mirror of
https://github.com/hajimehoshi/ebiten.git
synced 2025-01-14 13:02:08 +01:00
39 lines
1.1 KiB
Go
39 lines
1.1 KiB
Go
// Copyright 2018 The Ebiten Authors
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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// +build js,wasm
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package mp3
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import (
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"reflect"
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"syscall/js"
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"unsafe"
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)
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func float32ArrayToSlice(arr js.Value) []float32 {
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bytes := make([]byte, arr.Length()*4)
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buf := arr.Get("buffer").Call("slice", arr.Get("byteOffset"), arr.Get("byteOffset").Int()+arr.Get("byteLength").Int())
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js.ValueOf(bytes).Call("set", js.Global.Get("Uint8Array").New(buf))
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bh := (*reflect.SliceHeader)(unsafe.Pointer(&bytes))
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var f []float32
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fh := (*reflect.SliceHeader)(unsafe.Pointer(&f))
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fh.Data = bh.Data
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fh.Len = bh.Len / 4
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fh.Cap = bh.Cap / 4
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return f
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}
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