1 files changed, 43 insertions, 0 deletions
diff --git a/libavfilter/avfiltergraph.c b/libavfilter/avfiltergraph.c
index 62da23f7ca..7acafe7b57 100644
--- a/libavfilter/avfiltergraph.c
+++ b/libavfilter/avfiltergraph.c
@@ -26,6 +26,49 @@
 #include "avfilter.h"
 #include "avfiltergraph.h"
 
+
+/** Linked-list of filters to create for an AVFilterGraphDesc */
+typedef struct AVFilterGraphDescFilter
+{
+    int index;              ///< filter instance index
+    char *filter;           ///< name of filter type
+    char *args;             ///< filter parameters
+    struct AVFilterGraphDescFilter *next;
+} AVFilterGraphDescFilter;
+
+/** Linked-list of links between filters */
+typedef struct AVFilterGraphDescLink
+{
+    /* TODO: allow referencing pads by name, not just by index */
+    int src;                ///< index of the source filter
+    unsigned srcpad;        ///< index of the output pad on the source filter
+
+    int dst;                ///< index of the dest filter
+    unsigned dstpad;        ///< index of the input pad on the dest filter
+
+    struct AVFilterGraphDescLink *next;
+} AVFilterGraphDescLink;
+
+/** Linked-list of filter pads to be exported from the graph */
+typedef struct AVFilterGraphDescExport
+{
+    /* TODO: allow referencing pads by name, not just by index */
+    char *name;             ///< name of the exported pad
+    int filter;             ///< index of the filter
+    unsigned pad;           ///< index of the pad to be exported
+
+    struct AVFilterGraphDescExport *next;
+} AVFilterGraphDescExport;
+
+/** Description of a graph to be loaded from a file, etc */
+typedef struct
+{
+    AVFilterGraphDescFilter *filters;   ///< filters in the graph
+    AVFilterGraphDescLink   *links;     ///< links between the filters
+    AVFilterGraphDescExport *inputs;    ///< inputs to export
+    AVFilterGraphDescExport *outputs;   ///< outputs to export
+} AVFilterGraphDesc;
+
 /**
  * For use in av_log
  */