Add Go API for audio tagging (#1840)

@@ -26,6 +26,8 @@ jobs:
         include:
           - os: ubuntu-latest
             arch: amd64
+          - os: ubuntu-22.04-arm
+            arch: arm64
           - os: macos-13
             arch: amd64
           - os: macos-14
@@ -460,6 +462,19 @@ jobs:
           ./run-tdnn-yesno.sh
           rm -rf sherpa-onnx-tdnn-yesno
 
+      - name: Test audio tagging (Linux/macOS)
+        if: matrix.os != 'windows-latest'
+        shell: bash
+        run: |
+          cd go-api-examples/audio-tagging
+          ls -lh
+          go mod tidy
+          cat go.mod
+          go build
+          ls -lh
+
+          ./run.sh
+
       - name: Test streaming decoding files (Linux/macOS)
         if: matrix.os != 'windows-latest'
         shell: bash

@@ -33,7 +33,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        os: [macos-latest, macos-13, ubuntu-latest, windows-latest]
+        os: [macos-latest, macos-13, ubuntu-latest, windows-latest, ubuntu-22.04-arm]
 
     steps:
       - uses: actions/checkout@v4
@@ -87,7 +87,7 @@ jobs:
             make -j2 install
           fi
 
-          if [[ ${{ matrix.os }} == ubuntu-latest ]]; then
+          if [[ ${{ matrix.os }} == ubuntu-latest || ${{ matrix.os }} == ubuntu-22.04-arm ]]; then
             cp -v ./lib/*.so $upload_dir
             cp -v _deps/onnxruntime-src/lib/libonnxruntime*so* $upload_dir
 
@@ -132,6 +132,15 @@ jobs:
           name: ${{ matrix.os }}-libs
           path: to-upload/
 
+      - name: Test audio tagging
+        shell: bash
+        run: |
+          cd scripts/go/_internal/audio-tagging/
+
+          ./run.sh
+
+          ls -lh
+
       - name: Test Keyword spotting
         shell: bash
         run: |

+module audio-tagging
+
+go 1.12
+

+package main
+
+import (
+	"fmt"
+	sherpa "github.com/k2-fsa/sherpa-onnx-go/sherpa_onnx"
+	"log"
+)
+
+func main() {
+	config := sherpa.AudioTaggingConfig{}
+	config.Model.Zipformer.Model = "./sherpa-onnx-zipformer-small-audio-tagging-2024-04-15/model.int8.onnx"
+	config.Model.NumThreads = 1
+	config.Model.Debug = 1
+	config.Model.Provider = "cpu"
+	config.Labels = "./sherpa-onnx-zipformer-small-audio-tagging-2024-04-15/class_labels_indices.csv"
+	config.TopK = 5
+
+	tagging := sherpa.NewAudioTagging(&config)
+	defer sherpa.DeleteAudioTagging(tagging)
+
+	wave_filename := "./sherpa-onnx-zipformer-small-audio-tagging-2024-04-15/test_wavs/3.wav"
+
+	wave := sherpa.ReadWave(wave_filename)
+	if wave == nil {
+		log.Printf("Failed to read %v\n", wave_filename)
+		return
+	}
+
+	stream := sherpa.NewAudioTaggingStream(tagging)
+	defer sherpa.DeleteOfflineStream(stream)
+
+	stream.AcceptWaveform(wave.SampleRate, wave.Samples)
+
+	result := tagging.Compute(stream, 10)
+	fmt.Printf("the tagging result: %v\n", result)
+}

+#!/usr/bin/env bash
+
+if [ ! -f ./sherpa-onnx-zipformer-small-audio-tagging-2024-04-15/model.int8.onnx ]; then
+  curl -SL -O https://github.com/k2-fsa/sherpa-onnx/releases/download/audio-tagging-models/sherpa-onnx-zipformer-small-audio-tagging-2024-04-15.tar.bz2
+
+  tar xvf sherpa-onnx-zipformer-small-audio-tagging-2024-04-15.tar.bz2
+  rm sherpa-onnx-zipformer-small-audio-tagging-2024-04-15.tar.bz2
+fi
+
+go mod tidy
+go build
+
+./audio-tagging

+audio-tagging

+module audio-tagging
+
+go 1.12
+
+replace github.com/k2-fsa/sherpa-onnx-go/sherpa_onnx => ../

+../../../../go-api-examples/audio-tagging/main.go
\ No newline at end of file

+../../../../go-api-examples/audio-tagging/run.sh
\ No newline at end of file

+../../../../build/lib
\ No newline at end of file

@@ -1607,3 +1607,95 @@ func (spotter *KeywordSpotter) GetResult(s *OnlineStream) *KeywordSpotterResult
 	result.Keyword = C.GoString(p.keyword)
 	return result
 }
+
+// Configuration for the audio tagging.
+type OfflineZipformerAudioTaggingModelConfig struct {
+	Model string
+}
+
+type AudioTaggingModelConfig struct {
+	Zipformer  OfflineZipformerAudioTaggingModelConfig
+	Ced        string
+	NumThreads int32
+	Debug      int32
+	Provider   string
+}
+
+type AudioTaggingConfig struct {
+	Model  AudioTaggingModelConfig
+	Labels string
+	TopK   int32
+}
+
+type AudioTagging struct {
+	impl *C.struct_SherpaOnnxAudioTagging
+}
+
+type AudioEvent struct {
+	Name  string
+	Index int
+	Prob  float32
+}
+
+func DeleteAudioTagging(tagging *AudioTagging) {
+	C.SherpaOnnxDestroyAudioTagging(tagging.impl)
+	tagging.impl = nil
+}
+
+// The user is responsible to invoke [DeleteAudioTagging]() to free
+// the returned tagger to avoid memory leak
+func NewAudioTagging(config *AudioTaggingConfig) *AudioTagging {
+	c := C.struct_SherpaOnnxAudioTaggingConfig{}
+
+	c.model.zipformer.model = C.CString(config.Model.Zipformer.Model)
+	defer C.free(unsafe.Pointer(c.model.zipformer.model))
+
+	c.model.ced = C.CString(config.Model.Ced)
+	defer C.free(unsafe.Pointer(c.model.ced))
+
+	c.model.num_threads = C.int(config.Model.NumThreads)
+
+	c.model.provider = C.CString(config.Model.Provider)
+	defer C.free(unsafe.Pointer(c.model.provider))
+
+	c.model.debug = C.int(config.Model.Debug)
+
+	c.labels = C.CString(config.Labels)
+	defer C.free(unsafe.Pointer(c.labels))
+
+	c.top_k = C.int(config.TopK)
+
+	tagging := &AudioTagging{}
+	tagging.impl = C.SherpaOnnxCreateAudioTagging(&c)
+
+	return tagging
+}
+
+// The user is responsible to invoke [DeleteOfflineStream]() to free
+// the returned stream to avoid memory leak
+func NewAudioTaggingStream(tagging *AudioTagging) *OfflineStream {
+	stream := &OfflineStream{}
+	stream.impl = C.SherpaOnnxAudioTaggingCreateOfflineStream(tagging.impl)
+	return stream
+}
+
+func (tagging *AudioTagging) Compute(s *OfflineStream, topK int32) []AudioEvent {
+	r := C.SherpaOnnxAudioTaggingCompute(tagging.impl, s.impl, C.int(topK))
+	defer C.SherpaOnnxAudioTaggingFreeResults(r)
+	result := make([]AudioEvent, 0)
+
+	p := (*[1 << 28]*C.struct_SherpaOnnxAudioEvent)(unsafe.Pointer(r))
+	i := 0
+	for {
+		if p[i] == nil {
+			break
+		}
+		result = append(result, AudioEvent{
+			Name:  C.GoString(p[i].name),
+			Index: int(p[i].index),
+			Prob:  float32(p[i].prob),
+		})
+		i += 1
+	}
+	return result
+}