ml
66 lines
1.4 KiB
Go
66 lines
1.4 KiB
Go
package movies
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import (
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"context"
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"github.com/inkyblackness/hacked/ss1/content/movie"
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)
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type compressionTask struct {
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width int
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height int
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input movie.Scene
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ctx context.Context
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ctxCancel context.CancelFunc
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resultChan chan compressionResult
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}
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type compressionResult interface{}
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type compressionAborted struct{}
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type compressionFailed struct{ err error }
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type compressionFinished struct{ scene movie.HighResScene }
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func newCompressionTask(scene movie.Scene, width, height int) *compressionTask {
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task := &compressionTask{
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width: width,
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height: height,
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input: scene,
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resultChan: make(chan compressionResult),
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}
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task.ctx, task.ctxCancel = context.WithCancel(context.Background())
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return task
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}
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func (task *compressionTask) run() {
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defer close(task.resultChan)
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highResScene, err := movie.HighResSceneFrom(task.ctx, task.input, task.width, task.height)
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switch {
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case task.ctx.Err() != nil:
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task.resultChan <- compressionAborted{}
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case err != nil:
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task.resultChan <- compressionFailed{err: err}
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default:
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task.resultChan <- compressionFinished{scene: highResScene}
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}
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}
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func (task *compressionTask) update() compressionResult {
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select {
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case result, ok := <-task.resultChan:
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if ok {
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return result
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}
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return compressionAborted{}
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default:
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return nil
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}
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}
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func (task *compressionTask) cancel() {
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task.ctxCancel()
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}
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