sstvmode.c

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/*
 * © Stuart Longland VK4MSL
 * SPDX-License-Identifier: MIT
 */
 
#include <libsstvenc/sstvfreq.h>
#include <libsstvenc/sstvmode.h>
 
/* SSTV mode specifications -- Robot B/W modes */
const static struct sstvenc_encoder_pulse sstvenc_sstv_robotbw_fp[] = {
    {.frequency = SSTVENC_FREQ_SYNC, .duration_ns = 7000000},
    {.frequency = 0, .duration_ns = 0},
};
 
/* SSTV mode specifications -- Robot colour modes */
const static struct sstvenc_encoder_pulse sstvenc_sstv_robot36_fp[] = {
    {.frequency = SSTVENC_FREQ_SYNC, .duration_ns = 9000000},
    {.frequency = SSTVENC_FREQ_BLACK, .duration_ns = 3000000},
    {.frequency = 0, .duration_ns = 0},
};
 
const static struct sstvenc_encoder_pulse sstvenc_sstv_robot36_gap[] = {
    {.frequency = SSTVENC_FREQ_BLACK, .duration_ns = 4500000},
    {.frequency = SSTVENC_FREQ_VIS_START, .duration_ns = 1500000},
    {.frequency = 0, .duration_ns = 0},
};
 
const static struct sstvenc_encoder_pulse sstvenc_sstv_robot72_fp[] = {
    {.frequency = SSTVENC_FREQ_SYNC, .duration_ns = 9000000},
    {.frequency = SSTVENC_FREQ_BLACK, .duration_ns = 3000000},
    {.frequency = 0, .duration_ns = 0},
};
 
const static struct sstvenc_encoder_pulse sstvenc_sstv_robot72_gap01[] = {
    {.frequency = SSTVENC_FREQ_BLACK, .duration_ns = 4500000},
    {.frequency = SSTVENC_FREQ_VIS_START, .duration_ns = 1500000},
    {.frequency = 0, .duration_ns = 0},
};
 
const static struct sstvenc_encoder_pulse sstvenc_sstv_robot72_gap12[] = {
    {.frequency = SSTVENC_FREQ_WHITE, .duration_ns = 4500000},
    {.frequency = SSTVENC_FREQ_VIS_START, .duration_ns = 1500000},
    {.frequency = 0, .duration_ns = 0},
};
 
/* SSTV mode specifications -- Scottie modes */
const static struct sstvenc_encoder_pulse sstvenc_sstv_scottie_fp[] = {
    {.frequency = SSTVENC_FREQ_BLACK, .duration_ns = 1500000},
    {.frequency = 0, .duration_ns = 0},
};
 
const static struct sstvenc_encoder_pulse sstvenc_sstv_scottie_sep01[] = {
    {.frequency = SSTVENC_FREQ_BLACK, .duration_ns = 3000000},
    {.frequency = 0, .duration_ns = 0},
};
 
const static struct sstvenc_encoder_pulse sstvenc_sstv_scottie_sep12[] = {
    {.frequency = SSTVENC_FREQ_BLACK, .duration_ns = 1500000},
    {.frequency = SSTVENC_FREQ_SYNC, .duration_ns = 9000000},
    {.frequency = SSTVENC_FREQ_BLACK, .duration_ns = 1500000},
    {.frequency = 0, .duration_ns = 0},
};
 
const static struct sstvenc_encoder_pulse sstvenc_sstv_scottie_bp[] = {
    {.frequency = SSTVENC_FREQ_BLACK, .duration_ns = 1500000},
    {.frequency = 0, .duration_ns = 0},
};
 
/* SSTV mode specifications -- Martin modes */
const static struct sstvenc_encoder_pulse sstvenc_sstv_martin_fp[] = {
    {.frequency = SSTVENC_FREQ_SYNC, .duration_ns = 4862000},
    {.frequency = SSTVENC_FREQ_BLACK, .duration_ns = 572000},
    {.frequency = 0, .duration_ns = 0},
};
 
const static struct sstvenc_encoder_pulse sstvenc_sstv_martin_sep[] = {
    {.frequency = SSTVENC_FREQ_BLACK, .duration_ns = 572000},
    {.frequency = 0, .duration_ns = 0},
};
 
/* SSTV mode specifications -- Pasokon modes */
 
#define SSTVENC_PASOKON_P3_TIMEUNIT (1000000000.0 / 4800.0)
#define SSTVENC_PASOKON_P5_TIMEUNIT (1000000000.0 / 3200.0)
#define SSTVENC_PASOKON_P7_TIMEUNIT (1000000000.0 / 2400.0)
 
#define SSTVENC_PASOKON_SYNC(unit)  (25 * unit)
#define SSTVENC_PASOKON_GAP(unit)   (5 * unit)
#define SSTVENC_PASOKON_SCAN(unit)  (640 * unit)
 
const static struct sstvenc_encoder_pulse sstvenc_sstv_pasokon_p3_fp[] = {
    {.frequency   = SSTVENC_FREQ_SYNC,
     .duration_ns = SSTVENC_PASOKON_SYNC(SSTVENC_PASOKON_P3_TIMEUNIT)},
    {.frequency   = SSTVENC_FREQ_BLACK,
     .duration_ns = SSTVENC_PASOKON_GAP(SSTVENC_PASOKON_P3_TIMEUNIT)},
    {.frequency = 0, .duration_ns = 0},
};
 
const static struct sstvenc_encoder_pulse sstvenc_sstv_pasokon_p3_sep[] = {
    {.frequency   = SSTVENC_FREQ_BLACK,
     .duration_ns = SSTVENC_PASOKON_GAP(SSTVENC_PASOKON_P3_TIMEUNIT)},
    {.frequency = 0, .duration_ns = 0},
};
 
const static struct sstvenc_encoder_pulse sstvenc_sstv_pasokon_p5_fp[] = {
    {.frequency   = SSTVENC_FREQ_SYNC,
     .duration_ns = SSTVENC_PASOKON_SYNC(SSTVENC_PASOKON_P5_TIMEUNIT)},
    {.frequency   = SSTVENC_FREQ_BLACK,
     .duration_ns = SSTVENC_PASOKON_GAP(SSTVENC_PASOKON_P5_TIMEUNIT)},
    {.frequency = 0, .duration_ns = 0},
};
 
const static struct sstvenc_encoder_pulse sstvenc_sstv_pasokon_p5_sep[] = {
    {.frequency   = SSTVENC_FREQ_BLACK,
     .duration_ns = SSTVENC_PASOKON_GAP(SSTVENC_PASOKON_P5_TIMEUNIT)},
    {.frequency = 0, .duration_ns = 0},
};
 
const static struct sstvenc_encoder_pulse sstvenc_sstv_pasokon_p7_fp[] = {
    {.frequency   = SSTVENC_FREQ_SYNC,
     .duration_ns = SSTVENC_PASOKON_SYNC(SSTVENC_PASOKON_P7_TIMEUNIT)},
    {.frequency   = SSTVENC_FREQ_BLACK,
     .duration_ns = SSTVENC_PASOKON_GAP(SSTVENC_PASOKON_P7_TIMEUNIT)},
    {.frequency = 0, .duration_ns = 0},
};
 
const static struct sstvenc_encoder_pulse sstvenc_sstv_pasokon_p7_sep[] = {
    {.frequency   = SSTVENC_FREQ_BLACK,
     .duration_ns = SSTVENC_PASOKON_GAP(SSTVENC_PASOKON_P7_TIMEUNIT)},
    {.frequency = 0, .duration_ns = 0},
};
 
/* SSTV mode specifications -- PD modes */
const static struct sstvenc_encoder_pulse sstvenc_sstv_pd_fp[] = {
    {.frequency = SSTVENC_FREQ_SYNC, .duration_ns = 20000000},
    {.frequency = SSTVENC_FREQ_BLACK, .duration_ns = 2080000},
    {.frequency = 0, .duration_ns = 0},
};
 
/* SSTV mode specifications -- Wraase SC-2 modes */
const static struct sstvenc_encoder_pulse sstvenc_sstv_wraasesc2_180_fp[] = {
    {.frequency = SSTVENC_FREQ_SYNC, .duration_ns = 5522500},
    {.frequency = SSTVENC_FREQ_BLACK, .duration_ns = 500000},
    {.frequency = 0, .duration_ns = 0},
};
 
const static struct sstvenc_encoder_pulse sstvenc_sstv_wraasesc2_120_fp[] = {
    {.frequency = SSTVENC_FREQ_SYNC, .duration_ns = 5522500},
    {.frequency = SSTVENC_FREQ_BLACK, .duration_ns = 1000000},
    {.frequency = 0, .duration_ns = 0},
};
 
const static struct sstvenc_encoder_pulse sstvenc_sstv_wraasesc2_sep[] = {
    {.frequency = SSTVENC_FREQ_BLACK, .duration_ns = 500000},
    {.frequency = 0, .duration_ns = 0},
};
 
/* SSTV mode specifications -- the table */
const static struct sstvenc_mode sstvenc_sstv_modes[] = {
    /* Robot B/W modes */
    {
        .description        = "Robot 8 B/W",
        .name               = "R8BW",
        .initseq            = NULL,
        .frontporch         = sstvenc_sstv_robotbw_fp,
        .gap01              = NULL,
        .gap12              = NULL,
        .backporch          = NULL,
        .finalseq           = NULL,
        .scanline_period_ns = {59900000, 0, 0},
        .width              = 160,
        .height             = 120,
        .colour_space_order = SSTVENC_MODE_ORDER(
            SSTVENC_CSO_MODE_MONO, SSTVENC_CSO_CH_Y, SSTVENC_CSO_CH_NONE,
            SSTVENC_CSO_CH_NONE, SSTVENC_CSO_CH_NONE),
        .vis_code = 0x02,
    },
    {
        .description        = "Robot 12 B/W",
        .name               = "R12BW",
        .initseq            = NULL,
        .frontporch         = sstvenc_sstv_robotbw_fp,
        .gap01              = NULL,
        .gap12              = NULL,
        .backporch          = NULL,
        .finalseq           = NULL,
        .scanline_period_ns = {93000000, 0, 0},
        .width              = 160,
        .height             = 120,
        .colour_space_order = SSTVENC_MODE_ORDER(
            SSTVENC_CSO_MODE_MONO, SSTVENC_CSO_CH_Y, SSTVENC_CSO_CH_NONE,
            SSTVENC_CSO_CH_NONE, SSTVENC_CSO_CH_NONE),
        .vis_code = 0x86,
    },
    {
        .description        = "Robot 24 B/W",
        .name               = "R24BW",
        .initseq            = NULL,
        .frontporch         = sstvenc_sstv_robotbw_fp,
        .gap01              = NULL,
        .gap12              = NULL,
        .backporch          = NULL,
        .finalseq           = NULL,
        .scanline_period_ns = {93000000, 0, 0},
        .width              = 320,
        .height             = 240,
        .colour_space_order = SSTVENC_MODE_ORDER(
            SSTVENC_CSO_MODE_MONO, SSTVENC_CSO_CH_Y, SSTVENC_CSO_CH_NONE,
            SSTVENC_CSO_CH_NONE, SSTVENC_CSO_CH_NONE),
        .vis_code = 0x0a,
    },
    /* Robot colour modes */
    {
        .description        = "Robot 36",
        .name               = "R36",
        .initseq            = NULL,
        .frontporch         = sstvenc_sstv_robot36_fp,
        .gap01              = sstvenc_sstv_robot36_gap,
        .gap12              = sstvenc_sstv_robot36_fp,
        .gap23              = sstvenc_sstv_robot36_gap,
        .backporch          = NULL,
        .finalseq           = NULL,
        .scanline_period_ns = {88000000, 44000000, 88000000, 44000000},
        .width              = 320,
        .height             = 240,
        .colour_space_order = SSTVENC_MODE_ORDER(
            SSTVENC_CSO_MODE_YUV2, SSTVENC_CSO_CH_Y, SSTVENC_CSO_CH_U,
            SSTVENC_CSO_CH_Y2, SSTVENC_CSO_CH_V),
        .vis_code = 0x08,
    },
    {
        .description        = "Robot 72",
        .name               = "R72",
        .initseq            = NULL,
        .frontporch         = sstvenc_sstv_robot72_fp,
        .gap01              = sstvenc_sstv_robot72_gap01,
        .gap12              = sstvenc_sstv_robot72_gap12,
        .gap23              = NULL,
        .backporch          = NULL,
        .finalseq           = NULL,
        .scanline_period_ns = {138000000, 69000000, 69000000},
        .width              = 320,
        .height             = 240,
        .colour_space_order = SSTVENC_MODE_ORDER(
            SSTVENC_CSO_MODE_YUV, SSTVENC_CSO_CH_Y, SSTVENC_CSO_CH_U,
            SSTVENC_CSO_CH_V, SSTVENC_CSO_CH_NONE),
        .vis_code = 0x0c,
    },
    /* Scottie modes */
    {
        .description        = "Scottie S1",
        .name               = "S1",
        .initseq            = NULL,
        .frontporch         = sstvenc_sstv_scottie_fp,
        .gap01              = sstvenc_sstv_scottie_sep01,
        .gap12              = sstvenc_sstv_scottie_sep12,
        .backporch          = sstvenc_sstv_scottie_bp,
        .finalseq           = NULL,
        .scanline_period_ns = {136740000, 136740000, 136740000},
        .width              = 320,
        .height             = 256,
        .colour_space_order = SSTVENC_MODE_ORDER(
            SSTVENC_CSO_MODE_RGB, SSTVENC_CSO_CH_G, SSTVENC_CSO_CH_B,
            SSTVENC_CSO_CH_R, SSTVENC_CSO_CH_NONE),
        .vis_code = 0x3c,
    },
    {
        .description        = "Scottie S2",
        .name               = "S2",
        .initseq            = NULL,
        .frontporch         = sstvenc_sstv_scottie_fp,
        .gap01              = sstvenc_sstv_scottie_sep01,
        .gap12              = sstvenc_sstv_scottie_sep12,
        .backporch          = sstvenc_sstv_scottie_bp,
        .finalseq           = NULL,
        .scanline_period_ns = {86564000, 86564000, 86564000},
        .width              = 320,
        .height             = 256,
        .colour_space_order = SSTVENC_MODE_ORDER(
            SSTVENC_CSO_MODE_RGB, SSTVENC_CSO_CH_G, SSTVENC_CSO_CH_B,
            SSTVENC_CSO_CH_R, SSTVENC_CSO_CH_NONE),
        .vis_code = 0x38,
    },
    {
        .description        = "Scottie DX",
        .name               = "SDX",
        .initseq            = NULL,
        .frontporch         = sstvenc_sstv_scottie_fp,
        .gap01              = sstvenc_sstv_scottie_sep01,
        .gap12              = sstvenc_sstv_scottie_sep12,
        .backporch          = sstvenc_sstv_scottie_bp,
        .finalseq           = NULL,
        .scanline_period_ns = {344100000, 344100000, 344100000},
        .width              = 320,
        .height             = 256,
        .colour_space_order = SSTVENC_MODE_ORDER(
            SSTVENC_CSO_MODE_RGB, SSTVENC_CSO_CH_G, SSTVENC_CSO_CH_B,
            SSTVENC_CSO_CH_R, SSTVENC_CSO_CH_NONE),
        .vis_code = 0x4c,
    },
    /* Martin modes */
    {
        .description        = "Martin M1",
        .name               = "M1",
        .initseq            = NULL,
        .frontporch         = sstvenc_sstv_martin_fp,
        .gap01              = sstvenc_sstv_martin_sep,
        .gap12              = sstvenc_sstv_martin_sep,
        .backporch          = sstvenc_sstv_martin_sep,
        .finalseq           = NULL,
        .scanline_period_ns = {146432000, 146432000, 146432000},
        .width              = 320,
        .height             = 256,
        .colour_space_order = SSTVENC_MODE_ORDER(
            SSTVENC_CSO_MODE_RGB, SSTVENC_CSO_CH_G, SSTVENC_CSO_CH_B,
            SSTVENC_CSO_CH_R, SSTVENC_CSO_CH_NONE),
        .vis_code = 0x2c,
    },
    {
        .description        = "Martin M2",
        .name               = "M2",
        .initseq            = NULL,
        .frontporch         = sstvenc_sstv_martin_fp,
        .gap01              = sstvenc_sstv_martin_sep,
        .gap12              = sstvenc_sstv_martin_sep,
        .backporch          = sstvenc_sstv_martin_sep,
        .finalseq           = NULL,
        .scanline_period_ns = {73216000, 73216000, 73216000},
        .width              = 320,
        .height             = 256,
        .colour_space_order = SSTVENC_MODE_ORDER(
            SSTVENC_CSO_MODE_RGB, SSTVENC_CSO_CH_G, SSTVENC_CSO_CH_B,
            SSTVENC_CSO_CH_R, SSTVENC_CSO_CH_NONE),
        .vis_code = 0x28,
    },
    /* Pasokon modes */
    {
        .description = "Pasokon P3",
        .name        = "P3",
        .initseq     = NULL,
        .frontporch  = sstvenc_sstv_pasokon_p3_fp,
        .gap01       = sstvenc_sstv_pasokon_p3_sep,
        .gap12       = sstvenc_sstv_pasokon_p3_sep,
        .backporch   = sstvenc_sstv_pasokon_p3_sep,
        .finalseq    = NULL,
        .scanline_period_ns
        = {SSTVENC_PASOKON_SCAN(SSTVENC_PASOKON_P3_TIMEUNIT),
           SSTVENC_PASOKON_SCAN(SSTVENC_PASOKON_P3_TIMEUNIT),
           SSTVENC_PASOKON_SCAN(SSTVENC_PASOKON_P3_TIMEUNIT)},
        .width              = 640,
        .height             = 496,
        .colour_space_order = SSTVENC_MODE_ORDER(
            SSTVENC_CSO_MODE_RGB, SSTVENC_CSO_CH_R, SSTVENC_CSO_CH_G,
            SSTVENC_CSO_CH_B, SSTVENC_CSO_CH_NONE),
        .vis_code = 0x71,
    },
    {
        .description = "Pasokon P5",
        .name        = "P5",
        .initseq     = NULL,
        .frontporch  = sstvenc_sstv_pasokon_p5_fp,
        .gap01       = sstvenc_sstv_pasokon_p5_sep,
        .gap12       = sstvenc_sstv_pasokon_p5_sep,
        .backporch   = sstvenc_sstv_pasokon_p5_sep,
        .finalseq    = NULL,
        .scanline_period_ns
        = {SSTVENC_PASOKON_SCAN(SSTVENC_PASOKON_P5_TIMEUNIT),
           SSTVENC_PASOKON_SCAN(SSTVENC_PASOKON_P5_TIMEUNIT),
           SSTVENC_PASOKON_SCAN(SSTVENC_PASOKON_P5_TIMEUNIT)},
        .width              = 640,
        .height             = 496,
        .colour_space_order = SSTVENC_MODE_ORDER(
            SSTVENC_CSO_MODE_RGB, SSTVENC_CSO_CH_R, SSTVENC_CSO_CH_G,
            SSTVENC_CSO_CH_B, SSTVENC_CSO_CH_NONE),
        .vis_code = 0x72,
    },
    {
        .description = "Pasokon P7",
        .name        = "P7",
        .initseq     = NULL,
        .frontporch  = sstvenc_sstv_pasokon_p7_fp,
        .gap01       = sstvenc_sstv_pasokon_p7_sep,
        .gap12       = sstvenc_sstv_pasokon_p7_sep,
        .backporch   = sstvenc_sstv_pasokon_p7_sep,
        .finalseq    = NULL,
        .scanline_period_ns
        = {SSTVENC_PASOKON_SCAN(SSTVENC_PASOKON_P7_TIMEUNIT),
           SSTVENC_PASOKON_SCAN(SSTVENC_PASOKON_P7_TIMEUNIT),
           SSTVENC_PASOKON_SCAN(SSTVENC_PASOKON_P7_TIMEUNIT)},
        .width              = 640,
        .height             = 496,
        .colour_space_order = SSTVENC_MODE_ORDER(
            SSTVENC_CSO_MODE_RGB, SSTVENC_CSO_CH_R, SSTVENC_CSO_CH_G,
            SSTVENC_CSO_CH_B, SSTVENC_CSO_CH_NONE),
        .vis_code = 0x73,
    },
    /* PD modes */
    {
        .description        = "PD-50",
        .name               = "PD50",
        .initseq            = NULL,
        .frontporch         = sstvenc_sstv_pd_fp,
        .gap01              = NULL,
        .gap12              = NULL,
        .backporch          = NULL,
        .finalseq           = NULL,
        .scanline_period_ns = {91520000, 91520000, 91520000, 91520000},
        .width              = 320,
        .height             = 256,
        .colour_space_order = SSTVENC_MODE_ORDER(
            SSTVENC_CSO_MODE_YUV2, SSTVENC_CSO_CH_Y, SSTVENC_CSO_CH_U,
            SSTVENC_CSO_CH_V, SSTVENC_CSO_CH_Y2),
        .vis_code = 0x5d,
    },
    {
        .description        = "PD-90",
        .name               = "PD90",
        .initseq            = NULL,
        .frontporch         = sstvenc_sstv_pd_fp,
        .gap01              = NULL,
        .gap12              = NULL,
        .backporch          = NULL,
        .finalseq           = NULL,
        .scanline_period_ns = {170240000, 170240000, 170240000, 170240000},
        .width              = 320,
        .height             = 256,
        .colour_space_order = SSTVENC_MODE_ORDER(
            SSTVENC_CSO_MODE_YUV2, SSTVENC_CSO_CH_Y, SSTVENC_CSO_CH_U,
            SSTVENC_CSO_CH_V, SSTVENC_CSO_CH_Y2),
        .vis_code = 0x63,
    },
    {
        .description        = "PD-120",
        .name               = "PD120",
        .initseq            = NULL,
        .frontporch         = sstvenc_sstv_pd_fp,
        .gap01              = NULL,
        .gap12              = NULL,
        .backporch          = NULL,
        .finalseq           = NULL,
        .scanline_period_ns = {121600000, 121600000, 121600000, 121600000},
        .width              = 640,
        .height             = 496,
        .colour_space_order = SSTVENC_MODE_ORDER(
            SSTVENC_CSO_MODE_YUV2, SSTVENC_CSO_CH_Y, SSTVENC_CSO_CH_U,
            SSTVENC_CSO_CH_V, SSTVENC_CSO_CH_Y2),
        .vis_code = 0x5f,
    },
    {
        .description        = "PD-160",
        .name               = "PD160",
        .initseq            = NULL,
        .frontporch         = sstvenc_sstv_pd_fp,
        .gap01              = NULL,
        .gap12              = NULL,
        .backporch          = NULL,
        .finalseq           = NULL,
        .scanline_period_ns = {195584000, 195584000, 195584000, 195584000},
        .width              = 512,
        .height             = 400,
        .colour_space_order = SSTVENC_MODE_ORDER(
            SSTVENC_CSO_MODE_YUV2, SSTVENC_CSO_CH_Y, SSTVENC_CSO_CH_U,
            SSTVENC_CSO_CH_V, SSTVENC_CSO_CH_Y2),
        .vis_code = 0x62,
    },
    {
        .description        = "PD-180",
        .name               = "PD180",
        .initseq            = NULL,
        .frontporch         = sstvenc_sstv_pd_fp,
        .gap01              = NULL,
        .gap12              = NULL,
        .backporch          = NULL,
        .finalseq           = NULL,
        .scanline_period_ns = {183040000, 183040000, 183040000, 183040000},
        .width              = 640,
        .height             = 496,
        .colour_space_order = SSTVENC_MODE_ORDER(
            SSTVENC_CSO_MODE_YUV2, SSTVENC_CSO_CH_Y, SSTVENC_CSO_CH_U,
            SSTVENC_CSO_CH_V, SSTVENC_CSO_CH_Y2),
        .vis_code = 0x60,
    },
    {
        .description        = "PD-240",
        .name               = "PD240",
        .initseq            = NULL,
        .frontporch         = sstvenc_sstv_pd_fp,
        .gap01              = NULL,
        .gap12              = NULL,
        .backporch          = NULL,
        .finalseq           = NULL,
        .scanline_period_ns = {244480000, 244480000, 244480000, 244480000},
        .width              = 640,
        .height             = 496,
        .colour_space_order = SSTVENC_MODE_ORDER(
            SSTVENC_CSO_MODE_YUV2, SSTVENC_CSO_CH_Y, SSTVENC_CSO_CH_U,
            SSTVENC_CSO_CH_V, SSTVENC_CSO_CH_Y2),
        .vis_code = 0x61,
    },
    {
        .description        = "PD-290",
        .name               = "PD290",
        .initseq            = NULL,
        .frontporch         = sstvenc_sstv_pd_fp,
        .gap01              = NULL,
        .gap12              = NULL,
        .backporch          = NULL,
        .finalseq           = NULL,
        .scanline_period_ns = {228800000, 228800000, 228800000, 228800000},
        .width              = 800,
        .height             = 616,
        .colour_space_order = SSTVENC_MODE_ORDER(
            SSTVENC_CSO_MODE_YUV2, SSTVENC_CSO_CH_Y, SSTVENC_CSO_CH_U,
            SSTVENC_CSO_CH_V, SSTVENC_CSO_CH_Y2),
        .vis_code = 0x5e,
    },
    /*
     * Wraase SC-2 modes
     *
     * Separator is needed for W260 and W2120, but not W2180 in QSSTV and
     * slowrx. W2180 has a half-length pulse in the front porch sequence.
     */
    {
        .description        = "Wraase SC-2 60",
        .name               = "W260",
        .initseq            = NULL,
        .frontporch         = sstvenc_sstv_wraasesc2_120_fp,
        .gap01              = sstvenc_sstv_wraasesc2_sep,
        .gap12              = sstvenc_sstv_wraasesc2_sep,
        .backporch          = NULL,
        .finalseq           = NULL,
        .scanline_period_ns = {77627500, 77627500, 77627500},
        .width              = 320,
        .height             = 256,
        .colour_space_order = SSTVENC_MODE_ORDER(
            SSTVENC_CSO_MODE_RGB, SSTVENC_CSO_CH_R, SSTVENC_CSO_CH_G,
            SSTVENC_CSO_CH_B, SSTVENC_CSO_CH_NONE),
        .vis_code = 0xbb,
    },
    {
        .description        = "Wraase SC-2 120",
        .name               = "W2120",
        .initseq            = NULL,
        .frontporch         = sstvenc_sstv_wraasesc2_120_fp,
        .gap01              = sstvenc_sstv_wraasesc2_sep,
        .gap12              = sstvenc_sstv_wraasesc2_sep,
        .backporch          = NULL,
        .finalseq           = NULL,
        .scanline_period_ns = {155985000, 155985000, 155985000},
        .width              = 320,
        .height             = 256,
        .colour_space_order = SSTVENC_MODE_ORDER(
            SSTVENC_CSO_MODE_RGB, SSTVENC_CSO_CH_R, SSTVENC_CSO_CH_G,
            SSTVENC_CSO_CH_B, SSTVENC_CSO_CH_NONE),
        .vis_code = 0x3f,
    },
    {
        .description        = "Wraase SC-2 180",
        .name               = "W2180",
        .initseq            = NULL,
        .frontporch         = sstvenc_sstv_wraasesc2_180_fp,
        .gap01              = NULL,
        .gap12              = NULL,
        .backporch          = NULL,
        .finalseq           = NULL,
        .scanline_period_ns = {235000000, 235000000, 235000000},
        .width              = 320,
        .height             = 256,
        .colour_space_order = SSTVENC_MODE_ORDER(
            SSTVENC_CSO_MODE_RGB, SSTVENC_CSO_CH_R, SSTVENC_CSO_CH_G,
            SSTVENC_CSO_CH_B, SSTVENC_CSO_CH_NONE),
        .vis_code = 0x37,
    },
};
 
uint8_t sstvenc_get_mode_count() {
        return sizeof(sstvenc_sstv_modes) / sizeof(sstvenc_sstv_modes[0]);
}
 
const struct sstvenc_mode* sstvenc_get_mode_by_idx(uint8_t idx) {
        if (idx < sstvenc_get_mode_count()) {
                return &sstvenc_sstv_modes[idx];
        } else {
                return NULL;
        }
}
 
const struct sstvenc_mode* sstvenc_get_mode_by_name(const char* name) {
        for (uint8_t idx = 0; idx < sstvenc_get_mode_count(); idx++) {
                if (!strcmp(sstvenc_sstv_modes[idx].name, name)) {
                        return &sstvenc_sstv_modes[idx];
                }
        }
        return NULL;
}
 
uint64_t
sstvenc_pulseseq_get_txtime(const struct sstvenc_encoder_pulse* seq) {
        uint64_t txtime = 0;
 
        while ((seq != NULL) && (seq->duration_ns > 0)) {
                txtime += seq->duration_ns;
                seq++;
        }
 
        return txtime;
}
 
uint64_t sstvenc_mode_get_txtime(const struct sstvenc_mode* const mode,
                                 const char*                      fsk_id) {
        uint64_t txtime  = 0;
 
        /* Compute each scan line */
        txtime          += sstvenc_pulseseq_get_txtime(mode->frontporch);
 
        for (uint8_t ch = 0; ch < 4; ch++) {
                if (SSTVENC_MODE_GET_CH(ch, mode->colour_space_order)
                    != SSTVENC_CSO_CH_NONE) {
                        /* There's a scan line here */
                        txtime += mode->scanline_period_ns[ch];
 
                        switch (ch) {
                        case 0:
                                txtime += sstvenc_pulseseq_get_txtime(
                                    mode->gap01);
                                break;
                        case 1:
                                txtime += sstvenc_pulseseq_get_txtime(
                                    mode->gap12);
                                break;
                        case 2:
                                txtime += sstvenc_pulseseq_get_txtime(
                                    mode->gap23);
                                break;
                        default:
                                break;
                        }
                }
        }
 
        txtime += sstvenc_pulseseq_get_txtime(mode->backporch);
 
        /* This is repeated for each scan line */
        switch (mode->colour_space_order & SSTVENC_CSO_MASK_MODE) {
        case SSTVENC_CSO_MODE_YUV2:
                /* Each scan line is two image lines */
                txtime *= mode->height / 2;
                break;
        default:
                /* Each scan line is an image line */
                txtime *= mode->height;
                break;
        }
 
        /*
         * VIS header:
         */
        txtime += 1000
                  * (SSTVENC_PERIOD_VIS_START       /* START bit 1 */
                     + SSTVENC_PERIOD_VIS_SYNC      /* START bit 2 */
                     + SSTVENC_PERIOD_VIS_START     /* START bit 3 */
                     + SSTVENC_PERIOD_VIS_BIT       /* START bit 4 */
                     + (7 * SSTVENC_PERIOD_VIS_BIT) /* data bits */
                     + SSTVENC_PERIOD_VIS_BIT       /* PARITY bit */
                     + SSTVENC_PERIOD_VIS_BIT       /* STOP bit */
                  );
 
        /* Before and after, we have sequences of pulses */
        txtime += sstvenc_pulseseq_get_txtime(mode->initseq);
        txtime += sstvenc_pulseseq_get_txtime(mode->finalseq);
 
        if (fsk_id) {
                /* Add the duration of the FSK ID */
                txtime += 1000
                          * ((SSTVENC_PERIOD_FSKID_BIT
                              * 12) /* 12 bits preamble */
                             + (SSTVENC_PERIOD_FSKID_BIT * strlen(fsk_id)
                                * 6) /* 6 bits/char ID */
                             + (SSTVENC_PERIOD_FSKID_BIT
                                * 6) /* 6 bits trailer */
                          );
        }
 
        return txtime;
}
 
size_t sstvenc_mode_get_fb_sz(const struct sstvenc_mode* const mode) {
        size_t sz = mode->width * mode->height * sizeof(uint8_t);
 
        if ((mode->colour_space_order & SSTVENC_CSO_MASK_MODE)
            != SSTVENC_CSO_MODE_MONO) {
                /* 3 channels needed */
                sz *= 3;
        }
 
        return sz;
}
 
uint32_t sstvenc_get_pixel_posn(const struct sstvenc_mode* const mode,
                                uint16_t x, uint16_t y) {
        assert(x < mode->width);
        assert(y < mode->height);
 
        uint32_t idx  = y * mode->width;
        idx          += x;
 
        if ((mode->colour_space_order & SSTVENC_CSO_MASK_MODE)
            != SSTVENC_CSO_MODE_MONO) {
                /* These are 3-colour tuples */
                idx *= 3;
        }
 
        return idx;
}