internal API functions More...

#include "avfilter.h"
#include "avfiltergraph.h"
#include "formats.h"
#include "video.h"

Include dependency graph for libavfilter/internal.h:

Data Structures
struct	AVFilterPool

struct	AVFilterCommand

struct	AVFilterPad
	A filter pad used for either input or output. More...

Macros
#define	POOL_SIZE 32

#define	ff_tlog(pctx, ...) do { if (0) av_log(pctx, AV_LOG_DEBUG, __VA_ARGS__); } while (0)

#define	FF_TPRINTF_START(ctx, func) ff_tlog(NULL, "%-16s: ", #func)

#define	AVFILTER_DEFINE_CLASS(fname)

#define	FF_INLINK_IDX(link) ((int)((link)->dstpad - (link)->dst->input_pads))
	Find the index of a link. More...

#define	FF_OUTLINK_IDX(link) ((int)((link)->srcpad - (link)->src->output_pads))

Typedefs
typedef struct AVFilterPool	AVFilterPool

typedef struct AVFilterCommand	AVFilterCommand

Enumerations
enum	{ FF_LINK_FLAG_REQUEST_LOOP = 1 }
	Flags for AVFilterLink.flags. More...

Functions
void	ff_avfilter_graph_update_heap (AVFilterGraph graph, AVFilterLink link)
	Update the position of a link in the age heap. More...

void	ff_avfilter_default_free_buffer (AVFilterBuffer *buf)
	default handler for freeing audio/video buffer when there are no references left More...

int	ff_fmt_is_in (int fmt, const int *fmts)
	Tell is a format is contained in the provided list terminated by -1. More...

int *	ff_copy_int_list (const int *const list)
	Return a copy of a list of integers terminated by -1, or NULL in case of copy failure. More...

int64_t *	ff_copy_int64_list (const int64_t *const list)
	Return a copy of a list of 64-bit integers, or NULL in case of copy failure. More...

int	ff_parse_pixel_format (enum AVPixelFormat ret, const char arg, void *log_ctx)
	Parse a pixel format. More...

int	ff_parse_sample_rate (int ret, const char arg, void *log_ctx)
	Parse a sample rate. More...

int	ff_parse_time_base (AVRational ret, const char arg, void *log_ctx)
	Parse a time base. More...

int	ff_parse_sample_format (int ret, const char arg, void *log_ctx)
	Parse a sample format name or a corresponding integer representation. More...

int	ff_parse_channel_layout (int64_t ret, const char arg, void *log_ctx)
	Parse a channel layout or a corresponding integer representation. More...

void	ff_update_link_current_pts (AVFilterLink *link, int64_t pts)

void	ff_command_queue_pop (AVFilterContext *filter)

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

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

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

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

static void	ff_insert_inpad (AVFilterContext f, unsigned index, AVFilterPad p)
	Insert a new input pad for the filter. More...

static void	ff_insert_outpad (AVFilterContext f, unsigned index, AVFilterPad p)
	Insert a new output pad for the filter. More...

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

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

AVFilterBufferRef *	ff_copy_buffer_ref (AVFilterLink outlink, AVFilterBufferRef ref)

int	ff_buffersink_read_compat (AVFilterContext ctx, AVFilterBufferRef *buf)

int	ff_buffersink_read_samples_compat (AVFilterContext ctx, AVFilterBufferRef *pbuf, int nb_samples)

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

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

void	ff_filter_graph_remove_filter (AVFilterGraph graph, AVFilterContext filter)
	Remove a filter from a graph;. More...

Detailed Description

internal API functions

Definition in file libavfilter/internal.h.

Macro Definition Documentation

#define AVFILTER_DEFINE_CLASS ( fname )

Value:

static const AVClass fname##_class = {      \
        .class_name = #fname,                   \
        .item_name  = av_default_item_name,     \
        .option     = fname##_options,          \
        .version    = LIBAVUTIL_VERSION_INT,    \
        .category   = AV_CLASS_CATEGORY_FILTER, \
    }

Definition at line 292 of file libavfilter/internal.h.

Referenced by compute_dar(), filter_frame(), movie_request_frame(), query_formats(), and request_frame().

#define FF_INLINK_IDX ( link ) ((int)((link)->dstpad - (link)->dst->input_pads))

Find the index of a link.

I.e. find i such that link == ctx->(in|out)puts[i]

Definition at line 309 of file libavfilter/internal.h.

Referenced by filter_frame(), get_audio_buffer(), get_video_buffer(), and process_frame().

#define FF_OUTLINK_IDX ( link ) ((int)((link)->srcpad - (link)->src->output_pads))

Definition at line 310 of file libavfilter/internal.h.

Referenced by config_output(), movie_config_output_props(), movie_request_frame(), and request_frame().

#define ff_tlog	(	pctx,
		...
	)	do { if (0) av_log(pctx, AV_LOG_DEBUG, __VA_ARGS__); } while (0)

Definition at line 225 of file libavfilter/internal.h.

Referenced by ff_filter_frame(), ff_tlog_link(), and ff_tlog_ref().

#define FF_TPRINTF_START	(	ctx,
		func
	)	ff_tlog(NULL, "%-16s: ", #func)

Definition at line 228 of file libavfilter/internal.h.

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

#define POOL_SIZE 32

Definition at line 32 of file libavfilter/internal.h.

Referenced by ff_default_get_video_buffer().

Typedef Documentation

typedef struct AVFilterCommand AVFilterCommand

typedef struct AVFilterPool AVFilterPool

Enumeration Type Documentation

anonymous enum

Flags for AVFilterLink.flags.

Enumerator

FF_LINK_FLAG_REQUEST_LOOP

Frame requests may need to loop in order to be fulfilled.

A filter must set this flags on an output link if it may return 0 in request_frame() without filtering a frame.

Definition at line 331 of file libavfilter/internal.h.

Function Documentation

void ff_avfilter_default_free_buffer ( AVFilterBuffer * buf )

default handler for freeing audio/video buffer when there are no references left

Definition at line 34 of file libavfilter/buffer.c.

Referenced by ff_default_get_video_buffer(), and ff_get_audio_buffer().

void ff_avfilter_graph_update_heap	(	AVFilterGraph *	graph,
		AVFilterLink *	link
	)

Update the position of a link in the age heap.

Definition at line 1159 of file avfiltergraph.c.

Referenced by ff_update_link_current_pts().

int ff_buffersink_read_compat	(	AVFilterContext *	ctx,
		AVFilterBufferRef **	buf
	)

int ff_buffersink_read_samples_compat	(	AVFilterContext *	ctx,
		AVFilterBufferRef **	pbuf,
		int	nb_samples
	)

void ff_command_queue_pop ( AVFilterContext * filter )

Definition at line 84 of file avfilter.c.

Referenced by avfilter_free(), and ff_filter_frame_framed().

AVFilterBufferRef* ff_copy_buffer_ref	(	AVFilterLink *	outlink,
		AVFilterBufferRef *	ref
	)

int64_t* ff_copy_int64_list ( const int64_t *const list )

Return a copy of a list of 64-bit integers, or NULL in case of copy failure.

Definition at line 284 of file formats.c.

int* ff_copy_int_list ( const int *const list )

Return a copy of a list of integers terminated by -1, or NULL in case of copy failure.

Definition at line 277 of file formats.c.

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 495 of file avfilter.c.

Referenced by avfilter_graph_alloc_filter(), and ff_filter_alloc().

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 964 of file avfilter.c.

Referenced by default_filter_frame().

void ff_filter_graph_remove_filter	(	AVFilterGraph *	graph,
		AVFilterContext *	filter
	)

Remove a filter from a graph;.

Definition at line 62 of file avfiltergraph.c.

Referenced by avfilter_free().

int ff_fmt_is_in	(	int	fmt,
		const int *	fmts
	)

Tell is a format is contained in the provided list terminated by -1.

Definition at line 254 of file formats.c.

Referenced by config_input(), config_input_main(), config_input_overlay(), config_out_props(), and config_props().

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

static void ff_insert_inpad	(	AVFilterContext *	f,
		unsigned	index,
		AVFilterPad *	p
	)

inlinestatic

Insert a new input pad for the filter.

Definition at line 254 of file libavfilter/internal.h.

Referenced by decimate_init(), fieldmatch_init(), init(), and join_init().

static void ff_insert_outpad	(	AVFilterContext *	f,
		unsigned	index,
		AVFilterPad *	p
	)

inlinestatic

Insert a new output pad for the filter.

Definition at line 265 of file libavfilter/internal.h.

Referenced by init(), movie_common_init(), and split_init().

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 93 of file avfilter.c.

Referenced by ff_insert_inpad(), and ff_insert_outpad().

int ff_parse_channel_layout	(	int64_t *	ret,
		const char *	arg,
		void *	log_ctx
	)

Parse a channel layout or a corresponding integer representation.

Parameters

ret	64bit integer pointer to where the value should be written.
arg	string to parse
log_ctx	log context

Returns: 0 in case of success, a negative AVERROR code on error

Definition at line 632 of file formats.c.

Referenced by init().

int ff_parse_pixel_format	(	enum AVPixelFormat *	ret,
		const char *	arg,
		void *	log_ctx
	)

Parse a pixel format.

Parameters

ret	pixel format pointer to where the value should be written
arg	string to parse
log_ctx	log context

Returns: 0 in case of success, a negative AVERROR code on error

Definition at line 579 of file formats.c.

Referenced by init().

int ff_parse_sample_format	(	int *	ret,
		const char *	arg,
		void *	log_ctx
	)

Parse a sample format name or a corresponding integer representation.

Parameters

ret	integer pointer to where the value should be written
arg	string to parse
log_ctx	log context

Returns: 0 in case of success, a negative AVERROR code on error

Definition at line 594 of file formats.c.

Referenced by init().

int ff_parse_sample_rate	(	int *	ret,
		const char *	arg,
		void *	log_ctx
	)

Parse a sample rate.

Parameters

ret	unsigned integer pointer to where the value should be written
arg	string to parse
log_ctx	log context

Returns: 0 in case of success, a negative AVERROR code on error

Definition at line 620 of file formats.c.

Referenced by init().

int ff_parse_time_base	(	AVRational *	ret,
		const char *	arg,
		void *	log_ctx
	)

Parse a time base.

Parameters

ret	unsigned AVRational pointer to where the value should be written
arg	string to parse
log_ctx	log context

Returns: 0 in case of success, a negative AVERROR code on error

Definition at line 609 of file formats.c.

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 350 of file avfilter.c.

Referenced by av_buffersink_poll_frame(), av_buffersink_set_frame_size(), ff_insert_outpad(), and ff_poll_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 319 of file avfilter.c.

Referenced by av_buffersink_get_frame_flags(), avfilter_graph_request_oldest(), ff_insert_outpad(), ff_request_frame(), join_request_frame(), request_frame(), request_inlink(), request_samples(), return_audio_frame(), and while().

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

Definition at line 295 of file avfilter.c.

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

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

Definition at line 40 of file avfilter.c.

Referenced by ff_filter_frame().

void ff_update_link_current_pts	(	AVFilterLink *	link,
		int64_t	pts
	)

Definition at line 368 of file avfilter.c.

Referenced by ff_filter_frame_framed().

Paris Hackday Code

Data Structures

Macros

Typedefs

Enumerations

Functions

Detailed Description

Macro Definition Documentation

Typedef Documentation

Enumeration Type Documentation

Function Documentation