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audio: Bug fix: possible overflow and closing nil channel

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This commit is contained in:
Hajime Hoshi 2017-07-02 16:28:02 +09:00
parent 364819f361
commit 45ca2a1f79
1 changed files with 7 additions and 5 deletions
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12
audio/audio.go
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@ -402,7 +402,6 @@ func (p *Player) readToBuffer(length int) (int, error) {
if p.readingCh == nil {
p.readingCh = make(chan readingResult)
go func() {
defer close(p.readingCh)
b := make([]uint8, length)
p.srcM.Lock()
n, err := p.src.Read(b)
@ -422,19 +421,22 @@ func (p *Player) readToBuffer(length int) (int, error) {
case pos := <-p.seekCh:
p.buf = []uint8{}
p.pos = pos
return 0, nil
case r := <-p.readingCh:
close(p.readingCh)
p.readingCh = nil
if r.err != nil {
return 0, r.err
}
if len(r.data) > 0 {
p.buf = append(p.buf, r.data...)
}
p.readingCh = nil
return len(p.buf), nil
case <-time.After(15 * time.Millisecond):
return length, nil
if l := length - len(p.buf); l > 0 {
empty := make([]uint8, l)
p.buf = append(p.buf, empty...)
}
}
return len(p.buf), nil
}
func (p *Player) bufferToInt16(lengthInBytes int) []int16 {