#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(*	SwsPassFunc) (const SwsFrame out, const SwsFrame in, int y, int h, const SwsPass *pass)
	Output `h` lines of filtered data. More...

typedef void(*	SwsPassSetup) (const SwsFrame out, const SwsFrame in, const SwsPass *pass)
	Function to run from the main thread before processing any lines. 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, SwsPassFunc run, SwsPassSetup setup, void priv, void(free)(void priv), 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

◆ SwsPassFunc

typedef void(* SwsPassFunc) (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.

◆ SwsPassSetup

typedef void(* SwsPassSetup) (const SwsFrame *out, const SwsFrame *in, const SwsPass *pass)

Function to run from the main thread before processing any lines.

Definition at line 51 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 762 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,
		SwsPassFunc	run,
		SwsPassSetup	setup,
		void *	priv,
		void()(void priv)	free,
		SwsPass **	out_pass
	)

Allocate and add a new pass to the filter graph.

Takes over ownership of priv, even on failure.

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.
run	Filter function to run.
setup	Optional setup function to run from the main thread.
priv	Private state for the filter run function.
free	Function to free the private state.
out_pass	The newly added pass will be written here on success.

Returns: 0 or a negative error code

Definition at line 115 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 803 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 852 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 836 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 887 of file graph.c.

Data Structures

Typedefs

Functions