v4l2_m2m_dec.c File Reference

#include <linux/videodev2.h>
#include <sys/ioctl.h>
#include "libavutil/pixfmt.h"
#include "libavutil/pixdesc.h"
#include "libavutil/opt.h"
#include "libavcodec/avcodec.h"
#include "libavcodec/decode.h"
#include "v4l2_context.h"
#include "v4l2_m2m.h"
#include "v4l2_fmt.h"

Go to the source code of this file.

Macros
#define	OFFSET(x)   offsetof(V4L2m2mPriv, x)
#define	FLAGS   AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_DECODING_PARAM
#define	M2MDEC(NAME, LONGNAME, CODEC, bsf_name)

Functions
static int	v4l2_try_start (AVCodecContext *avctx)
static int	v4l2_prepare_decoder (V4L2m2mContext *s)
static int	v4l2_receive_frame (AVCodecContext *avctx, AVFrame *frame)
static av_cold int	v4l2_decode_init (AVCodecContext *avctx)
	M2MDEC (h264, "H.264", AV_CODEC_ID_H264, "h264_mp4toannexb")
	M2MDEC (hevc, "HEVC", AV_CODEC_ID_HEVC, "hevc_mp4toannexb")
	M2MDEC (mpeg1, "MPEG1", AV_CODEC_ID_MPEG1VIDEO, NULL)
	M2MDEC (mpeg2, "MPEG2", AV_CODEC_ID_MPEG2VIDEO, NULL)
	M2MDEC (mpeg4, "MPEG4", AV_CODEC_ID_MPEG4, NULL)
	M2MDEC (h263, "H.263", AV_CODEC_ID_H263, NULL)
	M2MDEC (vc1, "VC1", AV_CODEC_ID_VC1, NULL)
	M2MDEC (vp8, "VP8", AV_CODEC_ID_VP8, NULL)
	M2MDEC (vp9, "VP9", AV_CODEC_ID_VP9, NULL)

Variables
static const AVOption	options []

Macro Definition Documentation

OFFSET

#define OFFSET

(

x

)

offsetof(V4L2m2mPriv, x)

Definition at line 202 of file v4l2_m2m_dec.c.

FLAGS

#define FLAGS   AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_DECODING_PARAM

Definition at line 203 of file v4l2_m2m_dec.c.

M2MDEC

#define M2MDEC	(		NAME,
			LONGNAME,
			CODEC,
			bsf_name
	)

Value:

static const AVClass v4l2_m2m_ ## NAME ## _dec_class = {\
    .class_name = #NAME "_v4l2_m2m_decoder",\
    .item_name  = av_default_item_name,\
    .option     = options,\
    .version    = LIBAVUTIL_VERSION_INT,\
};\
\
AVCodec ff_ ## NAME ## _v4l2m2m_decoder = { \
    .name           = #NAME "_v4l2m2m" ,\
    .long_name      = NULL_IF_CONFIG_SMALL("V4L2 mem2mem " LONGNAME " decoder wrapper"),\
    .type           = AVMEDIA_TYPE_VIDEO,\
    .id             = CODEC ,\
    .priv_data_size = sizeof(V4L2m2mPriv),\
    .priv_class     = &v4l2_m2m_ ## NAME ## _dec_class,\
    .init           = v4l2_decode_init,\
    .receive_frame  = v4l2_receive_frame,\
    .close          = ff_v4l2_m2m_codec_end,\
    .bsfs           = bsf_name, \
    .capabilities   = AV_CODEC_CAP_HARDWARE | AV_CODEC_CAP_DELAY | \
                      AV_CODEC_CAP_AVOID_PROBING, \
    .wrapper_name   = "v4l2m2m", \
};

Definition at line 212 of file v4l2_m2m_dec.c.

Function Documentation

v4l2_try_start()

static int v4l2_try_start ( AVCodecContext *  avctx )

static

Definition at line 36 of file v4l2_m2m_dec.c.

Referenced by v4l2_receive_frame().

v4l2_prepare_decoder()

static int v4l2_prepare_decoder ( V4L2m2mContext *  s )

static

requirements

Definition at line 104 of file v4l2_m2m_dec.c.

Referenced by v4l2_decode_init().

v4l2_receive_frame()

static int v4l2_receive_frame ( AVCodecContext *  avctx, AVFrame *  frame  )

static

Definition at line 128 of file v4l2_m2m_dec.c.

v4l2_decode_init()

static av_cold int v4l2_decode_init ( AVCodecContext *  avctx )

static

Definition at line 163 of file v4l2_m2m_dec.c.

M2MDEC() [1/9]

M2MDEC	(	h264	,
		"H.264"	,
		AV_CODEC_ID_H264	,
		"h264_mp4toannexb"
	)

M2MDEC() [2/9]

M2MDEC	(	hevc	,
		"HEVC"	,
		AV_CODEC_ID_HEVC	,
		"hevc_mp4toannexb"
	)

M2MDEC() [3/9]

M2MDEC	(	mpeg1	,
		"MPEG1"	,
		AV_CODEC_ID_MPEG1VIDEO	,
		NULL
	)

M2MDEC() [4/9]

M2MDEC	(	mpeg2	,
		"MPEG2"	,
		AV_CODEC_ID_MPEG2VIDEO	,
		NULL
	)

M2MDEC() [5/9]

M2MDEC	(	mpeg4	,
		"MPEG4"	,
		AV_CODEC_ID_MPEG4	,
		NULL
	)

M2MDEC() [6/9]

M2MDEC	(	h263	,
		"H.263"	,
		AV_CODEC_ID_H263	,
		NULL
	)

M2MDEC() [7/9]

M2MDEC	(	vc1	,
		"VC1"	,
		AV_CODEC_ID_VC1	,
		NULL
	)

M2MDEC() [8/9]

M2MDEC	(	vp8	,
		"VP8"	,
		AV_CODEC_ID_VP8	,
		NULL
	)

M2MDEC() [9/9]

M2MDEC	(	vp9	,
		"VP9"	,
		AV_CODEC_ID_VP9	,
		NULL
	)

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 = 20}, 20, INT_MAX, FLAGS },
    { NULL},
}

Definition at line 205 of file v4l2_m2m_dec.c.