Method get_num_threads

dali/operators/imgcodec/image_decoder.h:416–420

  }

  int get_num_threads() const {
    // For the host backend, the thread pool is not available until we see the first batch.
    // this allows nvimgcodec accessing number of threads before the thread pool is available
    return num_threads_;
  }

  static nvimgcodecStatus_t static_schedule(void *instance, int device_id, int sample_idx,
                                            void *task_context,