render.cpp

/*
 * render.cpp
 *
 *  Created on: Oct 24, 2014
 *      Author: parallels
 */

#include <Bela.h>
#include <DigitalChannelManager.h>
#include <cmath>
#include <I2c_Codec.h>
#include <PRU.h>
#include <stdio.h>
#include <libpd/z_libpd.h>
#include <libpd/s_stuff.h>
#include <UdpServer.h>
#include <Midi.h>
#include <Scope.h>

//janMod
#include <fcntl.h>   /* File Control Definitions           */
#include <termios.h> /* POSIX Terminal Control Definitions */
#include <unistd.h>  /* UNIX Standard Definitions 	   */
#include <errno.h>   /* ERROR Number Definitions           */
//typedef enum { false, true } bool;


// if you are 100% sure of what value was used to compile libpd/puredata, then
// you could #define gBufLength instead of getting it at runtime. It has proved to give some 0.3%
// performance boost when it is 8 (thanks to vectorize optimizations I guess).
int gBufLength;

float* gInBuf;
float* gOutBuf;



//janMod /*
/*------------------------------- Opening the Serial Port -------------------------------*/

/* Change /dev/ttyUSB0 to the one corresponding to your system */

int fd;
/* O_RDWR   - Read/Write access to serial port       */
/* O_NOCTTY - No terminal will control the process   */
/* Open in blocking mode,read will wait              */

struct termios SerialPortSettings;	/* Create the structure                          */

char read_buffer[1024];   /* Buffer to store the data received              */
int  bytes_read = 0;    /* Number of bytes read by the read() system call */
int i = 0;
char c;

int const numChars = 32;
char receivedChars[numChars];
int ndx = 0;
char endMarker = '\n';
char rc;
bool newData = false;


AuxiliaryTask serialInputReadTask;		// Auxiliary task to read I2C
int readCount = 0;			// How long until we read again...
int readIntervalSamples = 0; // How many samples between reads
int readInterval = 50;

void serialInputRead();

int send_val = 0;
//janMod*/



void pdnoteon(int ch, int pitch, int vel) {
  printf("noteon: %d %d %d\n", ch, pitch, vel);
}

void Bela_printHook(const char *recv){
	rt_printf("%s", recv);
}
#define PARSE_MIDI
static Midi midi;
static DigitalChannelManager dcm;

void sendDigitalMessage(bool state, unsigned int delay, void* receiverName){
	libpd_float((char*)receiverName, (float)state);
//	rt_printf("%s: %d\n", (char*)receiverName, state);
}

#define LIBPD_DIGITAL_OFFSET 11 // digitals are preceded by 2 audio and 8 analogs (even if using a different number of analogs)

void Bela_messageHook(const char *source, const char *symbol, int argc, t_atom *argv){
	if(strcmp(source, "bela_setDigital") == 0){
		// symbol is the direction, argv[0] is the channel, argv[1] (optional)
		// is signal("sig" or "~") or message("message", default) rate
		bool isMessageRate = true; // defaults to message rate
		bool direction = 0; // initialize it just to avoid the compiler's warning
		bool disable = false;
		if(strcmp(symbol, "in") == 0){
			direction = INPUT;
		} else if(strcmp(symbol, "out") == 0){
			direction = OUTPUT;
		} else if(strcmp(symbol, "disable") == 0){
			disable = true;
		} else {
			return;
		}
		if(argc == 0){
			return;
		} else if (libpd_is_float(&argv[0]) == false){
			return;
		}
		int channel = libpd_get_float(&argv[0]) - LIBPD_DIGITAL_OFFSET;
		if(disable == true){
			dcm.unmanage(channel);
			return;
		}
		if(argc >= 2){
			t_atom* a = &argv[1];
			if(libpd_is_symbol(a)){
				char *s = libpd_get_symbol(a);
				if(strcmp(s, "~") == 0  || strncmp(s, "sig", 3) == 0){
					isMessageRate = false;
				}
			}
		}
		dcm.manage(channel, direction, isMessageRate);
	}
}

void Bela_floatHook(const char *source, float value){
	// let's make this as optimized as possible for built-in digital Out parsing
	// the built-in digital receivers are of the form "bela_digitalOutXX" where XX is between 11 and 26
	static int prefixLength = 15; // strlen("bela_digitalOut")
	if(strncmp(source, "bela_digitalOut", prefixLength)==0){
		if(source[prefixLength] != 0){ //the two ifs are used instead of if(strlen(source) >= prefixLength+2)
			if(source[prefixLength + 1] != 0){
				// quickly convert the suffix to integer, assuming they are numbers, avoiding to call atoi
				int receiver = ((source[prefixLength] - 48) * 10);
				receiver += (source[prefixLength+1] - 48);
				unsigned int channel = receiver - 11; // go back to the actual Bela digital channel number
				if(channel < 16){ //16 is the hardcoded value for the number of digital channels
					dcm.setValue(channel, value);
				}
			}
		}
	}
}

char receiverNames[16][21]={
	{"bela_digitalIn11"},{"bela_digitalIn12"},{"bela_digitalIn13"},{"bela_digitalIn14"},{"bela_digitalIn15"},
	{"bela_digitalIn16"},{"bela_digitalIn17"},{"bela_digitalIn18"},{"bela_digitalIn19"},{"bela_digitalIn20"},
	{"bela_digitalIn21"},{"bela_digitalIn22"},{"bela_digitalIn23"},{"bela_digitalIn24"},{"bela_digitalIn25"},
	{"bela_digitalIn26"}
};

static unsigned int gAnalogChannelsInUse;
static unsigned int gLibpdBlockSize;
// 2 audio + (up to)8 analog + (up to) 16 digital + 4 scope outputs
static const unsigned int gChannelsInUse = 30;
//static const unsigned int gFirstAudioChannel = 0;
static const unsigned int gFirstAnalogChannel = 2;
static const unsigned int gFirstDigitalChannel = 10;
static const unsigned int gFirstScopeChannel = 26;

Scope scope;
unsigned int gScopeChannelsInUse = 4;
float* gScopeOut;

bool setup(BelaContext *context, void *userData)
{
//  janMod /*
  
    fd = open("/dev/ttyUSB0", O_RDWR | O_NOCTTY);	/* ttyUSB0 is the FT232 based USB2SERIAL Converter   */
    if(fd == -1)						/* Error Checking */
        printf("\n  Error! in Opening ttyUSB0  ");
    else
        printf("\n  ttyUSB0 Opened Successfully ");
    
    
    /*---------- Setting the Attributes of the serial port using termios structure --------- */
    
    
    tcgetattr(fd, &SerialPortSettings);	/* Get the current attributes of the Serial port */
    
    /* Setting the Baud rate */
    cfsetispeed(&SerialPortSettings,B9600); /* Set Read  Speed as 9600                       */
    cfsetospeed(&SerialPortSettings,B9600); /* Set Write Speed as 9600                       */
    
    /* 8N1 Mode */
    SerialPortSettings.c_cflag &= ~PARENB;   /* Disables the Parity Enable bit(PARENB),So No Parity   */
    SerialPortSettings.c_cflag &= ~CSTOPB;   /* CSTOPB = 2 Stop bits,here it is cleared so 1 Stop bit */
    SerialPortSettings.c_cflag &= ~CSIZE;	 /* Clears the mask for setting the data size             */
    SerialPortSettings.c_cflag |=  CS8;      /* Set the data bits = 8                                 */
    
    SerialPortSettings.c_cflag &= ~CRTSCTS;       /* No Hardware flow Control                         */
    SerialPortSettings.c_cflag |= CREAD | CLOCAL; /* Enable receiver,Ignore Modem Control lines       */
    
    
    SerialPortSettings.c_iflag &= ~(IXON | IXOFF | IXANY);          /* Disable XON/XOFF flow control both i/p and o/p */
    SerialPortSettings.c_iflag &= ~(ICANON | ECHO | ECHOE | ISIG);  /* Non Cannonical mode                            */
    
    SerialPortSettings.c_oflag &= ~OPOST;/*No Output Processing*/
    
    /* Setting Time outs */
    SerialPortSettings.c_cc[VMIN] = 10; /* Read at least 10 characters */
    SerialPortSettings.c_cc[VTIME] = 0; /* Wait indefinetly   */
    
    
    if((tcsetattr(fd,TCSANOW,&SerialPortSettings)) != 0) /* Set the attributes to the termios structure*/
        printf("\n  ERROR ! in Setting attributes");
    else
        printf("\n  BaudRate = 9600 \n  StopBits = 1 \n  Parity   = none");
    
    /*------------------------------- Read data from serial port -----------------------------*/
    
    tcflush(fd, TCIFLUSH);   /* Discards old data in the rx buffer            */
    
    serialInputReadTask = Bela_createAuxiliaryTask(serialInputRead, 50, "bela-serial");
    readIntervalSamples = context->audioSampleRate / readInterval;
    
    //janMod */
 
 
    scope.setup(gScopeChannelsInUse, context->audioSampleRate);
    gScopeOut = new float[gScopeChannelsInUse];

	// Check first of all if file exists. Will actually open it later.
	char file[] = "_main.pd";
	char folder[] = "./";
	unsigned int strSize = strlen(file) + strlen(folder) + 1;
	char* str = (char*)malloc(sizeof(char) * strSize);
	snprintf(str, strSize, "%s%s", folder, file);
	if(access(str, F_OK) == -1 ) {
		printf("Error file %s/%s not found. The %s file should be your main patch.\n", folder, file, file);
		return false;
	}
	if(context->analogInChannels != context->analogOutChannels ||
			context->audioInChannels != context->audioOutChannels){
		printf("This project requires the number of inputs and the number of outputs to be the same\n");
		return false;
	}
	// analog setup
	gAnalogChannelsInUse = context->analogInChannels;

	// digital setup
	dcm.setCallback(sendDigitalMessage);
	if(context->digitalChannels > 0){
		for(unsigned int ch = 0; ch < context->digitalChannels; ++ch){
			dcm.setCallbackArgument(ch, receiverNames[ch]);
		}
	}

	midi.readFrom(0);
	midi.writeTo(0);
#ifdef PARSE_MIDI
	midi.enableParser(true);
#else
	midi.enableParser(false);
#endif /* PARSE_MIDI */
//	udpServer.bindToPort(1234);

	gLibpdBlockSize = libpd_blocksize();
	// check that we are not running with a blocksize smaller than gLibPdBlockSize
	// We could still make it work, but the load would be executed unevenly between calls to render
	if(context->audioFrames < gLibpdBlockSize){
		fprintf(stderr, "Error: minimum block size must be %d\n", gLibpdBlockSize);
		return false;
	}
	// set hooks before calling libpd_init
	libpd_set_printhook(Bela_printHook);
	libpd_set_floathook(Bela_floatHook);
	libpd_set_messagehook(Bela_messageHook);
	libpd_set_noteonhook(pdnoteon);
	//TODO: add hooks for other midi events and generate MIDI output appropriately
	libpd_init();
	//TODO: ideally, we would analyse the ASCII of the patch file and find out which in/outs to use
	libpd_init_audio(gChannelsInUse, gChannelsInUse, context->audioSampleRate);
	gInBuf = libpd_get_sys_soundin();
	gOutBuf = libpd_get_sys_soundout();

	libpd_start_message(1); // one entry in list
	libpd_add_float(1.0f);
	libpd_finish_message("pd", "dsp");

	gBufLength = max(gLibpdBlockSize, context->audioFrames);


	// bind your receivers here
	libpd_bind("bela_digitalOut11");
	libpd_bind("bela_digitalOut12");
	libpd_bind("bela_digitalOut13");
	libpd_bind("bela_digitalOut14");
	libpd_bind("bela_digitalOut15");
	libpd_bind("bela_digitalOut16");
	libpd_bind("bela_digitalOut17");
	libpd_bind("bela_digitalOut18");
	libpd_bind("bela_digitalOut19");
	libpd_bind("bela_digitalOut20");
	libpd_bind("bela_digitalOut21");
	libpd_bind("bela_digitalOut22");
	libpd_bind("bela_digitalOut23");
	libpd_bind("bela_digitalOut24");
	libpd_bind("bela_digitalOut25");
	libpd_bind("bela_digitalOut26");
	libpd_bind("bela_setDigital");

	// open patch       [; pd open file folder(
	void* patch = libpd_openfile(file, folder);
	if(patch == NULL){
		printf("Error: file %s/%s is corrupted.\n", folder, file); 
		return false;
	}
	return true;
}

// render() is called regularly at the highest priority by the audio engine.
// Input and output are given from the audio hardware and the other
// ADCs and DACs (if available). If only audio is available, numMatrixFrames
// will be 0.

void render(BelaContext *context, void *userData)
{
	int num;
	
	
	// the safest thread-safe option to handle MIDI input is to process the MIDI buffer
	// from the audio thread.
#ifdef PARSE_MIDI
	while((num = midi.getParser()->numAvailableMessages()) > 0){
		static MidiChannelMessage message;
		message = midi.getParser()->getNextChannelMessage();
		//message.prettyPrint(); // use this to print beautified message (channel, data bytes)
		switch(message.getType()){
			case kmmNoteOn:
			{
				int noteNumber = message.getDataByte(0);
				int velocity = message.getDataByte(1);
				int channel = message.getChannel();
				libpd_noteon(channel, noteNumber, velocity);
				break;
			}
			case kmmNoteOff:
			{
				/* PureData does not seem to handle noteoff messages as per the MIDI specs,
				 * so that the noteoff velocity is ignored. Here we convert them to noteon
				 * with a velocity of 0.
				 */
				int noteNumber = message.getDataByte(0);
//				int velocity = message.getDataByte(1); // would be ignored by Pd
				int channel = message.getChannel();
				libpd_noteon(channel, noteNumber, 0);
				break;
			}
			case kmmControlChange:
			{
				int channel = message.getChannel();
				int controller = message.getDataByte(0);
				int value = message.getDataByte(1);
				libpd_controlchange(channel, controller, value);
				break;
			}
			case kmmProgramChange:
			{
				int channel = message.getChannel();
				int program = message.getDataByte(0);
				libpd_programchange(channel, program);
				break;
			}
			case kmmPolyphonicKeyPressure:
			{
				int channel = message.getChannel();
				int pitch = message.getDataByte(0);
				int value = message.getDataByte(1);
				libpd_polyaftertouch(channel, pitch, value);
				break;
			}
			case kmmChannelPressure:
			{
				int channel = message.getChannel();
				int value = message.getDataByte(0);
				libpd_aftertouch(channel, value);
				break;
			}
			case kmmPitchBend:
			{
				int channel = message.getChannel();
				int value =  ((message.getDataByte(1) << 7)| message.getDataByte(0)) - 8192;
				libpd_pitchbend(channel, value);
				break;
			}
			case kmmNone:
			case kmmAny:
				break;
		}
	}
#else
	int input;
	while((input = midi.getInput()) >= 0){
		libpd_midibyte(0, input);
	}
#endif /* PARSE_MIDI */

	static unsigned int numberOfPdBlocksToProcess = gBufLength / gLibpdBlockSize;

	for(unsigned int tick = 0; tick < numberOfPdBlocksToProcess; ++tick){
	    
	    //janMod
//	    if(++readCount >= readIntervalSamples) {
//            readCount = 0;
//            Bela_scheduleAuxiliaryTask(serialInputReadTask);
//        }
        Bela_scheduleAuxiliaryTask(serialInputReadTask);

        
		unsigned int audioFrameBase = gLibpdBlockSize * tick;
		unsigned int j;
		unsigned int k;
		float* p0;
		float* p1;
		for (j = 0, p0 = gInBuf; j < gLibpdBlockSize; j++, p0++) {
			for (k = 0, p1 = p0; k < context->audioInChannels; k++, p1 += gLibpdBlockSize) {
				*p1 = audioRead(context, audioFrameBase + j, k);
			}
		}
		// then analogs
		// this loop resamples by ZOH, as needed, using m
		if(context->analogInChannels == 8 ){ //hold the value for two frames
			for (j = 0, p0 = gInBuf; j < gLibpdBlockSize; j++, p0++) {
				for (k = 0, p1 = p0 + gLibpdBlockSize * gFirstAnalogChannel; k < gAnalogChannelsInUse; ++k, p1 += gLibpdBlockSize) {
					unsigned int analogFrame = (audioFrameBase + j) / 2;
					*p1 = analogRead(context, analogFrame, k);
				}
			}
		} else if(context->analogInChannels == 4){ //write every frame
			for (j = 0, p0 = gInBuf; j < gLibpdBlockSize; j++, p0++) {
				for (k = 0, p1 = p0 + gLibpdBlockSize * gFirstAnalogChannel; k < gAnalogChannelsInUse; ++k, p1 += gLibpdBlockSize) {
					unsigned int analogFrame = audioFrameBase + j;
					*p1 = analogRead(context, analogFrame, k);
				}
			}
		} else if(context->analogInChannels == 2){ //drop every other frame
			for (j = 0, p0 = gInBuf; j < gLibpdBlockSize; j++, p0++) {
				for (k = 0, p1 = p0 + gLibpdBlockSize * gFirstAnalogChannel; k < gAnalogChannelsInUse; ++k, p1 += gLibpdBlockSize) {
					unsigned int analogFrame = (audioFrameBase + j) * 2;
					*p1 = analogRead(context, analogFrame, k);
				}
			}
		}

		// Bela digital input
		// note: in multiple places below we assume that the number of digitals is same as number of audio
		// digital in at message-rate
		dcm.processInput(&context->digital[audioFrameBase], gLibpdBlockSize);

		// digital in at signal-rate
		for (j = 0, p0 = gInBuf; j < gLibpdBlockSize; j++, p0++) {
			unsigned int digitalFrame = audioFrameBase + j;
			for (k = 0, p1 = p0 + gLibpdBlockSize * gFirstDigitalChannel;
					k < 16; ++k, p1 += gLibpdBlockSize) {
				if(dcm.isSignalRate(k) && dcm.isInput(k)){ // only process input channels that are handled at signal rate
					*p1 = digitalRead(context, digitalFrame, k);
				}
			}
		}

		libpd_process_sys(); // process the block

		//digital out
		// digital out at signal-rate
		for (j = 0, p0 = gOutBuf; j < gLibpdBlockSize; ++j, ++p0) {
			unsigned int digitalFrame = (audioFrameBase + j);
			for (k = 0, p1 = p0  + gLibpdBlockSize * gFirstDigitalChannel;
					k < context->digitalChannels; k++, p1 += gLibpdBlockSize) {
				if(dcm.isSignalRate(k) && dcm.isOutput(k)){ // only process output channels that are handled at signal rate
					digitalWriteOnce(context, digitalFrame, k, *p1 > 0.5);
				}
			}
		}

		// digital out at message-rate
		dcm.processOutput(&context->digital[audioFrameBase], gLibpdBlockSize);

		//audio
		for (j = 0, p0 = gOutBuf; j < gLibpdBlockSize; j++, p0++) {
			for (k = 0, p1 = p0; k < context->audioOutChannels; k++, p1 += gLibpdBlockSize) {
				audioWrite(context, audioFrameBase + j, k, *p1);
			}
		}
		//scope
		for (j = 0, p0 = gOutBuf; j < gLibpdBlockSize; ++j, ++p0) {
			for (k = 0, p1 = p0  + gLibpdBlockSize * gFirstScopeChannel; k < gScopeChannelsInUse; k++, p1 += gLibpdBlockSize) {
				gScopeOut[k] = *p1;
			}
			scope.log(gScopeOut[0], gScopeOut[1], gScopeOut[2], gScopeOut[3]);
		}


		//analog
		if(context->analogOutChannels == 8){
			for (j = 0, p0 = gOutBuf; j < gLibpdBlockSize; j += 2, p0 += 2) { //write every two frames
				unsigned int analogFrame = (audioFrameBase + j) / 2;
				for (k = 0, p1 = p0 + gLibpdBlockSize * gFirstAnalogChannel; k < gAnalogChannelsInUse; k++, p1 += gLibpdBlockSize) {
					analogWriteOnce(context, analogFrame, k, *p1);
				}
			}
		} else if(context->analogOutChannels == 4){ //write every frame
			for (j = 0, p0 = gOutBuf; j < gLibpdBlockSize; ++j, ++p0) {
				unsigned int analogFrame = (audioFrameBase + j);
				for (k = 0, p1 = p0  + gLibpdBlockSize * gFirstAnalogChannel; k < gAnalogChannelsInUse; k++, p1 += gLibpdBlockSize) {
					analogWriteOnce(context, analogFrame, k, *p1);
				}
			}
		} else if(context->analogOutChannels == 2){ //write every frame twice
			for (j = 0, p0 = gOutBuf; j < gLibpdBlockSize; j++, p0++) {
				for (k = 0, p1 = p0 + gLibpdBlockSize * gFirstAnalogChannel; k < gAnalogChannelsInUse; k++, p1 += gLibpdBlockSize) {
					int analogFrame = audioFrameBase * 2 + j * 2;
					analogWriteOnce(context, analogFrame, k, *p1);
					analogWriteOnce(context, analogFrame + 1, k, *p1);
				}
			}
		}
	}
	libpd_float("arduino", (float)send_val); //janMod
}

// cleanup() is called once at the end, after the audio has stopped.
// Release any resources that were allocated in setup().

void cleanup(BelaContext *context, void *userData)
{
	delete [] gScopeOut;
    close(fd); /* Close the serial port */

}

void serialInputRead()
{
    while (read(fd, &c, 1) > 0 && newData == false) {
        rc = c;
        if (rc != endMarker) {
            receivedChars[ndx] = rc;
            ndx++;
            if (ndx >= numChars) {
                ndx = numChars - 1;
            }
        }
        else {
            receivedChars[ndx] = '\0'; // terminate the string
            newData = true;
        }
    }
    
    if (newData == true) {

//        for (i=0;i<ndx;i++) {
//            printf("%c",receivedChars[i]);
//        }
//        printf("\n");
        ndx=0;	
        newData = false;
        //libpd_float("arduino", 100);
        if (sscanf(receivedChars, "/foot %d", &send_val)) {
            printf("value: %d\n",send_val);
        }
    }
}