FFmpeg
Macros | Functions
formats.c File Reference
#include "libavutil/avassert.h"
#include "libavutil/channel_layout.h"
#include "libavutil/common.h"
#include "libavutil/eval.h"
#include "libavutil/pixdesc.h"
#include "libavutil/parseutils.h"
#include "avfilter.h"
#include "internal.h"
#include "formats.h"

Go to the source code of this file.

Macros

#define KNOWN(l)   (!FF_LAYOUT2COUNT(l)) /* for readability */
 
#define MERGE_REF(ret, a, fmts, type, fail)
 Add all refs from a to ret and destroy a. More...
 
#define MERGE_FORMATS(ret, a, b, fmts, nb, type, fail)
 Add all formats common for a and b to ret, copy the refs and destroy a and b. More...
 
#define MAKE_FORMAT_LIST(type, field, count_field)
 
#define ADD_FORMAT(f, fmt, unref_fn, type, list, nb)
 
#define FORMATS_REF(f, ref, unref_fn)
 
#define FIND_REF_INDEX(ref, idx)
 
#define FORMATS_UNREF(ref, list)
 
#define FORMATS_CHANGEREF(oldref, newref)
 
#define SET_COMMON_FORMATS(ctx, fmts, in_fmts, out_fmts, ref_fn, unref_fn, list)
 

Functions

AVFilterFormats * ff_merge_formats (AVFilterFormats *a, AVFilterFormats *b, enum AVMediaType type)
 Return a format list which contains the intersection of the formats of a and b. More...
 
AVFilterFormats * ff_merge_samplerates (AVFilterFormats *a, AVFilterFormats *b)
 
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. More...
 
int ff_fmt_is_in (int fmt, const int *fmts)
 Tell if an integer is contained in the provided -1-terminated list of integers. More...
 
AVFilterFormats * ff_make_format_list (const int *fmts)
 Create a list of supported formats. More...
 
AVFilterChannelLayouts * ff_make_formatu64_list (const uint64_t *fmts)
 
AVFilterChannelLayouts * avfilter_make_format64_list (const int64_t *fmts)
 
int ff_add_format (AVFilterFormats **avff, int64_t fmt)
 Add fmt to the list of media formats contained in *avff. More...
 
int ff_add_channel_layout (AVFilterChannelLayouts **l, uint64_t channel_layout)
 
AVFilterFormats * ff_all_formats (enum AVMediaType type)
 Return a list of all formats supported by FFmpeg for the given media type. More...
 
int ff_formats_pixdesc_filter (AVFilterFormats **rfmts, unsigned want, unsigned rej)
 Construct a formats list containing all pixel formats with certain properties. More...
 
AVFilterFormats * ff_planar_sample_fmts (void)
 Construct a formats list containing all planar sample formats. More...
 
AVFilterFormats * ff_all_samplerates (void)
 
AVFilterChannelLayouts * ff_all_channel_layouts (void)
 Construct an empty AVFilterChannelLayouts/AVFilterFormats struct – representing any channel layout (with known disposition)/sample rate. More...
 
AVFilterChannelLayouts * ff_all_channel_counts (void)
 Construct an AVFilterChannelLayouts coding for any channel layout, with known or unknown disposition. More...
 
int ff_channel_layouts_ref (AVFilterChannelLayouts *f, AVFilterChannelLayouts **ref)
 Add *ref as a new reference to f. More...
 
int ff_formats_ref (AVFilterFormats *f, 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_channel_layouts_unref (AVFilterChannelLayouts **ref)
 Remove a reference to a channel layouts list. More...
 
void ff_channel_layouts_changeref (AVFilterChannelLayouts **oldref, AVFilterChannelLayouts **newref)
 
void ff_formats_changeref (AVFilterFormats **oldref, AVFilterFormats **newref)
 
   Before                                 After

|formats |<------—. More...

 
int 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...
 
int ff_set_common_samplerates (AVFilterContext *ctx, AVFilterFormats *samplerates)
 
int ff_set_common_formats (AVFilterContext *ctx, AVFilterFormats *formats)
 A helper for query_formats() which sets all links to the same list of formats. More...
 
static int default_query_formats_common (AVFilterContext *ctx, AVFilterChannelLayouts *(layouts)(void))
 
int ff_default_query_formats (AVFilterContext *ctx)
 
int ff_query_formats_all_layouts (AVFilterContext *ctx)
 Set the formats list to all known channel layouts. More...
 
int ff_parse_pixel_format (enum AVPixelFormat *ret, const char *arg, void *log_ctx)
 Parse a pixel format. More...
 
int ff_parse_sample_format (int *ret, const char *arg, void *log_ctx)
 Parse a sample format name or a corresponding integer representation. More...
 
int ff_parse_time_base (AVRational *ret, const char *arg, void *log_ctx)
 Parse a time base. More...
 
int ff_parse_sample_rate (int *ret, const char *arg, void *log_ctx)
 Parse a sample rate. More...
 
int ff_parse_channel_layout (int64_t *ret, int *nret, const char *arg, void *log_ctx)
 Parse a channel layout or a corresponding integer representation. More...
 

Macro Definition Documentation

#define KNOWN (   l)    (!FF_LAYOUT2COUNT(l)) /* for readability */

Definition at line 32 of file formats.c.

Referenced by ff_merge_channel_layouts().

#define MERGE_REF (   ret,
  a,
  fmts,
  type,
  fail 
)
Value:
do { \
type ***tmp; \
int i; \
\
if (!(tmp = av_realloc_array(ret->refs, ret->refcount + a->refcount, \
sizeof(*tmp)))) \
goto fail; \
ret->refs = tmp; \
\
for (i = 0; i < a->refcount; i ++) { \
ret->refs[ret->refcount] = a->refs[i]; \
*ret->refs[ret->refcount++] = ret; \
} \
\
av_freep(&a->refs); \
av_freep(&a->fmts); \
av_freep(&a); \
} while (0)
ret
ret
Definition: filter_design.txt:187
a
The reader does not expect b to be semantically here and if the code is changed by maybe adding a a division or other the signedness will almost certainly be mistaken To avoid this confusion a new type was SUINT is the C unsigned type but it holds a signed int to use the same example SUINT a
Definition: undefined.txt:36
type
GLint GLenum type
Definition: opengl_enc.c:104
av_realloc_array
void * av_realloc_array(void *ptr, size_t nmemb, size_t size)
Definition: mem.c:198
fail
#define fail()
Definition: checkasm.h:123
if
if(ret)
Definition: filter_design.txt:179
int
int
Definition: ffmpeg_filter.c:192
av_freep
#define av_freep(p)
Definition: tableprint_vlc.h:35
for
for(j=16;j >0;--j)
Definition: h264pred_template.c:469
i
int i
Definition: input.c:407
tmp
static uint8_t tmp[11]
Definition: aes_ctr.c:26

Add all refs from a to ret and destroy a.

Definition at line 37 of file formats.c.

Referenced by ff_merge_channel_layouts(), and ff_merge_samplerates().

#define MERGE_FORMATS (   ret,
  a,
  b,
  fmts,
  nb,
  type,
  fail 
)
Value:
do { \
int i, j, k = 0, count = FFMIN(a->nb, b->nb); \
\
if (!(ret = av_mallocz(sizeof(*ret)))) \
goto fail; \
\
if (count) { \
if (!(ret->fmts = av_malloc_array(count, sizeof(*ret->fmts)))) \
goto fail; \
for (i = 0; i < a->nb; i++) \
for (j = 0; j < b->nb; j++) \
if (a->fmts[i] == b->fmts[j]) { \
if(k >= FFMIN(a->nb, b->nb)){ \
av_log(NULL, AV_LOG_ERROR, "Duplicate formats in %s detected\n", __FUNCTION__); \
av_free(ret->fmts); \
av_free(ret); \
return NULL; \
} \
ret->fmts[k++] = a->fmts[i]; \
} \
} \
ret->nb = k; \
/* check that there was at least one common format */ \
if (!ret->nb) \
goto fail; \
\
MERGE_REF(ret, a, fmts, type, fail); \
MERGE_REF(ret, b, fmts, type, fail); \
} while (0)
NULL
#define NULL
Definition: coverity.c:32
ret
ret
Definition: filter_design.txt:187
a
The reader does not expect b to be semantically here and if the code is changed by maybe adding a a division or other the signedness will almost certainly be mistaken To avoid this confusion a new type was SUINT is the C unsigned type but it holds a signed int to use the same example SUINT a
Definition: undefined.txt:36
type
GLint GLenum type
Definition: opengl_enc.c:104
av_mallocz
void * av_mallocz(size_t size)
Allocate a memory block with alignment suitable for all memory accesses (including vectors if availab...
Definition: mem.c:237
av_log
#define av_log(a,...)
Definition: tableprint_vlc.h:28
AV_LOG_ERROR
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:194
count
GLsizei count
Definition: opengl_enc.c:108
fail
#define fail()
Definition: checkasm.h:123
b
#define b
Definition: input.c:41
FFMIN
#define FFMIN(a, b)
Definition: common.h:96
if
if(ret)
Definition: filter_design.txt:179
int
int
Definition: ffmpeg_filter.c:192
av_free
#define av_free(p)
Definition: tableprint_vlc.h:34
return
these buffered frames must be flushed immediately if a new input produces new the filter must not call request_frame to get more It must just process the frame or queue it The task of requesting more frames is left to the filter s request_frame method or the application If a filter has several the filter must be ready for frames arriving randomly on any input any filter with several inputs will most likely require some kind of queuing mechanism It is perfectly acceptable to have a limited queue and to drop frames when the inputs are too unbalanced request_frame For filters that do not use the this method is called when a frame is wanted on an output For a it should directly call filter_frame on the corresponding output For a if there are queued frames already one of these frames should be pushed If the filter should request a frame on one of its repeatedly until at least one frame has been pushed Return or at least make progress towards producing a it should return
Definition: filter_design.txt:255
av_malloc_array
#define av_malloc_array(a, b)
Definition: tableprint_vlc.h:32
for
for(j=16;j >0;--j)
Definition: h264pred_template.c:469
i
int i
Definition: input.c:407
MERGE_REF
#define MERGE_REF(ret, a, fmts, type, fail)
Add all refs from a to ret and destroy a.
Definition: formats.c:37

Add all formats common for a and b to ret, copy the refs and destroy a and b.

Definition at line 61 of file formats.c.

Referenced by ff_merge_formats(), and ff_merge_samplerates().

#define MAKE_FORMAT_LIST (   type,
  field,
  count_field 
)
Value:
type *formats; \
int count = 0; \
if (fmts) \
for (count = 0; fmts[count] != -1; count++) \
; \
formats = av_mallocz(sizeof(*formats)); \
if (!formats) \
return NULL; \
formats->count_field = count; \
if (count) { \
formats->field = av_malloc_array(count, sizeof(*formats->field)); \
if (!formats->field) { \
av_freep(&formats); \
return NULL; \
} \
}
NULL
#define NULL
Definition: coverity.c:32
type
GLint GLenum type
Definition: opengl_enc.c:104
av_mallocz
void * av_mallocz(size_t size)
Allocate a memory block with alignment suitable for all memory accesses (including vectors if availab...
Definition: mem.c:237
count
GLsizei count
Definition: opengl_enc.c:108
if
if(ret)
Definition: filter_design.txt:179
int
int
Definition: ffmpeg_filter.c:192
return
these buffered frames must be flushed immediately if a new input produces new the filter must not call request_frame to get more It must just process the frame or queue it The task of requesting more frames is left to the filter s request_frame method or the application If a filter has several the filter must be ready for frames arriving randomly on any input any filter with several inputs will most likely require some kind of queuing mechanism It is perfectly acceptable to have a limited queue and to drop frames when the inputs are too unbalanced request_frame For filters that do not use the this method is called when a frame is wanted on an output For a it should directly call filter_frame on the corresponding output For a if there are queued frames already one of these frames should be pushed If the filter should request a frame on one of its repeatedly until at least one frame has been pushed Return or at least make progress towards producing a it should return
Definition: filter_design.txt:255
av_freep
#define av_freep(p)
Definition: tableprint_vlc.h:35
av_malloc_array
#define av_malloc_array(a, b)
Definition: tableprint_vlc.h:32
formats
formats
Definition: signature.h:48
for
for(j=16;j >0;--j)
Definition: h264pred_template.c:469

Definition at line 265 of file formats.c.

Referenced by avfilter_make_format64_list(), ff_make_format_list(), and ff_make_formatu64_list().

#define ADD_FORMAT (   f,
  fmt,
  unref_fn,
  type,
  list,
  nb 
)
Value:
do { \
type *fmts; \
void *oldf = *f; \
\
if (!(*f) && !(*f = av_mallocz(sizeof(**f)))) { \
return AVERROR(ENOMEM); \
} \
\
fmts = av_realloc_array((*f)->list, (*f)->nb + 1, \
sizeof(*(*f)->list)); \
if (!fmts) { \
unref_fn(f); \
if (!oldf) \
av_freep(f); \
return AVERROR(ENOMEM); \
} \
\
(*f)->list = fmts; \
(*f)->list[(*f)->nb++] = fmt; \
} while (0)
type
GLint GLenum type
Definition: opengl_enc.c:104
av_mallocz
void * av_mallocz(size_t size)
Allocate a memory block with alignment suitable for all memory accesses (including vectors if availab...
Definition: mem.c:237
f
#define f(width, name)
Definition: cbs_vp9.c:255
av_realloc_array
void * av_realloc_array(void *ptr, size_t nmemb, size_t size)
Definition: mem.c:198
void
typedef void(APIENTRY *FF_PFNGLACTIVETEXTUREPROC)(GLenum texture)
if
if(ret)
Definition: filter_design.txt:179
return
these buffered frames must be flushed immediately if a new input produces new the filter must not call request_frame to get more It must just process the frame or queue it The task of requesting more frames is left to the filter s request_frame method or the application If a filter has several the filter must be ready for frames arriving randomly on any input any filter with several inputs will most likely require some kind of queuing mechanism It is perfectly acceptable to have a limited queue and to drop frames when the inputs are too unbalanced request_frame For filters that do not use the this method is called when a frame is wanted on an output For a it should directly call filter_frame on the corresponding output For a if there are queued frames already one of these frames should be pushed If the filter should request a frame on one of its repeatedly until at least one frame has been pushed Return or at least make progress towards producing a it should return
Definition: filter_design.txt:255
av_freep
#define av_freep(p)
Definition: tableprint_vlc.h:35
AVERROR
Filter the word “frame” indicates either a video frame or a group of audio as stored in an AVFrame structure Format for each input and each output the list of supported formats For video that means pixel format For audio that means channel sample they are references to shared objects When the negotiation mechanism computes the intersection of the formats supported at each end of a all references to both lists are replaced with a reference to the intersection And when a single format is eventually chosen for a link amongst the remaining all references to the list are updated That means that if a filter requires that its input and output have the same format amongst a supported all it has to do is use a reference to the same list of formats query_formats can leave some formats unset and return AVERROR(EAGAIN) to cause the negotiation mechanism toagain later.That can be used by filters with complex requirements to use the format negotiated on one link to set the formats supported on another.Frame references ownership and permissions

Definition at line 314 of file formats.c.

Referenced by ff_add_channel_layout(), and ff_add_format().

#define FORMATS_REF (   f,
  ref,
  unref_fn 
)
Value:
void *tmp; \
\
if (!f || !ref) \
return AVERROR(ENOMEM); \
\
tmp = av_realloc_array(f->refs, sizeof(*f->refs), f->refcount + 1); \
if (!tmp) { \
unref_fn(&f); \
return AVERROR(ENOMEM); \
} \
f->refs = tmp; \
f->refs[f->refcount++] = ref; \
*ref = f; \
return 0
f
#define f(width, name)
Definition: cbs_vp9.c:255
av_realloc_array
void * av_realloc_array(void *ptr, size_t nmemb, size_t size)
Definition: mem.c:198
if
if(ret)
Definition: filter_design.txt:179
ref
static int ref[MAX_W *MAX_W]
Definition: jpeg2000dwt.c:107
return
these buffered frames must be flushed immediately if a new input produces new the filter must not call request_frame to get more It must just process the frame or queue it The task of requesting more frames is left to the filter s request_frame method or the application If a filter has several the filter must be ready for frames arriving randomly on any input any filter with several inputs will most likely require some kind of queuing mechanism It is perfectly acceptable to have a limited queue and to drop frames when the inputs are too unbalanced request_frame For filters that do not use the this method is called when a frame is wanted on an output For a it should directly call filter_frame on the corresponding output For a if there are queued frames already one of these frames should be pushed If the filter should request a frame on one of its repeatedly until at least one frame has been pushed Return or at least make progress towards producing a it should return
Definition: filter_design.txt:255
AVERROR
Filter the word “frame” indicates either a video frame or a group of audio as stored in an AVFrame structure Format for each input and each output the list of supported formats For video that means pixel format For audio that means channel sample they are references to shared objects When the negotiation mechanism computes the intersection of the formats supported at each end of a all references to both lists are replaced with a reference to the intersection And when a single format is eventually chosen for a link amongst the remaining all references to the list are updated That means that if a filter requires that its input and output have the same format amongst a supported all it has to do is use a reference to the same list of formats query_formats can leave some formats unset and return AVERROR(EAGAIN) to cause the negotiation mechanism toagain later.That can be used by filters with complex requirements to use the format negotiated on one link to set the formats supported on another.Frame references ownership and permissions
tmp
static uint8_t tmp[11]
Definition: aes_ctr.c:26

Definition at line 449 of file formats.c.

Referenced by ff_channel_layouts_ref(), and ff_formats_ref().

#define FIND_REF_INDEX (   ref,
  idx 
)
Value:
do { \
int i; \
for (i = 0; i < (*ref)->refcount; i ++) \
if((*ref)->refs[i] == ref) { \
idx = i; \
break; \
} \
} while (0)
int
int
Definition: ffmpeg_filter.c:192
ref
static int ref[MAX_W *MAX_W]
Definition: jpeg2000dwt.c:107
for
for(j=16;j >0;--j)
Definition: h264pred_template.c:469
i
int i
Definition: input.c:407

Definition at line 475 of file formats.c.

#define FORMATS_UNREF (   ref,
  list 
)
Value:
do { \
int idx = -1; \
\
if (!ref || !*ref || !(*ref)->refs) \
return; \
\
FIND_REF_INDEX(ref, idx); \
\
if (idx >= 0) \
memmove((*ref)->refs + idx, (*ref)->refs + idx + 1, \
sizeof(*(*ref)->refs) * ((*ref)->refcount - idx - 1)); \
\
if(!--(*ref)->refcount) { \
av_free((*ref)->list); \
av_free((*ref)->refs); \
av_free(*ref); \
} \
*ref = NULL; \
} while (0)
NULL
#define NULL
Definition: coverity.c:32
FIND_REF_INDEX
#define FIND_REF_INDEX(ref, idx)
Definition: formats.c:475
if
if(ret)
Definition: filter_design.txt:179
int
int
Definition: ffmpeg_filter.c:192
ref
static int ref[MAX_W *MAX_W]
Definition: jpeg2000dwt.c:107
av_free
#define av_free(p)
Definition: tableprint_vlc.h:34
return
these buffered frames must be flushed immediately if a new input produces new the filter must not call request_frame to get more It must just process the frame or queue it The task of requesting more frames is left to the filter s request_frame method or the application If a filter has several the filter must be ready for frames arriving randomly on any input any filter with several inputs will most likely require some kind of queuing mechanism It is perfectly acceptable to have a limited queue and to drop frames when the inputs are too unbalanced request_frame For filters that do not use the this method is called when a frame is wanted on an output For a it should directly call filter_frame on the corresponding output For a if there are queued frames already one of these frames should be pushed If the filter should request a frame on one of its repeatedly until at least one frame has been pushed Return or at least make progress towards producing a it should return
Definition: filter_design.txt:255

Definition at line 485 of file formats.c.

Referenced by ff_channel_layouts_unref(), and ff_formats_unref().

#define FORMATS_CHANGEREF (   oldref,
  newref 
)
Value:
do { \
int idx = -1; \
\
FIND_REF_INDEX(oldref, idx); \
\
if (idx >= 0) { \
(*oldref)->refs[idx] = newref; \
*newref = *oldref; \
*oldref = NULL; \
} \
} while (0)
NULL
#define NULL
Definition: coverity.c:32
FIND_REF_INDEX
#define FIND_REF_INDEX(ref, idx)
Definition: formats.c:475
if
if(ret)
Definition: filter_design.txt:179
int
int
Definition: ffmpeg_filter.c:192

Definition at line 516 of file formats.c.

Referenced by ff_channel_layouts_changeref(), and ff_formats_changeref().

#define SET_COMMON_FORMATS (   ctx,
  fmts,
  in_fmts,
  out_fmts,
  ref_fn,
  unref_fn,
  list 
)

Definition at line 540 of file formats.c.

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

Function Documentation

AVFilterFormats* ff_merge_formats ( AVFilterFormats *  a,
AVFilterFormats *  b,
enum AVMediaType  type 
)

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 92 of file formats.c.

Referenced by can_merge_formats(), and query_formats().

AVFilterFormats* ff_merge_samplerates ( AVFilterFormats *  a,
AVFilterFormats *  b 
)

Definition at line 139 of file formats.c.

Referenced by can_merge_formats(), and 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 166 of file formats.c.

Referenced by query_formats().

int ff_fmt_is_in ( int  fmt,
const int *  fmts 
)

Tell if an integer is contained in the provided -1-terminated list of integers.

This is useful for determining (for instance) if an AVPixelFormat is in an array of supported formats.

Parameters
fmtprovided format
fmts-1-terminated list of formats
Returns
1 if present, 0 if absent

Definition at line 254 of file formats.c.

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

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 283 of file formats.c.

Referenced by aeval_query_formats(), cudascale_query_formats(), cudaupload_query_formats(), deint_cuda_query_formats(), ff_opencl_filter_query_formats(), ff_vaapi_vpp_query_formats(), ff_vk_filter_query_formats(), gate(), geq_query_formats(), hwupload_query_formats(), movie_query_formats(), nppscale_query_formats(), npptranspose_query_formats(), overlay_cuda_query_formats(), overlay_qsv_query_formats(), pp_query_formats(), process_command(), qsvdeint_query_formats(), qsvscale_query_formats(), query_formats(), query_formats_src(), request_frame(), and uninit().

AVFilterChannelLayouts* ff_make_formatu64_list ( const uint64_t *  fmts)

Definition at line 292 of file formats.c.

AVFilterChannelLayouts* avfilter_make_format64_list ( const int64_t *  fmts)

Definition at line 303 of file formats.c.

Referenced by movie_query_formats(), and query_formats().

int ff_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 336 of file formats.c.

Referenced by asink_query_formats(), ff_all_formats(), ff_draw_supported_pixel_formats(), ff_planar_sample_fmts(), gate(), hwdownload_query_formats(), hwupload_query_formats(), init(), query_formats(), reduce_formats_on_filter(), and vsink_query_formats().

int ff_add_channel_layout ( AVFilterChannelLayouts **  l,
uint64_t  channel_layout 
)

Definition at line 342 of file formats.c.

Referenced by aeval_query_formats(), asink_query_formats(), channelmap_query_formats(), gate(), init(), join_query_formats(), process_command(), query_formats(), and reduce_formats_on_filter().

AVFilterFormats* ff_all_formats ( enum AVMediaType  type)

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

Definition at line 349 of file formats.c.

Referenced by default_query_formats_common(), filter_frame(), filter_query_formats(), hwmap_query_formats(), and query_formats().

int ff_formats_pixdesc_filter ( AVFilterFormats **  rfmts,
unsigned  want,
unsigned  rej 
)

Construct a formats list containing all pixel formats with certain properties.

Definition at line 371 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 412 of file formats.c.

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

AVFilterFormats* ff_all_samplerates ( void  )

Definition at line 425 of file formats.c.

Referenced by aeval_query_formats(), channelmap_query_formats(), default_query_formats_common(), filter_frame(), filter_query_formats(), gate(), join_query_formats(), process_command(), and query_formats().

AVFilterChannelLayouts* ff_all_channel_layouts ( void  )

Construct an empty AVFilterChannelLayouts/AVFilterFormats struct – representing any channel layout (with known disposition)/sample rate.

Definition at line 431 of file formats.c.

Referenced by ff_query_formats_all_layouts(), filter_query_formats(), join_query_formats(), and query_formats().

AVFilterChannelLayouts* ff_all_channel_counts ( void  )

Construct an AVFilterChannelLayouts coding for any channel layout, with known or unknown disposition.

Definition at line 440 of file formats.c.

Referenced by aeval_query_formats(), asink_query_formats(), channelmap_query_formats(), ff_default_query_formats(), filter_frame(), gate(), process_command(), and query_formats().

int ff_channel_layouts_ref ( AVFilterChannelLayouts *  f,
AVFilterChannelLayouts **  ref 
)

Add *ref as a new reference to f.

Definition at line 465 of file formats.c.

Referenced by aeval_query_formats(), channelmap_query_formats(), ff_set_common_channel_layouts(), gate(), join_query_formats(), movie_query_formats(), process_command(), and query_formats().

int 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 470 of file formats.c.

Referenced by cudaupload_query_formats(), deint_cuda_query_formats(), ff_set_common_formats(), ff_set_common_samplerates(), ff_vaapi_vpp_query_formats(), hwdownload_query_formats(), hwmap_query_formats(), hwupload_query_formats(), movie_query_formats(), overlay_qsv_query_formats(), query_formats(), and query_formats_src().

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 506 of file formats.c.

Referenced by ff_add_format(), ff_formats_ref(), ff_set_common_formats(), ff_set_common_samplerates(), free_link(), hwdownload_query_formats(), init(), pick_format(), query_formats(), and reduce_formats_on_filter().

void ff_channel_layouts_unref ( AVFilterChannelLayouts **  ref)

Remove a reference to a channel layouts list.

Definition at line 511 of file formats.c.

Referenced by ff_add_channel_layout(), ff_channel_layouts_ref(), ff_set_common_channel_layouts(), free_link(), init(), and pick_format().

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

Definition at line 529 of file formats.c.

Referenced by avfilter_insert_filter().

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

   Before                                 After

|formats |<------—.

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

Definition at line 535 of file formats.c.

Referenced by avfilter_insert_filter().

int 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 581 of file formats.c.

Referenced by aeval_query_formats(), asink_query_formats(), default_query_formats_common(), filter_frame(), filter_query_formats(), gate(), process_command(), and query_formats().

int ff_set_common_samplerates ( AVFilterContext *  ctx,
AVFilterFormats *  samplerates 
)

Definition at line 588 of file formats.c.

Referenced by aeval_query_formats(), asink_query_formats(), channelmap_query_formats(), default_query_formats_common(), filter_frame(), filter_query_formats(), gate(), join_query_formats(), process_command(), and query_formats().

int 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 600 of file formats.c.

Referenced by aeval_query_formats(), asink_query_formats(), channelmap_query_formats(), cudascale_query_formats(), default_query_formats_common(), ff_opencl_filter_query_formats(), ff_vk_filter_query_formats(), filter_frame(), filter_query_formats(), gate(), geq_query_formats(), join_query_formats(), nppscale_query_formats(), npptranspose_query_formats(), overlay_cuda_query_formats(), pp_query_formats(), process_command(), qsvdeint_query_formats(), qsvscale_query_formats(), query_formats(), request_frame(), uninit(), and vsink_query_formats().

static int default_query_formats_common ( AVFilterContext *  ctx,
AVFilterChannelLayouts *  layouts)(void 
)
static

Definition at line 606 of file formats.c.

Referenced by ff_default_query_formats(), and ff_query_formats_all_layouts().

int ff_default_query_formats ( AVFilterContext *  ctx)

Definition at line 629 of file formats.c.

Referenced by main(), query_formats(), uninit(), and vsink_query_formats().

int ff_query_formats_all_layouts ( AVFilterContext *  ctx)

Set the formats list to all known channel layouts.

This function behaves like ff_default_query_formats(), except it only accepts known channel layouts. It should only be used with audio filters.

Definition at line 634 of file formats.c.

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

Parse a pixel format.

Parameters
retpixel format pointer to where the value should be written
argstring to parse
log_ctxlog context
Returns
>= 0 in case of success, a negative AVERROR code on error

Definition at line 641 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
retinteger pointer to where the value should be written
argstring to parse
log_ctxlog context
Returns
>= 0 in case of success, a negative AVERROR code on error

Definition at line 656 of file formats.c.

int ff_parse_time_base ( AVRational *  ret,
const char *  arg,
void *  log_ctx 
)

Parse a time base.

Parameters
retunsigned AVRational pointer to where the value should be written
argstring to parse
log_ctxlog context
Returns
>= 0 in case of success, a negative AVERROR code on error

Definition at line 671 of file formats.c.

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

Parse a sample rate.

Parameters
retunsigned integer pointer to where the value should be written
argstring to parse
log_ctxlog context
Returns
>= 0 in case of success, a negative AVERROR code on error

Definition at line 682 of file formats.c.

Referenced by init().

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

Parse a channel layout or a corresponding integer representation.

Parameters
ret64bit integer pointer to where the value should be written.
nretinteger pointer to the number of channels; if not NULL, then unknown channel layouts are accepted
argstring to parse
log_ctxlog context
Returns
>= 0 in case of success, a negative AVERROR code on error

Definition at line 694 of file formats.c.

Referenced by init(), and main().

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