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https://github.com/hajimehoshi/ebiten.git
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992f6c767a
This change adds a Ogg/Vorbis decoder stb_vorbis.c usage that is compiled by Emscripten as WebAssembly. Fixes #623
48 lines
1.5 KiB
Go
48 lines
1.5 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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package stb
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import (
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"fmt"
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"github.com/gopherjs/gopherwasm/js"
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)
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func init() {
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// Eval wasm.js first to set the Wasm binary to Module.
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js.Global().Get("window").Call("eval", string(wasm_js))
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js.Global().Get("window").Call("eval", string(stbvorbis_js))
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js.Global().Get("window").Call("eval", string(decode_js))
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ch := make(chan struct{})
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js.Global().Get("_ebiten").Call("initializeVorbisDecoder", js.NewCallback(func([]js.Value) {
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close(ch)
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}))
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<-ch
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}
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func DecodeVorbis(buf []byte) ([]int16, int, int, error) {
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r := js.Global().Get("_ebiten").Call("decodeVorbis", buf)
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if r == js.Null() {
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return nil, 0, 0, fmt.Errorf("audio/vorbis/internal/stb: decode failed")
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}
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data := make([]int16, r.Get("data").Get("length").Int())
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// TODO: Use js.TypeArrayOf
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arr := js.ValueOf(data)
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arr.Call("set", r.Get("data"))
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return data, r.Get("channels").Int(), r.Get("sampleRate").Int(), nil
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}
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