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Diffstat (limited to 'libavfilter/internal.h')
-rw-r--r--libavfilter/internal.h50
1 files changed, 50 insertions, 0 deletions
diff --git a/libavfilter/internal.h b/libavfilter/internal.h
index 0b294d83aa..c208edf229 100644
--- a/libavfilter/internal.h
+++ b/libavfilter/internal.h
@@ -144,4 +144,54 @@ void ff_dlog_ref(void *ctx, AVFilterBufferRef *ref, int end);
void ff_dlog_link(void *ctx, AVFilterLink *link, int end);
+/**
+ * Insert a new pad.
+ *
+ * @param idx Insertion point. Pad is inserted at the end if this point
+ * is beyond the end of the list of pads.
+ * @param count Pointer to the number of pads in the list
+ * @param padidx_off Offset within an AVFilterLink structure to the element
+ * to increment when inserting a new pad causes link
+ * numbering to change
+ * @param pads Pointer to the pointer to the beginning of the list of pads
+ * @param links Pointer to the pointer to the beginning of the list of links
+ * @param newpad The new pad to add. A copy is made when adding.
+ */
+void ff_insert_pad(unsigned idx, unsigned *count, size_t padidx_off,
+ AVFilterPad **pads, AVFilterLink ***links,
+ AVFilterPad *newpad);
+
+/** Insert a new input pad for the filter. */
+static inline void ff_insert_inpad(AVFilterContext *f, unsigned index,
+ AVFilterPad *p)
+{
+ ff_insert_pad(index, &f->input_count, offsetof(AVFilterLink, dstpad),
+ &f->input_pads, &f->inputs, p);
+}
+
+/** Insert a new output pad for the filter. */
+static inline void ff_insert_outpad(AVFilterContext *f, unsigned index,
+ AVFilterPad *p)
+{
+ ff_insert_pad(index, &f->output_count, offsetof(AVFilterLink, srcpad),
+ &f->output_pads, &f->outputs, p);
+}
+
+/**
+ * Poll a frame from the filter chain.
+ *
+ * @param link the input link
+ * @return the number of immediately available frames, a negative
+ * number in case of error
+ */
+int ff_poll_frame(AVFilterLink *link);
+
+/**
+ * Request an input frame from the filter at the other end of the link.
+ *
+ * @param link the input link
+ * @return zero on success
+ */
+int ff_request_frame(AVFilterLink *link);
+
#endif /* AVFILTER_INTERNAL_H */