matcha-tts-en-c-api.c
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// c-api-examples/matcha-tts-en-c-api.c
//
// Copyright (c) 2025 Xiaomi Corporation
// This file shows how to use sherpa-onnx C API
// for English TTS with MatchaTTS.
//
// clang-format off
/*
Usage
wget https://github.com/k2-fsa/sherpa-onnx/releases/download/tts-models/matcha-icefall-en_US-ljspeech.tar.bz2
tar xvf matcha-icefall-en_US-ljspeech.tar.bz2
rm matcha-icefall-en_US-ljspeech.tar.bz2
wget https://github.com/k2-fsa/sherpa-onnx/releases/download/vocoder-models/vocos-22khz-univ.onnx
./matcha-tts-en-c-api
*/
// clang-format on
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "sherpa-onnx/c-api/c-api.h"
static int32_t ProgressCallback(const float *samples, int32_t num_samples,
float progress) {
fprintf(stderr, "Progress: %.3f%%\n", progress * 100);
// return 1 to continue generating
// return 0 to stop generating
return 1;
}
int32_t main(int32_t argc, char *argv[]) {
SherpaOnnxOfflineTtsConfig config;
memset(&config, 0, sizeof(config));
config.model.matcha.acoustic_model =
"./matcha-icefall-en_US-ljspeech/model-steps-3.onnx";
config.model.matcha.vocoder = "./vocos-22khz-univ.onnx";
config.model.matcha.tokens = "./matcha-icefall-en_US-ljspeech/tokens.txt";
config.model.matcha.data_dir =
"./matcha-icefall-en_US-ljspeech/espeak-ng-data";
config.model.num_threads = 1;
// If you don't want to see debug messages, please set it to 0
config.model.debug = 1;
const char *filename = "./generated-matcha-en.wav";
const char *text =
"Today as always, men fall into two groups: slaves and free men. Whoever "
"does not have two-thirds of his day for himself, is a slave, whatever "
"he may be: a statesman, a businessman, an official, or a scholar. "
"Friends fell out often because life was changing so fast. The easiest "
"thing in the world was to lose touch with someone.";
const SherpaOnnxOfflineTts *tts = SherpaOnnxCreateOfflineTts(&config);
int32_t sid = 0;
float speed = 1.0; // larger -> faster in speech speed
#if 0
// If you don't want to use a callback, then please enable this branch
const SherpaOnnxGeneratedAudio *audio =
SherpaOnnxOfflineTtsGenerate(tts, text, sid, speed);
#else
const SherpaOnnxGeneratedAudio *audio =
SherpaOnnxOfflineTtsGenerateWithProgressCallback(tts, text, sid, speed,
ProgressCallback);
#endif
SherpaOnnxWriteWave(audio->samples, audio->n, audio->sample_rate, filename);
SherpaOnnxDestroyOfflineTtsGeneratedAudio(audio);
SherpaOnnxDestroyOfflineTts(tts);
fprintf(stderr, "Input text is: %s\n", text);
fprintf(stderr, "Speaker ID is: %d\n", sid);
fprintf(stderr, "Saved to: %s\n", filename);
return 0;
}