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ANLGBOY
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# Binaries
tts_example
example_onnx
*.exe
# Go build artifacts
*.o
*.a
*.so
# Results
results/
# Go workspace
go.work
go.work.sum

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# TTS ONNX Inference Examples
This guide provides examples for running TTS inference using `example_onnx.go`.
## Installation
This project uses Go modules for dependency management.
### Prerequisites
1. Install Go 1.21 or later from [https://golang.org/dl/](https://golang.org/dl/)
2. Install ONNX Runtime C library:
**macOS (via Homebrew):**
```bash
brew install onnxruntime
```
**Linux:**
```bash
# Download ONNX Runtime from GitHub releases
wget https://github.com/microsoft/onnxruntime/releases/download/v1.16.0/onnxruntime-linux-x64-1.16.0.tgz
tar -xzf onnxruntime-linux-x64-1.16.0.tgz
sudo cp onnxruntime-linux-x64-1.16.0/lib/* /usr/local/lib/
sudo cp -r onnxruntime-linux-x64-1.16.0/include/* /usr/local/include/
sudo ldconfig
```
### Install Go dependencies
```bash
go mod download
```
### Configure ONNX Runtime Library Path (Optional)
If the ONNX Runtime library is not in a standard location, set the environment variable:
**Automatic Detection (Recommended):**
```bash
# macOS
export ONNXRUNTIME_LIB_PATH=$(brew --prefix onnxruntime 2>/dev/null)/lib/libonnxruntime.dylib
# Linux
export ONNXRUNTIME_LIB_PATH=$(find /usr/local/lib /usr/lib -name "libonnxruntime.so*" 2>/dev/null | head -n 1)
```
**Manual Configuration:**
```bash
export ONNXRUNTIME_LIB_PATH=/path/to/libonnxruntime.so # Linux
# or
export ONNXRUNTIME_LIB_PATH=/path/to/libonnxruntime.dylib # macOS
```
## Basic Usage
### Example 1: Default Inference
Run inference with default settings:
```bash
go run example_onnx.go helper.go
```
This will use:
- Voice style: `assets/voice_styles/M1.json`
- Text: "This morning, I took a walk in the park, and the sound of the birds and the breeze was so pleasant that I stopped for a long time just to listen."
- Output directory: `results/`
- Total steps: 5
- Number of generations: 4
### Example 2: Batch Inference
Process multiple voice styles and texts at once:
```bash
go run example_onnx.go helper.go \
-voice-style "assets/voice_styles/M1.json,assets/voice_styles/F1.json" \
-text "The sun sets behind the mountains, painting the sky in shades of pink and orange.|The weather is beautiful and sunny outside. A gentle breeze makes the air feel fresh and pleasant."
```
This will:
- Generate speech for 2 different voice-text pairs
- Use male voice (M1.json) for the first text
- Use female voice (F1.json) for the second text
- Process both samples in a single batch
### Example 3: High Quality Inference
Increase denoising steps for better quality:
```bash
go run example_onnx.go helper.go \
-total-step 10 \
-voice-style "assets/voice_styles/M1.json" \
-text "Increasing the number of denoising steps improves the output's fidelity and overall quality."
```
This will:
- Use 10 denoising steps instead of the default 5
- Produce higher quality output at the cost of slower inference
## Available Arguments
| Argument | Type | Default | Description |
|----------|------|---------|-------------|
| `-use-gpu` | flag | false | Use GPU for inference (default: CPU) |
| `-onnx-dir` | str | `assets/onnx` | Path to ONNX model directory |
| `-total-step` | int | 5 | Number of denoising steps (higher = better quality, slower) |
| `-n-test` | int | 4 | Number of times to generate each sample |
| `-voice-style` | str | `assets/voice_styles/M1.json` | Voice style file path(s), comma-separated |
| `-text` | str | (long default text) | Text(s) to synthesize, pipe-separated |
| `-save-dir` | str | `results` | Output directory |
## Notes
- **Batch Processing**: The number of `-voice-style` files must match the number of `-text` entries
- **Quality vs Speed**: Higher `-total-step` values produce better quality but take longer
- **GPU Support**: GPU mode is not supported yet
## Building a Binary
To build a standalone executable:
```bash
go build -o tts_example example_onnx.go helper.go
```
Then run it:
```bash
./tts_example -voice-style "../assets/voice_styles/M1.json" -text "Hello world"
```

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../assets

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package main
import (
"flag"
"fmt"
"os"
"path/filepath"
"strings"
ort "github.com/yalue/onnxruntime_go"
)
// Args holds command line arguments
type Args struct {
useGPU bool
onnxDir string
totalStep int
nTest int
voiceStyle []string
text []string
saveDir string
}
func parseArgs() *Args {
args := &Args{}
flag.BoolVar(&args.useGPU, "use-gpu", false, "Use GPU for inference (default: CPU)")
flag.StringVar(&args.onnxDir, "onnx-dir", "assets/onnx", "Path to ONNX model directory")
flag.IntVar(&args.totalStep, "total-step", 5, "Number of denoising steps")
flag.IntVar(&args.nTest, "n-test", 4, "Number of times to generate")
flag.StringVar(&args.saveDir, "save-dir", "results", "Output directory")
var voiceStyleStr, textStr string
flag.StringVar(&voiceStyleStr, "voice-style", "assets/voice_styles/M1.json", "Voice style file path(s), comma-separated")
flag.StringVar(&textStr, "text", "This morning, I took a walk in the park, and the sound of the birds and the breeze was so pleasant that I stopped for a long time just to listen.", "Text(s) to synthesize, pipe-separated")
flag.Parse()
// Parse comma-separated voice-style
if voiceStyleStr != "" {
args.voiceStyle = strings.Split(voiceStyleStr, ",")
for i := range args.voiceStyle {
args.voiceStyle[i] = strings.TrimSpace(args.voiceStyle[i])
}
}
// Parse pipe-separated text
if textStr != "" {
args.text = strings.Split(textStr, "|")
for i := range args.text {
args.text[i] = strings.TrimSpace(args.text[i])
}
}
return args
}
func main() {
fmt.Println("=== TTS Inference with ONNX Runtime (Go) ===\n")
// --- 1. Parse arguments --- //
args := parseArgs()
totalStep := args.totalStep
nTest := args.nTest
saveDir := args.saveDir
voiceStylePaths := args.voiceStyle
textList := args.text
if len(voiceStylePaths) != len(textList) {
fmt.Printf("Error: Number of voice styles (%d) must match number of texts (%d)\n",
len(voiceStylePaths), len(textList))
os.Exit(1)
}
bsz := len(voiceStylePaths)
// Initialize ONNX Runtime
if err := InitializeONNXRuntime(); err != nil {
fmt.Printf("Error initializing ONNX Runtime: %v\n", err)
os.Exit(1)
}
defer ort.DestroyEnvironment()
// --- 2. Load config --- //
cfg, err := LoadCfgs(args.onnxDir)
if err != nil {
fmt.Printf("Error loading config: %v\n", err)
os.Exit(1)
}
// --- 3. Load TTS components --- //
textToSpeech, err := LoadTextToSpeech(args.onnxDir, args.useGPU, cfg)
if err != nil {
fmt.Printf("Error loading TTS components: %v\n", err)
os.Exit(1)
}
defer textToSpeech.Destroy()
// --- 4. Load voice styles --- //
style, err := LoadVoiceStyle(voiceStylePaths, true)
if err != nil {
fmt.Printf("Error loading voice styles: %v\n", err)
os.Exit(1)
}
defer style.Destroy()
// --- 5. Synthesize speech --- //
if err := os.MkdirAll(saveDir, 0755); err != nil {
fmt.Printf("Error creating save directory: %v\n", err)
os.Exit(1)
}
for n := 0; n < nTest; n++ {
fmt.Printf("\n[%d/%d] Starting synthesis...\n", n+1, nTest)
var wav []float32
var duration []float32
Timer("Generating speech from text", func() interface{} {
w, d, err := textToSpeech.Call(textList, style, totalStep)
if err != nil {
fmt.Printf("Error generating speech: %v\n", err)
os.Exit(1)
}
wav = w
duration = d
return nil
})
// Save outputs
for i := 0; i < bsz; i++ {
fname := fmt.Sprintf("%s_%d.wav", sanitizeFilename(textList[i], 20), n+1)
wavOut := extractWavSegment(wav, duration[i], textToSpeech.SampleRate, i, bsz)
outputPath := filepath.Join(saveDir, fname)
if err := writeWavFile(outputPath, wavOut, textToSpeech.SampleRate); err != nil {
fmt.Printf("Error writing wav file: %v\n", err)
continue
}
fmt.Printf("Saved: %s\n", outputPath)
}
}
fmt.Println("\n=== Synthesis completed successfully! ===")
}

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module supertonic-tts
go 1.21
require (
github.com/go-audio/audio v1.0.0
github.com/go-audio/wav v1.1.0
github.com/mjibson/go-dsp v0.0.0-20180508042940-11479a337f12
github.com/yalue/onnxruntime_go v1.11.0
)
require github.com/go-audio/riff v1.0.0 // indirect

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github.com/go-audio/audio v1.0.0 h1:zS9vebldgbQqktK4H0lUqWrG8P0NxCJVqcj7ZpNnwd4=
github.com/go-audio/audio v1.0.0/go.mod h1:6uAu0+H2lHkwdGsAY+j2wHPNPpPoeg5AaEFh9FlA+Zs=
github.com/go-audio/riff v1.0.0 h1:d8iCGbDvox9BfLagY94fBynxSPHO80LmZCaOsmKxokA=
github.com/go-audio/riff v1.0.0/go.mod h1:l3cQwc85y79NQFCRB7TiPoNiaijp6q8Z0Uv38rVG498=
github.com/go-audio/wav v1.1.0 h1:jQgLtbqBzY7G+BM8fXF7AHUk1uHUviWS4X39d5rsL2g=
github.com/go-audio/wav v1.1.0/go.mod h1:mpe9qfwbScEbkd8uybLuIpTgHyrISw/OTuvjUW2iGtE=
github.com/mjibson/go-dsp v0.0.0-20180508042940-11479a337f12 h1:dd7vnTDfjtwCETZDrRe+GPYNLA1jBtbZeyfyE8eZCyk=
github.com/mjibson/go-dsp v0.0.0-20180508042940-11479a337f12/go.mod h1:i/KKcxEWEO8Yyl11DYafRPKOPVYTrhxiTRigjtEEXZU=
github.com/yalue/onnxruntime_go v1.11.0 h1:aKH4yPIbqfcB3SfnQWq/WxzLelkyolntHnffL3eMBHY=
github.com/yalue/onnxruntime_go v1.11.0/go.mod h1:b4X26A8pekNb1ACJ58wAXgNKeUCGEAQ9dmACut9Sm/4=

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package main
import (
"encoding/json"
"fmt"
"math"
"math/rand"
"os"
"path/filepath"
"time"
"github.com/go-audio/audio"
"github.com/go-audio/wav"
ort "github.com/yalue/onnxruntime_go"
)
// Config structures
type SpecProcessorConfig struct {
NFFT int `json:"n_fft"`
WinLength int `json:"win_length"`
HopLength int `json:"hop_length"`
NMels int `json:"n_mels"`
Eps float64 `json:"eps"`
NormMean float64 `json:"norm_mean"`
NormStd float64 `json:"norm_std"`
}
type EncoderConfig struct {
SpecProcessor SpecProcessorConfig `json:"spec_processor"`
}
type AEConfig struct {
SampleRate int `json:"sample_rate"`
BaseChunkSize int `json:"base_chunk_size"`
Encoder EncoderConfig `json:"encoder"`
}
type StyleTokenLayerConfig struct {
NStyle int `json:"n_style"`
StyleValueDim int `json:"style_value_dim"`
}
type StyleEncoderConfig struct {
StyleTokenLayer StyleTokenLayerConfig `json:"style_token_layer"`
}
type ProjOutConfig struct {
Idim int `json:"idim"`
Odim int `json:"odim"`
}
type TextEncoderConfig struct {
ProjOut ProjOutConfig `json:"proj_out"`
}
type TTLConfig struct {
ChunkCompressFactor int `json:"chunk_compress_factor"`
LatentDim int `json:"latent_dim"`
StyleEncoder StyleEncoderConfig `json:"style_encoder"`
TextEncoder TextEncoderConfig `json:"text_encoder"`
}
type DPStyleEncoderConfig struct {
StyleTokenLayer StyleTokenLayerConfig `json:"style_token_layer"`
}
type DPConfig struct {
LatentDim int `json:"latent_dim"`
ChunkCompressFactor int `json:"chunk_compress_factor"`
StyleEncoder DPStyleEncoderConfig `json:"style_encoder"`
}
type Config struct {
AE AEConfig `json:"ae"`
TTL TTLConfig `json:"ttl"`
DP DPConfig `json:"dp"`
}
// VoiceStyleData holds voice style JSON structure
type VoiceStyleData struct {
StyleTTL struct {
Data [][][]float64 `json:"data"`
Dims []int64 `json:"dims"`
Type string `json:"type"`
} `json:"style_ttl"`
StyleDP struct {
Data [][][]float64 `json:"data"`
Dims []int64 `json:"dims"`
Type string `json:"type"`
} `json:"style_dp"`
}
// UnicodeProcessor for text processing
type UnicodeProcessor struct {
indexer []int64
}
// NewUnicodeProcessor creates a new UnicodeProcessor
func NewUnicodeProcessor(unicodeIndexerPath string) (*UnicodeProcessor, error) {
indexer, err := loadJSONInt64(unicodeIndexerPath)
if err != nil {
return nil, fmt.Errorf("failed to load unicode indexer: %w", err)
}
return &UnicodeProcessor{indexer: indexer}, nil
}
// Call processes text list to text IDs and mask
func (up *UnicodeProcessor) Call(textList []string) ([][]int64, [][][]float64) {
// Preprocess texts
processedTexts := make([]string, len(textList))
for i, text := range textList {
processedTexts[i] = preprocessText(text)
}
// Get text lengths
textLengths := make([]int64, len(processedTexts))
maxLen := 0
for i, text := range processedTexts {
textLengths[i] = int64(len([]rune(text)))
if int(textLengths[i]) > maxLen {
maxLen = int(textLengths[i])
}
}
// Create text IDs
textIDs := make([][]int64, len(processedTexts))
for i, text := range processedTexts {
row := make([]int64, maxLen)
runes := []rune(text)
for j, r := range runes {
unicodeVal := int(r)
if unicodeVal < len(up.indexer) {
row[j] = up.indexer[unicodeVal]
} else {
row[j] = -1
}
}
textIDs[i] = row
}
// Create text mask
textMask := lengthToMask(textLengths, maxLen)
return textIDs, textMask
}
// Utility functions
func preprocessText(text string) string {
// Simple normalization (Go doesn't have built-in NFKD normalization)
// For full Unicode normalization, use golang.org/x/text/unicode/norm
return text
}
func lengthToMask(lengths []int64, maxLen int) [][][]float64 {
bsz := len(lengths)
mask := make([][][]float64, bsz)
for i := 0; i < bsz; i++ {
row := make([]float64, maxLen)
for j := 0; j < maxLen; j++ {
if int64(j) < lengths[i] {
row[j] = 1.0
} else {
row[j] = 0.0
}
}
mask[i] = [][]float64{row}
}
return mask
}
func getTextMask(textLengths []int64, maxLen int) [][][]float64 {
return lengthToMask(textLengths, maxLen)
}
func getLatentMask(wavLengths []int64, cfg Config) [][][]float64 {
baseChunkSize := int64(cfg.AE.BaseChunkSize)
chunkCompressFactor := int64(cfg.TTL.ChunkCompressFactor)
latentSize := baseChunkSize * chunkCompressFactor
latentLengths := make([]int64, len(wavLengths))
maxLen := int64(0)
for i, wavLen := range wavLengths {
latentLengths[i] = (wavLen + latentSize - 1) / latentSize
if latentLengths[i] > maxLen {
maxLen = latentLengths[i]
}
}
return lengthToMask(latentLengths, int(maxLen))
}
func writeWavFile(filename string, audioData []float64, sampleRate int) error {
file, err := os.Create(filename)
if err != nil {
return err
}
defer file.Close()
// Convert float64 to int
intData := make([]int, len(audioData))
for i, sample := range audioData {
// Clamp to [-1, 1] and convert to 16-bit int
clamped := math.Max(-1.0, math.Min(1.0, sample))
intData[i] = int(clamped * 32767)
}
encoder := wav.NewEncoder(file, sampleRate, 16, 1, 1)
buf := &audio.IntBuffer{
Data: intData,
Format: &audio.Format{SampleRate: sampleRate, NumChannels: 1},
SourceBitDepth: 16,
}
if err := encoder.Write(buf); err != nil {
return err
}
return encoder.Close()
}
// Style holds style tensors
type Style struct {
TtlTensor *ort.Tensor[float32]
DpTensor *ort.Tensor[float32]
}
func (s *Style) Destroy() {
if s.TtlTensor != nil {
s.TtlTensor.Destroy()
}
if s.DpTensor != nil {
s.DpTensor.Destroy()
}
}
// LoadVoiceStyle loads voice style from JSON files
func LoadVoiceStyle(voiceStylePaths []string, verbose bool) (*Style, error) {
bsz := len(voiceStylePaths)
// Read first file to get dimensions
firstData, err := os.ReadFile(voiceStylePaths[0])
if err != nil {
return nil, fmt.Errorf("failed to read voice style file: %w", err)
}
var firstStyle VoiceStyleData
if err := json.Unmarshal(firstData, &firstStyle); err != nil {
return nil, fmt.Errorf("failed to parse voice style JSON: %w", err)
}
ttlDims := firstStyle.StyleTTL.Dims
dpDims := firstStyle.StyleDP.Dims
ttlDim1 := ttlDims[1]
ttlDim2 := ttlDims[2]
dpDim1 := dpDims[1]
dpDim2 := dpDims[2]
// Pre-allocate arrays with full batch size
ttlSize := int(int64(bsz) * ttlDim1 * ttlDim2)
dpSize := int(int64(bsz) * dpDim1 * dpDim2)
ttlFlat := make([]float32, ttlSize)
dpFlat := make([]float32, dpSize)
// Fill in the data
for i := 0; i < bsz; i++ {
data, err := os.ReadFile(voiceStylePaths[i])
if err != nil {
return nil, fmt.Errorf("failed to read voice style file: %w", err)
}
var voiceStyle VoiceStyleData
if err := json.Unmarshal(data, &voiceStyle); err != nil {
return nil, fmt.Errorf("failed to parse voice style JSON: %w", err)
}
// Flatten TTL data
ttlOffset := int(int64(i) * ttlDim1 * ttlDim2)
idx := 0
for _, batch := range voiceStyle.StyleTTL.Data {
for _, row := range batch {
for _, val := range row {
ttlFlat[ttlOffset+idx] = float32(val)
idx++
}
}
}
// Flatten DP data
dpOffset := int(int64(i) * dpDim1 * dpDim2)
idx = 0
for _, batch := range voiceStyle.StyleDP.Data {
for _, row := range batch {
for _, val := range row {
dpFlat[dpOffset+idx] = float32(val)
idx++
}
}
}
}
ttlShape := []int64{int64(bsz), ttlDim1, ttlDim2}
dpShape := []int64{int64(bsz), dpDim1, dpDim2}
ttlTensor, err := ort.NewTensor(ttlShape, ttlFlat)
if err != nil {
return nil, fmt.Errorf("failed to create TTL tensor: %w", err)
}
dpTensor, err := ort.NewTensor(dpShape, dpFlat)
if err != nil {
ttlTensor.Destroy()
return nil, fmt.Errorf("failed to create DP tensor: %w", err)
}
if verbose {
fmt.Printf("Loaded %d voice styles\n\n", bsz)
}
return &Style{
TtlTensor: ttlTensor,
DpTensor: dpTensor,
}, nil
}
// TextToSpeech generates speech from text
type TextToSpeech struct {
cfg Config
textProcessor *UnicodeProcessor
dpOrt *ort.DynamicAdvancedSession
textEncOrt *ort.DynamicAdvancedSession
vectorEstOrt *ort.DynamicAdvancedSession
vocoderOrt *ort.DynamicAdvancedSession
SampleRate int
baseChunkSize int
chunkCompress int
ldim int
}
func (tts *TextToSpeech) sampleNoisyLatent(durOnnx []float32) ([][][]float64, [][][]float64) {
bsz := len(durOnnx)
maxDur := float64(0)
for _, d := range durOnnx {
if float64(d) > maxDur {
maxDur = float64(d)
}
}
wavLenMax := maxDur * float64(tts.SampleRate)
wavLengths := make([]int64, bsz)
for i, d := range durOnnx {
wavLengths[i] = int64(float64(d) * float64(tts.SampleRate))
}
chunkSize := tts.baseChunkSize * tts.chunkCompress
latentLen := int((wavLenMax + float64(chunkSize) - 1) / float64(chunkSize))
latentDim := tts.ldim * tts.chunkCompress
rng := rand.New(rand.NewSource(time.Now().UnixNano()))
noisyLatent := make([][][]float64, bsz)
for b := 0; b < bsz; b++ {
batch := make([][]float64, latentDim)
for d := 0; d < latentDim; d++ {
row := make([]float64, latentLen)
for t := 0; t < latentLen; t++ {
// Box-Muller transform for normal distribution
// Add epsilon to avoid log(0)
const eps = 1e-10
u1 := math.Max(eps, rng.Float64())
u2 := rng.Float64()
row[t] = math.Sqrt(-2.0*math.Log(u1)) * math.Cos(2.0*math.Pi*u2)
}
batch[d] = row
}
noisyLatent[b] = batch
}
latentMask := getLatentMask(wavLengths, tts.cfg)
// Apply mask
for b := 0; b < bsz; b++ {
for d := 0; d < latentDim; d++ {
for t := 0; t < latentLen; t++ {
noisyLatent[b][d][t] *= latentMask[b][0][t]
}
}
}
return noisyLatent, latentMask
}
func (tts *TextToSpeech) Call(textList []string, style *Style, totalStep int) ([]float32, []float32, error) {
bsz := len(textList)
// Process text
textIDs, textMask := tts.textProcessor.Call(textList)
textIDsShape := []int64{int64(bsz), int64(len(textIDs[0]))}
textMaskShape := []int64{int64(bsz), 1, int64(len(textMask[0][0]))}
textIDsTensor := IntArrayToTensor(textIDs, textIDsShape)
defer textIDsTensor.Destroy()
textMaskTensor := ArrayToTensor(textMask, textMaskShape)
defer textMaskTensor.Destroy()
// Predict duration
dpOutputs := []ort.Value{nil}
err := tts.dpOrt.Run(
[]ort.Value{textIDsTensor, style.DpTensor, textMaskTensor},
dpOutputs,
)
if err != nil {
return nil, nil, fmt.Errorf("failed to run duration predictor: %w", err)
}
durTensor := dpOutputs[0].(*ort.Tensor[float32])
defer durTensor.Destroy()
durOnnx := durTensor.GetData()
// Encode text
textIDsTensor2 := IntArrayToTensor(textIDs, textIDsShape)
defer textIDsTensor2.Destroy()
textEncOutputs := []ort.Value{nil}
err = tts.textEncOrt.Run(
[]ort.Value{textIDsTensor2, style.TtlTensor, textMaskTensor},
textEncOutputs,
)
if err != nil {
return nil, nil, fmt.Errorf("failed to run text encoder: %w", err)
}
textEmbTensor := textEncOutputs[0].(*ort.Tensor[float32])
defer textEmbTensor.Destroy()
// Sample noisy latent
xt, latentMask := tts.sampleNoisyLatent(durOnnx)
latentShape := []int64{int64(bsz), int64(len(xt[0])), int64(len(xt[0][0]))}
latentMaskShape := []int64{int64(bsz), 1, int64(len(latentMask[0][0]))}
// Prepare constant arrays
totalStepArray := make([]float32, bsz)
for b := 0; b < bsz; b++ {
totalStepArray[b] = float32(totalStep)
}
scalarShape := []int64{int64(bsz)}
totalStepTensor, _ := ort.NewTensor(scalarShape, totalStepArray)
defer totalStepTensor.Destroy()
// Denoising loop
for step := 0; step < totalStep; step++ {
currentStepArray := make([]float32, bsz)
for b := 0; b < bsz; b++ {
currentStepArray[b] = float32(step)
}
currentStepTensor, _ := ort.NewTensor(scalarShape, currentStepArray)
noisyLatentTensor := ArrayToTensor(xt, latentShape)
latentMaskTensor := ArrayToTensor(latentMask, latentMaskShape)
textMaskTensor2 := ArrayToTensor(textMask, textMaskShape)
vectorEstOutputs := []ort.Value{nil}
err = tts.vectorEstOrt.Run(
[]ort.Value{noisyLatentTensor, textEmbTensor, style.TtlTensor, latentMaskTensor, textMaskTensor2,
currentStepTensor, totalStepTensor},
vectorEstOutputs,
)
if err != nil {
return nil, nil, fmt.Errorf("failed to run vector estimator: %w", err)
}
denoisedTensor := vectorEstOutputs[0].(*ort.Tensor[float32])
denoisedData := denoisedTensor.GetData()
// Update latent
idx := 0
for b := 0; b < bsz; b++ {
for d := 0; d < len(xt[b]); d++ {
for t := 0; t < len(xt[b][d]); t++ {
xt[b][d][t] = float64(denoisedData[idx])
idx++
}
}
}
noisyLatentTensor.Destroy()
latentMaskTensor.Destroy()
textMaskTensor2.Destroy()
currentStepTensor.Destroy()
denoisedTensor.Destroy()
}
// Generate waveform
finalLatentTensor := ArrayToTensor(xt, latentShape)
defer finalLatentTensor.Destroy()
vocoderOutputs := []ort.Value{nil}
err = tts.vocoderOrt.Run(
[]ort.Value{finalLatentTensor},
vocoderOutputs,
)
if err != nil {
return nil, nil, fmt.Errorf("failed to run vocoder: %w", err)
}
wavBatchTensor := vocoderOutputs[0].(*ort.Tensor[float32])
defer wavBatchTensor.Destroy()
wav := wavBatchTensor.GetData()
return wav, durOnnx, nil
}
func (tts *TextToSpeech) Destroy() {
if tts.dpOrt != nil {
tts.dpOrt.Destroy()
}
if tts.textEncOrt != nil {
tts.textEncOrt.Destroy()
}
if tts.vectorEstOrt != nil {
tts.vectorEstOrt.Destroy()
}
if tts.vocoderOrt != nil {
tts.vocoderOrt.Destroy()
}
}
// LoadTextToSpeech loads TTS components
func LoadTextToSpeech(onnxDir string, useGPU bool, cfg Config) (*TextToSpeech, error) {
if useGPU {
return nil, fmt.Errorf("GPU mode is not supported yet")
}
fmt.Println("Using CPU for inference\n")
// Load models
dpPath := filepath.Join(onnxDir, "duration_predictor.onnx")
textEncPath := filepath.Join(onnxDir, "text_encoder.onnx")
vectorEstPath := filepath.Join(onnxDir, "vector_estimator.onnx")
vocoderPath := filepath.Join(onnxDir, "vocoder.onnx")
dpOrt, err := ort.NewDynamicAdvancedSession(dpPath, []string{"text_ids", "style_dp", "text_mask"},
[]string{"duration"}, nil)
if err != nil {
return nil, fmt.Errorf("failed to load duration predictor: %w", err)
}
textEncOrt, err := ort.NewDynamicAdvancedSession(textEncPath, []string{"text_ids", "style_ttl", "text_mask"},
[]string{"text_emb"}, nil)
if err != nil {
return nil, fmt.Errorf("failed to load text encoder: %w", err)
}
vectorEstOrt, err := ort.NewDynamicAdvancedSession(vectorEstPath,
[]string{"noisy_latent", "text_emb", "style_ttl", "latent_mask", "text_mask", "current_step", "total_step"},
[]string{"denoised_latent"}, nil)
if err != nil {
return nil, fmt.Errorf("failed to load vector estimator: %w", err)
}
vocoderOrt, err := ort.NewDynamicAdvancedSession(vocoderPath, []string{"latent"},
[]string{"wav_tts"}, nil)
if err != nil {
return nil, fmt.Errorf("failed to load vocoder: %w", err)
}
// Load text processor
unicodeIndexerPath := filepath.Join(onnxDir, "unicode_indexer.json")
textProcessor, err := NewUnicodeProcessor(unicodeIndexerPath)
if err != nil {
return nil, err
}
textToSpeech := &TextToSpeech{
cfg: cfg,
textProcessor: textProcessor,
dpOrt: dpOrt,
textEncOrt: textEncOrt,
vectorEstOrt: vectorEstOrt,
vocoderOrt: vocoderOrt,
SampleRate: cfg.AE.SampleRate,
baseChunkSize: cfg.AE.BaseChunkSize,
chunkCompress: cfg.TTL.ChunkCompressFactor,
ldim: cfg.TTL.LatentDim,
}
return textToSpeech, nil
}
// InitializeONNXRuntime initializes ONNX Runtime environment
func InitializeONNXRuntime() error {
libPath := os.Getenv("ONNXRUNTIME_LIB_PATH")
if libPath == "" {
libPath = "/usr/local/lib/libonnxruntime.so"
if _, err := os.Stat("/usr/local/lib/libonnxruntime.dylib"); err == nil {
libPath = "/usr/local/lib/libonnxruntime.dylib"
} else if _, err := os.Stat("/usr/lib/libonnxruntime.so"); err == nil {
libPath = "/usr/lib/libonnxruntime.so"
}
}
ort.SetSharedLibraryPath(libPath)
if err := ort.InitializeEnvironment(); err != nil {
return fmt.Errorf("failed to initialize ONNX Runtime: %w\nHint: Set ONNXRUNTIME_LIB_PATH environment variable", err)
}
return nil
}
// sanitizeFilename creates a safe filename from text
func sanitizeFilename(text string, maxLen int) string {
if len(text) > maxLen {
text = text[:maxLen]
}
result := make([]rune, 0, len(text))
for _, r := range text {
if (r >= 'a' && r <= 'z') || (r >= 'A' && r <= 'Z') || (r >= '0' && r <= '9') {
result = append(result, r)
} else {
result = append(result, '_')
}
}
return string(result)
}
// extractWavSegment extracts a single audio segment from batch output
func extractWavSegment(wav []float32, duration float32, sampleRate int, index int, batchSize int) []float64 {
wavLen := int(float64(sampleRate) * float64(duration))
wavPerBatch := len(wav) / batchSize
wavStart := index * wavPerBatch
wavEnd := wavStart + wavLen
if wavEnd > len(wav) {
wavEnd = len(wav)
}
wavOut := make([]float64, wavLen)
for j := 0; j < wavLen && wavStart+j < len(wav); j++ {
wavOut[j] = float64(wav[wavStart+j])
}
return wavOut
}
// Timer measures execution time
func Timer(name string, fn func() interface{}) interface{} {
start := time.Now()
fmt.Printf("%s...\n", name)
result := fn()
elapsed := time.Since(start).Seconds()
fmt.Printf(" -> %s completed in %.2f sec\n", name, elapsed)
return result
}
// LoadCfgs loads configuration from JSON file
func LoadCfgs(onnxDir string) (Config, error) {
cfgPath := filepath.Join(onnxDir, "tts.json")
data, err := os.ReadFile(cfgPath)
if err != nil {
return Config{}, err
}
var cfg Config
if err := json.Unmarshal(data, &cfg); err != nil {
return Config{}, err
}
return cfg, nil
}
// JSON loading helpers
func loadJSONInt64(filePath string) ([]int64, error) {
data, err := os.ReadFile(filePath)
if err != nil {
return nil, err
}
var result []int64
if err := json.Unmarshal(data, &result); err != nil {
return nil, err
}
return result, nil
}
// Tensor conversion utilities
func ArrayToTensor(array [][][]float64, shape []int64) *ort.Tensor[float32] {
// Flatten array
totalSize := int64(1)
for _, dim := range shape {
totalSize *= dim
}
flat := make([]float32, totalSize)
idx := 0
for b := 0; b < len(array); b++ {
for d := 0; d < len(array[b]); d++ {
for t := 0; t < len(array[b][d]); t++ {
flat[idx] = float32(array[b][d][t])
idx++
}
}
}
tensor, err := ort.NewTensor(shape, flat)
if err != nil {
panic(err)
}
return tensor
}
func IntArrayToTensor(array [][]int64, shape []int64) *ort.Tensor[int64] {
// Flatten array
totalSize := int64(1)
for _, dim := range shape {
totalSize *= dim
}
flat := make([]int64, totalSize)
idx := 0
for b := 0; b < len(array); b++ {
for t := 0; t < len(array[b]); t++ {
flat[idx] = array[b][t]
idx++
}
}
tensor, err := ort.NewTensor(shape, flat)
if err != nil {
panic(err)
}
return tensor
}