ShuriZma
/
RetroArch
mirror of https://github.com/libretro/RetroArch.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity
RetroArch/midi/drivers/coremidi.c

416 lines
13 KiB
C
Raw Blame History

/* RetroArch - A frontend for libretro.
* Copyright (C) 2025 The RetroArch team
*
* RetroArch 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 Found-
* ation, either version 3 of the License, or (at your option) any later version.
*
* RetroArch 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 RetroArch.
* If not, see <http://www.gnu.org/licenses/>.
*/
#include <CoreMIDI/CoreMIDI.h>
#include <libretro.h>
#include <lists/string_list.h>
#include <string/stdstring.h>
#include "../midi_driver.h"
#include "../../verbosity.h"
#define CORE_MIDI_QUEUE_SIZE 1024
typedef struct {
midi_event_t events[CORE_MIDI_QUEUE_SIZE]; ///< Event buffer
int read_index; ///< Current read position
int write_index; ///< Current write position
} coremidi_queue_t;
typedef struct {
MIDIClientRef client; ///< CoreMIDI client
MIDIPortRef input_port; ///< Input port for receiving MIDI data
MIDIPortRef output_port; ///< Output port for sending MIDI data
MIDIEndpointRef input_endpoint; ///< Selected input endpoint
MIDIEndpointRef output_endpoint; ///< Selected output endpoint
coremidi_queue_t input_queue; ///< Queue for incoming MIDI events
} coremidi_t;
/// Write to the queue
static bool coremidi_queue_write(coremidi_queue_t *q, const midi_event_t *ev) {
int next_write = (q->write_index + 1) % CORE_MIDI_QUEUE_SIZE;
if (next_write == q->read_index) // Queue full
return false;
memcpy(&q->events[q->write_index], ev, sizeof(*ev));
q->write_index = next_write;
return true;
}
/// MIDIReadProc callback function
static void midi_read_callback(const MIDIPacketList *pktlist, void *readProcRefCon, void *srcConnRefCon) {
coremidi_t *d = (coremidi_t *)readProcRefCon;
const MIDIPacket *packet = &pktlist->packet[0];
midi_event_t event;
uint32_t i;
for (i = 0; i < pktlist->numPackets; i++) {
const uint8_t *data = packet->data;
size_t length = packet->length;
const MIDITimeStamp timestamp = packet->timeStamp;
while (length > 0) {
size_t msg_size = midi_driver_get_event_size(data[0]);
if (msg_size == 0 || msg_size > length)
break;
event.data = (uint8_t *)data;
event.data_size = msg_size;
event.delta_time = (uint32_t)timestamp;
// Add to queue
coremidi_queue_write(&d->input_queue, &event);
data += msg_size;
length -= msg_size;
}
packet = MIDIPacketNext(packet);
}
}
/// Initialize the CoreMIDI client and ports
static void *coremidi_init(const char *input, const char *output) {
coremidi_t *d = (coremidi_t *)calloc(1, sizeof(coremidi_t));
if (!d) {
RARCH_ERR("[MIDI]: Out of memory.\n");
return NULL;
}
OSStatus err = MIDIClientCreate(CFSTR("RetroArch MIDI Client"), NULL, NULL, &d->client);
if (err != noErr) {
RARCH_ERR("[MIDI]: MIDIClientCreate failed: %d\n", err);
free(d);
return NULL;
} else {
RARCH_LOG("[MIDI]: CoreMIDI client created successfully\n");
}
// Create input port if specified
if (input) {
err = MIDIInputPortCreate(d->client, CFSTR("Input Port"), midi_read_callback, d, &d->input_port);
if (err != noErr) {
RARCH_ERR("[MIDI]: MIDIInputPortCreate failed: %d\n", err);
MIDIClientDispose(d->client);
free(d);
return NULL;
}
} else {
RARCH_LOG("[MIDI]: CoreMIDI input port created successfully\n");
}
// Create output port if specified
if (output) {
err = MIDIOutputPortCreate(d->client, CFSTR("Output Port"), &d->output_port);
if (err != noErr) {
RARCH_ERR("[MIDI]: MIDIOutputPortCreate failed: %d\n", err);
if (d->input_port)
MIDIPortDispose(d->input_port);
MIDIClientDispose(d->client);
free(d);
return NULL;
}
} else {
RARCH_LOG("[MIDI]: CoreMIDI output port created successfully\n");
}
return d;
}
/// Get available input devices
static bool coremidi_get_avail_inputs(struct string_list *inputs) {
ItemCount count = MIDIGetNumberOfSources();
union string_list_elem_attr attr = {0};
for (ItemCount i = 0; i < count; i++) {
MIDIEndpointRef endpoint = MIDIGetSource(i);
CFStringRef name;
char buf[256];
OSStatus err = MIDIObjectGetStringProperty(endpoint, kMIDIPropertyDisplayName, &name);
if (err == noErr) {
if (CFStringGetCString(name, buf, sizeof(buf), kCFStringEncodingUTF8)) {
if (!string_list_append(inputs, buf, attr)) {
RARCH_ERR("[MIDI]: Failed to append input device to list: %s\n", buf);
CFRelease(name);
return false;
} else {
RARCH_LOG("[MIDI]: Input device added to list: %s\n", buf);
}
}
CFRelease(name);
} else {
RARCH_WARN("[MIDI]: Failed to get display name for input device %d: %d\n", i, err);
}
}
return true;
}
/// Get available output devices
static bool coremidi_get_avail_outputs(struct string_list *outputs) {
ItemCount count = MIDIGetNumberOfDestinations();
union string_list_elem_attr attr = {0};
for (ItemCount i = 0; i < count; i++) {
MIDIEndpointRef endpoint = MIDIGetDestination(i);
CFStringRef name;
char buf[256];
OSStatus err = MIDIObjectGetStringProperty(endpoint, kMIDIPropertyDisplayName, &name);
if (err == noErr) {
if (CFStringGetCString(name, buf, sizeof(buf), kCFStringEncodingUTF8)) {
if (!string_list_append(outputs, buf, attr)) {
RARCH_ERR("[MIDI]: Failed to append output device to list: %s\n", buf);
CFRelease(name);
return false;
} else {
RARCH_LOG("[MIDI]: Output device added to list: %s\n", buf);
}
}
CFRelease(name);
} else {
RARCH_WARN("[MIDI]: Failed to get display name for output device %d: %d\n", i, err);
}
}
return true;
}
/// Set the input device
static bool coremidi_set_input(void *p, const char *input) {
coremidi_t *d = (coremidi_t *)p;
if (!d || !d->input_port) {
RARCH_WARN("[MIDI]: Input port not initialized\n");
return false;
}
// Disconnect current input endpoint
if (d->input_endpoint) {
RARCH_LOG("[MIDI]: Disconnecting current input endpoint\n");
MIDIPortDisconnectSource(d->input_port, d->input_endpoint);
d->input_endpoint = 0;
}
// If input is NULL or "Off", just return success
if (!input || string_is_equal(input, "Off")) {
RARCH_LOG("[MIDI]: Input set to Off\n");
return true;
}
// Find the input endpoint by name
ItemCount count = MIDIGetNumberOfSources();
for (ItemCount i = 0; i < count; i++) {
MIDIEndpointRef endpoint = MIDIGetSource(i);
CFStringRef name;
char buf[256];
OSStatus err = MIDIObjectGetStringProperty(endpoint, kMIDIPropertyDisplayName, &name);
if (err == noErr) {
if (CFStringGetCString(name, buf, sizeof(buf), kCFStringEncodingUTF8) && string_is_equal(input, buf)) {
err = MIDIPortConnectSource(d->input_port, endpoint, NULL);
CFRelease(name);
if (err == noErr) {
d->input_endpoint = endpoint;
RARCH_LOG("[MIDI]: Input endpoint set to %s\n", buf);
return true;
} else {
RARCH_WARN("[MIDI]: Failed to connect input endpoint: %d\n", err);
return false;
}
}
CFRelease(name);
}
}
RARCH_WARN("[MIDI]: Input device not found: %s\n", input);
return false;
}
/// Set the output device
static bool coremidi_set_output(void *p, const char *output) {
coremidi_t *d = (coremidi_t *)p;
if (!d || !d->output_port) {
RARCH_WARN("[MIDI]: Output port not initialized\n");
return false;
}
// If output is NULL or "Off", just return success
if (!output || string_is_equal(output, "Off")) {
RARCH_LOG("[MIDI]: Output set to Off\n");
d->output_endpoint = 0;
return true;
}
// Find the output endpoint by name
ItemCount count = MIDIGetNumberOfDestinations();
for (ItemCount i = 0; i < count; i++) {
MIDIEndpointRef endpoint = MIDIGetDestination(i);
CFStringRef name;
char buf[256];
OSStatus err = MIDIObjectGetStringProperty(endpoint, kMIDIPropertyDisplayName, &name);
if (err == noErr) {
if (CFStringGetCString(name, buf, sizeof(buf), kCFStringEncodingUTF8) && string_is_equal(output, buf)) {
d->output_endpoint = endpoint;
RARCH_LOG("[MIDI]: Output endpoint set to %s\n", buf);
CFRelease(name);
return true;
}
CFRelease(name);
}
}
RARCH_WARN("[MIDI]: Output device not found: %s\n", output);
return false;
}
/// Read from the queue
static bool coremidi_queue_read(coremidi_queue_t *q, midi_event_t *ev) {
if (q->read_index == q->write_index) // Queue empty
return false;
memcpy(ev, &q->events[q->read_index], sizeof(*ev));
q->read_index = (q->read_index + 1) % CORE_MIDI_QUEUE_SIZE;
return true;
}
/// Read a MIDI event
static bool coremidi_read(void *p, midi_event_t *event) {
coremidi_t *d = (coremidi_t *)p;
if (!d || !event) {
RARCH_WARN("[MIDI]: Invalid parameters in coremidi_read\n");
return false;
}
if (!d->input_port || !d->input_endpoint) {
RARCH_WARN("[MIDI]: Input not configured\n");
return false;
}
int result = coremidi_queue_read(&d->input_queue, event);
// #if DEBUG
RARCH_LOG("[MIDI]: Input queue read result: %d\n", result);
// #endif
return result;
}
/// Write a MIDI event
static bool coremidi_write(void *p, const midi_event_t *event) {
coremidi_t *d = (coremidi_t *)p;
if (!d || !event) {
RARCH_WARN("[MIDI]: Invalid parameters in coremidi_write\n");
return false;
}
if (!d->output_port || !d->output_endpoint) {
RARCH_WARN("[MIDI]: Output not configured\n");
return false;
}
// Validate event data
if (!event->data || event->data_size == 0 || event->data_size > 65535) {
RARCH_WARN("[MIDI]: Invalid event data in coremidi_write\n");
return false;
}
// Create a MIDIPacketList with sufficient buffer size
char packetListBuffer[sizeof(MIDIPacketList) + sizeof(MIDIPacket) + event->data_size];
MIDIPacketList *packetList = (MIDIPacketList *)packetListBuffer;
MIDIPacket *packet = MIDIPacketListInit(packetList);
// Add the event to the packet list
packet = MIDIPacketListAdd(packetList, sizeof(packetListBuffer), packet, 0, event->data_size, event->data);
if (!packet) {
RARCH_WARN("[MIDI]: Failed to create MIDIPacketList\n");
return false;
}
// Send the packet
OSStatus err = MIDISend(d->output_port, d->output_endpoint, packetList);
if (err != noErr) {
RARCH_WARN("[MIDI]: MIDISend failed: %d\n", err);
return false;
}
return true;
}
/// Flush the output buffer
static bool coremidi_flush(void *p) {
coremidi_t *d = (coremidi_t *)p;
if (!d) {
RARCH_WARN("[MIDI]: Invalid parameters in coremidi_flush\n");
return false;
}
if (!d->output_port || !d->output_endpoint) {
RARCH_WARN("[MIDI]: Output not configured\n");
return false;
}
// CoreMIDI doesn't require explicit flushing, so we just return success
// RARCH_LOG("[MIDI]: Output buffer flushed\n");
return true;
}
/// Free resources and cleanup
static void coremidi_free(void *p) {
coremidi_t *d = (coremidi_t *)p;
if (!d) {
RARCH_WARN("[MIDI]: Invalid parameters in coremidi_free\n");
return;
}
// Clean up MIDI resources
if (d->input_port) {
RARCH_LOG("[MIDI]: Disconnecting input port\n");
MIDIPortDisconnectSource(d->input_port, d->input_endpoint);
MIDIPortDispose(d->input_port);
}
if (d->output_port) {
RARCH_LOG("[MIDI]: Disconnecting output port\n");
MIDIPortDisconnectSource(d->output_port, d->output_endpoint);
MIDIPortDispose(d->output_port);
}
if (d->client) {
RARCH_LOG("[MIDI]: Disposing of CoreMIDI client\n");
MIDIClientDispose(d->client);
}
// Free the driver instance
free(d);
}
/// CoreMIDI driver API
midi_driver_t midi_coremidi = {
.ident = "coremidi",
.init = coremidi_init,
.free = coremidi_free,
.set_input = coremidi_set_input,
.set_output = coremidi_set_output,
.read = coremidi_read,
.write = coremidi_write,
.flush = coremidi_flush,
.get_avail_inputs = coremidi_get_avail_inputs,
.get_avail_outputs = coremidi_get_avail_outputs,
};
Reference in New Issue View Git Blame Copy Permalink