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audio/mp3: add (*Stream).SampleRate

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Updates #2996
This commit is contained in:
Hajime Hoshi 2024-05-18 20:13:36 +09:00
parent d2c58dac8c
commit ac83181403
1 changed files with 8 additions and 0 deletions
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8
audio/mp3/decode.go
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@ -31,6 +31,7 @@ import (
type Stream struct { type Stream struct {
orig *mp3.Decoder orig *mp3.Decoder
resampling *convert.Resampling resampling *convert.Resampling
sampleRate int
} }
// Read is implementation of io.Reader's Read. // Read is implementation of io.Reader's Read.
@ -57,6 +58,11 @@ func (s *Stream) Length() int64 {
return s.orig.Length() return s.orig.Length()
} }
// SampleRate returns the sample rate of the decoded stream.
func (s *Stream) SampleRate() int {
return s.sampleRate
}
// DecodeWithoutResampling decodes an MP3 source and returns a decoded stream. // DecodeWithoutResampling decodes an MP3 source and returns a decoded stream.
// //
// DecodeWithoutResampling returns error when decoding fails or IO error happens. // DecodeWithoutResampling returns error when decoding fails or IO error happens.
@ -73,6 +79,7 @@ func DecodeWithoutResampling(src io.Reader) (*Stream, error) {
s := &Stream{ s := &Stream{
orig: d, orig: d,
resampling: nil, resampling: nil,
sampleRate: d.SampleRate(),
} }
return s, nil return s, nil
} }
@ -103,6 +110,7 @@ func DecodeWithSampleRate(sampleRate int, src io.Reader) (*Stream, error) {
s := &Stream{ s := &Stream{
orig: d, orig: d,
resampling: r, resampling: r,
sampleRate: sampleRate,
} }
return s, nil return s, nil
} }