libavfilter/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 "avfilter.h"
#include "internal.h"
#include "formats.h"
#include "video.h"

Go to the source code of this file.

Data Structures

struct  LifeContext

Defines

#define ALIVE_CELL   0xFF
#define OFFSET(x)   offsetof(LifeContext, x)
#define FLAGS   AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM
#define PARSE_COLOR(name)
#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, 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_monoblack (AVFilterContext *ctx, AVFilterBufferRef *picref)
static void fill_picture_rgb (AVFilterContext *ctx, AVFilterBufferRef *picref)
static int request_frame (AVFilterLink *outlink)
static int query_formats (AVFilterContext *ctx)

Variables

static const AVOption life_options []
AVFilter avfilter_vsrc_life

Detailed Description

life video source, based on John Conways' Life Game

Definition in file vsrc_life.c.

Define Documentation

#define ALIVE_CELL   0xFF

Definition at line 78 of file vsrc_life.c.

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

#define FAST_DIV255 ( x   )     ((((x) + 128) * 257) >> 16)

Definition at line 400 of file vsrc_life.c.

#define FLAGS   AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM

Definition at line 80 of file vsrc_life.c.

#define OFFSET ( x   )     offsetof(LifeContext, x)

Definition at line 79 of file vsrc_life.c.

#define PARSE_COLOR ( name   ) 

Value:

do { \
    if ((ret = av_parse_color(life->name ## _color, life->name ## _color_str, -1, ctx))) { \
        av_log(ctx, AV_LOG_ERROR, "Invalid " #name " color '%s'\n", \
               life->name ## _color_str); \
        return ret; \
    } \
    av_freep(&life->name ## _color_str); \
} while (0)

Referenced by init().

Function Documentation

AVFILTER_DEFINE_CLASS ( life   ) 

static int config_props ( AVFilterLink *  outlink  )  [static]

Definition at line 311 of file vsrc_life.c.

static void evolve ( AVFilterContext *  ctx  )  [static]

Definition at line 322 of file vsrc_life.c.

static void fill_picture_monoblack ( AVFilterContext *  ctx,
AVFilterBufferRef *  picref 
) [static]

Definition at line 377 of file vsrc_life.c.

Referenced by query_formats().

static void fill_picture_rgb ( AVFilterContext *  ctx,
AVFilterBufferRef *  picref 
) [static]

Definition at line 402 of file vsrc_life.c.

Referenced by query_formats().

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

Definition at line 223 of file vsrc_life.c.

static int init_pattern_from_file ( AVFilterContext *  ctx  )  [static]

Definition at line 165 of file vsrc_life.c.

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

Definition at line 104 of file vsrc_life.c.

Referenced by init().

static int query_formats ( AVFilterContext *  ctx  )  [static]

Definition at line 451 of file vsrc_life.c.

static int request_frame ( AVFilterLink *  outlink  )  [static]

Definition at line 429 of file vsrc_life.c.

static av_cold void uninit ( AVFilterContext *  ctx  )  [static]

Definition at line 301 of file vsrc_life.c.

Variable Documentation

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    = (const AVFilterPad[]) {
        { .name = NULL}
    },
    .outputs   = (const AVFilterPad[]) {
        { .name            = "default",
          .type            = AVMEDIA_TYPE_VIDEO,
          .request_frame   = request_frame,
          .config_props    = config_props },
        { .name = NULL}
    },
    .priv_class = &life_class,
}

Definition at line 467 of file vsrc_life.c.

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(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 },
    { "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_str), AV_OPT_TYPE_STRING, {.str="white"}, CHAR_MIN, CHAR_MAX, FLAGS },
    { "death_color", "set death color", OFFSET(death_color_str), AV_OPT_TYPE_STRING, {.str="black"}, CHAR_MIN, CHAR_MAX, FLAGS },
    { "mold_color",  "set mold color",  OFFSET( mold_color_str), AV_OPT_TYPE_STRING, {.str="black"}, CHAR_MIN, CHAR_MAX, FLAGS },
    { NULL },
}

Definition at line 82 of file vsrc_life.c.

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