mth/ebiten
1
0
Fork 0
mirror of https://github.com/hajimehoshi/ebiten.git synced 2024-12-24 18:58:54 +01:00
Code Issues Packages Projects Releases Wiki Activity

audio/wav: Parse header more accurately

Browse Source
This commit is contained in:
Hajime Hoshi 2016-03-30 03:03:08 +09:00
parent 4e50588c0c
commit e0a058bcc3
1 changed files with 11 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

16
exp/audio/wav/decode.go
View File

@ -91,13 +91,19 @@ chunks:
if err != nil { if err != nil {
return nil, err return nil, err
} }
// TODO: Remove this magic number format := int(buf[0]) | int(buf[1])<<8
if buf[2] != 2 { if format != 1 {
return nil, fmt.Errorf("wav: invalid header: channel num must be 2") return nil, fmt.Errorf("wav: format must be linear PCM")
} }
channelNum := int(buf[2]) | int(buf[3])<<8
// TODO: Remove this magic number // TODO: Remove this magic number
if buf[14] != 16 { if channelNum != 2 {
return nil, fmt.Errorf("wav: invalid header: depth must be 16") return nil, fmt.Errorf("wav: channel num must be 2")
}
bitsPerSample := int(buf[14]) | int(buf[15])<<8
// TODO: Remove this magic number
if bitsPerSample != 16 {
return nil, fmt.Errorf("wav: bits per sample must be 16")
} }
sampleRate := int64(buf[4]) | int64(buf[5])<<8 | int64(buf[6])<<16 | int64(buf[7]<<24) sampleRate := int64(buf[4]) | int64(buf[5])<<8 | int64(buf[6])<<16 | int64(buf[7]<<24)
if int64(context.SampleRate()) != sampleRate { if int64(context.SampleRate()) != sampleRate {