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/*
Copyright (C) 2009 Grame
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include "JackCoreMidiDriver.h"
#include "JackGraphManager.h"
#include "JackServer.h"
#include "JackEngineControl.h"
#include "JackDriverLoader.h"
#include <mach/mach_time.h>
#include <assert.h>
#include <iostream>
#include <sstream>
#include <string>
namespace Jack
{
static MIDITimeStamp MIDIGetCurrentHostTime()
{
return mach_absolute_time();
}
void JackCoreMidiDriver::ReadProcAux(const MIDIPacketList *pktlist, jack_ringbuffer_t* ringbuffer)
{
// Write the number of packets
size_t size = jack_ringbuffer_write_space(ringbuffer);
if (size < sizeof(UInt32)) {
jack_error("ReadProc : ring buffer is full, skip events...");
return;
}
jack_ringbuffer_write(ringbuffer, (char*)&pktlist->numPackets, sizeof(UInt32));
for (unsigned int i = 0; i < pktlist->numPackets; ++i) {
MIDIPacket *packet = (MIDIPacket *)pktlist->packet;
// TODO : use timestamp
// Check available size first..
size = jack_ringbuffer_write_space(ringbuffer);
if (size < (sizeof(UInt16) + packet->length)) {
jack_error("ReadProc : ring buffer is full, skip events...");
return;
}
// Write length of each packet first
jack_ringbuffer_write(ringbuffer, (char*)&packet->length, sizeof(UInt16));
// Write event actual data
jack_ringbuffer_write(ringbuffer, (char*)packet->data, packet->length);
packet = MIDIPacketNext(packet);
}
}
void JackCoreMidiDriver::ReadProc(const MIDIPacketList *pktlist, void *refCon, void *connRefCon)
{
jack_ringbuffer_t* ringbuffer = (jack_ringbuffer_t*)connRefCon;
ReadProcAux(pktlist, ringbuffer);
}
void JackCoreMidiDriver::ReadVirtualProc(const MIDIPacketList *pktlist, void *refCon, void *connRefCon)
{
jack_ringbuffer_t* ringbuffer = (jack_ringbuffer_t*)refCon;
ReadProcAux(pktlist, ringbuffer);
}
void JackCoreMidiDriver::NotifyProc(const MIDINotification *message, void *refCon)
{
jack_log("NotifyProc %d", message->messageID);
}
JackCoreMidiDriver::JackCoreMidiDriver(const char* name, const char* alias, JackLockedEngine* engine, JackSynchro* table)
: JackMidiDriver(name, alias, engine, table), fMidiClient(NULL), fInputPort(NULL), fOutputPort(NULL), fRealCaptureChannels(0), fRealPlaybackChannels(0)
{}
JackCoreMidiDriver::~JackCoreMidiDriver()
{}
int JackCoreMidiDriver::Open(bool capturing,
bool playing,
int inchannels,
int outchannels,
bool monitor,
const char* capture_driver_name,
const char* playback_driver_name,
jack_nframes_t capture_latency,
jack_nframes_t playback_latency)
{
OSStatus err;
CFStringRef coutputStr;
std::string str;
// Get real input/output number
fRealCaptureChannels = MIDIGetNumberOfSources();
fRealPlaybackChannels = MIDIGetNumberOfDestinations();
// Generic JackMidiDriver Open
if (JackMidiDriver::Open(capturing, playing, inchannels + fRealCaptureChannels, outchannels + fRealPlaybackChannels, monitor, capture_driver_name, playback_driver_name, capture_latency, playback_latency) != 0)
return -1;
coutputStr = CFStringCreateWithCString(0, "JackMidi", CFStringGetSystemEncoding());
err = MIDIClientCreate(coutputStr, NotifyProc, this, &fMidiClient);
CFRelease(coutputStr);
if (!fMidiClient) {
jack_error("Cannot create CoreMidi client");
goto error;
}
err = MIDIInputPortCreate(fMidiClient, CFSTR("Input port"), ReadProc, this, &fInputPort);
if (!fInputPort) {
jack_error("Cannot open CoreMidi in port\n");
goto error;
}
err = MIDIOutputPortCreate(fMidiClient, CFSTR("Output port"), &fOutputPort);
if (!fOutputPort) {
jack_error("Cannot open CoreMidi out port\n");
goto error;
}
fMidiDestination = new MIDIEndpointRef[inchannels + fRealCaptureChannels];
assert(fMidiDestination);
// Virtual input
for (int i = 0; i < inchannels; i++) {
std::stringstream num;
num << i;
str = "JackMidi" + num.str();
coutputStr = CFStringCreateWithCString(0, str.c_str(), CFStringGetSystemEncoding());
err = MIDIDestinationCreate(fMidiClient, coutputStr, ReadVirtualProc, fRingBuffer[i], &fMidiDestination[i]);
CFRelease(coutputStr);
if (!fMidiDestination[i]) {
jack_error("Cannot create CoreMidi destination");
goto error;
}
}
// Real input
for (int i = 0; i < fRealCaptureChannels; i++) {
fMidiDestination[i + inchannels] = MIDIGetSource(i);
MIDIPortConnectSource(fInputPort, fMidiDestination[i + inchannels], fRingBuffer[i + inchannels]);
}
fMidiSource = new MIDIEndpointRef[outchannels + fRealPlaybackChannels];
assert(fMidiSource);
// Virtual output
for (int i = 0; i < outchannels; i++) {
std::stringstream num;
num << i;
str = "JackMidi" + num.str();
coutputStr = CFStringCreateWithCString(0, str.c_str(), CFStringGetSystemEncoding());
err = MIDISourceCreate(fMidiClient, coutputStr, &fMidiSource[i]);
CFRelease(coutputStr);
if (!fMidiSource[i]) {
jack_error("Cannot create CoreMidi source");
goto error;
}
}
// Real output
for (int i = 0; i < fRealPlaybackChannels; i++) {
fMidiSource[i + outchannels] = MIDIGetDestination(i);
}
return 0;
error:
Close();
return -1;
}
int JackCoreMidiDriver::Close()
{
// Generic midi driver close
int res = JackMidiDriver::Close();
if (fInputPort)
MIDIPortDispose(fInputPort);
if (fOutputPort)
MIDIPortDispose(fOutputPort);
// Only dispose "virtual" endpoints
for (int i = 0; i < fCaptureChannels - fRealCaptureChannels; i++) {
if (fMidiDestination)
MIDIEndpointDispose(fMidiDestination[i]);
}
delete[] fMidiDestination;
// Only dispose "virtual" endpoints
for (int i = 0; i < fPlaybackChannels - fRealPlaybackChannels; i++) {
if (fMidiSource[i])
MIDIEndpointDispose(fMidiSource[i]);
}
delete[] fMidiSource;
if (fMidiClient)
MIDIClientDispose(fMidiClient);
return res;
}
int JackCoreMidiDriver::Attach()
{
OSStatus err;
JackPort* port;
CFStringRef pname;
jack_port_id_t port_index;
char name[JACK_CLIENT_NAME_SIZE + JACK_PORT_NAME_SIZE];
char endpoint_name[JACK_CLIENT_NAME_SIZE + JACK_PORT_NAME_SIZE];
char alias[JACK_CLIENT_NAME_SIZE + JACK_PORT_NAME_SIZE];
int i;
jack_log("JackCoreMidiDriver::Attach fBufferSize = %ld fSampleRate = %ld", fEngineControl->fBufferSize, fEngineControl->fSampleRate);
for (i = 0; i < fCaptureChannels; i++) {
err = MIDIObjectGetStringProperty(fMidiDestination[i], kMIDIPropertyName, &pname);
if (err == noErr) {
CFStringGetCString(pname, endpoint_name, sizeof(endpoint_name), 0);
CFRelease(pname);
snprintf(alias, sizeof(alias) - 1, "%s:%s:out%d", fAliasName, endpoint_name, i + 1);
} else {
snprintf(alias, sizeof(alias) - 1, "%s:%s:out%d", fAliasName, fCaptureDriverName, i + 1);
}
snprintf(name, sizeof(name) - 1, "%s:capture_%d", fClientControl.fName, i + 1);
if ((port_index = fGraphManager->AllocatePort(fClientControl.fRefNum, name, JACK_DEFAULT_MIDI_TYPE, CaptureDriverFlags, fEngineControl->fBufferSize)) == NO_PORT) {
jack_error("driver: cannot register port for %s", name);
return -1;
}
port = fGraphManager->GetPort(port_index);
port->SetAlias(alias);
fCapturePortList[i] = port_index;
jack_log("JackCoreMidiDriver::Attach fCapturePortList[i] port_index = %ld", port_index);
}
for (i = 0; i < fPlaybackChannels; i++) {
err = MIDIObjectGetStringProperty(fMidiSource[i], kMIDIPropertyName, &pname);
if (err == noErr) {
CFStringGetCString(pname, endpoint_name, sizeof(endpoint_name), 0);
CFRelease(pname);
snprintf(alias, sizeof(alias) - 1, "%s:%s:in%d", fAliasName, endpoint_name, i + 1);
} else {
snprintf(alias, sizeof(alias) - 1, "%s:%s:in%d", fAliasName, fPlaybackDriverName, i + 1);
}
snprintf(name, sizeof(name) - 1, "%s:playback_%d", fClientControl.fName, i + 1);
if ((port_index = fGraphManager->AllocatePort(fClientControl.fRefNum, name, JACK_DEFAULT_MIDI_TYPE, PlaybackDriverFlags, fEngineControl->fBufferSize)) == NO_PORT) {
jack_error("driver: cannot register port for %s", name);
return -1;
}
port = fGraphManager->GetPort(port_index);
port->SetAlias(alias);
fPlaybackPortList[i] = port_index;
jack_log("JackCoreMidiDriver::Attach fPlaybackPortList[i] port_index = %ld", port_index);
}
return 0;
}
int JackCoreMidiDriver::Read()
{
for (int chan = 0; chan < fCaptureChannels; chan++) {
if (fGraphManager->GetConnectionsNum(fCapturePortList[chan]) > 0) {
// Get JACK port
JackMidiBuffer* midi_buffer = GetInputBuffer(chan);
if (jack_ringbuffer_read_space(fRingBuffer[chan]) == 0) {
// Reset buffer
midi_buffer->Reset(midi_buffer->nframes);
} else {
while (jack_ringbuffer_read_space(fRingBuffer[chan]) > 0) {
// Read event number
int ev_count = 0;
jack_ringbuffer_read(fRingBuffer[chan], (char*)&ev_count, sizeof(int));
for (int j = 0; j < ev_count; j++) {
// Read event length
UInt16 event_len;
jack_ringbuffer_read(fRingBuffer[chan], (char*)&event_len, sizeof(UInt16));
// Read event actual data
jack_midi_data_t* dest = midi_buffer->ReserveEvent(0, event_len);
jack_ringbuffer_read(fRingBuffer[chan], (char*)dest, event_len);
}
}
}
} else {
// Consume ring buffer
jack_ringbuffer_read_advance(fRingBuffer[chan], jack_ringbuffer_read_space(fRingBuffer[chan]));
}
}
return 0;
}
int JackCoreMidiDriver::Write()
{
MIDIPacketList* pktlist = (MIDIPacketList*)fMIDIBuffer;
for (int chan = 0; chan < fPlaybackChannels; chan++) {
if (fGraphManager->GetConnectionsNum(fPlaybackPortList[chan]) > 0) {
MIDIPacket* packet = MIDIPacketListInit(pktlist);
JackMidiBuffer* midi_buffer = GetOutputBuffer(chan);
// TODO : use timestamp
for (unsigned int j = 0; j < midi_buffer->event_count; j++) {
JackMidiEvent* ev = &midi_buffer->events[j];
packet = MIDIPacketListAdd(pktlist, sizeof(fMIDIBuffer), packet, MIDIGetCurrentHostTime(), ev->size, ev->GetData(midi_buffer));
}
if (packet) {
if (chan < fPlaybackChannels - fRealPlaybackChannels) {
OSStatus err = MIDIReceived(fMidiSource[chan], pktlist);
if (err != noErr)
jack_error("MIDIReceived error");
} else {
OSStatus err = MIDISend(fOutputPort, fMidiSource[chan], pktlist);
if (err != noErr)
jack_error("MIDISend error");
}
}
}
}
return 0;
}
} // end of namespace
#ifdef __cplusplus
extern "C"
{
#endif
SERVER_EXPORT jack_driver_desc_t * driver_get_descriptor()
{
jack_driver_desc_t * desc;
unsigned int i;
desc = (jack_driver_desc_t*)calloc (1, sizeof (jack_driver_desc_t));
strcpy(desc->name, "coremidi"); // size MUST be less then JACK_DRIVER_NAME_MAX + 1
strcpy(desc->desc, "Apple CoreMIDI API based MIDI backend"); // size MUST be less then JACK_DRIVER_PARAM_DESC + 1
desc->nparams = 2;
desc->params = (jack_driver_param_desc_t*)calloc (desc->nparams, sizeof (jack_driver_param_desc_t));
i = 0;
strcpy(desc->params[i].name, "inchannels");
desc->params[i].character = 'i';
desc->params[i].type = JackDriverParamInt;
desc->params[i].value.ui = 0;
strcpy(desc->params[i].short_desc, "CoreMIDI virtual bus");
strcpy(desc->params[i].long_desc, desc->params[i].short_desc);
i++;
strcpy(desc->params[i].name, "outchannels");
desc->params[i].character = 'o';
desc->params[i].type = JackDriverParamInt;
desc->params[i].value.ui = 0;
strcpy(desc->params[i].short_desc, "CoreMIDI virtual bus");
strcpy(desc->params[i].long_desc, desc->params[i].short_desc);
return desc;
}
SERVER_EXPORT Jack::JackDriverClientInterface* driver_initialize(Jack::JackLockedEngine* engine, Jack::JackSynchro* table, const JSList* params)
{
const JSList * node;
const jack_driver_param_t * param;
int virtual_in = 0;
int virtual_out = 0;
for (node = params; node; node = jack_slist_next (node)) {
param = (const jack_driver_param_t *) node->data;
switch (param->character) {
case 'i':
virtual_in = param->value.ui;
break;
case 'o':
virtual_out = param->value.ui;
break;
}
}
Jack::JackDriverClientInterface* driver = new Jack::JackCoreMidiDriver("system_midi", "coremidi", engine, table);
if (driver->Open(1, 1, virtual_in, virtual_out, false, "in", "out", 0, 0) == 0) {
return driver;
} else {
delete driver;
return NULL;
}
}
#ifdef __cplusplus
}
#endif
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