#include <stdbool.h>
#include "libavutil/slicethread.h"
#include "libavutil/buffer.h"
#include "swscale.h"
#include "format.h"

Data Structures
struct	SwsPassBuffer
	Represents an allocated output buffer for a filter pass. 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 SwsFrame out, const SwsFrame in, int y, int h, const SwsPass *pass)
	Output `h` lines of filtered data. More...

Functions
static av_always_inline av_const int	ff_fmt_vshift (enum AVPixelFormat fmt, int plane)

int	ff_sws_graph_create (SwsContext ctx, const SwsFormat dst, const SwsFormat src, int field, SwsGraph *out_graph)
	Allocate and initialize the filter graph. More...

int	ff_sws_graph_add_pass (SwsGraph graph, enum AVPixelFormat fmt, int width, int height, SwsPass input, int align, void priv, sws_filter_run_t run, SwsPass *out_pass)
	Allocate and add a new pass to the filter graph. More...

void	ff_sws_graph_free (SwsGraph **graph)
	Uninitialize any state associate with this filter graph and free it. More...

void	ff_sws_graph_update_metadata (SwsGraph graph, const SwsColor color)
	Update dynamic per-frame HDR metadata without requiring a full reinit. More...

int	ff_sws_graph_reinit (SwsContext ctx, const SwsFormat dst, const SwsFormat src, int field, SwsGraph *graph)
	Wrapper around ff_sws_graph_create() that reuses the existing graph if the format is compatible. More...

void	ff_sws_graph_run (SwsGraph graph, const AVFrame dst, const AVFrame *src)
	Dispatch the filter graph on a single field of the given frames. More...

Typedef Documentation

◆ sws_filter_run_t

typedef void(* sws_filter_run_t) (const SwsFrame *out, const SwsFrame *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 45 of file graph.h.

Function Documentation

◆ ff_fmt_vshift()

static av_always_inline av_const int ff_fmt_vshift	(	enum AVPixelFormat	fmt,
		int	plane
	)

static

Definition at line 32 of file graph.h.

Referenced by frame_shift(), and run_copy().

◆ ff_sws_graph_create()

int ff_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 768 of file graph.c.

Referenced by ff_sws_graph_reinit().

◆ ff_sws_graph_add_pass()

int ff_sws_graph_add_pass	(	SwsGraph *	graph,
		enum AVPixelFormat	fmt,
		int	width,
		int	height,
		SwsPass *	input,
		int	align,
		void *	priv,
		sws_filter_run_t	run,
		SwsPass **	out_pass
	)

Allocate and add a new pass to the filter graph.

Parameters

graph	Filter graph to add the pass to.
fmt	Pixel format of the output image.
w	Width of the output image.
h	Height of the output image.
input	Previous pass to read from, or NULL for the input image.
align	Minimum slice alignment for this pass, or 0 for no threading.
priv	Private state for the filter run function.
run	Filter function to run.
out_pass	The newly added pass will be written here on success.

Returns: 0 or a negative error code

Definition at line 107 of file graph.c.

Referenced by adapt_colors(), compile(), init_legacy_subpass(), and init_passes().

◆ ff_sws_graph_free()

void ff_sws_graph_free ( SwsGraph ** graph )

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

Definition at line 809 of file graph.c.

Referenced by ff_sws_graph_create(), ff_sws_graph_reinit(), sws_frame_setup(), and sws_freeContext().

◆ ff_sws_graph_update_metadata()

void ff_sws_graph_update_metadata	(	SwsGraph *	graph,
		const SwsColor *	color
	)

Update dynamic per-frame HDR metadata without requiring a full reinit.

Definition at line 863 of file graph.c.

Referenced by ff_sws_graph_reinit().

◆ ff_sws_graph_reinit()

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

Wrapper around ff_sws_graph_create() that reuses the existing graph if the format is compatible.

This will also update dynamic per-frame metadata. Must be called after changing any of the fields in ctx, or else they will have no effect.

Definition at line 847 of file graph.c.

Referenced by sws_frame_setup().

◆ ff_sws_graph_run()

void ff_sws_graph_run	(	SwsGraph *	graph,
		const AVFrame *	dst,
		const AVFrame *	src
	)

Dispatch the filter graph on a single field of the given frames.

Internally threaded.

Definition at line 898 of file graph.c.

Data Structures

Typedefs

Functions