v4l2_m2m.c File Reference

#include <linux/videodev2.h>
#include <sys/ioctl.h>
#include <sys/mman.h>
#include <unistd.h>
#include <dirent.h>
#include <fcntl.h>
#include "libavcodec/avcodec.h"
#include "libavcodec/internal.h"
#include "libavutil/pixdesc.h"
#include "libavutil/imgutils.h"
#include "libavutil/pixfmt.h"
#include "v4l2_context.h"
#include "v4l2_fmt.h"
#include "v4l2_m2m.h"

Go to the source code of this file.

Functions
static int	v4l2_splane_video (struct v4l2_capability *cap)
static int	v4l2_mplane_video (struct v4l2_capability *cap)
static int	v4l2_prepare_contexts (V4L2m2mContext *s)
static int	v4l2_probe_driver (V4L2m2mContext *s)
static int	v4l2_configure_contexts (V4L2m2mContext *s)
int	ff_v4l2_m2m_codec_reinit (V4L2m2mContext *s)
	Reinitializes the V4L2m2mContext when the driver cant continue processing with the capture parameters. More...
int	ff_v4l2_m2m_codec_full_reinit (V4L2m2mContext *s)
	Reinitializes the V4L2m2mContext when the driver cant continue processing with the any of the current V4L2Contexts (ie, changes in output and capture). More...
static void	v4l2_m2m_destroy_context (void *opaque, uint8_t *context)
int	ff_v4l2_m2m_codec_end (AVCodecContext *avctx)
	Releases all the codec resources if all AVBufferRefs have been returned to the ctx. More...
int	ff_v4l2_m2m_codec_init (AVCodecContext *avctx)
	Probes the video nodes looking for the required codec capabilities. More...
int	ff_v4l2_m2m_create_context (AVCodecContext *avctx, V4L2m2mContext **s)
	Allocate a new context and references for a V4L2 M2M instance. More...

Function Documentation

v4l2_splane_video()

static int v4l2_splane_video ( struct v4l2_capability *  cap )

inlinestatic

Definition at line 39 of file v4l2_m2m.c.

Referenced by v4l2_prepare_contexts().

v4l2_mplane_video()

static int v4l2_mplane_video ( struct v4l2_capability *  cap )

inlinestatic

Definition at line 51 of file v4l2_m2m.c.

Referenced by v4l2_prepare_contexts().

v4l2_prepare_contexts()

static int v4l2_prepare_contexts ( V4L2m2mContext *  s )

static

Definition at line 63 of file v4l2_m2m.c.

Referenced by v4l2_configure_contexts(), and v4l2_probe_driver().

v4l2_probe_driver()

static int v4l2_probe_driver ( V4L2m2mContext *  s )

static

Definition at line 96 of file v4l2_m2m.c.

Referenced by ff_v4l2_m2m_codec_init().

v4l2_configure_contexts()

static int v4l2_configure_contexts ( V4L2m2mContext *  s )

static

Definition at line 131 of file v4l2_m2m.c.

Referenced by ff_v4l2_m2m_codec_init().

ff_v4l2_m2m_codec_reinit()

int ff_v4l2_m2m_codec_reinit

(

V4L2m2mContext *

ctx

)

Reinitializes the V4L2m2mContext when the driver cant continue processing with the capture parameters.

Parameters

[in]

ctx

The V4L2m2mContext instantiated by the encoder/decoder.

Returns

0 in case of success, negative number otherwise

Definition at line 189 of file v4l2_m2m.c.

Referenced by v4l2_handle_event().

ff_v4l2_m2m_codec_full_reinit()

int ff_v4l2_m2m_codec_full_reinit

(

V4L2m2mContext *

ctx

)

Reinitializes the V4L2m2mContext when the driver cant continue processing with the any of the current V4L2Contexts (ie, changes in output and capture).

Parameters

[in]

ctx

The V4L2m2mContext instantiated by the encoder/decoder.

Returns

0 in case of success, negative number otherwise

Definition at line 231 of file v4l2_m2m.c.

Referenced by v4l2_handle_event().

v4l2_m2m_destroy_context()

static void v4l2_m2m_destroy_context ( void *  opaque, uint8_t *  context  )

static

Definition at line 307 of file v4l2_m2m.c.

Referenced by ff_v4l2_m2m_create_context().

ff_v4l2_m2m_codec_end()

int ff_v4l2_m2m_codec_end

(

AVCodecContext *

avctx

)

Releases all the codec resources if all AVBufferRefs have been returned to the ctx.

Otherwise keep the driver open.

Parameters

[in]

The

AVCodecContext instantiated by the encoder/decoder.

Returns

0

Definition at line 319 of file v4l2_m2m.c.

ff_v4l2_m2m_codec_init()

int ff_v4l2_m2m_codec_init

(

AVCodecContext *

avctx

)

Probes the video nodes looking for the required codec capabilities.

Parameters

[in]

ctx

The AVCodecContext instantiated by the encoder/decoder.

Returns

0 if a driver is found, a negative number otherwise.

Definition at line 341 of file v4l2_m2m.c.

Referenced by v4l2_decode_init(), and v4l2_encode_init().

ff_v4l2_m2m_create_context()

int ff_v4l2_m2m_create_context	(	AVCodecContext *	avctx,
		V4L2m2mContext **	s
	)

Allocate a new context and references for a V4L2 M2M instance.

Parameters

[in]	ctx	The AVCodecContext instantiated by the encoder/decoder.
[out]	ctx	The V4L2m2mContext.

Returns

0 in success, a negative error code otherwise.

Definition at line 382 of file v4l2_m2m.c.

Referenced by v4l2_decode_init(), and v4l2_encode_init().