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Rework filter initialization sequence. Now supports passing user parameters,

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querying supported colorspaces, etc.

Commited in SoC by Bobby Bingham on 2007-07-05 20:48:48

Originally committed as revision 12080 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Vitor Sessak 2008-02-15 22:12:41 +00:00
parent 4d96a914f9
commit d3e57c15cf
1 changed files with 17 additions and 4 deletions
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21
libavfilter/avfilter.h
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@ -98,6 +98,13 @@ struct AVFilterPad
int type;
#define AV_PAD_VIDEO 0
/**
* Callback to get a list of supported formats. The returned list should
* be terminated by -1. This is used for both input and output pads and
* is required for both.
*/
int *(*query_formats)(AVFilterLink *link);
/**
* Callback called before passing the first slice of a new frame. If
* NULL, the filter layer will default to storing a reference to the
@ -131,11 +138,15 @@ struct AVFilterPad
void (*request_frame)(AVFilterLink *link);
/**
* Callback to set properties of the link. Only for video output pads.
* XXX: this is not acceptable as is. it needs reworked to allow for
* negotiation of colorspace, etc.
* Link configuration callback. For output pads, this should set the link
* properties such as width/height. NOTE: this should not set the format
* property - that is negotiated between filters by the filter system using
* the query_formats() callback.
*
* For input pads, this should check the properties of the link, and update
* the filter's internal state as necessary.
*/
int (*set_video_props)(AVFilterLink *link);
int (*config_props)(AVFilterLink *link);
};
/* the default implementations of start_frame() and end_frame() */
@ -206,4 +217,6 @@ AVFilterContext *avfilter_create_by_name(char *name);
int avfilter_init_filter(AVFilterContext *filter, const char *args);
void avfilter_destroy(AVFilterContext *filter);
int *avfilter_make_format_list(int len, ...);
#endif /* FFMPEG_AVFILTER_H */