asgardius/virtualx-engine
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

Move MIDI parsing up from ALSA driver to platform independent driver.

Browse source 
Aims for more consistent MIDI support across Windows, MacOS, Linux and
to provide a base for adding MIDI drivers for other platforms.
Reworks the MIDIDriverALSAMidi MIDI parsing implementation as a platform
independent version in MIDIDriver::Parser.
Uses MIDIDriver::Parser to provide running status support in MacOS
MIDIDriverCoreMidi.
Collects connected input names at open, ensuring devices indices reported
in events match names in array returned from get_connected_inputs.

Fixes #77035.
Fixes #79811.

With code review changes by: A Thousand Ships (she/her)
<96648715+AThousandShips@users.noreply.github.com>
This commit is contained in:
Ibrahn Sahir 2024-04-10 10:50:28 +01:00
parent 6b281c0c07
commit 607c5ec49f
8 changed files with 335 additions and 319 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

209
core/os/midi_driver.cpp
View file

@ -38,88 +38,167 @@ MIDIDriver *MIDIDriver::get_singleton() {
return singleton;
}
void MIDIDriver::set_singleton() {
MIDIDriver::MIDIDriver() {
singleton = this;
}
void MIDIDriver::receive_input_packet(int device_index, uint64_t timestamp, uint8_t *data, uint32_t length) {
MIDIDriver::MessageCategory MIDIDriver::Parser::category(uint8_t p_midi_fragment) {
if (p_midi_fragment >= 0xf8) {
return MessageCategory::RealTime;
} else if (p_midi_fragment >= 0xf0) {
// System Exclusive begin/end are specified as System Common Category
// messages, but we separate them here and give them their own categories
// as their behavior is significantly different.
if (p_midi_fragment == 0xf0) {
return MessageCategory::SysExBegin;
} else if (p_midi_fragment == 0xf7) {
return MessageCategory::SysExEnd;
}
return MessageCategory::SystemCommon;
} else if (p_midi_fragment >= 0x80) {
return MessageCategory::Voice;
}
return MessageCategory::Data;
}
MIDIMessage MIDIDriver::Parser::status_to_msg_enum(uint8_t p_status_byte) {
if (p_status_byte & 0x80) {
if (p_status_byte < 0xf0) {
return MIDIMessage(p_status_byte >> 4);
} else {
return MIDIMessage(p_status_byte);
}
}
return MIDIMessage::NONE;
}
size_t MIDIDriver::Parser::expected_data(uint8_t p_status_byte) {
return expected_data(status_to_msg_enum(p_status_byte));
}
size_t MIDIDriver::Parser::expected_data(MIDIMessage p_msg_type) {
switch (p_msg_type) {
case MIDIMessage::NOTE_OFF:
case MIDIMessage::NOTE_ON:
case MIDIMessage::AFTERTOUCH:
case MIDIMessage::CONTROL_CHANGE:
case MIDIMessage::PITCH_BEND:
case MIDIMessage::SONG_POSITION_POINTER:
return 2;
case MIDIMessage::PROGRAM_CHANGE:
case MIDIMessage::CHANNEL_PRESSURE:
case MIDIMessage::QUARTER_FRAME:
case MIDIMessage::SONG_SELECT:
return 1;
default:
return 0;
}
}
uint8_t MIDIDriver::Parser::channel(uint8_t p_status_byte) {
if (category(p_status_byte) == MessageCategory::Voice) {
return p_status_byte & 0x0f;
}
return 0;
}
void MIDIDriver::send_event(int p_device_index, uint8_t p_status,
const uint8_t *p_data, size_t p_data_len) {
const MIDIMessage msg = Parser::status_to_msg_enum(p_status);
ERR_FAIL_COND(p_data_len < Parser::expected_data(msg));
Ref<InputEventMIDI> event;
event.instantiate();
event->set_device(device_index);
uint32_t param_position = 1;
if (length >= 1) {
if (data[0] >= 0xF0) {
// channel does not apply to system common messages
event->set_channel(0);
event->set_message(MIDIMessage(data[0]));
last_received_message = data[0];
} else if ((data[0] & 0x80) == 0x00) {
// running status
event->set_channel(last_received_message & 0xF);
event->set_message(MIDIMessage(last_received_message >> 4));
param_position = 0;
} else {
event->set_channel(data[0] & 0xF);
event->set_message(MIDIMessage(data[0] >> 4));
param_position = 1;
last_received_message = data[0];
}
}
switch (event->get_message()) {
case MIDIMessage::AFTERTOUCH:
if (length >= 2 + param_position) {
event->set_pitch(data[param_position]);
event->set_pressure(data[param_position + 1]);
}
break;
case MIDIMessage::CONTROL_CHANGE:
if (length >= 2 + param_position) {
event->set_controller_number(data[param_position]);
event->set_controller_value(data[param_position + 1]);
}
break;
case MIDIMessage::NOTE_ON:
event->set_device(p_device_index);
event->set_channel(Parser::channel(p_status));
event->set_message(msg);
switch (msg) {
case MIDIMessage::NOTE_OFF:
if (length >= 2 + param_position) {
event->set_pitch(data[param_position]);
event->set_velocity(data[param_position + 1]);
}
case MIDIMessage::NOTE_ON:
event->set_pitch(p_data[0]);
event->set_velocity(p_data[1]);
break;
case MIDIMessage::PITCH_BEND:
if (length >= 2 + param_position) {
event->set_pitch((data[param_position + 1] << 7) | data[param_position]);
}
case MIDIMessage::AFTERTOUCH:
event->set_pitch(p_data[0]);
event->set_pressure(p_data[1]);
break;
case MIDIMessage::CONTROL_CHANGE:
event->set_controller_number(p_data[0]);
event->set_controller_value(p_data[1]);
break;
case MIDIMessage::PROGRAM_CHANGE:
if (length >= 1 + param_position) {
event->set_instrument(data[param_position]);
}
event->set_instrument(p_data[0]);
break;
case MIDIMessage::CHANNEL_PRESSURE:
if (length >= 1 + param_position) {
event->set_pressure(data[param_position]);
}
event->set_pressure(p_data[0]);
break;
case MIDIMessage::PITCH_BEND:
event->set_pitch((p_data[1] << 7) | p_data[0]);
break;
// QUARTER_FRAME, SONG_POSITION_POINTER, and SONG_SELECT not yet implemented.
default:
break;
}
Input *id = Input::get_singleton();
id->parse_input_event(event);
Input::get_singleton()->parse_input_event(event);
}
PackedStringArray MIDIDriver::get_connected_inputs() {
PackedStringArray list;
return list;
void MIDIDriver::Parser::parse_fragment(uint8_t p_fragment) {
switch (category(p_fragment)) {
case MessageCategory::RealTime:
// Real-Time messages are single byte messages that can
// occur at any point and do not interrupt other messages.
// We pass them straight through.
MIDIDriver::send_event(device_index, p_fragment);
break;
case MessageCategory::SysExBegin:
status_byte = p_fragment;
skipping_sys_ex = true;
break;
case MessageCategory::SysExEnd:
status_byte = 0;
skipping_sys_ex = false;
break;
case MessageCategory::Voice:
case MessageCategory::SystemCommon:
skipping_sys_ex = false; // If we were in SysEx, assume it was aborted.
received_data_len = 0;
status_byte = 0;
ERR_FAIL_COND(expected_data(p_fragment) > DATA_BUFFER_SIZE);
if (expected_data(p_fragment) == 0) {
// No data bytes needed, post it now.
MIDIDriver::send_event(device_index, p_fragment);
} else {
status_byte = p_fragment;
}
break;
case MessageCategory::Data:
// We don't currently process SysEx messages, so ignore their data.
if (!skipping_sys_ex) {
const size_t expected = expected_data(status_byte);
if (received_data_len < expected) {
data_buffer[received_data_len] = p_fragment;
received_data_len++;
if (received_data_len == expected) {
MIDIDriver::send_event(device_index, status_byte,
data_buffer, expected);
received_data_len = 0;
// Voice messages can use 'running status', sending further
// messages without resending their status byte.
// For other messages types we clear the cached status byte.
if (category(status_byte) != MessageCategory::Voice) {
status_byte = 0;
}
}
}
}
break;
}
}
MIDIDriver::MIDIDriver() {
set_singleton();
PackedStringArray MIDIDriver::get_connected_inputs() const {
return connected_input_names;
}

68
core/os/midi_driver.h
View file

@ -42,19 +42,73 @@ class MIDIDriver {
static MIDIDriver *singleton;
static uint8_t last_received_message;
protected:
// Categories of message for parser logic.
enum class MessageCategory {
Data,
Voice,
SysExBegin,
SystemCommon, // excluding System Exclusive Begin/End
SysExEnd,
RealTime,
};
// Convert midi data to InputEventMIDI and send it to Input.
// p_data_len is the length of the buffer passed at p_data, this must be
// at least equal to the data required by the passed message type, but
// may be larger. Only the required data will be read.
static void send_event(int p_device_index, uint8_t p_status,
const uint8_t *p_data = nullptr, size_t p_data_len = 0);
class Parser {
public:
Parser() = default;
Parser(int p_device_index) :
device_index{ p_device_index } {}
virtual ~Parser() = default;
// Push a byte of MIDI stream. Any completed messages will be
// forwarded to MIDIDriver::send_event.
void parse_fragment(uint8_t p_fragment);
static MessageCategory category(uint8_t p_midi_fragment);
// If the byte is a Voice Message status byte return the contained
// channel number, otherwise zero.
static uint8_t channel(uint8_t p_status_byte);
// If the byte is a status byte for a message with a fixed number of
// additional data bytes, return the number expected, otherwise zero.
static size_t expected_data(uint8_t p_status_byte);
static size_t expected_data(MIDIMessage p_msg_type);
// If the fragment is a status byte return the message type
// represented, otherwise MIDIMessage::NONE.
static MIDIMessage status_to_msg_enum(uint8_t p_status_byte);
private:
int device_index = 0;
static constexpr size_t DATA_BUFFER_SIZE = 2;
uint8_t status_byte = 0;
uint8_t data_buffer[DATA_BUFFER_SIZE] = { 0 };
size_t received_data_len = 0;
bool skipping_sys_ex = false;
};
PackedStringArray connected_input_names;
public:
static MIDIDriver *get_singleton();
void set_singleton();
MIDIDriver();
virtual ~MIDIDriver() = default;
virtual Error open() = 0;
virtual void close() = 0;
virtual PackedStringArray get_connected_inputs();
static void receive_input_packet(int device_index, uint64_t timestamp, uint8_t *data, uint32_t length);
MIDIDriver();
virtual ~MIDIDriver() {}
PackedStringArray get_connected_inputs() const;
};
#endif // MIDI_DRIVER_H

177
drivers/alsamidi/midi_driver_alsamidi.cpp
View file

@ -37,137 +37,36 @@
#include <errno.h>
MIDIDriverALSAMidi::MessageCategory MIDIDriverALSAMidi::msg_category(uint8_t msg_part) {
if (msg_part >= 0xf8) {
return MessageCategory::RealTime;
} else if (msg_part >= 0xf0) {
// System Exclusive begin/end are specified as System Common Category messages,
// but we separate them here and give them their own categories as their
// behavior is significantly different.
if (msg_part == 0xf0) {
return MessageCategory::SysExBegin;
} else if (msg_part == 0xf7) {
return MessageCategory::SysExEnd;
}
return MessageCategory::SystemCommon;
} else if (msg_part >= 0x80) {
return MessageCategory::Voice;
}
return MessageCategory::Data;
}
MIDIDriverALSAMidi::InputConnection::InputConnection(int p_device_index,
snd_rawmidi_t *p_rawmidi) :
parser(p_device_index), rawmidi_ptr(p_rawmidi) {}
size_t MIDIDriverALSAMidi::msg_expected_data(uint8_t status_byte) {
if (msg_category(status_byte) == MessageCategory::Voice) {
// Voice messages have a channel number in the status byte, mask it out.
status_byte &= 0xf0;
}
switch (status_byte) {
case 0x80: // Note Off
case 0x90: // Note On
case 0xA0: // Polyphonic Key Pressure (Aftertouch)
case 0xB0: // Control Change (CC)
case 0xE0: // Pitch Bend Change
case 0xF2: // Song Position Pointer
return 2;
case 0xC0: // Program Change
case 0xD0: // Channel Pressure (Aftertouch)
case 0xF1: // MIDI Time Code Quarter Frame
case 0xF3: // Song Select
return 1;
}
return 0;
}
void MIDIDriverALSAMidi::InputConnection::parse_byte(uint8_t byte, MIDIDriverALSAMidi &driver,
uint64_t timestamp, int device_index) {
switch (msg_category(byte)) {
case MessageCategory::RealTime:
// Real-Time messages are single byte messages that can
// occur at any point.
// We pass them straight through.
driver.receive_input_packet(device_index, timestamp, &byte, 1);
break;
case MessageCategory::Data:
// We don't currently forward System Exclusive messages so skip their data.
// Collect any expected data for other message types.
if (!skipping_sys_ex && expected_data > received_data) {
buffer[received_data + 1] = byte;
received_data++;
// Forward a complete message and reset relevant state.
if (received_data == expected_data) {
driver.receive_input_packet(device_index, timestamp, buffer, received_data + 1);
received_data = 0;
if (msg_category(buffer[0]) != MessageCategory::Voice) {
// Voice Category messages can be sent with "running status".
// This means they don't resend the status byte until it changes.
// For other categories, we reset expected data, to require a new status byte.
expected_data = 0;
}
}
}
break;
case MessageCategory::SysExBegin:
buffer[0] = byte;
skipping_sys_ex = true;
break;
case MessageCategory::SysExEnd:
expected_data = 0;
skipping_sys_ex = false;
break;
case MessageCategory::Voice:
case MessageCategory::SystemCommon:
buffer[0] = byte;
received_data = 0;
expected_data = msg_expected_data(byte);
skipping_sys_ex = false;
if (expected_data == 0) {
driver.receive_input_packet(device_index, timestamp, &byte, 1);
}
break;
}
}
int MIDIDriverALSAMidi::InputConnection::read_in(MIDIDriverALSAMidi &driver, uint64_t timestamp, int device_index) {
int ret;
void MIDIDriverALSAMidi::InputConnection::read() {
int read_count;
do {
uint8_t byte = 0;
ret = snd_rawmidi_read(rawmidi_ptr, &byte, 1);
uint8_t buffer[32];
read_count = snd_rawmidi_read(rawmidi_ptr, buffer, sizeof(buffer));
if (ret < 0) {
if (ret != -EAGAIN) {
ERR_PRINT("snd_rawmidi_read error: " + String(snd_strerror(ret)));
if (read_count < 0) {
if (read_count != -EAGAIN) {
ERR_PRINT("snd_rawmidi_read error: " + String(snd_strerror(read_count)));
}
} else {
parse_byte(byte, driver, timestamp, device_index);
for (int i = 0; i < read_count; i++) {
parser.parse_fragment(buffer[i]);
}
} while (ret > 0);
return ret;
}
} while (read_count > 0);
}
void MIDIDriverALSAMidi::thread_func(void *p_udata) {
MIDIDriverALSAMidi *md = static_cast<MIDIDriverALSAMidi *>(p_udata);
uint64_t timestamp = 0;
while (!md->exit_thread.is_set()) {
md->lock();
InputConnection *connections = md->connected_inputs.ptrw();
size_t connection_count = md->connected_inputs.size();
for (size_t i = 0; i < connection_count; i++) {
connections[i].read_in(*md, timestamp, (int)i);
for (InputConnection &conn : md->connected_inputs) {
conn.read();
}
md->unlock();
OS::get_singleton()->delay_usec(1000);
@ -181,15 +80,25 @@ Error MIDIDriverALSAMidi::open() {
return ERR_CANT_OPEN;
}
int i = 0;
for (void **n = hints; *n != nullptr; n++) {
char *name = snd_device_name_get_hint(*n, "NAME");
lock();
int device_index = 0;
for (void **h = hints; *h != nullptr; h++) {
char *name = snd_device_name_get_hint(*h, "NAME");
if (name != nullptr) {
snd_rawmidi_t *midi_in;
int ret = snd_rawmidi_open(&midi_in, nullptr, name, SND_RAWMIDI_NONBLOCK);
if (ret >= 0) {
connected_inputs.insert(i++, InputConnection(midi_in));
// Get display name.
snd_rawmidi_info_t *info;
snd_rawmidi_info_malloc(&info);
snd_rawmidi_info(midi_in, info);
connected_input_names.push_back(snd_rawmidi_info_get_name(info));
snd_rawmidi_info_free(info);
connected_inputs.push_back(InputConnection(device_index, midi_in));
// Only increment device_index for successfully connected devices.
device_index++;
}
}
@ -198,6 +107,7 @@ Error MIDIDriverALSAMidi::open() {
}
}
snd_device_name_free_hint(hints);
unlock();
exit_thread.clear();
thread.start(MIDIDriverALSAMidi::thread_func, this);
@ -211,11 +121,12 @@ void MIDIDriverALSAMidi::close() {
thread.wait_to_finish();
}
for (int i = 0; i < connected_inputs.size(); i++) {
snd_rawmidi_t *midi_in = connected_inputs[i].rawmidi_ptr;
snd_rawmidi_close(midi_in);
for (const InputConnection &conn : connected_inputs) {
snd_rawmidi_close(conn.rawmidi_ptr);
}
connected_inputs.clear();
connected_input_names.clear();
}
void MIDIDriverALSAMidi::lock() const {
@ -226,24 +137,6 @@ void MIDIDriverALSAMidi::unlock() const {
mutex.unlock();
}
PackedStringArray MIDIDriverALSAMidi::get_connected_inputs() {
PackedStringArray list;
lock();
for (int i = 0; i < connected_inputs.size(); i++) {
snd_rawmidi_t *midi_in = connected_inputs[i].rawmidi_ptr;
snd_rawmidi_info_t *info;
snd_rawmidi_info_malloc(&info);
snd_rawmidi_info(midi_in, info);
list.push_back(snd_rawmidi_info_get_name(info));
snd_rawmidi_info_free(info);
}
unlock();
return list;
}
MIDIDriverALSAMidi::MIDIDriverALSAMidi() {
exit_thread.clear();
}

41
drivers/alsamidi/midi_driver_alsamidi.h
View file

@ -51,24 +51,15 @@ class MIDIDriverALSAMidi : public MIDIDriver {
Thread thread;
Mutex mutex;
class InputConnection {
public:
struct InputConnection {
InputConnection() = default;
InputConnection(snd_rawmidi_t *midi_in) :
rawmidi_ptr{ midi_in } {}
// Read in and parse available data, forwarding any complete messages through the driver.
int read_in(MIDIDriverALSAMidi &driver, uint64_t timestamp, int device_index);
InputConnection(int p_device_index, snd_rawmidi_t *p_rawmidi);
Parser parser;
snd_rawmidi_t *rawmidi_ptr = nullptr;
private:
static const size_t MSG_BUFFER_SIZE = 3;
uint8_t buffer[MSG_BUFFER_SIZE] = { 0 };
size_t expected_data = 0;
size_t received_data = 0;
bool skipping_sys_ex = false;
void parse_byte(uint8_t byte, MIDIDriverALSAMidi &driver, uint64_t timestamp, int device_index);
// Read in and parse available data, forwarding complete events to Input.
void read();
};
Vector<InputConnection> connected_inputs;
@ -77,30 +68,12 @@ class MIDIDriverALSAMidi : public MIDIDriver {
static void thread_func(void *p_udata);
enum class MessageCategory {
Data,
Voice,
SysExBegin,
SystemCommon, // excluding System Exclusive Begin/End
SysExEnd,
RealTime,
};
// If the passed byte is a status byte, return the associated message category,
// else return MessageCategory::Data.
static MessageCategory msg_category(uint8_t msg_part);
// Return the number of data bytes expected for the provided status byte.
static size_t msg_expected_data(uint8_t status_byte);
void lock() const;
void unlock() const;
public:
virtual Error open();
virtual void close();
virtual PackedStringArray get_connected_inputs();
virtual Error open() override;
virtual void close() override;
MIDIDriverALSAMidi();
virtual ~MIDIDriverALSAMidi();

77
drivers/coremidi/midi_driver_coremidi.cpp
View file

@ -37,16 +37,30 @@
#import <CoreAudio/HostTime.h>
#import <CoreServices/CoreServices.h>
Mutex MIDIDriverCoreMidi::mutex;
bool MIDIDriverCoreMidi::core_midi_closed = false;
MIDIDriverCoreMidi::InputConnection::InputConnection(int p_device_index, MIDIEndpointRef p_source) :
parser(p_device_index), source(p_source) {}
void MIDIDriverCoreMidi::read(const MIDIPacketList *packet_list, void *read_proc_ref_con, void *src_conn_ref_con) {
MIDIPacket *packet = const_cast<MIDIPacket *>(packet_list->packet);
int *device_index = static_cast<int *>(src_conn_ref_con);
for (UInt32 i = 0; i < packet_list->numPackets; i++) {
receive_input_packet(*device_index, packet->timeStamp, packet->data, packet->length);
MutexLock lock(mutex);
if (!core_midi_closed) {
InputConnection *source = static_cast<InputConnection *>(src_conn_ref_con);
const MIDIPacket *packet = packet_list->packet;
for (UInt32 packet_index = 0; packet_index < packet_list->numPackets; packet_index++) {
for (UInt16 data_index = 0; data_index < packet->length; data_index++) {
source->parser.parse_fragment(packet->data[data_index]);
}
packet = MIDIPacketNext(packet);
}
}
}
Error MIDIDriverCoreMidi::open() {
ERR_FAIL_COND_V_MSG(client || core_midi_closed, FAILED,
"MIDIDriverCoreMidi cannot be reopened.");
CFStringRef name = CFStringCreateWithCString(nullptr, "Godot", kCFStringEncodingASCII);
OSStatus result = MIDIClientCreate(name, nullptr, nullptr, &client);
CFRelease(name);
@ -61,12 +75,27 @@ Error MIDIDriverCoreMidi::open() {
return ERR_CANT_OPEN;
}
int sources = MIDIGetNumberOfSources();
for (int i = 0; i < sources; i++) {
int source_count = MIDIGetNumberOfSources();
int connection_index = 0;
for (int i = 0; i < source_count; i++) {
MIDIEndpointRef source = MIDIGetSource(i);
if (source) {
MIDIPortConnectSource(port_in, source, static_cast<void *>(&i));
connected_sources.insert(i, source);
InputConnection *conn = memnew(InputConnection(connection_index, source));
const OSStatus res = MIDIPortConnectSource(port_in, source, static_cast<void *>(conn));
if (res != noErr) {
memdelete(conn);
} else {
connected_sources.push_back(conn);
CFStringRef nameRef = nullptr;
char name[256];
MIDIObjectGetStringProperty(source, kMIDIPropertyDisplayName, &nameRef);
CFStringGetCString(nameRef, name, sizeof(name), kCFStringEncodingUTF8);
CFRelease(nameRef);
connected_input_names.push_back(name);
connection_index++; // Contiguous index for successfully connected inputs.
}
}
}
@ -74,11 +103,17 @@ Error MIDIDriverCoreMidi::open() {
}
void MIDIDriverCoreMidi::close() {
for (int i = 0; i < connected_sources.size(); i++) {
MIDIEndpointRef source = connected_sources[i];
MIDIPortDisconnectSource(port_in, source);
mutex.lock();
core_midi_closed = true;
mutex.unlock();
for (InputConnection *conn : connected_sources) {
MIDIPortDisconnectSource(port_in, conn->source);
memdelete(conn);
}
connected_sources.clear();
connected_input_names.clear();
if (port_in != 0) {
MIDIPortDispose(port_in);
@ -91,26 +126,6 @@ void MIDIDriverCoreMidi::close() {
}
}
PackedStringArray MIDIDriverCoreMidi::get_connected_inputs() {
PackedStringArray list;
for (int i = 0; i < connected_sources.size(); i++) {
MIDIEndpointRef source = connected_sources[i];
CFStringRef ref = nullptr;
char name[256];
MIDIObjectGetStringProperty(source, kMIDIPropertyDisplayName, &ref);
CFStringGetCString(ref, name, sizeof(name), kCFStringEncodingUTF8);
CFRelease(ref);
list.push_back(name);
}
return list;
}
MIDIDriverCoreMidi::MIDIDriverCoreMidi() {}
MIDIDriverCoreMidi::~MIDIDriverCoreMidi() {
close();
}

21
drivers/coremidi/midi_driver_coremidi.h
View file

@ -34,6 +34,7 @@
#ifdef COREMIDI_ENABLED
#include "core/os/midi_driver.h"
#include "core/os/mutex.h"
#include "core/templates/vector.h"
#import <CoreMIDI/CoreMIDI.h>
@ -43,17 +44,25 @@ class MIDIDriverCoreMidi : public MIDIDriver {
MIDIClientRef client = 0;
MIDIPortRef port_in;
Vector<MIDIEndpointRef> connected_sources;
struct InputConnection {
InputConnection() = default;
InputConnection(int p_device_index, MIDIEndpointRef p_source);
Parser parser;
MIDIEndpointRef source;
};
Vector<InputConnection *> connected_sources;
static Mutex mutex;
static bool core_midi_closed;
static void read(const MIDIPacketList *packet_list, void *read_proc_ref_con, void *src_conn_ref_con);
public:
virtual Error open();
virtual void close();
virtual Error open() override;
virtual void close() override;
PackedStringArray get_connected_inputs();
MIDIDriverCoreMidi();
MIDIDriverCoreMidi() = default;
virtual ~MIDIDriverCoreMidi();
};

55
drivers/winmidi/midi_driver_winmidi.cpp
View file

@ -36,26 +36,42 @@
void MIDIDriverWinMidi::read(HMIDIIN hMidiIn, UINT wMsg, DWORD_PTR dwInstance, DWORD_PTR dwParam1, DWORD_PTR dwParam2) {
if (wMsg == MIM_DATA) {
receive_input_packet((int)dwInstance, (uint64_t)dwParam2, (uint8_t *)&dwParam1, 3);
// For MIM_DATA: dwParam1 = wMidiMessage, dwParam2 = dwTimestamp.
// Windows implementation has already unpacked running status and dropped any SysEx,
// so we can just forward straight to the event.
const uint8_t *midi_msg = (uint8_t *)&dwParam1;
send_event((int)dwInstance, midi_msg[0], &midi_msg[1], 2);
}
}
Error MIDIDriverWinMidi::open() {
int device_index = 0;
for (UINT i = 0; i < midiInGetNumDevs(); i++) {
HMIDIIN midi_in;
MIDIINCAPS caps;
MMRESULT res = midiInOpen(&midi_in, i, (DWORD_PTR)read, (DWORD_PTR)i, CALLBACK_FUNCTION);
if (res == MMSYSERR_NOERROR) {
MMRESULT open_res = midiInOpen(&midi_in, i, (DWORD_PTR)read,
(DWORD_PTR)device_index, CALLBACK_FUNCTION);
MMRESULT caps_res = midiInGetDevCaps(i, &caps, sizeof(MIDIINCAPS));
if (open_res == MMSYSERR_NOERROR) {
midiInStart(midi_in);
connected_sources.insert(i, midi_in);
connected_sources.push_back(midi_in);
if (caps_res == MMSYSERR_NOERROR) {
connected_input_names.push_back(caps.szPname);
} else {
// Should push something even if we don't get a name,
// so that the IDs line up correctly on the script side.
connected_input_names.push_back("ERROR");
}
// Only increment device index for successfully connected devices.
device_index++;
} else {
char err[256];
midiInGetErrorText(res, err, 256);
midiInGetErrorText(open_res, err, 256);
ERR_PRINT("midiInOpen error: " + String(err));
MIDIINCAPS caps;
res = midiInGetDevCaps(i, &caps, sizeof(MIDIINCAPS));
if (res == MMSYSERR_NOERROR) {
if (caps_res == MMSYSERR_NOERROR) {
ERR_PRINT("Can't open MIDI device \"" + String(caps.szPname) + "\", is it being used by another application?");
}
}
@ -64,25 +80,6 @@ Error MIDIDriverWinMidi::open() {
return OK;
}
PackedStringArray MIDIDriverWinMidi::get_connected_inputs() {
PackedStringArray list;
for (int i = 0; i < connected_sources.size(); i++) {
HMIDIIN midi_in = connected_sources[i];
UINT id = 0;
MMRESULT res = midiInGetID(midi_in, &id);
if (res == MMSYSERR_NOERROR) {
MIDIINCAPS caps;
res = midiInGetDevCaps(i, &caps, sizeof(MIDIINCAPS));
if (res == MMSYSERR_NOERROR) {
list.push_back(caps.szPname);
}
}
}
return list;
}
void MIDIDriverWinMidi::close() {
for (int i = 0; i < connected_sources.size(); i++) {
HMIDIIN midi_in = connected_sources[i];
@ -90,9 +87,7 @@ void MIDIDriverWinMidi::close() {
midiInClose(midi_in);
}
connected_sources.clear();
}
MIDIDriverWinMidi::MIDIDriverWinMidi() {
connected_input_names.clear();
}
MIDIDriverWinMidi::~MIDIDriverWinMidi() {

8
drivers/winmidi/midi_driver_winmidi.h
View file

@ -48,12 +48,10 @@ class MIDIDriverWinMidi : public MIDIDriver {
static void CALLBACK read(HMIDIIN hMidiIn, UINT wMsg, DWORD_PTR dwInstance, DWORD_PTR dwParam1, DWORD_PTR dwParam2);
public:
virtual Error open();
virtual void close();
virtual Error open() override;
virtual void close() override;
virtual PackedStringArray get_connected_inputs();
MIDIDriverWinMidi();
MIDIDriverWinMidi() = default;
virtual ~MIDIDriverWinMidi();
};