path: root/tools/osx/simulator-osx.c

/******************************************************************************
 
 Copyright (c) 2015, Focusrite Audio Engineering Ltd.
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 modification, are permitted provided that the following conditions are met:
 
 * Redistributions of source code must retain the above copyright notice, this
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 and/or other materials provided with the distribution.
 
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 contributors may be used to endorse or promote products derived from
 this software without specific prior written permission.
 
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 AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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#include <stdio.h>
#include "app.h"

#include <CoreMIDI/CoreMIDI.h>

#include <mach/mach_time.h>

//////////////////////////////////////////////////////////////////////////
static MIDIClientRef g_client = 0;

static MIDIPortRef g_inDevPort = 0;
static MIDIPortRef g_outDevPort = 0;

static MIDIEndpointRef g_outDevEndpoint = 0;

static MIDIEndpointRef g_outVirtualEndpoint = 0;
static MIDIEndpointRef g_inVirtualEndpoint = 0;

static const float TIMER_INTERVAL_S = 0.001; //s

// ____________________________________________________________________________
//
// Simulator "hal".  This lets you exercise your device code without having to upload
// it to the hardware, which also means you can debug it interactively.
// ____________________________________________________________________________

void hal_plot_led(u8 type, u8 index, u8 red, u8 green, u8 blue)
{
	// send this up the MIDI.  Construct sysex:
	unsigned char data[] = {0xF0, 0x00, 0x20, 0x29, 0x02, 0x10, 0x0B, index, red, green, blue, 0xF7};
	
	static const int MAX_OUTPUT_BUFFER_SIZE = 256;
	
	MIDIPacketList packetLst;
	MIDIPacket *packet = MIDIPacketListInit(&packetLst);
	MIDIPacketListAdd(&packetLst, MAX_OUTPUT_BUFFER_SIZE, packet, 0, sizeof(data), data);
	
	MIDISend(g_outDevPort, g_outDevEndpoint, &packetLst);
}

void hal_send_midi(u8 port, u8 status, u8 d1, u8 d2)
{
	if (port == DINMIDI)
	{
		// send this up the virtual "DIN" MIDI
		u8 data[] = {status, d1, d2};
		
		// MIDI needs host absolute time, NOT the proper time!
		
		uint64_t timeNow = mach_absolute_time();
		
		MIDIPacketList packetLst;
		MIDIPacket *packet = MIDIPacketListInit(&packetLst);
		MIDIPacketListAdd(&packetLst, 3, packet, timeNow, sizeof(data), data);
		
		OSStatus err = MIDIReceived(g_outVirtualEndpoint, &packetLst);
		int n=0;
	}
}

void hal_send_sysex(u8 port, const u8* data, u16 length)
{
	// as above, or just dump to console?
}

//////////////////////////////////////////////////////////////////////////
static void processPacket(const unsigned char *data, int length)
{
    // parse MIDI (very naively)
    while (length > 0)
    {
        unsigned char status = data[0];
        
        // Wipe out channel (bottom four bits)
        status &= 0xF0;
        
        if (length >= 3)
        {
            switch (status)
            {
                case NOTEON:
                case NOTEOFF:
                    app_surface_event(TYPEPAD, data[1], data[2]);
                    data += 3;
                    length -= 3;
                    break;
                    
                case CC:
                    app_surface_event(TYPEPAD, data[1], data[2]);
                    data += 3;
                    length -= 3;
                    break;
                    
                case POLYAFTERTOUCH:
                    app_aftertouch_event(data[1], data[2]);
                    data += 3;
                    length -= 3;
                    break;
                    
                default:
                	// Don't know this message, so bail
                	length--;
                	data++;
                    break;
            }
        }
        else
        {
            // We expected at least three bytes and didn't get them, so bail
            length--;
            data++;
        }
    }
}

//////////////////////////////////////////////////////////////////////////
static void processVirtualPortPacket(const unsigned char *data, int length)
{
	// parse MIDI (very naively)
	while (length > 0)
	{
		unsigned char status = data[0];
		
		// Wipe out channel (bottom four bits)
		status &= 0xF0;
		
		if (length >= 3)
		{
			switch (status)
			{
				case NOTEON:
				case NOTEOFF:
				case CC:
					app_midi_event(DINMIDI, status, data[1], data[2]);
					data += 3;
					length -= 3;
					break;
					
				default:
					// Don't know this message, so bail
					length--;
					data++;
					break;
			}
		}
		else
		{
			// We expected at least three bytes and didn't get them, so bail
			length--;
			data++;
		}
	}
}

static void readProc(const MIDIPacketList *pktlist, void *readProcRefCon, void *srcConnRefCon)
{
	// farm out the packets
	const MIDIPacket *packet = &pktlist->packet[0];
	for (int i=0; i <  pktlist->numPackets; ++i)
	{
		// process the packet - in our case, receive a surface message
		processPacket(packet->data, packet->length);
		
		// next
		packet = MIDIPacketNext(packet);
	}
}

static void virtualReadProc(const MIDIPacketList *pktlist, void *readProcRefCon, void *srcConnRefCon)
{
	// farm out the packets
	const MIDIPacket *packet = &pktlist->packet[0];
	for (int i=0; i <  pktlist->numPackets; ++i)
	{
		// process the packet - in our case, receive a surface message
		processVirtualPortPacket(packet->data, packet->length);
		
		// next
		packet = MIDIPacketNext(packet);
	}
}

static int findLaunchpadPro()
{
	// find the input hardware port
	for (ItemCount i=0; i < MIDIGetNumberOfSources(); ++i)
	{
		MIDIEndpointRef endpoint = MIDIGetSource(i);
		if (endpoint)
		{
			// get the endpoint name (always available)
			CFStringRef endpointName = NULL;
			if (noErr != MIDIObjectGetStringProperty(endpoint, kMIDIPropertyName, &endpointName))
			{
				return -1;
			}
			
			if (CFStringCompare(endpointName, CFSTR("Standalone Port"), kCFCompareCaseInsensitive) == 0)
			{
				// found it!  open the endpoint.
				if (noErr != MIDIInputPortCreate(g_client, CFSTR("In"), readProc, NULL, &g_inDevPort))
				{
					return -1;
				}
				
				
				if (noErr != MIDIPortConnectSource(g_inDevPort, endpoint, NULL))
				{
					return -1;
				}
			}
		}
	}
	
	// now find the output
	for (ItemCount i=0; i < MIDIGetNumberOfDestinations(); ++i)
	{
		MIDIEndpointRef endpoint = MIDIGetDestination(i);
		if (endpoint)
		{
			// get the endpoint name (always available)
			CFStringRef endpointName = NULL;
			if (noErr != MIDIObjectGetStringProperty(endpoint, kMIDIPropertyName, &endpointName))
			{
				return -1;
			}
			
			if (CFStringCompare(endpointName, CFSTR("Standalone Port"), kCFCompareCaseInsensitive) == 0)
			{
				// found it!  open the endpoint.
				if (noErr != MIDIOutputPortCreate(g_client, CFSTR("Out"), &g_outDevPort))
				{
					return -1;
				}
				g_outDevEndpoint = endpoint;
			}
		}
	}
	
	return !(g_inDevPort && g_outDevPort);
}

static int openVirtualPorts()
{
	// create the output port
	CFStringRef name =  CFStringCreateWithCString(NULL, "LPP Simulator Out", kCFStringEncodingMacRoman);
	OSStatus result = MIDISourceCreate(g_client, name, &g_outVirtualEndpoint);
	CFRelease(name);
	
	if (noErr != result)
	{
		return -1;
	}
	
	MIDIObjectSetIntegerProperty(g_outVirtualEndpoint,  kMIDIPropertyUniqueID, 12325436);
	
	// create the input port
	name =  CFStringCreateWithCString(NULL, "LPP Simulator In", kCFStringEncodingMacRoman);
	result = MIDIDestinationCreate(g_client, name, virtualReadProc, NULL, &g_inVirtualEndpoint);
	CFRelease(name);
	
	if (noErr != result)
	{
		return -1;
	}
	MIDIObjectSetIntegerProperty(g_outVirtualEndpoint,  kMIDIPropertyUniqueID, 34534563);
	
	return 0;
}

// ____________________________________________________________________________

static void timerCallback(CFRunLoopTimerRef timer, void * info)
{
    app_timer_event();
    CFRunLoopSourceSignal(info);
}

// ____________________________________________________________________________

int main(int argc, char * argv[])
{
	// open MIDI ports and wire them up
	CFStringRef strName = CFStringCreateWithCString(NULL, "Launchpad Pro Simulator", kCFStringEncodingASCII);
	if (noErr == MIDIClientCreate(strName, NULL, NULL, &g_client))
	{
		CFRelease(strName);
	}
	else
	{
		// failed to open MIDI client
		return -1;
	}
	
	if (findLaunchpadPro())
	{
		// no Launchpad Pro connected
		return -2;
	}
	
	if (openVirtualPorts())
	{
		// no Launchpad Pro connected
		return -3;
	}

	// now start things up
	app_init();
	
    // start a timer loop
    CFRunLoopSourceContext source_context;
    bzero(&source_context, sizeof(source_context));
    CFRunLoopSourceRef source = CFRunLoopSourceCreate(NULL, 0, & source_context);
    CFRunLoopAddSource(CFRunLoopGetCurrent(), source, kCFRunLoopCommonModes);
    
    CFRunLoopTimerContext timer_context;
    bzero(&timer_context, sizeof(timer_context));
    timer_context.info = source;
    CFRunLoopTimerRef timer = CFRunLoopTimerCreate(NULL, CFAbsoluteTimeGetCurrent(), TIMER_INTERVAL_S, 0, 0, timerCallback, &timer_context);
    CFRunLoopAddTimer(CFRunLoopGetCurrent(), timer, kCFRunLoopCommonModes);
    
    CFRunLoopRun();
    
    return EXIT_SUCCESS;
}