#include <linux/videodev2.h>
#include <sys/ioctl.h>
#include <sys/mman.h>
#include <unistd.h>
#include <fcntl.h>
#include <poll.h>
#include "libavcodec/avcodec.h"
#include "libavutil/pixdesc.h"
#include "v4l2_context.h"
#include "v4l2_buffers.h"
#include "v4l2_m2m.h"

Macros
#define	USEC_PER_SEC 1000000

Functions
static V4L2m2mContext *	buf_to_m2mctx (V4L2Buffer *buf)

static AVCodecContext *	logger (V4L2Buffer *buf)

static AVRational	v4l2_get_timebase (V4L2Buffer *avbuf)

static void	v4l2_set_pts (V4L2Buffer *out, int64_t pts)

static int64_t	v4l2_get_pts (V4L2Buffer *avbuf)

static enum AVColorPrimaries	v4l2_get_color_primaries (V4L2Buffer *buf)

static enum AVColorRange	v4l2_get_color_range (V4L2Buffer *buf)

static enum AVColorSpace	v4l2_get_color_space (V4L2Buffer *buf)

static enum AVColorTransferCharacteristic	v4l2_get_color_trc (V4L2Buffer *buf)

static void	v4l2_free_buffer (void opaque, uint8_t unused)

static int	v4l2_buf_increase_ref (V4L2Buffer *in)

static int	v4l2_buf_to_bufref (V4L2Buffer in, int plane, AVBufferRef *buf)

static int	v4l2_bufref_to_buf (V4L2Buffer out, int plane, const uint8_t data, int size, int offset)

static int	v4l2_buffer_buf_to_swframe (AVFrame frame, V4L2Buffer avbuf)

static int	v4l2_buffer_swframe_to_buf (const AVFrame frame, V4L2Buffer out)

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_buf_to_avframe (AVFrame frame, V4L2Buffer avbuf)
	Extracts the data from a V4L2Buffer to an AVFrame. More...

int	ff_v4l2_buffer_buf_to_avpkt (AVPacket pkt, V4L2Buffer avbuf)
	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_initialize (V4L2Buffer *avbuf, int index)
	Initializes a V4L2Buffer. More...

int	ff_v4l2_buffer_enqueue (V4L2Buffer *avbuf)
	Enqueues a V4L2Buffer. More...

Variables
static AVRational	v4l2_timebase = { 1, USEC_PER_SEC }

Macro Definition Documentation

◆ USEC_PER_SEC

#define USEC_PER_SEC 1000000

Definition at line 36 of file v4l2_buffers.c.

Function Documentation

◆ buf_to_m2mctx()

static V4L2m2mContext* buf_to_m2mctx ( V4L2Buffer * buf )

inlinestatic

Definition at line 39 of file v4l2_buffers.c.

Referenced by ff_v4l2_buffer_enqueue(), ff_v4l2_buffer_initialize(), logger(), v4l2_buf_increase_ref(), v4l2_free_buffer(), and v4l2_get_timebase().

◆ logger()

static AVCodecContext* logger ( V4L2Buffer * buf )

inlinestatic

Definition at line 46 of file v4l2_buffers.c.

Referenced by ff_v4l2_buffer_buf_to_avframe(), and ff_v4l2_buffer_buf_to_avpkt().

◆ v4l2_get_timebase()

static AVRational v4l2_get_timebase ( V4L2Buffer * avbuf )

inlinestatic

Definition at line 51 of file v4l2_buffers.c.

Referenced by v4l2_get_pts(), and v4l2_set_pts().

◆ v4l2_set_pts()

static void v4l2_set_pts	(	V4L2Buffer *	out,
		int64_t	pts
	)

inlinestatic

Definition at line 60 of file v4l2_buffers.c.

Referenced by ff_v4l2_buffer_avframe_to_buf(), and ff_v4l2_buffer_avpkt_to_buf().

◆ v4l2_get_pts()

static int64_t v4l2_get_pts ( V4L2Buffer * avbuf )

inlinestatic

Definition at line 73 of file v4l2_buffers.c.

Referenced by ff_v4l2_buffer_buf_to_avframe(), and ff_v4l2_buffer_buf_to_avpkt().

◆ v4l2_get_color_primaries()

static enum AVColorPrimaries v4l2_get_color_primaries ( V4L2Buffer * buf )

static

Definition at line 84 of file v4l2_buffers.c.

Referenced by ff_v4l2_buffer_buf_to_avframe().

◆ v4l2_get_color_range()

static enum AVColorRange v4l2_get_color_range ( V4L2Buffer * buf )

static

Definition at line 118 of file v4l2_buffers.c.

Referenced by ff_v4l2_buffer_buf_to_avframe().

◆ v4l2_get_color_space()

static enum AVColorSpace v4l2_get_color_space ( V4L2Buffer * buf )

static

Definition at line 136 of file v4l2_buffers.c.

Referenced by ff_v4l2_buffer_buf_to_avframe().

◆ v4l2_get_color_trc()

static enum AVColorTransferCharacteristic v4l2_get_color_trc ( V4L2Buffer * buf )

static

Definition at line 168 of file v4l2_buffers.c.

Referenced by ff_v4l2_buffer_buf_to_avframe().

◆ v4l2_free_buffer()

static void v4l2_free_buffer	(	void *	opaque,
		uint8_t *	unused
	)

static

Definition at line 212 of file v4l2_buffers.c.

Referenced by v4l2_buf_to_bufref().

◆ v4l2_buf_increase_ref()

static int v4l2_buf_increase_ref ( V4L2Buffer * in )

static

Definition at line 236 of file v4l2_buffers.c.

Referenced by v4l2_buf_to_bufref().

◆ v4l2_buf_to_bufref()

static int v4l2_buf_to_bufref	(	V4L2Buffer *	in,
		int	plane,
		AVBufferRef **	buf
	)

static

Definition at line 256 of file v4l2_buffers.c.

Referenced by ff_v4l2_buffer_buf_to_avpkt(), and v4l2_buffer_buf_to_swframe().

◆ v4l2_bufref_to_buf()

static int v4l2_bufref_to_buf	(	V4L2Buffer *	out,
		int	plane,
		const uint8_t *	data,
		int	size,
		int	offset
	)

static

Definition at line 276 of file v4l2_buffers.c.

Referenced by ff_v4l2_buffer_avpkt_to_buf(), and v4l2_buffer_swframe_to_buf().

◆ v4l2_buffer_buf_to_swframe()

static int v4l2_buffer_buf_to_swframe	(	AVFrame *	frame,
		V4L2Buffer *	avbuf
	)

static

Definition at line 299 of file v4l2_buffers.c.

Referenced by ff_v4l2_buffer_buf_to_avframe().

◆ v4l2_buffer_swframe_to_buf()

static int v4l2_buffer_swframe_to_buf	(	const AVFrame *	frame,
		V4L2Buffer *	out
	)

static

Definition at line 340 of file v4l2_buffers.c.

Referenced by ff_v4l2_buffer_avframe_to_buf().

◆ 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 411 of file v4l2_buffers.c.

Referenced by ff_v4l2_context_enqueue_frame().

◆ 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 418 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 453 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 478 of file v4l2_buffers.c.

Referenced by ff_v4l2_context_enqueue_packet().

◆ 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 494 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 561 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().

Variable Documentation

◆ v4l2_timebase

AVRational v4l2_timebase = { 1, USEC_PER_SEC }

static

Definition at line 37 of file v4l2_buffers.c.

Referenced by v4l2_get_pts(), and v4l2_set_pts().

Macros

Functions

Variables

Macro Definition Documentation

◆ USEC_PER_SEC

Function Documentation

◆ buf_to_m2mctx()

◆ logger()

◆ v4l2_get_timebase()

◆ v4l2_set_pts()

◆ v4l2_get_pts()

◆ v4l2_get_color_primaries()

◆ v4l2_get_color_range()

◆ v4l2_get_color_space()

◆ v4l2_get_color_trc()

◆ v4l2_free_buffer()

◆ v4l2_buf_increase_ref()

◆ v4l2_buf_to_bufref()

◆ v4l2_bufref_to_buf()

◆ v4l2_buffer_buf_to_swframe()

◆ v4l2_buffer_swframe_to_buf()

◆ ff_v4l2_buffer_avframe_to_buf()

◆ ff_v4l2_buffer_buf_to_avframe()

◆ ff_v4l2_buffer_buf_to_avpkt()

◆ ff_v4l2_buffer_avpkt_to_buf()

◆ ff_v4l2_buffer_initialize()

◆ ff_v4l2_buffer_enqueue()

Variable Documentation

◆ v4l2_timebase