2023-10-22 11:46:19 CST W43D0

avutil_file.go

@@ -0,0 +1,34 @@
+package ffmpeg
+
+/*
+#include <libavutil/file.h>
+*/
+import "C"
+import "unsafe"
+
+// AvFileMap reads the file with name filename, and put its content in a newly
+// allocated buffer or map it with mmap() when available.
+func AvFileMap(filename string, bufptr **uint8, size *uintptr, logOffset int32, logCtx CVoidPointer) int32 {
+	filenamePtr, filenameFunc := StringCasting(filename)
+	defer filenameFunc()
+	return (int32)(C.av_file_map((*C.char)(filenamePtr), (**C.uint8_t)(unsafe.Pointer(bufptr)),
+		(*C.size_t)(unsafe.Pointer(size)), (C.int)(logOffset), VoidPointer(logCtx)))
+}
+
+// AvFileUnmap unmaps or frees the buffer bufptr created by AvFileMap().
+func AvFileUnmap(bufptr *uint8, size uintptr) {
+	C.av_file_unmap((*C.uint8_t)(bufptr), (C.size_t)(size))
+}
+
+// AvTempfile tries to create file in /tmp first, if possible.
+func AvTempfile(prefix string, logOffset int32, logCtx CVoidPointer) (filename string, ret int32) {
+	prefixPtr, prefixFunc := StringCasting(prefix)
+	defer prefixFunc()
+	var filenamePtr *C.char
+	defer C.free(unsafe.Pointer(filenamePtr))
+	ret = (int32)(C.av_tempfile((*C.char)(prefixPtr),
+		(**C.char)(unsafe.Pointer(&filenamePtr)),
+		(C.int)(logOffset),
+		VoidPointer(logCtx)))
+	return C.GoString(filenamePtr), ret
+}