#include "libavutil/avassert.h"
#include "libavutil/avstring.h"
#include "libavutil/channel_layout.h"
#include "libavutil/common.h"
#include "libavutil/imgutils.h"
#include "libavutil/pixdesc.h"
#include "libavutil/rational.h"
#include "libavutil/samplefmt.h"
#include "audio.h"
#include "avfilter.h"
#include "formats.h"
#include "internal.h"

Macros
#define	LICENSE_PREFIX "libavfilter license: "

#define	MAX_REGISTERED_AVFILTERS_NB 128

Functions
static int	ff_filter_frame_framed (AVFilterLink link, AVFilterBufferRef frame)

char *	ff_get_ref_perms_string (char *buf, size_t buf_size, int perms)

void	ff_tlog_ref (void ctx, AVFilterBufferRef ref, int end)

unsigned	avfilter_version (void)
	Return the LIBAVFILTER_VERSION_INT constant.

const char *	avfilter_configuration (void)
	Return the libavfilter build-time configuration.

const char *	avfilter_license (void)
	Return the libavfilter license.

void	ff_command_queue_pop (AVFilterContext *filter)

void	ff_insert_pad (unsigned idx, unsigned count, size_t padidx_off, AVFilterPad pads, AVFilterLink *links, AVFilterPad newpad)
	Insert a new pad.

int	avfilter_link (AVFilterContext src, unsigned srcpad, AVFilterContext dst, unsigned dstpad)
	Link two filters together.

void	avfilter_link_free (AVFilterLink **link)
	Free the link in *link, and set its pointer to NULL.

int	avfilter_link_get_channels (AVFilterLink *link)
	Get the number of channels of a link.

void	avfilter_link_set_closed (AVFilterLink *link, int closed)
	Set the closed field of a link.

int	avfilter_insert_filter (AVFilterLink link, AVFilterContext filt, unsigned filt_srcpad_idx, unsigned filt_dstpad_idx)
	Insert a filter in the middle of an existing link.

int	avfilter_config_links (AVFilterContext *filter)
	Negotiate the media format, dimensions, etc of all inputs to a filter.

void	ff_tlog_link (void ctx, AVFilterLink link, int end)

int	ff_request_frame (AVFilterLink *link)
	Request an input frame from the filter at the other end of the link.

int	ff_poll_frame (AVFilterLink *link)
	Poll a frame from the filter chain.

void	ff_update_link_current_pts (AVFilterLink *link, int64_t pts)

int	avfilter_process_command (AVFilterContext filter, const char cmd, const char arg, char res, int res_len, int flags)
	Make the filter instance process a command.

AVFilter *	avfilter_get_by_name (const char *name)
	Get a filter definition matching the given name.

int	avfilter_register (AVFilter *filter)
	Register a filter.

AVFilter **	av_filter_next (AVFilter **filter)
	If filter is NULL, returns a pointer to the first registered filter pointer, if filter is non-NULL, returns the next pointer after filter.

void	avfilter_uninit (void)
	Uninitialize the filter system.

static int	pad_count (const AVFilterPad *pads)

static const char *	default_filter_name (void *filter_ctx)

static void *	filter_child_next (void obj, void prev)

static const AVClass *	filter_child_class_next (const AVClass *prev)

const AVClass *	avfilter_get_class (void)
	Get the class for the AVFilterContext struct.

int	avfilter_open (AVFilterContext *filter_ctx, AVFilter filter, const char *inst_name)
	Create a filter instance.

void	avfilter_free (AVFilterContext *filter)
	Free a filter context.

int	avfilter_init_filter (AVFilterContext filter, const char args, void *opaque)
	Initialize a filter.

const char *	avfilter_pad_get_name (AVFilterPad *pads, int pad_idx)
	Get the name of an AVFilterPad.

enum AVMediaType	avfilter_pad_get_type (AVFilterPad *pads, int pad_idx)
	Get the type of an AVFilterPad.

static int	default_filter_frame (AVFilterLink link, AVFilterBufferRef frame)

static int	ff_filter_frame_needs_framing (AVFilterLink link, AVFilterBufferRef frame)

int	ff_filter_frame (AVFilterLink link, AVFilterBufferRef frame)
	Send a frame of data to the next filter.

Variables
static AVFilter *	registered_avfilters [MAX_REGISTERED_AVFILTERS_NB+1]

static int	next_registered_avfilter_idx = 0

static const AVClass	avfilter_class

Macro Definition Documentation

#define LICENSE_PREFIX "libavfilter license: "

#define MAX_REGISTERED_AVFILTERS_NB 128

Definition at line 394 of file avfilter.c.

Referenced by avfilter_register().

Function Documentation

static int ff_filter_frame_framed	(	AVFilterLink *	link,
		AVFilterBufferRef *	frame
	)

static

Definition at line 641 of file avfilter.c.

Referenced by ff_filter_frame(), ff_filter_frame_needs_framing(), and ff_request_frame().

char* ff_get_ref_perms_string	(	char *	buf,
		size_t	buf_size,
		int	perms
	)

Definition at line 39 of file avfilter.c.

Referenced by ff_get_video_buffer(), and ff_tlog_ref().

void ff_tlog_ref	(	void *	ctx,
		AVFilterBufferRef *	ref,
		int	end
	)

Definition at line 51 of file avfilter.c.

Referenced by ff_filter_frame(), and ff_get_video_buffer().

void ff_command_queue_pop ( AVFilterContext * filter )

Definition at line 95 of file avfilter.c.

Referenced by avfilter_free(), and ff_filter_frame_framed().

void ff_insert_pad	(	unsigned	idx,
		unsigned *	count,
		size_t	padidx_off,
		AVFilterPad **	pads,
		AVFilterLink ***	links,
		AVFilterPad *	newpad
	)

Insert a new pad.

Parameters

idx	Insertion point. Pad is inserted at the end if this point is beyond the end of the list of pads.
count	Pointer to the number of pads in the list
padidx_off	Offset within an AVFilterLink structure to the element to increment when inserting a new pad causes link numbering to change
pads	Pointer to the pointer to the beginning of the list of pads
links	Pointer to the pointer to the beginning of the list of links
newpad	The new pad to add. A copy is made when adding.

Definition at line 104 of file avfilter.c.

Referenced by ff_insert_inpad(), and ff_insert_outpad().

void ff_tlog_link	(	void *	ctx,
		AVFilterLink *	link,
		int	end
	)

Definition at line 309 of file avfilter.c.

Referenced by ff_filter_frame(), ff_get_video_buffer(), and ff_request_frame().

int ff_request_frame ( AVFilterLink * link )

Request an input frame from the filter at the other end of the link.

Parameters

link	the input link

Returns: zero on success

Definition at line 333 of file avfilter.c.

Referenced by av_buffersink_get_buffer_ref(), avfilter_graph_request_oldest(), ff_buffersink_read_compat(), ff_request_frame(), join_request_frame(), poll_frame(), request_frame(), request_samples(), and return_audio_frame().

int ff_poll_frame ( AVFilterLink * link )

Poll a frame from the filter chain.

Parameters

link	the input link

Returns: the number of immediately available frames, a negative number in case of error

Definition at line 355 of file avfilter.c.

Referenced by av_buffersink_poll_frame(), ff_buffersink_read_compat(), ff_poll_frame(), and poll_frame().

void ff_update_link_current_pts	(	AVFilterLink *	link,
		int64_t	pts
	)

Definition at line 373 of file avfilter.c.

Referenced by ff_filter_frame_framed().

static int pad_count ( const AVFilterPad * pads )

static

Definition at line 444 of file avfilter.c.

Referenced by avfilter_open().

static const char* default_filter_name ( void * filter_ctx )

static

Definition at line 455 of file avfilter.c.

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

static

Definition at line 461 of file avfilter.c.

static const AVClass* filter_child_class_next ( const AVClass * prev )

static

Definition at line 469 of file avfilter.c.

static int default_filter_frame	(	AVFilterLink *	link,
		AVFilterBufferRef *	frame
	)

static

Definition at line 636 of file avfilter.c.

Referenced by ff_filter_frame_framed().

static int ff_filter_frame_needs_framing	(	AVFilterLink *	link,
		AVFilterBufferRef *	frame
	)

static

Definition at line 724 of file avfilter.c.

Referenced by ff_filter_frame().

int ff_filter_frame	(	AVFilterLink *	link,
		AVFilterBufferRef *	frame
	)

Send a frame of data to the next filter.

Parameters

link	the output link over which the data is being sent
frame	a reference to the buffer of data being sent. The receiving filter will free this reference when it no longer needs it or pass it on to the next filter.

Returns: >= 0 on success, a negative AVERROR on error. The receiving filter is responsible for unreferencing frame in case of error.

Definition at line 765 of file avfilter.c.

Referenced by channelmap_filter_frame(), default_filter_frame(), end_last_frame(), ff_vf_next_put_image(), filter_frame(), geq_filter_frame(), join_request_frame(), movie_push_frame(), output_frame(), pp_filter_frame(), push_frame(), push_samples(), request_frame(), return_audio_frame(), return_frame(), send_out(), send_silence(), and try_filter_frame().

Variable Documentation

AVFilter* registered_avfilters[MAX_REGISTERED_AVFILTERS_NB+1]

static

Definition at line 396 of file avfilter.c.

int next_registered_avfilter_idx = 0

static

Definition at line 398 of file avfilter.c.

Referenced by avfilter_register(), and avfilter_uninit().

const AVClass avfilter_class

static

Initial value:

= {
    .class_name = "AVFilter",
    .item_name  = default_filter_name,
    .version    = LIBAVUTIL_VERSION_INT,
    .category   = AV_CLASS_CATEGORY_FILTER,
    .child_next = filter_child_next,
    .child_class_next = filter_child_class_next,
}

Definition at line 489 of file avfilter.c.

Referenced by avfilter_get_class(), and avfilter_open().

Macros

Functions

Variables

Macro Definition Documentation

Function Documentation

Variable Documentation