graph.h File Reference

#include "libavutil/slicethread.h"
#include "swscale.h"
#include "utils.h"

Go to the source code of this file.

Data Structures
struct	SwsImg
	Represents a view into a single field of frame data. More...
struct	SwsPass
	Represents a single filter pass in the scaling graph. More...
struct	SwsGraph
	Filter graph, which represents a 'baked' pixel format conversion. More...

Typedefs
typedef void(*	sws_filter_run_t) (const SwsImg *out, const SwsImg *in, int y, int h, const SwsPass *pass)
	Output h lines of filtered data. More...

Functions
int	sws_graph_create (SwsContext *ctx, const SwsFormat *dst, const SwsFormat *src, int field, SwsGraph **out_graph)
	Allocate and initialize the filter graph. More...
void	sws_graph_free (SwsGraph **graph)
	Uninitialize any state associate with this filter graph and free it. More...
int	sws_graph_reinit (SwsContext *ctx, const SwsFormat *dst, const SwsFormat *src, int field, SwsGraph **graph)
	Wrapper around sws_graph_create that does nothing if the format is unchanged. More...
void	sws_graph_run (SwsGraph *graph, uint8_t *const out_data[4], const int out_linesize[4], const uint8_t *const in_data[4], const int in_linesize[4])
	Dispatch the filter graph on a single field. More...

Typedef Documentation

sws_filter_run_t

typedef void(* sws_filter_run_t) (const SwsImg *out, const SwsImg *in, int y, int h, const SwsPass *pass)

Output h lines of filtered data.

out and in point to the start of the image buffer for this pass.

Definition at line 44 of file graph.h.

Function Documentation

sws_graph_create()

int sws_graph_create	(	SwsContext *	ctx,
		const SwsFormat *	dst,
		const SwsFormat *	src,
		int	field,
		SwsGraph **	out_graph
	)

Allocate and initialize the filter graph.

Returns 0 or a negative error.

Definition at line 508 of file graph.c.

Referenced by sws_graph_reinit().

sws_graph_free()

void sws_graph_free

(

SwsGraph **

graph

)

Uninitialize any state associate with this filter graph and free it.

Definition at line 546 of file graph.c.

Referenced by sws_frame_setup(), sws_freeContext(), sws_graph_create(), and sws_graph_reinit().

sws_graph_reinit()

int sws_graph_reinit	(	SwsContext *	ctx,
		const SwsFormat *	dst,
		const SwsFormat *	src,
		int	field,
		SwsGraph **	graph
	)

Wrapper around sws_graph_create that does nothing if the format is unchanged.

Must be called after changing any of the fields in ctx, or else they will have no effect.

Definition at line 584 of file graph.c.

Referenced by sws_frame_setup().

sws_graph_run()

void sws_graph_run	(	SwsGraph *	graph,
		uint8_t *const	out_data[4],
		const int	out_linesize[4],
		const uint8_t *const	in_data[4],
		const int	in_linesize[4]
	)

Dispatch the filter graph on a single field.

Internally threaded.

Definition at line 598 of file graph.c.

Referenced by sws_scale_frame().