bsf.c File Reference

#include <string.h>
#include "libavutil/log.h"
#include "libavutil/mem.h"
#include "libavutil/opt.h"
#include "libavutil/avstring.h"
#include "libavutil/bprint.h"
#include "avcodec.h"
#include "bsf.h"

Go to the source code of this file.

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

Functions
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)
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 / flush internal buffers. 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_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...
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 (const 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
const AVBitStreamFilter	ff_list_bsf

Function Documentation

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

static

Definition at line 60 of file bsf.c.

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 216 of file bsf.c.

Referenced by av1_metadata_filter(), filter_units_filter(), h264_metadata_filter(), h264_mp4toannexb_filter(), h264_redundant_pps_filter(), h265_metadata_filter(), hevc_mp4toannexb_filter(), imx_dump_header(), mjpeg2jpeg_filter(), mjpega_dump_header(), mp3_header_decompress(), mpeg2_metadata_filter(), mpeg4_unpack_bframes_filter(), text2movsub(), vp9_metadata_filter(), vp9_raw_reorder_filter(), and vp9_superframe_filter().

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 238 of file bsf.c.

Referenced by aac_adtstoasc_filter(), bsf_list_filter(), chomp_filter(), dca_core_filter(), dump_extradata(), eac3_core_filter(), extract_extradata_filter(), hapqa_extract(), mov2textsub(), noise(), null_filter(), remove_extradata(), trace_headers(), and vp9_superframe_split_filter().

static int bsf_list_init ( AVBSFContext *  bsf )

static

Definition at line 267 of file bsf.c.

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

static

Definition at line 296 of file bsf.c.

static void bsf_list_close ( AVBSFContext *  bsf )

static

Definition at line 353 of file bsf.c.

static const char* bsf_list_item_name ( void *  ctx )

static

Definition at line 364 of file bsf.c.

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

static

Definition at line 487 of file bsf.c.

Referenced by av_bsf_list_parse_str().

Variable Documentation

const AVClass bsf_class

static

Initial value:

= {
    .class_name       = "AVBSFContext",
    .item_name        = av_default_item_name,
    .version          = LIBAVUTIL_VERSION_INT,
    .child_next       = bsf_child_next,
    .child_class_next = ff_bsf_child_class_next,
}

Definition at line 68 of file bsf.c.

Referenced by av_bsf_alloc(), and av_bsf_get_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 389 of file bsf.c.

const AVBitStreamFilter ff_list_bsf

Initial value:

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

Definition at line 395 of file bsf.c.