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Rework link property configuration system.

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This can now handle filters which are added to graphs out of order,
including auto-inserted scale filters.  As an added bonus, it can
now detect circular filter chains which wouldn't work anyway.

Commited in SoC by Bobby Bingham on 2007-12-24 03:22:10

Originally committed as revision 12107 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Vitor Sessak 2008-02-15 22:14:25 +00:00
parent 3afcca9dfd
commit 24c4eff657
1 changed files with 10 additions and 3 deletions
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13
libavfilter/avfilter.h
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@ -381,6 +381,13 @@ struct AVFilterLink
AVFilterContext *dst; ///< dest filter AVFilterContext *dst; ///< dest filter
unsigned int dstpad; ///< index of the input pad on the dest filter unsigned int dstpad; ///< index of the input pad on the dest filter
/** stage of the initialization of the link properties (dimensions, etc) */
enum {
AVLINK_UNINIT = 0, ///< not started
AVLINK_STARTINIT, ///< started, but incomplete
AVLINK_INIT ///< complete
} init_state;
int w; ///< agreed upon image width int w; ///< agreed upon image width
int h; ///< agreed upon image height int h; ///< agreed upon image height
enum PixelFormat format; ///< agreed upon image colorspace enum PixelFormat format; ///< agreed upon image colorspace
@ -418,11 +425,11 @@ int avfilter_link(AVFilterContext *src, unsigned srcpad,
AVFilterContext *dst, unsigned dstpad); AVFilterContext *dst, unsigned dstpad);
/** /**
* Negotiate the colorspace, dimensions, etc of a link * Negotiate the colorspace, dimensions, etc of all inputs to a filter.
* @param link The link to negotiate the properties of * @param filter The filter to negotiate the properties for its inputs
* @return Zero on successful negotiation * @return Zero on successful negotiation
*/ */
int avfilter_config_link(AVFilterLink *link); int avfilter_config_links(AVFilterContext *filter);
/** /**
* Request a picture buffer with a specific set of permissions * Request a picture buffer with a specific set of permissions