Function sparse_mel_starts

src/framework/audio/dsp.cpp:219–231

}

std::vector<int64_t> sparse_mel_starts(const AudioTensor & filterbank) {
    const int64_t n_mels = filterbank.shape[0];
    const int64_t freq_bins = filterbank.shape[1];
    std::vector<int64_t> starts(static_cast<size_t>(n_mels), 0);
    for (int64_t mel = 0; mel < n_mels; ++mel) {
        int64_t start = 0;
        while (start < freq_bins && filterbank.values[static_cast<size_t>(mel * freq_bins + start)] == 0.0f) {
            ++start;
        }
        starts[static_cast<size_t>(mel)] = start;
    }
    return starts;
}

std::vector<int64_t> sparse_mel_ends(const AudioTensor & filterbank) {
    const int64_t n_mels = filterbank.shape[0];