vsrc_cellauto.c File Reference

cellular automaton video source, based on Stephen Wolfram "experimentus crucis" More...

#include "libavutil/file.h"
#include "libavutil/lfg.h"
#include "libavutil/opt.h"
#include "libavutil/parseutils.h"
#include "libavutil/random_seed.h"
#include "avfilter.h"
#include "internal.h"
#include "formats.h"
#include "video.h"

Go to the source code of this file.

Data Structures
struct	CellAutoContext

Macros
#define	OFFSET(x)   offsetof(CellAutoContext, x)
#define	FLAGS   AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM

Functions
	AVFILTER_DEFINE_CLASS (cellauto)
static int	init_pattern_from_string (AVFilterContext *ctx)
static int	init_pattern_from_file (AVFilterContext *ctx)
static int	init (AVFilterContext *ctx, const char *args)
static av_cold void	uninit (AVFilterContext *ctx)
static int	config_props (AVFilterLink *outlink)
static void	evolve (AVFilterContext *ctx)
static void	fill_picture (AVFilterContext *ctx, AVFilterBufferRef *picref)
static int	request_frame (AVFilterLink *outlink)
static int	query_formats (AVFilterContext *ctx)

Variables
static const AVOption	cellauto_options []
static const AVFilterPad	cellauto_outputs []
AVFilter	avfilter_vsrc_cellauto

Detailed Description

cellular automaton video source, based on Stephen Wolfram "experimentus crucis"

Definition in file vsrc_cellauto.c.

Macro Definition Documentation

#define OFFSET

(

x

)

offsetof(CellAutoContext, x)

Definition at line 59 of file vsrc_cellauto.c.

#define FLAGS   AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM

Definition at line 60 of file vsrc_cellauto.c.

Function Documentation

AVFILTER_DEFINE_CLASS

(

cellauto

)

static int init_pattern_from_string ( AVFilterContext *  ctx )

static

Definition at line 103 of file vsrc_cellauto.c.

Referenced by init(), and init_pattern_from_file().

static int init_pattern_from_file ( AVFilterContext *  ctx )

static

Definition at line 142 of file vsrc_cellauto.c.

Referenced by init().

static int init ( AVFilterContext *  ctx, const char *  args  )

static

Definition at line 162 of file vsrc_cellauto.c.

static av_cold void uninit ( AVFilterContext *  ctx )

static

Definition at line 223 of file vsrc_cellauto.c.

static int config_props ( AVFilterLink *  outlink )

static

Definition at line 232 of file vsrc_cellauto.c.

static void evolve ( AVFilterContext *  ctx )

static

Definition at line 243 of file vsrc_cellauto.c.

Referenced by request_frame().

static void fill_picture ( AVFilterContext *  ctx, AVFilterBufferRef *  picref  )

static

Definition at line 274 of file vsrc_cellauto.c.

Referenced by request_frame().

static int request_frame ( AVFilterLink *  outlink )

static

Definition at line 302 of file vsrc_cellauto.c.

static int query_formats ( AVFilterContext *  ctx )

static

Definition at line 327 of file vsrc_cellauto.c.

Variable Documentation

const AVOption cellauto_options[]

static

Initial value:

= {
    { "filename", "read initial pattern from file", OFFSET(filename), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, FLAGS },
    { "f",        "read initial pattern from file", OFFSET(filename), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, FLAGS },
    { "pattern",  "set initial pattern", OFFSET(pattern), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, FLAGS },
    { "p",        "set initial pattern", OFFSET(pattern), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, FLAGS },
    { "rate",     "set video rate", OFFSET(rate), AV_OPT_TYPE_STRING, {.str = "25"}, 0, 0, FLAGS },
    { "r",        "set video rate", OFFSET(rate), AV_OPT_TYPE_STRING, {.str = "25"}, 0, 0, FLAGS },
    { "size",     "set video size", OFFSET(w),    AV_OPT_TYPE_IMAGE_SIZE, {.str = NULL}, 0, 0, FLAGS },
    { "s",        "set video size", OFFSET(w),    AV_OPT_TYPE_IMAGE_SIZE, {.str = NULL}, 0, 0, FLAGS },
    { "rule",     "set rule",       OFFSET(rule), AV_OPT_TYPE_INT,    {.i64 = 110},  0, 255, FLAGS },
    { "random_fill_ratio", "set fill ratio for filling initial grid randomly", OFFSET(random_fill_ratio), AV_OPT_TYPE_DOUBLE, {.dbl = 1/M_PHI}, 0, 1, FLAGS },
    { "ratio",             "set fill ratio for filling initial grid randomly", OFFSET(random_fill_ratio), AV_OPT_TYPE_DOUBLE, {.dbl = 1/M_PHI}, 0, 1, FLAGS },
    { "random_seed", "set the seed for filling the initial grid randomly", OFFSET(random_seed), AV_OPT_TYPE_INT, {.i64 = -1}, -1, UINT32_MAX, FLAGS },
    { "seed",        "set the seed for filling the initial grid randomly", OFFSET(random_seed), AV_OPT_TYPE_INT, {.i64 = -1}, -1, UINT32_MAX, FLAGS },
    { "scroll",      "scroll pattern downward", OFFSET(scroll), AV_OPT_TYPE_INT, {.i64 = 1}, 0, 1, FLAGS },
    { "start_full",  "start filling the whole video", OFFSET(start_full), AV_OPT_TYPE_INT, {.i64 = 0}, 0, 1, FLAGS },
    { "full",        "start filling the whole video", OFFSET(start_full), AV_OPT_TYPE_INT, {.i64 = 1}, 0, 1, FLAGS },
    { "stitch",      "stitch boundaries", OFFSET(stitch), AV_OPT_TYPE_INT,    {.i64 = 1},   0, 1, FLAGS },
    { NULL },
}

Definition at line 62 of file vsrc_cellauto.c.

const AVFilterPad cellauto_outputs[]

static

Initial value:

= {
    {
        .name            = "default",
        .type            = AVMEDIA_TYPE_VIDEO,
        .request_frame   = request_frame,
        .config_props    = config_props,
    },
    { NULL }
}

Definition at line 334 of file vsrc_cellauto.c.

AVFilter avfilter_vsrc_cellauto

Initial value:

= {
    .name        = "cellauto",
    .description = NULL_IF_CONFIG_SMALL("Create pattern generated by an elementary cellular automaton."),
    .priv_size = sizeof(CellAutoContext),
    .init      = init,
    .uninit    = uninit,
    .query_formats = query_formats,
    .inputs        = NULL,
    .outputs       = cellauto_outputs,
    .priv_class    = &cellauto_class,
}

Definition at line 344 of file vsrc_cellauto.c.