lavfi.c File Reference

libavfilter virtual input device More...

#include <float.h>
#include "libavutil/bprint.h"
#include "libavutil/channel_layout.h"
#include "libavutil/file.h"
#include "libavutil/imgutils.h"
#include "libavutil/internal.h"
#include "libavutil/log.h"
#include "libavutil/mem.h"
#include "libavutil/opt.h"
#include "libavutil/parseutils.h"
#include "libavutil/pixdesc.h"
#include "libavfilter/avfilter.h"
#include "libavfilter/buffersink.h"
#include "libavformat/demux.h"
#include "libavformat/internal.h"
#include "avdevice.h"

Go to the source code of this file.

Data Structures
struct	LavfiContext

Macros
#define	FAIL(ERR)
#define	OFFSET(x)
#define	DEC   AV_OPT_FLAG_DECODING_PARAM

Functions
static av_cold int	lavfi_read_close (AVFormatContext *avctx)
static int	create_subcc_streams (AVFormatContext *avctx)
static av_cold int	lavfi_read_header (AVFormatContext *avctx)
static int	create_subcc_packet (AVFormatContext *avctx, AVFrame *frame, int sink_idx)
static void	lavfi_free_frame (void *opaque, uint8_t *data)
static int	lavfi_read_packet (AVFormatContext *avctx, AVPacket *pkt)

Variables
static const AVOption	options []
static const AVClass	lavfi_class
const FFInputFormat	ff_lavfi_demuxer

Detailed Description

libavfilter virtual input device

Definition in file lavfi.c.

Macro Definition Documentation

FAIL

#define FAIL

(

ERR

)

Value:

{ ret = ERR; goto end; }

Referenced by lavfi_read_header().

OFFSET

#define OFFSET

(

x

)

Value:

offsetof(LavfiContext, x)

Definition at line 471 of file lavfi.c.

DEC

#define DEC   AV_OPT_FLAG_DECODING_PARAM

Definition at line 473 of file lavfi.c.

Function Documentation

lavfi_read_close()

static av_cold int lavfi_read_close ( AVFormatContext * avctx )

static

Definition at line 61 of file lavfi.c.

create_subcc_streams()

static int create_subcc_streams ( AVFormatContext * avctx )

static

Definition at line 75 of file lavfi.c.

Referenced by lavfi_read_header().

lavfi_read_header()

static av_cold int lavfi_read_header ( AVFormatContext * avctx )

static

Definition at line 100 of file lavfi.c.

create_subcc_packet()

static int create_subcc_packet ( AVFormatContext * avctx, AVFrame * frame, int sink_idx )

static

Definition at line 337 of file lavfi.c.

Referenced by lavfi_read_packet().

lavfi_free_frame()

static void lavfi_free_frame ( void * opaque, uint8_t * data )

static

Definition at line 356 of file lavfi.c.

Referenced by lavfi_read_packet().

lavfi_read_packet()

static int lavfi_read_packet ( AVFormatContext * avctx, AVPacket * pkt )

static

Definition at line 362 of file lavfi.c.

Variable Documentation

options

const AVOption options[]

static

Initial value:

= {
    { "graph",     "set libavfilter graph", OFFSET(graph_str),  AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, DEC },
    { "graph_file","set libavfilter graph filename", OFFSET(graph_filename), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, DEC},
    { "dumpgraph", "dump graph to stderr",  OFFSET(dump_graph), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, DEC },
    { NULL },
}

Definition at line 475 of file lavfi.c.

lavfi_class

const AVClass lavfi_class

static

Initial value:

= {
    .class_name = "lavfi indev",
    .item_name  = av_default_item_name,
    .option     = options,
    .version    = LIBAVUTIL_VERSION_INT,
    .category   = AV_CLASS_CATEGORY_DEVICE_INPUT,
}

Definition at line 482 of file lavfi.c.

ff_lavfi_demuxer

const FFInputFormat ff_lavfi_demuxer

Initial value:

= {
    .p.name         = "lavfi",
    .p.long_name    = NULL_IF_CONFIG_SMALL("Libavfilter virtual input device"),
    .p.flags        = AVFMT_NOFILE,
    .p.priv_class   = &lavfi_class,
    .priv_data_size = sizeof(LavfiContext),
    .read_header    = lavfi_read_header,
    .read_packet    = lavfi_read_packet,
    .read_close     = lavfi_read_close,
    .flags_internal = FF_INFMT_FLAG_INIT_CLEANUP,
}

Definition at line 490 of file lavfi.c.