@@ -57,6 +57,16 @@ typedef struct AVFilterGraphDescExport

     struct AVFilterGraphDescExport *next;

 } AVFilterGraphDescExport;

+/** Sections of a filter graph description */

+typedef enum

+{

+    SEC_NONE = 0,

+    SEC_FILTERS,

+    SEC_LINKS,

+    SEC_INPUTS,

+    SEC_OUTPUTS

+} AVFilterGraphDescSection;

+

 /** Description of a graph to be loaded from a file, etc */

 typedef struct

 {

@@ -66,6 +76,30 @@ typedef struct

     AVFilterGraphDescExport *outputs;   ///< outputs to export

 } AVFilterGraphDesc;

+typedef struct

+{

+    AVFilterGraphDescSection section;   ///< current section being parsed

+

+    AVFilterGraphDescFilter **filterp;  ///< last parsed filter

+    AVFilterGraphDescLink   **linkp;    ///< last parsed link

+    AVFilterGraphDescExport **inputp;   ///< last parsed exported input

+    AVFilterGraphDescExport **outputp;  ///< last parsed exported output

+} AVFilterGraphDescParser;

+

+/** Parse a line of a filter graph description.

+ * @param desc   Pointer to an AVFilterGraphDesc pointer. If *desc is NULL,

+ *               a new AVFilterGraphDesc structure will be created for you.

+ *               Must be the same between multiple invocations when parsing

+ *               the same description.

+ * @param parser Parser state. Must be the same between multiple invocations

+ *               when parsing the same description

+ * @param line   Line of the graph description to parse.

+ * @return       Zero on success, negative on error.

+ */

+int avfilter_graph_parse_desc(AVFilterGraphDesc **desc,

+                              AVFilterGraphDescParser **parser,

+                              char *line);

+

 /**

  * Load a filter graph description from a file

  * @param filename Name of the file from which to load the description