formats.h File Reference
#include "avfilter.h"

Go to the source code of this file.

Data Structures

struct  AVFilterFormats
 A list of supported formats for one end of a filter link. More...
 
struct  AVFilterChannelLayouts
 

Typedefs

typedef struct
AVFilterChannelLayouts 
AVFilterChannelLayouts
 

Functions

AVFilterChannelLayoutsff_merge_channel_layouts (AVFilterChannelLayouts *a, AVFilterChannelLayouts *b)
 Return a channel layouts/samplerates list which contains the intersection of the layouts/samplerates of a and b. More...
 
AVFilterFormatsff_merge_samplerates (AVFilterFormats *a, AVFilterFormats *b)
 
AVFilterChannelLayoutsff_all_channel_layouts (void)
 Construct an empty AVFilterChannelLayouts/AVFilterFormats struct – representing any channel layout/sample rate. More...
 
AVFilterFormatsff_all_samplerates (void)
 
void ff_set_common_channel_layouts (AVFilterContext *ctx, AVFilterChannelLayouts *layouts)
 A helper for query_formats() which sets all links to the same list of channel layouts/sample rates. More...
 
void ff_set_common_samplerates (AVFilterContext *ctx, AVFilterFormats *samplerates)
 
void ff_set_common_formats (AVFilterContext *ctx, AVFilterFormats *formats)
 A helper for query_formats() which sets all links to the same list of formats. More...
 
int ff_add_channel_layout (AVFilterChannelLayouts **l, uint64_t channel_layout)
 
void ff_channel_layouts_ref (AVFilterChannelLayouts *f, AVFilterChannelLayouts **ref)
 Add *ref as a new reference to f. More...
 
void ff_channel_layouts_unref (AVFilterChannelLayouts **ref)
 Remove a reference to a channel layouts list. More...
 
void ff_channel_layouts_changeref (AVFilterChannelLayouts **oldref, AVFilterChannelLayouts **newref)
 
int ff_default_query_formats (AVFilterContext *ctx)
 
AVFilterFormatsff_make_format_list (const int *fmts)
 Create a list of supported formats. More...
 
int ff_add_format (AVFilterFormats **avff, int fmt)
 Add fmt to the list of media formats contained in *avff. More...
 
AVFilterFormatsff_all_formats (enum AVMediaType type)
 Return a list of all formats supported by Libav for the given media type. More...
 
AVFilterFormatsff_planar_sample_fmts (void)
 Construct a formats list containing all planar sample formats. More...
 
AVFilterFormatsff_merge_formats (AVFilterFormats *a, AVFilterFormats *b)
 Return a format list which contains the intersection of the formats of a and b. More...
 
void ff_formats_ref (AVFilterFormats *formats, AVFilterFormats **ref)
 Add *ref as a new reference to formats. More...
 
void ff_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. More...
 
void ff_formats_changeref (AVFilterFormats **oldref, AVFilterFormats **newref)
 Before After


|formats |<------—. More...

 

Typedef Documentation

Function Documentation

int ff_add_channel_layout ( AVFilterChannelLayouts **  l,
uint64_t  channel_layout 
)
int ff_add_format ( AVFilterFormats **  avff,
int  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 199 of file formats.c.

Referenced by ff_all_formats(), ff_planar_sample_fmts(), init(), query_formats(), and reduce_formats_on_filter().

AVFilterChannelLayouts* ff_all_channel_layouts ( void  )

Construct an empty AVFilterChannelLayouts/AVFilterFormats struct – representing any channel layout/sample rate.

Definition at line 244 of file formats.c.

Referenced by channelmap_query_formats(), ff_default_query_formats(), join_query_formats(), and query_formats().

AVFilterFormats* ff_all_formats ( enum AVMediaType  type)

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

Definition at line 209 of file formats.c.

Referenced by ff_default_query_formats(), and query_formats().

AVFilterFormats* ff_all_samplerates ( void  )
void ff_channel_layouts_changeref ( AVFilterChannelLayouts **  oldref,
AVFilterChannelLayouts **  newref 
)

Definition at line 321 of file formats.c.

Referenced by avfilter_insert_filter().

void ff_channel_layouts_ref ( AVFilterChannelLayouts f,
AVFilterChannelLayouts **  ref 
)

Add *ref as a new reference to f.

Definition at line 257 of file formats.c.

Referenced by channelmap_query_formats(), ff_set_common_channel_layouts(), join_query_formats(), and query_formats().

void ff_channel_layouts_unref ( AVFilterChannelLayouts **  ref)

Remove a reference to a channel layouts list.

Definition at line 303 of file formats.c.

Referenced by avfilter_free(), and pick_format().

int ff_default_query_formats ( AVFilterContext ctx)

Definition at line 381 of file formats.c.

Referenced by main(), and query_formats().

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

Before After


|formats |<------—.

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

Definition at line 327 of file formats.c.

Referenced by avfilter_insert_filter().

void ff_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 262 of file formats.c.

Referenced by ff_set_common_formats(), ff_set_common_samplerates(), and query_formats().

void ff_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 298 of file formats.c.

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

AVFilterFormats* ff_make_format_list ( const int *  fmts)

Create a list of supported formats.

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

Parameters
fmtslist of media formats, terminated by -1
Returns
the format list, with no existing references

Definition at line 165 of file formats.c.

Referenced by query_formats().

AVFilterChannelLayouts* ff_merge_channel_layouts ( AVFilterChannelLayouts a,
AVFilterChannelLayouts b 
)

Return a channel layouts/samplerates list which contains the intersection of the layouts/samplerates 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 elements, neither is modified, and NULL is returned.

Definition at line 126 of file formats.c.

Referenced by query_formats().

AVFilterFormats* ff_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 80 of file formats.c.

Referenced by query_formats().

AVFilterFormats* ff_merge_samplerates ( AVFilterFormats a,
AVFilterFormats b 
)

Definition at line 99 of file formats.c.

Referenced by query_formats().

AVFilterFormats* ff_planar_sample_fmts ( void  )

Construct a formats list containing all planar sample formats.

Definition at line 226 of file formats.c.

Referenced by channelmap_query_formats(), join_query_formats(), and query_formats().

void ff_set_common_channel_layouts ( AVFilterContext ctx,
AVFilterChannelLayouts layouts 
)

A helper for query_formats() which sets all links to the same list of channel layouts/sample rates.

If there are no links hooked to this filter, the list is freed.

Definition at line 356 of file formats.c.

Referenced by ff_default_query_formats(), and query_formats().

void ff_set_common_formats ( AVFilterContext ctx,
AVFilterFormats formats 
)

A helper for query_formats() which sets all links to the same list of formats.

If there are no links hooked to this filter, the list of formats is freed.

Definition at line 375 of file formats.c.

Referenced by channelmap_query_formats(), ff_default_query_formats(), join_query_formats(), and query_formats().

void ff_set_common_samplerates ( AVFilterContext ctx,
AVFilterFormats samplerates 
)