#include "libavutil/avutil.h"#include "libavutil/log.h"#include "libavutil/samplefmt.h"#include "libavutil/pixfmt.h"#include "libavutil/rational.h"#include "libavcodec/avcodec.h"#include <stddef.h>#include "libavfilter/version.h"Go to the source code of this file.
Data Structures | |
| struct | AVFilterBuffer |
| A reference-counted buffer data type used by the filter system. More... | |
| struct | AVFilterBufferRefAudioProps |
| Audio specific properties in a reference to an AVFilterBuffer. More... | |
| struct | AVFilterBufferRefVideoProps |
| Video specific properties in a reference to an AVFilterBuffer. More... | |
| struct | AVFilterBufferRef |
| A reference to an AVFilterBuffer. More... | |
| struct | AVFilterFormats |
| A list of supported formats for one end of a filter link. More... | |
| struct | AVFilterPad |
| A filter pad used for either input or output. More... | |
| struct | AVFilter |
| Filter definition. More... | |
| struct | AVFilterContext |
| An instance of a filter. More... | |
| struct | AVFilterLink |
| A link between two filters. More... | |
Defines | |
| #define | FF_API_OLD_VSINK_API (LIBAVFILTER_VERSION_MAJOR < 3) |
| #define | FF_API_OLD_ALL_FORMATS_API (LIBAVFILTER_VERSION_MAJOR < 3) |
| #define | AV_PERM_READ 0x01 |
| can read from the buffer | |
| #define | AV_PERM_WRITE 0x02 |
| can write to the buffer | |
| #define | AV_PERM_PRESERVE 0x04 |
| nobody else can overwrite the buffer | |
| #define | AV_PERM_REUSE 0x08 |
| can output the buffer multiple times, with the same contents each time | |
| #define | AV_PERM_REUSE2 0x10 |
| can output the buffer multiple times, modified each time | |
| #define | AV_PERM_NEG_LINESIZES 0x20 |
| the buffer requested can have negative linesizes | |
| #define | AV_PERM_ALIGN 0x40 |
| the buffer must be aligned | |
| #define | AVFILTER_ALIGN 16 |
| #define | AVFILTER_CMD_FLAG_ONE 1 |
| Stop once a filter understood the command (for target=all for example), fast filters are favored automatically. | |
| #define | AVFILTER_CMD_FLAG_FAST 2 |
| Only execute command when its fast (like a video out that supports contrast adjustment in hw). | |
Typedefs | |
| typedef struct AVFilterContext | AVFilterContext |
| typedef struct AVFilterLink | AVFilterLink |
| typedef struct AVFilterPad | AVFilterPad |
Enumerations | |
| enum | AVFilterPacking { AVFILTER_PACKED = 0, AVFILTER_PLANAR } |
Functions | |
| unsigned | avfilter_version (void) |
| Return the LIBAVFILTER_VERSION_INT constant. | |
| const char * | avfilter_configuration (void) |
| Return the libavfilter build-time configuration. | |
| const char * | avfilter_license (void) |
| Return the libavfilter license. | |
| void | avfilter_copy_buffer_ref_props (AVFilterBufferRef *dst, AVFilterBufferRef *src) |
| Copy properties of src to dst, without copying the actual data. | |
| AVFilterBufferRef * | avfilter_ref_buffer (AVFilterBufferRef *ref, int pmask) |
| Add a new reference to a buffer. | |
| void | avfilter_unref_buffer (AVFilterBufferRef *ref) |
| Remove a reference to a buffer. | |
| void | avfilter_unref_bufferp (AVFilterBufferRef **ref) |
| Remove a reference to a buffer and set the pointer to NULL. | |
| AVFilterFormats * | avfilter_make_format_list (const int *fmts) |
| Create a list of supported formats. | |
| int | avfilter_add_format (AVFilterFormats **avff, int64_t fmt) |
| Add fmt to the list of media formats contained in *avff. | |
| attribute_deprecated 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_packing_formats (void) |
| Return a list of all audio packing formats. | |
| AVFilterFormats * | avfilter_merge_formats (AVFilterFormats *a, AVFilterFormats *b) |
| Return a format list which contains the intersection of the formats of a and b. | |
| void | avfilter_formats_ref (AVFilterFormats *formats, AVFilterFormats **ref) |
| Add *ref as a new reference to 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. | |
| void | avfilter_formats_changeref (AVFilterFormats **oldref, AVFilterFormats **newref) |
| Before After ________ ________ |formats |<---------. | |
| attribute_deprecated void | avfilter_default_start_frame (AVFilterLink *link, AVFilterBufferRef *picref) |
| default handler for start_frame() for video inputs | |
| attribute_deprecated void | avfilter_default_draw_slice (AVFilterLink *link, int y, int h, int slice_dir) |
| default handler for draw_slice() for video inputs | |
| attribute_deprecated void | avfilter_default_end_frame (AVFilterLink *link) |
| default handler for end_frame() for video inputs | |
| attribute_deprecated AVFilterBufferRef * | avfilter_default_get_video_buffer (AVFilterLink *link, int perms, int w, int h) |
| default handler for get_video_buffer() for video inputs | |
| attribute_deprecated int | avfilter_default_query_formats (AVFilterContext *ctx) |
| Default handler for query_formats(). | |
| void | avfilter_set_common_formats (AVFilterContext *ctx, AVFilterFormats *formats) |
| Helpers for query_formats() which set all links to the same list of formats/layouts. | |
| void | avfilter_set_common_pixel_formats (AVFilterContext *ctx, AVFilterFormats *formats) |
| void | avfilter_set_common_sample_formats (AVFilterContext *ctx, AVFilterFormats *formats) |
| void | avfilter_set_common_channel_layouts (AVFilterContext *ctx, AVFilterFormats *formats) |
| void | avfilter_set_common_packing_formats (AVFilterContext *ctx, AVFilterFormats *formats) |
| attribute_deprecated void | avfilter_null_start_frame (AVFilterLink *link, AVFilterBufferRef *picref) |
| start_frame() handler for filters which simply pass video along | |
| attribute_deprecated void | avfilter_null_draw_slice (AVFilterLink *link, int y, int h, int slice_dir) |
| draw_slice() handler for filters which simply pass video along | |
| attribute_deprecated void | avfilter_null_end_frame (AVFilterLink *link) |
| end_frame() handler for filters which simply pass video along | |
| attribute_deprecated AVFilterBufferRef * | avfilter_null_get_video_buffer (AVFilterLink *link, int perms, int w, int h) |
| get_video_buffer() handler for filters which simply pass video along | |
| int | avfilter_link (AVFilterContext *src, unsigned srcpad, AVFilterContext *dst, unsigned dstpad) |
| Link two filters together. | |
| void | avfilter_link_free (AVFilterLink **link) |
| Free the link in *link, and set its pointer to NULL. | |
| int | avfilter_config_links (AVFilterContext *filter) |
| Negotiate the media format, dimensions, etc of all inputs to a filter. | |
| AVFilterBufferRef * | avfilter_get_video_buffer (AVFilterLink *link, int perms, int w, int h) |
| Request a picture buffer with a specific set of permissions. | |
| AVFilterBufferRef * | avfilter_get_video_buffer_ref_from_arrays (uint8_t *const data[4], const int linesize[4], int perms, int w, int h, enum PixelFormat format) |
| Create a buffer reference wrapped around an already allocated image buffer. | |
| AVFilterBufferRef * | avfilter_get_audio_buffer_ref_from_arrays (uint8_t **data, int linesize, int perms, int nb_samples, enum AVSampleFormat sample_fmt, uint64_t channel_layout) |
| Create an audio buffer reference wrapped around an already allocated samples buffer. | |
| int | avfilter_request_frame (AVFilterLink *link) |
| Request an input frame from the filter at the other end of the link. | |
| int | avfilter_poll_frame (AVFilterLink *link) |
| Poll a frame from the filter chain. | |
| void | avfilter_start_frame (AVFilterLink *link, AVFilterBufferRef *picref) |
| Notify the next filter of the start of a frame. | |
| void | avfilter_end_frame (AVFilterLink *link) |
| Notify the next filter that the current frame has finished. | |
| void | avfilter_draw_slice (AVFilterLink *link, int y, int h, int slice_dir) |
| Send a slice to the next filter. | |
| int | avfilter_process_command (AVFilterContext *filter, const char *cmd, const char *arg, char *res, int res_len, int flags) |
| Make the filter instance process a command. | |
| void | avfilter_register_all (void) |
| Initialize the filter system. | |
| void | avfilter_uninit (void) |
| Uninitialize the filter system. | |
| int | avfilter_register (AVFilter *filter) |
| Register a filter. | |
| AVFilter * | avfilter_get_by_name (const char *name) |
| Get a filter definition matching the given name. | |
| AVFilter ** | av_filter_next (AVFilter **filter) |
| If filter is NULL, returns a pointer to the first registered filter pointer, if filter is non-NULL, returns the next pointer after filter. | |
| int | avfilter_open (AVFilterContext **filter_ctx, AVFilter *filter, const char *inst_name) |
| Create a filter instance. | |
| int | avfilter_init_filter (AVFilterContext *filter, const char *args, void *opaque) |
| Initialize a filter. | |
| void | avfilter_free (AVFilterContext *filter) |
| Free a filter context. | |
| int | avfilter_insert_filter (AVFilterLink *link, AVFilterContext *filt, unsigned filt_srcpad_idx, unsigned filt_dstpad_idx) |
| Insert a filter in the middle of an existing link. | |
| void | avfilter_insert_pad (unsigned idx, unsigned *count, size_t padidx_off, AVFilterPad **pads, AVFilterLink ***links, AVFilterPad *newpad) |
| Insert a new pad. | |
| static void | avfilter_insert_inpad (AVFilterContext *f, unsigned index, AVFilterPad *p) |
| Insert a new input pad for the filter. | |
| static void | avfilter_insert_outpad (AVFilterContext *f, unsigned index, AVFilterPad *p) |
| Insert a new output pad for the filter. | |
Variables | |
| const int64_t | avfilter_all_channel_layouts [] |
| A list of all channel layouts supported by libavfilter. | |
| #define AV_PERM_ALIGN 0x40 |
the buffer must be aligned
Definition at line 111 of file avfilter.h.
Referenced by get_video_buffer(), and start_frame().
| #define AV_PERM_NEG_LINESIZES 0x20 |
the buffer requested can have negative linesizes
Definition at line 110 of file avfilter.h.
Referenced by avfilter_start_frame(), ff_get_ref_perms_string(), get_video_buffer(), and start_frame().
| #define AV_PERM_PRESERVE 0x04 |
nobody else can overwrite the buffer
Definition at line 107 of file avfilter.h.
Referenced by decode_video(), ff_get_ref_perms_string(), filter_samples(), return_frame(), and start_frame().
| #define AV_PERM_READ 0x01 |
can read from the buffer
Definition at line 105 of file avfilter.h.
Referenced by avfilter_get_audio_buffer_ref_from_arrays(), avfilter_get_video_buffer_ref_from_arrays(), decode_video(), end_frame(), ff_default_get_video_buffer(), ff_get_ref_perms_string(), filter_samples(), request_frame(), start_frame(), and vf_next_put_image().
| #define AV_PERM_REUSE 0x08 |
can output the buffer multiple times, with the same contents each time
Definition at line 108 of file avfilter.h.
Referenced by ff_get_ref_perms_string(), return_frame(), and start_frame().
| #define AV_PERM_REUSE2 0x10 |
can output the buffer multiple times, modified each time
Definition at line 109 of file avfilter.h.
Referenced by ff_get_ref_perms_string(), and vf_next_put_image().
| #define AV_PERM_WRITE 0x02 |
can write to the buffer
Definition at line 106 of file avfilter.h.
Referenced by av_asrc_buffer_add_samples(), av_buffersrc_add_frame(), color_request_frame(), copy_buffer_ref(), default_start_frame(), end_frame(), ff_default_filter_samples(), ff_get_ref_perms_string(), filter_samples(), output_frame(), read_from_fifo(), request_frame(), return_frame(), source_request_frame(), start_frame(), and vf_next_put_image().
| #define AVFILTER_ALIGN 16 |
| #define AVFILTER_CMD_FLAG_FAST 2 |
Only execute command when its fast (like a video out that supports contrast adjustment in hw).
Definition at line 884 of file avfilter.h.
Referenced by avfilter_graph_send_command().
| #define AVFILTER_CMD_FLAG_ONE 1 |
Stop once a filter understood the command (for target=all for example), fast filters are favored automatically.
Definition at line 883 of file avfilter.h.
Referenced by avfilter_graph_queue_command(), avfilter_graph_send_command(), and transcode().
| #define FF_API_OLD_ALL_FORMATS_API (LIBAVFILTER_VERSION_MAJOR < 3) |
Definition at line 37 of file avfilter.h.
| #define FF_API_OLD_VSINK_API (LIBAVFILTER_VERSION_MAJOR < 3) |
Definition at line 34 of file avfilter.h.
| typedef struct AVFilterContext AVFilterContext |
Definition at line 60 of file avfilter.h.
| typedef struct AVFilterLink AVFilterLink |
Definition at line 61 of file avfilter.h.
| typedef struct AVFilterPad AVFilterPad |
Definition at line 62 of file avfilter.h.
| enum AVFilterPacking |
If filter is NULL, returns a pointer to the first registered filter pointer, if filter is non-NULL, returns the next pointer after filter.
If the returned pointer points to NULL, the last registered filter was already reached.
Definition at line 350 of file avfilter.c.
Referenced by opt_filters().
| 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.
Definition at line 253 of file formats.c.
Referenced by avfilter_make_all_formats(), init(), query_formats(), and reduce_formats_on_filter().
| attribute_deprecated AVFilterFormats* avfilter_all_formats | ( | enum AVMediaType | type | ) |
Definition at line 264 of file formats.c.
Referenced by ff_default_query_formats(), and query_formats().
| int avfilter_config_links | ( | AVFilterContext * | filter | ) |
Negotiate the media format, dimensions, etc of all inputs to a filter.
| filter | the filter to negotiate the properties for its inputs |
Definition at line 158 of file avfilter.c.
Referenced by avfilter_config_links(), and ff_avfilter_graph_config_links().
| const char* avfilter_configuration | ( | void | ) |
| void avfilter_copy_buffer_ref_props | ( | AVFilterBufferRef * | dst, | |
| AVFilterBufferRef * | src | |||
| ) |
Copy properties of src to dst, without copying the actual data.
Definition at line 237 of file buffer.c.
Referenced by avfilter_start_frame(), copy_buffer_ref(), default_start_frame(), end_frame(), filter_samples(), return_frame(), and start_frame().
| attribute_deprecated void avfilter_default_draw_slice | ( | AVFilterLink * | link, | |
| int | y, | |||
| int | h, | |||
| int | slice_dir | |||
| ) |
| attribute_deprecated void avfilter_default_end_frame | ( | AVFilterLink * | link | ) |
default handler for end_frame() for video inputs
Definition at line 365 of file video.c.
Referenced by end_frame().
| attribute_deprecated AVFilterBufferRef* avfilter_default_get_video_buffer | ( | AVFilterLink * | link, | |
| int | perms, | |||
| int | w, | |||
| int | h | |||
| ) |
default handler for get_video_buffer() for video inputs
Definition at line 357 of file video.c.
Referenced by get_video_buffer().
| attribute_deprecated int avfilter_default_query_formats | ( | AVFilterContext * | ctx | ) |
| attribute_deprecated void avfilter_default_start_frame | ( | AVFilterLink * | link, | |
| AVFilterBufferRef * | picref | |||
| ) |
| void avfilter_draw_slice | ( | AVFilterLink * | link, | |
| int | y, | |||
| int | h, | |||
| int | slice_dir | |||
| ) |
Send a slice to the next filter.
Slices have to be provided in sequential order, either in top-bottom or bottom-top order. If slices are provided in non-sequential order the behavior of the function is undefined.
| link | the output link over which the frame is being sent | |
| y | offset in pixels from the top of the image for this slice | |
| h | height of this slice in pixels | |
| slice_dir | the assumed direction for sending slices, from the top slice to the bottom slice if the value is 1, from the bottom slice to the top slice if the value is -1, for other values the behavior of the function is undefined. |
Definition at line 315 of file video.c.
Referenced by color_request_frame(), default_draw_slice(), draw_send_bar_slice(), draw_slice(), end_frame(), end_last_frame(), ff_null_draw_slice(), request_frame(), return_frame(), and vf_next_put_image().
| void avfilter_end_frame | ( | AVFilterLink * | link | ) |
Notify the next filter that the current frame has finished.
| link | the output link the frame was sent over |
Definition at line 282 of file video.c.
Referenced by color_request_frame(), default_end_frame(), end_frame(), end_last_frame(), ff_null_end_frame(), request_frame(), return_frame(), and vf_next_put_image().
| void avfilter_formats_changeref | ( | AVFilterFormats ** | oldref, | |
| AVFilterFormats ** | newref | |||
| ) |
Before After ________ ________ |formats |<---------.
|formats |<---------. | ____ | ___|___ | ____ | ___|___ | |refs| | | | | | |refs| | | | | NULL | |* *--------->|*oldref| | |* *--------->|*newref| ^ | |* * | | |_______| | |* * | | |_______| ___|___ | |____| | | |____| | | | | |________| |________| |*oldref| |_______|
Definition at line 397 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 332 of file formats.c.
Referenced by avfilter_set_common_formats(), ff_set_common_samplerates(), 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 368 of file formats.c.
Referenced by avfilter_free(), pick_format(), and query_formats().
| void avfilter_free | ( | AVFilterContext * | filter | ) |
Free a filter context.
| filter | the filter to free |
Definition at line 440 of file avfilter.c.
Referenced by avfilter_graph_create_filter(), avfilter_graph_free(), avfilter_graph_parse(), avfilter_graph_parse2(), create_filter(), and main().
| AVFilterBufferRef* avfilter_get_audio_buffer_ref_from_arrays | ( | uint8_t ** | data, | |
| int | linesize, | |||
| int | perms, | |||
| int | nb_samples, | |||
| enum AVSampleFormat | sample_fmt, | |||
| uint64_t | channel_layout | |||
| ) |
Create an audio buffer reference wrapped around an already allocated samples buffer.
| data | pointers to the samples plane buffers | |
| linesize | linesize for the samples plane buffers | |
| perms | the required access permissions | |
| nb_samples | number of samples per channel | |
| sample_fmt | the format of each sample in the buffer to allocate | |
| channel_layout | the channel layout of the buffer |
Definition at line 83 of file audio.c.
Referenced by av_asrc_buffer_add_samples(), avfilter_get_audio_buffer_ref_from_frame(), and ff_default_get_audio_buffer().
| AVFilter* avfilter_get_by_name | ( | const char * | name | ) |
Get a filter definition matching the given name.
| name | the filter name to find |
Definition at line 325 of file avfilter.c.
Referenced by configure_complex_filter(), configure_output_audio_filter(), configure_output_video_filter(), configure_video_filters(), create_filter(), DEF_CHOOSE_FORMAT(), init_filters(), insert_conv_filter(), lavfi_read_header(), main(), and query_formats().
| AVFilterBufferRef* avfilter_get_video_buffer | ( | AVFilterLink * | link, | |
| int | perms, | |||
| int | w, | |||
| int | h | |||
| ) |
Request a picture buffer with a specific set of permissions.
| link | the output link to the filter from which the buffer will be requested | |
| perms | the required access permissions | |
| w | the minimum width of the buffer to allocate | |
| h | the minimum height of the buffer to allocate |
Definition at line 170 of file video.c.
Referenced by avfilter_start_frame(), color_request_frame(), copy_buffer_ref(), default_start_frame(), end_frame(), ff_null_get_video_buffer(), get_video_buffer(), request_frame(), return_frame(), source_request_frame(), and start_frame().
| AVFilterBufferRef* avfilter_get_video_buffer_ref_from_arrays | ( | uint8_t *const | data[4], | |
| const int | linesize[4], | |||
| int | perms, | |||
| int | w, | |||
| int | h, | |||
| enum PixelFormat | format | |||
| ) |
Create a buffer reference wrapped around an already allocated image buffer.
| data | pointers to the planes of the image to reference | |
| linesize | linesizes for the planes of the image to reference | |
| perms | the required access permissions | |
| w | the width of the image specified by the data and linesize arrays | |
| h | the height of the image specified by the data and linesize arrays | |
| format | the pixel format of the image specified by the data and linesize arrays |
Definition at line 126 of file video.c.
Referenced by avfilter_get_video_buffer_ref_from_frame(), decode_video(), and ff_default_get_video_buffer().
| int avfilter_init_filter | ( | AVFilterContext * | filter, | |
| const char * | args, | |||
| void * | opaque | |||
| ) |
Initialize a filter.
| filter | the filter to initialize | |
| args | A string of parameters to use when initializing the filter. The format and meaning of this string varies by filter. | |
| opaque | Any extra non-string data needed by the filter. The meaning of this parameter varies by filter. |
Definition at line 490 of file avfilter.c.
Referenced by avfilter_graph_create_filter(), create_filter(), and main().
| int avfilter_insert_filter | ( | AVFilterLink * | link, | |
| AVFilterContext * | filt, | |||
| unsigned | filt_srcpad_idx, | |||
| unsigned | filt_dstpad_idx | |||
| ) |
Insert a filter in the middle of an existing link.
| link | the link into which the filter should be inserted | |
| filt | the filter to be inserted | |
| filt_srcpad_idx | the input pad on the filter to connect | |
| filt_dstpad_idx | the output pad on the filter to connect |
Definition at line 121 of file avfilter.c.
Referenced by insert_conv_filter(), and query_formats().
| static void avfilter_insert_inpad | ( | AVFilterContext * | f, | |
| unsigned | index, | |||
| AVFilterPad * | p | |||
| ) | [inline, static] |
Insert a new input pad for the filter.
Definition at line 987 of file avfilter.h.
Referenced by init().
| static void avfilter_insert_outpad | ( | AVFilterContext * | f, | |
| unsigned | index, | |||
| AVFilterPad * | p | |||
| ) | [inline, static] |
Insert a new output pad for the filter.
Definition at line 995 of file avfilter.h.
Referenced by split_init().
| void avfilter_insert_pad | ( | unsigned | idx, | |
| unsigned * | count, | |||
| size_t | padidx_off, | |||
| AVFilterPad ** | pads, | |||
| AVFilterLink *** | links, | |||
| AVFilterPad * | newpad | |||
| ) |
Insert a new pad.
| idx | Insertion point. Pad is inserted at the end if this point is beyond the end of the list of pads. | |
| count | Pointer to the number of pads in the list | |
| padidx_off | Offset within an AVFilterLink structure to the element to increment when inserting a new pad causes link numbering to change | |
| pads | Pointer to the pointer to the beginning of the list of pads | |
| links | Pointer to the pointer to the beginning of the list of links | |
| newpad | The new pad to add. A copy is made when adding. |
Definition at line 59 of file avfilter.c.
Referenced by avfilter_insert_inpad(), and avfilter_insert_outpad().
| const char* avfilter_license | ( | void | ) |
| int avfilter_link | ( | AVFilterContext * | src, | |
| unsigned | srcpad, | |||
| AVFilterContext * | dst, | |||
| unsigned | dstpad | |||
| ) |
Link two filters together.
| src | the source filter | |
| srcpad | index of the output pad on the source filter | |
| dst | the destination filter | |
| dstpad | index of the input pad on the destination filter |
Definition at line 80 of file avfilter.c.
Referenced by avfilter_graph_parse(), avfilter_insert_filter(), configure_complex_filter(), configure_output_audio_filter(), configure_output_video_filter(), configure_simple_filtergraph(), configure_video_filters(), DEF_CHOOSE_FORMAT(), lavfi_read_header(), and link_filter().
| void avfilter_link_free | ( | AVFilterLink ** | link | ) |
Free the link in *link, and set its pointer to NULL.
Definition at line 110 of file avfilter.c.
Referenced by avfilter_free().
| 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 270 of file formats.c.
Referenced by avfilter_all_formats(), and query_formats().
| AVFilterFormats* avfilter_make_all_packing_formats | ( | void | ) |
| AVFilterFormats* avfilter_make_format_list | ( | const int * | fmts | ) |
Create a list of supported formats.
This is intended for use in AVFilter->query_formats().
| fmts | list of media formats, terminated by -1. If NULL an empty list is created. |
Definition at line 216 of file formats.c.
Referenced by avfilter_make_all_packing_formats(), ff_draw_supported_pixel_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 88 of file formats.c.
Referenced by insert_conv_filter(), and query_formats().
| attribute_deprecated void avfilter_null_draw_slice | ( | AVFilterLink * | link, | |
| int | y, | |||
| int | h, | |||
| int | slice_dir | |||
| ) |
draw_slice() handler for filters which simply pass video along
| attribute_deprecated void avfilter_null_end_frame | ( | AVFilterLink * | link | ) |
end_frame() handler for filters which simply pass video along
| attribute_deprecated AVFilterBufferRef* avfilter_null_get_video_buffer | ( | AVFilterLink * | link, | |
| int | perms, | |||
| int | w, | |||
| int | h | |||
| ) |
get_video_buffer() handler for filters which simply pass video along
| attribute_deprecated void avfilter_null_start_frame | ( | AVFilterLink * | link, | |
| AVFilterBufferRef * | picref | |||
| ) |
start_frame() handler for filters which simply pass video along
| int avfilter_open | ( | AVFilterContext ** | filter_ctx, | |
| AVFilter * | filter, | |||
| const char * | inst_name | |||
| ) |
Create a filter instance.
| filter_ctx | put here a pointer to the created filter context on success, NULL on failure | |
| filter | the filter to create an instance of | |
| inst_name | Name to give to the new instance. Can be NULL for none. |
Definition at line 382 of file avfilter.c.
Referenced by avfilter_graph_create_filter(), create_filter(), and main().
| int avfilter_poll_frame | ( | AVFilterLink * | link | ) |
Poll a frame from the filter chain.
| link | the input link |
Definition at line 281 of file avfilter.c.
Referenced by av_buffersink_poll_frame(), av_buffersink_read(), avfilter_poll_frame(), main(), and poll_frame().
| int avfilter_process_command | ( | AVFilterContext * | filter, | |
| const char * | cmd, | |||
| const char * | arg, | |||
| char * | res, | |||
| int | res_len, | |||
| int | flags | |||
| ) |
Make the filter instance process a command.
It is recommended to use avfilter_graph_send_command().
Definition at line 308 of file avfilter.c.
Referenced by avfilter_graph_send_command(), and avfilter_start_frame().
| AVFilterBufferRef* avfilter_ref_buffer | ( | AVFilterBufferRef * | ref, | |
| int | pmask | |||
| ) |
Add a new reference to a buffer.
| ref | an existing reference to the buffer | |
| pmask | a bitmask containing the allowable permissions in the new reference |
Definition at line 39 of file buffer.c.
Referenced by color_request_frame(), default_start_frame(), end_frame(), ff_default_filter_samples(), ff_null_start_frame_keep_ref(), filter_samples(), request_frame(), source_request_frame(), start_frame(), and vf_next_put_image().
| int avfilter_register | ( | AVFilter * | filter | ) |
Register a filter.
This is only needed if you plan to use avfilter_get_by_name later to lookup the AVFilter structure by name. A filter can still by instantiated with avfilter_open even if it is not registered.
| filter | the filter to register |
Definition at line 336 of file avfilter.c.
Referenced by avfilter_register_all().
| void avfilter_register_all | ( | void | ) |
Initialize the filter system.
Register all builtin filters.
Definition at line 29 of file allfilters.c.
Referenced by lavfi_read_header(), and main().
| int avfilter_request_frame | ( | AVFilterLink * | link | ) |
Request an input frame from the filter at the other end of the link.
| link | the input link |
Definition at line 270 of file avfilter.c.
Referenced by av_buffersink_get_buffer_ref(), av_buffersink_read(), avfilter_graph_request_oldest(), avfilter_request_frame(), poll_frame(), request_frame(), request_samples(), and start_frame().
| void avfilter_set_common_channel_layouts | ( | AVFilterContext * | ctx, | |
| AVFilterFormats * | formats | |||
| ) |
Definition at line 66 of file defaults.c.
| void avfilter_set_common_formats | ( | AVFilterContext * | ctx, | |
| AVFilterFormats * | formats | |||
| ) |
Helpers for query_formats() which set all links to the same list of formats/layouts.
If there are no links hooked to this filter, the list of formats is freed.
Helpers for query_formats() which set all links to the same list of formats/layouts.
If there are no links hooked to this filter, the list of formats is freed.
Definition at line 446 of file formats.c.
Referenced by ff_default_query_formats(), and query_formats().
| void avfilter_set_common_packing_formats | ( | AVFilterContext * | ctx, | |
| AVFilterFormats * | formats | |||
| ) |
Definition at line 74 of file defaults.c.
| void avfilter_set_common_pixel_formats | ( | AVFilterContext * | ctx, | |
| AVFilterFormats * | formats | |||
| ) |
| void avfilter_set_common_sample_formats | ( | AVFilterContext * | ctx, | |
| AVFilterFormats * | formats | |||
| ) |
| void avfilter_start_frame | ( | AVFilterLink * | link, | |
| AVFilterBufferRef * | picref | |||
| ) |
Notify the next filter of the start of a frame.
| link | the output link the frame will be sent over | |
| picref | A reference to the frame about to be sent. The data for this frame need only be valid once draw_slice() is called for that portion. The receiving filter will free this reference when it no longer needs it. |
Definition at line 213 of file video.c.
Referenced by color_request_frame(), default_start_frame(), end_frame(), ff_null_start_frame(), ff_null_start_frame_keep_ref(), request_frame(), return_frame(), source_request_frame(), start_frame(), and vf_next_put_image().
| void avfilter_uninit | ( | void | ) |
Uninitialize the filter system.
Unregister all filters.
Definition at line 355 of file avfilter.c.
Referenced by do_exit(), and exit_program().
| void avfilter_unref_buffer | ( | AVFilterBufferRef * | ref | ) |
Remove a reference to a buffer.
If this is the last reference to the buffer, the buffer itself is also automatically freed.
| ref | reference to the buffer, may be NULL |
Definition at line 141 of file buffer.c.
Referenced by alloc_picture(), av_buffersink_read_samples(), av_buffersrc_add_frame(), av_buffersrc_add_ref(), avfilter_end_frame(), avfilter_unref_bufferp(), color_request_frame(), common_uninit(), default_end_frame(), end_frame(), ff_default_filter_samples(), ff_filter_samples(), filter_samples(), flush_fifo(), lavfi_read_packet(), main(), movie_common_uninit(), output_frame(), poll_filters(), queue_picture(), request_frame(), start_frame(), stream_close(), uninit(), vf_next_put_image(), and write_to_fifo().
| void avfilter_unref_bufferp | ( | AVFilterBufferRef ** | ref | ) |
Remove a reference to a buffer and set the pointer to NULL.
If this is the last reference to the buffer, the buffer itself is also automatically freed.
| ref | pointer to the buffer reference |
Definition at line 160 of file buffer.c.
Referenced by end_frame(), and uninit().
| unsigned avfilter_version | ( | void | ) |
| const int64_t avfilter_all_channel_layouts[] |
A list of all channel layouts supported by libavfilter.
Definition at line 285 of file formats.c.
Referenced by init_filters(), and lavfi_read_header().
1.5.8