v4l2_m2m_enc.c File Reference

#include <linux/videodev2.h>
#include <sys/ioctl.h>
#include <search.h>
#include "libavcodec/avcodec.h"
#include "libavutil/pixdesc.h"
#include "libavutil/pixfmt.h"
#include "libavutil/opt.h"
#include "v4l2_context.h"
#include "v4l2_m2m.h"

Go to the source code of this file.

Macros
#define	MPEG_CID(x)   V4L2_CID_MPEG_VIDEO_##x
#define	MPEG_VIDEO(x)   V4L2_MPEG_VIDEO_##x
#define	OFFSET(x)   offsetof(V4L2m2mPriv, x)
#define	FLAGS   AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM
#define	M2MENC(NAME, LONGNAME, CODEC)

Functions
static void	v4l2_set_timeperframe (V4L2m2mContext *s, unsigned int num, unsigned int den)
static void	v4l2_set_ext_ctrl (V4L2m2mContext *s, unsigned int id, signed int value, const char *name)
static int	v4l2_get_ext_ctrl (V4L2m2mContext *s, unsigned int id, signed int *value, const char *name)
static unsigned int	v4l2_h264_profile_from_ff (int p)
static int	v4l2_mpeg4_profile_from_ff (int p)
static int	v4l2_check_b_frame_support (V4L2m2mContext *s)
static int	v4l2_prepare_encoder (V4L2m2mContext *s)
static int	v4l2_send_frame (AVCodecContext *avctx, const AVFrame *frame)
static int	v4l2_receive_packet (AVCodecContext *avctx, AVPacket *avpkt)
static av_cold int	v4l2_encode_init (AVCodecContext *avctx)
	M2MENC (mpeg4,"MPEG4", AV_CODEC_ID_MPEG4)
	M2MENC (h263, "H.263", AV_CODEC_ID_H263)
	M2MENC (h264, "H.264", AV_CODEC_ID_H264)
	M2MENC (hevc, "HEVC", AV_CODEC_ID_HEVC)
	M2MENC (vp8, "VP8", AV_CODEC_ID_VP8)

Variables
static const AVOption	options []

Macro Definition Documentation

MPEG_CID

#define MPEG_CID

(

x

)

V4L2_CID_MPEG_VIDEO_##x

Definition at line 34 of file v4l2_m2m_enc.c.

Referenced by v4l2_check_b_frame_support(), and v4l2_prepare_encoder().

MPEG_VIDEO

#define MPEG_VIDEO

(

x

)

V4L2_MPEG_VIDEO_##x

Definition at line 35 of file v4l2_m2m_enc.c.

Referenced by v4l2_h264_profile_from_ff(), v4l2_mpeg4_profile_from_ff(), and v4l2_prepare_encoder().

OFFSET

#define OFFSET

(

x

)

offsetof(V4L2m2mPriv, x)

Definition at line 315 of file v4l2_m2m_enc.c.

FLAGS

#define FLAGS   AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM

Definition at line 316 of file v4l2_m2m_enc.c.

M2MENC

#define M2MENC	(		NAME,
			LONGNAME,
			CODEC
	)

Value:

static const AVClass v4l2_m2m_ ## NAME ## _enc_class = {\
    .class_name = #NAME "_v4l2_m2m_encoder",\
    .item_name  = av_default_item_name,\
    .option     = options,\
    .version    = LIBAVUTIL_VERSION_INT,\
};\
\
AVCodec ff_ ## NAME ## _v4l2m2m_encoder = { \
    .name           = #NAME "_v4l2m2m" ,\
    .long_name      = NULL_IF_CONFIG_SMALL("V4L2 mem2mem " LONGNAME " encoder wrapper"),\
    .type           = AVMEDIA_TYPE_VIDEO,\
    .id             = CODEC ,\
    .priv_data_size = sizeof(V4L2m2mPriv),\
    .priv_class     = &v4l2_m2m_ ## NAME ##_enc_class,\
    .init           = v4l2_encode_init,\
    .send_frame     = v4l2_send_frame,\
    .receive_packet = v4l2_receive_packet,\
    .close          = ff_v4l2_m2m_codec_end,\
    .capabilities   = AV_CODEC_CAP_HARDWARE | AV_CODEC_CAP_DELAY, \
    .wrapper_name   = "v4l2m2m", \
};

Definition at line 325 of file v4l2_m2m_enc.c.

Function Documentation

v4l2_set_timeperframe()

static void v4l2_set_timeperframe ( V4L2m2mContext *  s, unsigned int  num, unsigned int  den  )

inlinestatic

Definition at line 37 of file v4l2_m2m_enc.c.

Referenced by v4l2_prepare_encoder().

v4l2_set_ext_ctrl()

static void v4l2_set_ext_ctrl ( V4L2m2mContext *  s, unsigned int  id, signed int  value, const char *  name  )

inlinestatic

Definition at line 49 of file v4l2_m2m_enc.c.

Referenced by v4l2_check_b_frame_support(), and v4l2_prepare_encoder().

v4l2_get_ext_ctrl()

static int v4l2_get_ext_ctrl ( V4L2m2mContext *  s, unsigned int  id, signed int *  value, const char *  name  )

inlinestatic

Definition at line 69 of file v4l2_m2m_enc.c.

Referenced by v4l2_check_b_frame_support().

v4l2_h264_profile_from_ff()

static unsigned int v4l2_h264_profile_from_ff ( int  p )

inlinestatic

Definition at line 94 of file v4l2_m2m_enc.c.

Referenced by v4l2_prepare_encoder().

v4l2_mpeg4_profile_from_ff()

static int v4l2_mpeg4_profile_from_ff ( int  p )

inlinestatic

Definition at line 121 of file v4l2_m2m_enc.c.

Referenced by v4l2_prepare_encoder().

v4l2_check_b_frame_support()

static int v4l2_check_b_frame_support ( V4L2m2mContext *  s )

static

Definition at line 142 of file v4l2_m2m_enc.c.

Referenced by v4l2_prepare_encoder().

v4l2_prepare_encoder()

static int v4l2_prepare_encoder ( V4L2m2mContext *  s )

static

requirements

settingss

Definition at line 157 of file v4l2_m2m_enc.c.

Referenced by v4l2_encode_init().

v4l2_send_frame()

static int v4l2_send_frame ( AVCodecContext *  avctx, const AVFrame *  frame  )

static

Definition at line 243 of file v4l2_m2m_enc.c.

v4l2_receive_packet()

static int v4l2_receive_packet ( AVCodecContext *  avctx, AVPacket *  avpkt  )

static

Definition at line 251 of file v4l2_m2m_enc.c.

v4l2_encode_init()

static av_cold int v4l2_encode_init ( AVCodecContext *  avctx )

static

Definition at line 281 of file v4l2_m2m_enc.c.

M2MENC() [1/5]

M2MENC	(	mpeg4	,
		"MPEG4"	,
		AV_CODEC_ID_MPEG4
	)

M2MENC() [2/5]

M2MENC	(	h263	,
		"H.263"	,
		AV_CODEC_ID_H263
	)

M2MENC() [3/5]

M2MENC	(	h264	,
		"H.264"	,
		AV_CODEC_ID_H264
	)

M2MENC() [4/5]

M2MENC	(	hevc	,
		"HEVC"	,
		AV_CODEC_ID_HEVC
	)

M2MENC() [5/5]

M2MENC	(	vp8	,
		"VP8"	,
		AV_CODEC_ID_VP8
	)

Variable Documentation

options

const AVOption options[]

static

Initial value:

= {
    V4L_M2M_DEFAULT_OPTS,
    { "num_capture_buffers", "Number of buffers in the capture context",
        OFFSET(num_capture_buffers), AV_OPT_TYPE_INT, {.i64 = 4 }, 4, INT_MAX, FLAGS },
    { NULL },
}

Definition at line 318 of file v4l2_m2m_enc.c.