#include "avfilter.h"
#include "libavutil/log.h"
-typedef struct AVFilterGraph {
-#if FF_API_GRAPH_AVCLASS
- const AVClass *av_class;
-#endif
- unsigned filter_count;
- AVFilterContext **filters;
-
- char *scale_sws_opts; ///< sws options to use for the auto-inserted scale filters
-} AVFilterGraph;
-
-/**
- * Allocate a filter graph.
- */
-AVFilterGraph *avfilter_graph_alloc(void);
-
-/**
- * Get a filter instance with name name from graph.
- *
- * @return the pointer to the found filter instance or NULL if it
- * cannot be found.
- */
-AVFilterContext *avfilter_graph_get_filter(AVFilterGraph *graph, char *name);
-
-/**
- * Add an existing filter instance to a filter graph.
- *
- * @param graphctx the filter graph
- * @param filter the filter to be added
- */
-int avfilter_graph_add_filter(AVFilterGraph *graphctx, AVFilterContext *filter);
-
-/**
- * Create and add a filter instance into an existing graph.
- * The filter instance is created from the filter filt and inited
- * with the parameters args and opaque.
- *
- * In case of success put in *filt_ctx the pointer to the created
- * filter instance, otherwise set *filt_ctx to NULL.
- *
- * @param name the instance name to give to the created filter instance
- * @param graph_ctx the filter graph
- * @return a negative AVERROR error code in case of failure, a non
- * negative value otherwise
- */
-int avfilter_graph_create_filter(AVFilterContext **filt_ctx, AVFilter *filt,
- const char *name, const char *args, void *opaque,
- AVFilterGraph *graph_ctx);
-
-/**
- * Check validity and configure all the links and formats in the graph.
- *
- * @param graphctx the filter graph
- * @param log_ctx context used for logging
- * @return 0 in case of success, a negative AVERROR code otherwise
- */
-int avfilter_graph_config(AVFilterGraph *graphctx, void *log_ctx);
-
-/**
- * Free a graph, destroy its links, and set *graph to NULL.
- * If *graph is NULL, do nothing.
- */
-void avfilter_graph_free(AVFilterGraph **graph);
-
-/**
- * A linked-list of the inputs/outputs of the filter chain.
- *
- * This is mainly useful for avfilter_graph_parse() / avfilter_graph_parse2(),
- * where it is used to communicate open (unlinked) inputs and outputs from and
- * to the caller.
- * This struct specifies, per each not connected pad contained in the graph, the
- * filter context and the pad index required for establishing a link.
- */
-typedef struct AVFilterInOut {
- /** unique name for this input/output in the list */
- char *name;
-
- /** filter context associated to this input/output */
- AVFilterContext *filter_ctx;
-
- /** index of the filt_ctx pad to use for linking */
- int pad_idx;
-
- /** next input/input in the list, NULL if this is the last */
- struct AVFilterInOut *next;
-} AVFilterInOut;
-
-/**
- * Add a graph described by a string to a graph.
- *
- * @param graph the filter graph where to link the parsed graph context
- * @param filters string to be parsed
- * @param inputs linked list to the inputs of the graph
- * @param outputs linked list to the outputs of the graph
- * @return zero on success, a negative AVERROR code on error
- */
-int avfilter_graph_parse(AVFilterGraph *graph, const char *filters,
- AVFilterInOut *inputs, AVFilterInOut *outputs,
- void *log_ctx);
-
-/**
- * Add a graph described by a string to a graph.
- *
- * @param[in] graph the filter graph where to link the parsed graph context
- * @param[in] filters string to be parsed
- * @param[out] inputs a linked list of all free (unlinked) inputs of the
- * parsed graph will be returned here. It is to be freed
- * by the caller using avfilter_inout_free().
- * @param[out] outputs a linked list of all free (unlinked) outputs of the
- * parsed graph will be returned here. It is to be freed by the
- * caller using avfilter_inout_free().
- * @return zero on success, a negative AVERROR code on error
- *
- * @note the difference between avfilter_graph_parse2() and
- * avfilter_graph_parse() is that in avfilter_graph_parse(), the caller provides
- * the lists of inputs and outputs, which therefore must be known before calling
- * the function. On the other hand, avfilter_graph_parse2() \em returns the
- * inputs and outputs that are left unlinked after parsing the graph and the
- * caller then deals with them. Another difference is that in
- * avfilter_graph_parse(), the inputs parameter describes inputs of the
- * <em>already existing</em> part of the graph; i.e. from the point of view of
- * the newly created part, they are outputs. Similarly the outputs parameter
- * describes outputs of the already existing filters, which are provided as
- * inputs to the parsed filters.
- * avfilter_graph_parse2() takes the opposite approach -- it makes no reference
- * whatsoever to already existing parts of the graph and the inputs parameter
- * will on return contain inputs of the newly parsed part of the graph.
- * Analogously the outputs parameter will contain outputs of the newly created
- * filters.
- */
-int avfilter_graph_parse2(AVFilterGraph *graph, const char *filters,
- AVFilterInOut **inputs,
- AVFilterInOut **outputs);
#endif /* AVFILTER_AVFILTERGRAPH_H */
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