libavdevice/v4l2.c File Reference

#include "config.h"
#include "libavformat/avformat.h"
#include <unistd.h>
#include <fcntl.h>
#include <sys/ioctl.h>
#include <sys/mman.h>
#include <sys/time.h>
#include <asm/types.h>
#include <linux/videodev2.h>
#include <time.h>
#include <strings.h>

Go to the source code of this file.

Data Structures
struct	video_data
struct	buff_data
struct	fmt_map
Enumerations
enum	io_method { io_read, io_mmap, io_userptr }
Functions
static int	device_open (AVFormatContext *ctx, uint32_t *capabilities)
static int	device_init (AVFormatContext *ctx, int *width, int *height, uint32_t pix_fmt)
static int	first_field (int fd)
static uint32_t	fmt_ff2v4l (enum PixelFormat pix_fmt, enum CodecID codec_id)
static enum PixelFormat	fmt_v4l2ff (uint32_t v4l2_fmt, enum CodecID codec_id)
static enum CodecID	fmt_v4l2codec (uint32_t v4l2_fmt)
static int	mmap_init (AVFormatContext *ctx)
static int	read_init (AVFormatContext *ctx)
static void	mmap_release_buffer (AVPacket *pkt)
static int	mmap_read_frame (AVFormatContext *ctx, AVPacket *pkt)
static int	read_frame (AVFormatContext *ctx, AVPacket *pkt)
static int	mmap_start (AVFormatContext *ctx)
static void	mmap_close (struct video_data *s)
static int	v4l2_set_parameters (AVFormatContext *s1, AVFormatParameters *ap)
static uint32_t	device_try_init (AVFormatContext *s1, const AVFormatParameters *ap, int *width, int *height, enum CodecID *codec_id)
static int	v4l2_read_header (AVFormatContext *s1, AVFormatParameters *ap)
static int	v4l2_read_packet (AVFormatContext *s1, AVPacket *pkt)
static int	v4l2_read_close (AVFormatContext *s1)
Variables
static const int	desired_video_buffers = 256
static struct fmt_map	fmt_conversion_table []
AVInputFormat	v4l2_demuxer

---

Enumeration Type Documentation

enum io_method

Enumerator:

io_read
io_mmap
io_userptr

Definition at line 49 of file v4l2.c.

---

Function Documentation

static int device_init	(	AVFormatContext *	ctx,
		int *	width,
		int *	height,
		uint32_t	pix_fmt
	)			[static]

Definition at line 196 of file v4l2.c.

Referenced by device_try_init().

static int device_open	(	AVFormatContext *	ctx,
		uint32_t *	capabilities
	)			[static]

Definition at line 152 of file v4l2.c.

Referenced by v4l2_read_header().

static uint32_t device_try_init	(	AVFormatContext *	s1,
		const AVFormatParameters *	ap,
		int *	width,
		int *	height,
		enum CodecID *	codec_id
	)			[static]

Definition at line 548 of file v4l2.c.

Referenced by v4l2_read_header().

static int first_field

(

int

fd

)

[static]

Definition at line 224 of file v4l2.c.

Referenced by dnxhd_decode_frame(), dnxhd_encode_picture(), and v4l2_read_header().

static uint32_t fmt_ff2v4l	(	enum PixelFormat	pix_fmt,
		enum CodecID	codec_id
	)			[static]

Definition at line 240 of file v4l2.c.

Referenced by device_try_init().

static enum CodecID fmt_v4l2codec

(

uint32_t

v4l2_fmt

)

[static]

Definition at line 270 of file v4l2.c.

Referenced by device_try_init().

static enum PixelFormat fmt_v4l2ff	(	uint32_t	v4l2_fmt,
		enum CodecID	codec_id
	)			[static]

Definition at line 256 of file v4l2.c.

Referenced by v4l2_read_header().

static void mmap_close

(

struct video_data *

s

)

[static]

Definition at line 476 of file v4l2.c.

Referenced by v4l2_read_close().

static int mmap_init

(

AVFormatContext *

ctx

)

[static]

Definition at line 283 of file v4l2.c.

Referenced by v4l2_read_header().

static int mmap_read_frame	(	AVFormatContext *	ctx,
		AVPacket *	pkt
	)			[static]

Definition at line 386 of file v4l2.c.

Referenced by v4l2_read_packet().

static void mmap_release_buffer

(

AVPacket *

pkt

)

[static]

Definition at line 361 of file v4l2.c.

Referenced by mmap_read_frame().

static int mmap_start

(

AVFormatContext *

ctx

)

[static]

Definition at line 443 of file v4l2.c.

Referenced by v4l2_read_header().

static int read_frame	(	AVFormatContext *	ctx,
		AVPacket *	pkt
	)			[static]

Definition at line 438 of file v4l2.c.

Referenced by v4l2_read_packet(), and vid_read_packet().

static int read_init

(

AVFormatContext *

ctx

)

[static]

Definition at line 356 of file v4l2.c.

Referenced by v4l2_read_header().

static int v4l2_read_close

(

AVFormatContext *

s1

)

[static]

Definition at line 691 of file v4l2.c.

static int v4l2_read_header	(	AVFormatContext *	s1,
		AVFormatParameters *	ap
	)			[static]

Definition at line 580 of file v4l2.c.

static int v4l2_read_packet	(	AVFormatContext *	s1,
		AVPacket *	pkt
	)			[static]

Definition at line 663 of file v4l2.c.

static int v4l2_set_parameters	(	AVFormatContext *	s1,
		AVFormatParameters *	ap
	)			[static]

Definition at line 493 of file v4l2.c.

Referenced by v4l2_read_header().

---

Variable Documentation

const int desired_video_buffers = 256 [static]

Definition at line 47 of file v4l2.c.

Referenced by mmap_init().

struct fmt_map fmt_conversion_table[] [static]

Definition at line 79 of file v4l2.c.

AVInputFormat v4l2_demuxer

Initial value:

 {
    "video4linux2",
    NULL_IF_CONFIG_SMALL("Video4Linux2 device grab"),
    sizeof(struct video_data),
    NULL,
    v4l2_read_header,
    v4l2_read_packet,
    v4l2_read_close,
    .flags = AVFMT_NOFILE,
}

Definition at line 703 of file v4l2.c.