offline-tts-impl.h
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// sherpa-onnx/csrc/offline-tts-impl.h
//
// Copyright (c) 2023 Xiaomi Corporation
#ifndef SHERPA_ONNX_CSRC_OFFLINE_TTS_IMPL_H_
#define SHERPA_ONNX_CSRC_OFFLINE_TTS_IMPL_H_
#include <memory>
#include <stdexcept>
#include <string>
#include <vector>
#include "sherpa-onnx/csrc/macros.h"
#include "sherpa-onnx/csrc/offline-tts.h"
namespace sherpa_onnx {
class OfflineTtsImpl {
public:
virtual ~OfflineTtsImpl() = default;
static std::unique_ptr<OfflineTtsImpl> Create(const OfflineTtsConfig &config);
template <typename Manager>
static std::unique_ptr<OfflineTtsImpl> Create(Manager *mgr,
const OfflineTtsConfig &config);
virtual GeneratedAudio Generate(
const std::string &text, int64_t sid = 0, float speed = 1.0,
GeneratedAudioCallback callback = nullptr) const {
throw std::runtime_error(
"OfflineTtsImpl backend does not support non zero-shot Generate()");
}
virtual GeneratedAudio Generate(
const std::string &text, const std::string &prompt_text,
const std::vector<float> &prompt_samples, int32_t sample_rate,
float speed = 1.0, int32_t num_step = 4,
GeneratedAudioCallback callback = nullptr) const {
throw std::runtime_error(
"OfflineTtsImpl backend does not support zero-shot Generate()");
}
// Return the sample rate of the generated audio
virtual int32_t SampleRate() const = 0;
// Number of supported speakers.
// If it supports only a single speaker, then it return 0 or 1.
virtual int32_t NumSpeakers() const {
throw std::runtime_error(
"Zero-shot OfflineTts does not support NumSpeakers()");
}
std::vector<int64_t> AddBlank(const std::vector<int64_t> &x,
int32_t blank_id = 0) const;
};
} // namespace sherpa_onnx
#endif // SHERPA_ONNX_CSRC_OFFLINE_TTS_IMPL_H_