269a7ef90d
Tested on Win64 with mingw-w64 and http://kcat.strangesoft.net/openal-binaries/openal-soft-1.18.2-bin.zip Change-Id: Iec1bf3c0898310878133dc6d9ecfb8781b410347 GitHub-Last-Rev: a71e8eb2b9046b499e1a1911e55cc2534aff8e71 GitHub-Pull-Request: golang/mobile#18 Reviewed-on: https://go-review.googlesource.com/114003 Reviewed-by: Elias Naur <elias.naur@gmail.com>
75 lines
1.4 KiB
Go
75 lines
1.4 KiB
Go
// Copyright 2015 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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// +build darwin linux windows
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package al
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import (
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"errors"
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"sync"
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"unsafe"
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)
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var (
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mu sync.Mutex
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device unsafe.Pointer
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context unsafe.Pointer
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)
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// DeviceError returns the last known error from the current device.
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func DeviceError() int32 {
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return alcGetError(device)
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}
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// TODO(jbd): Investigate the cases where multiple audio output
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// devices might be needed.
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// OpenDevice opens the default audio device.
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// Calls to OpenDevice are safe for concurrent use.
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func OpenDevice() error {
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mu.Lock()
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defer mu.Unlock()
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// already opened
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if device != nil {
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return nil
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}
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dev := alcOpenDevice("")
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if dev == nil {
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return errors.New("al: cannot open the default audio device")
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}
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ctx := alcCreateContext(dev, nil)
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if ctx == nil {
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alcCloseDevice(dev)
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return errors.New("al: cannot create a new context")
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}
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if !alcMakeContextCurrent(ctx) {
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alcCloseDevice(dev)
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return errors.New("al: cannot make context current")
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}
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device = dev
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context = ctx
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return nil
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}
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// CloseDevice closes the device and frees related resources.
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// Calls to CloseDevice are safe for concurrent use.
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func CloseDevice() {
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mu.Lock()
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defer mu.Unlock()
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if device == nil {
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return
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}
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alcCloseDevice(device)
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if context != nil {
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alcDestroyContext(context)
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}
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device = nil
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context = nil
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}
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