2023-10-24 21:24:55 CST W43D2

avutil_crc.go

@@ -0,0 +1,41 @@
+package ffmpeg
+
+/*
+#include <libavutil/crc.h>
+*/
+import "C"
+
+// AVCRC
+type AVCRC C.AVCRC
+
+// AVCRCId
+type AVCRCId = C.AVCRCId
+
+const (
+	AV_CRC_8_ATM      = AVCRCId(C.AV_CRC_8_ATM)
+	AV_CRC_16_ANSI    = AVCRCId(C.AV_CRC_16_ANSI)
+	AV_CRC_16_CCITT   = AVCRCId(C.AV_CRC_16_CCITT)
+	AV_CRC_32_IEEE    = AVCRCId(C.AV_CRC_32_IEEE)
+	AV_CRC_32_IEEE_LE = AVCRCId(C.AV_CRC_32_IEEE_LE)
+	AV_CRC_16_ANSI_LE = AVCRCId(C.AV_CRC_16_ANSI_LE)
+	AV_CRC_24_IEEE    = AVCRCId(C.AV_CRC_24_IEEE)
+	AV_CRC_8_EBU      = AVCRCId(C.AV_CRC_8_EBU)
+	AV_CRC_MAX        = AVCRCId(C.AV_CRC_MAX)
+)
+
+// AvCrcInit initializes a CRC table.
+func AvCrcInit(ctx *AVCRC, le, bits int32, poly uint32, ctxSize int32) int32 {
+	return (int32)(C.av_crc_init((*C.AVCRC)(ctx),
+		(C.int)(le), (C.int)(bits), (C.uint32_t)(poly), (C.int)(ctxSize)))
+}
+
+// AvCrcGetTable gets an initialized standard CRC table.
+func AvCrcGetTable(crcId AVCRCId) *AVCRC {
+	return (*AVCRC)(C.av_crc_get_table((C.AVCRCId)(crcId)))
+}
+
+// AvCrc calculates the CRC of a block.
+func AvCrc(ctx *AVCRC, crc uint32, buffer *uint8, length uintptr) int32 {
+	return (int32)(C.av_crc((*C.AVCRC)(ctx),
+		(C.uint32_t)(crc), (*C.uint8_t)(buffer), (C.size_t)(length)))
+}