graph.c File Reference

#include "libavutil/avassert.h"
#include "libavutil/error.h"
#include "libavutil/imgutils.h"
#include "libavutil/macros.h"
#include "libavutil/mem.h"
#include "libavutil/opt.h"
#include "libavutil/pixdesc.h"
#include "libavutil/slicethread.h"
#include "libswscale/swscale.h"
#include "libswscale/format.h"
#include "cms.h"
#include "lut3d.h"
#include "swscale_internal.h"
#include "graph.h"

Go to the source code of this file.

Functions
static int	pass_alloc_output (SwsPass *pass)
SwsPass *	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)
	Allocate and add a new pass to the filter graph. More...
static int	pass_append (SwsGraph *graph, enum AVPixelFormat fmt, int w, int h, SwsPass **pass, int align, void *priv, sws_filter_run_t run)
static void	run_copy (const SwsImg *out_base, const SwsImg *in_base, int y, int h, const SwsPass *pass)
static void	run_rgb0 (const SwsImg *out, const SwsImg *in, int y, int h, const SwsPass *pass)
static void	run_xyz2rgb (const SwsImg *out, const SwsImg *in, int y, int h, const SwsPass *pass)
static void	run_rgb2xyz (const SwsImg *out, const SwsImg *in, int y, int h, const SwsPass *pass)
static void	free_legacy_swscale (void *priv)
static void	setup_legacy_swscale (const SwsImg *out, const SwsImg *in, const SwsPass *pass)
static SwsContext *	slice_ctx (const SwsPass *pass, int y)
static void	run_legacy_unscaled (const SwsImg *out, const SwsImg *in_base, int y, int h, const SwsPass *pass)
static void	run_legacy_swscale (const SwsImg *out_base, const SwsImg *in, int y, int h, const SwsPass *pass)
static void	get_chroma_pos (SwsGraph *graph, int *h_chr_pos, int *v_chr_pos, const SwsFormat *fmt)
static void	legacy_chr_pos (SwsGraph *graph, int *chr_pos, int override, int *warned)
static int	init_legacy_subpass (SwsGraph *graph, SwsContext *sws, SwsPass *input, SwsPass **output)
static int	add_legacy_sws_pass (SwsGraph *graph, SwsFormat src, SwsFormat dst, SwsPass *input, SwsPass **output)
static void	free_lut3d (void *priv)
static void	setup_lut3d (const SwsImg *out, const SwsImg *in, const SwsPass *pass)
static void	run_lut3d (const SwsImg *out_base, const SwsImg *in_base, int y, int h, const SwsPass *pass)
static int	adapt_colors (SwsGraph *graph, SwsFormat src, SwsFormat dst, SwsPass *input, SwsPass **output)
static int	init_passes (SwsGraph *graph)
static void	sws_graph_worker (void *priv, int jobnr, int threadnr, int nb_jobs, int nb_threads)
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...
void	ff_sws_graph_free (SwsGraph **pgraph)
	Uninitialize any state associate with this filter graph and free it. More...
static int	opts_equal (const SwsContext *c1, const SwsContext *c2)
int	ff_sws_graph_reinit (SwsContext *ctx, const SwsFormat *dst, const SwsFormat *src, int field, SwsGraph **out_graph)
	Wrapper around ff_sws_graph_create() that reuses the existing graph if the format is compatible. More...
void	ff_sws_graph_update_metadata (SwsGraph *graph, const SwsColor *color)
	Update dynamic per-frame HDR metadata without requiring a full reinit. More...
void	ff_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...

Function Documentation

pass_alloc_output()

static int pass_alloc_output ( SwsPass *  pass )

static

Definition at line 38 of file graph.c.

Referenced by ff_sws_graph_add_pass().

ff_sws_graph_add_pass()

SwsPass* 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
	)

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.

Returns

The newly created pass, or NULL on error.

Definition at line 47 of file graph.c.

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

pass_append()

static int pass_append ( SwsGraph *  graph, enum AVPixelFormat  fmt, int  w, int  h, SwsPass **  pass, int  align, void *  priv, sws_filter_run_t  run  )

static

Definition at line 87 of file graph.c.

Referenced by init_legacy_subpass().

run_copy()

static void run_copy ( const SwsImg *  out_base, const SwsImg *  in_base, int  y, int  h, const SwsPass *  pass  )

static

Definition at line 97 of file graph.c.

Referenced by init_passes(), and palette_subblock_data().

run_rgb0()

static void run_rgb0 ( const SwsImg *  out, const SwsImg *  in, int  y, int  h, const SwsPass *  pass  )

static

Definition at line 120 of file graph.c.

Referenced by init_legacy_subpass().

run_xyz2rgb()

static void run_xyz2rgb ( const SwsImg *  out, const SwsImg *  in, int  y, int  h, const SwsPass *  pass  )

static

Definition at line 141 of file graph.c.

Referenced by init_legacy_subpass().

run_rgb2xyz()

static void run_rgb2xyz ( const SwsImg *  out, const SwsImg *  in, int  y, int  h, const SwsPass *  pass  )

static

Definition at line 149 of file graph.c.

Referenced by init_legacy_subpass().

free_legacy_swscale()

static void free_legacy_swscale ( void *  priv )

static

Definition at line 163 of file graph.c.

Referenced by init_legacy_subpass().

setup_legacy_swscale()

static void setup_legacy_swscale ( const SwsImg *  out, const SwsImg *  in, const SwsPass *  pass  )

static

Definition at line 169 of file graph.c.

Referenced by init_legacy_subpass().

slice_ctx()

static SwsContext* slice_ctx ( const SwsPass *  pass, int  y  )

inlinestatic

Definition at line 183 of file graph.c.

Referenced by run_legacy_swscale(), and run_legacy_unscaled().

run_legacy_unscaled()

static void run_legacy_unscaled ( const SwsImg *  out, const SwsImg *  in_base, int  y, int  h, const SwsPass *  pass  )

static

Definition at line 202 of file graph.c.

Referenced by init_legacy_subpass().

run_legacy_swscale()

static void run_legacy_swscale ( const SwsImg *  out_base, const SwsImg *  in, int  y, int  h, const SwsPass *  pass  )

static

Definition at line 213 of file graph.c.

Referenced by init_legacy_subpass().

get_chroma_pos()

static void get_chroma_pos ( SwsGraph *  graph, int *  h_chr_pos, int *  v_chr_pos, const SwsFormat *  fmt  )

static

Definition at line 224 of file graph.c.

Referenced by add_legacy_sws_pass().

legacy_chr_pos()

static void legacy_chr_pos ( SwsGraph *  graph, int *  chr_pos, int  override, int *  warned  )

static

Definition at line 267 of file graph.c.

Referenced by add_legacy_sws_pass().

init_legacy_subpass()

static int init_legacy_subpass ( SwsGraph *  graph, SwsContext *  sws, SwsPass *  input, SwsPass **  output  )

static

For slice threading, we need to create sub contexts, similar to how swscale normally handles it internally. The most important difference is that we handle cascaded contexts before threaded contexts; whereas context_init_threaded() does it the other way around.

Definition at line 282 of file graph.c.

Referenced by add_legacy_sws_pass().

add_legacy_sws_pass()

static int add_legacy_sws_pass ( SwsGraph *  graph, SwsFormat  src, SwsFormat  dst, SwsPass *  input, SwsPass **  output  )

static

Definition at line 384 of file graph.c.

Referenced by adapt_colors(), and init_passes().

free_lut3d()

static void free_lut3d ( void *  priv )

static

Definition at line 460 of file graph.c.

Referenced by adapt_colors().

setup_lut3d()

static void setup_lut3d ( const SwsImg *  out, const SwsImg *  in, const SwsPass *  pass  )

static

Definition at line 466 of file graph.c.

Referenced by adapt_colors().

run_lut3d()

static void run_lut3d ( const SwsImg *  out_base, const SwsImg *  in_base, int  y, int  h, const SwsPass *  pass  )

static

Definition at line 474 of file graph.c.

Referenced by adapt_colors().

adapt_colors()

static int adapt_colors ( SwsGraph *  graph, SwsFormat  src, SwsFormat  dst, SwsPass *  input, SwsPass **  output  )

static

Grayspace does not really have primaries, so just force the use of the equivalent other primary set to avoid a conversion. Technically, this does affect the weights used for the Grayscale conversion, but in practise, that should give the expected results more often than not.

Definition at line 485 of file graph.c.

Referenced by init_passes().

init_passes()

static int init_passes ( SwsGraph *  graph )

static

Definition at line 553 of file graph.c.

Referenced by ff_sws_graph_create().

sws_graph_worker()

static void sws_graph_worker ( void *  priv, int  jobnr, int  threadnr, int  nb_jobs, int  nb_threads  )

static

Definition at line 586 of file graph.c.

Referenced by ff_sws_graph_create().

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 599 of file graph.c.

Referenced by ff_sws_graph_reinit().

ff_sws_graph_free()

void ff_sws_graph_free

(

SwsGraph **

pgraph

)

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

Definition at line 637 of file graph.c.

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

opts_equal()

static int opts_equal ( const SwsContext *  c1, const SwsContext *  c2  )

static

Definition at line 660 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 676 of file graph.c.

Referenced by sws_frame_setup().

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 692 of file graph.c.

Referenced by ff_sws_graph_reinit().

ff_sws_graph_run()

void ff_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 700 of file graph.c.