forked from mirrors/gotosocial
55 lines
1.4 KiB
Go
55 lines
1.4 KiB
Go
package mp4
|
|
|
|
/*************************** Opus ****************************/
|
|
|
|
// https://opus-codec.org/docs/opus_in_isobmff.html
|
|
|
|
func BoxTypeOpus() BoxType { return StrToBoxType("Opus") }
|
|
|
|
func init() {
|
|
AddAnyTypeBoxDef(&AudioSampleEntry{}, BoxTypeOpus())
|
|
}
|
|
|
|
/*************************** dOps ****************************/
|
|
|
|
// https://opus-codec.org/docs/opus_in_isobmff.html
|
|
|
|
func BoxTypeDOps() BoxType { return StrToBoxType("dOps") }
|
|
|
|
func init() {
|
|
AddBoxDef(&DOps{})
|
|
}
|
|
|
|
type DOps struct {
|
|
Box
|
|
Version uint8 `mp4:"0,size=8"`
|
|
OutputChannelCount uint8 `mp4:"1,size=8"`
|
|
PreSkip uint16 `mp4:"2,size=16"`
|
|
InputSampleRate uint32 `mp4:"3,size=32"`
|
|
OutputGain int16 `mp4:"4,size=16"`
|
|
ChannelMappingFamily uint8 `mp4:"5,size=8"`
|
|
StreamCount uint8 `mp4:"6,opt=dynamic,size=8"`
|
|
CoupledCount uint8 `mp4:"7,opt=dynamic,size=8"`
|
|
ChannelMapping []uint8 `mp4:"8,opt=dynamic,size=8,len=dynamic"`
|
|
}
|
|
|
|
func (DOps) GetType() BoxType {
|
|
return BoxTypeDOps()
|
|
}
|
|
|
|
func (dops DOps) IsOptFieldEnabled(name string, ctx Context) bool {
|
|
switch name {
|
|
case "StreamCount", "CoupledCount", "ChannelMapping":
|
|
return dops.ChannelMappingFamily != 0
|
|
}
|
|
return false
|
|
}
|
|
|
|
func (ops DOps) GetFieldLength(name string, ctx Context) uint {
|
|
switch name {
|
|
case "ChannelMapping":
|
|
return uint(ops.OutputChannelCount)
|
|
}
|
|
return 0
|
|
}
|