diff options
Diffstat (limited to 'libs/backends/wavesaudio/portmidi/src/pm_mac/pmmacosxcm.c')
| -rw-r--r-- | libs/backends/wavesaudio/portmidi/src/pm_mac/pmmacosxcm.c | 1010 |
1 files changed, 1010 insertions, 0 deletions
diff --git a/libs/backends/wavesaudio/portmidi/src/pm_mac/pmmacosxcm.c b/libs/backends/wavesaudio/portmidi/src/pm_mac/pmmacosxcm.c new file mode 100644 index 0000000000..78513573d4 --- /dev/null +++ b/libs/backends/wavesaudio/portmidi/src/pm_mac/pmmacosxcm.c @@ -0,0 +1,1010 @@ +/* + * Platform interface to the MacOS X CoreMIDI framework + * + * Jon Parise <jparise at cmu.edu> + * and subsequent work by Andrew Zeldis and Zico Kolter + * and Roger B. Dannenberg + * + * $Id: pmmacosx.c,v 1.17 2002/01/27 02:40:40 jon Exp $ + */ + +/* Notes: + since the input and output streams are represented by MIDIEndpointRef + values and almost no other state, we store the MIDIEndpointRef on + descriptors[midi->device_id].descriptor. The only other state we need + is for errors: we need to know if there is an error and if so, what is + the error text. We use a structure with two kinds of + host error: "error" and "callback_error". That way, asynchronous callbacks + do not interfere with other error information. + + OS X does not seem to have an error-code-to-text function, so we will + just use text messages instead of error codes. + */ + +#include <stdlib.h> + +//#define CM_DEBUG 1 + +#include "portmidi.h" +#include "pmutil.h" +#include "pminternal.h" +#include "porttime.h" +#include "pmmac.h" +#include "pmmacosxcm.h" + +#include <stdio.h> +#include <string.h> + +#include <CoreServices/CoreServices.h> +#include <CoreMIDI/MIDIServices.h> +#include <CoreAudio/HostTime.h> +#include <unistd.h> + +#define PACKET_BUFFER_SIZE 1024 +/* maximum overall data rate (OS X limit is 15000 bytes/second) */ +#define MAX_BYTES_PER_S 14000 + +/* Apple reports that packets are dropped when the MIDI bytes/sec + exceeds 15000. This is computed by "tracking the number of MIDI + bytes scheduled into 1-second buckets over the last six seconds + and averaging these counts." + + This is apparently based on timestamps, not on real time, so + we have to avoid constructing packets that schedule high speed + output even if the actual writes are delayed (which was my first + solution). + + The LIMIT_RATE symbol, if defined, enables code to modify + timestamps as follows: + After each packet is formed, the next allowable timestamp is + computed as this_packet_time + this_packet_len * delay_per_byte + + This is the minimum timestamp allowed in the next packet. + + Note that this distorts accurate timestamps somewhat. + */ +#define LIMIT_RATE 1 + +#define SYSEX_BUFFER_SIZE 128 + +#define VERBOSE_ON 1 +#define VERBOSE if (VERBOSE_ON) + +#define MIDI_SYSEX 0xf0 +#define MIDI_EOX 0xf7 +#define MIDI_STATUS_MASK 0x80 + +// "Ref"s are pointers on 32-bit machines and ints on 64 bit machines +// NULL_REF is our representation of either 0 or NULL +#ifdef __LP64__ +#define NULL_REF 0 +#else +#define NULL_REF NULL +#endif + +static MIDIClientRef client = NULL_REF; /* Client handle to the MIDI server */ +static MIDIPortRef portIn = NULL_REF; /* Input port handle */ +static MIDIPortRef portOut = NULL_REF; /* Output port handle */ + +extern pm_fns_node pm_macosx_in_dictionary; +extern pm_fns_node pm_macosx_out_dictionary; + +typedef struct midi_macosxcm_struct { + PmTimestamp sync_time; /* when did we last determine delta? */ + UInt64 delta; /* difference between stream time and real time in ns */ + UInt64 last_time; /* last output time in host units*/ + int first_message; /* tells midi_write to sychronize timestamps */ + int sysex_mode; /* middle of sending sysex */ + uint32_t sysex_word; /* accumulate data when receiving sysex */ + uint32_t sysex_byte_count; /* count how many received */ + char error[PM_HOST_ERROR_MSG_LEN]; + char callback_error[PM_HOST_ERROR_MSG_LEN]; + Byte packetBuffer[PACKET_BUFFER_SIZE]; + MIDIPacketList *packetList; /* a pointer to packetBuffer */ + MIDIPacket *packet; + Byte sysex_buffer[SYSEX_BUFFER_SIZE]; /* temp storage for sysex data */ + MIDITimeStamp sysex_timestamp; /* timestamp to use with sysex data */ + /* allow for running status (is running status possible here? -rbd): -cpr */ + unsigned char last_command; + int32_t last_msg_length; + /* limit midi data rate (a CoreMidi requirement): */ + UInt64 min_next_time; /* when can the next send take place? */ + int byte_count; /* how many bytes in the next packet list? */ + Float64 us_per_host_tick; /* host clock frequency, units of min_next_time */ + UInt64 host_ticks_per_byte; /* host clock units per byte at maximum rate */ +} midi_macosxcm_node, *midi_macosxcm_type; + +/* private function declarations */ +MIDITimeStamp timestamp_pm_to_cm(PmTimestamp timestamp); +PmTimestamp timestamp_cm_to_pm(MIDITimeStamp timestamp); + +char* cm_get_full_endpoint_name(MIDIEndpointRef endpoint); + + +static int +midi_length(int32_t msg) +{ + int status, high, low; + static int high_lengths[] = { + 1, 1, 1, 1, 1, 1, 1, 1, /* 0x00 through 0x70 */ + 3, 3, 3, 3, 2, 2, 3, 1 /* 0x80 through 0xf0 */ + }; + static int low_lengths[] = { + 1, 2, 3, 2, 1, 1, 1, 1, /* 0xf0 through 0xf8 */ + 1, 1, 1, 1, 1, 1, 1, 1 /* 0xf9 through 0xff */ + }; + + status = msg & 0xFF; + high = status >> 4; + low = status & 15; + + return (high != 0xF) ? high_lengths[high] : low_lengths[low]; +} + +static PmTimestamp midi_synchronize(PmInternal *midi) +{ + midi_macosxcm_type m = (midi_macosxcm_type) midi->descriptor; + UInt64 pm_stream_time_2 = + AudioConvertHostTimeToNanos(AudioGetCurrentHostTime()); + PmTimestamp real_time; + UInt64 pm_stream_time; + /* if latency is zero and this is an output, there is no + time reference and midi_synchronize should never be called */ + assert(midi->time_proc); + assert(!(midi->write_flag && midi->latency == 0)); + do { + /* read real_time between two reads of stream time */ + pm_stream_time = pm_stream_time_2; + real_time = (*midi->time_proc)(midi->time_info); + pm_stream_time_2 = AudioConvertHostTimeToNanos(AudioGetCurrentHostTime()); + /* repeat if more than 0.5 ms has elapsed */ + } while (pm_stream_time_2 > pm_stream_time + 500000); + m->delta = pm_stream_time - ((UInt64) real_time * (UInt64) 1000000); + m->sync_time = real_time; + return real_time; +} + + +static void +process_packet(MIDIPacket *packet, PmEvent *event, + PmInternal *midi, midi_macosxcm_type m) +{ + /* handle a packet of MIDI messages from CoreMIDI */ + /* there may be multiple short messages in one packet (!) */ + unsigned int remaining_length = packet->length; + unsigned char *cur_packet_data = packet->data; + while (remaining_length > 0) { + if (cur_packet_data[0] == MIDI_SYSEX || + /* are we in the middle of a sysex message? */ + (m->last_command == 0 && + !(cur_packet_data[0] & MIDI_STATUS_MASK))) { + m->last_command = 0; /* no running status */ + unsigned int amt = pm_read_bytes(midi, cur_packet_data, + remaining_length, + event->timestamp); + remaining_length -= amt; + cur_packet_data += amt; + } else if (cur_packet_data[0] == MIDI_EOX) { + /* this should never happen, because pm_read_bytes should + * get and read all EOX bytes*/ + midi->sysex_in_progress = FALSE; + m->last_command = 0; + } else if (cur_packet_data[0] & MIDI_STATUS_MASK) { + /* compute the length of the next (short) msg in packet */ + unsigned int cur_message_length = midi_length(cur_packet_data[0]); + if (cur_message_length > remaining_length) { +#ifdef DEBUG + printf("PortMidi debug msg: not enough data"); +#endif + /* since there's no more data, we're done */ + return; + } + m->last_msg_length = cur_message_length; + m->last_command = cur_packet_data[0]; + switch (cur_message_length) { + case 1: + event->message = Pm_Message(cur_packet_data[0], 0, 0); + break; + case 2: + event->message = Pm_Message(cur_packet_data[0], + cur_packet_data[1], 0); + break; + case 3: + event->message = Pm_Message(cur_packet_data[0], + cur_packet_data[1], + cur_packet_data[2]); + break; + default: + /* PortMIDI internal error; should never happen */ + assert(cur_message_length == 1); + return; /* give up on packet if continued after assert */ + } + pm_read_short(midi, event); + remaining_length -= m->last_msg_length; + cur_packet_data += m->last_msg_length; + } else if (m->last_msg_length > remaining_length + 1) { + /* we have running status, but not enough data */ +#ifdef DEBUG + printf("PortMidi debug msg: not enough data in CoreMIDI packet"); +#endif + /* since there's no more data, we're done */ + return; + } else { /* output message using running status */ + switch (m->last_msg_length) { + case 1: + event->message = Pm_Message(m->last_command, 0, 0); + break; + case 2: + event->message = Pm_Message(m->last_command, + cur_packet_data[0], 0); + break; + case 3: + event->message = Pm_Message(m->last_command, + cur_packet_data[0], + cur_packet_data[1]); + break; + default: + /* last_msg_length is invalid -- internal PortMIDI error */ + assert(m->last_msg_length == 1); + } + pm_read_short(midi, event); + remaining_length -= (m->last_msg_length - 1); + cur_packet_data += (m->last_msg_length - 1); + } + } +} + + + +/* called when MIDI packets are received */ +static void +readProc(const MIDIPacketList *newPackets, void *refCon, void *connRefCon) +{ + PmInternal *midi; + midi_macosxcm_type m; + PmEvent event; + MIDIPacket *packet; + unsigned int packetIndex; + uint32_t now; + unsigned int status; + +#ifdef CM_DEBUG + printf("readProc: numPackets %d: ", newPackets->numPackets); +#endif + + /* Retrieve the context for this connection */ + midi = (PmInternal *) connRefCon; + m = (midi_macosxcm_type) midi->descriptor; + assert(m); + + /* synchronize time references every 100ms */ + now = (*midi->time_proc)(midi->time_info); + if (m->first_message || m->sync_time + 100 /*ms*/ < now) { + /* time to resync */ + now = midi_synchronize(midi); + m->first_message = FALSE; + } + + packet = (MIDIPacket *) &newPackets->packet[0]; + /* printf("readproc packet status %x length %d\n", packet->data[0], + packet->length); */ + for (packetIndex = 0; packetIndex < newPackets->numPackets; packetIndex++) { + /* Set the timestamp and dispatch this message */ + event.timestamp = (PmTimestamp) /* explicit conversion */ ( + (AudioConvertHostTimeToNanos(packet->timeStamp) - m->delta) / + (UInt64) 1000000); + status = packet->data[0]; + /* process packet as sysex data if it begins with MIDI_SYSEX, or + MIDI_EOX or non-status byte with no running status */ +#ifdef CM_DEBUG + printf(" %d", packet->length); +#endif + if (status == MIDI_SYSEX || status == MIDI_EOX || + ((!(status & MIDI_STATUS_MASK)) && !m->last_command)) { + /* previously was: !(status & MIDI_STATUS_MASK)) { + * but this could mistake running status for sysex data + */ + /* reset running status data -cpr */ + m->last_command = 0; + m->last_msg_length = 0; + /* printf("sysex packet length: %d\n", packet->length); */ + pm_read_bytes(midi, packet->data, packet->length, event.timestamp); + } else { + process_packet(packet, &event, midi, m); + } + packet = MIDIPacketNext(packet); + } +#ifdef CM_DEBUG + printf("\n"); +#endif +} + +static PmError +midi_in_open(PmInternal *midi, void *driverInfo) +{ + MIDIEndpointRef endpoint; + midi_macosxcm_type m; + OSStatus macHostError; + + /* insure that we have a time_proc for timing */ + if (midi->time_proc == NULL) { + if (!Pt_Started()) + Pt_Start(1, 0, 0); + /* time_get does not take a parameter, so coerce */ + midi->time_proc = (PmTimeProcPtr) Pt_Time; + } + endpoint = (MIDIEndpointRef) (long) descriptors[midi->device_id].descriptor; + if (endpoint == NULL_REF) { + return pmInvalidDeviceId; + } + + m = (midi_macosxcm_type) pm_alloc(sizeof(midi_macosxcm_node)); /* create */ + midi->descriptor = m; + if (!m) { + return pmInsufficientMemory; + } + m->error[0] = 0; + m->callback_error[0] = 0; + m->sync_time = 0; + m->delta = 0; + m->last_time = 0; + m->first_message = TRUE; + m->sysex_mode = FALSE; + m->sysex_word = 0; + m->sysex_byte_count = 0; + m->packetList = NULL; + m->packet = NULL; + m->last_command = 0; + m->last_msg_length = 0; + + macHostError = MIDIPortConnectSource(portIn, endpoint, midi); + if (macHostError != noErr) { + pm_hosterror = macHostError; + sprintf(pm_hosterror_text, + "Host error %ld: MIDIPortConnectSource() in midi_in_open()", + (long) macHostError); + midi->descriptor = NULL; + pm_free(m); + return pmHostError; + } + + return pmNoError; +} + +static PmError +midi_in_close(PmInternal *midi) +{ + MIDIEndpointRef endpoint; + OSStatus macHostError; + PmError err = pmNoError; + + midi_macosxcm_type m = (midi_macosxcm_type) midi->descriptor; + + if (!m) return pmBadPtr; + + endpoint = (MIDIEndpointRef) (long) descriptors[midi->device_id].descriptor; + if (endpoint == NULL_REF) { + pm_hosterror = pmBadPtr; + } + + /* shut off the incoming messages before freeing data structures */ + macHostError = MIDIPortDisconnectSource(portIn, endpoint); + if (macHostError != noErr) { + pm_hosterror = macHostError; + sprintf(pm_hosterror_text, + "Host error %ld: MIDIPortDisconnectSource() in midi_in_close()", + (long) macHostError); + err = pmHostError; + } + + midi->descriptor = NULL; + pm_free(midi->descriptor); + + return err; +} + + +static PmError +midi_out_open(PmInternal *midi, void *driverInfo) +{ + midi_macosxcm_type m; + + m = (midi_macosxcm_type) pm_alloc(sizeof(midi_macosxcm_node)); /* create */ + midi->descriptor = m; + if (!m) { + return pmInsufficientMemory; + } + m->error[0] = 0; + m->callback_error[0] = 0; + m->sync_time = 0; + m->delta = 0; + m->last_time = 0; + m->first_message = TRUE; + m->sysex_mode = FALSE; + m->sysex_word = 0; + m->sysex_byte_count = 0; + m->packetList = (MIDIPacketList *) m->packetBuffer; + m->packet = NULL; + m->last_command = 0; + m->last_msg_length = 0; + m->min_next_time = 0; + m->byte_count = 0; + m->us_per_host_tick = 1000000.0 / AudioGetHostClockFrequency(); + m->host_ticks_per_byte = (UInt64) (1000000.0 / + (m->us_per_host_tick * MAX_BYTES_PER_S)); + return pmNoError; +} + + +static PmError +midi_out_close(PmInternal *midi) +{ + midi_macosxcm_type m = (midi_macosxcm_type) midi->descriptor; + if (!m) return pmBadPtr; + + midi->descriptor = NULL; + pm_free(midi->descriptor); + + return pmNoError; +} + +static PmError +midi_abort(PmInternal *midi) +{ + PmError err = pmNoError; + OSStatus macHostError; + MIDIEndpointRef endpoint = + (MIDIEndpointRef) (long) descriptors[midi->device_id].descriptor; + macHostError = MIDIFlushOutput(endpoint); + if (macHostError != noErr) { + pm_hosterror = macHostError; + sprintf(pm_hosterror_text, + "Host error %ld: MIDIFlushOutput()", (long) macHostError); + err = pmHostError; + } + return err; +} + + +static PmError +midi_write_flush(PmInternal *midi, PmTimestamp timestamp) +{ + OSStatus macHostError; + midi_macosxcm_type m = (midi_macosxcm_type) midi->descriptor; + MIDIEndpointRef endpoint = + (MIDIEndpointRef) (long) descriptors[midi->device_id].descriptor; + assert(m); + assert(endpoint); + if (m->packet != NULL) { + /* out of space, send the buffer and start refilling it */ + /* before we can send, maybe delay to limit data rate. OS X allows + * 15KB/s. */ + UInt64 now = AudioGetCurrentHostTime(); + if (now < m->min_next_time) { + usleep((useconds_t) + ((m->min_next_time - now) * m->us_per_host_tick)); + } + macHostError = MIDISend(portOut, endpoint, m->packetList); + m->packet = NULL; /* indicate no data in packetList now */ + m->min_next_time = now + m->byte_count * m->host_ticks_per_byte; + m->byte_count = 0; + if (macHostError != noErr) goto send_packet_error; + } + return pmNoError; + +send_packet_error: + pm_hosterror = macHostError; + sprintf(pm_hosterror_text, + "Host error %ld: MIDISend() in midi_write()", + (long) macHostError); + return pmHostError; + +} + + +static PmError +send_packet(PmInternal *midi, Byte *message, unsigned int messageLength, + MIDITimeStamp timestamp) +{ + PmError err; + midi_macosxcm_type m = (midi_macosxcm_type) midi->descriptor; + assert(m); + + /* printf("add %d to packet %p len %d\n", message[0], m->packet, messageLength); */ + m->packet = MIDIPacketListAdd(m->packetList, sizeof(m->packetBuffer), + m->packet, timestamp, messageLength, + message); + m->byte_count += messageLength; + if (m->packet == NULL) { + /* out of space, send the buffer and start refilling it */ + /* make midi->packet non-null to fool midi_write_flush into sending */ + m->packet = (MIDIPacket *) 4; + /* timestamp is 0 because midi_write_flush ignores timestamp since + * timestamps are already in packets. The timestamp parameter is here + * because other API's need it. midi_write_flush can be called + * from system-independent code that must be cross-API. + */ + if ((err = midi_write_flush(midi, 0)) != pmNoError) return err; + m->packet = MIDIPacketListInit(m->packetList); + assert(m->packet); /* if this fails, it's a programming error */ + m->packet = MIDIPacketListAdd(m->packetList, sizeof(m->packetBuffer), + m->packet, timestamp, messageLength, + message); + assert(m->packet); /* can't run out of space on first message */ + } + return pmNoError; +} + + +static PmError +midi_write_short(PmInternal *midi, PmEvent *event) +{ + PmTimestamp when = event->timestamp; + PmMessage what = event->message; + MIDITimeStamp timestamp; + UInt64 when_ns; + midi_macosxcm_type m = (midi_macosxcm_type) midi->descriptor; + Byte message[4]; + unsigned int messageLength; + + if (m->packet == NULL) { + m->packet = MIDIPacketListInit(m->packetList); + /* this can never fail, right? failure would indicate something + unrecoverable */ + assert(m->packet); + } + + /* compute timestamp */ + if (when == 0) when = midi->now; + /* if latency == 0, midi->now is not valid. We will just set it to zero */ + if (midi->latency == 0) when = 0; + when_ns = ((UInt64) (when + midi->latency) * (UInt64) 1000000) + m->delta; + timestamp = (MIDITimeStamp) AudioConvertNanosToHostTime(when_ns); + + message[0] = Pm_MessageStatus(what); + message[1] = Pm_MessageData1(what); + message[2] = Pm_MessageData2(what); + messageLength = midi_length(what); + + /* make sure we go foreward in time */ + if (timestamp < m->min_next_time) timestamp = m->min_next_time; + + #ifdef LIMIT_RATE + if (timestamp < m->last_time) + timestamp = m->last_time; + m->last_time = timestamp + messageLength * m->host_ticks_per_byte; + #endif + + /* Add this message to the packet list */ + return send_packet(midi, message, messageLength, timestamp); +} + + +static PmError +midi_begin_sysex(PmInternal *midi, PmTimestamp when) +{ + UInt64 when_ns; + midi_macosxcm_type m = (midi_macosxcm_type) midi->descriptor; + assert(m); + m->sysex_byte_count = 0; + + /* compute timestamp */ + if (when == 0) when = midi->now; + /* if latency == 0, midi->now is not valid. We will just set it to zero */ + if (midi->latency == 0) when = 0; + when_ns = ((UInt64) (when + midi->latency) * (UInt64) 1000000) + m->delta; + m->sysex_timestamp = (MIDITimeStamp) AudioConvertNanosToHostTime(when_ns); + + if (m->packet == NULL) { + m->packet = MIDIPacketListInit(m->packetList); + /* this can never fail, right? failure would indicate something + unrecoverable */ + assert(m->packet); + } + return pmNoError; +} + + +static PmError +midi_end_sysex(PmInternal *midi, PmTimestamp when) +{ + PmError err; + midi_macosxcm_type m = (midi_macosxcm_type) midi->descriptor; + assert(m); + + /* make sure we go foreward in time */ + if (m->sysex_timestamp < m->min_next_time) + m->sysex_timestamp = m->min_next_time; + + #ifdef LIMIT_RATE + if (m->sysex_timestamp < m->last_time) + m->sysex_timestamp = m->last_time; + m->last_time = m->sysex_timestamp + m->sysex_byte_count * + m->host_ticks_per_byte; + #endif + + /* now send what's in the buffer */ + err = send_packet(midi, m->sysex_buffer, m->sysex_byte_count, + m->sysex_timestamp); + m->sysex_byte_count = 0; + if (err != pmNoError) { + m->packet = NULL; /* flush everything in the packet list */ + return err; + } + return pmNoError; +} + + +static PmError +midi_write_byte(PmInternal *midi, unsigned char byte, PmTimestamp timestamp) +{ + midi_macosxcm_type m = (midi_macosxcm_type) midi->descriptor; + assert(m); + if (m->sysex_byte_count >= SYSEX_BUFFER_SIZE) { + PmError err = midi_end_sysex(midi, timestamp); + if (err != pmNoError) return err; + } + m->sysex_buffer[m->sysex_byte_count++] = byte; + return pmNoError; +} + + +static PmError +midi_write_realtime(PmInternal *midi, PmEvent *event) +{ + /* to send a realtime message during a sysex message, first + flush all pending sysex bytes into packet list */ + PmError err = midi_end_sysex(midi, 0); + if (err != pmNoError) return err; + /* then we can just do a normal midi_write_short */ + return midi_write_short(midi, event); +} + +static unsigned int midi_has_host_error(PmInternal *midi) +{ + midi_macosxcm_type m = (midi_macosxcm_type) midi->descriptor; + return (m->callback_error[0] != 0) || (m->error[0] != 0); +} + + +static void midi_get_host_error(PmInternal *midi, char *msg, unsigned int len) +{ + midi_macosxcm_type m = (midi_macosxcm_type) midi->descriptor; + msg[0] = 0; /* initialize to empty string */ + if (m) { /* make sure there is an open device to examine */ + if (m->error[0]) { + strncpy(msg, m->error, len); + m->error[0] = 0; /* clear the error */ + } else if (m->callback_error[0]) { + strncpy(msg, m->callback_error, len); + m->callback_error[0] = 0; /* clear the error */ + } + msg[len - 1] = 0; /* make sure string is terminated */ + } +} + + +MIDITimeStamp timestamp_pm_to_cm(PmTimestamp timestamp) +{ + UInt64 nanos; + if (timestamp <= 0) { + return (MIDITimeStamp)0; + } else { + nanos = (UInt64)timestamp * (UInt64)1000000; + return (MIDITimeStamp)AudioConvertNanosToHostTime(nanos); + } +} + +PmTimestamp timestamp_cm_to_pm(MIDITimeStamp timestamp) +{ + UInt64 nanos; + nanos = AudioConvertHostTimeToNanos(timestamp); + return (PmTimestamp)(nanos / (UInt64)1000000); +} + + +// +// Code taken from http://developer.apple.com/qa/qa2004/qa1374.html +////////////////////////////////////// +// Obtain the name of an endpoint without regard for whether it has connections. +// The result should be released by the caller. +CFStringRef EndpointName(MIDIEndpointRef endpoint, bool isExternal) +{ + CFMutableStringRef result = CFStringCreateMutable(NULL, 0); + CFStringRef str; + + // begin with the endpoint's name + str = NULL; + MIDIObjectGetStringProperty(endpoint, kMIDIPropertyName, &str); + if (str != NULL) { + CFStringAppend(result, str); + CFRelease(str); + } + + MIDIEntityRef entity = NULL_REF; + MIDIEndpointGetEntity(endpoint, &entity); + if (entity == NULL_REF) + // probably virtual + return result; + + if (CFStringGetLength(result) == 0) { + // endpoint name has zero length -- try the entity + str = NULL; + MIDIObjectGetStringProperty(entity, kMIDIPropertyName, &str); + if (str != NULL) { + CFStringAppend(result, str); + CFRelease(str); + } + } + // now consider the device's name + MIDIDeviceRef device = NULL_REF; + MIDIEntityGetDevice(entity, &device); + if (device == NULL_REF) + return result; + + str = NULL; + MIDIObjectGetStringProperty(device, kMIDIPropertyName, &str); + if (CFStringGetLength(result) == 0) { + CFRelease(result); + return str; + } + if (str != NULL) { + // if an external device has only one entity, throw away + // the endpoint name and just use the device name + if (isExternal && MIDIDeviceGetNumberOfEntities(device) < 2) { + CFRelease(result); + return str; + } else { + if (CFStringGetLength(str) == 0) { + CFRelease(str); + return result; + } + // does the entity name already start with the device name? + // (some drivers do this though they shouldn't) + // if so, do not prepend + if (CFStringCompareWithOptions( result, /* endpoint name */ + str /* device name */, + CFRangeMake(0, CFStringGetLength(str)), 0) != kCFCompareEqualTo) { + // prepend the device name to the entity name + if (CFStringGetLength(result) > 0) + CFStringInsert(result, 0, CFSTR(" ")); + CFStringInsert(result, 0, str); + } + CFRelease(str); + } + } + return result; +} + + +// Obtain the name of an endpoint, following connections. +// The result should be released by the caller. +static CFStringRef ConnectedEndpointName(MIDIEndpointRef endpoint) +{ + CFMutableStringRef result = CFStringCreateMutable(NULL, 0); + CFStringRef str; + OSStatus err; + long i; + + // Does the endpoint have connections? + CFDataRef connections = NULL; + long nConnected = 0; + bool anyStrings = false; + err = MIDIObjectGetDataProperty(endpoint, kMIDIPropertyConnectionUniqueID, &connections); + if (connections != NULL) { + // It has connections, follow them + // Concatenate the names of all connected devices + nConnected = CFDataGetLength(connections) / (int32_t) sizeof(MIDIUniqueID); + if (nConnected) { + const SInt32 *pid = (const SInt32 *)(CFDataGetBytePtr(connections)); + for (i = 0; i < nConnected; ++i, ++pid) { + MIDIUniqueID id = EndianS32_BtoN(*pid); + MIDIObjectRef connObject; + MIDIObjectType connObjectType; + err = MIDIObjectFindByUniqueID(id, &connObject, &connObjectType); + if (err == noErr) { + if (connObjectType == kMIDIObjectType_ExternalSource || + connObjectType == kMIDIObjectType_ExternalDestination) { + // Connected to an external device's endpoint (10.3 and later). + str = EndpointName((MIDIEndpointRef)(connObject), true); + } else { + // Connected to an external device (10.2) (or something else, catch-all) + str = NULL; + MIDIObjectGetStringProperty(connObject, kMIDIPropertyName, &str); + } + if (str != NULL) { + if (anyStrings) + CFStringAppend(result, CFSTR(", ")); + else anyStrings = true; + CFStringAppend(result, str); + CFRelease(str); + } + } + } + } + CFRelease(connections); + } + if (anyStrings) + return result; + + // Here, either the endpoint had no connections, or we failed to obtain names for any of them. + return EndpointName(endpoint, false); +} + + +char* cm_get_full_endpoint_name(MIDIEndpointRef endpoint) +{ +#ifdef OLDCODE + MIDIEntityRef entity; + MIDIDeviceRef device; + + CFStringRef endpointName = NULL; + CFStringRef deviceName = NULL; +#endif + CFStringRef fullName = NULL; + CFStringEncoding defaultEncoding; + char* newName; + + /* get the default string encoding */ + defaultEncoding = CFStringGetSystemEncoding(); + + fullName = ConnectedEndpointName(endpoint); + +#ifdef OLDCODE + /* get the entity and device info */ + MIDIEndpointGetEntity(endpoint, &entity); + MIDIEntityGetDevice(entity, &device); + + /* create the nicely formated name */ + MIDIObjectGetStringProperty(endpoint, kMIDIPropertyName, &endpointName); + MIDIObjectGetStringProperty(device, kMIDIPropertyName, &deviceName); + if (deviceName != NULL) { + fullName = CFStringCreateWithFormat(NULL, NULL, CFSTR("%@: %@"), + deviceName, endpointName); + } else { + fullName = endpointName; + } +#endif + /* copy the string into our buffer */ + newName = (char *) malloc(CFStringGetLength(fullName) + 1); + CFStringGetCString(fullName, newName, CFStringGetLength(fullName) + 1, + defaultEncoding); + + /* clean up */ +#ifdef OLDCODE + if (endpointName) CFRelease(endpointName); + if (deviceName) CFRelease(deviceName); +#endif + if (fullName) CFRelease(fullName); + + return newName; +} + + + +pm_fns_node pm_macosx_in_dictionary = { + none_write_short, + none_sysex, + none_sysex, + none_write_byte, + none_write_short, + none_write_flush, + none_synchronize, + midi_in_open, + midi_abort, + midi_in_close, + success_poll, + midi_has_host_error, + midi_get_host_error, +}; + +pm_fns_node pm_macosx_out_dictionary = { + midi_write_short, + midi_begin_sysex, + midi_end_sysex, + midi_write_byte, + midi_write_realtime, + midi_write_flush, + midi_synchronize, + midi_out_open, + midi_abort, + midi_out_close, + success_poll, + midi_has_host_error, + midi_get_host_error, +}; + + +PmError pm_macosxcm_init(void) +{ + ItemCount numInputs, numOutputs, numDevices; + MIDIEndpointRef endpoint; + int i; + OSStatus macHostError; + char *error_text; + + /* Determine the number of MIDI devices on the system */ + numDevices = MIDIGetNumberOfDevices(); + numInputs = MIDIGetNumberOfSources(); + numOutputs = MIDIGetNumberOfDestinations(); + + /* Return prematurely if no devices exist on the system + Note that this is not an error. There may be no devices. + Pm_CountDevices() will return zero, which is correct and + useful information + */ + if (numDevices <= 0) { + return pmNoError; + } + + + /* Initialize the client handle */ + macHostError = MIDIClientCreate(CFSTR("PortMidi"), NULL, NULL, &client); + if (macHostError != noErr) { + error_text = "MIDIClientCreate() in pm_macosxcm_init()"; + goto error_return; + } + + /* Create the input port */ + macHostError = MIDIInputPortCreate(client, CFSTR("Input port"), readProc, + NULL, &portIn); + if (macHostError != noErr) { + error_text = "MIDIInputPortCreate() in pm_macosxcm_init()"; + goto error_return; + } + + /* Create the output port */ + macHostError = MIDIOutputPortCreate(client, CFSTR("Output port"), &portOut); + if (macHostError != noErr) { + error_text = "MIDIOutputPortCreate() in pm_macosxcm_init()"; + goto error_return; + } + + /* Iterate over the MIDI input devices */ + for (i = 0; i < numInputs; i++) { + endpoint = MIDIGetSource(i); + if (endpoint == NULL_REF) { + continue; + } + + /* set the first input we see to the default */ + if (pm_default_input_device_id == -1) + pm_default_input_device_id = pm_descriptor_index; + + /* Register this device with PortMidi */ + pm_add_device("CoreMIDI", cm_get_full_endpoint_name(endpoint), + TRUE, (void *) (long) endpoint, &pm_macosx_in_dictionary); + } + + /* Iterate over the MIDI output devices */ + for (i = 0; i < numOutputs; i++) { + endpoint = MIDIGetDestination(i); + if (endpoint == NULL_REF) { + continue; + } + + /* set the first output we see to the default */ + if (pm_default_output_device_id == -1) + pm_default_output_device_id = pm_descriptor_index; + + /* Register this device with PortMidi */ + pm_add_device("CoreMIDI", cm_get_full_endpoint_name(endpoint), + FALSE, (void *) (long) endpoint, + &pm_macosx_out_dictionary); + } + return pmNoError; + +error_return: + pm_hosterror = macHostError; + sprintf(pm_hosterror_text, "Host error %ld: %s\n", (long) macHostError, + error_text); + pm_macosxcm_term(); /* clear out any opened ports */ + return pmHostError; +} + +void pm_macosxcm_term(void) +{ + if (client != NULL_REF) MIDIClientDispose(client); + if (portIn != NULL_REF) MIDIPortDispose(portIn); + if (portOut != NULL_REF) MIDIPortDispose(portOut); +} |