v4l2_buffers.h File Reference

#include <stdatomic.h>
#include <stddef.h>
#include <linux/videodev2.h>
#include "libavutil/frame.h"
#include "packet.h"

Go to the source code of this file.

Data Structures
struct	V4L2Buffer
	V4L2Buffer (wrapper for v4l2_buffer management) More...
struct	V4L2Buffer::V4L2Plane_info

Enumerations
enum	V4L2Buffer_status { V4L2BUF_AVAILABLE, V4L2BUF_IN_DRIVER, V4L2BUF_RET_USER }

Functions
int	ff_v4l2_buffer_buf_to_avframe (AVFrame *frame, V4L2Buffer *buf)
	Extracts the data from a V4L2Buffer to an AVFrame. More...
int	ff_v4l2_buffer_buf_to_avpkt (AVPacket *pkt, V4L2Buffer *buf)
	Extracts the data from a V4L2Buffer to an AVPacket. More...
int	ff_v4l2_buffer_avpkt_to_buf (const AVPacket *pkt, V4L2Buffer *out)
	Extracts the data from an AVPacket to a V4L2Buffer. More...
int	ff_v4l2_buffer_avframe_to_buf (const AVFrame *frame, V4L2Buffer *out)
	Extracts the data from an AVFrame to a V4L2Buffer. More...
int	ff_v4l2_buffer_initialize (V4L2Buffer *avbuf, int index)
	Initializes a V4L2Buffer. More...
int	ff_v4l2_buffer_enqueue (V4L2Buffer *avbuf)
	Enqueues a V4L2Buffer. More...

Enumeration Type Documentation

V4L2Buffer_status

enum V4L2Buffer_status

Enumerator
V4L2BUF_AVAILABLE
V4L2BUF_IN_DRIVER
V4L2BUF_RET_USER

Definition at line 34 of file v4l2_buffers.h.

Function Documentation

ff_v4l2_buffer_buf_to_avframe()

int ff_v4l2_buffer_buf_to_avframe	(	AVFrame *	frame,
		V4L2Buffer *	buf
	)

Extracts the data from a V4L2Buffer to an AVFrame.

Parameters

[in]	frame	The AVFRame to push the information to
[in]	buf	The V4L2Buffer to get the information from

Returns

0 in case of success, AVERROR(EINVAL) if the number of planes is incorrect, AVERROR(ENOMEM) if the AVBufferRef can't be created.

Definition at line 417 of file v4l2_buffers.c.

Referenced by ff_v4l2_context_dequeue_frame().

ff_v4l2_buffer_buf_to_avpkt()

int ff_v4l2_buffer_buf_to_avpkt	(	AVPacket *	pkt,
		V4L2Buffer *	buf
	)

Extracts the data from a V4L2Buffer to an AVPacket.

Parameters

[in]	pkt	The AVPacket to push the information to
[in]	buf	The V4L2Buffer to get the information from

Returns

0 in case of success, AVERROR(EINVAL) if the number of planes is incorrect, AVERROR(ENOMEM) if the AVBufferRef can't be created.

Definition at line 452 of file v4l2_buffers.c.

Referenced by ff_v4l2_context_dequeue_packet().

ff_v4l2_buffer_avpkt_to_buf()

int ff_v4l2_buffer_avpkt_to_buf	(	const AVPacket *	pkt,
		V4L2Buffer *	out
	)

Extracts the data from an AVPacket to a V4L2Buffer.

Parameters

[in]	frame	AVPacket to get the data from
[in]	avbuf	V4L2Bfuffer to push the information to

Returns

0 in case of success, a negative AVERROR code otherwise

Definition at line 477 of file v4l2_buffers.c.

Referenced by ff_v4l2_context_enqueue_packet().

ff_v4l2_buffer_avframe_to_buf()

int ff_v4l2_buffer_avframe_to_buf	(	const AVFrame *	frame,
		V4L2Buffer *	out
	)

Extracts the data from an AVFrame to a V4L2Buffer.

Parameters

[in]	frame	AVFrame to get the data from
[in]	avbuf	V4L2Bfuffer to push the information to

Returns

0 in case of success, a negative AVERROR code otherwise

Definition at line 410 of file v4l2_buffers.c.

Referenced by ff_v4l2_context_enqueue_frame().

ff_v4l2_buffer_initialize()

int ff_v4l2_buffer_initialize	(	V4L2Buffer *	avbuf,
		int	index
	)

Initializes a V4L2Buffer.

Parameters

[in]	avbuf	V4L2Bfuffer to initialize
[in]	index	v4l2 buffer id

Returns

0 in case of success, a negative AVERROR code otherwise

Definition at line 493 of file v4l2_buffers.c.

Referenced by ff_v4l2_context_init().

ff_v4l2_buffer_enqueue()

int ff_v4l2_buffer_enqueue

(

V4L2Buffer *

avbuf

)

Enqueues a V4L2Buffer.

Parameters

[in]

avbuf

V4L2Bfuffer to push to the driver

Returns

0 in case of success, a negative AVERROR code otherwise

Definition at line 560 of file v4l2_buffers.c.

Referenced by ff_v4l2_buffer_initialize(), ff_v4l2_context_enqueue_frame(), ff_v4l2_context_enqueue_packet(), and v4l2_free_buffer().