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#ifndef _FILTER_H_
#define _FILTER_H_
#include "chunk.h"
#define FILTER_ID_INPUT -1
/*
* The filter chain will always have an input filter to hold
* the pre-filtered content. All other filters are added after
* the last filter.
*
* Each filter uses the chunkqueue from the previous filter as
* input and outputs to it's own chunkqueue.
*
*/
typedef struct filter {
struct filter *prev;
struct filter *next;
int id; /* use plugin id */
chunkqueue *cq; /* this filters output */
} filter;
typedef struct {
filter *first;
filter *last;
} filter_chain;
LI_API filter_chain * filter_chain_init(void);
LI_API void filter_chain_free(filter_chain *chain);
LI_API void filter_chain_reset(filter_chain *chain);
LI_API filter * filter_chain_create_filter(filter_chain *chain, int id);
LI_API filter * filter_chain_get_filter(filter_chain *chain, int id);
LI_API void filter_chain_remove_filter(filter_chain *chain, filter *fl);
LI_API off_t filter_chain_copy_output(filter_chain *chain, chunkqueue *out);
#endif
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