bsf.c File Reference

#include <string.h>
#include "config_components.h"
#include "libavutil/avassert.h"
#include "libavutil/log.h"
#include "libavutil/mem.h"
#include "libavutil/opt.h"
#include "libavutil/avstring.h"
#include "libavutil/bprint.h"
#include "bsf.h"
#include "bsf_internal.h"
#include "codec_desc.h"
#include "codec_par.h"

Go to the source code of this file.

Data Structures
struct	FFBSFContext
struct	BSFListContext
struct	AVBSFList
	Structure for chain/list of bitstream filters. More...

Macros
#define	IS_EMPTY(pkt)   (!(pkt)->data && !(pkt)->side_data_elems)

Functions
static const av_always_inline FFBitStreamFilter *	ff_bsf (const AVBitStreamFilter *bsf)
static av_always_inline FFBSFContext *	ffbsfcontext (AVBSFContext *ctx)
void	av_bsf_free (AVBSFContext **pctx)
	Free a bitstream filter context and everything associated with it; write NULL into the supplied pointer. More...
static void *	bsf_child_next (void *obj, void *prev)
static const char *	bsf_to_name (void *bsf)
const AVClass *	av_bsf_get_class (void)
	Get the AVClass for AVBSFContext. More...
int	av_bsf_alloc (const AVBitStreamFilter *filter, AVBSFContext **pctx)
	Allocate a context for a given bitstream filter. More...
int	av_bsf_init (AVBSFContext *ctx)
	Prepare the filter for use, after all the parameters and options have been set. More...
void	av_bsf_flush (AVBSFContext *ctx)
	Reset the internal bitstream filter state. More...
int	av_bsf_send_packet (AVBSFContext *ctx, AVPacket *pkt)
	Submit a packet for filtering. More...
int	av_bsf_receive_packet (AVBSFContext *ctx, AVPacket *pkt)
	Retrieve a filtered packet. More...
int	ff_bsf_get_packet (AVBSFContext *ctx, AVPacket **pkt)
	Called by the bitstream filters to get the next packet for filtering. More...
int	ff_bsf_get_packet_ref (AVBSFContext *ctx, AVPacket *pkt)
	Called by bitstream filters to get packet for filtering. More...
static int	bsf_list_init (AVBSFContext *bsf)
static int	bsf_list_filter (AVBSFContext *bsf, AVPacket *out)
static void	bsf_list_flush (AVBSFContext *bsf)
static void	bsf_list_close (AVBSFContext *bsf)
static const char *	bsf_list_item_name (void *ctx)
AVBSFList *	av_bsf_list_alloc (void)
	Allocate empty list of bitstream filters. More...
void	av_bsf_list_free (AVBSFList **lst)
	Free list of bitstream filters. More...
int	av_bsf_list_append (AVBSFList *lst, AVBSFContext *bsf)
	Append bitstream filter to the list of bitstream filters. More...
static int	bsf_list_append_internal (AVBSFList *lst, const char *bsf_name, const char *options, AVDictionary **options_dict)
int	av_bsf_list_append2 (AVBSFList *lst, const char *bsf_name, AVDictionary **options)
	Construct new bitstream filter context given it's name and options and append it to the list of bitstream filters. More...
int	av_bsf_list_finalize (AVBSFList **lst, AVBSFContext **bsf)
	Finalize list of bitstream filters. More...
static int	bsf_parse_single (char *str, AVBSFList *bsf_lst)
int	av_bsf_list_parse_str (const char *str, AVBSFContext **bsf_lst)
	Parse string describing list of bitstream filters and create single AVBSFContext describing the whole chain of bitstream filters. More...
int	av_bsf_get_null_filter (AVBSFContext **bsf)
	Get null/pass-through bitstream filter. More...

Variables
static const AVClass	bsf_class
static const AVClass	bsf_list_class
static const FFBitStreamFilter	list_bsf

Macro Definition Documentation

IS_EMPTY

#define IS_EMPTY

(

pkt

)

(!(pkt)->data && !(pkt)->side_data_elems)

Definition at line 35 of file bsf.c.

Function Documentation

ff_bsf()

static const av_always_inline FFBitStreamFilter* ff_bsf ( const AVBitStreamFilter *  bsf )

static

Definition at line 37 of file bsf.c.

Referenced by av_bsf_alloc(), av_bsf_flush(), av_bsf_free(), av_bsf_init(), and av_bsf_receive_packet().

ffbsfcontext()

static av_always_inline FFBSFContext* ffbsfcontext ( AVBSFContext *  ctx )

static

Definition at line 48 of file bsf.c.

Referenced by av_bsf_flush(), av_bsf_free(), av_bsf_send_packet(), ff_bsf_get_packet(), and ff_bsf_get_packet_ref().

bsf_child_next()

static void* bsf_child_next ( void *  obj, void *  prev  )

static

Definition at line 78 of file bsf.c.

bsf_to_name()

static const char* bsf_to_name ( void *  bsf )

static

Definition at line 86 of file bsf.c.

ff_bsf_get_packet()

int ff_bsf_get_packet	(	AVBSFContext *	ctx,
		AVPacket **	pkt
	)

Called by the bitstream filters to get the next packet for filtering.

The filter is responsible for either freeing the packet or passing it to the caller.

Definition at line 236 of file bsf.c.

Referenced by filter(), h264_filter(), h264_mp4toannexb_filter(), hevc_mp4toannexb_filter(), imx_dump_header(), mjpeg2jpeg_filter(), mjpega_dump_header(), mp3_header_decompress(), text2movsub(), and vp9_raw_reorder_filter().

ff_bsf_get_packet_ref()

int ff_bsf_get_packet_ref	(	AVBSFContext *	ctx,
		AVPacket *	pkt
	)

Called by bitstream filters to get packet for filtering.

The reference to packet is moved to provided packet structure.

Parameters

ctx	pointer to AVBSFContext of filter
pkt	pointer to packet to move reference to

Returns

0 on success, negative AVERROR in case of failure

Definition at line 257 of file bsf.c.

Referenced by aac_adtstoasc_filter(), av1_frame_merge_filter(), av1_frame_split_filter(), bsf_list_filter(), chomp_filter(), dca_core_filter(), dump_extradata(), dv_error_marker_filter(), eac3_core_filter(), extract_extradata_filter(), ff_cbs_bsf_generic_filter(), filter_units_filter(), frame_merge_filter(), hapqa_extract(), mov2textsub(), mpeg4_unpack_bframes_filter(), noise(), prores_metadata(), rechunk_filter(), remove_extradata(), setts_filter(), trace_headers(), truehd_core_filter(), vp9_superframe_filter(), and vp9_superframe_split_filter().

bsf_list_init()

static int bsf_list_init ( AVBSFContext *  bsf )

static

Definition at line 284 of file bsf.c.

bsf_list_filter()

static int bsf_list_filter ( AVBSFContext *  bsf, AVPacket *  out  )

static

Definition at line 313 of file bsf.c.

bsf_list_flush()

static void bsf_list_flush ( AVBSFContext *  bsf )

static

Definition at line 355 of file bsf.c.

bsf_list_close()

static void bsf_list_close ( AVBSFContext *  bsf )

static

Definition at line 364 of file bsf.c.

bsf_list_item_name()

static const char* bsf_list_item_name ( void *  ctx )

static

Definition at line 375 of file bsf.c.

bsf_list_append_internal()

static int bsf_list_append_internal ( AVBSFList *  lst, const char *  bsf_name, const char *  options, AVDictionary **  options_dict  )

static

Definition at line 444 of file bsf.c.

Referenced by av_bsf_list_append2(), and bsf_parse_single().

bsf_parse_single()

static int bsf_parse_single ( char *  str, AVBSFList *  bsf_lst  )

static

Definition at line 516 of file bsf.c.

Referenced by av_bsf_list_parse_str().

Variable Documentation

bsf_class

const AVClass bsf_class

static

Initial value:

= {
    .class_name       = "AVBSFContext",
    .item_name        = bsf_to_name,
    .version          = LIBAVUTIL_VERSION_INT,
    .child_next       = bsf_child_next,
    .child_class_iterate = ff_bsf_child_class_iterate,
    .category         = AV_CLASS_CATEGORY_BITSTREAM_FILTER,
}

Definition at line 91 of file bsf.c.

Referenced by av_bsf_alloc(), and av_bsf_get_class().

bsf_list_class

const AVClass bsf_list_class

static

Initial value:

= {
        .class_name = "bsf_list",
        .item_name  = bsf_list_item_name,
        .version    = LIBAVUTIL_VERSION_INT,
}

Definition at line 400 of file bsf.c.

list_bsf

const FFBitStreamFilter list_bsf

static

Initial value:

= {
        .p.name         = "bsf_list",
        .p.priv_class   = &bsf_list_class,
        .priv_data_size = sizeof(BSFListContext),
        .init           = bsf_list_init,
        .filter         = bsf_list_filter,
        .flush          = bsf_list_flush,
        .close          = bsf_list_close,
}

Definition at line 406 of file bsf.c.

Referenced by av_bsf_get_null_filter(), and av_bsf_list_finalize().