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Add Android APK for Silero VAD (#335)

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This commit is contained in:
Fangjun Kuang
2023-09-23 20:39:13 +08:00
committed by GitHub
parent 65ec4dc741
commit 6e60a77d89
68 changed files with 1562 additions and 45 deletions
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42
sherpa-onnx/csrc/voice-activity-detector.cc
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@@ -19,10 +19,32 @@ class VoiceActivityDetector::Impl {
config_(config),
buffer_(buffer_size_in_seconds * config.sample_rate) {}
void AcceptWaveform(const float *samples, int32_t n) {
buffer_.Push(samples, n);
#if __ANDROID_API__ >= 9
Impl(AAssetManager *mgr, const VadModelConfig &config,
float buffer_size_in_seconds = 60)
: model_(VadModel::Create(mgr, config)),
config_(config),
buffer_(buffer_size_in_seconds * config.sample_rate) {}
#endif
void AcceptWaveform(const float *samples, int32_t n) {
int32_t window_size = model_->WindowSize();
// note n is usally window_size and there is no need to use
// an extra buffer here
last_.insert(last_.end(), samples, samples + n);
int32_t k = static_cast<int32_t>(last_.size()) / window_size;
const float *p = last_.data();
bool is_speech = false;
for (int32_t i = 0; i != k; ++i, p += window_size) {
buffer_.Push(p, window_size);
is_speech = model_->IsSpeech(p, window_size);
}
last_ = std::vector<float>(
p, static_cast<const float *>(last_.data()) + last_.size());
bool is_speech = model_->IsSpeech(samples, n);
if (is_speech) {
if (start_ == -1) {
// beginning of speech
@@ -31,15 +53,15 @@ class VoiceActivityDetector::Impl {
}
} else {
// non-speech
if (start_ != -1) {
if (start_ != -1 && buffer_.Size()) {
// end of speech, save the speech segment
int32_t end = buffer_.Tail() - model_->MinSilenceDurationSamples();
std::vector<float> samples = buffer_.Get(start_, end - start_);
std::vector<float> s = buffer_.Get(start_, end - start_);
SpeechSegment segment;
segment.start = start_;
segment.samples = std::move(samples);
segment.samples = std::move(s);
segments_.push(std::move(segment));
@@ -73,6 +95,7 @@ class VoiceActivityDetector::Impl {
std::unique_ptr<VadModel> model_;
VadModelConfig config_;
CircularBuffer buffer_;
std::vector<float> last_;
int32_t start_ = -1;
};
@@ -81,6 +104,13 @@ VoiceActivityDetector::VoiceActivityDetector(
const VadModelConfig &config, float buffer_size_in_seconds /*= 60*/)
: impl_(std::make_unique<Impl>(config, buffer_size_in_seconds)) {}
#if __ANDROID_API__ >= 9
VoiceActivityDetector::VoiceActivityDetector(
AAssetManager *mgr, const VadModelConfig &config,
float buffer_size_in_seconds /*= 60*/)
: impl_(std::make_unique<Impl>(mgr, config, buffer_size_in_seconds)) {}
#endif
VoiceActivityDetector::~VoiceActivityDetector() = default;
void VoiceActivityDetector::AcceptWaveform(const float *samples, int32_t n) {