lock_guard<mutex> decode_lock(global_decode_mutex_);
const int64_t chunk_end = min(
i + chunk_sample_count, sample_count);
segment_->get_samples(chunk, i, chunk_end);
lock_guard<mutex> decode_lock(global_decode_mutex_);
const int64_t chunk_end = min(
i + chunk_sample_count, sample_count);
segment_->get_samples(chunk, i, chunk_end);