qrencode.c File Reference

#include "config_components.h"
#include "libavutil/internal.h"
#include "libavutil/imgutils.h"
#include "libavutil/mem.h"
#include "libavutil/opt.h"
#include "libavutil/lfg.h"
#include "libavutil/random_seed.h"
#include "avfilter.h"
#include "drawutils.h"
#include "filters.h"
#include "formats.h"
#include "textutils.h"

Go to the source code of this file.

Data Structures
struct	QREncodeContext

Enumerations
enum	var_name {   VAR_dar , VAR_duration , VAR_hsub , VAR_vsub ,   VAR_main_h , VAR_H , VAR_main_w , VAR_W ,   VAR_n , VAR_pict_type , VAR_qr_w , VAR_w ,   VAR_rendered_padded_qr_w , VAR_Q , VAR_rendered_qr_w , VAR_q ,   VAR_sar , VAR_t , VAR_x , VAR_y ,   VAR_VARS_NB }
enum	Expansion { EXPANSION_NONE , EXPANSION_NORMAL }

Functions
static double	drand (void *opaque, double min, double max)
static int	func_pts (void *ctx, AVBPrint *bp, const char *function_name, unsigned argc, char **argv)
static int	func_frame_num (void *ctx, AVBPrint *bp, const char *function_name, unsigned argc, char **argv)
static int	func_strftime (void *ctx, AVBPrint *bp, const char *function_name, unsigned argc, char **argv)
static int	func_frame_metadata (void *ctx, AVBPrint *bp, const char *function_name, unsigned argc, char **argv)
static int	func_eval_expr (void *ctx, AVBPrint *bp, const char *function_name, unsigned argc, char **argv)
static int	func_eval_expr_formatted (void *ctx, AVBPrint *bp, const char *function_name, unsigned argc, char **argv)
static av_cold int	init (AVFilterContext *ctx)
static av_cold void	uninit (AVFilterContext *ctx)
static void	show_qrcode (AVFilterContext *ctx, const QRcode *qrcode)
static int	draw_qrcode (AVFilterContext *ctx, AVFrame *frame)
	AVFILTER_DEFINE_CLASS (qrencodesrc)
static int	qrencodesrc_config_props (AVFilterLink *outlink)
static int	request_frame (AVFilterLink *outlink)
static int	qrencodesrc_query_formats (const AVFilterContext *ctx, AVFilterFormatsConfig **cfg_in, AVFilterFormatsConfig **cfg_out)
	AVFILTER_DEFINE_CLASS (qrencode)
static int	qrencode_config_input (AVFilterLink *inlink)
static int	qrencode_query_formats (const AVFilterContext *ctx, AVFilterFormatsConfig **cfg_in, AVFilterFormatsConfig **cfg_out)
static int	filter_frame (AVFilterLink *inlink, AVFrame *frame)

Variables
static const char *const	var_names []
static const char *const	fun2_names []
static const ff_eval_func2	fun2 []
static const FFExpandTextFunction	expand_text_functions []
static const AVOption	qrencodesrc_options []
static const AVFilterPad	qrencodesrc_outputs []
const FFFilter	ff_vsrc_qrencodesrc
static const AVOption	qrencode_options []
static const AVFilterPad	avfilter_vf_qrencode_inputs []
const FFFilter	ff_vf_qrencode

Enumeration Type Documentation

var_name

enum var_name

Enumerator
VAR_dar
VAR_duration
VAR_hsub
VAR_vsub
VAR_main_h
VAR_H
VAR_main_w
VAR_W
VAR_n
VAR_pict_type
VAR_qr_w
VAR_w
VAR_rendered_padded_qr_w
VAR_Q
VAR_rendered_qr_w
VAR_q
VAR_sar
VAR_t
VAR_x
VAR_y
VAR_VARS_NB

Definition at line 51 of file qrencode.c.

Expansion

enum Expansion

Enumerator
EXPANSION_NONE
EXPANSION_NORMAL

Definition at line 89 of file qrencode.c.

Function Documentation

drand()

static double drand ( void * opaque, double min, double max )

static

Definition at line 185 of file qrencode.c.

func_pts()

static int func_pts ( void * ctx, AVBPrint * bp, const char * function_name, unsigned argc, char ** argv )

static

Definition at line 195 of file qrencode.c.

func_frame_num()

static int func_frame_num ( void * ctx, AVBPrint * bp, const char * function_name, unsigned argc, char ** argv )

static

Definition at line 217 of file qrencode.c.

func_strftime()

static int func_strftime ( void * ctx, AVBPrint * bp, const char * function_name, unsigned argc, char ** argv )

static

Definition at line 226 of file qrencode.c.

func_frame_metadata()

static int func_frame_metadata ( void * ctx, AVBPrint * bp, const char * function_name, unsigned argc, char ** argv )

static

Definition at line 234 of file qrencode.c.

func_eval_expr()

static int func_eval_expr ( void * ctx, AVBPrint * bp, const char * function_name, unsigned argc, char ** argv )

static

Definition at line 248 of file qrencode.c.

func_eval_expr_formatted()

static int func_eval_expr_formatted ( void * ctx, AVBPrint * bp, const char * function_name, unsigned argc, char ** argv )

static

Definition at line 258 of file qrencode.c.

init()

static av_cold int init ( AVFilterContext * ctx )

static

Definition at line 300 of file qrencode.c.

uninit()

static av_cold void uninit ( AVFilterContext * ctx )

static

Definition at line 331 of file qrencode.c.

show_qrcode()

static void show_qrcode ( AVFilterContext * ctx, const QRcode * qrcode )

static

Definition at line 346 of file qrencode.c.

Referenced by draw_qrcode().

draw_qrcode()

static int draw_qrcode ( AVFilterContext * ctx, AVFrame * frame )

static

Definition at line 364 of file qrencode.c.

Referenced by filter_frame(), and request_frame().

AVFILTER_DEFINE_CLASS() [1/2]

AVFILTER_DEFINE_CLASS

(

qrencodesrc

)

qrencodesrc_config_props()

static int qrencodesrc_config_props ( AVFilterLink * outlink )

static

Definition at line 587 of file qrencode.c.

request_frame()

static int request_frame ( AVFilterLink * outlink )

static

Definition at line 663 of file qrencode.c.

qrencodesrc_query_formats()

static int qrencodesrc_query_formats ( const AVFilterContext * ctx, AVFilterFormatsConfig ** cfg_in, AVFilterFormatsConfig ** cfg_out )

static

Definition at line 683 of file qrencode.c.

AVFILTER_DEFINE_CLASS() [2/2]

AVFILTER_DEFINE_CLASS

(

qrencode

)

qrencode_config_input()

static int qrencode_config_input ( AVFilterLink * inlink )

static

Definition at line 737 of file qrencode.c.

qrencode_query_formats()

static int qrencode_query_formats ( const AVFilterContext * ctx, AVFilterFormatsConfig ** cfg_in, AVFilterFormatsConfig ** cfg_out )

static

Definition at line 792 of file qrencode.c.

filter_frame()

static int filter_frame ( AVFilterLink * inlink, AVFrame * frame )

static

Definition at line 799 of file qrencode.c.

Variable Documentation

var_names

const char* const var_names[]

static

Initial value:

= {
    "dar",
    "duration",
    "hsub", "vsub",
    "main_h", "H",               
    "main_w", "W",               
    "n",                         
    "pict_type",
    "qr_w", "w",                 
    "rendered_padded_qr_w", "Q", 
    "rendered_qr_w", "q",        
    "sar",
    "t",                         
    "x",
    "y",
    NULL
}

Definition at line 69 of file qrencode.c.

fun2_names

const char* const fun2_names[]

static

Initial value:

= {
    "rand"
}

Definition at line 181 of file qrencode.c.

Referenced by config_input(), func_eval_expr(), and func_eval_expr_formatted().

fun2

const ff_eval_func2 fun2[]

static

Initial value:

= {
    drand,
    NULL
}

Definition at line 190 of file qrencode.c.

Referenced by config_input(), func_eval_expr(), and func_eval_expr_formatted().

expand_text_functions

const FFExpandTextFunction expand_text_functions[]

static

Initial value:

= {
    { "expr",            1, 1, func_eval_expr },
    { "e",               1, 1, func_eval_expr },
    { "expr_formatted",  2, 3, func_eval_expr_formatted },
    { "ef",              2, 3, func_eval_expr_formatted },
    { "metadata",        1, 2, func_frame_metadata },
    { "frame_num",       0, 0, func_frame_num },
    { "n",               0, 0, func_frame_num },
    { "gmtime",          0, 1, func_strftime },
    { "localtime",       0, 1, func_strftime },
    { "pts",             0, 3, func_pts }
}

Definition at line 287 of file qrencode.c.

Referenced by init(), and init().

qrencodesrc_options

const AVOption qrencodesrc_options[]

static

Initial value:

= {
    COMMON_OPTIONS
    { "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 },
    { NULL }
}

Definition at line 578 of file qrencode.c.

qrencodesrc_outputs

const AVFilterPad qrencodesrc_outputs[]

static

Initial value:

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

Definition at line 703 of file qrencode.c.

ff_vsrc_qrencodesrc

const FFFilter ff_vsrc_qrencodesrc

Initial value:

= {
    .p.name        = "qrencodesrc",
    .p.description = NULL_IF_CONFIG_SMALL("Generate a QR code."),
    .p.priv_class  = &qrencodesrc_class,
    .p.inputs      = NULL,
    .priv_size     = sizeof(QREncodeContext),
    .init          = init,
    .uninit        = uninit,
    FILTER_OUTPUTS(qrencodesrc_outputs),
    FILTER_QUERY_FUNC2(qrencodesrc_query_formats),
}

Definition at line 712 of file qrencode.c.

qrencode_options

const AVOption qrencode_options[]

static

Initial value:

= {
    COMMON_OPTIONS
    {"x",              "set x expression",      OFFSET(x_expr),             AV_OPT_TYPE_STRING, {.str="0"},   0, 0, TFLAGS},
    {"y",              "set y expression",      OFFSET(y_expr),             AV_OPT_TYPE_STRING, {.str="0"},   0, 0, TFLAGS},
    { NULL }
}

Definition at line 728 of file qrencode.c.

avfilter_vf_qrencode_inputs

const AVFilterPad avfilter_vf_qrencode_inputs[]

static

Initial value:

= {
    {
        .name           = "default",
        .type           = AVMEDIA_TYPE_VIDEO,
        .flags          = AVFILTERPAD_FLAG_NEEDS_WRITABLE,
        .filter_frame   = filter_frame,
        .config_props   = qrencode_config_input,
    },
}

Definition at line 821 of file qrencode.c.

ff_vf_qrencode

const FFFilter ff_vf_qrencode

Initial value:

= {
    .p.name        = "qrencode",
    .p.description = NULL_IF_CONFIG_SMALL("Draw a QR code on top of video frames."),
    .p.priv_class  = &qrencode_class,
    .p.flags       = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC,
    .priv_size     = sizeof(QREncodeContext),
    .init          = init,
    .uninit        = uninit,
    FILTER_INPUTS(avfilter_vf_qrencode_inputs),
    FILTER_OUTPUTS(ff_video_default_filterpad),
    FILTER_QUERY_FUNC2(qrencode_query_formats),
}

Definition at line 831 of file qrencode.c.