hw: add draft rockchip-mpp hw video encoding

external/mpp/mpp.go

@@ -0,0 +1,82 @@
+package mpp
+
+/*
+#cgo CFLAGS: -I/usr/include/rockchip/mpp
+#cgo LDFLAGS: -L/usr/lib -lv4l2 -lrockchip_mpp
+#include "mpp.h"
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <sys/ioctl.h>
+#include <sys/mman.h>
+#include <linux/videodev2.h>
+#include <rockchip/mpp_buffer.h>
+#include <rockchip/mpp_err.h>
+#include <rockchip/mpp_frame.h>
+#include <rockchip/mpp_packet.h>
+#include <rockchip/rk_mpi.h>
+*/
+import "C"
+import (
+	"errors"
+	"fmt"
+	"unsafe"
+)
+
+var mpp *MPP
+
+type MPP struct {
+}
+
+func New(device string, fps int, bitrate int) (*MPP, error) {
+	cDevice := C.CString(device)
+	defer C.free(unsafe.Pointer(cDevice))
+
+	if C.video_init(cDevice) != 0 {
+		return nil, errors.New("failed to initialize video capture")
+	}
+	if C.mpp_init_wrapper(C.int(fps), C.int(bitrate)) != 0 {
+		return nil, errors.New("failed to initialize MPP")
+	}
+	return &MPP{}, nil
+}
+
+func GetSPS() ([]byte, error) {
+	output := make([]byte, 64) // Allocate buffer for SPS
+	var outputLen C.int
+
+	ret := C.get_sps((*C.uchar)(unsafe.Pointer(&output[0])), &outputLen)
+	if ret != 0 {
+		return nil, fmt.Errorf("failed to retrieve SPS: %v", ret)
+	}
+
+	return output[:outputLen], nil
+}
+
+func (m *MPP) CaptureAndEncode() ([]byte, error) {
+	output := make([]byte, 1024*1024) // 1MB buffer
+	var outputLen C.int
+
+	ret := C.capture_and_encode((*C.uchar)(unsafe.Pointer(&output[0])), &outputLen)
+	if ret != 0 {
+		return nil, errors.New("failed to capture and encode frame")
+	}
+
+	return output[:outputLen], nil
+}
+
+func (m *MPP) Close() {
+	C.cleanup()
+}
+
+func NewTest(device string) error {
+	var err error
+	mpp, err = New(device, 60, 10000*1000)
+	return err
+}
+
+func GetInstance() *MPP {
+	return mpp
+}