From 7fbd71cecc201c6b1820d4d2897edf4206b6fd75 Mon Sep 17 00:00:00 2001
From: faiface <faiface@ksp.sk>
Date: Fri, 14 Jul 2017 02:22:33 +0200
Subject: [PATCH] audio: wav: more precise Position and Seek
---
audio/wav/decode.go | 5 ++---
1 file changed, 2 insertions(+), 3 deletions(-)
diff --git a/audio/wav/decode.go b/audio/wav/decode.go
index 0d00ba7..dfbd0f4 100644
--- a/audio/wav/decode.go
+++ b/audio/wav/decode.go
@@ -94,15 +94,14 @@ func (s *decoder) Duration() time.Duration {
func (s *decoder) Position() time.Duration {
frameIndex := time.Duration(s.pos / int32(s.h.BytesPerFrame))
- frameTime := time.Second / time.Duration(s.h.SampleRate)
- return frameIndex * frameTime
+ return frameIndex * time.Second / time.Duration(s.h.SampleRate)
}
func (s *decoder) Seek(d time.Duration) error {
if d < 0 || s.Duration() < d {
return fmt.Errorf("wav: seek duration %v out of range [%v, %v]", d, 0, s.Duration())
}
- frame := int32(d / (time.Second / time.Duration(s.h.SampleRate)))
+ frame := int32(d * time.Duration(s.h.SampleRate) / time.Second)
pos := frame * int32(s.h.BytesPerFrame)
_, err := s.rsc.Seek(int64(pos)+44, io.SeekStart) // 44 is the size of the header
if err != nil {
--
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