andrewm@0: /*
andrewm@0:  *  RTAudio.h
andrewm@0:  *
andrewm@0:  *  Central control code for hard real-time audio on BeagleBone Black
andrewm@0:  *  using PRU and Xenomai Linux extensions. This code began as part
andrewm@0:  *  of the Hackable Instruments project (EPSRC) at Queen Mary University
andrewm@0:  *  of London, 2013-14.
andrewm@0:  *
andrewm@0:  *  (c) 2014 Victor Zappi and Andrew McPherson
andrewm@0:  *  Queen Mary University of London
andrewm@0:  */
andrewm@0: 
andrewm@0: 
andrewm@0: #ifndef RTAUDIO_H_
andrewm@0: #define RTAUDIO_H_
andrewm@0: 
andrewm@0: #include "render.h"
andrewm@0: 
andrewm@0: // Useful constants
andrewm@0: #define DBOX_CAPE					// New custom cape
andrewm@0: 
andrewm@0: #ifdef DBOX_CAPE
andrewm@0: #define CODEC_I2C_ADDRESS  0x18		// Address of TLV320AIC3104 codec
andrewm@0: #else
andrewm@0: #define CODEC_I2C_ADDRESS  0x1B		// Address of TLV320AIC3106 codec
andrewm@0: #endif
andrewm@0: 
andrewm@0: enum {
andrewm@0: 	kAmplifierMutePin = 61	// P8-26 controls amplifier mute
andrewm@0: };
andrewm@0: 
andrewm@0: typedef void* AuxiliaryTask;	// Opaque data type to keep track of aux tasks
andrewm@0: 
andrewm@0: // Flag that indicates when the audio will stop; can be read or
andrewm@0: // set by other components which should end at the same time as the audio
andrewm@0: extern bool gShouldStop;
andrewm@0: 
andrewm@0: int initAudio(int periodSize, int useMatrix, void *userData,
andrewm@0: 			  int codecI2CAddress = CODEC_I2C_ADDRESS, int ampMutePin = kAmplifierMutePin);
andrewm@0: int startAudio();
andrewm@0: void stopAudio();
andrewm@0: void cleanupAudio();
andrewm@0: 
andrewm@0: AuxiliaryTask createAuxiliaryTaskLoop(void (*functionToCall)(void), int priority, const char *name);
andrewm@0: void scheduleAuxiliaryTask(AuxiliaryTask task);
andrewm@0: 
andrewm@0: void setVerboseLevel(int level);
andrewm@0: 
andrewm@0: #endif /* RTAUDIO_H_ */