#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 "libavcodec/internal.h"
#include "v4l2_buffers.h"
#include "v4l2_fmt.h"
#include "v4l2_m2m.h"

Data Structures
struct	v4l2_format_update

Functions
static V4L2m2mContext *	ctx_to_m2mctx (V4L2Context *ctx)

static AVCodecContext *	logger (V4L2Context *ctx)

static unsigned int	v4l2_get_width (struct v4l2_format *fmt)

static unsigned int	v4l2_get_height (struct v4l2_format *fmt)

static unsigned int	v4l2_resolution_changed (V4L2Context ctx, struct v4l2_format fmt2)

static int	v4l2_type_supported (V4L2Context *ctx)

static int	v4l2_get_framesize_compressed (V4L2Context *ctx, int width, int height)

static void	v4l2_save_to_context (V4L2Context ctx, struct v4l2_format_update fmt)

static int	v4l2_handle_event (V4L2Context *ctx)
	returns 1 if reinit was successful, negative if it failed returns 0 if reinit was not executed More...

static int	v4l2_stop_decode (V4L2Context *ctx)

static int	v4l2_stop_encode (V4L2Context *ctx)

static V4L2Buffer *	v4l2_dequeue_v4l2buf (V4L2Context *ctx, int timeout)

static V4L2Buffer *	v4l2_getfree_v4l2buf (V4L2Context *ctx)

static int	v4l2_release_buffers (V4L2Context *ctx)

static int	v4l2_try_raw_format (V4L2Context *ctx, enum AVPixelFormat pixfmt)

static int	v4l2_get_raw_format (V4L2Context ctx, enum AVPixelFormat p)

static int	v4l2_get_coded_format (V4L2Context ctx, uint32_t p)

int	ff_v4l2_context_set_status (V4L2Context *ctx, int cmd)
	Sets the status of a V4L2Context. More...

int	ff_v4l2_context_enqueue_frame (V4L2Context ctx, const AVFrame frame)
	Enqueues a buffer to a V4L2Context from an AVFrame. More...

int	ff_v4l2_context_enqueue_packet (V4L2Context ctx, const AVPacket pkt)
	Enqueues a buffer to a V4L2Context from an AVPacket. More...

int	ff_v4l2_context_dequeue_frame (V4L2Context ctx, AVFrame frame)
	Dequeues a buffer from a V4L2Context to an AVFrame. More...

int	ff_v4l2_context_dequeue_packet (V4L2Context ctx, AVPacket pkt)
	Dequeues a buffer from a V4L2Context to an AVPacket. More...

int	ff_v4l2_context_get_format (V4L2Context *ctx)
	Queries the driver for a valid v4l2 format and copies it to the context. More...

int	ff_v4l2_context_set_format (V4L2Context *ctx)
	Sets the V4L2Context format in the v4l2 driver. More...

void	ff_v4l2_context_release (V4L2Context *ctx)
	Releases a V4L2Context. More...

int	ff_v4l2_context_init (V4L2Context *ctx)
	Initializes a V4L2Context. More...

Function Documentation

static V4L2m2mContext* ctx_to_m2mctx ( V4L2Context * ctx )

inlinestatic

static AVCodecContext* logger ( V4L2Context * ctx )

inlinestatic

Definition at line 51 of file v4l2_context.c.

Referenced by ff_v4l2_context_enqueue_frame(), ff_v4l2_context_enqueue_packet(), ff_v4l2_context_init(), ff_v4l2_context_release(), v4l2_dequeue_v4l2buf(), v4l2_handle_event(), v4l2_release_buffers(), and v4l2_resolution_changed().

static unsigned int v4l2_get_width ( struct v4l2_format * fmt )

inlinestatic

Definition at line 56 of file v4l2_context.c.

Referenced by ff_v4l2_context_init(), v4l2_handle_event(), and v4l2_resolution_changed().

static unsigned int v4l2_get_height ( struct v4l2_format * fmt )

inlinestatic

Definition at line 61 of file v4l2_context.c.

Referenced by ff_v4l2_context_init(), v4l2_handle_event(), and v4l2_resolution_changed().

static unsigned int v4l2_resolution_changed	(	V4L2Context *	ctx,
		struct v4l2_format *	fmt2
	)

inlinestatic

Definition at line 66 of file v4l2_context.c.

Referenced by v4l2_handle_event().

static int v4l2_type_supported ( V4L2Context * ctx )

inlinestatic

Definition at line 85 of file v4l2_context.c.

Referenced by ff_v4l2_context_init().

static int v4l2_get_framesize_compressed	(	V4L2Context *	ctx,
		int	width,
		int	height
	)

inlinestatic

Definition at line 93 of file v4l2_context.c.

Referenced by v4l2_save_to_context().

static void v4l2_save_to_context	(	V4L2Context *	ctx,
		struct v4l2_format_update *	fmt
	)

inlinestatic

Definition at line 107 of file v4l2_context.c.

Referenced by ff_v4l2_context_get_format().

static int v4l2_handle_event ( V4L2Context * ctx )

static

returns 1 if reinit was successful, negative if it failed returns 0 if reinit was not executed

Definition at line 142 of file v4l2_context.c.

Referenced by v4l2_dequeue_v4l2buf().

static int v4l2_stop_decode ( V4L2Context * ctx )

static

Definition at line 216 of file v4l2_context.c.

Referenced by ff_v4l2_context_enqueue_packet().

static int v4l2_stop_encode ( V4L2Context * ctx )

static

Definition at line 233 of file v4l2_context.c.

Referenced by ff_v4l2_context_enqueue_frame().

static V4L2Buffer* v4l2_dequeue_v4l2buf	(	V4L2Context *	ctx,
		int	timeout
	)

static

Definition at line 250 of file v4l2_context.c.

Referenced by ff_v4l2_context_dequeue_frame(), ff_v4l2_context_dequeue_packet(), and v4l2_getfree_v4l2buf().

static V4L2Buffer* v4l2_getfree_v4l2buf ( V4L2Context * ctx )

static

Definition at line 347 of file v4l2_context.c.

Referenced by ff_v4l2_context_enqueue_frame(), and ff_v4l2_context_enqueue_packet().

static int v4l2_release_buffers ( V4L2Context * ctx )

static

Definition at line 366 of file v4l2_context.c.

Referenced by ff_v4l2_context_release().

static int v4l2_try_raw_format	(	V4L2Context *	ctx,
		enum AVPixelFormat	pixfmt
	)

inlinestatic

Definition at line 389 of file v4l2_context.c.

Referenced by v4l2_get_raw_format().

static int v4l2_get_raw_format	(	V4L2Context *	ctx,
		enum AVPixelFormat *	p
	)

static

Definition at line 413 of file v4l2_context.c.

Referenced by ff_v4l2_context_get_format().

static int v4l2_get_coded_format	(	V4L2Context *	ctx,
		uint32_t *	p
	)

static

Definition at line 450 of file v4l2_context.c.

Referenced by ff_v4l2_context_get_format().

int ff_v4l2_context_set_status	(	V4L2Context *	ctx,
		int	cmd
	)

Sets the status of a V4L2Context.

Parameters

[in]	ctx	A pointer to a V4L2Context.
[in]	cmd	The status to set (VIDIOC_STREAMON or VIDIOC_STREAMOFF). Warning: If VIDIOC_STREAMOFF is sent to a buffer context that still has some frames buffered, those frames will be dropped.

Returns: 0 in case of success, a negative value representing the error otherwise.

Definition at line 487 of file v4l2_context.c.

Referenced by ff_v4l2_m2m_codec_end(), ff_v4l2_m2m_codec_reinit(), v4l2_receive_packet(), v4l2_stop_decode(), v4l2_stop_encode(), and v4l2_try_start().

int ff_v4l2_context_enqueue_frame	(	V4L2Context *	ctx,
		const AVFrame *	f
	)

Enqueues a buffer to a V4L2Context from an AVFrame.

The frame must be non NULL.

Parameters

[in]	ctx	The V4L2Context to enqueue to.
[in]	f	A pointer to an AVFrame to enqueue.

Returns: 0 in case of success, a negative error otherwise.

Definition at line 501 of file v4l2_context.c.

Referenced by v4l2_send_frame().

int ff_v4l2_context_enqueue_packet	(	V4L2Context *	ctx,
		const AVPacket *	pkt
	)

Enqueues a buffer to a V4L2Context from an AVPacket.

The packet must be non NULL. When the size of the pkt is null, the buffer is not queued but a V4L2_DEC_CMD_STOP command is sent instead to the driver.

Parameters

[in]	ctx	The V4L2Context to enqueue to.
[in]	pkt	A pointer to an AVPacket.

Returns: 0 in case of success, a negative error otherwise.

Definition at line 526 of file v4l2_context.c.

Referenced by v4l2_receive_frame().

int ff_v4l2_context_dequeue_frame	(	V4L2Context *	ctx,
		AVFrame *	f
	)

Dequeues a buffer from a V4L2Context to an AVFrame.

The frame must be non NULL.

Parameters

[in]	ctx	The V4L2Context to dequeue from.
[in,out]	f	The AVFrame to dequeue to.

Returns: 0 in case of success, AVERROR(EAGAIN) if no buffer was ready, another negative error in case of error.

Definition at line 551 of file v4l2_context.c.

Referenced by v4l2_receive_frame().

int ff_v4l2_context_dequeue_packet	(	V4L2Context *	ctx,
		AVPacket *	pkt
	)

Dequeues a buffer from a V4L2Context to an AVPacket.

The pkt must be non NULL.

Parameters

[in]	ctx	The V4L2Context to dequeue from.
[in,out]	pkt	The AVPacket to dequeue to.

Returns: 0 in case of success, AVERROR(EAGAIN) if no buffer was ready, another negative error in case of error.

Definition at line 573 of file v4l2_context.c.

Referenced by v4l2_receive_packet().

int ff_v4l2_context_get_format ( V4L2Context * ctx )

Queries the driver for a valid v4l2 format and copies it to the context.

Parameters

[in] ctx A pointer to a V4L2Context. See V4L2Context description for required variables.

Returns: 0 in case of success, a negative value representing the error otherwise.

Definition at line 595 of file v4l2_context.c.

Referenced by ff_v4l2_m2m_codec_full_reinit(), ff_v4l2_m2m_codec_reinit(), and v4l2_probe_driver().

int ff_v4l2_context_set_format ( V4L2Context * ctx )

Sets the V4L2Context format in the v4l2 driver.

Parameters

[in] ctx A pointer to a V4L2Context. See V4L2Context description for required variables.

Returns: 0 in case of success, a negative value representing the error otherwise.

Definition at line 622 of file v4l2_context.c.

Referenced by ff_v4l2_m2m_codec_full_reinit(), ff_v4l2_m2m_codec_reinit(), and v4l2_configure_contexts().

void ff_v4l2_context_release ( V4L2Context * ctx )

Releases a V4L2Context.

Parameters

[in] ctx A pointer to a V4L2Context. The caller is reponsible for freeing it. It must not be used after calling this function.

Definition at line 627 of file v4l2_context.c.

Referenced by ff_v4l2_m2m_codec_end(), and ff_v4l2_m2m_codec_reinit().

int ff_v4l2_context_init ( V4L2Context * ctx )

Initializes a V4L2Context.

Parameters

[in] ctx A pointer to a V4L2Context. See V4L2Context description for required variables.

Returns: 0 in case of success, a negative value representing the error otherwise.

Definition at line 642 of file v4l2_context.c.

Referenced by ff_v4l2_m2m_codec_full_reinit(), v4l2_configure_contexts(), and v4l2_try_start().

Data Structures

Functions

Function Documentation