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Limit max number of threads as per libaom req 

Fix #7
This commit is contained in:
Kagami Hiiragi 2019-08-29 10:42:14 +03:00
parent 6487e4d17d
commit e54663f722
1 changed files with 11 additions and 6 deletions
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17
avif.go
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@ -17,17 +17,19 @@ import (
// Encoder constants.
const (
MinThreads = 1
MaxThreads = 64
MinSpeed = 0
MaxSpeed = 8
MinQuality = 0
MaxQuality = 63
)
// Options are the encoding parameters. Threads ranges from 1, 0 means
// use all available cores. Speed ranges from MinSpeed to MaxSpeed.
// Quality ranges from MinQuality to MaxQuality, lower is better, 0
// means lossless encoding. SubsampleRatio specifies subsampling of the
// encoded image, nil means 4:2:0.
// Options are the encoding parameters. Threads ranges from MinThreads
// to MaxThreads, 0 means use all available cores. Speed ranges from
// MinSpeed to MaxSpeed. Quality ranges from MinQuality to MaxQuality,
// lower is better, 0 means lossless encoding. SubsampleRatio specifies
// subsampling of the encoded image, nil means 4:2:0.
type Options struct {
Threads int
Speed int
@ -113,6 +115,9 @@ func Encode(w io.Writer, m image.Image, o *Options) error {
}
if o.Threads == 0 {
o.Threads = runtime.NumCPU()
if o.Threads > MaxThreads {
o.Threads = MaxThreads
}
}
if o.SubsampleRatio == nil {
s := image.YCbCrSubsampleRatio420
@ -121,7 +126,7 @@ func Encode(w io.Writer, m image.Image, o *Options) error {
// o.SubsampleRatio = &yuvImg.SubsampleRatio
// }
}
if o.Threads < 1 {
if o.Threads < MinThreads || o.Threads > MaxThreads {
return OptionsError("bad threads number")
}
if o.Speed < MinSpeed || o.Speed > MaxSpeed {