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adpcm: length check before initialization

This commit is contained in:
Trek H 2019-05-02 00:02:33 +09:30
parent d06388cfe9
commit ef9a38cb76
1 changed files with 6 additions and 1 deletions
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7
codec/adpcm/adpcm.go
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@ -259,8 +259,13 @@ func (e *encoder) init(samps []byte) {
// It writes its output to the encoder's dest.
// The number of bytes written out is returned along with any error that occured.
func (e *encoder) Write(inPcm []byte) (int, error) {
// Determine if there will be a byte that won't contain two full nibbles and will need padding.
// Check that pcm has enough data to initialize decoder
pcmLen := len(inPcm)
if pcmLen < 4 {
return 0, fmt.Errorf("length of given byte array must be greater than 4")
}
// Determine if there will be a byte that won't contain two full nibbles and will need padding.
pad := false
if (pcmLen-2)%4 != 0 {
pad = true