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| function webWavPlay(f32array){ | |
| const blob = float32ArrayToWav(f32array) | |
| const url = createObjectUrlFromBlob(blob) | |
| playAudioFromUrl(url) | |
| return blob | |
| } | |
| function createObjectUrlFromBlob(blob) { | |
| const url = URL.createObjectURL(blob); | |
| return url; | |
| } | |
| function playAudioFromUrl(url) { | |
| const audio = new Audio(url); | |
| audio.play().catch(error => console.error('Failed to play audio:', error)); | |
| } | |
| //I copied | |
| //https://huggingface.co/spaces/k2-fsa/web-assembly-tts-sherpa-onnx-de/blob/main/app-tts.js | |
| // this function is copied/modified from | |
| // https://gist.github.com/meziantou/edb7217fddfbb70e899e | |
| function float32ArrayToWav(floatSamples, sampleRate=22050) { | |
| let samples = new Int16Array(floatSamples.length); | |
| for (let i = 0; i < samples.length; ++i) { | |
| let s = floatSamples[i]; | |
| if (s >= 1) | |
| s = 1; | |
| else if (s <= -1) | |
| s = -1; | |
| samples[i] = s * 32767; | |
| } | |
| let buf = new ArrayBuffer(44 + samples.length * 2); | |
| var view = new DataView(buf); | |
| // http://soundfile.sapp.org/doc/WaveFormat/ | |
| // F F I R | |
| view.setUint32(0, 0x46464952, true); // chunkID | |
| view.setUint32(4, 36 + samples.length * 2, true); // chunkSize | |
| // E V A W | |
| view.setUint32(8, 0x45564157, true); // format | |
| // | |
| // t m f | |
| view.setUint32(12, 0x20746d66, true); // subchunk1ID | |
| view.setUint32(16, 16, true); // subchunk1Size, 16 for PCM | |
| view.setUint32(20, 1, true); // audioFormat, 1 for PCM | |
| view.setUint16(22, 1, true); // numChannels: 1 channel | |
| view.setUint32(24, sampleRate, true); // sampleRate | |
| view.setUint32(28, sampleRate * 2, true); // byteRate | |
| view.setUint16(32, 2, true); // blockAlign | |
| view.setUint16(34, 16, true); // bitsPerSample | |
| view.setUint32(36, 0x61746164, true); // Subchunk2ID | |
| view.setUint32(40, samples.length * 2, true); // subchunk2Size | |
| let offset = 44; | |
| for (let i = 0; i < samples.length; ++i) { | |
| view.setInt16(offset, samples[i], true); | |
| offset += 2; | |
| } | |
| return new Blob([view], {type: 'audio/wav'}); | |
| } | |
| export { webWavPlay }; |