sstv.h

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#ifndef _SSTVENC_SSTV_H
#define _SSTVENC_SSTV_H
 
/*
 * © Stuart Longland VK4MSL
 * SPDX-License-Identifier: MIT
 */
 
#include <assert.h>
#include <libsstvenc/sstvmode.h>
#include <stdint.h>
#include <string.h>
 
#define SSTVENC_ENCODER_PHASE_INIT     (0)
 
#define SSTVENC_ENCODER_PHASE_VIS      (1)
 
#define SSTVENC_ENCODER_PHASE_INITSEQ  (2)
 
#define SSTVENC_ENCODER_PHASE_SCAN     (3)
 
#define SSTVENC_ENCODER_PHASE_FINALSEQ (4)
 
#define SSTVENC_ENCODER_PHASE_FSK      (5)
 
#define SSTVENC_ENCODER_PHASE_DONE     (6)
 
/* Forward declaration */
struct sstvenc_encoder;
 
typedef void sstvenc_encoder_callback(struct sstvenc_encoder* const enc);
 
struct sstvenc_encoder {
        const struct sstvenc_mode*          mode;
 
        const char*                         fsk_id;
 
        const uint8_t*                      framebuffer;
 
        const struct sstvenc_encoder_pulse* seq;
 
        sstvenc_encoder_callback*           seq_done_cb;
 
        struct sstvenc_encoder_pulse        pulse;
 
        union sstvenc_encoder_phase_data {
                struct sstvenc_encoder_phase_vis_data {
                        uint8_t bit;
                } vis;
 
                struct sstvenc_encoder_phase_scan_data {
                        uint16_t x;
 
                        uint16_t y;
 
                        uint8_t  segment;
                } scan;
 
                struct sstvenc_encoder_phase_fsk_data {
                        uint8_t segment;
 
                        uint8_t seg_sz;
 
                        uint8_t byte;
 
                        uint8_t bv;
 
                        uint8_t bit;
                } fsk;
        } vars;
 
        uint8_t phase;
};
 
void sstvenc_encoder_init(struct sstvenc_encoder* const enc,
                          const struct sstvenc_mode* mode, const char* fsk_id,
                          const uint8_t* framebuffer);
 
const struct sstvenc_encoder_pulse*
sstvenc_encoder_next_pulse(struct sstvenc_encoder* const enc);
 
#endif