Detect if running on Arduino or ESP

[koffienl]

In arduino_functions.h there is the following code:

#if (defined(__AVR_ATmega168__) || defined(__AVR_ATmega328P__)) && !defined(MAX_RECORDINGS)
  #define MAX_RECORDINGS 400   //In combination with Homeduino maximum 490*2Byte are possible. Higher values block the arduino
#endif
#if (defined(__AVR_ATmega32U4__) || defined(TEENSY20) || defined(__AVR_ATmega1280__) || defined(__AVR_ATmega1281__) || defined(__AVR_ATmega2560__) || defined(__AVR_ATmega2561__)) && !defined(MAX_RECORDINGS)
  #define MAX_RECORDINGS 512   //on the bigger arduino we have enough SRAM
#endif
#if !defined(MAX_RECORDINGS)
  #define MAX_RECORDINGS 255   // fallback for undefined Processor.
#endif

To get this ocde working on ESP I have changed the the line #define MAX_RECORDINGS 255 into #define MAX_RECORDINGS 400
Would be nice if we could make an ESP detection. I was thinking to put ESP.getChipId() in there, but that would'nt compile at all when the board is an Arduino.

Any thoughts about this? Just set the MAX_RECORDINGS higher for undefined or try to recognize an ESP so this could is easily switched between Arduino and ESP ?