Function get_num_codebooks

encodec.cpp:148–153

}

static int32_t get_num_codebooks(float bandwidth, int hop_length, float sample_rate) {
    // The number of codebooks is determined by the bandwidth selected.
    // Supported bandwidths are 1.5kbps (n_q = 2), 3 kbps (n_q = 4), 6 kbps (n_q = 8),
    // 12 kbps (n_q = 16) and 24kbps (n_q = 32).
    return (int32_t) ceilf(1000 * bandwidth / (ceilf(sample_rate / hop_length) * 10));
}

static int32_t get_bandwidth_per_quantizer(int bins, float frame_rate) {
    return log2f((float) bins) * frame_rate;