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39 lines
1.1 KiB
39 lines
1.1 KiB
package filetrans
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import (
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"encoding/binary"
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"testing"
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)
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func wavHeader(channels uint16) []byte {
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b := make([]byte, 44)
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copy(b[0:4], "RIFF")
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binary.LittleEndian.PutUint32(b[4:8], 36)
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copy(b[8:12], "WAVE")
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copy(b[12:16], "fmt ")
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binary.LittleEndian.PutUint32(b[16:20], 16)
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binary.LittleEndian.PutUint16(b[20:22], 1)
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binary.LittleEndian.PutUint16(b[22:24], channels)
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binary.LittleEndian.PutUint32(b[24:28], 16000)
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copy(b[36:40], "data")
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return b
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}
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func TestWavChannelsFromHeader(t *testing.T) {
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if got := wavChannelsFromHeader(wavHeader(2)); got != 2 {
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t.Fatalf("stereo: got %d", got)
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}
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if got := wavChannelsFromHeader(wavHeader(1)); got != 1 {
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t.Fatalf("mono: got %d", got)
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}
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// 客户端 WavWriter 的头只有 44 字节，但取 64 字节的 Range 会带上 data 的前 20 字节
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if got := wavChannelsFromHeader(append(wavHeader(2), make([]byte, 20)...)); got != 2 {
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t.Fatalf("stereo+data: got %d", got)
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}
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if got := wavChannelsFromHeader([]byte("OggS\x00\x02")); got != 0 {
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t.Fatalf("ogg: got %d", got)
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}
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if got := wavChannelsFromHeader(wavHeader(2)[:20]); got != 0 {
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t.Fatalf("truncated: got %d", got)
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}
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}
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