[FFmpeg-soc] [soc]: r620 - in libavfilter: avfilter.c avfilter.h

[koorogi]

Author: koorogi
Date: Wed Aug  8 00:31:56 2007
New Revision: 620

Log:
Helper functions for adding new pads to filters at runtime


Modified:
   libavfilter/avfilter.c
   libavfilter/avfilter.h

Modified: libavfilter/avfilter.c
==============================================================================
--- libavfilter/avfilter.c	(original)
+++ libavfilter/avfilter.c	Wed Aug  8 00:31:56 2007
@@ -47,6 +47,27 @@ void avfilter_unref_pic(AVFilterPicRef *
     av_free(ref);
 }
 
+void avfilter_insert_pad(unsigned idx, unsigned *count, size_t padidx_off,
+                         AVFilterPad **pads, AVFilterLink ***links,
+                         AVFilterPad *newpad)
+{
+    unsigned i;
+
+    idx = FFMIN(idx, *count);
+
+    *pads  = av_realloc(*pads,  sizeof(AVFilterPad)   * (*count + 1));
+    *links = av_realloc(*links, sizeof(AVFilterLink*) * (*count + 1));
+    memmove(*pads +idx+1, *pads +idx, sizeof(AVFilterPad)   * (*count-idx));
+    memmove(*links+idx+1, *links+idx, sizeof(AVFilterLink*) * (*count-idx));
+    memcpy(*pads+idx, newpad, sizeof(AVFilterPad));
+    (*links)[idx] = NULL;
+
+    (*count) ++;
+    for(i = idx+1; i < *count; i ++)
+        if(*links[i])
+            (*(unsigned *)((uint8_t *)(*links[i]) + padidx_off)) ++;
+}
+
 int avfilter_link(AVFilterContext *src, unsigned srcpad,
                   AVFilterContext *dst, unsigned dstpad)
 {

Modified: libavfilter/avfilter.h
==============================================================================
--- libavfilter/avfilter.h	(original)
+++ libavfilter/avfilter.h	Wed Aug  8 00:31:56 2007
@@ -22,6 +22,7 @@
 #ifndef FFMPEG_AVFILTER_H
 #define FFMPEG_AVFILTER_H
 
+#include <stddef.h>
 #include "avcodec.h"
 
 typedef struct AVFilterContext AVFilterContext;
@@ -240,4 +241,36 @@ void avfilter_destroy(AVFilterContext *f
 
 int *avfilter_make_format_list(int len, ...);
 
+/**
+ * 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 avfilter_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 avfilter_insert_inpad(AVFilterContext *f, unsigned index,
+                                         AVFilterPad *p)
+{
+    avfilter_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 avfilter_insert_outpad(AVFilterContext *f, unsigned index,
+                                          AVFilterPad *p)
+{
+    avfilter_insert_pad(index, &f->output_count, offsetof(AVFilterLink, srcpad),
+                        &f->output_pads, &f->outputs, p);
+}
+
 #endif  /* FFMPEG_AVFILTER_H */