sstvenc_sunau_dec_init(struct sstvenc_sunau* const dec, const char* path);
 
int sstvenc_sunau_dec_read(struct sstvenc_sunau* const enc,
                           size_t* const n_samples, double* samples);
 
int sstvenc_sunau_dec_close(struct sstvenc_sunau* const dec);
 
#endif