libavfilter/formats.c File Reference

#include "libavutil/eval.h"
#include "libavutil/pixdesc.h"
#include "libavutil/audioconvert.h"
#include "avfilter.h"
#include "internal.h"
#include "all_channel_layouts.h"

Go to the source code of this file.

Defines
#define	MAKE_FORMAT_LIST()
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)
	Return a format list which contains the intersection of the formats of a and b.
int	ff_fmt_is_in (int fmt, const int *fmts)
	Tell is a format is contained in the provided list terminated by -1.
AVFilterFormats *	avfilter_make_format_list (const int *fmts)
	Create a list of supported formats.
AVFilterFormats *	avfilter_make_format64_list (const int64_t *fmts)
int	avfilter_add_format (AVFilterFormats **avff, int64_t fmt)
	Add fmt to the list of media formats contained in *avff.
AVFilterFormats *	avfilter_all_formats (enum AVMediaType type)
AVFilterFormats *	avfilter_make_all_formats (enum AVMediaType type)
	Return a list of all formats supported by FFmpeg for the given media type.
AVFilterFormats *	avfilter_make_all_channel_layouts (void)
	Return a list of all channel layouts supported by FFmpeg.
AVFilterFormats *	avfilter_make_all_packing_formats (void)
	Return a list of all audio packing formats.
void	avfilter_formats_ref (AVFilterFormats *f, AVFilterFormats **ref)
	Add *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, remove *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 |<---------.
int	ff_parse_pixel_format (enum PixelFormat *ret, const char *arg, void *log_ctx)
	Parse a pixel format.
int	ff_parse_sample_format (int *ret, const char *arg, void *log_ctx)
	Parse a sample format name or a corresponding integer representation.
int	ff_parse_sample_rate (int *ret, const char *arg, void *log_ctx)
	Parse a sample rate.
int	ff_parse_channel_layout (int64_t *ret, const char *arg, void *log_ctx)
	Parse a channel layout or a corresponding integer representation.
int	ff_parse_packing_format (int *ret, const char *arg, void *log_ctx)
	Parse a packing format or a corresponding integer representation.
Variables
const int64_t	avfilter_all_channel_layouts []
	A list of all channel layouts supported by libavfilter.

---

Define Documentation

 

#define MAKE_FORMAT_LIST

(

)

Value:

AVFilterFormats *formats;                                           \
    int count = 0;                                                      \
    if (fmts)                                                           \
        for (count = 0; fmts[count] != -1; count++)                     \
            ;                                                           \
    formats = av_mallocz(sizeof(AVFilterFormats));                      \
    if (!formats) return NULL;                                          \
    formats->format_count = count;                                      \
    if (count) {                                                        \
        formats->formats = av_malloc(sizeof(*formats->formats)*count);  \
        if (!formats->formats) {                                        \
            av_free(formats);                                           \
            return NULL;                                                \
        }                                                               \
    }

Definition at line 96 of file formats.c.

Referenced by avfilter_make_format64_list(), and avfilter_make_format_list().

---

Function Documentation

int avfilter_add_format	(	AVFilterFormats **	avff,
		int64_t	fmt
	)

Add fmt to the list of media 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 131 of file formats.c.

Referenced by avfilter_make_all_formats(), and query_formats().

AVFilterFormats* avfilter_all_formats

(

enum AVMediaType

type

)

Deprecated:

Use avfilter_make_all_formats() instead.

Definition at line 149 of file formats.c.

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

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

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

Definition at line 228 of file formats.c.

Referenced by avfilter_insert_filter().

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

Add *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 191 of file formats.c.

Referenced by query_formats(), and set_common_formats().

void avfilter_formats_unref

(

AVFilterFormats **

ref

)

If *ref is non-NULL, remove *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 207 of file formats.c.

Referenced by avfilter_free(), pick_format(), and query_formats().

AVFilterFormats* avfilter_make_all_channel_layouts

(

void

)

Return a list of all channel layouts supported by FFmpeg.

Definition at line 175 of file formats.c.

Referenced by avfilter_default_query_formats(), init(), and query_formats().

AVFilterFormats* avfilter_make_all_formats

(

enum AVMediaType

type

)

Return a list of all formats supported by FFmpeg for the given media type.

Definition at line 155 of file formats.c.

Referenced by avfilter_all_formats(), avfilter_default_query_formats(), init(), and query_formats().

AVFilterFormats* avfilter_make_all_packing_formats

(

void

)

Return a list of all audio packing formats.

Definition at line 180 of file formats.c.

Referenced by avfilter_default_query_formats(), init(), and query_formats().

AVFilterFormats* avfilter_make_format64_list

(

const int64_t *

fmts

)

Definition at line 122 of file formats.c.

Referenced by avfilter_make_all_channel_layouts(), and query_formats().

AVFilterFormats* avfilter_make_format_list

(

const int *

fmts

)

Create a list of supported formats.

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

Parameters:

fmts

list of media formats, terminated by -1. If NULL an empty list is created.

Returns:

the format list, with no existing references

Definition at line 113 of file formats.c.

Referenced by avfilter_make_all_packing_formats(), and query_formats().

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

Return 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 45 of file formats.c.

Referenced by insert_conv_filter(), and query_formats().

int ff_fmt_is_in	(	int	fmt,
		const int *	fmts
	)

Tell is a format is contained in the provided list terminated by -1.

Definition at line 85 of file formats.c.

Referenced by config_input_main(), config_input_overlay(), and config_props().

int ff_parse_channel_layout	(	int64_t *	ret,
		const char *	arg,
		void *	log_ctx
	)

Parse a channel layout or a corresponding integer representation.

Parameters:

	ret	64bit integer pointer to where the value should be written.
	arg	string to parse
	log_ctx	log context

Returns:

0 in case of success, a negative AVERROR code on error

Definition at line 284 of file formats.c.

Referenced by init().

int ff_parse_packing_format	(	int *	ret,
		const char *	arg,
		void *	log_ctx
	)

Parse a packing format or a corresponding integer representation.

Parameters:

	ret	integer pointer to where the value should be written
	arg	string to parse
	log_ctx	log context

Returns:

0 in case of success, a negative AVERROR code on error

Definition at line 299 of file formats.c.

Referenced by init().

int ff_parse_pixel_format	(	enum PixelFormat *	ret,
		const char *	arg,
		void *	log_ctx
	)

Parse a pixel format.

Parameters:

	ret	pixel format pointer to where the value should be written
	arg	string to parse
	log_ctx	log context

Returns:

0 in case of success, a negative AVERROR code on error

Definition at line 242 of file formats.c.

Referenced by init().

int ff_parse_sample_format	(	int *	ret,
		const char *	arg,
		void *	log_ctx
	)

Parse a sample format name or a corresponding integer representation.

Parameters:

	ret	integer pointer to where the value should be written
	arg	string to parse
	log_ctx	log context

Returns:

0 in case of success, a negative AVERROR code on error

Definition at line 257 of file formats.c.

Referenced by init().

int ff_parse_sample_rate	(	int *	ret,
		const char *	arg,
		void *	log_ctx
	)

Parse a sample rate.

Parameters:

	ret	unsigned integer pointer to where the value should be written
	arg	string to parse
	log_ctx	log context

Returns:

0 in case of success, a negative AVERROR code on error

Definition at line 272 of file formats.c.

Referenced by init().

static int find_ref_index

(

AVFilterFormats **

ref

)

[static]

Definition at line 198 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 31 of file formats.c.

Referenced by avfilter_merge_formats().

---

Variable Documentation

const int64_t avfilter_all_channel_layouts[]

A list of all channel layouts supported by libavfilter.

Definition at line 170 of file formats.c.

Referenced by avfilter_make_all_channel_layouts(), and lavfi_read_header().