Added filter ParseSegment()

filter_graph_segment.go

@@ -0,0 +1,36 @@
+package astiav
+
+//#include <libavfilter/avfilter.h>
+import "C"
+import (
+	"math"
+	"unsafe"
+)
+
+// https://github.com/FFmpeg/FFmpeg/blob/n7.0/libavfilter/avfilter.h#L1156
+type FilterGraphSegment struct {
+	c *C.AVFilterGraphSegment
+}
+
+func newFilterGraphSegmentFromC(c *C.AVFilterGraphSegment) *FilterGraphSegment {
+	if c == nil {
+		return nil
+	}
+	return &FilterGraphSegment{c: c}
+}
+
+func (fgs *FilterGraphSegment) Free() {
+	C.avfilter_graph_segment_free(&fgs.c)
+}
+
+func (fgs *FilterGraphSegment) Chains() (cs []*FilterChain) {
+	ccs := (*[(math.MaxInt32 - 1) / unsafe.Sizeof((*C.AVFilterChain)(nil))](*C.AVFilterChain))(unsafe.Pointer(fgs.c.chains))
+	for i := 0; i < fgs.NbChains(); i++ {
+		cs = append(cs, newFilterChainFromC(ccs[i]))
+	}
+	return
+}
+
+func (fgs *FilterGraphSegment) NbChains() int {
+	return int(fgs.c.nb_chains)
+}