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/**
* Go race detector
*
* MIT License
*
* Copyright (c) 2019 struktur AG, Joachim Bauch <bauch@struktur.de>
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*
* Based on an example by "Hans Duedal" (hans.duedal@gmail.com) to reproduce
* https://github.com/strukturag/libheif/issues/147
*
*/
package main
import (
"fmt"
"image"
"io/ioutil"
"os"
"sync"
"github.com/strukturag/libheif/go/heif"
)
func decodeImage(data []byte) (image.Image, int, int, error) {
ctx, err := heif.NewContext()
if err != nil {
return nil, 0, 0, err
}
err = ctx.ReadFromMemory(data)
if err != nil {
return nil, 0, 0, err
}
imgh, err := ctx.GetPrimaryImageHandle()
if err != nil {
return nil, 0, 0, err
}
width := imgh.GetWidth()
height := imgh.GetHeight()
img, err := imgh.DecodeImage(heif.ColorspaceUndefined, heif.ChromaUndefined, nil)
if err != nil {
return nil, 0, 0, err
}
img, err = img.ScaleImage(width/2, height/2)
if err != nil {
return nil, 0, 0, err
}
goimg, err := img.GetImage()
if err != nil {
return nil, 0, 0, err
}
return goimg, width / 2, height / 2, nil
}
func main() {
if len(os.Args) != 2 {
fmt.Printf("USAGE: %s <filename>\n", os.Args[0])
os.Exit(1)
}
filename := os.Args[1]
imgbytes, err := ioutil.ReadFile(filename)
if err != nil {
panic(err)
}
count := 100
var ready sync.WaitGroup
var done sync.WaitGroup
fmt.Printf("Decoding in %d goroutines ...", count)
ready.Add(count)
done.Add(count)
for i := 0; i < count; i++ {
go func() {
defer done.Done()
ready.Done()
ready.Wait()
_, _, _, err := decodeImage(imgbytes)
if err != nil {
panic(err)
}
}()
}
done.Wait()
fmt.Println("ok")
}
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