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| package goffmpeg
|
| /*
| #include <stdlib.h>
| #include "libcffmpeg.h"
| */
| import "C"
| import "unsafe"
|
| const (
| // ScaleNone self add no scale raw frame data
| ScaleNone = 0
| // ScaleFastBilinear SWS_FAST_BILINEAR
| ScaleFastBilinear = 1
| // ScaleBilinear SWS_BILINEAR
| ScaleBilinear = 2
| // ScaleBicubic SWS_BICUBIC
| ScaleBicubic = 4
| // ScaleX SWS_X
| ScaleX = 8
| // ScalePoint SWS_POINT
| ScalePoint = 0x10
| // ScaleArea SWS_AREA
| ScaleArea = 0x20
| // ScaleBicublin SWS_BICUBLIN
| ScaleBicublin = 0x40
| // ScaleGauss SWS_GAUSS
| ScaleGauss = 0x80
| // ScaleSinc SWS_SINC
| ScaleSinc = 0x100
| // ScaleLancZos SWS_LANCZOS
| ScaleLancZos = 0x200
| // ScaleSpline SWS_SPLINE
| ScaleSpline = 0x400
| )
|
| // SrcFormat format NV
| const SrcFormat = 23
|
| // DstFormat format
| const DstFormat = 3
|
| // GoConv conv
| type GoConv struct {
| SrcW int
| SrcH int
| DstW int
| DstH int
|
| size int
| conv C.cconv
| }
|
| // NewConv new conv
| func NewConv(srcW, srcH, dstW, dstH, scaleFlag int) *GoConv {
| c := C.wrap_fn_create_conv(unsafe.Pointer(libcffmpeg), C.int(srcW), C.int(srcH), C.int(SrcFormat),
| C.int(dstW), C.int(dstH), C.int(DstFormat), C.int(scaleFlag))
|
| if c == nil {
| return nil
| }
|
| return &GoConv{
| srcW,
| srcH,
| dstW,
| dstH,
| dstW * dstH * 3,
| c,
| }
| }
|
| // NewResizer resize
| func NewResizer(srcW, srcH, format, dstW, dstH, scaleFlag int) *GoConv {
| c := C.wrap_fn_create_conv(unsafe.Pointer(libcffmpeg), C.int(srcW), C.int(srcH), C.int(format),
| C.int(dstW), C.int(dstH), C.int(format), C.int(scaleFlag))
|
| if c == nil {
| return nil
| }
|
| size := dstW * dstH * 3
| if format == SrcFormat {
| size /= 2
| }
| return &GoConv{
| srcW,
| srcH,
| dstW,
| dstH,
| size,
| c,
| }
| }
|
| // Free free
| func (c *GoConv) Free() {
| if c.conv != nil {
| C.wrap_fn_destroy_conv(unsafe.Pointer(libcffmpeg), c.conv)
| }
| }
|
| // ConvToPicture conv to pic
| func (c *GoConv) ConvToPicture(src []byte) []byte {
| if c.conv == nil {
| return nil
| }
|
| bgr := C.wrap_fn_conv(unsafe.Pointer(libcffmpeg), c.conv, (*C.uchar)(unsafe.Pointer(&src[0])))
| defer C.free(unsafe.Pointer(bgr))
|
| if bgr != nil {
| return C.GoBytes(bgr, C.int(c.size))
| }
|
| return nil
| }
|
| // Resize resize
| func (c *GoConv) Resize(src []byte) []byte {
| if c.SrcW == c.DstW && c.SrcH == c.DstH {
| return src
| }
| return c.ConvToPicture(src)
| }
|
| ///////////////
|
| // ConvToPicture2 second
| func (c *GoConv) ConvToPicture2(src []byte) (unsafe.Pointer, []byte) {
| if c.conv == nil {
| return nil, nil
| }
|
| bgr := C.wrap_fn_conv(unsafe.Pointer(libcffmpeg), c.conv, (*C.uchar)(unsafe.Pointer(&src[0])))
| if bgr != nil {
| const maxLen = 0x7fffffff
| size := int(c.size)
| data := (*[maxLen]byte)(unsafe.Pointer(bgr))[:size:size]
| return bgr, data
| }
| return nil, nil
| }
|
| // Resize2 resize2
| func (c *GoConv) Resize2(src []byte) (unsafe.Pointer, []byte) {
| if c.SrcW == c.DstW && c.SrcH == c.DstH {
| return nil, src
| }
| return c.ConvToPicture2(src)
| }
|
|
