libxevd.c File Reference

#include <stddef.h>
#include <xevd.h>
#include "libavutil/internal.h"
#include "libavutil/common.h"
#include "libavutil/pixdesc.h"
#include "libavutil/pixfmt.h"
#include "libavutil/imgutils.h"
#include "libavutil/cpu.h"
#include "avcodec.h"
#include "codec_internal.h"
#include "profiles.h"
#include "decode.h"

Go to the source code of this file.

Data Structures
struct	XevdContext
	The structure stores all the states associated with the instance of Xeve MPEG-5 EVC decoder. More...

Macros
#define	XEVD_PARAM_BAD_NAME   -1
#define	XEVD_PARAM_BAD_VALUE   -2
#define	EVC_NAL_HEADER_SIZE   2 /* byte */

Functions
static void	get_conf (AVCodecContext *avctx, XEVD_CDSC *cdsc)
	The function populates the XEVD_CDSC structure. More...
static uint32_t	read_nal_unit_length (const uint8_t *bs, int bs_size, AVCodecContext *avctx)
	Read NAL unit length. More...
static int	export_stream_params (const XevdContext *xectx, AVCodecContext *avctx)
static int	libxevd_image_copy (struct AVCodecContext *avctx, XEVD_IMGB *imgb, struct AVFrame *frame)
	Copy image in imgb to frame. More...
static av_cold int	libxevd_init (AVCodecContext *avctx)
	Initialize decoder Create a decoder instance and allocate all the needed resources. More...
static int	libxevd_return_frame (AVCodecContext *avctx, AVFrame *frame, XEVD_IMGB *imgb, AVPacket **pkt_au)
static int	libxevd_receive_frame (AVCodecContext *avctx, AVFrame *frame)
	Decode frame with decoupled packet/frame dataflow. More...
static av_cold int	libxevd_close (AVCodecContext *avctx)
	Destroy decoder. More...

Variables
const FFCodec	ff_libxevd_decoder

Macro Definition Documentation

XEVD_PARAM_BAD_NAME

#define XEVD_PARAM_BAD_NAME   -1

Definition at line 40 of file libxevd.c.

XEVD_PARAM_BAD_VALUE

#define XEVD_PARAM_BAD_VALUE   -2

Definition at line 41 of file libxevd.c.

EVC_NAL_HEADER_SIZE

#define EVC_NAL_HEADER_SIZE   2 /* byte */

Definition at line 43 of file libxevd.c.

Function Documentation

get_conf()

static void get_conf ( AVCodecContext *  avctx, XEVD_CDSC *  cdsc  )

static

The function populates the XEVD_CDSC structure.

XEVD_CDSC contains all decoder parameters that should be initialized before its use.

Parameters

[in]	avctx	codec context
[out]	cdsc	contains all decoder parameters that should be initialized before its use

Definition at line 67 of file libxevd.c.

Referenced by libxevd_init().

read_nal_unit_length()

static uint32_t read_nal_unit_length ( const uint8_t *  bs, int  bs_size, AVCodecContext *  avctx  )

static

Read NAL unit length.

Parameters

bs	input data (bitstream)

Returns

the length of NAL unit on success, 0 value on failure

Definition at line 88 of file libxevd.c.

Referenced by libxevd_receive_frame().

export_stream_params()

static int export_stream_params ( const XevdContext *  xectx, AVCodecContext *  avctx  )

static

Parameters

[in]	xectx	the structure that stores all the state associated with the instance of Xeve MPEG-5 EVC decoder
[out]	avctx	codec context

Returns

0 on success, negative value on failure

Definition at line 115 of file libxevd.c.

Referenced by libxevd_receive_frame().

libxevd_image_copy()

static int libxevd_image_copy ( struct AVCodecContext *  avctx, XEVD_IMGB *  imgb, struct AVFrame *  frame  )

static

Copy image in imgb to frame.

Parameters

	avctx	codec context
[in]	imgb
[out]	frame

Returns

0 on success, negative value on failure

Definition at line 190 of file libxevd.c.

Referenced by libxevd_return_frame().

libxevd_init()

static av_cold int libxevd_init ( AVCodecContext *  avctx )

static

Initialize decoder Create a decoder instance and allocate all the needed resources.

Parameters

avctx

codec context

Returns

0 on success, negative error code on failure

Definition at line 223 of file libxevd.c.

libxevd_return_frame()

static int libxevd_return_frame ( AVCodecContext *  avctx, AVFrame *  frame, XEVD_IMGB *  imgb, AVPacket **  pkt_au  )

static

Definition at line 248 of file libxevd.c.

Referenced by libxevd_receive_frame().

libxevd_receive_frame()

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

static

Decode frame with decoupled packet/frame dataflow.

Parameters

	avctx	codec context
[out]	frame	decoded frame

Returns

0 on success, negative error code on failure

Definition at line 315 of file libxevd.c.

libxevd_close()

static av_cold int libxevd_close ( AVCodecContext *  avctx )

static

Destroy decoder.

Parameters

avctx

codec context

Returns

0 on success

Definition at line 453 of file libxevd.c.

Variable Documentation

ff_libxevd_decoder

const FFCodec ff_libxevd_decoder

Initial value:

= {
    .p.name             = "evc",
    CODEC_LONG_NAME("EVC / MPEG-5 Essential Video Coding (EVC)"),
    .p.type             = AVMEDIA_TYPE_VIDEO,
    .p.id               = AV_CODEC_ID_EVC,
    .init               = libxevd_init,
    FF_CODEC_RECEIVE_FRAME_CB(libxevd_receive_frame),
    .close              = libxevd_close,
    .priv_data_size     = sizeof(XevdContext),
    .p.capabilities     = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_DELAY |
                          AV_CODEC_CAP_OTHER_THREADS | AV_CODEC_CAP_AVOID_PROBING,
    .p.profiles         = NULL_IF_CONFIG_SMALL(ff_evc_profiles),
    .p.wrapper_name     = "libxevd",
    .caps_internal      = FF_CODEC_CAP_INIT_CLEANUP | FF_CODEC_CAP_NOT_INIT_THREADSAFE |
                          FF_CODEC_CAP_SETS_FRAME_PROPS,
}

Definition at line 467 of file libxevd.c.