mirror of
https://github.com/mickael-kerjean/filestash.git
synced 2025-10-31 18:16:00 +08:00
66 lines
1.4 KiB
Go
66 lines
1.4 KiB
Go
package plg_image_light
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// #cgo CFLAGS: -I./deps/src
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// #cgo pkg-config:glib-2.0
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// #include "glib-2.0/glib.h"
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// #include "libresize.h"
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import "C"
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import (
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"context"
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. "github.com/mickael-kerjean/filestash/server/common"
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"golang.org/x/sync/semaphore"
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"io"
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"time"
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"unsafe"
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)
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const (
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THUMBNAIL_TIMEOUT = 5 * time.Second
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THUMBNAIL_MAX_CONCURRENT = 50
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)
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var VIPS_LOCK = semaphore.NewWeighted(THUMBNAIL_MAX_CONCURRENT)
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func CreateThumbnail(t *Transform) (io.ReadCloser, error) {
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ctx, cancel := context.WithDeadline(context.Background(), time.Now().Add(THUMBNAIL_TIMEOUT))
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defer cancel()
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if err := VIPS_LOCK.Acquire(ctx, 1); err != nil {
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return nil, ErrCongestion
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}
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defer VIPS_LOCK.Release(1)
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imageChannel := make(chan io.ReadCloser, 1)
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go func() {
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filename := C.CString(t.Input)
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len := C.size_t(0)
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var buffer unsafe.Pointer
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if C.image_resize(filename, &buffer, &len, C.int(t.Size), boolToCInt(t.Crop), C.int(t.Quality), boolToCInt(t.Exif)) != 0 {
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C.free(unsafe.Pointer(filename))
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imageChannel <- nil
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return
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}
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C.free(unsafe.Pointer(filename))
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buf := C.GoBytes(buffer, C.int(len))
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C.g_free(C.gpointer(buffer))
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imageChannel <- NewReadCloserFromBytes(buf)
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}()
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select {
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case img := <-imageChannel:
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if img == nil {
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return nil, ErrNotValid
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}
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return img, nil
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case <-ctx.Done():
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return nil, ErrTimeout
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}
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}
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func boolToCInt(val bool) C.int {
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if val == false {
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return C.int(0)
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}
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return C.int(1)
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}
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