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audio: add ResampleReader and ResampleReaderF32

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Closes #3194
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Hajime Hoshi 2025-02-11 17:41:36 +09:00
parent fdddb0e265
commit 33d30d8914
1 changed files with 31 additions and 1 deletions
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32
audio/audio.go
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@ -553,12 +553,40 @@ func (h *hookerImpl) AppendHookOnBeforeUpdate(f func() error) {
hook.AppendHookOnBeforeUpdate(f) hook.AppendHookOnBeforeUpdate(f)
} }
// ResampleReader converts the sample rate of the given singed 16bit integer, little-endian, 2 channels (stereo) stream.
// size is the length of the source stream in bytes.
// from is the original sample rate.
// to is the target sample rate.
//
// If the original sample rate equals to the new one, ResampleReader returns source as it is.
func ResampleReader(source io.Reader, size int64, from, to int) io.Reader {
if from == to {
return source
}
return convert.NewResampling(source, size, from, to, bitDepthInBytesInt16)
}
// ResampleReaderF32 converts the sample rate of the given 32bit float, little-endian, 2 channels (stereo) stream.
// size is the length of the source stream in bytes.
// from is the original sample rate.
// to is the target sample rate.
//
// If the original sample rate equals to the new one, ResampleReaderF32 returns source as it is.
func ResampleReaderF32(source io.Reader, size int64, from, to int) io.Reader {
if from == to {
return source
}
return convert.NewResampling(source, size, from, to, bitDepthInBytesFloat32)
}
// Resample converts the sample rate of the given singed 16bit integer, little-endian, 2 channels (stereo) stream. // Resample converts the sample rate of the given singed 16bit integer, little-endian, 2 channels (stereo) stream.
// size is the length of the source stream in bytes. // size is the length of the source stream in bytes.
// from is the original sample rate. // from is the original sample rate.
// to is the target sample rate. // to is the target sample rate.
// //
// If the original sample rate equals to the new one, Resample returns source as it is. // If the original sample rate equals to the new one, Resample returns source as it is.
//
// Deprecated: as of v2.9. Use ResampleReader instead.
func Resample(source io.ReadSeeker, size int64, from, to int) io.ReadSeeker { func Resample(source io.ReadSeeker, size int64, from, to int) io.ReadSeeker {
if from == to { if from == to {
return source return source
@ -571,7 +599,9 @@ func Resample(source io.ReadSeeker, size int64, from, to int) io.ReadSeeker {
// from is the original sample rate. // from is the original sample rate.
// to is the target sample rate. // to is the target sample rate.
// //
// If the original sample rate equals to the new one, Resample returns source as it is. // If the original sample rate equals to the new one, ResampleF32 returns source as it is.
//
// Deprecated: as of v2.9. Use ResampleReaderF32 instead.
func ResampleF32(source io.ReadSeeker, size int64, from, to int) io.ReadSeeker { func ResampleF32(source io.ReadSeeker, size int64, from, to int) io.ReadSeeker {
if from == to { if from == to {
return source return source