vsrc_life.c File Reference

life video source, based on John Conways' Life Game More...

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

Go to the source code of this file.

Data Structures
struct	LifeContext

Macros
#define	ALIVE_CELL   0xFF
#define	OFFSET(x)   offsetof(LifeContext, x)
#define	FLAGS   AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM
#define	FAST_DIV255(x)   ((((x) + 128) * 257) >> 16)

Functions
	AVFILTER_DEFINE_CLASS (life)
static int	parse_rule (uint16_t *born_rule, uint16_t *stay_rule, const char *rule_str, void *log_ctx)
static int	init_pattern_from_file (AVFilterContext *ctx)
static int	init (AVFilterContext *ctx)
static av_cold void	uninit (AVFilterContext *ctx)
static int	config_props (AVFilterLink *outlink)
static void	evolve (AVFilterContext *ctx)
static void	fill_picture_monoblack (AVFilterContext *ctx, AVFrame *picref)
static void	fill_picture_rgb (AVFilterContext *ctx, AVFrame *picref)
static int	request_frame (AVFilterLink *outlink)
static int	query_formats (AVFilterContext *ctx)

Variables
static const AVOption	life_options []
static const AVFilterPad	life_outputs []
AVFilter	avfilter_vsrc_life

Detailed Description

life video source, based on John Conways' Life Game

Definition in file vsrc_life.c.

Macro Definition Documentation

#define ALIVE_CELL   0xFF

Definition at line 75 of file vsrc_life.c.

Referenced by evolve(), fill_picture_monoblack(), fill_picture_rgb(), init(), and init_pattern_from_file().

#define OFFSET

(

x

)

offsetof(LifeContext, x)

Definition at line 76 of file vsrc_life.c.

#define FLAGS   AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM

Definition at line 77 of file vsrc_life.c.

#define FAST_DIV255

(

x

)

((((x) + 128) * 257) >> 16)

Definition at line 368 of file vsrc_life.c.

Referenced by fill_picture_rgb().

Function Documentation

AVFILTER_DEFINE_CLASS

(

life

)

static int parse_rule ( uint16_t *  born_rule, uint16_t *  stay_rule, const char *  rule_str, void *  log_ctx  )

static

Definition at line 101 of file vsrc_life.c.

Referenced by init().

static int init_pattern_from_file ( AVFilterContext *  ctx )

static

Definition at line 162 of file vsrc_life.c.

Referenced by init().

static int init ( AVFilterContext *  ctx )

static

Definition at line 220 of file vsrc_life.c.

static av_cold void uninit ( AVFilterContext *  ctx )

static

Definition at line 269 of file vsrc_life.c.

static int config_props ( AVFilterLink *  outlink )

static

Definition at line 279 of file vsrc_life.c.

static void evolve ( AVFilterContext *  ctx )

static

Definition at line 290 of file vsrc_life.c.

Referenced by request_frame().

static void fill_picture_monoblack ( AVFilterContext *  ctx, AVFrame *  picref  )

static

Definition at line 345 of file vsrc_life.c.

Referenced by query_formats().

static void fill_picture_rgb ( AVFilterContext *  ctx, AVFrame *  picref  )

static

Definition at line 370 of file vsrc_life.c.

Referenced by query_formats().

static int request_frame ( AVFilterLink *  outlink )

static

Definition at line 397 of file vsrc_life.c.

static int query_formats ( AVFilterContext *  ctx )

static

Definition at line 414 of file vsrc_life.c.

Variable Documentation

const AVOption life_options[]

static

Initial value:

= {
    { "filename", "set source file",  OFFSET(filename), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, FLAGS },
    { "f",        "set source file",  OFFSET(filename), AV_OPT_TYPE_STRING, {.str = NULL}, 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 },
    { "rate",     "set video rate",   OFFSET(frame_rate), AV_OPT_TYPE_VIDEO_RATE, {.str = "25"}, 0, 0, FLAGS },
    { "r",        "set video rate",   OFFSET(frame_rate), AV_OPT_TYPE_VIDEO_RATE, {.str = "25"}, 0, 0, FLAGS },
    { "rule",     "set rule",         OFFSET(rule_str), AV_OPT_TYPE_STRING, {.str = "B3/S23"}, CHAR_MIN, CHAR_MAX, 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 },
    { "stitch",      "stitch boundaries", OFFSET(stitch), AV_OPT_TYPE_INT, {.i64=1}, 0, 1, FLAGS },
    { "mold",        "set mold speed for dead cells", OFFSET(mold), AV_OPT_TYPE_INT, {.i64=0}, 0, 0xFF, FLAGS },
    { "life_color",  "set life color",  OFFSET( life_color), AV_OPT_TYPE_COLOR, {.str="white"}, CHAR_MIN, CHAR_MAX, FLAGS },
    { "death_color", "set death color", OFFSET(death_color), AV_OPT_TYPE_COLOR, {.str="black"}, CHAR_MIN, CHAR_MAX, FLAGS },
    { "mold_color",  "set mold color",  OFFSET( mold_color), AV_OPT_TYPE_COLOR, {.str="black"}, CHAR_MIN, CHAR_MAX, FLAGS },
    { NULL },
}

Definition at line 79 of file vsrc_life.c.

const AVFilterPad life_outputs[]

static

Initial value:

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

Definition at line 430 of file vsrc_life.c.

AVFilter avfilter_vsrc_life

Initial value:

= {
    .name        = "life",
    .description = NULL_IF_CONFIG_SMALL("Create life."),
    .priv_size = sizeof(LifeContext),
    .init      = init,
    .uninit    = uninit,
    .query_formats = query_formats,
    .inputs        = NULL,
    .outputs       = life_outputs,
    .priv_class    = &life_class,
}

Definition at line 440 of file vsrc_life.c.