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Merge pull request #345 from kercre123/ui-api-overhaul
UI changes
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,108 @@ | ||
| package wirepod_ttr | ||
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|
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| // TODO | ||
| // import ( | ||
| // "bytes" | ||
| // "encoding/binary" | ||
| // "math" | ||
|
|
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| // "github.com/zaf/resample" | ||
| // ) | ||
|
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| // func bytesToInt16s(data []byte) []int16 { | ||
| // int16s := make([]int16, len(data)/2) | ||
| // for i := range int16s { | ||
| // int16s[i] = int16(binary.LittleEndian.Uint16(data[i*2 : i*2+2])) | ||
| // } | ||
| // return int16s | ||
| // } | ||
|
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| // func int16sToBytes(data []int16) []byte { | ||
| // bytes := make([]byte, len(data)*2) | ||
| // for i, val := range data { | ||
| // binary.LittleEndian.PutUint16(bytes[i*2:], uint16(val)) | ||
| // } | ||
| // return bytes | ||
| // } | ||
|
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| // // entry-point (go, not defaulgt) | ||
| // func downsample24kTo16k(input []byte) [][]byte { | ||
| // iVolBytes := increaseVolume(input, 6) | ||
| // outBytes := downsample24kTo16kLinear(iVolBytes) | ||
| // var audioChunks [][]byte | ||
| // // the "s" sounds are harsh. put through filter | ||
| // //filteredBytes := lowPassFilter(outBytes, 4000, 16000) | ||
| // for len(outBytes) >= 1024 { | ||
| // audioChunks = append(audioChunks, outBytes[:1024]) | ||
| // outBytes = outBytes[1024:] | ||
| // } | ||
|
|
||
| // return audioChunks | ||
| // } | ||
|
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| // func increaseVolume(data []byte, factor float64) []byte { | ||
| // int16s := bytesToInt16s(data) | ||
|
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| // for i := range int16s { | ||
| // scaled := float64(int16s[i]) * factor | ||
| // if scaled > math.MaxInt16 { | ||
| // int16s[i] = math.MaxInt16 | ||
| // } else if scaled < math.MinInt16 { | ||
| // int16s[i] = math.MinInt16 | ||
| // } else { | ||
| // int16s[i] = int16(scaled) | ||
| // } | ||
| // } | ||
|
|
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| // return int16sToBytes(int16s) | ||
| // } | ||
|
|
||
| // // this is copied | ||
| // func lowPassFilter(data []byte, cutoffFreq float64, sampleRate int) []byte { | ||
| // int16s := bytesToInt16s(data) | ||
| // filtered := make([]int16, len(int16s)) | ||
| // rc := 1.0 / (2 * 3.1416 * cutoffFreq) | ||
| // dt := 1.0 / float64(sampleRate) | ||
| // alpha := dt / (rc + dt) | ||
| // filtered[0] = int16s[0] | ||
| // for i := 1; i < len(int16s); i++ { | ||
| // current := alpha*float64(int16s[i]) + (1-alpha)*float64(filtered[i-1]) | ||
| // filtered[i] = int16(current) | ||
| // } | ||
|
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||
| // return int16sToBytes(filtered) | ||
| // } | ||
|
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||
| // // technically copied too | ||
| // func downsample24kTo16kLinear(input []byte) []byte { | ||
| // int16s := bytesToInt16s(input) | ||
| // outputLength := (len(int16s) * 2) / 3 | ||
| // output := make([]int16, outputLength) | ||
|
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||
| // j := 0 | ||
| // for i := 0; i < len(int16s)-2; i += 3 { | ||
| // first := (2*int32(int16s[i]) + int32(int16s[i+1])) / 3 | ||
| // second := (int32(int16s[i+1]) + 2*int32(int16s[i+2])) / 3 | ||
| // output[j] = int16(first) | ||
| // output[j+1] = int16(second) | ||
| // j += 2 | ||
| // } | ||
|
|
||
| // return int16sToBytes(output) | ||
| // } | ||
|
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| // // entry-point (soxr) | ||
| // func downsampleAudioSoxr(input []byte) [][]byte { | ||
| // newBytes := new(bytes.Buffer) | ||
| // dec, _ := resample.New(newBytes, 24000, 16000, 1, resample.I16, resample.VeryHighQ) | ||
| // dec.Write(input) | ||
| // var audioChunks [][]byte | ||
| // decodedBytes := newBytes.Bytes() | ||
| // filteredBytes := lowPassFilter(decodedBytes, 4000, 16000) | ||
| // iVolBytes := increaseVolume(filteredBytes, 5) | ||
| // for len(iVolBytes) >= 1024 { | ||
| // audioChunks = append(audioChunks, iVolBytes[:1024]) | ||
| // iVolBytes = iVolBytes[1024:] | ||
| // } | ||
| // return audioChunks | ||
| // } |
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