libavdevice/bktr.c File Reference

#include "libavformat/internal.h"
#include "libavutil/log.h"
#include "libavutil/opt.h"
#include "libavutil/parseutils.h"
#include <unistd.h>
#include <fcntl.h>
#include <sys/ioctl.h>
#include <sys/mman.h>
#include <sys/time.h>
#include <signal.h>
#include <stdint.h>
#include "avdevice.h"

Go to the source code of this file.

Data Structures
struct	VideoData
Defines
#define	PAL   1
#define	PALBDGHI   1
#define	NTSC   2
#define	NTSCM   2
#define	SECAM   3
#define	PALN   4
#define	PALM   5
#define	NTSCJ   6
#define	PAL_HEIGHT   576
#define	SECAM_HEIGHT   576
#define	NTSC_HEIGHT   480
#define	VIDEO_FORMAT   NTSC
#define	OFFSET(x)   offsetof(VideoData, x)
#define	DEC   AV_OPT_FLAG_DECODING_PARAM
Functions
static void	catchsignal (int signal)
static av_cold int	bktr_init (const char *video_device, int width, int height, int format, int *video_fd, int *tuner_fd, int idev, double frequency)
static void	bktr_getframe (uint64_t per_frame)
static int	grab_read_packet (AVFormatContext *s1, AVPacket *pkt)
static int	grab_read_header (AVFormatContext *s1, AVFormatParameters *ap)
static int	grab_read_close (AVFormatContext *s1)
Variables
static int	bktr_dev []
uint8_t *	video_buf
size_t	video_buf_size
uint64_t	last_frame_time
volatile sig_atomic_t	nsignals
static const AVOption	options []
static const AVClass	bktr_class
AVInputFormat	ff_bktr_demuxer

---

Define Documentation

#define DEC   AV_OPT_FLAG_DECODING_PARAM

Definition at line 326 of file bktr.c.

#define NTSC   2

Definition at line 66 of file bktr.c.

Referenced by bktr_init(), grab_read_header(), and opt_target().

#define NTSC_HEIGHT   480

Definition at line 76 of file bktr.c.

Referenced by bktr_init().

#define NTSCJ   6

Definition at line 71 of file bktr.c.

Referenced by bktr_init().

#define NTSCM   2

Definition at line 67 of file bktr.c.

#define OFFSET

(

x

)

offsetof(VideoData, x)

Definition at line 325 of file bktr.c.

#define PAL   1

Definition at line 64 of file bktr.c.

Referenced by bktr_init(), grab_read_header(), and opt_target().

#define PAL_HEIGHT   576

Definition at line 74 of file bktr.c.

Referenced by bktr_init().

#define PALBDGHI   1

Definition at line 65 of file bktr.c.

#define PALM   5

Definition at line 70 of file bktr.c.

Referenced by bktr_init().

#define PALN   4

Definition at line 69 of file bktr.c.

Referenced by bktr_init().

#define SECAM   3

Definition at line 68 of file bktr.c.

Referenced by bktr_init(), and grab_read_header().

#define SECAM_HEIGHT   576

Definition at line 75 of file bktr.c.

Referenced by bktr_init().

#define VIDEO_FORMAT   NTSC

Definition at line 79 of file bktr.c.

Referenced by bktr_init().

---

Function Documentation

static void bktr_getframe

(

uint64_t

per_frame

)

[static]

Definition at line 211 of file bktr.c.

Referenced by grab_read_packet().

static av_cold int bktr_init	(	const char *	video_device,
		int	width,
		int	height,
		int	format,
		int *	video_fd,
		int *	tuner_fd,
		int	idev,
		double	frequency
	)			[static]

Definition at line 97 of file bktr.c.

Referenced by grab_read_header().

static void catchsignal

(

int

signal

)

[static]

Definition at line 91 of file bktr.c.

Referenced by bktr_init().

static int grab_read_close

(

AVFormatContext *

s1

)

[static]

Definition at line 307 of file bktr.c.

static int grab_read_header	(	AVFormatContext *	s1,
		AVFormatParameters *	ap
	)			[static]

Definition at line 246 of file bktr.c.

static int grab_read_packet	(	AVFormatContext *	s1,
		AVPacket *	pkt
	)			[static]

Definition at line 231 of file bktr.c.

---

Variable Documentation

const AVClass bktr_class [static]

Initial value:

 {
    .class_name = "BKTR grab interface",
    .item_name  = av_default_item_name,
    .option     = options,
    .version    = LIBAVUTIL_VERSION_INT,
}

Definition at line 340 of file bktr.c.

int bktr_dev[] [static]

Initial value:

 { METEOR_DEV0, METEOR_DEV1, METEOR_DEV2,
    METEOR_DEV3, METEOR_DEV_SVIDEO }

Definition at line 82 of file bktr.c.

Referenced by bktr_init().

AVInputFormat ff_bktr_demuxer

Initial value:

 {
    .name           = "bktr",
    .long_name      = NULL_IF_CONFIG_SMALL("video grab"),
    .priv_data_size = sizeof(VideoData),
    .read_header    = grab_read_header,
    .read_packet    = grab_read_packet,
    .read_close     = grab_read_close,
    .flags          = AVFMT_NOFILE,
    .priv_class     = &bktr_class,
}

Definition at line 347 of file bktr.c.

uint64_t last_frame_time

Definition at line 87 of file bktr.c.

Referenced by bktr_getframe(), and grab_read_header().

volatile sig_atomic_t nsignals

Definition at line 88 of file bktr.c.

Referenced by bktr_getframe(), catchsignal(), and grab_read_header().

const AVOption options[] [static]

Initial value:

 {
    { "standard", "", 0x42, AV_OPT_TYPE_INT, {.dbl = VIDEO_FORMAT}, PAL, NTSCJ, AV_OPT_FLAG_DECODING_PARAM, "standard" },
    { "PAL",      "", 0, AV_OPT_TYPE_CONST, {.dbl = PAL},   0, 0, AV_OPT_FLAG_DECODING_PARAM, "standard" },
    { "NTSC",     "", 0, AV_OPT_TYPE_CONST, {.dbl = NTSC},  0, 0, AV_OPT_FLAG_DECODING_PARAM, "standard" },
    { "SECAM",    "", 0, AV_OPT_TYPE_CONST, {.dbl = SECAM}, 0, 0, AV_OPT_FLAG_DECODING_PARAM, "standard" },
    { "PALN",     "", 0, AV_OPT_TYPE_CONST, {.dbl = PALN},  0, 0, AV_OPT_FLAG_DECODING_PARAM, "standard" },
    { "PALM",     "", 0, AV_OPT_TYPE_CONST, {.dbl = PALM},  0, 0, AV_OPT_FLAG_DECODING_PARAM, "standard" },
    { "NTSCJ",    "", 0, AV_OPT_TYPE_CONST, {.dbl = NTSCJ}, 0, 0, AV_OPT_FLAG_DECODING_PARAM, "standard" },
    { "video_size", "A string describing frame size, such as 640x480 or hd720.", OFFSET(video_size), AV_OPT_TYPE_STRING, {.str = "vga"}, 0, 0, DEC },
    { "framerate", "", OFFSET(framerate), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, DEC },
    { NULL },
}

Definition at line 327 of file bktr.c.

uint8_t* video_buf

Definition at line 85 of file bktr.c.

Referenced by bktr_init(), grab_read_close(), and grab_read_packet().

size_t video_buf_size

Definition at line 86 of file bktr.c.

Referenced by bktr_init(), grab_read_close(), and grab_read_packet().