mirror of
https://github.com/asticode/go-astiav.git
synced 2024-05-28 13:53:18 +08:00
212 lines
4.8 KiB
Go
212 lines
4.8 KiB
Go
package astiav
|
|
|
|
//#cgo pkg-config: libswscale
|
|
//#include <libswscale/swscale.h>
|
|
import "C"
|
|
import (
|
|
"errors"
|
|
"unsafe"
|
|
)
|
|
|
|
// https://github.com/FFmpeg/FFmpeg/blob/n5.0/libswscale/swscale_internal.h#L300
|
|
type SoftwareScaleContext struct {
|
|
c *C.struct_SwsContext
|
|
// We need to store attributes in GO since C attributes are internal and therefore not accessible
|
|
dstFormat C.enum_AVPixelFormat
|
|
dstH C.int
|
|
dstW C.int
|
|
flags C.int
|
|
srcFormat C.enum_AVPixelFormat
|
|
srcH C.int
|
|
srcW C.int
|
|
}
|
|
|
|
type softwareScaleContextUpdate struct {
|
|
dstFormat *PixelFormat
|
|
dstH *int
|
|
dstW *int
|
|
flags *SoftwareScaleContextFlags
|
|
srcFormat *PixelFormat
|
|
srcH *int
|
|
srcW *int
|
|
}
|
|
|
|
func CreateSoftwareScaleContext(srcW, srcH int, srcFormat PixelFormat, dstW, dstH int, dstFormat PixelFormat, flags SoftwareScaleContextFlags) (*SoftwareScaleContext, error) {
|
|
ssc := &SoftwareScaleContext{
|
|
dstFormat: C.enum_AVPixelFormat(dstFormat),
|
|
dstH: C.int(dstH),
|
|
dstW: C.int(dstW),
|
|
flags: C.int(flags),
|
|
srcFormat: C.enum_AVPixelFormat(srcFormat),
|
|
srcH: C.int(srcH),
|
|
srcW: C.int(srcW),
|
|
}
|
|
|
|
ssc.c = C.sws_getContext(
|
|
ssc.srcW,
|
|
ssc.srcH,
|
|
ssc.srcFormat,
|
|
ssc.dstW,
|
|
ssc.dstH,
|
|
ssc.dstFormat,
|
|
ssc.flags,
|
|
nil, nil, nil,
|
|
)
|
|
if ssc.c == nil {
|
|
return nil, errors.New("astiav: empty new context")
|
|
}
|
|
|
|
classers.set(ssc)
|
|
return ssc, nil
|
|
}
|
|
|
|
func (ssc *SoftwareScaleContext) Free() {
|
|
classers.del(ssc)
|
|
C.sws_freeContext(ssc.c)
|
|
}
|
|
|
|
var _ Classer = (*SoftwareScaleContext)(nil)
|
|
|
|
func (ssc *SoftwareScaleContext) Class() *Class {
|
|
return newClassFromC(unsafe.Pointer(ssc.c))
|
|
}
|
|
|
|
func (ssc *SoftwareScaleContext) ScaleFrame(src, dst *Frame) error {
|
|
return newError(C.sws_scale_frame(ssc.c, dst.c, src.c))
|
|
}
|
|
|
|
func (ssc *SoftwareScaleContext) update(u softwareScaleContextUpdate) error {
|
|
dstW := ssc.dstW
|
|
if u.dstW != nil {
|
|
dstW = C.int(*u.dstW)
|
|
}
|
|
|
|
dstH := ssc.dstH
|
|
if u.dstH != nil {
|
|
dstH = C.int(*u.dstH)
|
|
}
|
|
|
|
dstFormat := ssc.dstFormat
|
|
if u.dstFormat != nil {
|
|
dstFormat = C.enum_AVPixelFormat(*u.dstFormat)
|
|
}
|
|
|
|
srcW := ssc.srcW
|
|
if u.srcW != nil {
|
|
srcW = C.int(*u.srcW)
|
|
}
|
|
|
|
srcH := ssc.srcH
|
|
if u.srcH != nil {
|
|
srcH = C.int(*u.srcH)
|
|
}
|
|
|
|
srcFormat := ssc.srcFormat
|
|
if u.srcFormat != nil {
|
|
srcFormat = C.enum_AVPixelFormat(*u.srcFormat)
|
|
}
|
|
|
|
flags := ssc.flags
|
|
if u.flags != nil {
|
|
flags = C.int(*u.flags)
|
|
}
|
|
|
|
c := C.sws_getCachedContext(
|
|
ssc.c,
|
|
srcW,
|
|
srcH,
|
|
srcFormat,
|
|
dstW,
|
|
dstH,
|
|
dstFormat,
|
|
flags,
|
|
nil, nil, nil,
|
|
)
|
|
if c == nil {
|
|
return errors.New("astiav: empty new context")
|
|
}
|
|
|
|
ssc.c = c
|
|
ssc.dstW = dstW
|
|
ssc.dstH = dstH
|
|
ssc.dstFormat = dstFormat
|
|
ssc.srcW = srcW
|
|
ssc.srcH = srcH
|
|
ssc.srcFormat = srcFormat
|
|
ssc.flags = flags
|
|
|
|
return nil
|
|
}
|
|
|
|
func (ssc *SoftwareScaleContext) Flags() SoftwareScaleContextFlags {
|
|
return SoftwareScaleContextFlags(ssc.flags)
|
|
}
|
|
|
|
func (ssc *SoftwareScaleContext) SetFlags(swscf SoftwareScaleContextFlags) error {
|
|
return ssc.update(softwareScaleContextUpdate{flags: &swscf})
|
|
}
|
|
|
|
func (ssc *SoftwareScaleContext) DestinationWidth() int {
|
|
return int(ssc.dstW)
|
|
}
|
|
|
|
func (ssc *SoftwareScaleContext) SetDestinationWidth(i int) error {
|
|
return ssc.update(softwareScaleContextUpdate{dstW: &i})
|
|
}
|
|
|
|
func (ssc *SoftwareScaleContext) DestinationHeight() int {
|
|
return int(ssc.dstH)
|
|
}
|
|
|
|
func (ssc *SoftwareScaleContext) SetDestinationHeight(i int) error {
|
|
return ssc.update(softwareScaleContextUpdate{dstH: &i})
|
|
}
|
|
|
|
func (ssc *SoftwareScaleContext) DestinationPixelFormat() PixelFormat {
|
|
return PixelFormat(ssc.dstFormat)
|
|
}
|
|
|
|
func (ssc *SoftwareScaleContext) SetDestinationPixelFormat(p PixelFormat) error {
|
|
return ssc.update(softwareScaleContextUpdate{dstFormat: &p})
|
|
}
|
|
|
|
func (ssc *SoftwareScaleContext) DestinationResolution() (width int, height int) {
|
|
return int(ssc.dstW), int(ssc.dstH)
|
|
}
|
|
|
|
func (ssc *SoftwareScaleContext) SetDestinationResolution(w int, h int) error {
|
|
return ssc.update(softwareScaleContextUpdate{dstW: &w, dstH: &h})
|
|
}
|
|
|
|
func (ssc *SoftwareScaleContext) SourceWidth() int {
|
|
return int(ssc.srcW)
|
|
}
|
|
|
|
func (ssc *SoftwareScaleContext) SetSourceWidth(i int) error {
|
|
return ssc.update(softwareScaleContextUpdate{srcW: &i})
|
|
}
|
|
|
|
func (ssc *SoftwareScaleContext) SourceHeight() int {
|
|
return int(ssc.srcH)
|
|
}
|
|
|
|
func (ssc *SoftwareScaleContext) SetSourceHeight(i int) error {
|
|
return ssc.update(softwareScaleContextUpdate{srcH: &i})
|
|
}
|
|
|
|
func (ssc *SoftwareScaleContext) SourcePixelFormat() PixelFormat {
|
|
return PixelFormat(ssc.srcFormat)
|
|
}
|
|
|
|
func (ssc *SoftwareScaleContext) SetSourcePixelFormat(p PixelFormat) error {
|
|
return ssc.update(softwareScaleContextUpdate{srcFormat: &p})
|
|
}
|
|
|
|
func (ssc *SoftwareScaleContext) SourceResolution() (int, int) {
|
|
return int(ssc.srcW), int(ssc.srcH)
|
|
}
|
|
|
|
func (ssc *SoftwareScaleContext) SetSourceResolution(w int, h int) error {
|
|
return ssc.update(softwareScaleContextUpdate{srcW: &w, srcH: &h})
|
|
}
|