extract_extradata.c File Reference

#include <stdint.h>
#include "libavutil/log.h"
#include "libavutil/mem.h"
#include "libavutil/opt.h"
#include "libavcodec/av1.h"
#include "libavcodec/av1_parse.h"
#include "libavcodec/bsf.h"
#include "libavcodec/bsf_internal.h"
#include "libavcodec/bytestream.h"
#include "libavcodec/h2645_parse.h"
#include "libavcodec/h264.h"
#include "libavcodec/lcevc.h"
#include "libavcodec/lcevc_parse.h"
#include "libavcodec/startcode.h"
#include "libavcodec/vc1_common.h"
#include "libavcodec/vvc.h"
#include "libavcodec/hevc/hevc.h"

Go to the source code of this file.

Data Structures
struct	ExtractExtradataContext

Macros
#define	OFFSET(x)
#define	FLAGS   (AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_BSF_PARAM)

Functions
static int	val_in_array (const int *arr, size_t len, int val)
static int	metadata_is_global (const AV1OBU *obu)
static int	obu_is_global (const AV1OBU *obu)
static int	extract_extradata_av1 (AVBSFContext *ctx, AVPacket *pkt, uint8_t **data, int *size)
static int	extract_extradata_h2645 (AVBSFContext *ctx, AVPacket *pkt, uint8_t **data, int *size)
static int	process_lcevc_nalu (PutByteContext *extradata, PutByteContext *data, int *extradata_sizep, int *data_sizep, const H2645NAL *nal)
	Rewrite the NALu stripping the unneeded blocks.
static int	extract_extradata_lcevc (AVBSFContext *ctx, AVPacket *pkt, uint8_t **data, int *size)
static int	extract_extradata_vc1 (AVBSFContext *ctx, AVPacket *pkt, uint8_t **data, int *size)
static int	extract_extradata_mpeg12 (AVBSFContext *ctx, AVPacket *pkt, uint8_t **data, int *size)
static int	extract_extradata_mpeg4 (AVBSFContext *ctx, AVPacket *pkt, uint8_t **data, int *size)
static int	extract_extradata_init (AVBSFContext *ctx)
static int	extract_extradata_filter (AVBSFContext *ctx, AVPacket *pkt)
static void	extract_extradata_close (AVBSFContext *ctx)

Variables
struct {
enum AVCodecID   id
int(*   extract )(AVBSFContext *ctx, AVPacket       *pkt, uint8_t **data, int       *size)
}	extract_tab []
static enum AVCodecID	codec_ids []
static const AVOption	options []
static const AVClass	extract_extradata_class
const FFBitStreamFilter	ff_extract_extradata_bsf

Macro Definition Documentation

OFFSET

#define OFFSET

(

x

)

Value:

offsetof(ExtractExtradataContext, x)

Definition at line 675 of file extract_extradata.c.

FLAGS

#define FLAGS   (AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_BSF_PARAM)

Definition at line 676 of file extract_extradata.c.

Function Documentation

val_in_array()

static int val_in_array ( const int * arr, size_t len, int val )

static

Definition at line 56 of file extract_extradata.c.

Referenced by extract_extradata_h2645(), extract_extradata_lcevc(), metadata_is_global(), and obu_is_global().

metadata_is_global()

static int metadata_is_global ( const AV1OBU * obu )

static

Definition at line 64 of file extract_extradata.c.

Referenced by obu_is_global().

obu_is_global()

static int obu_is_global ( const AV1OBU * obu )

static

Definition at line 81 of file extract_extradata.c.

Referenced by extract_extradata_av1().

extract_extradata_av1()

static int extract_extradata_av1 ( AVBSFContext * ctx, AVPacket * pkt, uint8_t ** data, int * size )

static

Definition at line 96 of file extract_extradata.c.

extract_extradata_h2645()

static int extract_extradata_h2645 ( AVBSFContext * ctx, AVPacket * pkt, uint8_t ** data, int * size )

static

Definition at line 166 of file extract_extradata.c.

process_lcevc_nalu()

static int process_lcevc_nalu ( PutByteContext * extradata, PutByteContext * data, int * extradata_sizep, int * data_sizep, const H2645NAL * nal )

static

Rewrite the NALu stripping the unneeded blocks.

Given that length fields coded inside the NALu are not aware of any emulation_3bytes present in the bitstream, we need to keep track of the raw buffer as we navigate the stripped buffer.

Definition at line 283 of file extract_extradata.c.

Referenced by extract_extradata_lcevc().

extract_extradata_lcevc()

static int extract_extradata_lcevc ( AVBSFContext * ctx, AVPacket * pkt, uint8_t ** data, int * size )

static

Definition at line 383 of file extract_extradata.c.

extract_extradata_vc1()

static int extract_extradata_vc1 ( AVBSFContext * ctx, AVPacket * pkt, uint8_t ** data, int * size )

static

Definition at line 491 of file extract_extradata.c.

extract_extradata_mpeg12()

static int extract_extradata_mpeg12 ( AVBSFContext * ctx, AVPacket * pkt, uint8_t ** data, int * size )

static

Definition at line 526 of file extract_extradata.c.

extract_extradata_mpeg4()

static int extract_extradata_mpeg4 ( AVBSFContext * ctx, AVPacket * pkt, uint8_t ** data, int * size )

static

Definition at line 555 of file extract_extradata.c.

extract_extradata_init()

static int extract_extradata_init ( AVBSFContext * ctx )

static

Definition at line 603 of file extract_extradata.c.

extract_extradata_filter()

static int extract_extradata_filter ( AVBSFContext * ctx, AVPacket * pkt )

static

Definition at line 620 of file extract_extradata.c.

extract_extradata_close()

static void extract_extradata_close ( AVBSFContext * ctx )

static

Definition at line 652 of file extract_extradata.c.

Variable Documentation

id

enum AVCodecID id

Definition at line 585 of file extract_extradata.c.

extract

int(* extract) (AVBSFContext *ctx, AVPacket *pkt, uint8_t **data, int *size)	(	AVBSFContext *	ctx,
		AVPacket *	pkt,
		uint8_t **	data,
		int *	size )

Definition at line 586 of file extract_extradata.c.

[struct]

const struct { ... } extract_tab[]

Initial value:

= {
    { AV_CODEC_ID_AV1,        extract_extradata_av1     },
    { AV_CODEC_ID_AVS2,       extract_extradata_mpeg4   },
    { AV_CODEC_ID_AVS3,       extract_extradata_mpeg4   },
    { AV_CODEC_ID_CAVS,       extract_extradata_mpeg4   },
    { AV_CODEC_ID_H264,       extract_extradata_h2645   },
    { AV_CODEC_ID_HEVC,       extract_extradata_h2645   },
    { AV_CODEC_ID_LCEVC,      extract_extradata_lcevc   },
    { AV_CODEC_ID_MPEG1VIDEO, extract_extradata_mpeg12  },
    { AV_CODEC_ID_MPEG2VIDEO, extract_extradata_mpeg12  },
    { AV_CODEC_ID_MPEG4,      extract_extradata_mpeg4   },
    { AV_CODEC_ID_VC1,        extract_extradata_vc1     },
    { AV_CODEC_ID_VVC,        extract_extradata_h2645   },
}

Referenced by extract_extradata_init().

codec_ids

enum AVCodecID codec_ids[]

static

Initial value:

= {
    AV_CODEC_ID_AV1,
    AV_CODEC_ID_AVS2,
    AV_CODEC_ID_AVS3,
    AV_CODEC_ID_CAVS,
    AV_CODEC_ID_H264,
    AV_CODEC_ID_HEVC,
    AV_CODEC_ID_LCEVC,
    AV_CODEC_ID_MPEG1VIDEO,
    AV_CODEC_ID_MPEG2VIDEO,
    AV_CODEC_ID_MPEG4,
    AV_CODEC_ID_VC1,
    AV_CODEC_ID_VVC,
    AV_CODEC_ID_NONE,
}

Definition at line 659 of file extract_extradata.c.

options

const AVOption options[]

static

Initial value:

= {
    { "remove", "remove the extradata from the bitstream", OFFSET(remove), AV_OPT_TYPE_INT,
        { .i64 = 0 }, 0, 1, FLAGS },
    { NULL },
}

Definition at line 677 of file extract_extradata.c.

extract_extradata_class

const AVClass extract_extradata_class

static

Initial value:

= {
    .class_name = "extract_extradata",
    .item_name  = av_default_item_name,
    .option     = options,
    .version    = LIBAVUTIL_VERSION_INT,
}

Definition at line 683 of file extract_extradata.c.

ff_extract_extradata_bsf

const FFBitStreamFilter ff_extract_extradata_bsf

Initial value:

= {
    .p.name         = "extract_extradata",
    .p.codec_ids    = codec_ids,
    .p.priv_class   = &extract_extradata_class,
    .priv_data_size = sizeof(ExtractExtradataContext),
    .init           = extract_extradata_init,
    .filter         = extract_extradata_filter,
    .close          = extract_extradata_close,
}

Definition at line 690 of file extract_extradata.c.