#include "libavutil/avstring.h"
#include "libavutil/channel_layout.h"
#include "libavutil/common.h"
#include "libavutil/imgutils.h"
#include "libavutil/internal.h"
#include "libavutil/opt.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"
#include "video.h"

Macros
#define	LICENSE_PREFIX "libavfilter license: "

#define	OFFSET(x) offsetof(AVFilterContext, x)

#define	FLAGS AV_OPT_FLAG_VIDEO_PARAM

Functions
unsigned	avfilter_version (void)
	Return the LIBAVFILTER_VERSION_INT constant. More...

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

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

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

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

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. More...

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

void	ff_dlog_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. More...

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

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

int	avfilter_register (AVFilter *filter)
	Register a filter. More...

const AVFilter *	avfilter_next (const AVFilter *prev)
	Iterate over all registered filters. More...

int	avfilter_pad_count (const AVFilterPad *pads)
	Get the number of elements in a NULL-terminated array of AVFilterPads (e.g. More...

static const char *	filter_name (void *p)

static void *	filter_child_next (void obj, void prev)

static const AVClass *	filter_child_class_next (const AVClass *prev)

static int	default_execute (AVFilterContext ctx, avfilter_action_func func, void arg, int ret, int nb_jobs)

AVFilterContext *	ff_filter_alloc (const AVFilter filter, const char inst_name)
	Allocate a new filter context and return it. More...

static void	free_link (AVFilterLink *link)

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

static int	process_unnamed_options (AVFilterContext ctx, AVDictionary options, const char args)

int	avfilter_init_dict (AVFilterContext ctx, AVDictionary *options)
	Initialize a filter with the supplied dictionary of options. More...

int	avfilter_init_str (AVFilterContext filter, const char args)
	Initialize a filter with the supplied parameters. More...

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

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

static int	default_filter_frame (AVFilterLink link, AVFrame frame)

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

const AVClass *	avfilter_get_class (void)

Variables
static AVFilter *	first_filter

static const AVOption	avfilter_options []

static const AVClass	avfilter_class

Macro Definition Documentation

#define LICENSE_PREFIX "libavfilter license: "

Referenced by avfilter_license().

#define OFFSET ( x ) offsetof(AVFilterContext, x)

Definition at line 364 of file avfilter.c.

#define FLAGS AV_OPT_FLAG_VIDEO_PARAM

Definition at line 365 of file avfilter.c.

Function Documentation

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 54 of file avfilter.c.

Referenced by ff_insert_inpad(), and ff_insert_outpad().

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

Definition at line 225 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 249 of file avfilter.c.

Referenced by av_buffersink_get_frame(), av_buffersink_get_samples(), 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 260 of file avfilter.c.

Referenced by ff_poll_frame(), and poll_frame().

static const char* filter_name ( void * p )

static

Definition at line 335 of file avfilter.c.

Referenced by main().

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

static

Definition at line 341 of file avfilter.c.

static const AVClass* filter_child_class_next ( const AVClass * prev )

static

Definition at line 349 of file avfilter.c.

static int default_execute	(	AVFilterContext *	ctx,
		avfilter_action_func *	func,
		void *	arg,
		int *	ret,
		int	nb_jobs
	)

static

Definition at line 382 of file avfilter.c.

Referenced by ff_filter_alloc().

AVFilterContext* ff_filter_alloc	(	const AVFilter *	filter,
		const char *	inst_name
	)

Allocate a new filter context and return it.

Parameters

filter	what filter to create an instance of
inst_name	name to give to the new filter context

Returns: newly created filter context or NULL on failure

Definition at line 395 of file avfilter.c.

Referenced by avfilter_graph_alloc_filter().

static void free_link ( AVFilterLink * link )

static

Definition at line 477 of file avfilter.c.

Referenced by avfilter_free().

static int process_unnamed_options	(	AVFilterContext *	ctx,
		AVDictionary **	options,
		const char *	args
	)

static

Definition at line 528 of file avfilter.c.

Referenced by avfilter_init_str().

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

static

Definition at line 728 of file avfilter.c.

Referenced by ff_filter_frame().

int ff_filter_frame	(	AVFilterLink *	link,
		AVFrame *	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 733 of file avfilter.c.

Referenced by channelmap_filter_frame(), color_request_frame(), compand_delay(), compand_drain(), compand_nodelay(), default_filter_frame(), filter_frame(), join_request_frame(), output_frame(), request_frame(), return_audio_frame(), return_frame(), shuffleplanes_filter_frame(), and source_request_frame().

Variable Documentation

AVFilter* first_filter

static

Definition at line 278 of file avfilter.c.

Referenced by avfilter_next(), and avfilter_register().

const AVOption avfilter_options[]

static

Initial value:

= {
    { "thread_type", "Allowed thread types", OFFSET(thread_type), AV_OPT_TYPE_FLAGS,
        { .i64 = AVFILTER_THREAD_SLICE }, 0, INT_MAX, FLAGS, "thread_type" },
        { "slice", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AVFILTER_THREAD_SLICE }, .unit = "thread_type" },
    { NULL },
}

Definition at line 366 of file avfilter.c.

const AVClass avfilter_class

static

Initial value:

= {
    .class_name = "AVFilter",
    .item_name  = filter_name,
    .version    = LIBAVUTIL_VERSION_INT,
    .child_next = filter_child_next,
    .child_class_next = filter_child_class_next,
    .option           = avfilter_options,
}

Definition at line 373 of file avfilter.c.

Referenced by avfilter_get_class(), and ff_filter_alloc().

Macros

Functions

Variables

Macro Definition Documentation

Function Documentation

Variable Documentation