libavfilter/formats.c File Reference

#include "libavutil/pixdesc.h"
#include "avfilter.h"

Go to the source code of this file.

Functions
static void	merge_ref (AVFilterFormats *ret, AVFilterFormats *a)
	Add all refs from a to ret and destroy a.
AVFilterFormats *	avfilter_merge_formats (AVFilterFormats *a, AVFilterFormats *b)
	Returns a format list which contains the intersection of the formats of a and b.
AVFilterFormats *	avfilter_make_format_list (const enum PixelFormat *pix_fmts)
	Creates a list of supported formats.
int	avfilter_add_colorspace (AVFilterFormats **avff, enum PixelFormat pix_fmt)
	Adds pix_fmt to the list of pixel formats contained in *avff.
AVFilterFormats *	avfilter_all_colorspaces (void)
	Returns a list of all colorspaces supported by FFmpeg.
void	avfilter_formats_ref (AVFilterFormats *f, AVFilterFormats **ref)
	Adds *ref as a new reference to formats.
static int	find_ref_index (AVFilterFormats **ref)
void	avfilter_formats_unref (AVFilterFormats **ref)
	If *ref is non-NULL, removes *ref as a reference to the format list it currently points to, deallocates that list if this was the last reference, and sets *ref to NULL.
void	avfilter_formats_changeref (AVFilterFormats **oldref, AVFilterFormats **newref)
	Before After ________ ________ |formats |<---------.

---

Function Documentation

int avfilter_add_colorspace	(	AVFilterFormats **	avff,
		enum PixelFormat	pix_fmt
	)

Adds pix_fmt to the list of pixel formats contained in *avff.

If *avff is NULL the function allocates the filter formats struct and puts its pointer in *avff.

Returns:

a non negative value in case of success, or a negative value corresponding to an AVERROR code in case of error

Definition at line 92 of file formats.c.

Referenced by avfilter_all_colorspaces(), and query_formats().

AVFilterFormats* avfilter_all_colorspaces

(

void

)

Returns a list of all colorspaces supported by FFmpeg.

Definition at line 109 of file formats.c.

Referenced by avfilter_default_query_formats().

void avfilter_formats_changeref	(	AVFilterFormats **	oldref,
		AVFilterFormats **	newref
	)

Before After ________ ________ |formats |<---------.

|formats |<---------. | ____ | ___|___ | ____ | ___|___ | |refs| | | | | | |refs| | | | | NULL | |* *--------->|*oldref| | |* *--------->|*newref| ^ | |* * | | |_______| | |* * | | |_______| ___|___ | |____| | | |____| | | | | |________| |________| |*oldref| |_______|

Definition at line 158 of file formats.c.

Referenced by avfilter_insert_filter().

void avfilter_formats_ref	(	AVFilterFormats *	formats,
		AVFilterFormats **	ref
	)

Adds *ref as a new reference to formats.

That is the pointers will point like in the ascii art below: ________ |formats |<--------. | ____ | ____|___________________ | |refs| | | __|_ | |* * | | | | | | AVFilterLink | |* *--------->|*ref| | |____| | | |____| |________| |________________________

Definition at line 121 of file formats.c.

Referenced by avfilter_set_common_formats(), and query_formats().

void avfilter_formats_unref

(

AVFilterFormats **

ref

)

If *ref is non-NULL, removes *ref as a reference to the format list it currently points to, deallocates that list if this was the last reference, and sets *ref to NULL.

Before After ________ ________ NULL |formats |<--------. |formats | ^ | ____ | ____|________________ | ____ | ____|________________ | |refs| | | __|_ | |refs| | | __|_ | |* * | | | | | | AVFilterLink | |* * | | | | | | AVFilterLink | |* *--------->|*ref| | |* | | | |*ref| | |____| | | |____| | |____| | | |____| |________| |_____________________ |________| |_____________________

Definition at line 137 of file formats.c.

Referenced by pick_format(), and query_formats().

AVFilterFormats* avfilter_make_format_list

(

const enum PixelFormat *

pix_fmts

)

Creates a list of supported formats.

This is intended for use in AVFilter->query_formats().

Parameters:

pix_fmt

list of pixel formats, terminated by PIX_FMT_NONE

Returns:

the format list, with no existing references

Definition at line 76 of file formats.c.

Referenced by query_formats().

AVFilterFormats* avfilter_merge_formats	(	AVFilterFormats *	a,
		AVFilterFormats *	b
	)

Returns a format list which contains the intersection of the formats of a and b.

Also, all the references of a, all the references of b, and a and b themselves will be deallocated.

If a and b do not share any common formats, neither is modified, and NULL is returned.

Definition at line 42 of file formats.c.

Referenced by query_formats().

static int find_ref_index

(

AVFilterFormats **

ref

)

[static]

Definition at line 128 of file formats.c.

Referenced by avfilter_formats_changeref(), and avfilter_formats_unref().

static void merge_ref	(	AVFilterFormats *	ret,
		AVFilterFormats *	a
	)			[static]

Add all refs from a to ret and destroy a.

Definition at line 28 of file formats.c.

Referenced by avfilter_merge_formats().