#include <avfilter.h>
Data Fields | |
| const char * | name |
| Pad name. | |
| enum AVMediaType | type |
| AVFilterPad type. | |
| int | min_perms |
| Minimum required permissions on incoming buffers. | |
| int | rej_perms |
| Permissions which are not accepted on incoming buffers. | |
| void(* | start_frame )(AVFilterLink *link, AVFilterBufferRef *picref) |
| Callback called before passing the first slice of a new frame. | |
| AVFilterBufferRef *(* | get_video_buffer )(AVFilterLink *link, int perms, int w, int h) |
| Callback function to get a video buffer. | |
| AVFilterBufferRef *(* | get_audio_buffer )(AVFilterLink *link, int perms, int nb_samples) |
| Callback function to get an audio buffer. | |
| void(* | end_frame )(AVFilterLink *link) |
| Callback called after the slices of a frame are completely sent. | |
| void(* | draw_slice )(AVFilterLink *link, int y, int height, int slice_dir) |
| Slice drawing callback. | |
| void(* | filter_samples )(AVFilterLink *link, AVFilterBufferRef *samplesref) |
| Samples filtering callback. | |
| int(* | poll_frame )(AVFilterLink *link) |
| Frame poll callback. | |
| int(* | request_frame )(AVFilterLink *link) |
| Frame request callback. | |
| int(* | config_props )(AVFilterLink *link) |
| Link configuration callback. | |
See doc/filter_design.txt for details on how to implement the methods.
Definition at line 377 of file avfilter.h.
| int(* AVFilterPad::config_props)(AVFilterLink *link) |
Link configuration callback.
For output pads, this should set the following link properties: video: width, height, sample_aspect_ratio, time_base audio: sample_rate.
This should NOT set properties such as format, channel_layout, etc which are negotiated between filters by the filter system using the query_formats() callback before this function is called.
For input pads, this should check the properties of the link, and update the filter's internal state as necessary.
For both input and output pads, this should return zero on success, and another value on error.
Referenced by avfilter_config_links().
| void(* AVFilterPad::draw_slice)(AVFilterLink *link, int y, int height, int slice_dir) |
Slice drawing callback.
This is where a filter receives video data and should do its processing.
Input video pads only.
Referenced by avfilter_draw_slice().
| void(* AVFilterPad::end_frame)(AVFilterLink *link) |
Callback called after the slices of a frame are completely sent.
If NULL, the filter layer will default to releasing the reference stored in the link structure during start_frame().
Input video pads only.
Referenced by avfilter_end_frame().
| void(* AVFilterPad::filter_samples)(AVFilterLink *link, AVFilterBufferRef *samplesref) |
Samples filtering callback.
This is where a filter receives audio data and should do its processing.
Input audio pads only.
Referenced by ff_filter_samples(), and init().
| AVFilterBufferRef*(* AVFilterPad::get_audio_buffer)(AVFilterLink *link, int perms, int nb_samples) |
Callback function to get an audio buffer.
If NULL, the filter system will use avfilter_default_get_audio_buffer().
Input audio pads only.
Referenced by ff_get_audio_buffer().
| AVFilterBufferRef*(* AVFilterPad::get_video_buffer)(AVFilterLink *link, int perms, int w, int h) |
Callback function to get a video buffer.
If NULL, the filter system will use avfilter_default_get_video_buffer().
Input video pads only.
Referenced by avfilter_get_video_buffer().
Minimum required permissions on incoming buffers.
Any buffer with insufficient permissions will be automatically copied by the filter system to a new buffer which provides the needed access permissions.
Input pads only.
Definition at line 397 of file avfilter.h.
Referenced by avfilter_start_frame(), and ff_filter_samples().
| const char* AVFilterPad::name |
Pad name.
The name is unique among inputs and among outputs, but an input may have the same name as an output. This may be NULL if this pad has no need to ever be referenced by name.
Definition at line 383 of file avfilter.h.
Referenced by avfilter_graph_dump_to_buf(), ff_avfilter_graph_check_validity(), init(), opt_filters(), pad_count(), split_init(), split_uninit(), transcode_init(), and uninit().
| int(* AVFilterPad::poll_frame)(AVFilterLink *link) |
Frame poll callback.
This returns the number of immediately available samples. It should return a positive value if the next request_frame() is guaranteed to return one frame (with no delay).
Defaults to just calling the source poll_frame() method.
Output pads only.
Referenced by avfilter_poll_frame().
Permissions which are not accepted on incoming buffers.
Any buffer which has any of these permissions set will be automatically copied by the filter system to a new buffer which does not have those permissions. This can be used to easily disallow buffers with AV_PERM_REUSE.
Input pads only.
Definition at line 408 of file avfilter.h.
Referenced by avfilter_start_frame(), and ff_filter_samples().
| int(* AVFilterPad::request_frame)(AVFilterLink *link) |
Frame request callback.
A call to this should result in at least one frame being output over the given link. This should return zero on success, and another value on error. See avfilter_request_frame() for the error codes with a specific meaning.
Output pads only.
Referenced by avfilter_request_frame().
| void(* AVFilterPad::start_frame)(AVFilterLink *link, AVFilterBufferRef *picref) |
Callback called before passing the first slice of a new frame.
If NULL, the filter layer will default to storing a reference to the picture inside the link structure.
Input video pads only.
Referenced by avfilter_start_frame().
AVFilterPad type.
Definition at line 388 of file avfilter.h.
Referenced by avfilter_link(), configure_output_filter(), init(), init_input_filter(), init_output_filter(), main(), opt_output_file(), and split_init().
1.5.8