mirror of
https://github.com/mudler/LocalAI.git
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f9a850c02a
* feat(realtime): WebRTC support Signed-off-by: Richard Palethorpe <io@richiejp.com> * fix(tracing): Show full LLM opts and deltas Signed-off-by: Richard Palethorpe <io@richiejp.com> --------- Signed-off-by: Richard Palethorpe <io@richiejp.com>
100 lines
2.7 KiB
Go
100 lines
2.7 KiB
Go
package audio
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import (
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"bytes"
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"encoding/binary"
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. "github.com/onsi/ginkgo/v2"
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. "github.com/onsi/gomega"
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)
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var _ = Describe("WAV utilities", func() {
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Describe("NewWAVHeader", func() {
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It("produces a valid 44-byte header", func() {
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hdr := NewWAVHeader(3200)
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var buf bytes.Buffer
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Expect(hdr.Write(&buf)).To(Succeed())
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Expect(buf.Len()).To(Equal(WAVHeaderSize))
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b := buf.Bytes()
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Expect(string(b[0:4])).To(Equal("RIFF"))
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Expect(string(b[8:12])).To(Equal("WAVE"))
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Expect(string(b[12:16])).To(Equal("fmt "))
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Expect(binary.LittleEndian.Uint16(b[20:22])).To(Equal(uint16(1))) // PCM
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Expect(binary.LittleEndian.Uint16(b[22:24])).To(Equal(uint16(1))) // mono
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Expect(binary.LittleEndian.Uint32(b[24:28])).To(Equal(uint32(16000)))
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Expect(binary.LittleEndian.Uint32(b[28:32])).To(Equal(uint32(32000)))
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Expect(string(b[36:40])).To(Equal("data"))
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Expect(binary.LittleEndian.Uint32(b[40:44])).To(Equal(uint32(3200)))
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})
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})
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Describe("NewWAVHeaderWithRate", func() {
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It("uses the custom sample rate", func() {
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hdr := NewWAVHeaderWithRate(4800, 24000)
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var buf bytes.Buffer
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Expect(hdr.Write(&buf)).To(Succeed())
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b := buf.Bytes()
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Expect(binary.LittleEndian.Uint32(b[24:28])).To(Equal(uint32(24000)))
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Expect(binary.LittleEndian.Uint32(b[28:32])).To(Equal(uint32(48000)))
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})
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})
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Describe("StripWAVHeader", func() {
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It("strips the 44-byte header", func() {
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pcm := []byte{0xDE, 0xAD, 0xBE, 0xEF}
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hdr := NewWAVHeader(uint32(len(pcm)))
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var buf bytes.Buffer
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Expect(hdr.Write(&buf)).To(Succeed())
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buf.Write(pcm)
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got := StripWAVHeader(buf.Bytes())
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Expect(got).To(Equal(pcm))
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})
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It("returns short data unchanged", func() {
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short := []byte{0x01, 0x02, 0x03}
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Expect(StripWAVHeader(short)).To(Equal(short))
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exact := make([]byte, WAVHeaderSize)
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Expect(StripWAVHeader(exact)).To(Equal(exact))
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})
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})
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Describe("ParseWAV", func() {
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It("returns sample rate and PCM data", func() {
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pcm := make([]byte, 100)
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for i := range pcm {
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pcm[i] = byte(i)
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}
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hdr24 := NewWAVHeaderWithRate(uint32(len(pcm)), 24000)
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var buf24 bytes.Buffer
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hdr24.Write(&buf24)
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buf24.Write(pcm)
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gotPCM, gotRate := ParseWAV(buf24.Bytes())
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Expect(gotRate).To(Equal(24000))
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Expect(gotPCM).To(Equal(pcm))
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hdr16 := NewWAVHeader(uint32(len(pcm)))
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var buf16 bytes.Buffer
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hdr16.Write(&buf16)
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buf16.Write(pcm)
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gotPCM, gotRate = ParseWAV(buf16.Bytes())
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Expect(gotRate).To(Equal(16000))
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Expect(gotPCM).To(Equal(pcm))
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})
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It("returns zero rate for short data", func() {
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short := []byte{0x01, 0x02, 0x03}
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gotPCM, gotRate := ParseWAV(short)
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Expect(gotRate).To(Equal(0))
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Expect(gotPCM).To(Equal(short))
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})
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})
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})
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