#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, AVFilterPicRef *picref) |
| Callback called before passing the first slice of a new frame. | |
| AVFilterPicRef *(* | get_video_buffer )(AVFilterLink *link, int perms, int w, int h) |
| Callback function to get a 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. | |
| int(* | poll_frame )(AVFilterLink *link) |
| Frame poll callback. | |
| int(* | request_frame )(AVFilterLink *link) |
| Frame request callback. | |
| int(* | config_props )(AVFilterLink *link) |
| Link configuration callback. | |
Definition at line 270 of file avfilter.h.
| int(* AVFilterPad::config_props)(AVFilterLink *link) |
Link configuration callback.
For output pads, this should set the link properties such as width/height. This should NOT set the format property - that is 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 filters, this should return zero on success, and another value on error.
| 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.
| 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.
| AVFilterPicRef*(* AVFilterPad::get_video_buffer)(AVFilterLink *link, int perms, int w, int h) |
Callback function to get a buffer.
If NULL, the filter system will use avfilter_default_get_video_buffer().
Input video pads only.
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 292 of file avfilter.h.
Referenced by avfilter_start_frame().
| 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 277 of file avfilter.h.
Referenced by avfilter_graph_check_validity(), and pad_count().
| int(* AVFilterPad::poll_frame)(AVFilterLink *link) |
Frame poll callback.
This returns the number of immediately available frames. 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 video pads only.
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 303 of file avfilter.h.
Referenced by avfilter_start_frame().
| 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.
Output video pads only.
| void(* AVFilterPad::start_frame)(AVFilterLink *link, AVFilterPicRef *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.
Only video supported now, hopefully someone will add audio in the future.
Definition at line 283 of file avfilter.h.
1.5.8