extract_extradata.c File Reference

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

Go to the source code of this file.

Data Structures
struct	ExtractExtradataContext

Macros
#define	OFFSET(x)   offsetof(ExtractExtradataContext, 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 uint64_t	get_mb (GetBitContext *s)
static int	write_lcevc_nalu (AVBSFContext *ctx, PutByteContext *pbc, const H2645NAL *nal, int remove)
	Rewrite the NALu stripping the unneeded blocks. More...
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

)

offsetof(ExtractExtradataContext, x)

Definition at line 646 of file extract_extradata.c.

FLAGS

#define FLAGS   (AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_BSF_PARAM)

Definition at line 647 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 55 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 63 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 80 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 95 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 165 of file extract_extradata.c.

get_mb()

static uint64_t get_mb ( GetBitContext *  s )

inlinestatic

Definition at line 271 of file extract_extradata.c.

Referenced by write_lcevc_nalu().

write_lcevc_nalu()

static int write_lcevc_nalu ( AVBSFContext *  ctx, PutByteContext *  pbc, const H2645NAL *  nal, int  remove  )

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 293 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 366 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 462 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 497 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 526 of file extract_extradata.c.

extract_extradata_init()

static int extract_extradata_init ( AVBSFContext *  ctx )

static

Definition at line 574 of file extract_extradata.c.

extract_extradata_filter()

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

static

Definition at line 591 of file extract_extradata.c.

extract_extradata_close()

static void extract_extradata_close ( AVBSFContext *  ctx )

static

Definition at line 623 of file extract_extradata.c.

Variable Documentation

id

enum AVCodecID id

Definition at line 556 of file extract_extradata.c.

extract

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

Definition at line 557 of file extract_extradata.c.

extract_tab

const { ... } 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 630 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 648 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 654 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 661 of file extract_extradata.c.