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Data Structures | Macros | Functions | Variables
vsrc_life.c File Reference

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

#include "libavutil/file.h"
#include "libavutil/internal.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 av_cold 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 ff_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
#define OFFSET (   x)    offsetof(LifeContext, x)

Definition at line 77 of file vsrc_life.c.

Definition at line 78 of file vsrc_life.c.

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

Definition at line 369 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 102 of file vsrc_life.c.

Referenced by init().

static int init_pattern_from_file ( AVFilterContext ctx)
static

Definition at line 163 of file vsrc_life.c.

Referenced by init().

static av_cold int init ( AVFilterContext ctx)
static

Definition at line 221 of file vsrc_life.c.

static av_cold void uninit ( AVFilterContext ctx)
static

Definition at line 270 of file vsrc_life.c.

static int config_props ( AVFilterLink outlink)
static

Definition at line 280 of file vsrc_life.c.

static void evolve ( AVFilterContext ctx)
static

Definition at line 291 of file vsrc_life.c.

Referenced by request_frame().

static void fill_picture_monoblack ( AVFilterContext ctx,
AVFrame picref 
)
static

Definition at line 346 of file vsrc_life.c.

Referenced by query_formats().

static void fill_picture_rgb ( AVFilterContext ctx,
AVFrame picref 
)
static

Definition at line 371 of file vsrc_life.c.

Referenced by query_formats().

static int request_frame ( AVFilterLink outlink)
static

Definition at line 398 of file vsrc_life.c.

static int query_formats ( AVFilterContext ctx)
static

Definition at line 415 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, INT_MAX, FLAGS },
{ "r", "set video rate", OFFSET(frame_rate), AV_OPT_TYPE_VIDEO_RATE, {.str = "25"}, 0, INT_MAX, 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_BOOL, {.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 }
}
#define NULL
Definition: coverity.c:32
#define OFFSET(x)
Definition: vsrc_life.c:77
#define FLAGS
Definition: vsrc_life.c:78
#define M_PHI
Definition: mathematics.h:49
offset must point to AVRational
Definition: opt.h:236
offset must point to two consecutive integers
Definition: opt.h:233

Definition at line 80 of file vsrc_life.c.

const AVFilterPad life_outputs[]
static
Initial value:
= {
{
.name = "default",
.request_frame = request_frame,
.config_props = config_props,
},
{ NULL}
}
#define NULL
Definition: coverity.c:32
static int request_frame(AVFilterLink *outlink)
Definition: vsrc_life.c:398
static int config_props(AVFilterLink *outlink)
Definition: vsrc_life.c:280

Definition at line 434 of file vsrc_life.c.

AVFilter ff_vsrc_life
Initial value:
= {
.name = "life",
.description = NULL_IF_CONFIG_SMALL("Create life."),
.priv_size = sizeof(LifeContext),
.priv_class = &life_class,
.init = init,
}
#define NULL
Definition: coverity.c:32
static const AVFilterPad life_outputs[]
Definition: vsrc_life.c:434
static av_cold int init(AVFilterContext *ctx)
Definition: vsrc_life.c:221
static int query_formats(AVFilterContext *ctx)
Definition: vsrc_life.c:415
static av_cold void uninit(AVFilterContext *ctx)
Definition: vsrc_life.c:270
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:176
static const AVFilterPad outputs[]
Definition: af_afftfilt.c:386
static const AVFilterPad inputs[]
Definition: af_afftfilt.c:376

Definition at line 444 of file vsrc_life.c.