Added software resample context

software_resample_context.go

@@ -0,0 +1,58 @@
+package astiav
+
+//#include <libswresample/swresample.h>
+import "C"
+import "unsafe"
+
+// https://ffmpeg.org/doxygen/7.0/structSwrContext.html
+type SoftwareResampleContext struct {
+	c *C.SwrContext
+}
+
+func newSoftwareResampleContextFromC(c *C.SwrContext) *SoftwareResampleContext {
+	if c == nil {
+		return nil
+	}
+	src := &SoftwareResampleContext{c: c}
+	classers.set(src)
+	return src
+}
+
+// https://ffmpeg.org/doxygen/7.0/group__lswr.html#gaf58c4ff10f73d74bdab8e5aa7193147c
+func AllocSoftwareResampleContext() *SoftwareResampleContext {
+	return newSoftwareResampleContextFromC(C.swr_alloc())
+}
+
+// https://ffmpeg.org/doxygen/7.0/group__lswr.html#ga818f7d78b1ad7d8d5b70de374b668c34
+func (src *SoftwareResampleContext) Free() {
+	// Make sure to clone the classer before freeing the object since
+	// the C free method may reset the pointer
+	c := newClonedClasser(src)
+	C.swr_free(&src.c)
+	// Make sure to remove from classers after freeing the object since
+	// the C free method may use methods needing the classer
+	if c != nil {
+		classers.del(c)
+	}
+}
+
+var _ Classer = (*SoftwareResampleContext)(nil)
+
+// https://ffmpeg.org/doxygen/7.0/structSwrContext.html#a7e13adcdcbc11bcc933cb7d0b9f839a0
+func (src *SoftwareResampleContext) Class() *Class {
+	return newClassFromC(unsafe.Pointer(src.c))
+}
+
+// https://ffmpeg.org/doxygen/7.0/group__lswr.html#gac482028c01d95580106183aa84b0930c
+func (src_ *SoftwareResampleContext) ConvertFrame(src, dst *Frame) error {
+	var csrc *C.AVFrame
+	if src != nil {
+		csrc = src.c
+	}
+	return newError(C.swr_convert_frame(src_.c, dst.c, csrc))
+}
+
+// https://ffmpeg.org/doxygen/7.0/group__lswr.html#ga5121a5a7890a2d23b72dc871dd0ebb06
+func (src_ *SoftwareResampleContext) Delay(base int64) int64 {
+	return int64(C.swr_get_delay(src_.c, C.int64_t(base)))
+}